阅读说明：本技术 一种pvc发泡板挤出模具 (PVC foaming board extrusion tooling ) 是由 王道胜 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种PVC发泡板挤出模具,涉及发泡板挤出模具技术领域。本发明包括下模板和与下模板配合的上模板,下模板上表面与进料口依次连通有分流缓冲区、均流区、成型模槽；分流缓冲区包括缓冲槽；下模板上表面且位于缓冲槽两侧对称开设有一对与缓冲槽连通的L形导向槽；一对L形导向槽相对侧面且远离分流缓冲区一端线性排列开有矩形导流孔；上模板下表面开有与进料口连通的T形导流槽；T形导流槽分别与缓冲槽和一对L形导向槽连通；上模板下表面对称固定有一对L形连接导槽。本发明通过设计的下模板与上模板发泡向三个方向进入到成型模槽中,PVC发泡板更加容易快速成型,解决了现有模具在成型PVC发泡板时效率低的问题。(The invention discloses a PVC (polyvinyl chloride) foam board extrusion die, and relates to the technical field of foam board extrusion dies. The invention comprises a lower template and an upper template matched with the lower template, wherein the upper surface of the lower template is sequentially communicated with a feed inlet to form a flow dividing buffer area, a flow equalizing area and a forming die cavity; the shunt buffer area comprises a buffer slot; a pair of L-shaped guide grooves communicated with the buffer groove are symmetrically formed in the upper surface of the lower template and positioned on two sides of the buffer groove; one end of the pair of L-shaped guide grooves, which is opposite to the side faces and is far away from the shunting buffer area, is linearly arranged with a rectangular guide hole; the lower surface of the upper template is provided with a T-shaped diversion trench communicated with the feed inlet; the T-shaped guide grooves are respectively communicated with the buffer groove and the pair of L-shaped guide grooves; a pair of L-shaped connecting guide grooves are symmetrically fixed on the lower surface of the upper template. According to the invention, the PVC foaming plate enters the forming die cavity in three directions through the foaming of the designed lower template and upper template, so that the PVC foaming plate is easier to form quickly, and the problem of low efficiency of the existing die in forming the PVC foaming plate is solved.)

1. The utility model provides a PVC foaming board extrusion tooling, includes lower bolster (1) and with lower bolster (1) complex cope match-plate pattern (2), its characterized in that:

the upper surface of the lower template (1) and the feed inlet are sequentially communicated with a flow splitting buffer area (3), a flow equalizing area (4) and a forming die cavity (5);

the shunt buffer (3) comprises a buffer slot (6); a pair of L-shaped guide grooves (7) communicated with the buffer groove (6) are symmetrically formed in the upper surface of the lower template (1) and positioned on two sides of the buffer groove (6); one end of the pair of L-shaped guide grooves (7), which is opposite to the side faces and is far away from the shunting buffer area (3), is linearly provided with a rectangular diversion hole (8);

the lower surface of the upper template (2) is provided with a T-shaped diversion trench (9) communicated with the feeding hole; the T-shaped guide grooves (9) are respectively communicated with the buffer groove (6) and the pair of L-shaped guide grooves (7); a pair of L-shaped connecting guide grooves (10) are symmetrically fixed on the lower surface of the upper template (2);

the middle parts of the lower template (1) and the upper template (2) are provided with a hot flow channel (11) and a cold flow channel (12).

2. The PVC foam board extrusion die of claim 1, wherein the flow equalizing zone (4) comprises a rectangular flow guide groove (14) for communicating the buffer groove (6) with the forming die groove (5); the surface of the rectangular diversion trench (14) is fixed with diversion columns (15) which are arranged in a staggered mode.

3. The PVC foam board extrusion die of claim 1, wherein the hot flow channel (11) and the cold flow channel (12) are in an S-shaped structure arranged in parallel in a double line; heat conducting rods (13) are uniformly distributed and fixed between the upper inner wall and the lower inner wall of the hot flow channel (11) and the cold flow channel (12); the cross section of the heat conducting rod (13) is of a diamond structure.

4. The PVC foam board extrusion die of claim 1, wherein an inclined upward triangular cutting edge (16) is fixed at one end of the L-shaped connecting guide groove (10) far away from the upper die plate (2).

Technical Field

The invention belongs to the technical field of foaming plate extrusion dies, and particularly relates to a PVC foaming plate extrusion die.

