Composite support plate forming process, forming die and composite board sole processing process

Abstract

This application relates to a forming process for a composite support plate, a forming mold, and a processing process for a composite plate sole. The forming process for the composite support plate includes the following steps: placing the support plate into the forming mold. The support plate is made of a metal material with a density less than 5 g / cm³, has a hollow mesh hole, and the hollow ratio of the support plate is 50% - 90%. There is a forming gap between the support plate and the inner part of the mold cavity of the forming mold; injecting TPU material into the mold cavity, and the TPU material wraps the support plate to form a TPU film, obtaining a composite support plate. The composite support plate prepared by this application can replace the use of carbon plates in the sole and greatly reduce costs.

Description

Technical Field

[0001] This application relates to the field of footwear components, and particularly to a composite support plate forming process, a forming mold, and a composite plate sole processing process. Background Art

[0002] Currently, most high-end running shoes on the market embed carbon fiber plates (also known as carbon plates) inside the soles. The design of carbon plate shoes helps provide better rebound and acceleration capabilities, making runners more labor-saving during running, thereby improving running efficiency.

[0003] However, when carbon plates are processed and manufactured, a series of processes such as fiber pretreatment, impregnation molding, curing, post-forming processing, mold making, cutting prepreg, high-temperature curing molding, and polishing treatment are required. The processing process is relatively complex and time-consuming, so the manufacturing cost of carbon plates is relatively high. Summary of the Invention

[0004] Based on this, this application provides a composite support plate forming process, a forming mold, and a composite plate sole processing process, which use a low-cost lightweight composite support plate to replace the role of carbon plates in the soles, greatly reducing costs.

[0005] A composite support plate forming process provided by this application adopts the following technical solutions:

[0006] A composite support plate forming process includes the following steps: placing a support plate into a forming mold. The support plate is made of a metal material with a density less than 5 g / cm³, has a hollow mesh, and the hollow ratio of the support plate is 50% - 90%. There is a forming gap between the support plate and the inner part of the mold cavity of the forming mold; injecting TPU material into the mold cavity, and the TPU material wraps the support plate to form a TPU film, obtaining a composite support plate.

[0007] By adopting the above technical solutions, by using a lightweight metal material with a density less than 5 g / cm³ to make the support plate, the support plate with a hollow mesh also has high strength, stiffness, and lightweight effect. After replacing the carbon plate and installing it inside the sole, it can provide support, rebound, and acceleration capabilities, making runners more labor-saving during running.

[0008] Secondly, since the lightweight metal material can be processed and formed at one time by casting, extrusion, or 3D printing, the processing process is simpler, the production cost is lower, which is conducive to reducing the overall price of the shoes and alleviating the burden on consumers.

[0009] Moreover, a composite support plate is produced by integrally molding a TPU film on the surface of the support plate. The TPU film can not only serve as a protective film to reduce the rusting of the support plate, facilitate transportation and individual sales, but also act as an intermediate connecting medium between the support plate and the sole material, thus greatly enhancing the bonding strength between the composite support plate and the sole material and reducing delamination. Additionally, the integrally injection-molded method has low processing difficulty and high efficiency, significantly reducing the manufacturing cost.

[0010] In summary, through the use of lightweight metal materials with hollow mesh holes and the injection and wrapping of TPU material on the support plate, that is, the TPU film is integrally injection-molded and wrapped around the lightweight support plate to produce a composite support plate. It is lightweight, high-strength, and high-rigidity. After being installed inside the sole in place of the carbon plate, it can provide support, rebound, and acceleration capabilities, making runners more labor-saving during running. Moreover, the forming processes of the support plate and the composite support plate are simple and low-cost, which is beneficial to reducing the overall price of the shoes and alleviating the burden on consumers.

[0011] Optionally, the support plate is integrally formed by 3D printing technology.

[0012] Optionally, before injecting the TPU material, at least one of the hollow mesh holes of the support plate is blocked by a blocking member, and the TPU material does not cover the blocked hollow mesh holes, so that the TPU film has a hollow structure.

