Gradient colorful vamp and production process thereof

Abstract

The invention belongs to the technical field of shoe manufacturing and vamp decoration, and particularly relates to a gradient colorful vamp and a production process thereof, the gradient colorful vamp comprises a shoe body, the shoe body comprises a vamp, the lower end of the vamp is fixedly connected with a sole, and the outer surface of the vamp is provided with a three-dimensional decoration mark. According to the colorful vamp, the feeding mechanism is arranged, a motor is used for driving a rotating rod, a gear and a chain to be linked, and synchronous transmission of a second gear and a second chain in the horizontal direction is matched, so that circulating conveying of multiple sets of containing plates is achieved, a transparent surface layer can be accurately positioned through limiting grooves, with the depth being 1-1.5 mm, in the surfaces of the containing plates, and displacement in the conveying process is avoided; according to the automatic feeding device, materials do not need to be manually placed one by one, automatic batch feeding of the transparent surface layers is achieved, manual operation intensity and time cost are greatly reduced, meanwhile, a stable basis is provided for subsequent printing and injection molding procedures through accurate positioning, and the defective rate caused by material deviation is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of footwear manufacturing and upper decoration technology, and in particular to a gradient seven-color upper and its production process. Background Technology

[0002] With the increasing demand from the consumer market for personalized and fashionable footwear, shoe upper decoration techniques have become an important means to enhance the visual appeal and added value of products. Currently, common shoe upper decoration methods mainly include screen printing, heat transfer printing, patch stitching, embroidery, and direct injection molding.

[0003] While screen printing and heat transfer printing can achieve rich pattern representations, their color layers are usually located on the surface of the shoe upper. Over long-term wear, these layers are susceptible to fading, peeling, and UV exposure, resulting in poor durability. Patchwork or adhesive-bonded decorative parts can achieve a three-dimensional effect, but they suffer from poor adhesion, easy separation, and stiffness at bends, affecting wearing comfort. Embroidery offers strong three-dimensionality but struggles to achieve subtle color gradients and has lower production efficiency. Conventional injection-molded three-dimensional decorations often use a single color or surface spraying, resulting in color differences, easy coating wear, and insufficient adhesion to the substrate.

[0004] In addition, in the existing production process, material feeding and positioning mostly rely on manual operation, which is inefficient and difficult to guarantee positioning accuracy, easily leading to poor product consistency and increased defect rate.

[0005] To address the above problems, this invention proposes a gradient seven-color shoe upper and its manufacturing process. Summary of the Invention

[0006] Based on the existing technical problems in shoe upper decoration and manufacturing, such as the poor bonding of three-dimensional decorative parts and poor wearing comfort, low efficiency due to reliance on manual material feeding in the production process, high defect rate caused by material positioning deviation, and poor material compatibility leading to delamination and discoloration, this invention proposes a gradient seven-color shoe upper and its production process.

[0007] The present invention proposes a gradient seven-color shoe upper, including a shoe body, the shoe body including an upper, the lower end of the upper being fixedly connected to a sole, and a three-dimensional decorative logo provided on the outer surface of the upper. The three-dimensional decorative logo is integrally formed by a transparent surface layer, a gradient color layer printed on the inner side of the transparent surface layer, and a base layer disposed on the inner side of the gradient color layer. The gradient color layer presents a smooth transition of two or more colors.

[0008] Preferably, the color pattern of the gradient color layer is fixed to the inner surface of the transparent surface layer by a reverse printing process.

[0009] Preferably, the base layer of the three-dimensional decorative mark is made of silicone and is integrated with the transparent surface layer by in-mold injection molding.

[0010] Preferably, the transparent surface layer is a PET film or a PMMA film.

[0011] Preferably, the manufacturing process of a gradient seven-color shoe upper includes the following specific steps:

[0012] S1. A reverse gradient color pattern layer is formed on the inner surface of the transparent surface layer film by precision printing;

[0013] S2. Place the printed film into the cavity of the precision injection mold, with the printed surface facing the inside of the mold cavity;

[0014] S3. Inject molten silicone material into the mold cavity to form it on the back of the film and permanently bond it thereto. After cooling, a three-dimensional logo with gradient colors is obtained.

[0015] S4. The three-dimensional mark is punched and separated from the film carrier and fixed to a predetermined position on the outer surface of the shoe upper.

