A method of integrally forming a multi-material carrier tray

Abstract

The present application relates to a kind of multi-material carrying tray integrated forming method, comprising the following steps: (a) carbon fiber plate material is machined to be processed into the size and shape required, obtain the bottom plate;(b) the bottom plate is heated and softened, bury in preheated forming mold;The preheating temperature of the forming mold is 130~180 ℃;(c) using the injection head of injection molding machine, poly (carbonate) is injected into the forming mold with fiber reinforcement to adhere at the edge of the bottom plate, cooling forming to obtain the peripheral wall;(d) using another injection head of injection molding machine, TPU is injected into the forming mold, and after cooling, forming can be obtained. Thus, products meeting different performance requirements can be obtained, thereby greatly reducing the complexity of manufacturing process, improving efficiency, reducing cost, and forming large-scale batch industrialization capacity.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molding, and relates to a one-piece forming method, in particular to a one-piece forming method of a multi-material bearing tray. BACKGROUND

[0002] Injection molding technology is a method for manufacturing plastic products, which is a technology for obtaining various plastic parts by injecting molten plastic into a plastic product mold through pressure and cooling forming. Injection molding is a relatively mature technical field, and its product field involves many aspects. In recent years, traditional injection molding has shifted from plastic materials to fiber reinforced materials (such as glass fiber and carbon fiber) to meet the diversity and complexity of product performance. At the same time, product structures have become more complex, and performance requirements have become higher: higher requirements for weight, strength, stiffness, and manufacturing process efficiency and cost, and single material products are difficult to meet the above requirements.

[0003] In some special fields, the performance requirements of many products are composite performance, such as notebook computer shells and automobile interior and exterior parts. For example, the notebook computer shell needs higher strength in some local parts to bear the load, needs more stable structure in some positions to obtain better stiffness, and needs to meet the performance of sensory aspects such as noise reduction and hand feeling in some parts. The traditional process technology is to use corresponding materials to manufacture parts respectively, and then connect (bonding, welding, etc.) the parts through fixtures to obtain the parts, which is relatively complex, has more steps, a long cycle, high process cost, and high precision requirements for size tolerance. SUMMARY

[0004] The application aims to overcome the deficiencies of the prior art and provide a one-piece forming method of a multi-material bearing tray.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a one-piece forming method of a multi-material bearing tray, the bearing tray comprising a bottom plate, a peripheral wall formed at the edge of the bottom plate and perpendicular to the bottom plate, and a buffer formed at the four corners of the peripheral wall and extending to the bottom plate, the bottom plate being a carbon fiber plate, the peripheral wall being a fiber-reinforced polycarbonate, and the buffer being a TPU material,

[0006] comprising the following steps:

[0007] (a) machining the carbon fiber plate to obtain the bottom plate with the required size and shape;

[0008] (b) heating and softening the bottom plate and embedding it into a preheated forming mold; the preheating temperature of the forming mold is 130-180 DEG C;

[0009] (c) injecting fiber-reinforced polycarbonate into the forming mold using an injection head of the injection molding machine to adhere at the edge of the base plate, and cooling to form the peripheral wall;

[0010] (d) injecting TPU into the forming mold using another injection head of the injection molding machine, and cooling to form.

[0011] Optimally, in step (a), positioning holes are processed at the four corners of the base plate; and the carbon fiber plate is also edge-milled and the rolled edge is removed.

[0012] Further, in step (b), the base plate is placed on a positioning jig, and a mechanical hand is used to transfer it to an IR furnace positioning tray, the position of the positioning tray is adjusted so that the upper and lower parts are independently 3-5 cm away from the upper and lower heating plates; after softening, it is taken out from the IR furnace positioning tray by the mechanical hand; the distance between the upper and lower heating plates is 8-12 cm.

[0013] Further, in step (b), the temperature in the furnace of the IR furnace is 290-320°C, and the heating time is 30-40 s, and the out-of-furnace temperature of the base plate is 220-280°C; in step (c), the temperature after cooling is 50-80°C.

