Lightweight decorative member composite sheet thermoforming mold

Abstract

The present application provides a kind of lightweight decorative part composite sheet hot press forming die, wherein, press includes the first part and the second part being set as openable and closeable, the first part and the second part define hot press station between, and can be heated and plane preheating press process to sheet in the hot press station, injection mold includes the third part and the fourth part being set as openable and closeable, the third part and the fourth part define the 3D forming station of sheet between, and can be executed injection molding process on the sheet in the 3D forming station, transmission system includes two flexible transmission parts and wheel with flexible transmission part transmission cooperation, two flexible transmission parts are set as can carry sheet;Wherein, the second part and the third part are assembled back to back, and two flexible transmission parts define circulating transmission path, and circulating transmission path surrounds the second part and the third part.The present application can simplify the manufacturing process steps of decorative part, improve product quality and reduce production cost.

Description

Technical Field

[0001] This invention relates to molding dies, particularly to molding dies for automotive interior trim parts, and more specifically, to a thermoforming die for lightweight trim composite sheet materials. Background Technology

[0002] An interior trim piece for a vehicle includes a base and a cover layer. The base can be a fibrous (natural fiber and synthetic fiber) synthetic plastic part, and the cover layer is a leather material, providing the visible surface of the trim piece. A mold includes a 2D sheet heating and pre-pressing section and a 3D sheet molding and backing integral injection molding section. The 3D section has an upper mold and a lower mold, the upper mold providing a nozzle configured to provide a channel for injecting molten plastic into a mold cavity formed by the upper and lower molds. The leather material of the base and cover layer, after being heated and pre-pressed on the 2D side, is placed between the upper and lower molds via a transmission mechanism, and then injection molded onto the leather-covered base sheet. US2017015032A1 discloses such a trim piece.

[0003] Prior to injection molding of these decorative parts, the raw material for the overlay was a sheet material with an initial thickness of 8-10 mm. This sheet needed to be heated and compressed to a thinner thickness, such as 1.4-1.8 mm. The injection molding process was carried out while maintaining the heat of the sheet. Hot pressing and injection molding were handled separately; currently, hot pressing is performed on a vertical hot press, while injection molding is done on an injection molding machine independent of the hot press. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight decorative composite sheet hot pressing mold, which can simplify the manufacturing process of decorative parts.

[0005] This invention provides a lightweight decorative composite sheet hot pressing mold, comprising: a press, including a first part and a second part configured to be openable and closable, with a hot pressing station defined between the first part and the second part, where heating and planar preheating pressing processes can be performed on the sheet; an injection mold, including a third part and a fourth part configured to be openable and closable, with a 3D forming station defined between the third part and the fourth part, where injection molding processes can be performed on the sheet at the 3D forming station; and a transmission system, including two flexible transmission members and wheels that drive and cooperate with the flexible transmission members, the two flexible transmission members being configured to carry the sheet; wherein the second part and the third part are assembled back to back, the two flexible transmission members defining a circulating transmission path, the circulating transmission path surrounding the second part and the third part, to allow the sheet carried by the two flexible transmission members to be transferred from the hot pressing station to the 3D forming station.

[0006] In one embodiment, the first part includes a first pressure plate, the first pressure plate including a 2D side moving mold, the 2D side moving mold including a first heating plate; the second part includes a second pressure plate, the second pressure plate including a 2D side fixed mold, the 2D side fixed mold including a second heating plate; the third part includes a 3D side moving mold, the 3D side moving mold including a 3D side cavity plate; and the fourth part includes a 3D side fixed mold.

[0007] In one embodiment, the injection mold is a mold used in a horizontal injection molding machine, and the first pressure plate and the second pressure plate are configured to be installed and fixed on the template of the horizontal injection molding machine in the horizontal direction and can move relative to each other.

[0008] In one embodiment, the first pressure plate, the second pressure plate, and the 3D side moving mold are configured to move in the same direction to open the injection mold.

[0009] In one embodiment, the transfer system is configured to allow the sheet to move upward from the hot pressing station, bypass the top of the 2D side mold and the 3D molding side cavity plate, and then move downward into the 3D molding station.

