阅读说明：本技术 轻量化装饰件复合片材热压成型模具 (Light decoration composite sheet hot-pressing forming die ) 是由 朱峰 巴连磊 于 2019-08-22 设计创作，主要内容包括：本发明提供一种轻量化装饰件复合片材热压成型模具,其中,压机包括设置成可开合的第一部分和第二部分,第一部分和第二部分之间限定热压工位,并可在该热压工位可对片材进行加热和平面预热压工序,注塑模具包括设置成可开合的第三部分和第四部分,第三部分和第四部分之间限定片材的3D成型工位,并可在该3D成型工位的片材上执行注塑成型工艺,传输系统包括两柔性传动件以及与柔性传动件传动配合的轮子,两柔性传动件设置成能搭载片材；其中,第二部分和第三部分背对背相组装,两柔性传动件限定循环传输路径,循环传输路径环绕第二部分和第三部分。本发明可以简化装饰件的制造工艺步骤,提高产品质量并降低生产成本。(The invention provides a light-weight decoration composite sheet hot-pressing forming die, wherein a press comprises a first part and a second part which are arranged to be opened and closed, a hot-pressing station is defined between the first part and the second part, the sheet can be heated and subjected to plane pre-hot-pressing at the hot-pressing station, the injection molding die comprises a third part and a fourth part which are arranged to be opened and closed, a 3D forming station of the sheet is defined between the third part and the fourth part, an injection molding process can be executed on the sheet at the 3D forming station, a transmission system comprises two flexible transmission parts and wheels in transmission fit with the flexible transmission parts, and the two flexible transmission parts are arranged to carry the sheet; wherein the second portion and the third portion are assembled back-to-back, the two flexible drives defining an endless transport path that encircles the second portion and the third portion. The invention can simplify the manufacturing process steps of the decorating part, improve the product quality and reduce the production cost.)

1. The utility model provides a lightweight decoration composite sheet hot briquetting mould which characterized in that includes:

the device comprises a press, a first pressing device and a second pressing device, wherein the press comprises a first part and a second part which are arranged to be opened and closed, a hot pressing station is defined between the first part and the second part, and the sheet can be subjected to heating and plane pre-hot pressing procedures at the hot pressing station;

the injection mold comprises a third part and a fourth part which are arranged to be opened and closed, a 3D forming station of the sheet is defined between the third part and the fourth part, and an injection molding process can be executed on the sheet of the 3D forming station; and

the conveying system comprises two flexible transmission parts and wheels in transmission fit with the flexible transmission parts, and the two flexible transmission parts are arranged to carry sheets;

wherein the second and third portions are assembled back-to-back, the two flexible drives defining an endless transport path that encircles the second and third portions to allow sheets carried by the two flexible drives to be transported from the hot pressing station to the 3D forming station.

2. The light weight trim piece composite sheet hot press molding die of claim 1, wherein the first portion comprises a first platen, the first platen comprises a 2D side moving die, the 2D side moving die comprises a first heating plate; the second section comprises a second platen comprising a 2D side stationary mold, the 2D side stationary mold comprising a second heating plate;

the third part comprises a 3D side moving die, the 3D side moving die comprises a 3D side cavity plate, and the fourth part comprises a 3D side fixed die.

3. The light weight trim piece composite sheet hot press molding die of claim 2, wherein the injection mold is a mold used by a horizontal injection molding machine, and the first pressing plate and the second pressing plate are arranged to be mounted and fixed on a mold plate of the horizontal injection molding machine in a horizontal direction and to be movable relative to each other.

4. The light weight trim piece composite sheet hot press molding die of claim 3, wherein the first pressing plate, the second pressing plate, and the 3D side movable die are configured to be movable in the same side direction to open the injection mold.

5. The light weight trim piece composite sheet hot press molding die of claim 3, wherein the transport system is configured to allow the sheet to move upward from the hot press station, to bypass the 2D side stationary mold and the top of the 3D molding side cavity plate, and to move downward into the 3D molding station.

6. The light weight trim piece composite sheet hot press molding die of claim 2, wherein the first platen has a platen cavity, the first heating plate is disposed in the platen cavity, the press further comprises a heating plate driving device for driving the first heating plate to move in the platen cavity to meet the requirements of different hot press thicknesses.