[0013] By adopting the above technical solution, the TPU film has a hollow structure to improve the glue penetration rate during cold-gluing the sole, thereby increasing the bonding area and reducing delamination.

[0014] Optionally, the support plate sequentially includes a forefoot part, an arch part, and a heel part, and the front end of the forefoot part is bent upward; the positioning and holding state of the support plate in the mold cavity is set as a prestressed state. In the prestressed state, the front end of the forefoot part elastically bends upward by 0 to 5° compared to its middle part; the TPU material is injected into the mold cavity, and the TPU material wraps the support plate; after the TPU film is formed, the prestressed state is released, and the composite support plate recovers its deformation.

[0015] By adopting the above technical solution, when the forming die is closed, the support plate is positioned and clamped. When positioning and clamping the support plate, the clamping force will force the front end of the support plate to elastically bend upward by 0-5°, so that the support plate is in a prestressed state. Under this prestressed state, the TPU material is injected and wrapped, and the TPU film is formed. In the forming die in the closed state, the TPU film has no tension and no compression. After the forming die is opened, without the clamping force, the composite support plate recovers its elastic deformation and releases the prestressed state. At this time, the TPU film on the upper surface of the composite support plate is slightly stretched, while the TPU film on the lower surface of the composite support plate is slightly compressed, that is, the TPU film is in a prestressed state. When the sole combined with this composite support plate is in use, such as during jumping or running, the bending amplitude of the front sole position is relatively large, which will cause the TPU film on the upper surface of the composite support plate to change from slightly stretched to compressed, and the TPU film on the lower surface of the composite support plate to change from slightly compressed to stretched. Compared with the composite support plate in the non-prestressed state, although the deformation amount of the TPU film is the same, because the TPU film on the upper surface of the composite support plate changes from slightly stretched to compressed, and the TPU film on the lower surface of the composite support plate changes from slightly compressed to stretched, the degree of compression or tensile deformation of the TPU film of this composite support plate is smaller than that of the TPU film of the composite support plate in the non-prestressed state, thereby reducing the occurrence of the situation that the TPU film is prone to fatigue failure or deformation and tearing damage due to excessive compression or tensile deformation of the TPU film.

[0016] Secondly, as an intermediate connection medium between the support plate and the sole material, the TPU film can reduce the occurrence of the situation of delamination from the sole material due to excessive deformation and tearing of the TPU film when the degree of compression or tensile deformation of the TPU film is small, thereby improving the service life of the sole.

[0017] Optionally, the support plate has a plurality of cross-set ribs, and the included angle between adjacent crossed ribs is 10°-45°. Each rib encloses to form the hollow mesh hole; after the TPU film is formed, the prestressed state is released, and the composite support plate recovers its deformation; the composite support plate is taken out, and a cut is made on the surface of the TPU film. The cutting seam corresponds to the rib, and the depth of the cutting seam is two-thirds of the thickness of the TPU film.

[0018] By adopting the above technical solution, slitting along the length direction of the rib when the TPU film of the composite support plate is in a prestressed state can eliminate part of the prestress of the TPU film on the upper surface of the composite support plate, greatly increasing the compressibility of the TPU film at this part. At the same time, it also increases the degree of micro-compression of the TPU film on the lower surface of the composite support plate, so as to greatly improve the stretchability of the TPU film at this part. As a result, the degree of compression or tensile deformation of the TPU film of this composite support plate is smaller than that of the TPU film of the composite support plate in the non-prestressed state, thereby reducing the occurrence of situations where the TPU film is prone to fatigue failure or deformation and tearing damage due to excessive compression or tensile deformation of the TPU film.

[0019] Secondly, by setting the cutting seam, during the cold-gluing sole process, the glue easily penetrates into the cutting seam, thereby increasing the bonding area and bonding strength between the composite support plate and the sole material, and further reducing delamination.