[0010] In one embodiment, the first pressure plate has a pressure plate cavity, the first heating plate is disposed in the pressure plate cavity, and the press further includes a heating plate driving device for driving the first heating plate to move in the pressure plate cavity to achieve different hot pressing thickness requirements.

[0011] In one embodiment, the heating plate driving device includes a hydraulic cylinder; a guide groove is provided on the outer periphery of the first pressure plate, and an inclined groove is provided on the outer periphery of the first heating plate. The hydraulic cylinder is located on the outer periphery of the first pressure plate and passes through the guide groove via an inclined wedge, cooperating with the inclined groove. The movement of the inclined wedge causes the first heating plate to move in the pressure plate cavity.

[0012] In one embodiment, the flexible transmission element is a transmission belt, and multiple pulleys are mounted on the second part and the third part. The transmission belt and the pulleys are in transmission cooperation, and one of the pulleys is driven by a motor.

[0013] In one embodiment, the transmission belt has multiple transmission teeth distributed along its length, the pulley is a gear, and the transmission belt and the pulley can mesh and transmit power.

[0014] In one embodiment, the two flexible transmission members bypass the 2D side fixed mold and the movable frame mounted on the 3D side cavity plate. The flexible transmission members have a plurality of protrusions along their length direction. The flexible transmission members are positioned to allow the first pressure plate and the second pressure plate to press the flexible transmission members so that the protrusions penetrate the sheet and realize the movement of the sheet between the hot pressing station and the 3D forming station.

[0015] By using the aforementioned lightweight decorative composite sheet hot pressing mold, hot pressing and forming can be completed continuously in one step, thus simplifying the manufacturing process of decorative parts and making operation more convenient. Furthermore, using this lightweight decorative composite sheet hot pressing mold can also improve product quality, reduce production costs, and decrease processing costs and equipment investment. Attached Figure Description

[0016] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is an exploded view of the hot pressing mold for lightweight decorative composite sheet materials.

[0018] Figure 2 This is a cross-sectional view of a hot-pressing mold for lightweight decorative composite sheets.

[0019] Figure 3 This is a schematic diagram of a hot-pressing mold for lightweight decorative composite sheets.

[0020] Figure 4 This is a magnified view of a portion of the active frame.

[0021] Figure 5 This is a magnified view of a portion showing the protruding tip.

[0022] Figure 6 This is a magnified view showing the conveyor belt in a relaxed state. Detailed Implementation

[0023] The following discloses various implementations or embodiments of the described subject matter. To simplify the disclosure, specific examples of elements and arrangements are described below. These are merely examples and are not intended to limit the scope of protection of the invention. For instance, a first feature subsequently described in the specification being formed above or on a second feature can include implementations where the first and second features are formed in a direct connection, or implementations where an additional feature is formed between the first and second features, thus the first and second features may not be directly connected. Furthermore, reference numerals and / or letters may be repeated in different examples in these disclosures. This repetition is for brevity and clarity and does not in itself indicate a relationship between the various implementations and / or structures to be discussed. Further, when the first element is described in a manner connected or combined with a second element, the description includes implementations where the first and second elements are directly connected or combined with each other, as well as implementations where one or more other intervening elements are added to indirectly connect or combine the first and second elements with each other.

[0024] Generally speaking, the terms "comprising" and "including" only indicate that the steps and elements are explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements.

[0025] It should be noted that these and subsequent accompanying drawings are merely illustrative and are not drawn to scale, nor should they be construed as limiting the scope of protection of this invention. Furthermore, variations in different embodiments can be appropriately combined.

[0026] Figure 1 This is an exploded view of the lightweight decorative composite sheet hot pressing mold 10. Figure 2 This is a cross-sectional view of the lightweight decorative composite sheet hot pressing mold 10, with the cross-section located approximately in the middle of the lightweight decorative composite sheet hot pressing mold 10. Figure 3 The main focus is on the driving mechanism for the first heating plate 110. The lightweight decorative composite sheet hot pressing mold 10 can also be referred to as a lightweight decorative composite sheet hot pressing and back injection molding integrated mold.

[0027] like Figure 1 and Figure 2 As shown, the lightweight decorative composite sheet hot pressing mold 10 includes a press 1 and an injection mold 2, and also includes a transmission system 3.

