阅读说明：本技术 一种模压托盘 (Mould pressing tray ) 是由 吴侨立 于 2018-08-17 设计创作，主要内容包括：本发明提供一种模压托盘,包括托盘本体,托盘本体上设有托脚结构和加强结构,加强结构是被压制在托盘本体表面上的以凹槽结构体现的加强筋,加强筋包括连接式加强筋、隔断式加强筋和半隔断式加强筋,托脚结构包括角部托脚、边缘托脚和中心托脚,其中,隔断式加强筋的两端都不和上述托脚连通。其结构设计合理,承压能力强,对于加强筋的聚集处以及托脚等应力集中位置有针对性地进行布局和设计,克服现有技术中托盘局部承压强度不高,容易产生应力断裂和局部开裂等问题。(The invention provides a die pressing tray which comprises a tray body, wherein a supporting foot structure and a reinforcing structure are arranged on the tray body, the reinforcing structure is a reinforcing rib which is pressed on the surface of the tray body and is embodied in a groove structure, the reinforcing rib comprises a connecting reinforcing rib, a partition type reinforcing rib and a semi-partition type reinforcing rib, the supporting foot structure comprises a corner supporting foot, an edge supporting foot and a center supporting foot, and two ends of the partition type reinforcing rib are not communicated with the supporting feet. The tray is reasonable in structural design and strong in bearing capacity, stress concentration positions such as the gathering positions of the reinforcing ribs and the supporting feet are purposefully distributed and designed, and the problems that in the prior art, the local bearing strength of the tray is not high, stress fracture and local cracking are easily caused and the like are solved.)

1. The utility model provides a mould pressing tray, includes tray body, is equipped with on the tray body and holds in the palm foot structure and additional strengthening, characterized by, additional strengthening is the strengthening rib that is suppressed and embodies with groove structure on the tray body surface, and the strengthening rib includes connection type strengthening rib, wall formula strengthening rib and half wall formula strengthening rib, holds in the palm the foot structure and includes that bight holds in the palm foot, edge and center and hold in the palm the foot, and wherein, the both ends of wall formula strengthening rib do not communicate with above-mentioned support foot.

2. The molding tray according to claim 1, wherein the tray body is formed in a square shape as a whole, and four sides of the square shape are all equal in length.

3. The molding tray according to claim 2, wherein outer edges of four corners of the square are inverted into an arc shape.

4. A molding tray according to claim 3 wherein the connecting reinforcement is connected at both ends to the legs, the connecting reinforcement being disposed between the corner legs and the center leg and between the edge legs on adjacent sides, respectively.

5. The molding pallet of claim 3, wherein the semi-blocking rib is disposed between the edge rest and the center rest, one end of the semi-blocking rib being connected to a side edge of the center rest and the other end extending to a position adjacent to a side of the edge rest.

6. A stamped pallet according to claim 3 wherein connecting ribs are provided between the edge legs and adjacent corner legs, the connecting ribs connecting the four edges of the pallet to form a larger square; the semi-partition type reinforcing ribs equally divide the tray body into four smaller squares; the connecting reinforcing ribs between the corner supporting legs and the central supporting leg and the connecting reinforcing ribs between the edge supporting legs on the adjacent side edges are intersected with each other in pairs to form four cross reinforcing rib groups, the four cross reinforcing rib groups are respectively positioned in four square areas separated by the half-partition type reinforcing ribs, connecting lines between the corner supporting legs and the central supporting legs at opposite angles are positioned on the same straight line, and a large cross reinforcing rib group is formed integrally; the cross reinforcing rib group in the smaller square divides the small square into four small triangular areas, the edges of the two small triangular areas are sealed by connecting reinforcing ribs between edge supporting feet positioned on the side edges of the tray and corner supporting feet to form a closed small triangular area, the other two small triangular areas use half partition type reinforcing ribs as triangular hypotenuses to form a non-closed small triangular area, the partition type reinforcing ribs are arc-shaped reinforcing ribs, and the arc-shaped reinforcing ribs are positioned in the closed small triangular area and two ends of the arc-shaped reinforcing ribs face two ends of the hypotenuses of the closed small triangular area.

7. The molding tray according to claim 1, wherein the corner stand-offs are provided at four corners of the molding tray, the edge stand-offs are provided at a central portion of an edge of the molding tray, and the center stand-offs are provided at a central position of the molding tray; the height of the corner supporting foot, the height of the edge supporting foot and the height of the center supporting foot are the same, so that the bottoms of all the supporting feet can be positioned on the same plane when the tray is flatly placed.

8. The molding pallet of claim 7, wherein the bottom plate of the central leg and the four corner legs are square; the bottom plate of the edge support leg is rectangular.

9. The molded tray of claim 7, wherein the stand-off portion comprises a stand-off sidewall and a stand-off base; the side wall of each supporting foot is inclined inwards, so that each supporting foot is in a shape with a large top and a small bottom.

10. The molding tray according to claim 9, wherein a step surface is provided on an outer surface of the leg side wall; the step surface comprises a longitudinal surface and a transverse surface, the longitudinal surface is arranged along the height direction of the tray body, the transverse surface is connected with two adjacent longitudinal surfaces or is connected with one longitudinal surface and the side wall of the supporting foot, and a continuous step surface is formed on the outer surface of the side wall of the supporting foot through a continuous connection mode of the longitudinal surface, the transverse surface, the longitudinal surface or the longitudinal surface, the transverse surface, the side wall of the supporting foot and the longitudinal surface; and reinforcing ribs are arranged on one side wall or side edge of the corner support leg and the edge support leg, the reinforcing ribs extend downwards from the opening of the support leg to the middle position of the support leg, inward concave parts are formed on the inner surfaces of the side walls of the support leg by the reinforcing ribs, and outward protruding parts are formed on the outer surfaces of the side walls of the support leg.

Technical Field

The invention relates to a molded tray.

Background

The pallet is a carrier for stacking goods and is a tool for mechanical loading, unloading and carrying. The pallet integrates scattered small goods and containers according to a certain quantity, and the small goods and the containers are transported in a unit form and form a transportation system of a container unit together with a forklift, so that the pallet becomes an indispensable important appliance of a modern logistics system and is generally adopted by all countries in the world.

In 1971, Werzalit's patent technology for manufacturing particle boards by molding wood shavings with a wood fiber material mixed with a thermosetting resin in a metal mold was invented. The first molded shaving tray manufacturing company (Presswood pellet Plant) was established in 1979 by Litco using this technology.

The molded tray is a plant fiber molded plane industrial tray, the raw materials used by the common molded tray are wood shavings, wood chips, plant straws and the like, the molded tray is of an integral structure, and the panel and 9 supporting legs are molded by one-time molding. The upper surface of the tray plate is flat and smooth, the transportation of various goods can be met, and the lower surface is provided with reinforcing ribs. The stress on the board surface is balanced vertically and horizontally, and nine feet are distributed to meet the requirement of four-way insertion of a forklift, and the forklift belongs to a plane four-way fork-entering single-side tray.

The molded industrial tray is an important type of molded wood shaving product, is mainly used for carrying and storing goods in wharfs, goods yards, warehouses, workshops, markets and the like, forms a moving unit or a carrying unit together with the goods, and is matched with forklifts, carrying vehicles, cranes and the like. The general specification of the industrial tray is 400mm ~600mm, 600mm ~800mm, 800mm ~1000mm, 1000mm ~1200mm, 1100mm ~1100 mm. The dynamic bearing capacity is 250 kg-1500 kg, the self weight of the tray is 10 kg-20 kg, and the arc-shaped edge, the trough beam and the ingenious perfect reinforcing rib design of the tray enable the load-carrying coefficient to be as high as 80 (dynamic load). The shavings mold pressing industrial tray is a special-shaped, constant-strength thin-shell component, has light dead weight and high strength, and the ratio of the bearing capacity to the dead weight (the load capacity) of the tray is as high as 60-80 (dynamic load) and 200-300 (static load).

Because the materials of the mould pressing tray come from straws, branches, wood chips and the like which are recyclable resources, the production process usually adopts modes of hot pressing and the like, and raw materials and processes are relatively environment-friendly, the mould pressing tray increasingly occupies the theme of the tray market, the research on the mould pressing tray is more and more intensive, how to better utilize environment-friendly raw materials and how to improve the bearing and strength of the tray are the key research directions of the mould pressing tray.

Compared with the traditional plastic tray, the die pressing tray has the advantages of environment-friendly material taking, simple manufacturing process, low manufacturing cost, small environmental pollution in the manufacturing process, less post-manufacturing treatment procedures and the like.

Compare with traditional wooden tray, the mould pressing tray has very big advantage in the aspect of drawing materials undoubtedly, the drawing materials of mould pressing tray are processing waste material such as saw-dust or crops waste material usually, for example straw etc., compare with the wooden tray that needs lumbering to draw materials, the mould pressing tray is not only reduce cost, the requirement of energy-concerving and environment-protective and protection non-renewable resources has been accorded with more, in addition, its intensity and durability can receive humidity and temperature's influence in the environment when wooden material is deposited, under the great condition of humidity, wooden material is very easy to go mildy and carry and lead to the performance to descend by a wide margin, life is also very limited, under the comparison, the mould pressing tray of making by the mould pressing technology of industrial production, because density is big, the factor that receives the environmental impact is showing and is reduced, the stability of performance maintenance promotes by a wide margin under. Moreover, the strength of wooden pallets is greatly affected by the raw material selection, and pallets made of different wooden materials are likely to have great differences in performance. In addition, after the wooden material is cut and formed, the surface roughness is high, a lot of burrs are likely to be generated on the corners and even the surface, if the surface of the wooden tray is polished, the production cost and the production period are undoubtedly greatly increased, but if the wooden tray is not polished, the application range is reduced, for example, only an object which is wear-resistant or has a rough surface per se can be placed, and the wooden tray is not suitable for parts needing protection.

Therefore, the proportion of molded trays in the tray market has increased year by year, and with the continuous improvement and improvement of the production technology of molded trays, the use frequency of molded trays has been increased in a doubling proportion in recent years, while the use proportion of the conventional trays has been decreased at a great speed.

Chinese patent CN201721248397.1 discloses a pallet with equidistant forking, which comprises a panel and a bottom support leg structure, wherein the bottom support leg structure comprises a central bottom support leg, a bottom angle support leg and an edge support leg; the panel sets up oblique latticed recess, oblique latticed recess is divided into four square regions and eight isosceles right triangle regions with the panel, and the central point after four square regions of telling make up puts central base foot, base angle base foot and edge base foot all adopt the rectangular terrace structure, set up connecting grooves between base angle base foot and the edge base foot, connecting grooves is "protruding" shape straight way structure. The tray structure disclosed in the patent can improve the bearing capacity of the tray to a certain extent, but in practical use, it is found that the stress at some local positions of the tray may be large due to the arrangement problem of the reinforcing ribs, and the tray is easy to break. In addition, in the design of the supporting leg of the tray, the design of the reinforcing rib on the inner wall of the supporting leg and the structure of the supporting leg are not considered completely, for example, the design of the reinforcing rib on the inner wall of the supporting leg is not favorable for mold opening, and the transition part between the reinforcing rib and the inner wall of the supporting leg has hard connection, so that the stress concentration of part of the inner wall of the supporting leg is easy to cause, and the brittle fracture may be generated at the supporting leg part, thereby affecting the overall strength of the tray. In addition, the shapes and the inclination radians of the inner and outer walls of the bracket also affect the bearing strength of the tray, for example, the outer wall of the bracket is provided with some shapes or grooves, the grooves inevitably cause the wall thickness of the side wall of the bracket to be different at different positions, the pressure stress which can be borne by different wall thicknesses is also different, and especially for the bracket part with the inclined wall surface, if different wall thicknesses are arranged at inappropriate positions on the inclined wall surface, the pressure bearing capacity of the bracket part is likely to be greatly affected.

Disclosure of Invention

The invention aims to solve the technical problem of providing a die pressing tray which is reasonable in structural design and strong in bearing capacity, pertinently arranges and designs stress concentration positions such as a reinforcing rib gathering position and a supporting foot and the like, and solves the problems that the tray in the prior art is low in local bearing strength, easy to generate stress fracture and local cracking and the like.

Therefore, the invention provides the following technical scheme:

the utility model provides a mould pressing tray, includes tray body, is equipped with on the tray body and holds in the palm foot structure and additional strengthening, and additional strengthening is the strengthening rib that is suppressed and embodies with groove structure on the tray body surface, and the strengthening rib includes connection type strengthening rib, wall formula strengthening rib and half wall formula strengthening rib, holds in the palm the foot structure and includes that bight holds in the palm foot, edge support foot and center and hold in the palm the foot, and wherein, the both ends of wall formula strengthening rib all do not communicate with above-mentioned support foot.

Further, the tray body is square on the whole, and four sides of the square are equal in length.

Further, the outer edges of the four corners of the square are inverted into an arc shape.

Furthermore, both ends of the connecting reinforcing ribs are communicated with the supporting feet, and the connecting reinforcing ribs are respectively arranged between the corner supporting feet and the center supporting feet and between the edge supporting feet on the adjacent side edges.

Furthermore, half partition type strengthening rib sets up between edge support foot and center support foot, and half partition type strengthening rib's one end and center support foot's side are connected, and the other end extends to and is close to on the position of edge support foot one side.