[0016] Preferably, the equipment involved in steps S1, S2, and S3 includes an operating table, with a lower mold embedded in the upper end of the operating table, an upper mold positioned directly above the operating table, an injection joint positioned at the upper end of the upper mold, the lower inner wall of the injection joint being fixedly connected to the inner wall of the molding cavity on the lower surface of the upper mold, a feeding mechanism positioned on one side of the lower mold, the transparent surface layer being arranged in an array inside the feeding mechanism, a pushing mechanism positioned at the upper end of the operating table, and a cylinder positioned below the operating table, the upper end of the cylinder penetrating the upper surface of the lower mold and being fixedly connected to the lower surface of the upper mold.

[0017] Preferably, the feeding mechanism includes a U-shaped frame, with a motor embedded in one side of the U-shaped frame. Cylindrical grooves are symmetrically formed at the lower end of the U-shaped frame along its opening and height directions. Bearings are fixedly connected to the inner walls of adjacent upper and lower cylindrical grooves. A rotating rod is fixedly connected to the inner ring of the bearing. One end of the rotating rod is fixedly connected to the output shaft of the motor, and a gear is fixedly sleeved at the other end of the rotating rod. Chains mesh between the surfaces of two adjacent gears in the vertical direction. Placement plates are arranged in an array on the surface of the chain. A fan-shaped groove is formed vertically on the upper surface of the operating table, located directly below the gear. A second gear is fixedly sleeved on the outer surface of the rotating rod near the motor, and a second chain meshes between two horizontally adjacent second gears.

[0018] Preferably, the surface of the placement plate is provided with an end-limiting groove that corresponds to the transparent surface layer, and the depth of the limiting groove is 1-1.5mm.

[0019] Preferably, the pushing mechanism includes a second cylinder disposed on one side of the U-shaped frame, the surface of the second cylinder being fixedly connected to the surface of the operating table, a first sliding groove being formed on the upper surface of the operating table, a second sliding groove being formed on the surface of the lower mold, a third cylinder being disposed on the upper surface of the operating table, a U-shaped rod being fixedly connected to one end of the third cylinder, a T-shaped rod being fixedly connected to both ends of the U-shaped rod, the surface of the U-shaped rod being slidably connected to the inner wall of the second sliding groove, a hydraulic cylinder being disposed below the operating table, the bottom wall of the forming cavity of the lower mold being configured to move up and down, the upper end of the hydraulic cylinder being fixedly connected to the bottom wall of the forming cavity of the lower mold, and a pushing rod being fixedly connected to one end of the second cylinder via a round rod.

[0020] Preferably, the surface of the push rod is adapted to the side surface of the transparent surface layer.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. By setting up a feeding mechanism, the motor drives the rotating rod, gears and chains in linkage, and the horizontal gear two and chain two are synchronously transmitted to realize the cyclic conveying of multiple sets of placement plates. The limiting groove with a depth of 1-1.5mm on the surface of the placement plate can accurately position the transparent surface layer and avoid displacement during the conveying process. There is no need for manual placement of materials one by one, realizing automated batch feeding of transparent surface layers, which greatly reduces the intensity of manual operation and time costs. At the same time, the accurate positioning provides a stable foundation for subsequent printing and injection molding processes, effectively reducing the defect rate caused by material deviation.

[0023] 2. By setting up a pushing mechanism, cylinder two drives the pushing rod adapted to the side of the transparent surface layer to achieve precise material pushing. Cylinder three drives the U-shaped rod and T-shaped rod to slide along the slide groove for auxiliary positioning, and cooperates with the hydraulic cylinder to adjust the height of the bottom wall inside the forming cavity of the lower mold, ensuring that the transparent surface layer fits tightly with the mold cavity. Combined with the former, the three-dimensional decorative mark is removed after molding. This mechanism realizes the automated connection of material from conveying to mold cavity positioning. The pushing process is smooth and without damage, ensuring the bonding accuracy between the transparent surface layer and the silicone substrate during injection molding, improving the structural consistency of the three-dimensional decorative mark, and making the production process more seamless, further improving the overall production efficiency.

