Process for manufacturing a sole with a pattern layer

Abstract

The present application relates to a kind of sole preparation process with pattern layer, it mainly solves the preparation efficiency of the sole with group layer in prior art, and the problem of poor aesthetic quality, including the following steps: 1) the film with surface attached ink pattern is cut to form single pattern unit;2) the pattern unit is placed in the cavity of injection mold, the lower surface, upper surface of cavity is provided with corresponding concave-convex anti-skid pattern;3) the pattern unit is attached to the upper surface and / or side surface of cavity by injecting transparent injection material into cavity, the ink pattern on film is melted by fluid-like transparent injection material injected, and is fused into the surface layer of transparent injection material;4) after cooling and forming, mold is opened, the film on pattern unit is removed, and forms the big sole blank;5) the big sole blank is placed in the bottom of the cavity of sole forming mold, and after mold is closed, secondary injection injection material is injected to be compounded with big sole blank, and after cooling and forming, the sole with pattern layer is formed.

Description

Technical Field

[0001] This invention relates to a process for manufacturing shoe soles with patterned layers. Background Technology

[0002] Shoes are an essential tool in daily life. As the quality of life continues to improve, people's requirements for shoes are also getting higher and higher, requiring them to be both practical and aesthetically pleasing. Nowadays, printed soles with patterns or different colors on the market are generally printed on the outer or inner surface of the sole using a spray painting method, or the pattern is printed on transparent tape and then glued to the sole. However, when the pattern is printed on the outer surface of the sole, the friction generated during walking can easily wear down the pattern, affecting the appearance of the sole.

[0003] On October 14, 2022, the applicant filed a patent application entitled "A Shoe Sole with a Patterned Layer," with patent application number 202222715771.1. The patent application discloses a shoe sole with a patterned layer, comprising a transparent outsole, a patterned layer, and an insole. The transparent outsole is disposed below the insole, and the patterned layer is disposed between the transparent outsole and the insole. The patterned layer has a patterned surface printed with a design. The transparent outsole covers the patterned surface, allowing the design to be seen through the transparent outsole. The edge of the transparent outsole extends upward to form a edging. When the transparent outsole is disposed below the insole, the edging covers the outer periphery of the insole. The edge of the patterned layer extends upward to the space between the edging and the outer periphery of the insole. The design uses a transparent outsole and insole to sandwich the pattern layer, allowing the pattern to be seen through the transparent outsole, thus enhancing the aesthetics of the sole. The edging formed on the transparent outsole covers the side of the insole, extending the pattern to the side of the sole. This allows the pattern to be viewed from multiple angles, making the sole pattern more three-dimensional, beautiful, and complete. The transparent outsole also protects the pattern, extending its preservation time.

[0004] The manufacturing process of the aforementioned patterned sole is as follows: First, the pattern is printed on the fabric, and then the fabric is placed in the mold cavity. Since the pattern needs to cover the entire sole surface and prevent the fabric from shifting, the size of the fabric needs to be larger than the size of the mold cavity. The fabric is then clamped and fixed around the perimeter of the fabric by the upper and lower molds. Then, the blank is placed in the shoe cavity or transparent injection molding material is injected into the mold cavity through an injection machine and bonded to the fabric. After injection molding, the perimeter of the fabric needs to be trimmed manually. This method not only results in low trimming neatness and poor aesthetics, but also slow speed and high production cost. In addition, the sole surface has crisscrossing grooves to improve the anti-slip effect of the sole. However, after the fabric is bonded to the sole material, it is in a flat state. When observing the pattern of the fabric through the sole surface, it appears distorted at the grooves, resulting in blurred observation and poor aesthetics. Furthermore, when the fabric is attached to the side of the sole, its edge can only be made flat, making it impossible to manufacture soles with a large height range on the side of the sole. Summary of the Invention

[0005] Therefore, in view of the above problems, the present invention provides a process for manufacturing a shoe sole with a patterned layer, which mainly solves the problems of low manufacturing efficiency and poor aesthetics of shoe soles with patterned layers in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A process for manufacturing a shoe sole with a patterned layer includes the following steps:

[0008] 1) Cut the film with ink pattern on its surface into individual pattern units;

[0009] 2) The pattern unit is placed in the cavity of the injection mold. The periphery of the pattern unit is clamped and fixed by the upper and lower molds of the injection mold. The ink pattern of the pattern unit faces downward. The lower and upper surfaces of the mold cavity are provided with corresponding concave and convex anti-slip patterns.