Furthermore, connecting reinforcing ribs are arranged between the edge supporting feet and the adjacent corner supporting feet, and the four edges of the tray are connected into a larger square by the connecting reinforcing ribs; the semi-partition type reinforcing ribs equally divide the tray body into four smaller squares; the connecting reinforcing ribs between the corner supporting legs and the central supporting leg and the connecting reinforcing ribs between the edge supporting legs on the adjacent side edges are intersected with each other in pairs to form four cross reinforcing rib groups, the four cross reinforcing rib groups are respectively positioned in four square areas separated by the half-partition type reinforcing ribs, connecting lines between the corner supporting legs and the central supporting legs at opposite angles are positioned on the same straight line, and a large cross reinforcing rib group is formed integrally; the cross reinforcing rib group in the smaller square divides the small square into four small triangular areas, the edges of the two small triangular areas are sealed by connecting reinforcing ribs between edge supporting feet positioned on the side edges of the tray and corner supporting feet to form a closed small triangular area, the other two small triangular areas use half partition type reinforcing ribs as triangular hypotenuses to form a non-closed small triangular area, the partition type reinforcing ribs are arc-shaped reinforcing ribs, and the arc-shaped reinforcing ribs are positioned in the closed small triangular area and two ends of the arc-shaped reinforcing ribs face two ends of the hypotenuses of the closed small triangular area.

Furthermore, corner supporting feet are arranged at four corners of the mould pressing tray, edge supporting feet are arranged in the middle of the edge of the mould pressing tray, and a center supporting foot is arranged at the center of the mould pressing tray; the height of the corner supporting foot, the height of the edge supporting foot and the height of the center supporting foot are the same, so that the bottoms of all the supporting feet can be positioned on the same plane when the tray is flatly placed.

Furthermore, the bottom plates of the central support leg and the four corner support legs are square; the bottom plate of the edge support leg is rectangular.

Furthermore, the foot supporting part comprises a foot supporting side wall and a foot supporting bottom plate; the side wall of each supporting foot is inclined inwards, so that each supporting foot is in a shape with a large top and a small bottom.

Furthermore, step surfaces are arranged on the outer surfaces of the side walls of the support legs; the step surface comprises a longitudinal surface and a transverse surface, the longitudinal surface is arranged along the height direction of the tray body, the transverse surface is connected with two adjacent longitudinal surfaces or is connected with one longitudinal surface and the side wall of the supporting foot, and a continuous step surface is formed on the outer surface of the side wall of the supporting foot through a continuous connection mode of the longitudinal surface, the transverse surface, the longitudinal surface or the longitudinal surface, the transverse surface, the side wall of the supporting foot and the longitudinal surface; and reinforcing ribs are arranged on one side wall or side edge of the corner support leg and the edge support leg, the reinforcing ribs extend downwards from the opening of the support leg to the middle position of the support leg, inward concave parts are formed on the inner surfaces of the side walls of the support leg by the reinforcing ribs, and outward protruding parts are formed on the outer surfaces of the side walls of the support leg.

In a first aspect of the invention, the invention provides a die pressing tray, which comprises a tray body, wherein a supporting foot structure and a reinforcing structure are arranged on the tray body, the supporting foot structure and the reinforcing structure are both protruded out of the lower surface of the tray body, the supporting foot structure forms a supporting structure of the tray body, and the supporting structure can make the tray body overhead, so that a certain distance is formed between the lower surface of the tray body and a lower-layer object. If the support leg structure does not exist, the lower surface of the tray body can be directly contacted with a placing plane, or is directly contacted with the object on the next layer and/or the upper surface of the tray, large-area friction can be generated in the processes of forking, stacking and the like, the tray is usually used for bearing the object with larger weight, if the friction area is increased, the operation is not facilitated, the contact surface of the tray can be abraded to a large extent, the service life of the tray is greatly shortened, meanwhile, the support structure is not erected, the contact surfaces of the tray can be tightly attached together due to heavy pressure, the state is kept for a long time, the gas between the two contact surfaces can be completely exhausted, even the two surfaces are mutually fused, the two surfaces are tightly attached together and are difficult to separate, and therefore, some overhead structures are required to be arranged on the tray body.

In some preferred schemes, the overhead structure can meet the requirement that when different trays of the same specification are stacked together, a part of surfaces of the overhead structures of the adjacent trays on the upper layer and the lower layer are in contact with each other, and a part of surfaces of the overhead structures of the adjacent trays on the lower layer are not in contact with each other, for example, when the trays are stacked together, the supporting feet of the tray on the upper layer can be inserted into the supporting feet of the tray on the lower layer, but only can be inserted into a part of the supporting feet, such as the position of 1/3, so that a certain gap can be reserved inside the supporting foot structure, the supporting feet cannot be completely attached, and a certain gap can be reserved between the upper tray and the lower tray, so that the surfaces are prevented from being excessively attached.

In some preferred modes, the supporting foot structure comprises a corner supporting foot, an edge supporting foot and a center supporting foot, four corner supporting feet are respectively arranged on four corners of a square, edge supporting feet are respectively arranged on four sides of the square, the edge supporting foot is positioned in the middle of two adjacent corner supporting feet, and a center supporting foot is further arranged at the center of the square tray body, so that a nine-supporting-foot relatively stable structure is formed.

In some preferred schemes, the tray body is in a square shape as a whole, four sides of the square shape are all equal in length, so that the tray can be placed in any left-right or front-back direction, which makes the tray of the present invention different from the tray with a non-square structure, some trays may be adjusted in length-width ratio, for the tray with unequal length, the fork feeding can be performed only on one side of the long side or the short side, for example, in one-time pallet loading, the fork feeding is performed uniformly from the long side, there is a requirement for the stacking direction of the tray itself, the fork feeding distance is different for the trays with different length-width, and if the fork feeding is performed from the short side, it is possible that the fork feeding width requirement of the forklift can not be reached due to the short side length of the short side, if the fork feeding width requirement of the long side length is satisfied, the fork feeding width is not matched with the fork feeding width of the long side, so that the actual fork feeding width of the long side is smaller than the fork feeding width of the long side, resulting in long-edge fork instability. In addition, if make circularly, from the angle of fork advancing, circularly not have the side direction limit, be difficult for looking for fork advancing direction, circular tray's edge all is the arc moreover, and the direction of advancing the mechanism is not matchd with fork truck etc. fork, has increased the fork and has advanced the distance, and this part distance that increases is effective distance again, is unfavorable for fork advancing consequently, and the tray body suits to set up to the square.

In some preferred schemes, the outer edges of the four corners of the square are inverted into an arc shape, the arc shape is favorable for forming, and the four corners are arranged into the arc shape, so that the abrasion and even cutting of the tray to surrounding objects and environments can be reduced.

In a second aspect of the present invention, there is provided a reinforcing structure on a molded pallet, the reinforcing structure being mainly disposed on a surface of a pallet body, the reinforcing structure being mainly embodied as a reinforcing rib having a groove structure pressed on the surface of the pallet body, the reinforcing rib including a connection type reinforcing rib, a partition type reinforcing rib, and a half partition type reinforcing rib, which are distinguished mainly by whether the reinforcing rib is communicated with a stand-off leg, the reinforcing rib having both ends communicated with the stand-off leg is referred to as a connection type reinforcing rib, the reinforcing rib having both ends not communicated with the stand-off leg (or other structures on the pallet) is referred to as a partition type reinforcing rib, one end is communicated with the stand-off leg, and the reinforcing rib having the other end not communicated with the stand-off leg is referred to as a half partition type reinforcing rib, and it is preferable to simultaneously dispose the above three types of reinforcing ribs on one pallet in combination with the disposition of the stand-off leg structure through research and, the reinforcing ribs are used for adjusting the pressure bearing capacity between the tray body and the supporting foot structure due to different structures and heights.

In some preferred schemes, a semi-isolating reinforcing rib is arranged between the edge supporting foot and the central supporting foot, one end of the semi-isolating reinforcing rib is communicated with the edge supporting foot, and the other end of the semi-isolating reinforcing rib extends to a position close to one side edge of the central supporting foot. In some preferred forms, one end of the semi-blocking stiffener is connected to a side of the central leg and the other end extends to a position adjacent to a side of the edge leg. The semi-partition type reinforcing rib is mainly suitable for the situation that a certain supporting leg is excessively connected with a reinforcing rib and is not suitable for being reconnected with the reinforcing rib, but the area of a tray body between the semi-partition type reinforcing rib and other supporting legs is large, and the reinforcing rib needs to be arranged. In some preferred solutions, the semi-partitioned ribs divide the tray body equally into four small square sections.

In some preferred schemes, the corner support leg and the center support leg and the edge support legs on the adjacent side edges are provided with connecting reinforcing ribs, the connecting reinforcing ribs of the part are intersected with each other in pairs to form four cross reinforcing rib groups, the four cross reinforcing rib groups are respectively positioned in four parts separated by the half-partition type reinforcing ribs, in addition, connecting lines between the diagonal corner support leg and the center support leg are positioned on the same straight line, thus, a large cross reinforcing rib group is formed on the whole, the whole tray body is uniformly divided into four triangular parts by the large cross reinforcing rib group, the cross is a stable reinforcing form, and the whole tray body is supported by a reinforcing structure through the combination of a whole large cross and four small cross parts.

In some preferred schemes, connecting reinforcing ribs are arranged between the edge supporting feet and the adjacent corner supporting feet, the connecting reinforcing ribs connect the four edges of the tray into a square, the square enables all four corners on the edges of the tray body to be connected into a whole, and the body between the supporting feet and the supporting feet is reinforced and supported.

In some preferred schemes, the cross structure in the small square divides the small square into four small triangular areas, wherein the edges of two small triangular areas are sealed by the connecting reinforcing ribs between the edge supporting feet and the corner supporting feet on the side of the tray to form a closed small triangular area, while the other two small triangular areas use the semi-partition reinforcing ribs as the bevel edges of the triangle to form a non-closed small triangular area, relatively speaking, the non-closed small triangular area is closer to the central part of the tray, on one hand, the central part has a large bearing area, pressure can be uniformly distributed, and only one central supporting foot is arranged on the supporting foot of the central part, the whole structure is relatively uniform, and relatively stable strength is relatively, but the closed small triangular area is close to the edge part of the tray, and the edge part itself belongs to a part where stress is easily concentrated, and the supporting feet at the edge part are distributed more densely, especially at the position close to the corner part, so that an additional reinforcing structure is needed to be added, and the pressure bearing capacity of the whole tray is closer to the same. Therefore, in some preferred schemes, in the closed small triangular area, the isolated reinforcing ribs are arranged, the isolated reinforcing ribs correspond to the closed small triangular area one by one, and the isolated reinforcing ribs mainly play a role in reinforcing the strength of the edge and the corner of the tray, particularly the strength of the closed small triangular area. In some preferred forms, the partition type reinforcing bars are arc-shaped reinforcing bars, and both ends of the arc-shaped reinforcing bars face both ends of the hypotenuse of the closed small triangular region, that is, both ends of the connective reinforcing bars located at the edge of the closed small triangular region are closed. In the prior art, there are also situations where similar arc-shaped reinforcing ribs are provided, for example, the arc-shaped reinforcing ribs are also provided in the trays which are equidistantly forked in the background art, but the arc-shaped reinforcing ribs in the background art are usually communicated with the support legs, in fact, not only the arc-shaped reinforcing ribs but also the reinforcing ribs of most trays in the prior art are communicated with the support legs, on one hand, this is a conventional design method, on the other hand, for the molding tray, if an area completely separated from other areas is provided, the difficulty of the molding process and the mold opening process is increased, because the molding raw materials in the independent areas cannot be communicated with other areas for balancing. The technical scheme of the invention has no difficulty, because the thickness of the reinforcing rib is consistent with the thickness of the tray, the size of the upper die and the lower die can be adjusted according to the shape, and in the invention, the section of the arc-shaped reinforcing rib is of a structure with a large upper part and a small lower part, and two ends of the arc-shaped reinforcing rib are in fillet transition, so that the die sinking is not influenced. Moreover, if the connecting reinforcing ribs are also adopted in the closed small triangular area, namely the reinforcing ribs are communicated with the corner supporting feet, as shown in the figure, the opening of the corner supporting feet facing the side in the tray is completely occupied by the connection of the reinforcing ribs, and in experiments and practical use, the reinforcing structure can cause stress concentration of the supporting feet, the connecting parts of the supporting feet and the reinforcing ribs are easy to brittle fracture, and the strength which can be borne by the whole tray is reduced by about 10%. Therefore, the closed small triangular area is reinforced by adopting the partition type reinforcing ribs. In some preferred schemes, the distance between the two ends of the partition type reinforcing rib and the edge of the opening at the upper end of the supporting foot is not larger than the width of the reinforcing rib, and the reinforcing rib needs to be distributed on the surface of the tray body as much as possible, so that the tail end of the reinforcing rib still needs to be close to the supporting foot part, and if the reinforcing rib cannot penetrate through, the reinforcing effect on a certain area cannot be achieved.