7. The light-weight decoration composite sheet hot-press molding die of claim 6, wherein the heating plate driving device comprises an oil cylinder; the outer peripheral side of the first pressure plate is provided with a guide groove, the outer peripheral side of the first heating plate is provided with a chute, the oil cylinder is arranged on the outer peripheral side of the first pressure plate and matched with the chute through a wedge penetrating through the guide groove, and the first heating plate is moved in the pressure plate cavity through the movement of the wedge.

8. The light weight trim piece composite sheet hot press molding die of claim 1, wherein the flexible transmission member is a transmission belt, the second portion and the third portion are provided with a plurality of belt wheels, the transmission belt is in transmission fit with the belt wheels, and one of the belt wheels is driven by a motor.

9. The hot-press molding die for the light-weight decoration composite sheet material as claimed in claim 8, wherein a plurality of transmission teeth are distributed on the transmission belt along the length direction of the transmission belt, the belt wheel is a gear, and the transmission belt and the belt wheel can be in meshing transmission.

10. A light weight trim piece composite sheet hot press molding die as claimed in claim 2, wherein two flexible actuators bypass the 2D side stationary die and the movable frame mounted to the 3D side cavity plate, the flexible actuators having a plurality of nibs along their length, the flexible actuators being positioned to allow the first and second pressure plates to press the flexible actuators so that the nibs pierce the sheet and effect movement of the sheet between the hot press station and the 3D molding station.

Technical Field

The invention relates to a forming die, in particular to a forming die for an automobile interior decoration part, and more particularly relates to a hot-press forming die for a light decoration part composite sheet.

Background

A decorative element for the interior of a vehicle comprises a substrate which may be a synthetic plastic part of fibres (natural and synthetic fibres) and a covering layer of leather material which provides a visible surface for the decorative element. A mold comprises a 2D plate heating prepressing part and a 3D plate forming and back integrated injection molding part. An upper mold and a lower mold of the 3D part, the upper mold providing a nozzle configured to provide a passage for molten plastic to be injected into a mold cavity formed by the upper and lower mold halves. The leather materials of the substrate and the covering layer are heated and pre-pressed at the 2D side, then are placed between the upper die and the lower die through the transmission mechanism, and then the injection molding process is carried out on the substrate board covered by the leather materials. US2017015032a1 discloses such decorative pieces.

Prior to the injection molding process of such decorative elements, the cover layer is formed from a sheet of material having an initial thickness of a relatively thick thickness, for example 8-10 mm, which is heated and then compressed to a thinner thickness, for example 1.4-1.8 mm. The injection molding process is carried out on the basis of keeping the heat of the sheet. The hot pressing and the injection molding are processed separately, the current hot pressing is finished on a vertical hot press machine, and the injection molding process is finished on an injection molding machine independent of the hot press machine.

Disclosure of Invention

The invention aims to provide a light-weight decoration composite sheet hot-press forming die which can simplify the steps of the decoration manufacturing process.

The invention provides a light decoration composite sheet hot-pressing forming die, which comprises: the device comprises a press, a first pressing device and a second pressing device, wherein the press comprises a first part and a second part which are arranged to be opened and closed, a hot pressing station is defined between the first part and the second part, and the sheet can be subjected to heating and plane pre-hot pressing procedures at the hot pressing station; the injection mold comprises a third part and a fourth part which are arranged to be opened and closed, a 3D forming station of the sheet is defined between the third part and the fourth part, and an injection molding process can be executed on the sheet of the 3D forming station; the conveying system comprises two flexible transmission parts and wheels in transmission fit with the flexible transmission parts, and the two flexible transmission parts are arranged to carry sheets; wherein the second and third portions are assembled back-to-back, the two flexible drives defining an endless transport path that encircles the second and third portions to allow sheets carried by the two flexible drives to be transported from the hot pressing station to the 3D forming station.

In one embodiment, the first portion comprises a first platen comprising a 2D side moving die, the 2D side moving die comprising a first heating plate; the second section comprises a second platen comprising a 2D side stationary mold, the 2D side stationary mold comprising a second heating plate; the third portion comprises a 3D side moving die, the 3D side moving die comprising a 3D side cavity plate; the fourth section includes a 3D side stationary mold.