[0014] Optimally, the forming mold comprises:

[0015] At least one lower fixing assembly, the lower fixing assembly comprising a lower fixing plate, a second ejection plate movable relative to the lower fixing plate, a first ejection plate movably arranged between the lower fixing plate and the second ejection plate, a supporting plate arranged in spaced relation to the first ejection plate, a plurality of supporting columns connected between the supporting plate and the lower fixing plate and penetrating through the first ejection plate and the second ejection plate, a plurality of ejection rods penetrating through the supporting plate and extending to the first ejection plate, a male mold plate arranged on the supporting plate, a male mold core embedded in the male mold plate, and a core pulling pin mounted on the supporting plate and penetrating through the male mold plate and the male mold core;

[0016] A first upper fixing assembly and a second upper fixing assembly, the first upper fixing assembly and the second upper fixing assembly being respectively mounted on two lower fixing assemblies and each independently comprising an upper fixing plate, a hot runner plate mounted on the surface of the upper fixing plate and facing the lower fixing assembly, a female mold plate mounted on the surface of the hot runner plate, and a female mold core embedded in the female mold plate and cooperating with the male mold core,

[0017] One jet flow channel and two jet flow channels are respectively formed between the male mold core and the female mold core, and a plurality of injection heads corresponding to the one jet flow channel and the two jet flow channels are formed on the hot runner plate.

[0018] Optimally, the first and second ejection plates are connected by an opening and closing structure, which includes a buckle arranged on the side of the first and second ejection plates, a guide block with one end fixed on the side of the support plate and the other end extending to match the buckle, and a limiting block installed on the side of the second ejection plate by a spring and matched with the buckle and the guide block respectively.

[0019] Further, the end of the limiting block is provided with a first inclined surface, and the end of the guide block is provided with a second inclined surface matched with the first inclined surface.

[0020] Further, a return spring is arranged on each of the ejection rods, and the return spring is located between the support plate and the second ejection plate.

[0021] Further, the first and second upper fixing assemblies further independently include a plurality of sliding blocks arranged between the female mold plate and the male mold plate and surrounding the core pulling sub, and a sliding block guide block arranged between the female mold plate and the male mold plate and corresponding to the outside of the plurality of sliding blocks.

[0022] Further, the lower fixing assembly further includes an ejection plate guide column installed on the lower fixing plate and extending to connect with the support plate, and a reset rod installed on the second ejection plate and extending to penetrate the male mold plate.

[0023] Due to the use of the above technical solutions, the present application has the following advantages compared with the prior art: the method for integrally forming the multi-material bearing tray can obtain products meeting different performance requirements by softening the carbon fiber plate material and then performing double-color injection molding, thereby greatly reducing the complexity of the manufacturing process, improving the efficiency, reducing the cost, and forming large-scale batch industrialization capacity. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structural schematic view of the multi-material bearing tray of the present application;

[0025] Figure 2 FIG. 2 is a structural schematic view of another perspective of the multi-material bearing tray of the present application;

[0026] Figure 3 FIG. 3 is a structural schematic view of the bottom plate in the multi-material bearing tray of the present application;

[0027] Figure 4 FIG. 4 is a simple diagram of the production system of the multi-material bearing tray of the present application;

[0028] Figure 5 FIG. 5 is a schematic view of part of the forming mold structure of the multi-material bearing tray of the present application;

[0029] Figure 6 Another part structure of the forming die for the multi-material carrying tray of the present application;

[0030] Figure 7 Structure diagram of the core structure of the forming die for the multi-material carrying tray of the present application;

[0031] Figure 8 Another part structure of the forming die for the multi-material carrying tray of the present application (open mold);

[0032] Figure 9 Another part structure of the forming die for the multi-material carrying tray of the present application (open mold) in the ejection state;

[0033] Figure 10 Structure diagram of the hot runner plate of the forming die for the multi-material carrying tray of the present application;

[0034] Figure 11 Structure diagram of another hot runner plate of the forming die for the multi-material carrying tray of the present application. DETAILED DESCRIPTION

[0035] The present application will be further described below in connection with the embodiments shown in the accompanying drawings.