The sizes are relative, for example, for a triangle, two connecting reinforcing ribs at opposite corners divide the whole tray into triangles, and the area of the triangle is larger than that of the triangle which is divided by the connecting reinforcing ribs between the corner support foot, the central support foot and the adjacent edge support foot, so that the former is called as a large triangle or a large triangle, and the latter is called as a small triangle or a small triangle, or the latter is a part of the former. For a square, a square divided by the connecting reinforcing ribs on the edge of the whole tray has a larger area than four squares divided by the half-partition reinforcing ribs, so that the former is called a large square or a large square, and the latter is called a small square or a small square, or the latter is a part of the former.

In some preferred modes, the transverse partition type reinforcing ribs positioned at the edges of the tray are provided with notches, and the notches can play a role in facilitating the drawing and can also be used as clamping positions in the carrying process of the tray.

In a third aspect of the present invention, the present invention provides a stand bar structure of a molding pallet.

The supporting foot structure comprises corner supporting feet, edge supporting feet and a center supporting foot, four corner supporting feet are arranged on four corners of a square respectively, edge supporting feet are arranged on four sides of the square respectively, the edge supporting feet are located in the middle of two adjacent corner supporting feet, and a center supporting foot is arranged at the center of the square tray body.

In some preferred embodiments, the overall shape of the central stand-off is also square, where square refers to the shape of the base of the central stand-off. In some preferred embodiments, the bottom panels of the corner standoffs and the bottom panel of the center standoffs are the same size and shape. In some preferred schemes, the bottom plate of the edge stand bar is rectangular, and the rectangular side with the same direction as the side of the rectangle is the long side, and the other two sides are the short sides. In some preferred modes, the four corners of the square and the rectangle are rounded, and the edge supporting leg is configured to be rectangular, because the position between the edge supporting leg and the corner supporting leg is a forking position, the width of the forking position must be matched with a forking component of the forking mechanism, since the corner supporting leg cannot change in length, and if the corner supporting leg is enlarged as a whole, the strength of the supporting leg part or even the whole tray may be affected, and the length of the edge supporting leg (i.e. the length along the side of the side) can be adjusted appropriately, so as to adjust the distance between the corner supporting leg and the edge supporting leg, and extend or increase from the edge supporting leg to the corner supporting leg on both sides, so as to adjust the distance between the edge supporting leg and the corner supporting leg, so that the forking distance of the tray can meet the forking requirement.

In some preferred schemes, the side walls of the supporting feet are inclined inwards, so that the supporting feet are formed into a shape with a large upper part and a small lower part, therefore, for a tray with the same specification, the size of the outermost end of the supporting feet is obviously smaller than that of the opening of the tray, the supporting feet on the upper layer can be inserted into the supporting feet on the lower layer, but due to the fact that the thickness of the wall of the tray is thick and the opening of the supporting feet is large, the supporting feet of the upper layer tray can only be partially inserted into the supporting feet of the lower layer tray and cannot be completely attached.

In some preferred aspects, the stand-off portion includes a stand-off side wall and a stand-off bottom plate.

In some preferred embodiments, both the inner and outer surfaces of the footrest floor are planar. In some preferred schemes, the outer surface of the bottom plate of the foot support is a plane, and the inner surface has a certain inclination. In some preferred schemes, the outer surface of the bottom board of the foot support is a plane, two sides of the inner surface incline towards the middle part, and the lowest part is formed in the middle part. In some preferred embodiments, the lowest point is a V-groove. In some preferred embodiments, the lowest point is a U-shaped groove. U-shaped recess for V-arrangement recess, the groove width at bottommost will be wider a little for the groove width, when the tray width is great, can select for use U-shaped recess, because the tray width is big, relatively speaking, the size of support foot also can be corresponding big, under the little condition of tray thickness variation, if still adopt V-arrangement recess, it is possible that the support foot lateral wall at support foot bottom recess both sides can be thicker, if the thickness of support foot lateral wall bottom and other positions differs too greatly, be unfavorable for the holistic atress of support foot even, consequently, when the length of a side of tray exceeds 900mm or support foot and the V-arrangement recess the width of a groove in the direction on the unanimity and exceed 60mm, adopt U-arrangement recess. In some preferred forms, the width of the bottom of the U-shaped groove does not exceed 1/2 the width of the bottom of the tray, and the U-shaped groove should not be too wide, which would otherwise affect the strength of the stand-off base and the junction of the stand-off base and the stand-off side walls. In some preferred embodiments, the direction of the groove is the same as the direction of one of the side edges of the tray. In some preferred embodiments, the direction of the groove is at an angle, such as 15 °, 30 °, 45 ° or 60 °, to the direction of one of the sides of the tray, and the angle can be adjusted according to the depth of the stand-off and the angle of inclination of the stand-off side walls. In some preferred modes, when the inclination angle of the side wall of the supporting foot exceeds 30 °, the inclination of the groove can be properly adjusted, because if the inclination angle of the side wall of the tray is large, the lateral compressive stress and the shear stress applied to the side wall of the tray become large, when the inner surface of the bottom plate of the supporting foot is a groove, the inner surface of the side wall of the supporting foot must have inclined planes matched with the two sides of the groove, and the force applied to the inner surface of the supporting foot is completely distributed on the inclined planes, so that the stress applied to the side wall of the supporting foot is concentrated on the two sides with the inclined planes, the stress applied to the supporting foot part is not uniform, if the groove direction of the inner surface of the bottom plate of the supporting foot is properly changed, the inclined planes are twisted along the change of the groove direction, and thus, all parts of the side wall of the supporting foot can bear lateral component force, so that the stress applied to the supporting foot part is relatively, the situation of local overlarge stress can not occur. In some preferred modes, the directions of the grooves in different support legs in the same arrangement can be different, so that the divergence of stress distribution is better, and stress concentration is avoided.

In some preferred embodiments, the thickness of the foot rest base plate is the same as the thickness of the tray body, and the thickness of the foot rest base plate is the minimum thickness of the foot rest base plate, that is, the thickness of the groove part is removed, and the remaining thickness of the foot rest base plate is the minimum thickness of the foot rest base plate. In some preferred aspects, the thickness of the tray base is not less than the thickness of the tray body. The foot supporting bottom plate is the position for bearing stress and pressure concentration on the whole tray, so that the thickness of the foot supporting bottom plate must be ensured, and the integral supporting strength of the tray can be ensured. In some preferred schemes, the thickness of the joint of the foot supporting bottom plate and the foot supporting side wall is larger than that of the foot supporting bottom plate, and the joint of the foot supporting bottom plate and the foot supporting side wall needs larger thickness to ensure the strength because the structure is bent, and the bent part is generally a stress concentration part. In some preferred modes, the inner wall of the joint of the foot supporting bottom plate and the foot supporting side wall is a smooth transition cambered surface, and the smooth transition cambered surface can counteract the stress concentration of a part of the bent part.

In some preferred schemes, set up the step face on the surface of support foot lateral wall, because the tray when piling up together, the support foot of upper tray is inserted in the support foot of lower floor's tray, therefore, set up the step face, can reduce the contact surface of upper and lower layer support foot, thereby reduce the contact friction when upper and lower layer tray is piled up, furthermore, continuous step face can form unevenness's shape on the surface of support foot lateral wall, it must have peak shape and valley shape between the unevenness shape, the inward recess of valley shape, the ventilative clearance between the tray can be formed to the valley shape of recess, like this, even the quantity of piling is many, heavy, also can not appear because the extrusion makes the clearance between the upper and lower tray diminish and even disappear thereby lead to the contact surface laminating to be difficult to the condition of part together. In some preferred modes, the outer edge of the step surface is processed into a smooth cambered surface, so that the inner wall of the supporting foot of the lower tray cannot be greatly abraded during stacking.

In some preferred aspects, the thickness of the side walls of the stand-offs and the thickness of the tray body are the same. In some preferred schemes, the thickness of the side wall of the supporting foot is smaller than that of the tray body. In some preferred schemes, the step surface is arranged to protrude the original thickness of the side wall of the supporting foot. In some preferred schemes, the whole thickness of the step surface and the side wall of the supporting foot is not less than the thickness of the tray body, the step surface can increase the thickness of the side wall of the supporting foot to a certain extent, and therefore, the thickness of the side wall of the supporting foot except the step surface can be properly reduced.

In some preferred schemes, the step surface comprises a longitudinal surface and a transverse surface, the longitudinal surface is arranged along the height direction of the tray body, the transverse surface is connected with two adjacent longitudinal surfaces, or is connected with one longitudinal surface and the foot supporting side wall, and a continuous step surface is formed on the outer surface of the foot supporting side wall through a continuous connection mode of the longitudinal surface + the transverse surface + the longitudinal surface or the longitudinal surface + the transverse surface + the foot supporting side wall + the longitudinal surface.

In some preferred schemes, an inclination angle which is not more than 5 degrees is formed between the longitudinal surface and the height direction of the tray body, the inclination angle is required to be consistent with the inclination angle of the inner surface of the side wall of the supporting foot, the longitudinal surface has a certain inclination angle, so that an inserting guide can be formed, the hard contact during inserting is reduced, and the inserting between the upper supporting foot and the lower supporting foot is facilitated.

In some preferred schemes, the transverse face is an arc face bulging outwards, as mentioned above, the arc face can reduce abrasion in plugging, and because the supporting foot is a part of the exposed tray, the outer wall of the side wall of the supporting foot is easy to contact and collide with other objects in use, and if the outer wall has a sharp part, the other objects are easy to be damaged in use, therefore, the arrangement of the transverse face as the arc face can meet the use requirement.

In some preferred schemes, the width of the transverse plane is related to the inclination angle of the side wall of the foot support and the length of the longitudinal plane, generally speaking, 10-12 longitudinal planes are arranged on the height of the foot support, 10-12 transverse planes are correspondingly arranged, the length of the longitudinal plane is equal, the length and the radian of the transverse plane are also the same, the smaller the number of the longitudinal planes is, the larger the inclination angle of the side wall of the foot support is, the larger the size of the transverse plane is, and if the inclination angle of the longitudinal plane is large, the size of the transverse plane is correspondingly reduced, so as to achieve an optimal stress ratio. For example, in one embodiment, 10 longitudinal faces and 10 transverse faces are arranged, the inclination angle of the longitudinal faces is 3 degrees, and the radian diameter of the transverse faces is 1/3-1/4 of the length of the longitudinal faces, which is an implementation mode of the optimal stress ratio, at this time, the stress of the side walls of the supporting feet is most uniform, and is basically consistent with the stress of other parts of the tray body, and the local fracture phenomenon cannot occur.

In some preferred schemes, the second step surface calculated from the top end of the supporting foot is only a transverse surface or a longitudinal surface, and the only transverse surface or the only longitudinal surface is a cambered surface slightly protruding outwards, because the arrangement position of the first step is just at the connecting bending position of the supporting foot and the tray body, and the second step connected with the first step is arranged to be an excessive cambered surface, the stress concentration at the bending position can be effectively relieved, and the connecting between the bending position and the side wall of the supporting foot is excessive and smooth.

In some preferred schemes, a reinforcing rib is arranged on one side wall or side edge of the corner support leg and the edge support leg, the reinforcing rib extends downwards from the opening of the support leg to the middle position of the support leg, an inward concave part is formed on the inner surface of the side wall of the support leg, an outward convex part is formed on the outer surface of the side wall of the support leg, the reinforcing rib is used for balancing the phenomenon that the stress of each edge is uneven due to uneven distribution of the corner support leg and the edge support leg at the connection position with the reinforcing rib, for example, the corner support leg is taken as an example, the opening at the upper end of the corner support leg is communicated with the reinforcing rib at one corner facing to the central position, two side edges adjacent to the corner are also communicated with the reinforcing rib, so that the opening at the upper end of the support leg has three positions facing to the inside of the tray, a connection structure with the reinforcing rib is arranged, and the connection structure enables the upper end of the, the distribution of the compressive stress generated by the three parts under pressure is different from that of other parts, and the three parts are positioned at the half edge of the supporting foot close to the inner side of the tray, at the moment, a reinforcing rib is arranged at a corner of the supporting foot facing the outer side of the tray, so that the openings formed by the three parts in connection can be balanced, the distribution of the openings of the tray on the whole is relatively even, and the completely different pressure bearing capacities can not be shown in different directions under pressure. For another example, the edge support leg is provided with a reinforcing rib on one side facing the outermost side of the tray, and as described above, the opening formed by the other edge of the opening at the upper end of the edge support leg and the reinforcing rib is balanced in force. The reinforcing ribs are also typically located in the middle of the corner or edge, whether the corner or edge rest, since the connection to the reinforcing ribs is relatively evenly distributed. Correspondingly, the central support leg is connected with the reinforcing rib uniformly along the opening, so that reinforcing ribs are not required to be arranged.

In some preferred schemes, the upper opening of the reinforcing rib is larger than the lower opening of the reinforcing rib, on one hand, the structural design is matched with the shape of the support foot, because the upper opening of the support foot is larger than the size of the bottom plate, on the other hand, the size of the upper opening and the lower opening is more consistent with the stress transmission direction, and the pressure bearing of the support foot part is more facilitated.