Background

The runner structure that present cope match-plate pattern and lower bolster formed after combining designs unreasonablely, the shaping chamber feed inlet has certain drop rather than rear end density and thickness when the PVC foaming board finished product, need cut off the back use with the PVC foaming board of rear side after taking out, the fashioned effective use area of material reduces, a large amount of materials have been wasted in production, some manufacturers are in order to be full of the material with mould shaping space, the mould that corresponds need increase the shaping time when the shaping, production efficiency has been reduced.

Disclosure of Invention

The invention aims to provide a PVC foam board extrusion die, which enters a forming die cavity in three directions through the foaming of a designed lower die plate and an upper die plate, so that a PVC foam board is easier to rapidly form, and the problem of low efficiency of the existing die in forming the PVC foam board is solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a PVC foaming board extrusion die, which comprises a lower die plate and an upper die plate matched with the lower die plate, wherein the upper surface of the lower die plate is sequentially communicated with a feed inlet to form a flow dividing buffer area, a flow equalizing area and a forming die cavity;

the shunting buffer area comprises a buffer slot; a pair of L-shaped guide grooves communicated with the buffer groove are symmetrically formed in the upper surface of the lower template and positioned on two sides of the buffer groove; a pair of rectangular diversion holes are linearly arranged on the opposite side surfaces of the L-shaped guide grooves and far away from one end of the diversion buffer area;

the lower surface of the upper template is provided with a T-shaped diversion trench communicated with the feed inlet; the T-shaped guide grooves are respectively communicated with the buffer groove and the pair of L-shaped guide grooves; a pair of L-shaped connecting guide grooves are symmetrically fixed on the lower surface of the upper template;

the middle parts of the lower template and the upper template are provided with a hot flow channel and a cold flow channel.

Further, the flow equalizing area comprises a rectangular diversion trench for communicating the buffer trench with the forming die cavity; and guide post groups which are arranged in a staggered mode are fixed on the surfaces of the rectangular guide grooves.

Furthermore, the hot flow channel and the cold flow channel form an S-shaped structure which is arranged in parallel in a double-line mode, and the forming of the hot flow channel and the cold flow channel adopts the steps of firstly slotting and then welding a sealing plate above a channel to form a closed S-shaped flow guide channel; heat conducting rods are uniformly distributed and fixed between the upper inner wall and the lower inner wall of the hot flow channel and the cold flow channel, and the heat conducting rods are made of copper alloy to improve the heat conductivity; the cross section of the heat conducting rod is of a diamond structure.

Furthermore, one end of the L-shaped connecting guide groove, which is far away from the upper die plate, is fixedly provided with a triangular cutting edge which inclines upwards.

The invention has the following beneficial effects:

1. according to the invention, through the designed lower template and upper template, injected foam enters the forming die cavity in three directions, PVC foam injected simultaneously in front and at the back of the forming die cavity accelerates the filling rate, the time for PVC foam to enter the forming die cavity is shortened, and the PVC foam board with a full cavity under high pressure is injected, so that the PVC foam board is easier to form quickly.

2. According to the PVC foaming machine, the heat flow channel and the cold flow channel are respectively formed in the middle of the lower template and the upper template, the heat flow channel is used for introducing hot steam and is opened when PVC foaming is injected, the flowability of PVC foaming and the expansion performance of bubbles are guaranteed, and cold water is introduced into the cold flow channel when the PVC foaming is completed, so that the hardening of the PVC foaming surface is accelerated, and the PVC foaming board is quickly formed.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a transverse cross-sectional structure of an extrusion die for PVC foam boards according to the present invention;

FIG. 2 is a schematic longitudinal cross-sectional structure of the present invention;

FIG. 3 is a schematic structural view of a lower template;

FIG. 4 is a schematic bottom view of the upper platen;

FIG. 5 is a schematic left side view of the upper platen;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a cross-sectional view taken at A-A of FIG. 5;

in the drawings, the components represented by the respective reference numerals are listed below:

1-lower template, 2-upper template, 3-flow splitting buffer zone, 4-flow equalizing zone, 5-forming die cavity, 6-buffer groove, 7-L-shaped guide groove, 8-rectangular guide hole, 9-T-shaped guide groove, 10-L-shaped connecting guide groove, 11-hot flow channel, 12-cold flow channel, 13-heat conducting rod, 14-rectangular guide groove, 15-guide column and 16-triangular cutting edge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the invention relates to a PVC foam board extrusion die, which comprises a frame, wherein a lower fixing plate is arranged on the frame, a lower die plate 1 and an opening and closing guide pillar are arranged on the lower fixing plate, an upper fixing plate is arranged on the opening and closing guide pillar in a sliding manner, and an upper die plate 2 matched with the lower die plate 1 is arranged at the bottom of the upper fixing plate; the upper surface of the lower template 1 is sequentially communicated with a feeding hole through a flow-dividing buffer area 3, a flow-dividing area 4 and a forming die cavity 5;

the shunt buffer 3 comprises a buffer slot 6; a pair of L-shaped guide grooves 7 communicated with the buffer groove 6 are symmetrically formed in the upper surface of the lower template 1 and positioned on two sides of the buffer groove 6; a pair of L-shaped guide grooves 7 are arranged in a linear mode at the opposite side faces and one end far away from the shunting buffer area 3 to form rectangular guide holes 8;

the lower surface of the upper template 2 is provided with a T-shaped diversion trench 9 communicated with the feeding hole; the T-shaped guide grooves 9 are respectively communicated with the buffer groove 6 and the pair of L-shaped guide grooves 7; a pair of L-shaped connecting guide grooves 10 are symmetrically fixed on the lower surface of the upper template 2;

the middle parts of the lower template 1 and the upper template 2 are respectively provided with a hot flow channel 11 and a cold flow channel 12.

The flow equalizing area 4 comprises a rectangular diversion trench 14 for communicating the buffer trench 6 with the forming die cavity 5; the surface of the rectangular diversion trench 14 is fixed with a group of diversion columns 15 which are arranged in a staggered manner, and three rows of upper end faces of the group of diversion columns 15 close to one side of the forming die cavity 5 are provided with inclined faces which incline downwards towards the forming die cavity 5.

As shown in fig. 7, the hot runner 11 and the cold runner 12 form an S-shaped structure arranged in parallel in a double-line manner, and the forming of the hot runner 11 and the cold runner 12 adopts grooving first and then welding a sealing plate above the channel to form a closed S-shaped flow guide channel; heat conducting rods 13 are uniformly distributed and fixed between the upper inner wall and the lower inner wall of the hot flow channel 11 and the cold flow channel 12, and the heat conducting rods 13 are made of copper alloy to improve the heat conductivity; the cross section of the heat conducting rod 13 is of a diamond structure, so that the relative contact area is increased, and the heat exchange efficiency is improved; the hot flow channel 11 is used for introducing hot steam, and is opened when PVC foaming is injected, so that the fluidity of PVC foaming and the expansion performance of bubbles are guaranteed, and the cold flow channel 12 is used for introducing cold water when PVC foaming is completed, so that the hardening of the PVC foaming surface is accelerated, and the PVC foaming plate is quickly molded.

As shown in fig. 6, an end of the L-shaped connecting channel 10 away from the upper die plate 2 is fixed with a triangular cutting edge 16 which inclines upwards.

When the PVC foaming machine is used, the lower template 1 and the upper template 2 are matched through a mold opening and closing device on a frame, after the mold is matched, basic equipment is inserted into a feed inlet between the lower template 1 and the upper template 2, PVC foaming is extruded into a flow distribution buffer area 3, the foaming enters a forming mold groove 5 in three directions under the flow distribution action of a T-shaped guide groove 9, an L-shaped guide groove 7 and a flow distribution area 4, when the PVC foaming passes through the flow distribution area 4, the PVC foaming divides the whole rectangular guide groove 14 into a plurality of small flow passages which are communicated through guide columns 15 which are arranged in a staggered mode, materials flow in the small flow passages among the guide columns 15, flow together after being continuously distributed, and then flow together after being distributed, so that the plasticizing and high dispersibility of the materials are obviously improved, the outlet pressure is more balanced, and the products are easier to form; in addition two tunnel PVC foaming enter into shaping die cavity 5 from two L shape guide ways 7 of shaping die cavity 5 both sides, participate in the shaping of product, directly with partly PVC foaming water conservancy diversion to shaping die cavity 5 back position, reduced the time that the PVC foaming entered into in the shaping die cavity 5, a plurality of directions pour into the PVC foaming board that makes in the shaping die cavity 5 into in to shaping die cavity 5 into and shape more easily.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.