A molded shoe anti-pinch structure and molded shoes

Abstract

This utility model provides a molded shoe anti-pinch structure and a molded shoe. The molded shoe anti-pinch structure includes an upper, with webbing on the outer surface of the upper; when the mold is closed, the position of the webbing covers the position of the mold seam; on the inner surface or interior of the upper, on the left side of the left edge and the right side of the right edge of the webbing located at the corresponding mold seam position, there are respectively a buffer sheet that protrudes towards the outer surface of the upper when the mold is pressed, so that the outer surface of the webbing at the corresponding mold seam position is not higher than the outer surface of the upper where the buffer sheet is located; thereby ensuring that the webbing will not be pulled into the mold seam during mold closing, causing curling or pressure damage.

Description

Technical Field

[0001] This utility model belongs to the field of footwear manufacturing, specifically relating to a molded shoe anti-pinch structure and molded shoes. Background Technology

[0002] In traditional molded shoe production, the upper consists of the upper itself and the lining, with the upper on the outside and the lining on the inside. The outer surface of the upper requires webbing. During molding, the upper is fitted onto a shoe last, and the upper and midsole are placed in a mold under pressure and heat. The rubber in the mold melts, forming the shape of the sole and wrapping around the bottom edge of the upper and the midsole. After vulcanization, the mold is opened; the rubber has now become a solid sole, permanently bonded to the upper. The molded shoe is then removed from the mold and last. During molding, the webbing, sewn to the outer edge of the upper, directly contacts the mold, corresponding to the mold seam. The high pressure during mold closing causes the edges of the webbing to easily get caught in the mold seam, resulting in curling and damage (problems occurring in 50%-90% of cases). Existing processes use manual trimming or temporary glue application for fixation, which is ineffective and inefficient. Summary of the Invention

[0003] This utility model provides a molded shoe anti-pinch structure and a molded shoe.

[0004] The purpose of this utility model is achieved in the following way: a molded shoe anti-pinch structure, including an upper, the outer surface of which is provided with a webbing; when the mold is closed, the position of the webbing covers the position of the mold seam; on the inner surface or inside of the upper, on the left side of the left edge and the right side of the right edge of the webbing located at the corresponding mold seam position, a buffer sheet is respectively provided, which protrudes towards the outer surface of the upper when the mold is pressed, so that the outer surface of the webbing at the corresponding mold seam position is not higher than the outer surface of the upper where the buffer sheet is located.

[0005] When the mold is closed, the outer surface of the webbing at the mold closing seam is flush with or nearly flush with the outer surface of the side panel where the buffer sheet is located on the left and right sides.

[0006] The buffer sheet is an elastic sheet capable of elastic deformation under mold closing pressure.

[0007] A gap is provided between the left edge of the webbing and the left buffer piece at the mold closing position, and between the right edge of the webbing and the right buffer piece at the mold closing position; the gap is within 1 mm; an overflow prevention groove is formed at the gap position when the mold is closed.

[0008] The length of the buffer sheet covers the entire mold joint; the width of the buffer sheet is 10 to 15 mm; and the thickness of the buffer sheet is 0.8 to 1.5 mm.

[0009] The buffer sheet is an EVA sheet with a density of 0.15-0.25 g / cm³ and a Shore hardness of 35 to 45. The width of the buffer sheet is 2-3 mm wider than the width of the webbing. A gap of 0.5 mm is provided between the left edge of the webbing and the left buffer sheet at the mold seam position, and between the right edge of the webbing and the right buffer sheet at the mold seam position. The buffer sheet is adhered to the inner surface of the upper.

[0010] The shoe upper includes an upper and an lining, and the cushioning piece is fixedly disposed on the inner surface of the upper.

[0011] The molded shoe includes an upper and a sole fixed together, wherein the upper includes an inner lining and an outer surface; the upper is provided with the cushioning sheet and the webbing.

[0012] Compared to existing technologies, this invention provides cushioning pieces on the left and right sides of the inner surface or interior of the upper at the corresponding mold-fitting seam position of the webbing. When the shoe upper is fitted onto the shoe last, the cushioning pieces are pressed outwards, causing the outer surface of the upper at the corresponding position to move outwards. The outer surface of the upper at the corresponding position of the cushioning piece is basically flush with or slightly higher than the outer surface of the webbing, thereby ensuring that the webbing is not caught in the mold-fitting seam during mold fitting, preventing curling or damage. Attached Figure Description

[0013] Figure 1 It is a mold for molded shoes.

[0014] Figure 2 This is a schematic diagram of molded shoes placed in a mold.

[0015] Figure 3 This is a schematic diagram of the mold closing state.

[0016] Figure 4 It is a 3D diagram (top, near the sole) showing a cushioning plate on the inside of the upper and webbing on the outside.

[0017] Figure 5 This is a plan view of the upper from the inside (bottom side, closer to the sole).