In some preferred embodiments, the two ends of the connection between the reinforcing rib and the inner wall of the leg are formed with excessive round corners, and the lower end of the reinforcing rib and the inner wall of the leg must be connected, which requires an excessive shape, generally speaking, the connection is a line, but the hard connection of the line is easy to generate shape stress, and in order to relieve the stress concentration, the two ends of the connection can be formed with round corners. In some preferred modes, the whole bottom of the reinforcing rib adopts the circular transition without a straight line, and the circular transition is proved to be adopted to generate minimum shape stress on the side wall part of the supporting foot in practice.

In some preferred schemes, the outer wall of the reinforcing rib has a corner, the outer part of the corner forms an excessive cambered surface, relatively speaking, the part above the corner is inclined inwards by a small angle, and the part below the corner is inclined inwards by a large angle, so that a certain angle is formed between the part above the corner and the part below the corner, the corner part is used as the connection and the excessive part between the two sections, the height of the corner part is not less than the height of the step surface of one stage and not more than the height of the step surfaces of two stages, the corner part needs to have a certain size, otherwise, the excessive part is not firm but not too large, otherwise, the whole shape of the reinforcing rib is influenced and the effect is not achieved. The outer wall surface of the reinforcing rib is flat, on one hand, the insertion of the supporting foot part is convenient when the upper and lower trays are stacked, and on the other hand, the existence of the reinforcing rib can limit and guide the direction of the upper and lower trays when the upper and lower trays are stacked, so that the trays are stacked together and stored more neatly. In some preferred embodiments, the depth of the stiffening rib is greater than 1/2 and less than 2/3 of the depth of the stand-off.

In a fourth aspect of the invention, the invention provides a mould for preparing the moulded tray, which comprises an upper mould structure and a lower mould structure, wherein the upper mould structure and the lower mould structure open and close under the action of a moulding press so as to press and form the tray.

The upper die structure comprises an upper die base plate, an upper die template and an upper die hot pressing plate, the upper die base plate is used for being connected with a die press and fixing the whole upper die structure on the die press, the installation component of the upper surface connection die press of the upper die base plate, the upper die hot pressing plate is connected to the lower surface of the upper die base plate, the die heating pipes uniformly distributed in the same direction are arranged in the upper die hot pressing plate, the upper die template is connected to the lower surface of the upper die hot pressing plate, the upper die base plate is sleeved on the periphery of the upper die template and the upper die hot pressing plate, the foot supporting die core is installed in the inserting mode of the lower surface of the upper die template, the upper surface.

In some preferred schemes, the upper part of the pin supporting mold core is provided with a clamping convex block, the lower surface of the upper mold plate is provided with a clamping part used for being connected with the pin supporting mold core, the clamping part protrudes out of the lower surface of the upper mold plate, the clamping part is provided with an outer surface which is consistent with the shape of the inner wall of the pin supporting at the corresponding position, the middle part of the clamping part is provided with a recessed area which is matched with the clamping convex block, the pin supporting mold core is detachably arranged on the upper mold plate through the matching of the clamping convex block and the recessed area, and after the pin supporting mold core is arranged, the outer surface of the pin supporting mold core and the outer surface of the clamping part form a continuous smooth surface which is consistent with the shape of the inner surface of the side wall.

In some preferred schemes, the lower surface of the upper die plate is provided with a reinforcing rib male die for pressing the upper surface of the reinforcing rib at a part outside the clamping part, the reinforcing rib male die comprises a transverse connection type reinforcing rib male die for connecting the clamping part of the corresponding edge supporting foot and the clamping part of the corresponding corner supporting foot adjacent to the clamping part, a first oblique connection type reinforcing rib male die for respectively connecting the clamping part of each corresponding corner supporting foot and the clamping part of the corresponding center supporting foot, a second oblique connection type reinforcing rib male die for connecting the clamping parts of two adjacent corresponding edge supporting feet, a semi-partition type transverse reinforcing rib male die with one end connected with the clamping part of the corresponding edge supporting foot and the other end extending to the clamping part close to the corresponding center supporting foot, and a partition type arc-shaped reinforcing rib male die.

In some preferred schemes, the first inclined connection type reinforcing rib male die takes a clamping part corresponding to the central support leg as a center to form a large cross male die, the first inclined connection type reinforcing rib male die and the second inclined connection type reinforcing rib male die are crossed to form a small cross male die, a small triangle is formed between the small cross male die and the transverse connection type reinforcing rib male die corresponding to the position, and the partition type arc-shaped reinforcing rib male die is arranged in the small triangle area.

The reinforcing rib male dies are used for forming the upper surfaces of the reinforcing ribs on the tray, the cross sections of the convex parts of the reinforcing rib male dies are smooth arc surfaces, the inner surfaces of the formed reinforcing ribs are also smooth arc surfaces, the edge stress of the tray can be reduced to the maximum extent, the bearing capacity of the tray is improved, the arc-shaped reinforcing ribs are in a partition mode, the bearing capacity of the edge of the tray can be enhanced, and stress concentration areas can be prevented from being formed at the supporting feet of the tray.

In some preferred schemes, both sides of the upper die base plate are provided with connecting lugs, the connecting lugs are symmetrically distributed on the edges of both sides of the upper die base plate, the connecting lugs and the upper die base plate are integrally formed, mounting and connecting holes are formed in the connecting lugs, and the upper die base plate are detachably and fixedly connected through the connecting lugs. In some preferred modes, the outer edges of the two sides of the upper die base plate in the same direction as the connecting lugs are flush with the outer edges of the connecting lugs, the other two sides of the upper die base plate are located within the range of the upper die base plate, and the positions of the two sides meet the requirements that the upper die hot pressing plate is not covered, and the cooling liquid channel (at least one part of the cooling liquid channel) is exposed, so that the cooling liquid can be added into the cooling liquid channel from the part, if the size of the upper die base plate is too large, the cooling liquid channel cannot be exposed after installation, the cooling liquid cannot be added into the upper die base plate, or the position interference with a cooling liquid adding pipe can be caused.

In some preferred schemes, the pin supporting mold core comprises four corner pin supporting mold cores, a center pin supporting mold core and four edge pin supporting mold cores, wherein the length of the edge pin supporting mold core along the edge of the edge pin supporting mold core is larger than the length of the edge pin supporting mold core in the direction perpendicular to the edge pin supporting mold core, the shape of the edge pin supporting mold core is consistent with that of the edge pin supporting mold core, the cross section of the edge pin supporting mold core and the cross section of the edge pin supporting mold core are rectangular as a whole, the four corners of the rectangle are processed by circle guiding, the edge pin supporting mold core is inclined inwards from top to bottom, the inclined surface is an arc surface, in addition, part of the outer end of the edge pin supporting mold core is cut flat to form two cut surfaces with V-shaped interfaces, the outermost ends of the two cut surfaces are connected through the smooth arc surface, the part connected by the arc surface corresponds to the bottom groove of the edge pin supporting, the edge pin supporting mold core is provided with, the outer surface of the edge bulge is provided with an edge bend, the edge bend part is provided with a transition arc surface, and the edge bend is positioned in the middle of the whole bulge; the cross section of the corner supporting leg mold core is square as a whole, the four corners of the square are subjected to round guide treatment, the corner supporting leg mold core is inclined inwards from top to bottom gradually, the inclined plane is an arc surface, part of the outer end of the corner supporting leg mold core is cut flat to form two V-shaped cut planes on the interface, the outermost ends of the two cut planes are connected through a smooth arc surface, the part connected with the arc surface corresponds to the bottom groove of the corner supporting leg, one corner of the corner supporting leg mold core at the four corners is provided with a bulge matched with the reinforcing rib in shape, the bulge extends downwards to the 1/2-2/3 part of the height of the edge supporting leg mold core, the outer surface of the corner bulge is provided with a corner bend, the corner bend part is provided with an excessive arc surface, and the corner bend is located in the middle part of.

In some preferred schemes, an upper die heating channel is arranged on the upper die hot-pressing plate, the cross section of the upper die heating channel is square, and the side length of the cross section of the upper die heating channel is not less than the diameter of the die heating pipe, so that the die heating pipe can rotate in the upper die heating channel, the heat transfer is more uniform, and a certain gap is formed between the heating channel and the die heating pipe, so that the die heating pipe is convenient to replace.

In some preferred schemes, the both ends of mould heating pipe are equipped with the heating and connect, the heating connects including direct cover establishes the insulating cover at mould heating pipe both ends, be equipped with the trompil on the insulating cover, be equipped with in the insulating cover with heating pipe fixed connection's electricity connect, be equipped with two nut structures on the electricity, two nut structures include inside and outside two-layer nut, be equipped with double-deck gasket between inside and outside two-layer nut, thus, interval between inside and outside two-layer nut can be adjusted through swivel nut, thereby can be between double-deck gasket accessories such as centre gripping electric wire, make the electricity connect more firmly.

Lower die structure includes the lower mould bedplate, the lower mould bracing piece, lower mould hot pressing board and lower mould template, the upper end fixed connection of lower mould bracing piece is on the lower surface of lower mould bedplate, the lower extreme of lower mould bracing piece is equipped with the connecting seat, the connecting seat is used for being connected with the moulding press and fixes whole lower mould structure on the moulding press, the lower mould bracing piece can with connecting seat integrated into one piece, the upper end of lower mould bracing piece can be through pegging graft, forms such as joint are fixed, or can make with lower mould bedplate integrated into one piece, the top of lower mould bedplate is equipped with lower mould hot pressing board, the top of.

In some preferred schemes, a first lower die heating channel is arranged between the lower die hot pressing plate and the lower die template, a second lower die heating channel is arranged between the lower die seat plate and the lower die hot pressing plate, the first lower die heating channel and the second lower die heating channel have the same direction but are arranged in a staggered manner from top to bottom to form heating channel groups, as shown in the figure, each heating channel group comprises four heating channels, wherein two heating channels of the lower layer are all positioned in two heating channels of the upper layer, that is, the connecting line of each group of heating channels forms an inverted trapezoid, so that an upright trapezoid is formed between adjacent heating channel groups, and the arrangement mode makes the arrangement of the heating channels staggered from top to bottom, relatively speaking, the coverage area is wider, and more uniform.

In some preferred schemes, a mold heating pipe may be disposed in the heating channel, and the arrangement direction of the mold heating pipe in the lower mold structure is perpendicular to the arrangement direction of the mold heating pipe in the upper mold structure.

In some preferred schemes, the cross sections of the first lower die heating channel and the second lower die heating channel are both square, and the side length of the square cross section is not smaller than the diameter of the die heating pipe, so that the die heating pipe can rotate in the upper die heating channel, the heat transfer is more uniform, and a certain gap is formed between the heating channel and the die heating pipe, so that the die heating pipe can be conveniently replaced.

In some preferred schemes, the both ends of mould heating pipe are equipped with the heating and connect, the heating connects including direct cover establishes the insulating cover at mould heating pipe both ends, be equipped with the trompil on the insulating cover, be equipped with in the insulating cover with heating pipe fixed connection's electricity connect, be equipped with two nut structures on the electricity, two nut structures include inside and outside two-layer nut, be equipped with double-deck gasket between inside and outside two-layer nut, thus, interval between inside and outside two-layer nut can be adjusted through swivel nut, thereby can be between double-deck gasket accessories such as centre gripping electric wire, make the electricity connect more firmly.

In some preferred embodiments, the lower mold platen is provided with a stand-off opening corresponding to each stand-off of the pallet, for example, the pallet of the present invention has nine stand-offs, so that the lower mold platen is provided with corresponding nine stand-off openings through which the stand-off core can pass and protrude outside the lower mold platen when the mold is closed.

In some preferred schemes, the shape of the opening of the supporting foot is consistent with that of the supporting foot, and the inner wall of the opening is provided with a step surface which is consistent with the shape and the inclination of the outer surface of the side wall of the supporting foot. In some preferred schemes, the supporting foot mold core corresponding to each supporting foot passes through the corresponding opening, and the distance between the supporting foot mold core and the opening is consistent with the thickness of the side wall of the supporting foot.

In some preferred schemes, the lower die template only corresponds to one part of the length of the side wall of the supporting foot, and the supporting foot forming structure of the other part is positioned on the lower die hot pressing plate, that is, nine corresponding supporting foot openings are also arranged on the lower die hot pressing plate, and the inner wall of the supporting foot opening on the lower die hot pressing plate is also provided with a step surface which is consistent with the shape and the gradient of the outer surface of the side wall of the supporting foot. And part of the supporting leg mold core can extend into the supporting leg openings of the lower mold hot pressing plate during mold closing, and the distance between the supporting leg mold core and the inner walls of the supporting leg openings is consistent with the thickness of the side walls of the supporting legs.

In some preferred schemes, the size of the step surface in the supporting foot opening of the lower die template is gradually reduced from top to bottom, the size of the step surface in the supporting foot opening of the lower die hot pressing plate is gradually reduced from top to bottom, and the gradual changes of the supporting foot openings in the lower die template and the lower die hot pressing plate are respectively continuous and are continuously connected, the respective continuous means that the gradual changes of the supporting foot openings of the lower die template and the lower die hot pressing plate are continuous, the gradual changes of the connection part connecting the continuous lower die template and the lower die hot pressing plate are also continuous, so-called continuous means that the gradual changes are consistent, for example, the degree of reduction of the upper stage and the lower stage is consistent, if the partition is on the same stage of step surface, the continuous means that the partition is continuous and has no fault.