[0036] As shown in Figure 1 and Figure 2 , the carrying tray mainly comprises a bottom plate 1', a peripheral wall 2' and a buffer 3', etc. The bottom plate 1' is a carbon fiber plate, and positioning holes 11' are usually formed at the four corners thereof (as shown in Figure 3 ); the peripheral wall 2' is formed at the edge of the bottom plate 1' (here, it is integrally injection molded), and is perpendicular to the bottom plate 1', and is made of fiber-reinforced polycarbonate; the buffer 3' is formed at the four corners of the peripheral wall 2' and extends to the outer surface of the bottom plate 1', and is made of TPU (of course, other existing injection materials can also be selected according to needs).

[0037] The method for integrally forming the multi-material carrying tray comprises the following steps:

[0038] (a) machine processing the carbon fiber plate material to process into the required size and shape to obtain the bottom plate 1'; in this embodiment, positioning holes 11' are machined at the four corners of the bottom plate 1', so that the bottom plate 1' can be placed on a positioning jig to facilitate its transfer by a robot hand; during the machining, the carbon fiber plate material is usually also edge-milled, and then the burrs are removed.

[0039] (b) The base plate 1' is heated and softened (heated in an IR furnace at a temperature of 290–320°C for 30–40 seconds), then removed (at a furnace temperature of 220–280°C) and embedded in a preheated molding die; the preheating temperature of the molding die is 130–180°C. In this embodiment, the base plate 1' is placed on a positioning fixture and transferred to the IR furnace positioning tray using a robotic arm. The position of the positioning tray is adjusted so that the distances between its upper and lower parts and the upper and lower heating plates are independently 3–5 cm (i.e., the distance between the upper surface of the positioning tray and the upper heating plate is 3–5 cm, the distance between the lower surface of the positioning tray and the lower heating plate is 3–5 cm, and the distance between the entire upper and lower heating plates is 8–12 cm); after heating and softening, it is removed from the IR furnace positioning tray using a robotic arm.

[0040] (c) Using an injection head of an injection molding machine, fiber-reinforced polycarbonate is injected into a molding die to adhere to the edge of the base plate 1', and cooled (temperature is 50-80°C) to form the peripheral wall 2';

[0041] (d) Inject TPU into the mold using another injection head of the injection molding machine, and then allow it to cool and solidify.

[0042] Specifically,

[0043] The support tray can be manufactured using an existing dual-injection molding machine system (with a corresponding molding die) (such as the one disclosed in Chinese invention patent application number 201810615891.X or a commercially available conventional one). For example, the dual-injection molding machine system (i.e., the aforementioned injection molding machine) can... Figure 4 As shown, the system includes a base 1, a molding die unit 2 mounted on the base 1, and an injection unit 3 mounted on the base 1 and cooperating with the molding die unit 2. The molding die unit 2 includes a rotatable male mold base 21 (the rotation axis of the male mold base 21 is horizontally oriented), a drive unit 24 mounted on the base 1 and connected to the male mold base 21 for driving the male mold base 21 to rotate, a female mold base 22 that is openably mounted on and cooperating with the male mold base 21, and a molding die 23 disposed between the male mold base 21 and the female mold base 22. The injection unit 3 has an independent single-shot injection mechanism 31 (i.e., including one injection head) and a double-shot injection mechanism 32 (the single-shot injection mechanism 31 and the double-shot injection mechanism 32 are spaced apart; existing mechanisms can be used; and it includes another injection head). The inventive point of this application is not the specific structure of the dual-shot injection molding machine system and the injection unit 3, etc.; the foregoing description is to more comprehensively and clearly demonstrate the working principle of the molding die 23.

[0044] In this embodiment, as Figures 5-6 , Figures 8-9The shown forming die 23 mainly comprises a lower fixed assembly 231, a first upper fixed assembly 232 and a second upper fixed assembly 232'.