In one embodiment, the injection mold is a mold used in a horizontal injection molding machine, and the first pressing plate and the second pressing plate are configured to be mounted and fixed on a mold plate of the horizontal injection molding machine in a horizontal direction and to be movable relative to each other.

In one embodiment, the first pressing plate, the second pressing plate, and the 3D side movable mold are provided to be movable in the same side direction to open the injection mold.

In one embodiment, the transport system is configured to allow the sheet to move upward from the hot press station, around the top of the 2D side stationary mold and the 3D mold side cavity plate, and downward into the 3D molding station.

In one embodiment, the first press plate has a press plate cavity, the first heating plate is disposed in the press plate cavity, and the press further comprises a heating plate driving device for driving the first heating plate to move in the press plate cavity to meet the requirements of different hot pressing thicknesses.

In one embodiment, the heating plate driving means comprises a cylinder; the outer peripheral side of the first pressure plate is provided with a guide groove, the outer peripheral side of the first heating plate is provided with a chute, the oil cylinder is arranged on the outer peripheral side of the first pressure plate and matched with the chute through a wedge penetrating through the guide groove, and the first heating plate is moved in the pressure plate cavity through the movement of the wedge.

In one embodiment, the flexible transmission member is a transmission belt, and the second portion and the third portion are provided with a plurality of pulleys, the transmission belt is in transmission fit with the pulleys, and one of the pulleys is driven by a motor.

In one embodiment, the transmission belt is provided with a plurality of transmission teeth distributed along the length direction thereof, the belt wheel is a gear, and the transmission belt and the belt wheel can be in meshing transmission.

In one embodiment, two flexible transmission members bypass the 2D side fixed die and the movable frame mounted on the 3D side cavity plate, the flexible transmission members have a plurality of protruding tips along the length direction thereof, and the flexible transmission members are positioned to allow the first pressing plate and the second pressing plate to press the flexible transmission members so that the protruding tips penetrate into the sheet material and to realize the movement of the sheet material between the hot pressing station and the 3D forming station.

By adopting the lightweight decoration composite sheet hot-pressing forming die, hot pressing and forming can be continuously completed in one step, so that the manufacturing process steps of the decoration can be simplified, and the operation is more convenient. And adopt above-mentioned lightweight decoration composite sheet hot briquetting mould can also improve product quality and reduce manufacturing cost, reduce treatment cost and equipment investment.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a lightweight trim composite sheet hot press molding die.

Fig. 2 is a sectional view of a lightweight trim composite sheet hot press molding die.

Fig. 3 is a schematic view of a hot press molding die for a lightweight trim composite sheet.

Fig. 4 is a partially enlarged view showing the movable frame.

Fig. 5 is a partially enlarged view showing the convex tip.

Fig. 6 is a partially enlarged view showing the belt in a relaxed state.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

It is noted that these and other drawings are merely illustrative and are not drawn to scale and should not be considered as limiting the scope of the invention. Further, the conversion methods in the different embodiments may be appropriately combined.

Fig. 1 is an exploded view of a lightweight garnish composite sheet hot-press molding die 10, and fig. 2 is a sectional view of the lightweight garnish composite sheet hot-press molding die 10, the sectional position being located approximately at the middle of the lightweight garnish composite sheet hot-press molding die 10. Fig. 3 mainly shows a driving means of the first heating plate 110. The light-weight decoration composite sheet hot-press forming die 10 can also be called a light-weight decoration composite sheet hot-press forming and back injection molding integrated forming die.

As shown in fig. 1 and 2, the lightweight decoration composite sheet hot press molding die 10 includes a press 1 and an injection mold 2, and further includes a transfer system 3.

The light-weight decoration composite sheet hot-press molding die 10 processes a sheet, which is not shown in the drawings, and the sheet is a processed object processed by the die, such as a surface layer of a decoration, and may be a leather material or other sheet, such as NPFF (hemp fiber and PP material), or a combined sheet of the two.