In some preferred schemes, a square or rectangular plane which is consistent with the shape of the outer surface of the bottom of the supporting foot is arranged at the bottom of the supporting foot opening of the lower die hot pressing plate, and the four corners of the plane can be rounded. In some preferred schemes, reinforcing rib concave dies which are consistent with the shapes of the reinforcing ribs on the tray supporting legs are arranged in the supporting leg openings of the lower die template and the corresponding supporting leg openings of the lower die hot pressing plate.

In some preferable schemes, the part above the bending part of the reinforcing rib corresponding to the support foot is formed in the lower die template, and the part below the bending part of the reinforcing rib corresponding to the support foot is formed in the lower die heating plate.

In some preferred schemes, the upper surface of the lower die template is provided with a reinforcing rib female die for pressing the lower surface of a reinforcing rib, the reinforcing rib female die comprises a transverse connection type reinforcing rib female die for connecting a supporting pin opening corresponding to the edge supporting pin and a supporting pin opening corresponding to the corner supporting pin adjacent to the supporting pin opening, a first oblique connection type reinforcing rib female die for connecting the supporting pin opening corresponding to the corner supporting pin and the supporting pin opening corresponding to the center supporting pin respectively, a second oblique connection type reinforcing rib female die for connecting the supporting pin openings corresponding to the two adjacent corresponding edge supporting pins, a semi-partition type transverse reinforcing rib female die with one end connected with the supporting pin opening corresponding to the edge supporting pin and the other end extending to the supporting pin opening close to the corresponding center supporting pin, and a partition type arc-shaped reinforcing rib female die.

In some preferred schemes, the first slant connection type reinforcing rib female die takes a clamping part corresponding to the central support foot as a center to form a large cross-shaped female die, the first slant connection type reinforcing rib female die and the second slant connection type reinforcing rib female die are crossed to form a small cross-shaped female die, a small triangle is formed between the small cross-shaped female die and the transverse connection type reinforcing rib female die corresponding to the position, and the partition type arc-shaped reinforcing rib female die is arranged in the small triangle area.

The reinforcing rib female dies are used for forming the lower surfaces of the reinforcing ribs on the tray, the cross sections of the concave parts of the reinforcing rib female dies are smooth cambered surfaces, the outer surfaces of the formed reinforcing ribs are also smooth cambered surfaces, the edge stress of the tray can be reduced to the maximum extent, the bearing capacity of the tray is improved, the arc-shaped reinforcing ribs are in a partition mode, the bearing capacity of the edge of the tray can be enhanced, and stress concentration areas can be prevented from being formed at the supporting feet of the tray.

The reinforcing rib female dies on the lower die template correspond to the reinforcing rib male dies on the upper die template one by one, and the distance between the reinforcing rib female dies and the reinforcing rib male dies is consistent with the thickness of the die plates when the dies are closed.

In some preferred embodiments, the thickness of the lower die plate is determined primarily by the need to form the lower surface of the pallet to accommodate the ribs, and therefore the thickness of the lower die plate need only exceed the depth of the ribs, but to meet certain strength requirements, the thickness of the lower die plate is typically twice the depth of the ribs, where the depth of the ribs is the vertical distance from the upper surface of the formed pallet to the lower surface of the ribs.

The invention has the beneficial effects that: the molded tray takes the environment-friendly material as the raw material, is molded by one-step pressing through molding equipment, and has the advantages of simple manufacturing method, convenient production, simple raw material acquisition, low cost and ecological environmental protection. More importantly, the mould pressing tray improves the foot supporting structure and the reinforcing rib structure on the basis of the existing tray, and the pressure bearing capacity of the mould pressing tray is greatly improved through the structural design under the condition that the production process of the mould pressing tray is not required to be changed.

Drawings

Fig. 1 is a front structural view of the present invention.

Fig. 2 is a bottom structure view of the present invention.

FIG. 3 is an internal schematic view of the corner bracket of the present invention.

FIG. 4 is an external schematic view of the corner bracket of the present invention.

FIG. 5 is an internal schematic view of the edge stand-off of the present invention.

FIG. 6 is an external view of the edge stand-off of the present invention.

Fig. 7 is an internal schematic view of the center stand of the present invention.

FIG. 8 is an external schematic view of the center stand of the present invention.

Fig. 9 is a schematic view of an arcuate reinforcing bar of the present invention.

Fig. 10 is a cross-sectional view of the present invention.

Fig. 11 is a partially enlarged view of fig. 10.

Fig. 12 is a cross-sectional view of another position of the present invention showing the cross-sectional structure of the reinforcing bar.

FIG. 13 is a schematic illustration of the upper die structure of the present invention.

FIG. 14 is a cross-sectional view of the upper die structure of the present invention.

FIG. 15 is a top view of the cope mold structure of the present invention.

Figure 16 is a bottom view of the upper die structure of the present invention.

FIG. 17 is a schematic view of the lower die structure of the present invention.

Fig. 18 is a side view of a lower die structure of the present invention.

FIG. 19 is a top view of the lower die structure of the present invention with the lower die platen removed.

FIG. 20 is a schematic view of a mold heating tube.

Fig. 21 is an enlarged view of the end of the mold heating tube.

Reference numbers in the figures: the tray comprises a tray body 1, a foot supporting structure 11, a reinforcing structure 12, a tray edge 13, a corner supporting foot 111, an edge supporting foot 112, a central supporting foot 113, a reinforcing rib 114, two ends 1142 of a joint 1141 of the reinforcing rib and the inner surface of the side wall of the supporting foot, a corner 1143, a side wall 115 of the supporting foot, a bottom plate 116 of the supporting foot, a step surface 117, a longitudinal surface 1171, a transverse surface 1172, a connecting reinforcing rib 121, a partition type reinforcing rib 122, a half partition type reinforcing rib 123, four cross reinforcing rib groups 124, a large cross reinforcing rib group 125, a square 126, four small triangular regions 127, a small non-closed triangular region 128, an upper mold structure 2, an upper mold plate 21, an upper mold backing plate 22, a connecting lug 221, a mounting and connecting hole 2211, an upper mold plate 23, a cooling liquid channel 231, a clamping position 232, a recessed region 2321, a reinforcing rib male mold 233, a transverse connecting type male mold reinforcing rib 233, a second slant connecting type reinforcing rib male die 2333, a half partition type transverse reinforcing rib male die 2334, a partition type arc reinforcing rib male die 2335, an upper die hot press plate 24, an upper die heating channel 241, a foot supporting die core 25, a clamping convex block 251, a corner foot supporting die core 252, a corner bulge 2521, a corner bend 25211, a central foot supporting die core 253, an edge foot supporting die core 254, a lower die structure 3, a lower die seat plate 31, a lower die support rod 32, a connecting seat 321, a lower die hot press plate 33, a foot supporting opening 331, a lower die plate 34, a foot supporting opening 341, a reinforcing rib female die 342, a transverse connecting type reinforcing rib female die 3421, a first slant connecting type reinforcing rib female die 3422, a second slant connecting type reinforcing rib female die 3423, a half partition type transverse reinforcing rib female die 3424, a partition type arc reinforcing rib female die 3425, a first lower die heating channel 35, a second lower die heating channel 36, the die heating tube 4, the heating connector 41, the insulating sleeve 411, the electric connector 412, the nut 413 and the double-layer gasket 414.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, and it should be noted that the embodiments are only specific descriptions of the implementation of the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 11, the present invention provides a molded pallet, which includes a pallet body 1, wherein a supporting leg structure 11 and a reinforcing structure 12 are arranged on the pallet body 1, the supporting leg structure 11 and the reinforcing structure 12 both protrude from a lower surface of the pallet body 1, the supporting leg structure 11 forms a supporting structure of the pallet body 1, and the supporting structure can make the pallet body 1 overhead, so that a certain distance is formed between the lower surface of the pallet body and a lower-layer object. If no stand-off structure exists, the lower surface of the tray body 1 can directly contact with the placing plane, or directly contact with the next layer of objects and/or the upper surface of the tray, during forking, stacking, etc., a large area of friction is created, since the pallet is typically loaded with heavy objects, if the friction area is increased, not only is the operation unfavorable, but also the contact surface of the tray is abraded to a great extent, the life of the tray is greatly reduced, meanwhile, the contact surfaces of the trays are likely to be tightly attached together due to heavy pressure without the overhead of a supporting structure, the state is kept for a long time, the gas between the two contact surfaces may be completely evacuated, and even the two surfaces merge with each other to cause the two surfaces to be tightly attached and difficult to separate, so that some overhead structure needs to be arranged on the tray body 1. The aerial structure can meet the requirement that when different trays of the same specification are stacked together, a part of surfaces of the aerial structure of the adjacent trays on the upper layer and the lower layer are in contact with each other and are not in contact with each other, for example, when the trays are stacked together, the supporting feet of the tray on the upper layer can be inserted into the supporting feet of the tray on the lower layer but can be only inserted into a part, such as the position of 1/3, therefore, a certain gap can be reserved inside the supporting foot structure and cannot be completely attached to each other, a certain gap can also exist between the upper tray and the lower tray, and the surfaces of the trays are prevented from being excessively attached to each other or attached to each other for a long time when the trays are stored.

As shown in fig. 1-2, the tray body 1 is a square as a whole, the four sides of the square, that is, the edges 13 of the tray, are all equal in length, so that the tray can be placed in any left-right or front-back direction, which makes the tray of the present invention different from the tray of non-square structure, some trays may be adjusted in length-width ratio, for the tray with different length, the fork-in can be performed only on one side of the long side or the short side, for example, in one-time pallet loading, the fork-in can be performed from the long side uniformly, the stacking direction of the tray itself has requirements, the fork-in distance is different for the tray with different length-width, and if the fork-in from the short side is short, the fork-in width requirement of the forklift can not be achieved, if the fork-in width requirement of the short side is met, the fork-in width is not matched with the fork-in width of the long side, the actual fork-in width of the long side is easily made smaller than that of the long side tray, resulting in instability during long side fork-in. In addition, if make circularly, from the angle of fork advance, circularly do not have the side direction limit, be difficult for looking for fork direction of advancing, the edge of circular tray all is the arc moreover, does not match with the direction of fork advance mechanism such as fork truck, has increased the fork and has advanced the distance, and this part distance that increases is effective distance again, is unfavorable for the fork to advance consequently, tray body 1 suitably sets up to the square.

As a preferred embodiment, the outer edges of the four corners of the square are inverted into an arc shape, so that the four corners of the tray body 1 are not sharp end parts but smooth arc end parts, the arc shape is beneficial to forming and the four corners are arranged into an arc shape, thereby reducing the abrasion and even cutting of the tray to surrounding objects and environments.

As shown in fig. 1 to 11, in the present invention, the reinforcing structure 12 of the pallet is mainly disposed on the surface of the pallet body 1, the reinforcing structure is mainly represented as a reinforcing rib, the reinforcing rib is a groove structure pressed on the surface of the pallet body, the reinforcing rib includes a connection type reinforcing rib 121, a partition type reinforcing rib 122 and a half partition type reinforcing rib 123 in terms of connection relation of the reinforcing rib and other structures, which are mainly distinguished from whether the reinforcing rib communicates with the stand bar, the reinforcing rib having both ends communicating with the stand bar is referred to as a connection type reinforcing rib, the reinforcing rib having both ends not communicating with the stand bar is referred to as a partition type reinforcing rib, one end communicating with the stand bar and the other end not communicating with the stand bar is referred to as a half partition type reinforcing rib, and it is preferable to simultaneously dispose the above three types of reinforcing ribs on one pallet in combination with disposition of the stand bar structure through stress research and analysis of the whole pallet, the reinforcing ribs are used for adjusting the pressure bearing capacity between the tray body and the supporting foot structures due to different structures and heights, and the reinforcing ribs of different types can be selected respectively according to different reinforcing modes required by different structures on the tray body, so that the effects of balancing the whole stress of the tray, improving the whole pressure bearing capacity of the tray and basically keeping the whole pressure bearing capacity of the tray to be consistent can be achieved.

As a preferred embodiment, the connecting, blocking and half-blocking reinforcing bars may be arranged in the manner shown in fig. 1. A semi-partition type reinforcing rib 123 is arranged between the edge supporting leg 112 and the central supporting leg 113, in this embodiment, one end of the semi-partition type reinforcing rib 123 is communicated with the edge supporting leg 112, and the other end extends to a position close to one side edge of the central supporting leg 113, in practice, one end of the semi-partition type reinforcing rib 123 may be connected with the side edge of the central supporting leg 113, and the other end extends to a position close to one side of the edge supporting leg 112, which is mainly considered in combination with other structures of the pallet, because the semi-partition type reinforcing rib 123 is mainly suitable for a situation that one supporting leg is connected with a reinforcing rib too much, which is not suitable for being connected with a reinforcing rib, but the area of the pallet body between the semi-partition type reinforcing rib and other supporting legs is large, and a reinforcing rib must be arranged, for example, in the case that the central supporting leg 113 is connected with four reinforcing ribs, the remaining position may cause the opening of the whole central supporting leg to be occupied by the reinforcing rib if, in this case, the connection between the central stand-off and the reinforcing bar is broken, and the reinforcing bar is extended to the vicinity of the central stand-off, so that the reinforcing effect of the reinforcing bar is not affected, and the connection distribution between the central stand-off and the reinforcing bar is reasonably arranged. In some preferred solutions, the semi-partitioned ribs divide the tray body equally into four small square sections.