[0024] 3. Combining the benefits of 1 and 2, and using reverse printing and in-mold injection molding processes, the gradient color layer presents a smooth transition between two or more colors. Combined with the high transparency of PET or PMMA film, it creates a visually striking seven-color gradient effect, significantly enhancing the personalization and aesthetics of the shoe upper. Reverse printing hides the color layer inside the transparent surface layer, preventing color fading caused by daily wear and tear. The silicone matrix layer is flexible and comfortable and firmly bonded to the transparent surface layer. The one-piece molding structure eliminates the risk of delamination, ensuring the durability of the decorative logo, improving the comfort of wearing the shoe upper, and extending the overall lifespan of the product. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a gradient seven-color shoe upper proposed in this invention;

[0026] Figure 2 This is a three-dimensional view of a gradient seven-color shoe upper decorative logo proposed in this invention;

[0027] Figure 3 This is an injection molding drawing of a three-dimensional decorative logo for a gradient seven-color shoe upper, as proposed in this invention.

[0028] Figure 4 This is a three-dimensional view of the propulsion mechanism for a gradient seven-color shoe upper proposed in this invention;

[0029] Figure 5 This is a three-dimensional view of a U-shaped rod for a gradient seven-color shoe upper proposed in this invention;

[0030] Figure 6 This is a rear view of a gradient seven-color shoe upper proposed in this invention;

[0031] Figure 7 This is a diagram showing the location of the feeding mechanism for a gradient seven-color shoe upper proposed in this invention;

[0032] Figure 8 This invention proposes a gradient seven-color shoe upper. Figure 7 Enlarged view of point A in the middle;

[0033] Figure 9 This is a diagram showing the position of the cylinder two in a gradient seven-color shoe upper proposed in this invention;

[0034] Figure 10 This invention proposes a gradient seven-color shoe upper. Figure 9 Enlarged view of point B in the middle.

[0035] In the diagram: 1. Operating table; 2. Lower mold; 3. Upper mold; 4. Injection joint; 5. Feeding mechanism; 51. U-shaped frame; 52. Motor; 53. Rotating rod; 54. Gear; 55. Chain; 56. Placement plate; 57. Sector groove; 58. Chain II; 59. Gear II; 6. Three-dimensional decorative sign; 61. Transparent surface layer; 62. Base layer; 7. Pushing mechanism; 71. Cylinder II; 72. Slide I; 73. Slide II; 74. U-shaped rod; 75. Cylinder III; 76. T-shaped rod; 77. Hydraulic cylinder; 78. Push rod; 8. Cylinder. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Reference Figure 1 A gradient seven-color shoe upper includes a shoe body, the shoe body includes an upper, the lower end of the upper is fixedly connected to a sole, and a three-dimensional decorative logo 6 is provided on the outer surface of the upper. The three-dimensional decorative logo 6 is integrally formed by a transparent surface layer 61, a gradient color layer printed on the inner side of the transparent surface layer 61, and a base layer 62 provided on the inner side of the gradient color layer. The gradient color layer presents a smooth transition of two or more colors.

[0038] In this embodiment, the color pattern of the gradient color layer is fixed to the inner surface of the transparent surface layer 61 by a reverse printing process.

[0039] Specifically, the reverse printing process prints the colored pattern on the inside of the transparent surface layer 61, so that the pattern is completely covered by the transparent layer. On the one hand, it can isolate the pattern from external friction, sweat, dust and other erosion, prevent the colored layer from peeling off and fading, and extend the life of the decoration. On the other hand, the transparent surface layer 61 has no printing marks, which can preserve the color saturation and smoothness of the gradient transition of the pattern to the greatest extent. This ensures that when viewed from the outside, the seven-color gradient effect is clear and transparent, and the visual experience is better. At the same time, the printing precision can be controlled at the micron level, effectively avoiding the problems of color breaks or uneven transitions.

[0040] In this embodiment, the base layer 62 of the three-dimensional decorative mark 6 is made of silicone and is integrated with the transparent surface layer 61 by in-mold injection molding.

[0041] Specifically, silicone material possesses excellent flexibility, wear resistance, and aging resistance, and is highly adaptable to the bending deformation of the shoe upper, preventing hard marks or breakage due to bending during wear. The in-mold injection molding process allows molten silicone to be directly bonded to the transparent surface layer 61 within the mold, forming a strong bond between the molecules, eliminating gaps caused by artificial bonding and completely preventing delamination and peeling. At the same time, silicone has a low shrinkage rate after cooling, which can accurately replicate the shape of the mold cavity, ensuring the dimensional accuracy and appearance integrity of the three-dimensional decorative logo.