The press 1 comprises a first part 1A and a second part 1B arranged to be openable and closable. The first section 1A and the second section 1B define a hot pressing station B1 therebetween, where the sheet material may be subjected to a heating and planar pre-hot pressing process, otherwise referred to as a 2D hot pressing process, at a hot pressing station B1. The hot pressing process can correct the thickness of the sheet and heat-dry the sheet so that the sheet has a set temperature. The first section 1A and the second section 1B can be relatively moved to perform an opening and closing action, thereby hot-pressing and exhausting the sheet.

Referring to fig. 2, the press 1 may include a first heating plate 110 and a second heating plate 120 that are provided to be openable and closable. In the illustrated embodiment, the first portion 1A of the press 1 comprises a first platen 11 and the second portion 1B of the press 1 comprises a second platen 12, the first platen 11 also being referred to as a 2D side moving platen and the second platen 12 also being referred to as a 2D side stationary platen. The first press plate 11 includes a 2D-side moving mold 111, the 2D-side moving mold 111 includes a first heating plate 110, and the second press plate 12 includes a 2D-side fixed mold 122, and the 2D-side fixed mold 122 includes a second heating plate 120. The first and second pressing plates 11 and 12 are provided to be relatively movable in a horizontal direction (left-right direction in fig. 2) so that the first and second heating plates 110 and 120 are openable and closable in the horizontal direction, thereby placing or hot-pressing the sheet. For example, the heating plates 110 and 120 may be made of steel, and are embedded with heating wires, thermocouples, and the like, for providing heat and controlling temperature. The surface of the heating plate, which is in contact with the sheet, can be subjected to anti-adhesion coating treatment for anti-adhesion demolding of the heating plate.

Referring to fig. 1 and 2, the first portion 1A includes a machine fixing plate 15 and heat insulating plates 13, 14 connected to each other in order from left to right. For example, the machine fixing plate 15 may be fixedly connected to a first frame (not shown) movable in the lightweight decoration composite sheet hot press molding die 10 and move together with the first frame, and the heat insulation plates 13 and 14 and the first heating plate 110 may be fixed to the machine fixing plate 15, so that the first pressing plate 11 may move integrally (e.g., in a left-right direction in fig. 1) with the movement of the first frame, thereby implementing an opening and closing operation with the second pressing plate 12, that is, an opening and closing operation of the first heating plate 110 and the second heating plate 120, thereby placing a sheet when opened and hot-pressing the sheet when closed.

Referring to fig. 1 and 2, the first presser plate 11 has a presser plate chamber a 1. The first heating plate 110 is disposed in a platen cavity a1 of the first platen 11, and is movable in a platen cavity a1, for example, by the driving of a heating plate driving device 5, which will be described below. In the process that the first heating plate 110 moves left and right, the gas inside the pressure plate cavity a1 can be squeezed, so that the internal gas, especially the water vapor generated in the hot pressing process, can be discharged from the pressure plate cavity a1 (for example, from the air hole on the upper side of the first pressure plate 11 in fig. 1), the influence on the subsequent molding process can be avoided, and the molding quality is better. Moreover, the first heating plate 110 can move independently in the platen cavity a1 of the first platen 11, and can also meet the requirements of different thickness and different material of the sheet material, thereby providing convenience for the design of products with different wall thickness or different requirements.

In fig. 2, the second heated plate 120 is fixed relative to the second platen 12. In another embodiment, the second heated plate 120 may also be provided to be movable in the platen cavity of the second platen 12 similar to the first heated plate 110.