[0010] 3) Inject transparent injection molding material into the mold cavity. The transparent injection molding material is injected from bottom to top and fills the mold cavity. The pattern unit slides relative to the injection mold, so that the pattern unit is attached to the upper surface and / or side of the mold cavity. The injected fluid transparent injection molding material causes the ink pattern on the film to melt and integrate into the surface layer of the transparent injection molding material.

[0011] 4) After cooling and molding, open the mold, peel off the film on the pattern unit, and form the base blank.

[0012] Furthermore, the sole manufacturing process also includes: placing the outsole blank at the bottom of the mold cavity of the sole forming mold, and placing the midsole blank on the outsole blank, and forming the outsole blank and midsole through vulcanization foaming; or placing the outsole blank at the bottom of the mold cavity of the sole forming mold, and injecting a second injection molding material to combine with the outsole blank after mold closing, and forming a sole with a patterned layer after cooling and molding.

[0013] Furthermore, the transparent injection molding material comprises 43-52 parts of thermoplastic elastomer, 15-20 parts of ethylene-vinyl acetate copolymer, 1-3 parts of zinc oxide, 1-3 parts of stearic acid, and 0.5-1.5 parts of crosslinking agent.

[0014] Furthermore, the transparent injection molding material comprises 48 parts of thermoplastic elastomer, 16 parts of ethylene-vinyl acetate copolymer, 2 parts of zinc oxide, 3 parts of stearic acid, and 1.2 parts of crosslinking agent.

[0015] Furthermore, the crosslinking agent is dicumyl peroxide.

[0016] Furthermore, the thermoplastic elastomer includes TPR and TPU, wherein the ratio of TPR to TPU is 3:1.

[0017] Furthermore, the injection mold includes a frame, a rotating shaft mounted on the frame, an upper platen, a lower platen, a drive device, a transmission assembly, at least three lifting assemblies, at least three mold assemblies, and at least three injection molding machines. The rotating shaft is rotatably mounted on the frame via bearings and is distributed along the vertical direction. The drive device is connected to the rotating shaft via the transmission assembly to realize the rotation of the rotating shaft. The upper platen and lower platen are respectively fixed on the rotating shaft and distributed along the axial direction of the rotating shaft. At least three mold mounting stations are provided on the circumference of the rotating shaft and between the upper and lower platens. Each of the lifting assemblies and mold assemblies is located at the mold mounting station, and each of the mold assemblies is connected to the injection molding machine.

[0018] Furthermore, the mold assembly includes an upper mold fixed to the lower surface of the upper platen, a lower mold disposed on the upper end of the lifting assembly, an upper mold core, a lower mold core, an adjusting assembly, and a tensioning assembly. The lower surface of the upper mold has a recessed upper mold cavity in the middle, the upper mold core is fixed in the upper mold cavity, the lower surface of the upper mold has a raised ring around its periphery, the lower surface of the lower mold has a recessed lower mold cavity in the middle, the lower mold core is rotatably disposed in the lower mold cavity, the lower surface of the upper mold core and the upper surface of the lower mold core have corresponding concave and convex anti-slip patterns, the lower surface of the lower mold has a stepped portion around its periphery that cooperates with the raised ring, the lower mold core has an injection hole, the injection hole is connected to the injection molding machine through a connecting pipe, the adjusting assembly is disposed on the outer surface of the lower mold and connected to the lower mold core, and is used to adjust the clamping force of the lower mold core, and the tensioning assembly is disposed on the lower mold and located on the periphery of the lower mold cavity, and is used to adjust the tension force of the film.

[0019] Furthermore, the adjustment assembly includes an adjustment frame fixed to the lower mold, an adjustment rod rotatably mounted on the adjustment frame, a pressure plate threadedly connected to the adjustment rod, a positioning rod mounted on the pressure plate, a first spring sleeved on the positioning rod, a support rod passing through the lower mold and fixedly connected to the lower surface of the lower mold core, an adjustment plate sleeved on the support rod, and a second spring. The two ends of the first spring abut against the pressure plate and the adjustment plate, respectively, and the two ends of the second spring abut against the adjustment plate and the lower mold, respectively.