[0020] Moreover, since the cutting seam has a certain depth, after the glue penetrates into the cutting seam and solidifies, the parts of the TPU film on the opposite inner walls of the cutting seam are bonded and cured. The bonded and cured parts of the TPU film will form a three-dimensional soft skeleton, which can increase the structural strength of the TPU film, making the deformation degree of the TPU film smaller, so as to reduce the occurrence of situations where the TPU film is prone to fatigue failure or deformation and tearing damage due to excessive compression or tensile deformation of the TPU film.

[0021] A molding die provided by the present application adopts the following technical solution:

[0022] A molding die, which is applied to the composite support plate molding process, includes an upper die and a lower die. The opposite surfaces of the upper die and the lower die cooperate to form the mold cavity. The opposite surfaces of the upper die and the lower die are both provided with a plurality of positioning rods for abutting against the surface of the support plate.

[0023] Optionally, the positioning rods abutting against the front end and the middle part of the forefoot of the support plate are set as prestressed positioning rods, and the vertical position of the prestressed positioning rods is adjustable.

[0024] By adopting the above technical solution, the abutment of the prestressed positioning rods can force the forefoot of the support plate to undergo elastic deformation, that is, the adjustable position of the prestressed positioning rods can control the elastic bending deformation angle of the support plate in the prestressed state, so as to adjust the elastic amount of the TPU film of the support plate for different uses or sizes, and improve the applicability of the composite support plate.

[0025] A composite plate sole processing technology provided by the present application adopts the following technical solution:

[0026] A composite board sole processing technology comprises the following steps: fixing a composite support plate obtained by a composite support plate forming process in the sole by means of brushing glue, wherein the composite support plate is located between the midsole and the outsole or on the midsole, so as to obtain the composite board sole.

[0027] A composite board sole processing technology comprises the following steps: placing a composite support board obtained by a composite support board forming technology into an injection mold, injecting a sole material liquid into the injection mold, and contacting and connecting the sole material liquid with the composite support board to form a composite board sole.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. A composite support plate made of a lightweight metal material with a hollow mesh and a support plate TPU material is injected and wrapped, that is, the TPU film is integrally injection molded and wrapped around the lightweight support plate to obtain a composite support plate, which has lightweight, high strength and high rigidity. It can provide support, rebound and acceleration capabilities after being installed inside the sole instead of the carbon plate, making the runner more labor-saving during running; and the molding process of the support plate and the composite support plate is simple and low-cost, which is conducive to reducing the overall price of the shoes and alleviating the burden on consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the support plate of Example 1.

[0031] Figure 2 It is a side view of the support plate of Example 1.

[0032] Figure 3 It is a schematic diagram of the molding die of Example 1.

[0033] Figure 4 This is a cross-sectional view of the molding die of Example 1 in the mold clamping state.

[0034] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle.

[0035] Figure 6 It is a partial cross-sectional view of the composite support plate of Example 1.

[0036] Figure 7 This is a partial cross-sectional view of the molding die of Example 2 in the mold clamping state.

[0037] Figure 8 It is a partial cross-sectional view of the composite support plate of Example 2.

[0038] Figure 9 This is a diagram of the three state changes of the support plate in Example 3.

[0039] Figure 10 It is a partial cross-sectional view of the mold clamping state of the molding die in Embodiment 4.

[0040] Figure 11 It is a partial cross-sectional view of the composite support plate in Embodiment 5.

[0041] Figure 12 It is an exploded view of the composite plate sole in Embodiment 6.

[0042] Explanation of reference numerals: 1, support plate; 3, TPU film; 10, composite support plate; 11, forefoot part; 12, arch part; 13, heel part; 15, hollow mesh holes; 16, ribs; 20, mold cavity; 21, upper mold; 22, lower mold; 221, threaded hole; 23, positioning rod; 230, prestressed positioning rod; 231, bolt; 25, plugging member; 31, cutting seam; 51, midsole; 52, outsole. Detailed Description of the Embodiments

[0043] The following further elaborates on this application Figures 1-12 in conjunction with the attached drawings.