[0028] The lightweight decorative composite sheet hot pressing mold 10 processes the sheet, which is not shown in the figure. The sheet is the workpiece processed by the mold, such as the surface layer of the decorative part. It can be leather material or other sheet material, such as NPFF (hemp fiber and PP material), or a combination of the two sheets integrally molded.

[0029] The press 1 includes a first part 1A and a second part 1B configured to be openable and closable. A hot pressing station B1 is defined between the first part 1A and the second part 1B, where a heating and planar preheating pressing process, also known as a 2D hot pressing process, can be performed on the sheet. This hot pressing process can correct the thickness of the sheet and heat and dry the sheet to a set temperature. The first part 1A and the second part 1B can move relative to each other to open and close, thereby hot pressing the sheet and venting air.

[0030] See Figure 2 The press 1 may include a first heating plate 110 and a second heating plate 120 configured to be openable and closable. In the illustrated embodiment, the first part 1A of the press 1 includes a first pressure plate 11, and the second part 1B of the press 1 includes a second pressure plate 12. The first pressure plate 11 may also be referred to as a 2D side-moving mold, and the second pressure plate 12 may also be referred to as a 2D side-fixed mold. The first pressure plate 11 includes a 2D side-moving mold 111, which includes the first heating plate 110, while the second pressure plate 12 includes a 2D side-fixed mold 122, which includes the second heating plate 120. The first pressure plate 11 and the second pressure plate 12 are configured to be in the horizontal direction ( Figure 2 The heating plates 110 and 120 can move relative to each other in the left-right direction, allowing them to open and close horizontally for placing or hot-pressing sheet materials. For example, heating plates 110 and 120 can both be made of steel and inlaid with heating wires, thermocouples, etc., to provide heat and control. The surfaces of the heating plates in contact with the sheet materials can be treated with an anti-stick coating to prevent the heated sheet materials from sticking and being demolded.

[0031] See Figure 1 and Figure 2 The first part 1A, from left to right, includes a machine mounting plate 15 and heat insulation plates 13 and 14 connected to each other. For example, the machine mounting plate 15 can be fixedly connected to a movable first frame (not shown in the figure) in the lightweight decorative composite sheet thermoforming mold 10, and moves with the first frame. The heat insulation plates 13 and 14 and the first heating plate 110 can be fixed to the machine mounting plate 15, so the first pressure plate 11 can move as a whole with the movement of the first frame (e.g., ...). Figure 1In the middle, it moves in the left and right direction, thereby realizing the opening and closing action with the second pressure plate 12, that is, realizing the opening and closing action of the first heating plate 110 and the second heating plate 120, so that the sheet is placed when it is open and the sheet is hot-pressed when it is closed.

[0032] See Figure 1 and Figure 2 The first pressure plate 11 has a pressure plate cavity A1. A first heating plate 110 is disposed in the pressure plate cavity A1 of the first pressure plate 11 and can move within the pressure plate cavity A1, for example, by being driven by a heating plate driving device 5, which will be described below. During the left-right movement of the first heating plate 110, it can compress the gas inside the pressure plate cavity A1, thereby facilitating the escape of the internal gas, especially the water vapor generated during the hot pressing process, from the pressure plate cavity A1 (e.g., from...). Figure 1 The air is discharged through the pores on the upper side of the first pressure plate 11, thus avoiding any impact on subsequent molding processes and resulting in better molding quality. Moreover, the first heating plate 110 can move independently within the pressure plate cavity A1 of the first pressure plate 11, and can also adapt to the requirements of sheets of different thicknesses and materials, providing convenience for product designs with different wall thicknesses or requirements.

[0033] Figure 2 In this embodiment, the second heating plate 120 is fixed relative to the second pressure plate 12. In another embodiment, the second heating plate 120 may also be similar to the first heating plate 110 and be movable within the pressure cavity of the second pressure plate 12.