[0045] The lower fixed assembly 231 has at least one, in this application, two lower fixed assemblies 231 are used to improve production efficiency, and are used to fix the first upper fixed assembly 232 and the second upper fixed assembly 232', respectively. Each lower fixed assembly 231 comprises a lower fixed plate 2311, a first ejection plate 2312, a second ejection plate 2313, a bearing plate 2314, an ejection rod 2315, a male die core 2317, a male die plate 2318 and a core pulling pin 2319, etc. In use, the lower fixed plate 2311 is installed on the male die seat 21 through conventional fasteners; the second ejection plate 2313 can move up and down relative to the lower fixed plate 2311 (the definition of up and down direction is according to the direction of the arrow in the drawing) Figure 5The lower fixed assembly 231 is provided with a plurality of support columns 2310, which are connected between the lower fixed plate 2311 and the support plate 2314 and penetrate the first ejection plate 2312 and the second ejection plate 2313, thereby supporting the first ejection plate 2312 and the second ejection plate 2313. The lower fixed assembly 231 is also provided with a plurality of ejection rods 2315, which penetrate the support plate 2314 and are connected to the first ejection plate 2312, i.e., one end of the ejection rod 2315 is located in the first ejection plate 2312 and extends vertically upward and penetrates the support plate 2314, so that when the first ejection plate 2312 is moved upward under the action of an external force, the ejection rod 2315 is synchronously moved upward. The lower fixed assembly 231 is provided with a male mold plate 2318, which is located on the upper surface of the support plate 2314, i.e., the upper surface of the male mold plate 2318 is in contact with the end surface of the ejection rod 2315, so that when the ejection rod 2315 is moved upward, the male mold plate 2318 is synchronously lifted upward. The lower fixed assembly 231 is provided with a male mold core 2317, which is embedded in the male mold plate 2318, i.e., the upper surface of the male mold plate 2318 is provided with a first accommodating cavity recessed inward, so that the male mold core 2317 is located in the first accommodating cavity (the male mold core 2317 can be detachably installed in the first accommodating cavity by using a conventional fastener). The lower fixed assembly 231 is provided with a core pulling insert 2319, which is installed on the support plate 2314 and extends upward and penetrates the male mold plate 2318 and the male mold core 2317, so that the upper surface of the core pulling insert 2319 protrudes from the male mold plate 2318 and the male mold core 2317; the core pulling insert 2319 and the male mold core 2317 cooperate to form a structure corresponding to the peripheral wall 2' of the bearing tray (so that the peripheral wall 2' of the bearing tray can be formed after injection molding).

[0046] The first upper fixing assembly 232 and the second upper fixing assembly 232' are substantially identical in structure, but the runner structure of the hot runner plate 2322, the hot runner plate 2322', the structure of the first runner and the second runner are slightly different. The first upper fixing assembly 232 and the second upper fixing assembly 232' are respectively installed on two lower fixing assemblies 231, that is, the first upper fixing assembly 232 is installed on one lower fixing assembly 231 and the second upper fixing assembly 232' is installed on the other lower fixing assembly 231. The first upper fixing assembly 232 comprises an upper fixing plate 2321 (at this time, the upper fixing plate 2321 is located above the male mold plate 2318), a hot runner plate 2322 installed on the surface of the upper fixing plate 2321 and facing the lower fixing assembly 231, a female mold plate 2323 installed on the surface of the hot runner plate 2322 (the lower surface of the hot runner plate 2322), and a female mold core 2324 embedded in the female mold plate 2323 and matched with the male mold core 2317 (the lower surface of the female mold plate 2323 is also recessed to form a second accommodating cavity, and the female mold core 2324 can be detachably installed in the second accommodating cavity through existing conventional fasteners). The second upper fixing assembly 232' also comprises an upper fixing plate 2321', a hot runner plate 2322' installed on the surface of the upper fixing plate 2321' and facing the lower fixing assembly 231, a female mold plate 2323' installed on the surface of the hot runner plate 2322', and a female mold core 2324' embedded in the female mold plate 2323' and matched with the male mold core 2317 (in use, the bottom plate 1' passes through). In this embodiment, the surface of the female mold core 2324 and the female mold core 2324' is formed with a limiting protrusion corresponding to the positioning hole 11', so that the bottom plate 1' is placed on the female mold core 2324 and the female mold core 2324', as shown in Figure 7 . At this time, the male mold core 2317 and the female mold core 2324, the female mold core 2324' form a first runner and a second runner respectively, and the hot runner plate 2322, the hot runner plate 2322' have a hot runner plate body 23220, a hot runner plate body 23220' respectively, which are formed with a plurality of injection heads 23221, 23221' corresponding to the first runner and the second runner; it should be noted that the hot runner plate 2322 and the hot runner plate 2322' also independently form injection runners and are independently matched with injection auxiliary structures (such as injection electromagnetic valves) on the side surfaces, as shown in Figure 10 and Figure 11 . The introduced molding material can enter the first runner and the second runner through the hot runner plate 2322 and the hot runner plate 2322' respectively to form the peripheral wall 2' and the buffer 3' respectively.