[0020] Furthermore, the tensioning assembly includes a through hole surrounding the lower mold cavity, a tensioning rod passing through the through hole, an adjusting nut threadedly connected to the lower part of the tensioning rod, a third spring sleeved on the lower part of the tensioning rod, and a groove surrounding the upper mold cavity. Each groove cooperates with the positioning rod to press the film. The two ends of the third spring abut against the adjusting nut and the lower mold, respectively.

[0021] By adopting the aforementioned technical solution, the beneficial effects of this invention are as follows: In this patterned sole manufacturing process, corresponding embossed anti-slip patterns are set on the lower and upper surfaces of the mold cavity. A film with an ink pattern is placed inside the mold cavity. Fluid-like transparent injection molding material is injected into the mold cavity from bottom to top. The transparent injection molding material heats the film and the ink pattern material on it, improving the film's softness and extensibility. The connection between the upper and lower molds in the injection mold allows the film to slide relative to the mold while maintaining a tight seal between the upper and lower molds. Under the pressure of the transparent injection molding material, the film slides relative to the mold and adheres well to the upper surface and / or sides of the mold cavity. That is, the film adheres to the embossed anti-slip pattern on the upper surface of the mold cavity. Furthermore, the fluid-like transparent injection molding material fills the grooves of the embossed anti-slip pattern, allowing the transparent injection molding material to fill the deeper embossed anti-slip pattern. Simultaneously, the heat carried by the transparent injection molding material melts the ink pattern and integrates it into the surface of the transparent injection molding material. This transfers the ink pattern to the upper surface of the outsole blank and integrates it into the transparent injection molding material, making the color band vivid. Combined with the structure of the embossed anti-slip pattern, the resulting pattern has a strong three-dimensional effect, allowing the pattern to be viewed through the bottom or side of the sole, improving the aesthetics of the sole. It can also form patterns on the raised areas with significant height variations on the side of the sole, further enhancing its appearance. The transfer of the ink pattern on the film allows the pattern to adhere to the sole. By tearing the film apart from the outsole blank, it can be bonded to the outsole blank through secondary injection molding or foaming. Compared to traditional fabrics with printed patterns, this process improves the connection strength between the outsole and midsole, eliminates the need for trimming, reduces processing costs, and increases processing efficiency. Furthermore, this process reduces manual labor intensity, enabling automated production and further improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a top view of the injection mold in an embodiment of the present invention;

[0023] Figure 2 This is a front view structural diagram of the injection mold in an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the mold assembly in the mold-opening state in an embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of the mold assembly in the mold-closed state in an embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of the mold assembly in the injection molding state in an embodiment of the present invention;

[0027] Figure 6 This is a cross-sectional view of the concave-convex roller in an embodiment of the present invention;

[0028] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle. Detailed Implementation

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0030] The embodiments of the present invention are as follows:

[0031] A process for manufacturing a shoe sole with a patterned layer includes the following steps:

[0032] 1) Cut the film with ink pattern on its surface into individual pattern units;

[0033] 2) The pattern unit is placed in the cavity of the injection mold. The periphery of the pattern unit is clamped and fixed by the upper and lower molds of the injection mold. The ink pattern of the pattern unit faces downward. The lower and upper surfaces of the mold cavity are provided with corresponding concave and convex anti-slip patterns.

[0034] 3) Inject transparent injection molding material into the mold cavity. The transparent injection molding material is injected from bottom to top and fills the mold cavity. The pattern unit slides relative to the injection mold, so that the pattern unit is attached to the upper surface and side of the mold cavity. The injected fluid transparent injection molding material causes the ink pattern on the film to melt and integrate into the surface layer of the transparent injection molding material.

[0035] 4) After cooling and molding, open the mold, peel off the film on the pattern unit, and form the base blank;

[0036] 5) Place the outsole blank at the bottom of the mold cavity of the shoe sole forming mold, and after the mold is closed, inject the injection material a second time to combine with the outsole blank. After cooling and molding, a shoe sole with a pattern layer is formed.

[0037] Step 5) above can also be: placing the outsole blank at the bottom of the mold cavity of the sole molding die, and placing the midsole blank on the outsole blank. The outsole blank and midsole are then bonded together through vulcanization and foaming. After cooling and molding, a sole with a patterned layer is formed.