[0044] Embodiment 1

[0045] Embodiment 1 discloses a composite support plate molding process, including the following steps: As Figures 1-3 shown, place the support plate 1 into the molding die. The support plate 1 is made of a metal material with a density less than 5 g / cm³, which can be titanium alloy. The support plate 1 can be formed in one piece by casting, extrusion, or 3D printing. In this embodiment, the support plate 1 is integrally formed by 3D printing process.

[0046] In this embodiment, the support plate 1 sequentially includes a forefoot part 11, an arch part 12, and a heel part 13. The front end of the forefoot part 11 is bent upward. In other embodiments, the support plate 1 can only have a forefoot part 11 and an arch part 12.

[0047] The support plate 1 has hollow mesh holes 15. The hollow ratio of the support plate 1 is 50% - 90%. The hollow mesh holes 15 can be round holes, square holes, or diamond-shaped holes. In this embodiment, the support plate 1 has multiple intersecting ribs 16, and the included angle between adjacent intersecting ribs 16 is 10° - 45°. Each rib 16 encloses to form the hollow mesh holes 15.

[0048] After the support plate 1 is placed into the molding die, as Figures 4-5 shown in the figure, close the mold. At this time, there is a molding gap between the support plate 1 and the inside of the mold cavity 20 of the molding die.

[0049] The TPU material is injected into the mold cavity 20, the TPU material fills the molding gap and the hollow mesh 15, and the TPU material wraps the support plate 1. After the TPU material solidifies, a TPU film 3 is formed. Figure 6 As shown, the mold is opened to obtain the composite support plate 10.

[0050] At the same time, Example 1 also discloses a molding die, which is applied to the composite support plate molding process, specifically, as follows Figures 3-5 As shown, the molding mold includes an upper mold 21 and a lower mold 22, and the relative surfaces of the upper mold 21 and the lower mold 22 cooperate to form a mold cavity 20. A plurality of positioning rods 23 are fixed to the relative surfaces of the upper mold 21 and the lower mold 22. The upper positioning rods 23 abut against the upper surface of the support plate 1, and the lower positioning rods 23 abut against the lower surface of the support plate 1. Through the abutment, the support plate 1 is suspended in the mold cavity 20 to facilitate the molding of the TPU film 3 wrapped around the support plate 1. It can be understood that the virtual curved surface composed of the abutting end points of each positioning rod 23 in this embodiment is adapted to the surface curved surface of the support plate 1.

[0051] Furthermore, the positioning rods 23 may be evenly distributed, or arranged at several points, such as being arranged at one or more key points in the forefoot portion 11 , the arch portion 12 , or the heel portion 13 of the support plate 1 .

[0052] The implementation principle of Example 1 is: by using a lightweight metal material with a density of less than 5g / cm³ to make the support plate 1, the support plate 1 with a hollow mesh 15 also has high strength, rigidity and lightweight effect. After being installed inside the sole instead of the carbon plate, it can provide support, rebound and acceleration capabilities, making the runner more energy-saving during running.

[0053] Secondly, since the lightweight metal support plate 1 can be formed in one step by casting, extrusion or 3D printing, the processing is simpler and the production cost is lower, which is conducive to reducing the overall price of the shoes and alleviating the burden on consumers.

[0054] Furthermore, by integrally forming the TPU film 3 on the surface of the support plate 1 to obtain the composite support plate 10, the TPU film 3 can not only serve as a protective film to reduce the rust of the support plate 1, and facilitate transportation and separate sales, but also serve as an intermediate connecting medium between the support plate 1 and the sole material to greatly improve the bonding strength between the composite support plate 10 and the sole material, thereby reducing debonding. Furthermore, the one-piece injection molding method is adopted, which has low processing difficulty and high efficiency, and greatly reduces the manufacturing cost.