[0042] In this embodiment, the transparent surface layer 61 is a PET film or a PMMA film.

[0043] Specifically, PET film has high transparency, excellent mechanical toughness and abrasion resistance, is not easily scratched and is tear-resistant, and can maintain a clear visual effect for a long time, making it suitable for the wear and tear scenarios of daily use of shoe uppers; PMMA film has higher light transmittance, excellent optical performance, more transparent presentation of gradient colors, and strong weather resistance, and is not easily deformed or yellowed in high and low temperature environments. Both materials are lightweight and will not increase the weight of the shoe upper. At the same time, they have good chemical stability and good compatibility with printing inks and silicone materials.

[0044] In this embodiment, refer to Figures 1-10 The production process of a gradient seven-color shoe upper involves the following specific steps:

[0045] S1. A reverse gradient color pattern layer is formed on the inner surface of the transparent surface layer 61 by precision printing.

[0046] S2. Place the printed film into the cavity of the precision injection mold, with the printed surface facing the inside of the mold cavity;

[0047] S3. Inject molten silicone material into the mold cavity to form it on the back of the film and permanently bond it thereto. After cooling, a three-dimensional logo with gradient colors is obtained.

[0048] S4. Cut the three-dimensional logo off the film carrier and fix it to a predetermined position on the outer surface of the shoe upper.

[0049] In this embodiment, the equipment involved in S1, S2 and S3 includes an operating table 1, a lower mold 2 is embedded in the upper end of the operating table 1, an upper mold 3 is arranged directly above the operating table 1, an injection joint 4 is arranged at the upper end of the upper mold 3, the lower end of the inner wall of the injection joint 4 is fixedly connected to the inner wall of the molding cavity on the lower surface of the upper mold 3, a feeding mechanism 5 is arranged on one side of the lower mold 2, a transparent surface layer 61 is arranged in an array inside the feeding mechanism 5, a pushing mechanism 7 is also arranged at the upper end of the operating table 1, and a cylinder 8 is arranged below the operating table 1, the upper end of the cylinder 8 penetrates the upper surface of the lower mold 2 and is fixedly connected to the lower surface of the upper mold 3.

[0050] Specifically, cylinder 8 provides stable lifting power for upper mold 3. The mold closing force can be precisely controlled by adjusting the air pressure to avoid excessive pressure causing damage to the transparent surface layer or insufficient pressure affecting the injection molding effect. The injection joint 4 adopts a sealed design, with no gaps at the connection with the molding cavity of upper mold 3, ensuring that the molten silicone is accurately injected into the cavity and is easy to disassemble and clean, reducing the impact of residual glue accumulation on product quality. The operating table 1 provides a stable installation base for each component, and the embedded design of lower mold 2 improves the positioning accuracy of the mold, prevents mold displacement during operation, and ensures the alignment of the upper and lower mold cavities.

[0051] In this embodiment, the feeding mechanism 5 includes a U-shaped frame 51. A motor 52 is embedded in one side of the U-shaped frame 51. Cylindrical grooves are symmetrically opened at the lower end of the U-shaped frame 51 along its opening direction and height direction. Bearings are fixedly connected to the inner walls of adjacent upper and lower cylindrical grooves. A rotating rod 53 is fixedly connected to the inner ring of the bearing. One end of the rotating rod 53 is fixedly connected to the output shaft of the motor 52. A gear 54 is fixedly sleeved at the other end of the rotating rod 53. A chain 55 is meshed on the surfaces of two adjacent gears 54 in the vertical direction. A placement plate 56 is arranged in an array on the surface of the chain 55. A fan-shaped groove 57 is opened in the vertical direction on the upper surface of the operating table 1. The fan-shaped groove 57 is located directly below the gear 54. A second gear 59 is fixedly sleeved on the outer surface of the end of the rotating rod 53 near the motor 52. A second chain 58 meshes between two horizontally adjacent second gears 59.