[0034] As mentioned above, the press 1 may also include a heating plate driving device 5, which can drive the first heating plate 110 to move within the pressing chamber A1 to achieve different hot-pressing thicknesses. See, for example... Figure 3 , Figure 3 It shows from Figure 2 An example construction of the lightweight decorative composite sheet hot pressing mold 10 is shown when viewed from above, with the heating plate drive device 5 shown. Figure 3 In the figure, the heating plate driving device 5 includes two oil cylinders 51 (two oil cylinders 51 located on the front and rear sides respectively). A guide groove 114 is provided on the outer periphery of the first pressure plate 11 (which can also be combined with...). Figure 1 A groove 116 is provided on the outer periphery of the first heating plate 110. The cylinder 51 of the heating plate driving device 5 is located on the outer periphery of the first pressure plate 11, and passes through the guide groove 114 via a wedge 6, engaging with the groove 116 (specifically, the inclined surface 61 of the wedge 6 engages with the inclined surface of the groove 116). The movement of the wedge 6 causes the first heating plate 110 to move within the pressure plate cavity A1. Figure 3Taking the hydraulic cylinder 51 located at the front as an example, when the hydraulic cylinder 51 drives the wedge 6 to move to the rear, the wedge 6 and the inclined groove 116 will cooperate to push the first heating plate 110 to move to the right. The first heating plate 110 can also be connected to the cavity wall of the pressure plate cavity A1 by an elastic element such as a spring, so that when the wedge 6 is pulled out from the guide groove 114, the first heating plate 110 can return to its original position under the action of elasticity.

[0035] Continue back Figure 1 and Figure 2 The injection mold 2 includes a third part 2A and a fourth part 2B that are configured to open and close. A 3D molding station B2 for sheet metal is defined between the third part 2A and the fourth part 2B, and the sheet metal can be placed at the 3D molding station B2 to perform an injection molding process, or 3D molding operation, on the sheet metal at the 3D molding station B2. The third part 2A and the fourth part 2B can also move relative to each other to open and close. When the third part 2A and the fourth part 2B are open, the sheet metal can be transferred from the aforementioned hot pressing station B1 to the 3D molding station B2 via a transfer system 3, which will be described in detail below. Then, the third part 2A and the fourth part 2B close, and the injection molding process is performed on the sheet metal at the 3D molding station B2.

[0036] Injection mold 2 includes a 3D side moving mold 21 and a 3D side fixed mold 22 configured to be openable and closable. In the illustrated embodiment, the 3D side moving mold 21 may be included in the third part 2A, and the 3D side fixed mold 22 may be included in the fourth part 2B. At the 3D molding station B2, the 3D side moving mold 21 and the 3D side fixed mold 22 can be closed and an injection molding process can be performed on the sheet. In the figure, the fourth part 2B also includes, from left to right, a first ejector plate 23, 24, a hot runner mold 25, a second ejector plate 26, 27 (the second ejector plate 27 also functions as a mold spacer), and a machine fixing plate 28 connected to each other. For example, the 3D side fixed mold 22, the first ejector plate 23, 24, the hot runner mold 25, and the second ejector plate 26, 27 are fixed to the machine fixing plate 28, and the machine fixing plate 28 is fixed to a base (not shown) in the lightweight decorative composite sheet thermoforming mold 10, thus the 3D side fixed mold 22 is fixed to the base. The 3D side moving mold 21 can move left and right relative to the 3D side fixed mold 22 through the drive mechanism, thereby realizing the opening and closing action.

[0037] See Figure 4 Part 2A includes a 3D-molded side cavity plate 210. A movable frame 8 is mounted on the 3D-molded side cavity plate 210, and the movable frame 8 is driven by a corresponding driving mechanism, for example... Figure 4The cylinder 81 drives the 3D forming side cavity plate 210 to move horizontally relative to the other parts of the third part 2A, thereby assisting in the forming process during the 3D side hot pressing forming when the mold is closed. The movable frame 8 can also be called a sheet hot pressing forming auxiliary pressure frame. The fourth part 2B may also include a sheet hot pressing forming auxiliary pressure frame similar to the movable frame 8.

[0038] The second part 1B of the press 1 and the third part 2A of the injection mold 2 are assembled back to back. The back sides of the second part 1B (or the second pressure plate 12) and the third part 2A (or the 3D side moving mold 21) can be separated by a heat insulation plate 4 to prevent them from affecting each other.