[0055] Example 2

[0056] The difference between the composite support plate forming process and the forming mold of Example 2 and Example 1 is that Figures 7-8As shown, a plugging member 25 is fixed to the upper mold 21 and / or the lower mold 22. The plugging member 25 can be a block structure, and its shape is adapted to the hollow mesh holes 15. During the mold closing process, the plugging member 25 plugs into the hollow mesh holes 15 of the support plate 1. The plugging member 25 can assist in positioning the support plate 1 in the mold cavity 20. The number of the plugging members 25 can be one, or the plugging members 25 can be multiple, and the number of the plugging members 25 can be the same as the number of the hollow mesh holes 15.

[0057] Then, TPU material is injected. Since the plugging member 25 plugs into the hollow mesh holes 15 of the support plate 1, the TPU material fails to flow into these hollow mesh holes 15, and the TPU material can only wrap the surface of the support plate 1 and fill in the unblocked hollow mesh holes 15.

[0058] After the TPU material solidifies, the mold is opened to obtain the composite support plate 10. At this time, the TPU film 3 of the composite support plate 10 has a hollow structure.

[0059] Since the TPU film 3 has a hollow structure, it will improve the penetration rate of the glue brushing during the cold bonding of the shoe sole, thereby increasing the bonding area and reducing the degumming.

[0060] Embodiment 3

[0061] The difference between the composite support plate forming process of Embodiment 3 and that of Embodiment 1 is that, as Figure 9 shown, Figure 9 in the first state diagram, it is the state before the support plate 1 is placed in the forming mold. After the support plate 1 is placed in the forming mold, the support plate 1 is positioned in the mold cavity 20. The positioning holding state of the support plate 1 in the mold cavity 20 is set as the prestressed state. In the prestressed state, the front end of the forefoot part 11 is elastically bent upward by 0 - 5° compared with its own middle part (see Figure 9 the second state diagram).

[0062] The realization of this prestressed state is that the virtual surface formed by the abutting end points of the positioning rods 23 in this embodiment is the surface of the forefoot part 11 of the support plate 1 in the elastically bent state. Therefore, during the mold closing process, the mold closing pressure abuts against the surface of the support plate 1 through the positioning rods 23 to force the front end of the forefoot part 11 to be elastically bent upward by 0 - 5° compared with its own middle part.

[0063] The realization of this prestressed state can also be that the positions of the positioning rods 23 are adjustable with respect to the upper mold 21 and the lower mold 22 respectively. After the mold is closed, the support plate 1 is in the positioning state, and then the height positions of the positioning rods 23 corresponding to the forefoot part 11 are adjusted to force the front end of the forefoot part 11 to be elastically bent upward by 0 - 5° compared with its own middle part, that is, the support plate 1 is changed to the prestressed state after the mold is closed.

[0064] After the support plate 1 is in the prestressed state, the prestressed state is maintained, and the TPU material is injected into the mold cavity 20, and the TPU material wraps the support plate 1; after the TPU film 3 is formed, the prestressed state is released, and the composite support plate 10 recovers its deformation (see Figure 9 (see Figure 3).

[0065] The implementation principle of Example 3 is: when the support plate 1 is in a prestressed state, the TPU material is injected and wrapped while maintaining the prestressed state, and the TPU film 3 is formed. In the molding mold in the mold closing state, the TPU film 3 is not stretched or compressed. After the molding mold is opened, the upper mold 21 and the lower mold 22 have no clamping force on the composite support plate 10, and the composite support plate 10 restores its elastic deformation to release the prestressed state. At this time, the TPU film 3 located on the upper surface of the composite support plate 10 is slightly stretched, and the TPU film 3 located on the lower surface of the composite support plate 10 is slightly compressed, that is, the TPU film 3 is in a prestressed state.

[0066] During the use of the sole of the composite support plate 10, such as jumping or running, the forefoot of the sole is bent to a large extent, which will cause the TPU film 3 located on the upper surface of the composite support plate 10 to change from micro-stretching to compression, and the TPU film 3 located on the lower surface of the composite support plate 10 to change from micro-compression to tension. Compared with the composite support plate 10 in a non-prestressed state, although the deformation amount of the TPU film 3 is the same, because the TPU film 3 located on the upper surface of the composite support plate 10 changes from micro-stretching to compression, and the TPU film 3 located on the lower surface of the composite support plate 10 changes from micro-compression to tension, the compression or tension deformation degree of the TPU film 3 of the composite support plate 10 is smaller than that of the TPU film 3 of the composite support plate 10 in a non-prestressed state, thereby reducing the compression or tension deformation degree of the TPU film 3 being too large, which may cause the TPU film 3 to be prone to fatigue failure or deformation tearing damage.