As mentioned above, the press 1 may further include the heating plate driving device 5, and the heating plate driving device 5 may drive the first heating plate 110 to move in the platen cavity a1 to achieve the requirements of different hot pressing thicknesses. For example, referring to fig. 3, fig. 3 illustrates an example configuration of a lightweight garnish composite sheet hot press molding die 10 when viewed from above toward below in fig. 2, in which a heating plate driving device 5 is illustrated. In fig. 3, the heating panel driving means 5 includes oil cylinders 51 (in the drawing, two oil cylinders 51 located on the front side and the rear side, respectively). The outer peripheral side of the first presser plate 11 is provided with guide grooves 114 (fig. 1 may also be combined). The outer circumferential side of the first heating plate 110 is provided with a chute 116. The oil cylinder 51 of the heating plate driving device 5 is disposed at the outer circumferential side of the first pressing plate 11, and the first heating plate 110 is moved in the pressing plate chamber a1 by the movement of the wedge 6 by passing the wedge 6 through the guide groove 114, engaging with the inclined groove 116 (specifically, the inclined surface 61 of the wedge 6 engages with the inclined surface of the inclined groove 116). Taking the oil cylinder 51 located at the front side in fig. 3 as an example, when the oil cylinder 51 drives the wedge 6 to move to the rear side, the first heating plate 110 is pushed to move to the right due to the cooperation of the wedge 6 and the chute 116. The first heating plate 110 may be connected to the wall of the platen chamber a1 by a resilient member such as a spring so that the first heating plate 110 may be resiliently returned to its original position when the wedge 6 is withdrawn from the guide groove 114.

Continuing back to fig. 1 and 2, the injection mold 2 includes a third portion 2A and a fourth portion 2B that are arranged to be openable and closable. The third portion 2A and the fourth portion 2B define a 3D forming station B2 for the sheet material therebetween, and the sheet material may be placed at a 3D forming station B2 and an injection molding process, otherwise referred to as a 3D forming process, may be performed on the sheet material at the 3D forming station B2. The third section 2A and the fourth section 2B are also movable relative to each other to open and close, and when the third section 2A and the fourth section 2B are opened, the sheet material can be transported from the aforementioned hot pressing station B1 to the 3D forming station B2 by the transport system 3, which will be described in detail below, and then the third section 2A and the fourth section 2B are closed, and the sheet material at the 3D forming station B2 is subjected to an injection molding process.

The injection mold 2 includes a 3D side moving mold 21 and a 3D side fixed mold 22 that are provided to be openable and closable. In the illustrated embodiment, the 3D side moving die 21 may be included in the third portion 2A, and the 3D side fixed die 22 may be included in the fourth portion 2B. At the 3D molding station B2, the 3D-side movable mold 21 and the 3D-side fixed mold 22 may be clamped and an injection molding process is performed on the sheet. The fourth section 2B also includes, from left to right in the figure, first ejector plates 23, 24, a hot runner mold 25, second ejector plates 26, 27 (the second ejector plate 27 also functions as a mold spacer), and a machine fixing plate 28, which are connected to each other. For example, the 3D-side fixed mold 22 and the first ejector plates 23, 24, the hot runner mold 25, the second ejector plates 26, 27 are fixed to a machine fixing plate 28, and the machine fixing plate 28 is fixed to a base (not shown) in the lightweight garnish composite sheet hot press molding die 10, so that the 3D-side fixed mold 22 is fixed to the base. The 3D side moving die 21 can move left and right with respect to the 3D side fixed die 22 by the driving of the driving mechanism, thereby performing an opening and closing operation.

Referring to fig. 4, the third portion 2A includes a 3D mold side cavity plate 210. The movable frame 8 is mounted on the 3D molding side cavity plate 210, and the movable frame 8 is driven by a corresponding driving mechanism, such as the air cylinder 81 in fig. 4, to move in the horizontal direction, so as to drive the 3D molding side cavity plate 210 to move in the horizontal direction relative to the other parts of the third portion 2A, so as to perform a process auxiliary molding function when the mold clamping is performed for 3D hot press molding, and the movable frame 8 may also be referred to as a sheet hot press molding auxiliary pressing frame. The fourth section 2B may also include a sheet material thermoforming auxiliary press frame similar to the movable frame 8.

The second part 1B of the press 1 and the third part 2A of the injection mould 2 are assembled back to back. The second portion 1B (or, the second presser plate 12) and the back surface side of the third portion 2A (or, the 3D-side movable die 21) may be spaced apart from each other by the heat insulating plate 4, thereby preventing influence therebetween.

In fig. 1 and 2, the opening and closing directions of the press 1 and the injection mold 2 are in the horizontal direction, which is particularly suitable for the production of precision decorative parts or for the production of precision and large-sized decorative parts. For small-product decorations, the press 1 and the injection mold 2 can be modified to be arranged in the vertical direction, i.e. the opening and closing direction thereof is in the vertical direction. For precision decoration or jumbo size decoration, consider the mould dead weight problem, lead to the accurate control degree of difficulty to increase, consequently recommend selecting and use level to set up press 1 and injection mold 2.