As can be seen from the figure, the connecting reinforcing ribs 121 are respectively arranged between the corner supporting leg 111 and the central supporting leg 113 and between the edge supporting legs 112 on the adjacent sides, two connecting reinforcing ribs 121 of the part are intersected with each other pairwise to form four cross reinforcing rib groups 124, the four cross reinforcing rib groups are respectively positioned in four parts separated by the half-partition type reinforcing ribs, and connecting lines between the corner supporting leg and the central supporting leg at the opposite corners are positioned on the same straight line, so that a large cross reinforcing rib group 125 is formed integrally, the whole tray body is uniformly divided into four triangular parts by the large cross reinforcing rib group 125, the cross is a relatively stable reinforcing form, and the whole tray body is supported by a reinforcing structure through the combination of the whole large cross and four small cross parts. And, there are connection type stiffening ribs 121 between the edge stand-off 112 and the adjacent corner stand-off 111, these connection type stiffening ribs 121 connect four edges of the tray into a square 126, this square 126 makes all four corners located on the edge of the tray body linked as a whole, the body between stand-off and stand-off is strengthened and supported.

As shown in fig. 1, the cross structure in the small square divides the small square into four small triangular areas 127, wherein the edges of two small triangular areas 127 are sealed by the connecting reinforcing ribs 121 between the edge supporting legs 112 and the corner supporting legs 111 on the side of the tray to form a closed small triangular area, while the other two small triangular areas use the semi-partition reinforcing ribs 123 as the hypotenuses of the triangle to form a non-closed small triangular area 128, which is closer to the central part of the tray, on the one hand, the pressure-bearing area of the central part is large, the pressure can be uniformly distributed, and the supporting legs of the central part are only one central supporting leg, the whole structure is relatively uniform, the strength is relatively stable, but the closed small triangular area is close to the edge of the tray, the edge part belongs to a part where stress is easy to concentrate, and supporting feet of the edge part are distributed more densely, especially at a position close to a corner part, so that a reinforcing structure needs to be additionally added, and the pressure bearing capacity of the whole tray is closer to the same. Therefore, in some preferred schemes, in the closed small triangular area, the isolated reinforcing ribs are arranged, the isolated reinforcing ribs correspond to the closed small triangular area one by one, and the isolated reinforcing ribs mainly play a role in reinforcing the strength of the edge and the corner of the tray, particularly the strength of the closed small triangular area. In some preferred forms, the partition type reinforcing bars are arc-shaped reinforcing bars, and both ends of the arc-shaped reinforcing bars face both ends of the hypotenuse of the closed small triangular region, that is, both ends of the connective reinforcing bars located at the edge of the closed small triangular region are closed. In the prior art, there are also situations where similar arc-shaped reinforcing ribs are provided, for example, the arc-shaped reinforcing ribs are also provided in the trays which are equidistantly forked in the background art, but the arc-shaped reinforcing ribs in the background art are usually communicated with the support legs, in fact, not only the arc-shaped reinforcing ribs but also the reinforcing ribs of most trays in the prior art are communicated with the support legs, on one hand, this is a conventional design method, on the other hand, for the molding tray, if an area completely separated from other areas is provided, the difficulty of the molding process and the mold opening process is increased, because the molding raw materials in the independent areas cannot be communicated with other areas for balancing. The technical scheme of the invention has no difficulty, because the thickness of the reinforcing rib is consistent with the thickness of the tray, the size of the upper die and the lower die can be adjusted according to the shape, and in the invention, the section of the arc-shaped reinforcing rib is of a structure with a large upper part and a small lower part, and two ends of the arc-shaped reinforcing rib are in fillet transition, so that the die sinking is not influenced. Moreover, if the connecting reinforcing ribs are also adopted in the closed small triangular area, namely the reinforcing ribs are communicated with the corner supporting feet, as shown in the figure, the opening of the corner supporting feet facing the side in the tray is completely occupied by the connection of the reinforcing ribs, and in experiments and practical use, the reinforcing structure can cause stress concentration of the supporting feet, the connecting parts of the supporting feet and the reinforcing ribs are easy to brittle fracture, and the strength which can be borne by the whole tray is reduced by about 10%. Therefore, the closed small triangular area is reinforced by adopting the partition type reinforcing ribs. In some preferred schemes, the distance between the two ends of the partition type reinforcing rib and the edge of the opening at the upper end of the supporting foot is not larger than the width of the reinforcing rib, and the reinforcing rib needs to be distributed on the surface of the tray body as much as possible, so that the tail end of the reinforcing rib still needs to be close to the supporting foot part, and if the reinforcing rib cannot penetrate through, the reinforcing effect on a certain area cannot be achieved.

In some preferred modes, the transverse partition type reinforcing ribs positioned at the edges of the tray are provided with notches, and the notches can play a role in facilitating the drawing and can also be used as clamping positions in the carrying process of the tray.

The supporting leg structure 11 of the present invention can be divided into a corner supporting leg 111, an edge supporting leg 112 and a center supporting leg 113, four corner supporting legs 111 are respectively arranged on four corners of a square, edge supporting legs 112 are respectively arranged on four sides of the square, the edge supporting leg 112 is located at the middle position of two adjacent corner supporting legs 111, and a center supporting leg is further arranged at the center position of the square tray body, so that a relatively stable structure of nine supporting legs is formed.

As can be seen from fig. 1, the overall shape of the central support leg 113 is also a square, where the square refers to the shape of the bottom plate of the central support leg, the size and shape of the bottom plate of the corner support leg 111 and the bottom plate of the central support leg 113 are the same, and the main difference between the corner support leg 111 and the central support leg 113 is that the corner support leg 111 is provided with a reinforcing rib 114, the bottom plate of the edge support leg 112 is rectangular, the rectangular side in the same direction as the side of the rectangle is the long side, and the other two sides are the short sides, in order to prevent the tray from having a sharp end, the four corners of the above-mentioned square and rectangle are rounded, and the edge support leg is set to be rectangular because the position between the edge support leg and the corner support leg is the forking position, the width of the forking position must be matched with the forking part of the forking mechanism, because the corner support leg cannot change in length, and the corner support leg is enlarged as a whole, the strength of the leg rest and even the entire pallet may be affected, and the length of the edge leg (i.e., the length along the side of the side) may be adjusted to adjust the distance between the corner leg and the edge leg, and may extend or increase from the edge leg to the corner legs on both sides to adjust the distance between the edge leg and the corner leg so that the fork-in distance of the pallet itself may meet the fork-in requirement.

The invention also has limited shape of the supporting leg, the side wall of the supporting leg is inclined inwards, so that the supporting leg is in a shape with a big top and a small bottom, thus, for the tray with the same specification, the size of the outermost end of the supporting leg is obviously smaller than the size of the opening of the tray, the supporting leg on the upper layer can be inserted into the supporting leg on the lower layer, but because the wall thickness of the tray exists, and the opening of the supporting leg is larger, the supporting leg of the upper layer tray can only be partially inserted into the supporting leg of the lower layer tray, and can not be completely attached.

As shown in fig. 3-8, the stand-off portion includes a stand-off side wall 115 and a stand-off base 116. In this embodiment, the outer surface of the footrest base plate 116 is a plane, and both sides of the inner surface are inclined toward the middle portion, and a lowest portion is formed at the middle portion. Alternatively, in this embodiment, the lowest portion is a U-shaped groove, and in some cases, the lowest portion may also be a V-groove. U-shaped recess for V-arrangement recess, the groove width at bottommost will be wider a little for the groove width, when the tray width is great, can select for use U-shaped recess, because the tray width is big, relatively speaking, the size of support foot also can be corresponding big, under the little condition of tray thickness variation, if still adopt V-arrangement recess, it is possible that the support foot lateral wall at support foot bottom recess both sides can be thicker, if the thickness of support foot lateral wall bottom and other positions differs too greatly, be unfavorable for the holistic atress of support foot even, consequently, when the length of a side of tray exceeds 900mm or support foot and the V-arrangement recess the width of a groove in the direction on the unanimity and exceed 60mm, adopt U-arrangement recess. In some preferred forms, the width of the bottom of the U-shaped groove does not exceed 1/2 the width of the bottom of the tray, and the U-shaped groove should not be too wide, which would otherwise affect the strength of the stand-off base and the junction of the stand-off base and the stand-off side walls. In some preferred embodiments, the direction of the groove is the same as the direction of one of the side edges of the tray. In some preferred embodiments, the direction of the groove is at an angle, such as 15 °, 30 °, 45 ° or 60 °, to the direction of one of the sides of the tray, and the angle can be adjusted according to the depth of the stand-off and the angle of inclination of the stand-off side walls. In some preferred modes, when the inclination angle of the side wall of the supporting foot exceeds 30 °, the inclination of the groove can be properly adjusted, because if the inclination angle of the side wall of the tray is large, the lateral compressive stress and the shear stress applied to the side wall of the tray become large, when the inner surface of the bottom plate of the supporting foot is a groove, the inner surface of the side wall of the supporting foot must have inclined planes matched with the two sides of the groove, and the force applied to the inner surface of the supporting foot is completely distributed on the inclined planes, so that the stress applied to the side wall of the supporting foot is concentrated on the two sides with the inclined planes, the stress applied to the supporting foot part is not uniform, if the groove direction of the inner surface of the bottom plate of the supporting foot is properly changed, the inclined planes are twisted along the change of the groove direction, and thus, all parts of the side wall of the supporting foot can bear lateral component force, so that the stress applied to the supporting foot part is relatively, the situation of local overlarge stress can not occur. In some preferred modes, the directions of the grooves in different support legs in the same arrangement can be different, so that the divergence of stress distribution is better, and stress concentration is avoided.

The above-described structure of the bottom plate is advantageous for the stripping of the upper mold, but in practice, other types of the bottom plate of the stand-off may be used, for example, the inner surface and the outer surface of the bottom plate 116 are both flat. Alternatively, the outer surface of the footrest floor 116 is planar and the inner surface has a slope.

In some preferred embodiments, the thickness of the base 116 corresponds to the thickness of the pallet body 1, and the thickness of the base should be the minimum thickness of the base, i.e., the thickness of the base excluding the recessed portions, and the remaining thickness of the base. In this embodiment, as shown in fig. 10, the thickness of the stand bottom plate 116 is not smaller than the thickness of the tray body 1. The foot supporting bottom plate is the position for bearing stress and pressure concentration on the whole tray, so that the thickness of the foot supporting bottom plate must be ensured, and the integral supporting strength of the tray can be ensured. Even more, the thickness of the joint of the foot supporting bottom plate and the foot supporting side wall is larger than that of the foot supporting bottom plate, and the joint of the foot supporting bottom plate and the foot supporting side wall needs larger thickness to ensure the strength because the joint is structurally bent and the bent part is usually a stress concentration part. In this embodiment, the inner wall of the joint between the stand-off base 116 and the stand-off side wall 115 is a smooth transition arc surface, and the smooth transition arc surface can counteract the stress concentration of a part of the bending part.

As shown in fig. 2, 4, 6 and 8, a step surface 117 is arranged on the outer surface of the supporting leg side wall 115, when the trays are stacked together, the supporting leg of the upper tray is inserted into the supporting leg of the lower tray, therefore, the step surface is arranged, the contact surface of the supporting leg of the upper and lower trays can be reduced, thereby reducing the contact friction when the upper and lower trays are stacked, in addition, the continuous step surface can form an uneven shape on the outer surface of the supporting leg side wall, the uneven shape inevitably has a peak shape and a valley shape, the valley shape is recessed inwards, the recessed valley shape can form an air-permeable gap between the trays, thus, even if the stacking quantity is large, the weight is large, the condition that the contact surface is difficult to separate because the gap between the upper and lower trays is reduced or even disappears due to extrusion can not occur. As shown in fig. 4, 6 and 8, the outer edge of the step surface is processed into a smooth arc surface, so that the inner wall of the supporting leg of the lower tray is not greatly abraded during stacking.

The thickness of the stand-off side wall 115 and the thickness of the pallet body 1 are the same. Alternatively, the thickness of the stand-off side wall 115 is smaller than the thickness of the tray body 1, but the step surface 117 is provided to protrude from the original thickness of the stand-off side wall 115, and the thickness of the whole of the step surface 117 and the stand-off side wall 115 is not smaller than the thickness of the tray body 1, and the step surface 117 can increase the thickness of the stand-off side wall 115 to some extent, so that the thickness of the stand-off side wall 115 excluding the step surface portion can be appropriately reduced.

As shown in fig. 11, the step surface 117 includes a longitudinal surface 1171 and a transverse surface 1172, the longitudinal surface 1171 is disposed along the height direction of the tray body, the transverse surface 1172 connects two adjacent longitudinal surfaces, or connects one longitudinal surface 1171 with the outer surface of the stand-off side wall 115, and a continuous step surface is formed on the outer surface of the stand-off side wall by a continuous connection manner of the longitudinal surface + the transverse surface + the longitudinal surface, or the longitudinal surface + the transverse surface + the stand-off side wall + the longitudinal surface.