[0067] Secondly, the TPU film 3 serves as the intermediate connecting medium between the support plate 1 and the sole material. When the compression or tension deformation of the TPU film 3 is small, it can reduce the debonding of the TPU film 3 from the sole material due to excessive deformation and tearing, thereby improving the service life of the sole.

[0068] Example 4

[0069] The difference between the molding die of Example 4 and Example 3 is that Figure 10 As shown, the positioning rod 23 abutting against the front end and middle part of the forefoot portion 11 of the support plate 1 is set as a prestressed positioning rod 230, and the vertical position of the prestressed positioning rod 230 is adjustable. Specifically, the upper mold 21 and the lower mold 22 are both provided with vertically arranged threaded holes 221, and the ends of the prestressed positioning rod 230 are fixed with bolts 231, and the bolts 231 are threadedly matched with the threaded holes 221.

[0070] It should be noted that the positions of other positioning rods 23 may be non-adjustable.

[0071] Before mold clamping, by rotating the bolt 231, the height of the prestressed positioning rod 230 is increased, and the abutment of the prestressed positioning rod 230 can force the front sole part 11 of the support plate 1 to undergo elastic deformation. That is, the adjustable position of the prestressed positioning rod 230 can realize the control of the elastic bending deformation angle of the support plate 1 in the prestressed state, so as to realize the adjustment of the elastic amount of the TPU film 3 of the support plate 1 with different uses or sizes, and improve the applicability of the composite support plate 10.

[0072] Example 5

[0073] The difference between the composite support plate forming process of Example 5 and that of Example 3 is that, as Figure 11 shown, after the TPU film 3 is formed, the prestressed state is released, and the composite support plate 10 resumes deformation; the composite support plate 10 is taken out, and slits are made on the surface of the TPU film 3. The length direction of the cutting slit 31 corresponds to the length direction of the rib 16, and the depth of the cutting slit 31 is two-thirds of the thickness of the TPU film 3.

[0074] The slits can be made on the surface of the TPU film 3 with a utility knife, or can be automatically slit by a robotic arm, or can be slit at one time by a cutting die.

[0075] The implementation principle of Example 5 is that when slitting along the length direction of the rib 16 while the TPU film 3 of the composite support plate 10 is in the prestressed state, a part of the prestress of the TPU film 3 on the upper surface of the composite support plate 10 can be eliminated, which will greatly increase the compressibility of the TPU film 3 in this part. At the same time, the micro-compression degree of the TPU film 3 on the lower surface of the composite support plate 10 is also increased, so as to greatly improve the stretchability of the TPU film 3 in this part. As a result, the compression or tensile deformation degree of the TPU film 3 of the composite support plate 10 is smaller than that of the TPU film 3 of the composite support plate 10 in the non-prestressed state, thus reducing the occurrence of the situation that the TPU film 3 is prone to fatigue failure or deformation and tearing damage due to excessive compression or tensile deformation degree of the TPU film 3.

[0076] Secondly, by setting the cutting slit 31, during the cold-glue sole process, the glue is easily infiltrated into the cutting slit 31, thereby increasing the bonding area and bonding strength between the composite support plate 10 and the sole material, and further reducing delamination.

[0077] Moreover, since the cutting seam 31 has a certain depth, after the glue penetrates into the cutting seam 31 and solidifies, the parts of the TPU film 3 located on the opposite inner walls of the cutting seam 31 are bonded and cured. The bonded and cured parts of the TPU film 3 will form a three-dimensional soft skeleton, which can increase the structural strength of the TPU film 3, making the deformation degree of the TPU film 3 smaller, so as to reduce the situation that the TPU film 3 is prone to fatigue failure or deformation and tearing damage due to excessive compression or tensile deformation.