The press 1 and the injection mold 2 may employ a known hot press configuration and a known injection mold configuration. For example, the injection mold 2 may be a mold used in a known horizontal injection molding machine, and the press 1 may be constructed similarly to a vertical hot press. In fig. 1 and 2, the 3D side movable die 21 (or the first part 1A, the second part 1B, and the third part 2A) of the press 1 and the injection mold 2 may be moved leftward as a whole, the movement being guided by a guide mechanism not shown in the drawings, for example, by cooperation of holes and guide posts. In embodiments where the injection mold 2 is a mold used in a horizontal injection molding machine, the press 1 may be mounted on the horizontal injection molding machine. In fig. 1 and 2, the opening and closing directions of the press 1 and the injection mold 2 are in the horizontal direction, and the first platen 11 (or the first part 1A), the second platen 12 (or the second part 1B) of the press 1 and the 3D side movable die 21 (or the third part 2A) of the injection mold 2 are provided to be movable in the same side direction (to the left in fig. 1 and 2) to open the injection mold 2. For example, the press 1 may be moved in the left-right direction in fig. 1 and 2 with the second frame of the horizontal injection molding machine including the injection mold 2 as a carrier. For example, the first platen 11 and the second platen 12 of the press 1 are arranged to be mounted and fixed in a horizontal direction on a mold plate of a horizontal injection molding machine including the injection mold 2, the mold plate being movable in the horizontal direction relative to the rest of the horizontal injection molding machine.

With continued reference to fig. 1 and 2, the following describes the transmission system 3. The transfer system 3 comprises two flexible transmission members 31 and further comprises wheels 32 in driving engagement with the flexible transmission members 31. The flexible transmission members 31 are provided so as to carry a sheet. By flexible transmission is meant that the transmission can be deformed and recovered.

The two flexible transmission members 31 define an endless transport path S. An endless transport path S encircles the second and third sections 1B, 2A to allow the sheets carried by the two flexible drives 31 to be transported from the above-mentioned hot pressing station B1 to the above-mentioned 3D forming station B2. The endless transport path S is only schematically shown in fig. 1 and can transport the sheet clockwise in fig. 1, i.e. from above the second and third sections 1A, 1B from the hot pressing station B1 defined between the sections 1A, 1B to the 3D forming station B2 defined between the sections 2A, 2B. In other words, the transport system 3 is configured to allow the sheet to move upward from the hot press station B1, around the top of the 2D side stationary mold 122 (or, the second portion 1B) and the 3D molding side cavity plate 210 (or, the third portion 2A), and downward into the 3D molding station B2. In another embodiment, the endless transport path S may transport the sheet material counterclockwise in fig. 1 even if the sheet material is located below the flexible drive member 31, i.e., from the hot pressing station B1 defined between the first portion 1A and the second portion 1B, from below the second portion 1B and the third portion 2A to the 3D forming station B2 defined between the third portion 2A and the fourth portion 2B.

The two flexible transmission members 31 pass around the 2D side movable mold 111 and the movable frame 8 attached to the 3D side cavity plate 210. The two flexible transmission members 31 surround the 3D-side moving die 21 and the second presser plate 12 on different sides (front and rear sides in fig. 1) of the 3D-side moving die 21 and the second presser plate 12, respectively. The flexible transmission member 31 has a plurality of nibs 311 along its length, see in particular fig. 5. The plurality of nibs 311 are spaced apart from one another and, in addition, the plurality of nibs 311 may be divided into two groups, one on each flexible drive member 31 at the location corresponding to the hot press station B1 and the 3D forming station B2 for each forming cycle, i.e., left and right in fig. 1. The flexible drive member 31 is positioned to allow the first and second platens 11, 12 to press against the flexible drive member 31 so that the nibs 31 can penetrate the sheet material and thereby carry the sheet material and effect movement of the sheet material between the hot pressing station B1 and the 3D forming station B2.