[0039] exist Figure 1 and Figure 2 In this design, the press 1 and injection mold 2 open and close horizontally, which is particularly suitable for the production of precision decorative parts, or large and precise decorative parts. For small decorative parts, the press 1 and injection mold 2 can be configured vertically, meaning their opening and closing direction is vertical. For precision or large decorative parts, considering the weight of the mold, which increases the difficulty of precise control, a horizontally configured press 1 and injection mold 2 are recommended.

[0040] Press 1 and injection mold 2 can employ known hot press structures and known injection mold constructions. For example, injection mold 2 can use a mold known for use with horizontal injection molding machines, and press 1 can employ a construction similar to a vertical hot press. Figure 1 and Figure 2 In this embodiment, the 3D side-moving mold 21 of the press 1 and the injection mold 2 (or, the first part 1A, the second part 1B, and the third part 2A) can be moved as a whole to the left. This movement is guided by a guiding mechanism not shown in the figure, for example, through the cooperation of holes and guide pillars. In an embodiment where the injection mold 2 is a mold used on a horizontal injection molding machine, the press 1 can be mounted on the horizontal injection molding machine. Figure 1 and Figure 2 In this design, the opening and closing directions of the press 1 and the injection mold 2 are horizontal. The first pressure plate 11 (or the first part 1A) and the second pressure plate 12 (or the second part 1B) of the press 1 are configured to open and close in the same direction as the 3D side moving mold 21 (or the third part 2A) of the injection mold 2. Figure 1 and Figure 2 In the middle, to the left) move to open the injection mold 2. For example, it could be that the press 1 uses the second frame of a horizontal injection molding machine, which includes the injection mold 2, as a carrier, and moves along... Figure 1 and Figure 2The press 1 moves in the left and right directions. For example, the first pressure plate 11 and the second pressure plate 12 of the press 1 are configured to be mounted and fixed in the horizontal direction on the template of the horizontal injection molding machine including the injection mold 2, which can move in the horizontal direction relative to other parts of the horizontal injection molding machine.

[0041] See also Figure 1 and Figure 2 The following describes the transmission system 3. The transmission system 3 includes two flexible transmission members 31, and wheels 32 that engage with the flexible transmission members 31. The two flexible transmission members 31 are configured to carry the sheet material. "Flexible transmission member" means that the transmission member can deform and return to its original shape.

[0042] Two flexible transmission members 31 define a circulating transmission path S. The circulating transmission path S surrounds the second part 1B and the third part 2A to allow the sheet material carried by the two flexible transmission members 31 to be transferred from the hot pressing station B1 to the 3D molding station B2. Figure 1 The diagram only schematically illustrates the cyclic transmission path S, which can revolve around... Figure 1 The sheet is transported clockwise, meaning that the sheet moves from the hot pressing station B1 defined between the first part 1A and the second part 1B, around the second part 1B and the third part 2A, to the 3D forming station B2 defined between the third part 2A and the fourth part 2B. In other words, the transport system 3 is configured to allow the sheet to move upward from the hot pressing station B1, around the top of the 2D side fixed mold 122 (or, the second part 1B) and the 3D forming side cavity plate 210 (or, the third part 2A), and then downward into the 3D forming station B2. In another embodiment, the cyclic transport path S can also be used to keep the sheet from leaving the flexible transmission member 31 even when the sheet is located below it. Figure 1 The sheet is transferred in a counterclockwise direction, that is, the sheet moves from the hot pressing station B1 defined between the first part 1A and the second part 1B to the 3D forming station B2 defined between the third part 2A and the fourth part 2B from below the second part 1B and the third part 2A.

[0043] Two flexible transmission components 31 bypass the 2D side moving mold 111 and the movable frame 8 mounted on the 3D side cavity plate 210. The two flexible transmission components 31 are located on different sides of the 3D side moving mold 21 and the second pressure plate 12. Figure 1 The front and rear sides of the flexible transmission member 31 surround the 3D side moving mold 21 and the second pressure plate 12. The flexible transmission member 31 has multiple protrusions 311 along its length, as shown in detail in [reference needed]. Figure 5 Multiple protrusions 311 are spaced apart from each other. Furthermore, the multiple protrusions 311 can be divided into two groups, located on the flexible transmission component 31 at positions corresponding to the hot pressing station B1 and the 3D forming station B2 in each forming cycle, respectively. Figure 1The left and right sides of the sheet. The position of the flexible transmission member 31 is set to allow the first pressure plate 11 and the second pressure plate 12 to press the flexible transmission member 31 so that the protrusion 31 can penetrate the sheet, thereby carrying the sheet and realizing the movement of the sheet between the hot pressing station B1 and the 3D forming station B2.