[0047] Specifically, the first ejection plate 2312 and the second ejection plate 2313 are movably connected by a plurality of opening and closing structures 2316 (usually two or four symmetrically arranged) which include buckles 23161 clamped on the side of the first ejection plate 2312 and the second ejection plate 2313, guide blocks 23162 fixed on one side of the support plate 2314 and extending to the buckles 23161, and limiting blocks 23163 installed on the side of the second ejection plate 2313 by springs and matched with the buckles 23161 and the guide blocks 23162 respectively; the end of the limiting block 23163 is provided with a first inclined surface, and the end of the guide block 23162 is provided with a second inclined surface matched with the first inclined surface. Initially, the first ejection plate 2312 and the second ejection plate 2313 are clamped together under the cooperation of the buckles 23161 and the limiting blocks 23163; when the limiting blocks 23163 move upward, the first inclined surface and the second inclined surface first contact each other; the limiting blocks 23163 continue to move upward, and the limiting blocks 23163 are pressed to compress the springs, so that the limiting blocks 23163 move to the inside of the second ejection plate 2313 and disengage from the buckles 23161, and the first ejection plate 2312 and the second ejection plate 2313 are separated.

[0048] The return spring 23151 is sleeved on each ejection rod 2315 and located between the support plate 2314 and the second ejection plate 2313, so that when the external force acting on the second ejection plate 2313 is removed, the second ejection plate 2313 can be reset in time under the action of the return spring 23151. The first upper fixing assembly 232 further includes a plurality of sliding blocks 2325 arranged between the female mold plate 2323 and the male mold plate 2318 and surrounding the core pulling insert 2319, and sliding block guide blocks 2326 arranged between the female mold plate 2323 and the male mold plate 2318 and corresponding to the outside of the plurality of sliding blocks 2325; the second upper fixing assembly 232' also includes a plurality of sliding blocks 2325' arranged between the female mold plate 2323' and the male mold plate 2318 and surrounding the core pulling insert 2319, and sliding block guide blocks 2326' arranged between the female mold plate 2323' and the male mold plate 2318 and corresponding to the outside of the plurality of sliding blocks 2325', so as to ensure the forming precision of the peripheral wall 2'. The lower fixing assembly 231 further includes a reset rod 23131 installed on the second ejection plate 2313 and extending upward to penetrate the male mold plate 2318, and the top surface of the reset rod 23131 is in contact with the female mold plate 2323 or the female mold plate 2323' in the clamped state.

[0049] The forming process of the above carrying tray and the working principle of the forming mold 23 are as follows: the bottom plate 1' obtained after machining is buried in the female mold core 2324 (i.e. the female mold core 2324 of the first upper fixing assembly 232), the first upper fixing assembly 232 and one lower fixing assembly 231 are clamped (as shown in FIG. 6), and the core pulling insert 2319 is pulled out to form the bottom plate 1' and the peripheral wall 2' of the carrying tray. Figure 5As shown, fiber-reinforced polycarbonate is injected through an injection mechanism 31 via an injection head 23221 and an injection channel to form a peripheral wall 2'; after molding, the lower fixing component 231 and the first upper fixing component 232 are opened, and the ejection mechanism (which can be driven by the aforementioned drive unit 24 or can be driven independently by an existing conventional hydraulic drive mechanism) does not perform an ejection action.