[0018] Among them, 1 is the upper, 2 is the webbing, 3 is the buffer sheet, 4 is the gap, and 5 is the mold seam. Detailed Implementation

[0019] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1-5As shown, a molded shoe anti-pinch structure includes an upper 1, with a webbing 2 on the outer surface of the upper 1. When the mold is closed, the position of the webbing 2 covers the position of the mold-closing seam 5. Buffer sheets 3 are provided on the inner surface or interior of the upper 1, on the left side of the left edge and the right side of the right edge of the webbing 2 corresponding to the mold-closing seam 5. These buffer sheets protrude towards the outer surface of the upper 1 when the mold is pressed, ensuring that the outer surface of the webbing 2 corresponding to the mold-closing seam 5 is not higher than the outer surface of the upper 1 where the buffer sheet 3 is located. The position of the webbing 2 corresponding to the mold-closing seam 5 is generally located near the bottom of the webbing 2. The webbing 2 can be a ribbed webbing 2. In practice, the length and width of the webbing 2 are greater than the length and width of the mold-closing seam 5, and the length direction of the webbing 2 corresponds to the position of the mold-closing seam 5 near the bottom. When the mold is closed, the position of the webbing 2 corresponding to the mold-closing seam 5 contacts the mold. Because the webbing 2 is sewn onto the outer surface of the upper 1, its height at this point is higher than the height of other positions on the upper 1. In the mold-closed state, the bottom of the webbing 2, corresponding to the mold-closed seam 5, is easily caught, causing wrinkles, unevenness, or even damage to the bottom of the webbing 2 at this position after mold closure. This invention provides buffer sheets 3 on the left and right sides of the inner surface or interior of the upper 1 at the position corresponding to the mold-closed seam 5 of the webbing 2. When the upper is fitted onto the shoe last, the buffer sheets 3 are pressed outwards, causing the outer surface of the upper 1 at the corresponding position to move outwards. The outer surface of the upper 1 at the position corresponding to the buffer sheet 3 is basically flush with or slightly higher than the outer surface of the webbing 2, thus ensuring that the webbing 2 is not caught in the mold-closed seam 5 during mold closure, preventing curling or damage, and significantly reducing the webbing 2's catching rate. In this invention, the shape, size, thickness, and hardness of the buffer sheet 3 are set as needed. The material of the buffer sheet 3 can be elastic or non-elastic, as long as these parameters meet the function of preventing the webbing 2 from being caught. The buffer sheet 3 can be fixed to the upper 1 in various ways, such as by gluing or sewing.

[0021] Specifically, the buffer sheet 3 can be set on the inner surface or the bottom of the interior of the side surface 1, and its top height is not lower than the maximum height of the mold joint 5.

[0022] Furthermore, during mold closing, the outer surface of the webbing 2 corresponding to the mold closing seam 5 is flush with or nearly flush with the outer surface of the upper 1 where the buffer sheets 3 are located on the left and right sides. When flush, the outer surface of the shoe is smoother after molding, resulting in a better visual effect.

[0023] Preferably, the buffer sheet 3 is an elastic sheet capable of elastic deformation under mold closing pressure. Various materials can be used for the elastic sheet, such as low-cost EVA, as long as it can withstand the pressure and temperature during mold closing. The elastic sheet can elastically deform under mold closing pressure, thus expanding to form an outward convex support. During mold closing, the left and right edges of the webbing 2 are flush with the outer surface of the upper 1 where the elastic sheet is located on the corresponding side, thereby preventing the webbing 2 from being damaged. Using existing EVA scraps, the material cost per shoe increases by less than 0.02 yuan, achieving zero-cost efficiency improvement. Of course, other elastic materials can also be used. Non-elastic materials can also be used to make the buffer sheet 3, but edge processing is required; the two sides of the buffer sheet 3 need to be thin so that no marks are visible on the shoe surface. Using elastic materials eliminates the need for edge processing. Moreover, the elastic sheet can recover its deformation after mold closing without external pressure, preventing outward convexity and thus forming elastic dynamic support.

[0024] Preferably, gaps 4 are provided between the left edge of the webbing 2 corresponding to the mold-closing seam 5 and the left buffer piece 3, and between the right edge of the webbing 2 corresponding to the mold-closing seam 5 and the right buffer piece 3; the gaps 4 are within 1 mm; when the mold is closed, the gaps 4 form an overflow prevention groove. Preferably, the gaps 4 are 0.5 mm. After setting the gaps 4, when the mold is closed, the buffer piece 3 protrudes outward and is flush with the webbing 2 corresponding to the mold-closing seam 5, and the gap 4 between them forms a groove. After the mold is closed, when molten rubber is injected, rubber is also injected into the overflow prevention groove, thereby wrapping the left and right edges of the webbing 2 to form a sealing structure.

[0025] Furthermore, the length of the buffer sheet 3 covers the entire mold joint 5; the width of the buffer sheet 3 is 10 to 15 mm; and the thickness of the buffer sheet 3 is 0.8 to 1.5 mm. Here, "length" refers to the length in the height direction.

[0026] Preferably, the buffer sheet 3 is an EVA sheet with a density of 0.15-0.25 g / cm³ and a Shore hardness of 35 to 45. The width of the buffer sheet 3 is 2-3 mm wider than the width of the webbing 2. A gap 4 of 0.5 mm is provided between the left edge of the webbing 2 and the left buffer sheet 3 at the corresponding mold seam 5 position, and between the right edge of the webbing 2 and the right buffer sheet 3 at the corresponding mold seam 5 position. The buffer sheet 3 is adhered to the inner surface of the upper 1. It can also be fixed to the inner surface or interior of the upper 1 by other means. It is preferred to fix it to the inner surface for ease of operation.