[0044] Figure 1 In the illustrated embodiment, the flexible transmission element 31 is a transmission belt. Multiple pulleys 32 are mounted on the second part 1B and the third part 2A. The transmission belt, acting as the flexible transmission element 31, engages with the pulleys 32 for transmission. At least one pulley 32 is driven by a motor 33, such as a servo motor. In the illustrated embodiment, a pulley 32 is positioned at each of the four corners above the second part 1B and the third part 2A, meaning four pulleys 32 are positioned above the second part 1B and the third part 2A. Corresponding to the two flexible transmission elements 31, the two pulleys 32 closest to the left (left rear and left front) are driven by their respective motors 33, while the other two pulleys 32 rotate passively. Pulleys 32 are also positioned below the second part 1B and the third part 2A, for example, one pulley 32 at each of the four corners. The four pulleys 32 below can all be configured to rotate passively.

[0045] The transmission belt, which serves as a flexible transmission component 31, has multiple transmission teeth 312 distributed along its length, while the pulley 32 can be a gear. The transmission belt with transmission teeth 312 and the pulley 32, which is constructed as a gear, can mesh and transmit power.

[0046] The movable frame 8 can be driven by the cylinder 81 to move the pulley 32a horizontally. For example, Figure 4 The diagram shows the state when the movable frame 8 is moved to the rightmost position. At this point, the pulley 32a is at the rightmost position, and the conveyor belt, which serves as the flexible transmission component 31, is taut. Figure 6 The diagram shows the state when the movable frame 8 is moved to the leftmost position. At this point, the pulley 32a is at the leftmost position, and the conveyor belt, which serves as the flexible transmission component 31, is in a relatively relaxed state. Because the movable frame 8 moves a short distance, the flexible transmission component 31 can be adjusted using the weight of the conveyor belt itself, always maintaining a state where it can be supported by the pulley 31.

[0047] The following reference Figure 1 The operation of the lightweight decorative composite sheet hot pressing mold 10 is briefly described.

[0048] First, the second part 1B of the press 1 and the injection mold 2 remain stationary. The first part 1A of the press 1 moves to the left, so that the first part 1A of the press 1 opens relative to the second part 1B. At this time, the sheet material can be sent to the hot pressing station B1 between the first part 1A and the second part 1B using tools such as a robotic arm.

[0049] Then, the first part 1A of the press 1 moves to the right and comes into contact with the second part 1B of the press 1, thereby hot-pressing the sheet material at the hot pressing station B1. During the hot pressing process, the sheet material is pierced by the protrusion 311, and the sheet material can be supported by the flexible transmission member 31.

[0050] Then, the first part 1A of the press 1 moves to the left, opening again relative to the second part 1B. Simultaneously, the entire press 1 (including the first part 1A and the second part 1B) and the third part 2A of the injection mold 2 (including the 3D side moving mold 21) can move to the left, meaning the third part 2A of the injection mold 2 opens relative to the fourth part 2B, i.e., the 3D side moving mold 21 and the 3D side fixed mold 22 of the injection mold 2 open. After the 3D side moving mold 21 and the 3D side fixed mold 22 open, the flexible transmission component 31 of the transmission system 3 can transfer the sheet material to the opened 3D forming station B2.

[0051] Then, the press 1 as a whole and the third part 2A of the injection mold 2 move to the right, so that the 3D side moving mold 21 and the 3D side fixed mold 22 of the injection mold 2 close together to perform injection molding on the sheet material at the 3D forming station B2.

[0052] Finally, the press 1 as a whole and the third part 2A of the injection mold 2 move to the left again, and the 3D side moving mold 21 and the 3D side fixed mold 22 of the injection mold 2 open, so that the sheet material that has been thermoformed and integrally injection molded can be taken out using tools such as robotic arms.