The longitudinal surface 1171 and the height direction of the tray body 1 form an inclination angle which is not more than 5 degrees, the inclination angle is required to be consistent with the inclination angle of the inner surface of the side wall of the supporting foot, the longitudinal surface has a certain inclination angle, so that the inserting guide can be formed, the hard contact during inserting is reduced, and the inserting between the upper supporting foot and the lower supporting foot is facilitated.

The transverse surface 1172 is an arc surface bulging outwards, as mentioned above, the arc surface can reduce abrasion during insertion, and since the supporting foot is an exposed part of the tray, the outer wall of the side wall of the supporting foot is easy to contact and collide with other objects during use, and if the outer wall has a sharp part, other objects are easy to be damaged during use, so that the transverse surface is set to be the arc surface, which is more in accordance with the use requirement.

The width of the transverse plane 1172 is related to the inclination angle of the side wall 115 of the stand-off and the length of the longitudinal plane, for example, in this embodiment, 10 to 12 longitudinal planes are arranged at the height of one stand-off, 10 transverse planes 1172 and 11 longitudinal planes 1171 are correspondingly arranged, the length of the longitudinal planes 1171 is equal, the length and the radian of the transverse planes 1172 are also equal, the smaller the number of the longitudinal planes is, the larger the inclination angle of the side wall of the stand-off is, the larger the size of the transverse plane is, and if the inclination angle of the longitudinal plane is large, the size of the transverse plane is correspondingly reduced, so as to achieve an optimal stress ratio. For example, in one embodiment, 10 longitudinal faces and 10 transverse faces are arranged, the inclination angle of the longitudinal faces is 3 degrees, and the arc diameter of the transverse face 1172 is 1/3-1/4 of the length of the longitudinal face 1171, which is an implementation mode of the optimal force matching, and the force on the side wall of the supporting foot is the most uniform and basically consistent with the force on other parts of the tray body, so that the local fracture phenomenon cannot occur.

As shown in fig. 11, the second step surface calculated from the top end of the supporting foot is only a transverse surface or a longitudinal surface, and the only transverse surface or the only longitudinal surface is a slightly outward convex arc surface, because the setting position of the first step is just at the connecting bending position of the supporting foot and the tray body, and the second step connected with the first step is set to be an excessive arc surface, the stress concentration at the bending position can be effectively relieved, and the connecting between the bending position and the side wall of the supporting foot is excessive and smoother.

As shown in fig. 4 and 6, a reinforcing rib 114 is provided on one side wall or side edge of the corner support leg and the edge support leg, the reinforcing rib 114 extends downward from the opening of the support leg to the middle position of the support leg, the reinforcing rib 114 forms an inward concave portion on the inner surface of the side wall 115 of the support leg, and forms an outward protruding portion on the outer surface of the side wall 115 of the support leg, the reinforcing rib 114 is used for balancing the phenomenon that the stress on each edge is uneven due to uneven distribution at the connection part of the corner support leg and the edge support leg with the reinforcing rib, for example, the corner support leg is taken as an example, the upper opening of the corner support leg is communicated with the reinforcing rib at one corner facing the center position, two side edges adjacent to the corner are also communicated with the reinforcing rib, so that the upper opening of the corner support leg has three positions facing the inside of the pallet, a connection structure with the reinforcing rib is provided, and the connection structure makes the upper end of the support leg, the distribution of the compressive stress generated by the three parts under pressure is different from that of other parts, and the three parts are positioned at the half edge of the supporting foot close to the inner side of the tray, at the moment, a reinforcing rib is arranged at a corner of the supporting foot facing the outer side of the tray, so that the openings formed by the three parts in connection can be balanced, the distribution of the openings of the tray on the whole is relatively even, and the completely different pressure bearing capacities can not be shown in different directions under pressure. For another example, the edge support leg is provided with a reinforcing rib on one side facing the outermost side of the tray, and as described above, the opening formed by the other edge of the opening at the upper end of the edge support leg and the reinforcing rib is balanced in force. The reinforcing ribs are also typically located in the middle of the corner or edge, whether the corner or edge rest, since the connection to the reinforcing ribs is relatively evenly distributed. Correspondingly, the central support leg is connected with the reinforcing rib uniformly along the opening, so that reinforcing ribs are not required to be arranged.

As shown in FIGS. 3 and 5, the upper openings of the reinforcing ribs 114 are larger than the lower openings of the reinforcing ribs, on one hand, the structural design is matched with the shape of the support foot, because the upper openings of the support foot are larger than the size of the bottom plate, on the other hand, the sizes of the upper openings and the lower openings are more consistent with the stress transmission direction, and the pressure bearing of the support foot part is more facilitated.

As shown in fig. 3 and 5, the two ends 1142 of the joint 1141 between the stiffener 114 and the inner surface of the leg sidewall 115 are formed with an excessive radius, and the lower end of the stiffener and a certain portion of the inner wall of the leg must be connected, which requires an excessive shape, and generally, the joint 1141 is a line, but the hard connection of the line is likely to generate shape stress, and the two ends of the joint may be formed with a rounded shape in order to relieve the stress concentration. In some preferred embodiments, the entire bottom of the reinforcing rib 1141 is rounded instead of straight lines, and practice proves that the rounded transition has minimum shape stress on the side wall of the supporting leg, but all rounded corners are only suitable for supporting leg portions with smaller size, and if the supporting leg portions are larger in size, the rounded corners cannot be adopted completely, which results in an enlarged length, so that the combination of lines and rounded corners can be adopted under the condition that the size of the supporting leg portions is larger.

As shown in fig. 4 and 6, the outer wall of the reinforcing rib 114 has a corner 1143, the outer part of the corner 1143 forms an excessive arc surface, relatively speaking, the portion of the reinforcing rib above the corner 1143 is inclined inward by a small angle, and the portion of the reinforcing rib below the corner 1143 is inclined inward by a large angle, so that there is a certain angle between the portion above the corner and the portion below the corner, the corner portion is used as a connection and an excess between the two sections, the height of the corner portion is not less than the height of the one-stage step surface and not more than the height of the two-stage step surface, the corner portion needs to have a certain size, otherwise the excess portion is not firm, but not too large, otherwise the overall shape of the reinforcing rib is affected, and the effect of the reinforcing rib is not achieved. As can be seen from the figure, the outer wall surface of the reinforcing rib 114 is flat, on one hand, the purpose is to facilitate the insertion of the supporting foot part when the upper and lower layers of trays are stacked, and on the other hand, the existence of the reinforcing rib can limit and guide the direction when the upper and lower layers of trays are stacked, so that the trays are stacked together and stored more orderly. In some preferred embodiments, the depth of the stiffening rib is greater than 1/2 and less than 2/3 of the depth of the stand-off.

Different parts of the tray (referred to as tray A in test data) and the tray (referred to as tray B in test data) in the background art are respectively selected for carrying out the compression test.

The test sites included: a tray middle portion (referred to simply as a portion a in the test data), an edge stand-off (referred to simply as a portion b in the test data), and a corner stand-off (referred to simply as a portion c in the test data).

The test subjects included: tray A100, tray B100. The average value was calculated from the test data of each tray as the final test result.

The average load carrying capacity of the test results is shown in the following table:

compression test 1: critical static load (kg) for fracture or deformation

Tray type	Site a	Site b	Site c
				Tray A	6070	6105	6190
Tray B	6075	4650	3540

Compression test 2: critical dynamic load (kg) for fracture or deformation

Tray type	Site a	Site b	Site c
				Tray A	4220	4120	4315
Tray B	4210	3320	2980

From the experimental data, it can be seen that, in both the dynamic and static conditions, the performance of the pallet a and the pallet B is almost similar in the middle (a part), but the pressure-bearing capacity is very different, by an order of magnitude, between the edge stand-off position (B part) and the corner stand-off position (c part). In tests, it was found that, for the pallet B, i.e. the pallet before the modification, whether the deformation occurred first with the increase of the load, it was generally the location c, which may also be broken directly in some tests, and more than 80 pallets were present at the connection of the arc-shaped reinforcing ribs and the bracket openings at the broken and deformed locations of the location c. The load bearing capacity of the region b is slightly greater than that of the region c, but generally, after the region c is deformed or broken, the region b is deformed or broken immediately. More than 70 tray fracture and deformation at the position b appear at the connection of the reinforcing rib and the inner wall of the bracket. Therefore, the design of the tray B at the two positions is not reasonable, and the performance of the tray B is improved after the improvement of the invention, so that the existing problems are solved.

As shown in fig. 13 to 20, the present invention provides a mold for preparing the above molded pallet, comprising an upper mold structure 2 and a lower mold structure 3, wherein the upper mold structure 2 and the lower mold structure 3 are opened and closed by a molding press to press-mold the pallet.

The upper die structure 2 comprises an upper die seat plate 21, an upper die base plate 22, an upper die template 23 and an upper die hot pressing plate 24, wherein the upper die seat plate 21 is used for being connected with a die press and fixing the whole upper die structure 2 on the die press, the upper surface of the upper die seat plate 21 is connected with a mounting component (not shown in the figure) of the die press, the lower surface of the upper die seat plate 21 is fixedly connected with the upper die hot pressing plate 24, a plurality of die heating pipes 4 uniformly distributed in the same direction are arranged in the upper die hot pressing plate 24, the lower surface of the upper die hot pressing plate 24 is fixedly connected with the upper die template 22, the upper die base plate 23 is sleeved on the peripheries of the upper die template 22 and the upper die hot pressing plate 24, a foot supporting die core 25 can be installed on the lower surface of the upper die template 22 in an inserting mode, a cooling liquid channel 231 is arranged on the upper, since the cooling is mainly directed to the upper die hot press plate 24.

As shown in fig. 2, the upper portion of the pin-holding mold core 25 is provided with a clamping protrusion 251, the lower surface of the upper mold plate 23 is provided with a clamping portion 232 for connecting with the pin-holding mold core 25, the clamping portion 232 protrudes from the lower surface of the upper mold plate 22, furthermore, the clamping part 232 has an outer surface (side surface) which is consistent with the shape of the inner wall of the supporting foot at the corresponding position, the clamping part 232 can also be used as a part of the forming during the mould pressing, therefore, the side of the clamping portion also needs to have a proper shape, the middle of the clamping portion 232 is provided with a recessed area 2321 matched with the clamping projection 251, the pin-holding mold core 25 is detachably mounted on the upper mold plate 22 through the matching of the clamping projection 251 and the recessed area 2321, and after the pin-holding mold core 25 is mounted, the outer surface of the clamping part 232 and the outer surface of the outer surface form a continuous smooth surface, and the shape of the continuous smooth surface is consistent with the shape of the inner surface of the side wall of the supporting foot corresponding to the supporting foot mold core.

As shown in fig. 16, a part of the lower surface of the upper die plate 23 other than the clamping portion is provided with a reinforcing rib male die 233 for pressing the upper surface of the reinforcing rib, the reinforcing rib male die 233 includes a transverse connection type reinforcing rib male die 2331 connecting the clamping portion of the corresponding edge stand bar and the clamping portion of the corresponding corner stand bar adjacent thereto, a first oblique connection type reinforcing rib male die 2332 connecting the clamping portion of each corresponding corner stand bar and the clamping portion of the corresponding center stand bar, respectively, a second oblique connection type reinforcing rib male die 2333 connecting the clamping portions of two adjacent corresponding edge stand bars, a half-partition type transverse reinforcing rib male die 2334 having one end connected to the clamping portion of the corresponding edge stand bar and the other end extending to the clamping portion close to the corresponding center stand bar, and a partition type arc reinforcing rib male die 2235.

The first diagonal connection type reinforcing rib male die 2332 forms a large cross-shaped male die with the clamping part corresponding to the central support leg as the center, the first diagonal connection type reinforcing rib male die and the second diagonal connection type reinforcing rib male die are crossed to form a small cross-shaped male die, a small triangle is formed between the small cross-shaped male die and the transverse connection type reinforcing rib male die 2331 corresponding to the position, and the partition type arc-shaped reinforcing rib male die 2335 is arranged in the small triangle area.

The reinforcing rib male dies are used for forming the upper surfaces of the reinforcing ribs on the tray, the cross sections of the convex parts of the reinforcing rib male dies are smooth arc surfaces, the inner surfaces of the formed reinforcing ribs are also smooth arc surfaces, the edge stress of the tray can be reduced to the maximum extent, the bearing capacity of the tray is improved, the arc-shaped reinforcing ribs are in a partition mode, the bearing capacity of the edge of the tray can be enhanced, and stress concentration areas can be prevented from being formed at the supporting feet of the tray.

The two sides of the upper die base plate 22 are provided with the connecting lugs 221, the connecting lugs 221 are symmetrically distributed on the edges of the two sides of the upper die base plate 22, the connecting lugs 221 and the upper die base plate 22 are integrally formed, the connecting lugs 221 are provided with mounting connecting holes 2211, and the upper die base plate 21 and the upper die base plate 22 are detachably and fixedly connected through the connecting lugs 221. For the convenience of fixing the engaging lug 221, the outer edges of the two sides of the upper mold seat plate 21 and the engaging lug 221 in the same direction are flush with the outer edges of the engaging lug 221, the other two sides of the upper mold seat plate 21 are located within the range of the upper mold base plate 22, and the positions of the two sides meet the requirement that the upper mold hot press plate 25 is covered and the cooling liquid channel 231 (at least one part of the cooling liquid channel) is exposed, so that the cooling liquid can be added into the cooling liquid channel 231 from the part, if the size of the upper mold seat plate 21 is too large, the cooling liquid channel 231 cannot be exposed after installation, the cooling liquid cannot be added into the upper mold seat plate, or the cooling liquid can interfere with the position of the cooling liquid adding pipe.