[0038] This process for manufacturing patterned shoe soles involves creating corresponding raised and recessed anti-slip patterns on the lower and upper surfaces of the mold cavity. A film with an ink pattern is placed inside the mold cavity. A fluid, transparent injection molding material is then injected into the mold cavity from bottom to top. The transparent injection molding material heats the film and the ink pattern material on it, increasing the film's softness and elasticity. The connection between the upper and lower molds in the injection mold allows the film to slide relative to the mold while maintaining a tight seal between the upper and lower molds. Under the pressure of the transparent injection molding material, the film slides relative to the mold and adheres well to the upper surface and / or sides of the mold cavity. Specifically, the film adheres to the raised and recessed anti-slip pattern on the upper surface of the mold cavity, and the fluid, transparent injection molding material fills the grooves of the raised and recessed anti-slip pattern. The heat carried by the transparent injection molding material melts the ink pattern and integrates it into the surface of the transparent injection molding material. This transfers the ink pattern to the upper surface of the outsole blank and integrates it into the transparent injection molding material, making the color band vivid. At the same time, the combination with the structure of the embossed anti-slip pattern creates a strong three-dimensional effect. The pattern can be seen through the bottom or side of the outsole, improving the aesthetics of the outsole. Furthermore, the transfer of the ink pattern on the film allows the pattern to adhere to the outsole. By tearing the film apart from the outsole blank, it can be bonded to the outsole blank through secondary injection molding or foaming. Compared with the traditional application of fabric with imprinted patterns, this method can improve the connection strength between the outsole and midsole, while eliminating the trimming step and improving processing efficiency. At the same time, this process can reduce the intensity of manual labor, realize automated production, and further improve production efficiency.

[0039] In this embodiment, the transparent injection molding material comprises 43-52 parts of thermoplastic elastomer, 15-20 parts of ethylene-vinyl acetate copolymer, 1-3 parts of zinc oxide, 1-3 parts of stearic acid, and 0.5-1.5 parts of crosslinking agent. Specifically, the transparent injection molding material comprises 48 parts of thermoplastic elastomer, 16 parts of ethylene-vinyl acetate copolymer, 2 parts of zinc oxide, 3 parts of stearic acid, and 1.2 parts of crosslinking agent. The crosslinking agent is dicumyl peroxide. The thermoplastic elastomer comprises TPR and TPU, with a TPR to TPU ratio of 3:1. This enhances the fluidity of the transparent injection molding material in a fluid state and provides good elastic support for the shoe sole after injection molding, improving the comfort of the shoe sole. Of course, the thermoplastic elastomer can also be TPU or TPR, or PVC material can be used instead.

[0040] Furthermore, refer to Figure 1 and Figure 2 As shown, the injection mold includes a frame 1, a rotating shaft 2, an upper platen 3, a lower platen 4, a drive device 5, a transmission assembly 6, at least three lifting assemblies 7, at least three mold assemblies 8, and at least three injection molding machines. The rotating shaft 2 is rotatably mounted on the frame 1 via bearings 9. The rotating shaft 2 is distributed along the vertical direction. The drive device 5 is connected to the rotating shaft 2 via the transmission assembly 6 to realize the rotation of the rotating shaft 2. The upper platen 3 and the lower platen 4 are respectively fixed on the rotating shaft 2 and distributed along the axial direction of the rotating shaft 2. At least three mold mounting stations 10 are provided on the periphery of the rotating shaft 2 and between the upper platen 3 and the lower platen 4. Each of the lifting assemblies 7 and the mold assemblies 8 is located on the mold mounting station 10. Each of the mold assemblies 8 is connected to the injection molding machine. Specifically, there are six mold mounting stations 10, six lifting assemblies 7, six mold assemblies 8, and six injection molding machines.