[0052] Specifically, motor 52 is a speed-regulating motor, which can adjust the rotation speed according to the production rhythm; the meshing transmission precision of gear 54 and chain 55 is high, ensuring that the placement plate 56 moves up and down at a uniform speed; gear 59 and chain 58 realize the synchronous operation of multiple sets of rotating rods 53, so that the placement plate 56 driven by the chains 55 on both sides moves in a consistent manner, avoiding material conveying deviation; the arc of the fan-shaped groove 57 is adapted to the rotation trajectory of gear 54, providing sufficient movement space for chain 55 and placement plate 56, preventing interference with the surface of operating table 1, and ensuring continuous and uninterrupted feeding process.

[0053] In this embodiment, the surface of the placement plate 56 is provided with an end limiting groove that is connected to the transparent surface layer 61, and the depth of the limiting groove is 1-1.5mm.

[0054] Specifically, the depth of the limiting groove is designed to fit the conventional thickness of the transparent surface layer. The depth of 1-1.5mm can stably limit the transparent surface layer 61 to prevent displacement or tipping due to vibration or turning during the conveying process, and will not obstruct the subsequent pushing mechanism if the groove is too deep. At the same time, the inner wall of the limiting groove is smooth to avoid scratching the printed surface or outer surface of the transparent surface layer 61, ensuring the integrity of the material and providing a basis for the accuracy of subsequent reverse printing and injection molding.

[0055] In this embodiment, the pushing mechanism 7 includes a second cylinder 71 disposed on one side of the U-shaped frame 51. The surface of the second cylinder 71 is fixedly connected to the surface of the operating table 1. A first slide groove 72 is provided on the upper surface of the operating table 1, and a second slide groove 73 is provided on the surface of the lower mold 2. A third cylinder 75 is disposed on the upper surface of the operating table 1. A U-shaped rod 74 is fixedly connected to one end of the third cylinder 75. T-shaped rods 76 are fixedly connected to both ends of the U-shaped rod 74. The surface of the U-shaped rod 74 is slidably connected to the inner wall of the second slide groove 73. A hydraulic cylinder 77 is disposed below the operating table 1. The bottom wall of the forming cavity of the lower mold 2 is configured to move up and down. The upper end of the hydraulic cylinder 77 is fixedly connected to the bottom wall of the forming cavity of the lower mold 2. A push rod 78 is fixedly connected to one end of the second cylinder 71 through a round rod.

[0056] Specifically, slide 1 72 and slide 2 73 provide precise guidance for the moving parts of the pushing mechanism, ensuring that cylinder 2 71 and cylinder 3 75 are driven without deviation; U-shaped rod 74 and T-shaped rod 76 cooperate to assist in positioning the transparent surface layer 61 entering the molding cavity from the side, avoiding tilting or deviation during the pushing process that would prevent normal entry; hydraulic cylinder 77 can flexibly adjust the height of the bottom wall of the molding cavity of the lower mold 2 according to the thickness of the transparent surface layer 61 or the injection molding requirements, so that the transparent surface layer 61 fits tightly with the inner wall of the mold cavity, preventing silicone from overflowing from the gaps during injection molding, and ejecting the product after injection molding for easy material removal.

[0057] In this embodiment, the surface of the push rod 78 is adapted to the side of the transparent surface layer 61.

[0058] Specifically, the surface of the push rod 78 adopts an arc shape consistent with the side profile of the transparent surface layer 61, so that the force area is uniform when the two are in contact, avoiding excessive local pressure that could cause deformation, breakage, or damage to the printed pattern of the transparent surface layer; the adapted structural design can ensure that the force is accurately transmitted during pushing, and push the transparent surface layer 61 smoothly and accurately to the predetermined position of the lower mold 2 without problems such as offset or jamming, ensuring consistent positioning accuracy of each material, thereby improving the consistency of products in mass production and reducing defects caused by positioning deviation.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A gradient multi-color shoe upper, comprising a shoe body, the shoe body comprising a shoe upper, a lower end of the shoe upper being fixedly connected with a shoe sole, characterized in that: The outer surface of the shoe upper is provided with a three-dimensional decorative logo (6), which is integrally formed by a transparent surface layer (61), a gradient color layer printed on the inner side of the transparent surface layer (61), and a base layer (62) provided inside the gradient color layer.

2. The gradient iridescent upper of claim 1, wherein: The color pattern of the gradient color layer is fixed on the inner surface of the transparent surface layer (61) by reverse printing process.