In the embodiment shown in fig. 1, the flexible transmission member 31 is a transmission belt, and the second part 1B and the third part 2A are provided with a plurality of pulleys 32, and the transmission belt as the flexible transmission member 31 is in transmission engagement with the pulleys 32, wherein at least one of the pulleys 32 is driven by a motor 33 such as a servo motor. In the illustrated embodiment, one pulley 32 is provided at each of four corners above the second portion 1B and the third portion 2A, that is, four pulleys 32 are provided above the second portion 1B and the third portion 2A. The two belt wheels 32 close to the left side (left rear side and left front side) are respectively driven by a corresponding motor 33, and the other two belt wheels 32 are driven to rotate. Also provided below the second part 1B and the third part 2A are pulleys 32, for example one pulley 32 at each of the four corners, and the four pulleys 32 below may all be arranged to be driven in rotation.

The transmission belt as the flexible transmission member 31 has a plurality of transmission teeth 312 distributed along the length direction thereof, and the pulley 32 may be a gear, and the transmission belt with the transmission teeth 312 and the pulley 32 configured as the gear may be in mesh transmission.

The movable frame 8 can move the pulley 32a in the horizontal direction by driving of the air cylinder 81. For example, fig. 4 shows a state in which the movable frame 8 is moved to the rightmost position, in which the pulley 32a is moved to the rightmost position, and the belt as the flexible transmission member 31 is in a tightened state. While fig. 6 shows a state in which the movable frame 8 is moved to the leftmost position, the pulley 32a is moved to the leftmost position, and the belt as the flexible transmission member 31 is in a relatively slack state. The moving distance of the movable frame 8 is short, the flexible transmission member 31 can be adjusted by the self weight of the conveyor belt, and the state of being supported by the belt wheel 31 is always kept.

The operation of the lightweight trim composite sheet hot press molding die 10 is generally described below with reference to fig. 1.

First, the second part 1B of the press 1 and the injection mould 2 are first stationary and the first part 1A of the press 1 is moved to the left so that the first part 1A of the press 1 is open relative to the second part 1B, at which time the sheet material can be fed to the hot pressing station B1 between the first part 1A and the second part 1B by means of a tool such as a robot.

The first section 1A of press 1 then moves to the right against the second section 1B of press 1, thereby hot pressing the sheet at hot pressing station B1. During hot pressing, the sheet material is pierced by the nibs 311 and may be supported by the flexible drive 31.

The first part 1A of the press 1 is then moved to the left and opened again with respect to the second part 1B. Meanwhile, the entire press 1 (including the first and second parts 1A and 1B) and the third part 2A (including the 3D-side movable die 21) of the injection mold 2 may be moved leftward, that is, the third part 2A of the injection mold 2 is opened with respect to the fourth part 2B of the injection mold 2, that is, the 3D-side movable die 21 and the 3D-side fixed die 22 of the injection mold 2 are opened. After the 3D-side moving mold 21 and the 3D-side fixed mold 22 are opened, the flexible transmission member 31 of the transfer system 3 may transfer the sheet to the opened 3D molding station B2.

Then, the entire press 1 and the third portion 2A of the injection mold 2 are moved rightward, so that the 3D-side movable mold 21 and the 3D-side fixed mold 22 of the injection mold 2 are clamped to perform the injection molding process on the sheet at the 3D molding station B2.

Finally, the entire press 1 and the third portion 2A of the injection mold 2 are moved leftward again, the 3D side movable mold 21 and the 3D side fixed mold 22 of the injection mold 2 are opened, and the sheet subjected to the hot press molding and the integral injection molding can be taken out by using a tool such as a robot.

The above operation is only one example in which the lightweight garnish composite sheet hot-press molding die 10 can be embodied, and is not necessarily performed completely in accordance with the above steps. For example, in the actual process, some steps are performed simultaneously, so that the improvement of the working efficiency or other effects can be achieved, for example, immediately after the hot pressing of the sheet at the hot pressing station B1 is completed and then the first part 1A and the second part 1B of the press 1 are opened, the opening of the third part 2A and the fourth part 2B of the injection mold 2 and the conveyance of the sheet by the conveyance system 3 can be performed simultaneously as long as the opening speeds of the third part 2A and the fourth part 2B do not affect the conveyance of the sheet by the conveyance system 3.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.