As shown in fig. 16, the pin supporting mold core 25 includes four corner pin supporting mold cores 252, a center pin supporting mold core 253 and four edge pin supporting mold cores 254, wherein the length of the edge pin supporting mold core 254 along the edge of the edge pin supporting mold core is greater than the length of the edge pin supporting mold core in the direction perpendicular to the edge pin supporting mold core, the shape of the edge pin supporting mold core 254 is consistent with that of the edge pin supporting mold core 254, the cross section of the edge pin supporting mold core 254 is rectangular as a whole, the four corners of the rectangle are rounded, the edge pin supporting mold core 254 is inclined inward from top to bottom, the inclined surface is an arc surface, and a part of the outer end of the edge pin supporting mold core 254 is cut flat to form two cut surfaces with a V-shaped interface, the outermost ends of the two cut surfaces are connected by a smooth arc surface, the part of the arc surface connection corresponds to the bottom groove of the edge pin supporting mold core, the edge pin supporting mold core is provided with an edge protrusion matching the shape, the outer surface of the edge bulge is provided with an edge bend, the edge bend part is provided with a transition arc surface, and the edge bend is positioned in the middle of the whole bulge; the cross section of the corner pin support mold core is square as a whole, the four corners of the square are rounded, the corner pin support mold core 252 is inclined inwards from top to bottom, the inclined surface is an arc surface, in addition, a part of the outer end of the corner pin support mold core, the inclined surface is flattened to form two tangent planes with V-shaped interfaces, the outermost ends of the two tangent planes are connected through a smooth arc surface, the part where the arc surface is connected corresponds to the bottom groove of the corner pin support, the corner pin support mold core 252 is provided with a corner protrusion 2521 matched with the reinforcing rib 114 in shape at one of the four corners, the corner protrusion 2521 extends downwards to the position 1/2-2/3 of the height of the edge pin support mold core 254, the outer surface of the corner protrusion 2521 is provided with a corner bend 25211, the corner bend 25211 part is provided with an excessive arc surface, and the corner bend 25211 is positioned at the middle part of the.

The upper die heating channel 241 is arranged on the upper die hot-pressing plate 24, the cross section of the upper die heating channel 241 is square, the length of the side of the cross section of the upper die heating channel 241 is not smaller than the diameter of the die heating pipe 4, therefore, the die heating pipe 4 can rotate in the upper die heating channel 241, heat transfer is more uniform, and a certain gap is formed between the upper die heating channel 241 and the die heating pipe 4, so that the die heating pipe 4 can be conveniently replaced.

As shown in fig. 20-21, heating joints 41 are disposed at two ends of the mold heating pipe 4, each heating joint 41 includes an insulating sleeve 411 directly sleeved at two ends of the mold heating pipe 4, an opening is disposed on the insulating sleeve 411, an electrical joint 412 fixedly connected with the mold heating pipe 4 is disposed in the insulating sleeve 411, a double-nut structure is disposed on the electrical joint 412, the double-nut structure includes an inner layer nut 413 and an outer layer nut 413, a double-layer gasket 414 is disposed between the inner layer nut 413 and the outer layer nut 413, threads are turned on positions where the electrical joint 412 is connected with the rest nut 413, and thus, a distance between the inner layer nut 413 and the outer layer nut 413 can be adjusted by rotating the nuts, so that accessories such as electric.

As shown in fig. 17, the lower mold structure 3 includes a lower mold base plate 31, a lower mold support rod 32, a lower mold hot press plate 33 and a lower mold template 34, the upper end of the lower mold support rod 32 is fixedly connected to the lower surface of the lower mold base plate 31, the lower end of the lower mold support rod 32 is provided with a connecting seat 321, the connecting seat 321 is used for connecting with a molding press and fixing the whole lower mold structure on the molding press, the lower mold support rod 32 can be integrally formed with the connecting seat 321, the upper end of the lower mold support rod 32 can be fixed on the lower mold base plate 31 in the form of plugging, clamping, and the like, or can be integrally formed with the lower mold base plate 31, the lower mold hot press plate 33 is.

As shown in fig. 18, a first lower mold heating channel 35 is disposed between the lower mold hot press plate 33 and the lower mold plate 34, a second lower mold heating channel 36 is disposed between the lower mold base plate 31 and the lower mold hot press plate 33, the first lower mold heating channel 35 and the second lower mold heating channel 36 are in the same direction but are arranged in a staggered manner to form heating channel groups 37, as shown in the figure, each heating channel group 37 includes four heating channels, wherein the two heating channels of the lower layer are located in the two heating channels of the upper layer, that is, the connecting line of each heating channel group forms an inverted trapezoid, so that an upright trapezoid is formed between the adjacent heating channel groups, and the arrangement of the heating channels is staggered in a staggered manner to be relatively wider in coverage and more uniform.

The mould heating pipe arranging device comprises a lower mould structure, a first lower mould heating channel and a second lower mould heating channel of the lower mould structure are the same as the upper mould structure, the mould heating pipe 4 can be arranged in the first lower mould heating channel and the second lower mould heating channel of the lower mould structure, the model of the mould heating pipe 4 can be the same as that of the upper mould structure, the arranging direction of the mould heating pipe 4 in the lower mould structure is perpendicular to the arranging direction of the mould heating pipe 4 in the upper mould structure 2, and under some conditions, the arranging direction of the mould heating pipe 4 in the lower mould structure can be the same as that of the.

As shown in fig. 18, the cross-sections of the first and second lower mold heating channels are both square, and the side length of the square cross-section is not smaller than the diameter of the mold heating tube, so that the mold heating tube can rotate in the upper mold heating channel, so that the heat transfer is more uniform, and a certain gap is formed between the heating channel and the mold heating tube, so that the mold heating tube can be replaced conveniently, and in some cases, the heating channel can also adopt the same cross-sectional shape as the mold heating tube.

As shown in fig. 20-21, heating joints 41 are disposed at two ends of the mold heating pipe 4, each heating joint 41 includes an insulating sleeve 411 directly sleeved at two ends of the mold heating pipe 4, an opening is disposed on each insulating sleeve, an electric joint 412 fixedly connected with the mold heating pipe 4 is disposed in each insulating sleeve 411, a double-nut structure is disposed on each electric joint 412, each double-nut structure includes an inner layer nut 413 and an outer layer nut 413, a double-layer gasket 414 is disposed between each inner layer nut 413 and each outer layer nut 413, and thus, a distance between each inner layer nut 413 and each outer layer nut 413 can be adjusted through rotating the corresponding nut 413, so that accessories such as an electric wire can be.

The lower mold plate 34 is provided with a stand-off opening 341, and the stand-off opening 341 corresponds to each stand-off of the pallet, for example, nine stand-offs are provided in the pallet of the present invention, so that the corresponding nine stand-off openings 341 are provided in the lower mold plate 34, and the stand-off mold core 25 can pass through the stand-off openings 341 and protrude outside the lower mold plate 34 when the mold is closed.

The shape of the leg support opening 341 is the same as the shape of the leg support, and the inner wall of the leg support opening 341 is provided with a step surface having the same shape and inclination as the outer surface of the side wall of the leg support. The supporting leg mold core 25 corresponding to each supporting leg passes through the corresponding supporting leg opening 341, and the distance between the supporting leg mold core 25 and the supporting leg opening 341 is consistent with the thickness of the supporting leg side wall 115.

The lower die plate 34 is provided with a part corresponding to the length of the leg side wall 115, and the other part of the leg forming structure is located on the lower die hot press plate 33, that is, the lower die hot press plate 33 is also provided with nine leg openings 331 corresponding thereto, as shown in fig. 19, and the inner wall of the leg opening 331 of the lower die hot press plate 33 is also provided with a step surface conforming to the outer surface shape and inclination of the leg side wall. When the mold is closed, a part of the stand-off core 25 can extend into the stand-off openings 331 of the lower mold hot press plate 33, and the distance from the inner walls of the stand-off openings 331 is consistent with the thickness of the stand-off side walls 115.

In the foot supporting opening 341 of the lower die template 34, the size of the step surface is gradually reduced from top to bottom, in the foot supporting opening 331 of the lower die hot pressing plate 33, the size of the step surface is gradually reduced from top to bottom, and the gradual changes of the foot supporting openings in the lower die template 34 and the lower die hot pressing plate 33 should be respectively continuous and continuously connected, respectively continuous means that the gradual changes of the foot supporting openings of the lower die template and the lower die hot pressing plate are continuous, and the gradual changes of the connection part connecting the continuous lower die template and the lower die hot pressing plate are also continuous, so-called continuous means that the gradual changes are consistent, for example, the degree of reduction of the upper stage and the next stage is consistent, if the separation part is located on the same stage of step surface, the continuous means that the separation part is continuous, and no fault exists.

The bottom of the support leg opening of the lower die hot pressing plate 33 is provided with a square or rectangular plane which is consistent with the shape of the outer surface of the bottom of the support leg, four corners of the plane can be rounded, and reinforcing rib female dies 38 which are consistent with the shape of the reinforcing ribs on the tray support leg are arranged in the support leg opening 341 of the lower die template 34 and the corresponding support leg opening 331 of the lower die hot pressing plate 33.

In the present embodiment, the portion above the corner 1143 of the reinforcement rib corresponding to the stand-off is formed in the lower die plate 34, and the portion below the corner 1143 of the reinforcement rib corresponding to the stand-off is formed in the lower die heating plate 33.

The upper surface of the lower die template 34 is provided with a reinforcing rib female die 342 used for pressing the lower surface of a reinforcing rib, the reinforcing rib female die 342 comprises a transverse connection type reinforcing rib female die 3421 which is connected with a supporting foot opening hole of a corresponding edge supporting foot and a supporting foot opening hole of a corresponding corner supporting foot adjacent to the supporting foot opening hole, a first oblique connection type reinforcing rib female die 3422 which is respectively connected with a supporting foot opening hole of each corresponding corner supporting foot and a supporting foot opening hole of a corresponding center supporting foot, a second oblique connection type reinforcing rib female die 3423 which is connected with two supporting foot opening holes of two adjacent corresponding edge supporting feet, a semi-partition type transverse reinforcing rib female die 3424 of which one end is connected with the supporting foot opening hole of the corresponding edge supporting foot and the other end extends to a supporting foot opening hole close to the corresponding center supporting foot, and a.

The first slant connection type reinforcing rib female die 3422 forms a large cross-shaped female die by taking the clamping part corresponding to the central supporting foot as the center, the first slant connection type reinforcing rib female die 3422 and the second slant connection type reinforcing rib female die 3423 are crossed to form a small cross-shaped female die, a small triangle is formed between the small cross-shaped female die and the transverse connection type reinforcing rib female die 3421 corresponding to the position, and the partition type arc-shaped reinforcing rib female die 3425 is arranged in the small triangle area.

The reinforcing rib female dies are used for forming the lower surfaces of the reinforcing ribs on the tray, the cross sections of the concave parts of the reinforcing rib female dies are smooth cambered surfaces, the outer surfaces of the formed reinforcing ribs are also smooth cambered surfaces, the edge stress of the tray can be reduced to the maximum extent, the bearing capacity of the tray is improved, the arc-shaped reinforcing ribs are in a partition mode, the bearing capacity of the edge of the tray can be enhanced, and stress concentration areas can be prevented from being formed at the supporting feet of the tray.

The reinforcing rib female dies on the lower die template correspond to the reinforcing rib male dies on the upper die template one by one, and the distance between the reinforcing rib female dies and the reinforcing rib male dies is consistent with the thickness of the die plates when the dies are closed.

In some preferred embodiments, the thickness of the lower die plate is determined primarily by the need to form the lower surface of the pallet to accommodate the ribs, and therefore the thickness of the lower die plate need only exceed the depth of the ribs, but to meet certain strength requirements, the thickness of the lower die plate is typically twice the depth of the ribs, where the depth of the ribs is the vertical distance from the upper surface of the formed pallet to the lower surface of the ribs.

The invention provides a die pressing tray which comprises a tray body, wherein a supporting foot structure and a reinforcing structure are arranged on the tray body, and the die pressing tray is characterized in that the reinforcing structure is a reinforcing rib which is pressed on the surface of the tray body and is embodied in a groove structure, the reinforcing rib comprises a connecting reinforcing rib, a partition type reinforcing rib and a semi-partition type reinforcing rib, the supporting foot structure comprises a corner supporting foot, an edge supporting foot and a center supporting foot, and two ends of the partition type reinforcing rib are not communicated with the supporting feet. The invention has reasonable structural design and strong bearing capacity, can be used for pertinently arranging and designing stress concentration positions of a gathering part of the reinforcing ribs, a supporting foot and the like, and solves the problems that the tray in the prior art has low local bearing strength, is easy to generate stress fracture and local cracking and the like.