3. A gradient iridescent upper according to claim 2, wherein: The base layer (62) of the three-dimensional decorative logo (6) is made of silica gel material and is combined with the transparent surface layer (61) by in-mold injection molding process.

4. The gradient iridescent upper of claim 1, wherein: The transparent surface layer (61) is PET film or PMMA film.

5. A process for the production of a gradual multi-coloured shoe upper as claimed in claim 4, wherein, The specific steps are as follows: S1, on the inner surface of the film of the transparent surface layer (61), a reverse gradient color pattern layer is formed by precise printing; S2, the printed film is placed in the cavity of the precise injection mold, and the printing surface faces the inside of the mold cavity; S3, melt the silica gel material and inject it into the mold cavity, so that it is formed on the back of the film and permanently combined with it, and after cooling, a three-dimensional logo with gradient color is obtained; S4, the three-dimensional logo is separated from the film carrier and fixed on the predetermined position of the outer surface of the shoe upper.

6. A process for the production of a gradient iridescent shoe upper according to claim 5, characterized in that, The devices involved in S1, S2 and S3 include an operation table (1), the upper end of which is embedded with a lower mold (2), the upper surface of which is provided with an upper mold (3), the upper end of which is provided with an injection joint (4), the lower end of which is fixedly connected with the inner wall of the forming cavity of the lower surface of the upper mold (3), one side of the lower mold (2) is provided with a feeding mechanism (5), the inside of which is provided with the transparent surface layer (61), the upper end of the operation table (1) is also provided with a pushing mechanism (7), the lower surface of the operation table (1) is provided with a pneumatic cylinder (8), the upper end of which penetrates the upper surface of the lower mold (2) and is fixedly connected with the lower surface of the upper mold (3).

7. The production process of a gradual seven-color shoe upper according to claim 6, characterized in that: The feeding mechanism (5) includes a U-shaped frame (51), one side of which is embedded with a motor (52), the lower end of which is symmetrically provided with a cylindrical groove along the opening direction and the height direction, respectively, the inner walls of the adjacent upper and lower cylindrical grooves are fixedly connected with bearings, the inner ring of the bearing is fixedly connected with a rotating rod (53), one end of the rotating rod (53) is fixedly connected with the output shaft of the motor (52), the other end of the rotating rod (53) is fixedly sleeved with a gear (54), the surfaces of two adjacent vertical gears (54) are engaged with a chain (55), the surface of the chain (55) is arrayed with a placing plate (56), the upper surface of the operation table (1) is vertically provided with a fan-shaped groove (57), the fan-shaped groove (57) is located directly below the gear (54), the outer surface of one end of the rotating rod (53) close to the motor (52) is fixedly sleeved with a gear two (59), and the chain two (58) is engaged between two horizontal adjacent gears two (59).

8. The production process of a gradual seven-color shoe upper according to claim 7, characterized in that: The surface of the placing plate (56) is provided with a limiting groove at the end of the transparent surface layer (61), and the depth of the limiting groove is 1-1.5 mm.

9. The production process of a gradual seven-color shoe upper according to claim 8, characterized in that: The pushing mechanism (7) comprises a second air cylinder (71) arranged on one side of the U-shaped frame (51), the surface of the second air cylinder (71) is fixedly connected with the surface of the operation table (1), the upper surface of the operation table (1) is provided with a first sliding groove (72), the surface of the lower mold (2) is provided with a second sliding groove (73), the upper surface of the operation table (1) is provided with a third air cylinder (75), one end of the third air cylinder (75) is fixedly connected with a U-shaped rod (74), the two ends of the U-shaped rod (74) are respectively fixedly connected with T-shaped rods (76), the surface of the U-shaped rod (74) is slidably connected with the inner wall of the second sliding groove (73), the lower portion of the operation table (1) is provided with a hydraulic cylinder (77), the inner bottom wall of the forming cavity of the lower mold (2) is arranged in an up-and-down movable manner, the upper end of the hydraulic cylinder (77) is fixedly connected with the inner bottom wall of the forming cavity of the lower mold (2), and one end of the second air cylinder (71) is fixedly connected with a pushing rod (78) through a round rod.

10. The process for producing a gradual seven-color shoe upper according to claim 9, wherein; The surface of the pushing rod (78) is matched with the side surface of the transparent surface layer (61).

Images