[0041] The driving device 5 is a drive motor;

[0042] The transmission assembly 6 includes a drive pulley 61 on the output shaft of the drive motor 5, a driven pulley 62 on the rotating shaft 2, and a belt 63 wound around the drive pulley 61 and the driven pulley 62;

[0043] The lifting assembly 7 includes two lifting cylinders arranged side by side, and the lifting assembly 7 is fixed to the upper surface of the lower plate 4;

[0044] refer to Figure 3 , Figure 4 and Figure 5As shown, the mold assembly 8 includes an upper mold 81 fixed to the lower surface of the upper platen 3, a lower mold 82 disposed on the upper end of the lifting assembly 7, an upper mold core 83, a lower mold core 84, an adjusting assembly 85, and a tensioning assembly 86. The lower surface of the upper mold 81 has a recessed upper mold cavity 87 in the center, and the upper mold core 83 is fixed within the upper mold cavity 87. A raised ring 88 protrudes from the periphery of the lower surface of the upper mold 81. The lower surface of the lower mold 82 has a recessed lower mold cavity 89 in the center, and the lower mold core 84 is rotatably disposed within the lower mold cavity 89. The lower surface of mold 83 and the upper surface of mold core 84 are provided with corresponding anti-slip patterns. The lower surface of mold 82 is provided with a stepped portion 90 that cooperates with the convex ring 88. The mold core 84 is provided with an injection hole 91. The injection hole 91 is connected to the injection molding machine through a connecting pipe 92. The adjusting component 85 is provided on the outer surface of mold 82 and connected to mold core 84 for adjusting the clamping force of mold core 84. The tensioning component 86 is provided on mold 82 and located on the periphery of mold cavity 89 for adjusting the tension of film.

[0045] The adjustment assembly 85 includes an adjustment frame 851 fixed on the lower mold 82, an adjustment rod 852 rotatably mounted on the adjustment frame 851, a pressure plate 853 threadedly connected to the adjustment rod 852, a positioning rod 854 mounted on the pressure plate 853, a first spring 855 sleeved on the positioning rod 854, a support rod 856 passing through the lower mold 82 and fixedly connected to the lower surface of the lower mold core 84, an adjustment plate 857 sleeved on the support rod 856, and a second spring 858. The two ends of the first spring 855 abut against the pressure plate 853 and the adjustment plate 857, respectively, and the two ends of the second spring 858 abut against the adjustment plate 857 and the lower mold 82, respectively.

[0046] The tensioning assembly 86 includes a through hole 861 surrounding the lower mold cavity 89, a tensioning rod 862 passing through the through hole 861, an adjusting nut 863 threadedly connected to the lower part of the tensioning rod 862, a third spring 864 sleeved on the lower part of the tensioning rod 862, and a groove 865 surrounding the upper mold cavity 87. Each groove 865 cooperates with the tensioning rod 862 to press the film. The two ends of the third spring 864 abut against the adjusting nut 863 and the lower mold 82, respectively.

[0047] The working principle of the injection mold is as follows: the upper mold 81 and the lower mold 82 open, and the pattern unit is placed between the upper mold 81 and the lower mold 82. The lower mold 82 is driven to move upward by the lifting component 7. When the upper mold 81 and the lower mold 82 close, the pattern unit is clamped between the upper mold 81 and the lower mold 82. The circumference of the pattern unit is fixed by the cooperation between the convex ring 88 of the upper mold 81 and the stepped part 90 of the lower mold 82. Furthermore, the lower mold core 84 on the lower mold 82 pushes the middle part of the pattern unit to be inserted into the upper mold cavity. Within 87, the lower mold core 84 and the upper mold core 83 are clamped towards each other, thereby embedding the film into the anti-slip pattern of the upper mold. The tensioning rod 862 on the tensioning assembly 86 pushes the periphery of the pattern unit into the groove 865, causing the pattern unit to form folds and tighten within the mold cavity. The pattern unit within the mold cavity is then tightened, and injection molding is performed into the mold cavity via an injection molding machine. The transparent injection molding material pushes the lower mold core 84 to compress the first spring 855 and the second spring 858, causing them to move towards each other. The pressure within the mold cavity... The strength gradually increases, further allowing the film on the pattern unit to adhere to the lower mold core 84. Simultaneously, the tensioning rod 862, in conjunction with the third spring 864, achieves film tension, enabling precise transfer of the ink pattern from the pattern unit to the transparent injection molding material. This improves the quality of the molded transparent injection molding material and enhances the aesthetics of the pattern transfer. Furthermore, the arrangement of the first spring 855, the second spring 858, and the adjusting plate 857 on the support rod 856 allows the force acting on the lower mold core 84 to achieve dynamic balanced compression through the first spring 855 and the second spring 858. This reduces product defects caused by unstable injection pressure during the injection molding process, resulting in better injection molding stability of the injection molding material and improving the molding quality of the base blank. Rotating the adjusting rod also adjusts the synchronous compression stroke of the first spring 855 and the second spring 858, regulating the pressure within the mold cavity. This allows for the injection molding of materials with suitable compositions, expanding the applicability and improving ease of use.