[0053] The above operation is merely an example of what can be implemented in the lightweight decorative composite sheet hot pressing mold 10, and it is not necessary to follow the steps exactly. For example, in actual processing, some steps can be performed simultaneously to improve work efficiency or achieve other effects. For instance, immediately after the sheet is hot-pressed at the hot pressing station B1 and 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 transfer of the sheet by the transfer system 3 can be carried out simultaneously, as long as the opening speed of the third part 2A and the fourth part 2B does not affect the transfer of the sheet by the transfer system 3.

[0054] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A lightweight decorative composite sheet hot pressing mold, characterized in that, include: A press includes a first part and a second part configured to be openable and closable, a hot pressing station defined between the first part and the second part, wherein a heating and planar preheating pressing process can be performed on a sheet material at the hot pressing station. Injection mold, including a third and a fourth portion configured to be openable, defining a 3D forming station for a sheet between the third and fourth portions, and performing an injection molding process on the sheet at the 3D forming station. as well as The transmission system includes two flexible transmission components and a wheel that drives the flexible transmission components. The two flexible transmission components are configured to carry a sheet material. The second part and the third part are assembled back to back, and two flexible transmission members define a cyclic transmission path that surrounds the second part and the third part to allow the sheet material carried by the two flexible transmission members to be transferred from the hot pressing station to the 3D forming station.

2. The lightweight decorative composite sheet hot pressing mold as described in claim 1, characterized in that, The first part includes a first pressure plate, the first pressure plate including a 2D side moving mold, the 2D side moving mold including a first heating plate; the second part includes a second pressure plate, the second pressure plate including a 2D side fixed mold, the 2D side fixed mold including a second heating plate; The third part includes a 3D side moving mold, which includes a 3D side cavity plate, and the fourth part includes a 3D side fixed mold.

3. The lightweight decorative composite sheet hot pressing mold as described in claim 2, characterized in that, The injection mold is a mold used in a horizontal injection molding machine. The first pressure plate and the second pressure plate are configured to be installed and fixed on the template of the horizontal injection molding machine in the horizontal direction and can move relative to each other.

4. The lightweight decorative composite sheet hot pressing mold as described in claim 3, characterized in that, The first pressure plate, the second pressure plate, and the 3D side moving mold are configured to move in the same direction to open the injection mold.

5. The lightweight decorative composite sheet hot pressing mold as described in claim 3, characterized in that, The transmission system is configured to allow the sheet to move upward from the hot pressing station, bypass the top of the 2D side mold and the 3D molding side cavity plate, and then move downward into the 3D molding station.

6. The lightweight decorative composite sheet hot pressing mold as described in claim 2, characterized in that, The first pressure plate has a pressure plate cavity, and the first heating plate is disposed in the pressure plate cavity. The press also includes a heating plate driving device, which is used to drive the first heating plate to move in the pressure plate cavity to achieve different hot pressing thickness requirements.

7. The lightweight decorative composite sheet hot pressing mold as described in claim 6, characterized in that, The heating plate driving device includes a hydraulic cylinder; a guide groove is provided on the outer periphery of the first pressure plate, and an inclined groove is provided on the outer periphery of the first heating plate. The hydraulic cylinder is located on the outer periphery of the first pressure plate and passes through the guide groove via an inclined wedge, cooperating with the inclined groove. The movement of the inclined wedge causes the first heating plate to move in the pressure plate cavity.

8. The lightweight decorative composite sheet hot pressing mold as described in claim 1, characterized in that, The flexible transmission component is a transmission belt. Multiple pulleys are installed on the second part and the third part. The transmission belt and the pulleys are in transmission cooperation. One of the pulleys is driven by a motor.

9. The lightweight decorative composite sheet hot pressing mold as described in claim 8, characterized in that, The transmission belt has multiple transmission teeth distributed along its length, the pulley is a gear, and the transmission belt and the pulley can mesh and transmit power.

10. The lightweight decorative composite sheet hot pressing mold as described in claim 2, characterized in that, The two flexible transmission components bypass the 2D side fixed mold and the movable frame installed on the 3D side cavity plate. The flexible transmission components have multiple protrusions along their length direction. The flexible transmission components are positioned to allow the first pressure plate and the second pressure plate to press the flexible transmission components so that the protrusions penetrate the sheet and realize the movement of the sheet between the hot pressing station and the 3D forming station.

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