[0050] The male mold base 21 rotates 180°, and the lower fixing component 231 then closes with the second upper fixing component 232' (at this time, the other lower fixing component 231 and the first upper fixing component 232 can also be closed). Figure 6 As shown. TPU is injected via the two-shot injection mechanism 32 through the injection head 23221' and the two-shot flow channel to form buffer elements 3' at the four corners of the peripheral wall 2'; after molding, the lower fixing component 231 and the second upper fixing component 232' are opened, and the ejector pin 30 (which can be driven by the aforementioned drive unit 24, or can be driven independently by a conventional hydraulic drive mechanism) drives the second ejector plate 2313 to move upward (in this embodiment, the upward movement distance is a, a = 10mm, such as...). Figure 8 As shown by the arrow, under the action of the opening and closing structure 2316, the first ejector plate 2312 moves upward synchronously by a distance a, and the ejector rod 2315 also moves upward by a distance a (the return spring 23151 is compressed), thereby causing the male template 2318 to move synchronously by a distance a (at this time, the distance between the support plate 2314 and the male template 2318 is a, and the core puller 2319 actually moves downward by a distance a relative to the male template 2318, so that the core puller 2319 separates from the molded product and avoids mold pulling); the ejector rod 30 continues to move upward, the guide block 23162 squeezes the limiting block 23163 to move it inward, the second ejector plate 2313 separates from the first ejector plate 2312 (the first ejector plate 2312 is limited by the guide block 23162 and no longer moves upward), the second ejector plate 2313 continues to move upward by a distance b (b = 35mm), and the return spring 23151 is further compressed (as shown by the arrow). Figure 9 As shown), at this time, the reset rod 23131 moves upward a distance b in sync and can push out the product (mainly the powder formed around the bearing tray; the position of the reset rod 23131 can also be adjusted as needed to directly push out the product body), and the product can be taken away manually or by a robot (the push rod 30 retracts, and other structures are reset under the action of the return spring).

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for integrally forming a multi-material carrying tray, the carrying tray comprising a bottom plate (1'), a peripheral wall (2') formed at the edge of the bottom plate (1') and perpendicular thereto, and a buffer (3') formed at the four corners of the peripheral wall (2') and extending onto the bottom plate (1'), the bottom plate (1') being a carbon fiber plate, the peripheral wall (2') being a fiber-reinforced polycarbonate, and the buffer (3') being TPU material, comprising the following steps: characterized in that (a) machining a carbon fiber plate to the desired size and shape to obtain the bottom plate (1'); (b) heating and softening the bottom plate (1') and embedding it into a preheated forming mold; the preheating temperature of the forming mold is 130-180°C; (c) using an injection head of an injection molding machine to inject fiber-reinforced polycarbonate into the forming mold to adhere to the edge of the bottom plate (1'), and cooling to form the peripheral wall (2'); (d) using another injection head of the injection molding machine to inject TPU into the forming mold, and cooling to form; the forming mold comprises: at least one lower fixing assembly (231), the lower fixing assembly (231) comprising a lower fixing plate (2311), a second ejection plate (2313) movable relative to the lower fixing plate (2311), a first ejection plate (2312) movably arranged between the lower fixing plate (2311) and the second ejection plate (2313), a bearing plate (2314) arranged in spaced apart relationship with the first ejection plate (2312), a plurality of support columns (2310) connected between the bearing plate (2314) and the lower fixing plate (2311) and penetrating the first ejection plate (2312) and the second ejection plate (2313), a plurality of ejection rods (2315) penetrating the bearing plate (2314) and extending to the first ejection plate (2312), a male mold plate (2318) arranged on the bearing plate (2314), a male mold core (2317) embedded in the male mold plate (2318), and a core pulling pin (2319) mounted on the bearing plate (2314) and penetrating the male mold plate (2318) and the male mold core (2317); a first upper fixing assembly (232) and a second upper fixing assembly (232'), the first upper fixing assembly (232) and the second upper fixing assembly (232') being respectively mounted on two lower fixing assemblies (231) and independently comprising an upper fixing plate (2321, 2321'), a hot runner plate (2322, 2322') mounted on the surface of the upper fixing plate (2321, 2321') and facing the lower fixing assembly (231), a female mold plate (2323, 2323') mounted on the surface of the hot runner plate (2322, 2322'), and a female mold core (2324, 2324') embedded in the female mold plate (2323, 2323') and cooperating with the male mold core (2317). ​ 2. The method of integrally forming a multi-material carrier tray of claim 1, wherein: In step (a), positioning holes are processed at the four corners of the bottom plate (1'); the carbon fiber plate is also milled and the rolled edge is removed.