[0048] Furthermore, the preparation process of the film with the ink pattern attached is as follows:

[0049] a. Unwinding a first film in a roll shape, the first film being elastic, specifically, the first film being an elastic film mainly made of polyurethane material;

[0050] b. The first film is pressed by the concave and convex rollers, so that the upper surface of the first film presents a matrix-distributed storage tank. During the pressing process, the concave and convex rollers press the ink they carry into the storage tank. Through the elastic contraction of the first film, the storage tank shrinks in volume and fixes the ink in the storage tank.

[0051] c. Dry the product from step b so that the ink adheres to the sides and bottom of the storage tank;

[0052] d. Unwind the second film, which is in the form of a roll, and laminate it onto the upper surface of the first film to form a film with an ink pattern attached.

[0053] In use, the second film is peeled off, the first film is placed in the mold cavity, and transparent injection molding material carrying heat is injected into the mold cavity. This heats and melts the ink in the storage tank of the first film, and the tension rod on the tensioning assembly expands the first film, causing the opening of the storage tank on the first film to open. This reduces the adhesion between the ink and the first film, allowing more ink to be incorporated into the upper part of the transparent injection molding material, improving the color effect of the product. The pattern is formed by the distribution of ink stored in each storage tank.

[0054] For details, please refer to Figure 6 and Figure 7 As shown, the convex and concave rollers include a convex roller 20 and a concave roller 30. The convex roller 20 includes a first rotating shaft 201 and a first roller body 202 disposed on the first rotating shaft 201. A plurality of protrusions 203 are distributed in a matrix on the outer circumference of the first roller body 202. Each protrusion 203 has a frustum-shaped structure. A material groove 204 is recessed in the middle of the outer surface of each protrusion 203. The bottom of the material groove 204 has a ventilation channel 205 communicating with the outside. The concave roller 30 includes a second rotating shaft 301 and a second roller body 302 disposed on the second rotating shaft 301. The second roller body 302 has a shaping groove 303 that mates with the protrusions 203. In use, ink is sprayed onto... The ink is injected into the material groove 303 on each protrusion 203. Due to the high tension of the ink, the injected ink can block the ventilation channel 205. Then, the convex roller 20 and concave roller 30 are driven to rotate relative to each other, and the first film passes between the convex roller 20 and the concave roller 30. The first film is pressed out of the storage groove by the cooperation of the protrusion 203 and the shaping groove 303. At this time, the material groove 204 carries the ink and is embedded in the storage groove. When the protrusion 203 separates from the storage groove of the first film, the elastic contraction of the first film causes it to cover the protrusion 203 and gradually reduce its volume. Under the action of the ventilation channel 205, the tension between the ink and the material groove is reduced, so that the ink enters the storage groove, realizing the transfer and fixation of the ink.