[0078] Example 6

[0079] Example 6 discloses a processing technology for composite board soles, including the following steps: As Figure 12 shown, by using the method of brush gluing, the composite support plate 10 prepared in the above example is fixed in the sole, and the composite support plate 10 is located between the midsole 51 and the outsole 52 or on the midsole 51 to prepare a composite board sole.

[0080] Example 7

[0081] Example 7 discloses a processing technology for composite board soles, including the following steps: Put the composite support plate 10 prepared in the above example into an injection mold, and inject sole material liquid into the injection mold. The sole material liquid contacts and connects with the composite support plate 10 to form a composite board sole.

[0082] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A composite support plate forming process, characterized in that: The following steps are involved: A support plate (1) is placed in a molding die, wherein the support plate (1) is made of a metal material with a density of less than 5 g / cm³, the support plate (1) has a hollow mesh (15), the hollow ratio of the support plate (1) is 50% to 90%, and a molding gap is provided between the support plate (1) and the interior of the mold cavity (20) of the molding die; a TPU material is injected into the mold cavity (20), the TPU material wraps the support plate (1) to form a TPU film (3), and a composite support plate (10) is obtained; the support plate (1) comprises a forefoot portion (11), an arch portion (12), and a heel portion (13) in sequence, and the front end of the forefoot portion (11) is bent upward; the positioning and holding state of the support plate (1) in the mold cavity (20) is set to a prestressed state, and in the prestressed state, the front end of the forefoot portion (11) is elastically bent upward by 0 to 5 degrees compared to its own middle portion; after the TPU film (3) is formed, the prestressed state is released, and the composite support plate (10) recovers its deformation.

2. The composite support plate forming process according to claim 1, characterized in that: The support plate (1) is integrally formed by a 3D printing process.

3. The composite support plate forming process according to claim 1, characterized in that: Before the TPU material is injected, at least one of the hollow mesh holes (15) of the support plate (1) is blocked by a blocking member (25), and the TPU material does not cover the blocked hollow mesh hole (15), so that the TPU film (3) has a hollow structure.

4. The composite support plate forming process according to claim 1, characterized in that: The support plate (1) has a plurality of cross-arranged ribs (16), the angle between adjacent cross-arranged ribs (16) is 10° to 45°, and the ribs (16) are combined to form the hollow mesh (15); after the TPU film (3) is formed, the prestressed state is released, and the composite support plate (10) recovers its deformation; the composite support plate (10) is taken out, and a slit is made on the surface of the TPU film (3), the slit (31) corresponds to the rib (16), and the depth of the slit (31) is two-thirds of the thickness of the TPU film (3).

5. A forming mold, which is applied to the composite support plate forming process according to any one of claims 1 to 4, characterized in that: The mold cavity (20) is formed by cooperating with the opposing surfaces of the upper mold (21) and the lower mold (22). The opposing surfaces of the upper mold (21) and the lower mold (22) are provided with a plurality of positioning rods (23) for abutting against the surface of the support plate (1). The positioning rods (23) abutting against the front end and middle part of the forefoot portion (11) of the support plate (1) are set as prestressed positioning rods (230).

6. The molding die according to claim 5, characterized in that: The vertical position of the prestressed positioning rod (230) is adjustable.

7. A composite board sole processing technology, characterized by: The method comprises the following steps: fixing the composite support plate (10) obtained by the composite support plate forming process according to any one of claims 1 to 4 in the sole by means of adhesive brushing, wherein the composite support plate (10) is located between the midsole (51) and the outsole (52) or on the midsole (51), so as to obtain a composite plate sole.

8. A composite board sole processing technology, characterized by: The following steps are involved: The composite support plate (10) obtained by the composite support plate forming process according to any one of claims 1 to 4 is placed in an injection mold, and a shoe sole liquid is injected into the injection mold so that the shoe sole liquid contacts and connects with the composite support plate (10) to form a composite plate sole.

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