3. The method of integrally forming a multi-material carrier tray of claim 2, wherein: In step (b), the bottom plate (1') is placed on a positioning jig, and a mechanical hand is used to transfer it to an IR furnace positioning tray; the position of the positioning tray is adjusted so that the distance between the upper part and the lower part and the upper heating plate and the lower heating plate is independently 3-5 cm; after softening, it is taken out from the IR furnace positioning tray by a mechanical hand; the distance between the upper heating plate and the lower heating plate is 8-12 cm.

4. The method of integrally forming a multi-material carrier tray of claim 3, wherein: In step (b), the temperature in the furnace of the IR furnace is 290-320°C, and the heating time is 30-40 s, and the out-of-furnace temperature of the bottom plate (1') is 220-280°C; in step (c), the temperature after cooling is 50-80°C.

5. The method of integrally forming a multi-material carrier tray of claim 1, wherein, The forming mold further comprises: The male die core (2317) and the female die core (2324, 2324') form one jet channel and two jet channels, respectively, and the hot runner plate (2322, 2322') has a plurality of injection heads (23221, 23221') corresponding to the one jet channel and the two jet channels.

6. The method of integrally forming a multi-material carrier tray of claim 5, wherein: The first ejection plate (2312) and the second ejection plate (2313) are movably connected by an opening and closing structure (2316), the opening and closing structure (2316) includes a buckle (23161) clamped on the side of the first ejection plate (2312) and the second ejection plate (2313), a guide block (23162) fixed on one end of the side of the supporting plate (2314) and extending to the other end, and a limiting block (23163) mounted on the side of the second ejection plate (2313) by a spring and matched with the buckle (23161) and the guide block (23162).

7. The method of integrally forming a multi-material carrier tray of claim 6, wherein: The end of the limiting block (23163) is provided with a first inclined surface, and the end of the guide block (23162) is provided with a second inclined surface matched with the first inclined surface.

8. The method of integrally forming a multi-material carrier tray of claim 5 or 6, wherein: A return spring (23151) is sleeved on each of the ejection rods (2315), and the return spring (23151) is located between the supporting plate (2314) and the second ejection plate (2313).

9. The method of integrally forming a multi-material carrier tray of claim 5, wherein: The first upper fixing assembly (232) and the second upper fixing assembly (232') further independently comprise a plurality of sliding blocks (2325, 2325') arranged between the female die plate (2323, 2323') and the male die plate (2318) and surrounding the core pulling insert (2319), and a sliding block guide block (2326, 2326') arranged between the female die plate (2323, 2323') and the male die plate (2318) and corresponding to the outside of the plurality of sliding blocks (2325, 2325').

10. The method of integrally forming a multi-material carrier tray of claim 5, wherein: The lower fixing assembly (231) further comprises an ejection plate guide column (23111) installed on the lower fixing plate (2311) and extending to be connected with the bearing plate (2314), and a reset rod (23131) installed on the second ejection plate (2313) and extending to penetrate through the male mold plate (2318).

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