[0055] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A manufacturing process for a shoe sole with a patterned layer, characterized in that: Includes the following steps: 1) Cut the film with ink pattern on its surface into individual pattern units; 2) The pattern unit is placed in the cavity of the injection mold. The periphery of the pattern unit is clamped and fixed by the upper and lower molds of the injection mold. The ink pattern of the pattern unit faces downward. The lower and upper surfaces of the mold cavity are provided with corresponding concave and convex anti-slip patterns. The injection mold includes a frame, a rotating shaft mounted on the frame, an upper platen, a lower platen, a drive device, a transmission assembly, at least three lifting assemblies, at least three mold assemblies, and at least three injection molding machines. The rotating shaft is rotatably mounted on the frame via bearings and is distributed along the vertical direction. The drive device is connected to the rotating shaft via the transmission assembly to realize the rotation of the rotating shaft. The upper platen and lower platen are respectively fixed on the rotating shaft and distributed along the axial direction of the rotating shaft. At least three mold mounting stations are provided on the circumference of the rotating shaft and between the upper and lower platens. Each of the lifting assemblies and mold assemblies is located at the mold mounting station, and each of the mold assemblies is connected to the injection molding machine. The mold assembly includes an upper mold fixed to the lower surface of the upper platen, a lower mold located at the upper end of the lifting assembly, an upper mold core, a lower mold core, an adjusting assembly, and a tensioning assembly. The lower surface of the upper mold has a recessed upper mold cavity in the middle, and the upper mold core is fixed inside the upper mold cavity. A raised ring is provided around the lower surface of the upper mold, and the lower surface of the lower mold has a recessed lower mold cavity in the middle. The lower mold core is rotatably located inside the lower mold cavity. The lower surface of the upper mold core and the upper surface of the lower mold core are provided with corresponding concave and convex anti-slip patterns. The lower surface of the lower mold has a stepped portion around the circumference that cooperates with the raised ring. The lower mold core is provided with an injection hole, which is connected to the injection molding machine through a connecting pipe. The adjusting assembly is located on the outer surface of the lower mold and connected to the lower mold core for adjusting the clamping force of the lower mold core. The tensioning assembly is located on the lower mold and on the periphery of the lower mold cavity for adjusting the tension force of the film. 3) Inject transparent injection molding material into the mold cavity. The transparent injection molding material is injected from bottom to top and fills the mold cavity. The pattern unit slides relative to the injection mold, so that the pattern unit is attached to the upper surface and / or side of the mold cavity. The injected fluid transparent injection molding material causes the ink pattern on the film to melt and integrate into the surface layer of the transparent injection molding material. 4) After cooling and molding, open the mold, peel off the film on the pattern unit to form the base blank.

2. The manufacturing process of the shoe sole with a patterned layer according to claim 1, characterized in that: The sole manufacturing process further includes: placing the outsole blank at the bottom of the mold cavity of the sole forming mold, and placing the midsole blank on the outsole blank, and forming the outsole blank and midsole through vulcanization foaming; or placing the outsole blank at the bottom of the mold cavity of the sole forming mold, and injecting a second injection molding material to combine with the outsole blank after mold closing, and forming a sole with a pattern layer after cooling and molding.

3. The manufacturing process of the shoe sole with a patterned layer according to claim 2, characterized in that: The transparent injection molding material comprises 43-52 parts of thermoplastic elastomer, 15-20 parts of ethylene-vinyl acetate copolymer, 1-3 parts of zinc oxide, 1-3 parts of stearic acid, and 0.5-1.5 parts of crosslinking agent.

4. The manufacturing process of the shoe sole with a patterned layer according to claim 3, characterized in that: The transparent injection molding material comprises 48 parts of thermoplastic elastomer, 16 parts of ethylene-vinyl acetate copolymer, 2 parts of zinc oxide, 3 parts of stearic acid, and 1.2 parts of crosslinking agent.

5. The manufacturing process of the shoe sole with a patterned layer according to claim 3, characterized in that: The crosslinking agent is dicumyl peroxide.

6. The manufacturing process of the shoe sole with a patterned layer according to claim 3, characterized in that: The thermoplastic elastomer includes TPR and TPU, and the ratio of TPR to TPU is 3:

1.

7. The manufacturing process for a shoe sole with a patterned layer according to any one of claims 1 to 6, characterized in that: The adjustment assembly includes an adjustment frame fixed to the lower mold, an adjustment rod rotatably mounted on the adjustment frame, a pressure plate threadedly connected to the adjustment rod, a positioning rod mounted on the pressure plate, a first spring sleeved on the positioning rod, a support rod passing through the lower mold and fixedly connected to the lower surface of the lower mold core, an adjustment plate sleeved on the support rod, and a second spring. The two ends of the first spring abut against the pressure plate and the adjustment plate, respectively, and the two ends of the second spring abut against the adjustment plate and the lower mold, respectively.

8. The manufacturing process of the shoe sole with a patterned layer according to claim 7, characterized in that: The tensioning assembly includes a through hole surrounding the lower mold cavity, a tensioning rod passing through the through hole, an adjusting nut threaded to the lower part of the tensioning rod, a third spring sleeved on the lower part of the tensioning rod, and a groove surrounding the upper mold cavity. Each groove cooperates with a positioning rod to press the film. The two ends of the third spring abut against the adjusting nut and the lower mold, respectively.

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