[0027] Furthermore, the shoe upper includes an upper 1 and an lining, with the cushioning piece 3 fixedly disposed on the inner surface of the upper 1. The upper 1 and the lining are joined together in an existing manner, such as by stitching, bonding, or a combination of stitching and bonding, the only difference being that the cushioning piece 3 is disposed on the inner surface of the upper near the webbing 2. Of course, shoe uppers without an lining are also within the protection scope of this utility model.

[0028] A molded shoe with an anti-pinch structure is provided. The molded shoe includes an upper and a sole fixed together. The upper includes an inner lining and an outer surface 1 on the outer side of the shoe. The cushioning sheet 3 and the webbing 2 are provided on the outer surface 1.

[0029] In specific implementation, the manufacturing process includes the following steps: Step 1: Cut the EVA sheet with self-adhesive adhesive and then bevel it. Step 2: Attach the self-adhesive EVA sheet to the inner side of the upper surface 1 according to the positioning. Step 3: Sew the reinforcing webbing 2 along the edge of the EVA. Step 4: Mold closing operation, with a mold closing pressure ≥8Mpa during molding. In this utility model, under the mold closing pressure, the EVA buffer sheet 3 undergoes elastic deformation, forming an outward convex surface of 0.6-1.0mm, so that the edge of the webbing 2 forms a safe gap 4 (e.g., 0.1 to 0.3 mm) with the mold, thereby preventing the edge of the webbing 2 from being pinched by the gap. The elastic support of the EVA buffer sheet 3 forms a dynamic protective layer. During mold closing, the outward convex structure and the groove between the buffer sheet 3 and the webbing 2 guide the molten rubber to penetrate and wrap the edge of the webbing 2 to form a seal. Compared with the traditional process, after adopting the structure of this patent, the damage rate of the webbing 2 is reduced from 80% to less than 2.3%. The frequency of manual intervention in the mold is reduced from 100% to 0%. The bonding strength of the upper and foot panels increased from 85 N / cm to 112 N / cm. In a specific embodiment, 5000 pairs of hiking boots were produced using this process. The mold seam width 5 was 0.8 mm. 1.0 mm thick EVA with a Shore hardness of 40 was used. Results: The webbing 2 pinching rate decreased from 80% to 0%, saving 1.7 yuan in repair costs per pair of shoes.

[0030] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.

Claims

1. A molded shoe anti-pinch structure, comprising an upper surface of the shoe upper, wherein a webbing is provided on the outer surface of the upper surface; when the mold is closed, the position of the webbing covers the position of the mold closing seam; characterized in that: A buffer sheet is provided on the inner surface or inside of the upper, on the left side of the left edge and the right side of the right edge of the webbing located at the corresponding mold seam position. The buffer sheet protrudes towards the outer surface of the upper when the mold is pressed, so that the outer surface of the webbing at the corresponding mold seam position is not higher than the outer surface of the upper where the buffer sheet is located.

2. The molded shoe anti-pinch structure according to claim 1, characterized in that: When the mold is closed, the outer surface of the webbing at the mold closing seam is flush with or nearly flush with the outer surface of the side panel where the buffer sheet is located on the left and right sides.

3. The molded shoe anti-pinch structure according to claim 1, characterized in that: The buffer sheet is an elastic sheet capable of elastic deformation under mold closing pressure.

4. The molded shoe anti-pinch structure according to claim 1, characterized in that: A gap is provided between the left edge of the webbing and the left buffer piece at the mold closing position, and between the right edge of the webbing and the right buffer piece at the mold closing position; the gap is within 1 mm; an overflow prevention groove is formed at the gap position when the mold is closed.

5. The molded shoe anti-pinch structure according to claim 1, characterized in that: The length of the buffer sheet covers the entire mold joint; the width of the buffer sheet is 10 to 15 mm; and the thickness of the buffer sheet is 0.8 to 1.5 mm.

6. The molded shoe anti-pinch structure according to claim 5, characterized in that: The buffer sheet is an EVA sheet with a density of 0.15-0.25 g / cm³ and a Shore hardness of 35 to 45. The width of the buffer sheet is 2-3 mm wider than the width of the webbing. A gap of 0.5 mm is provided between the left edge of the webbing and the left buffer sheet at the mold seam position, and between the right edge of the webbing and the right buffer sheet at the mold seam position. The buffer sheet is adhered to the inner surface of the upper.

7. The molded shoe anti-pinch structure according to claim 1, characterized in that: The shoe upper includes an upper and an lining, and the cushioning piece is fixedly disposed on the inner surface of the upper.

8. A molded shoe, comprising an upper and a sole fixed together, the upper comprising an inner lining and an outer lining; characterized in that: The molded shoe anti-pinch structure according to any one of claims 1-7 is provided with the cushioning sheet and the webbing on the upper surface.

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