Injection molding auxiliary tool for rubber shoes

Abstract

According to the injection molding auxiliary tool for the rubber shoes, a shoe tree is used for positioning a shoe body and comprises a positioning groove, and the positioning groove is used for containing the edge of a shoe sole so as to facilitate positioning; the shoe body comprises a shoe middle sole and an upper, and the shoe middle sole and the upper are integrated through injection molding materials. The toe cap is arranged at the front end of the shoe body and comprises a toe cap outer wrapping piece and a toe protection head, and the toe cap outer wrapping piece and the toe protection head are integrated through injection molding materials. The shaping sleeve is arranged on the auxiliary part, is used for shaping the toe cap and comprises a shaping cavity, and the shaping cavity is attached to the toe cap wrapping piece; the auxiliary part comprises a first toe cap cavity and a second toe cap cavity, the first toe cap cavity is attached to the toe cap outer wrapping piece, the first toe cap cavity and the second toe cap cavity are formed in the auxiliary part, the second toe cap cavity is attached to the shaping sleeve, and therefore the problem that a vamp is broken by clamping or a gap appears in the injection molding process is effectively solved; the defect that the injection molding material overflows to pollute the vamp is avoided, and the product quality is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of injection molding auxiliary tool structures for rubber shoes, and more specifically to an injection molding auxiliary tool for rubber shoes. Background Technology

[0002] With the advancement of modern science and technology, footwear manufacturing technology has been continuously innovated, and footwear products have made significant progress in terms of quality, production efficiency, and functionality. However, current footwear products still need improvement in terms of comfort, particularly in traditional safety shoes and snowboard boots, where some issues remain.

[0003] For example, in the production process of conventional injection molded shoes, soft uppers are prone to large deformation, which may cause the mold to clamp the upper and tear it. It may also cause gaps in the mold closing, resulting in overflow of injection plastic, which may spill into other areas of the upper and contaminate it, leading to substandard product quality.

[0004] In addition, the existing manufacturing process for safety shoes is complicated, requiring the installation of toe caps and the shaping of the upper. The upper needs to be removed twice, which can cause changes in the shoe cavity and make the wearer feel uncomfortable. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an injection molding auxiliary tool for rubber shoes. This tool includes a shoe last, shoe body, toe cap, molding sleeve, auxiliary components, and sole, wherein: The shoe last is used to position the shoe body and includes a positioning groove for accommodating the edge of the sole for positioning. The shoe body includes a midsole and an upper, with the midsole fused to the upper via injection molding. The toe box is located at the front of the shoe body and includes a toe cap and a toe guard, with the toe cap fused to the toe guard via injection molding. A shaping sleeve is mounted on an auxiliary component for shaping the toe box and includes a shaping cavity that fits into the toe cap. The auxiliary component includes a first toe cavity and a second toe cavity, with the first toe cavity fitting into the toe cap and the second toe cavity fitting into the shaping sleeve, and the first toe cavity being smaller than the second toe cavity. The sole is located within the positioning groove and includes a bottom and a side, with the bottom fused to the side via injection molding.

[0006] The inner cavity of the shaping sleeve has the same curvature as the outer toe piece, and the shape fits the sleeve perfectly. The shaping sleeve and the auxiliary parts are made of mold steel. The first toe cavity and the second toe cavity are located at both ends of the auxiliary parts. The bottom of the sole is provided with an injection molding process hole, and an injection molding connection fixing pin is provided on the injection molding process hole to ensure the integrity of the molding process.

[0007] The auxiliary component also includes an air extraction hole structure, which communicates with the molding cavity and is used to extract the foaming gas in the closed cavity during the injection molding process to improve the injection molding quality; the outer surface of the molding sleeve is provided with a textured groove or textured protrusion structure to form graphic patterns on the side of the sole and the toe of the shoe, adding design elements.

[0008] The upper flange and the closed flange of the shaping sleeve extend toward the surface of the shoe upper and adapt to the contour curve of the shoe upper surface, forming a sealed and fitted structural design with the shoe upper surface. The upper flange and the closed flange are designed with high precision so that the gap between the shaping cavity and the shoe upper surface is controlled within 0.1 mm, effectively controlling the overflow of molten liquid and avoiding the generation of a large amount of shoe sole flash.

[0009] The beneficial effects of the injection molding auxiliary tool for rubber shoes of the present invention are as follows: Compared with the prior art, the present invention provides an injection molding auxiliary tool for rubber shoes, which has the following beneficial effects: 1. By setting a first toe cavity and a second toe cavity on the auxiliary part, and making the second toe cavity fit with the shaping sleeve, the problem of the shoe upper being pinched or gaps appearing during the injection molding process is effectively prevented, the defect of injection plastic overflowing and contaminating the shoe upper is avoided, and the product quality is significantly improved. 2. The inner cavity of the shaping sleeve of the present invention has the same curvature as the toe of the shoe and fits the shape perfectly, which effectively solves the problem of the cumbersome manufacturing process of traditional safety shoes and the need for the upper to be removed twice, thus simplifying the production process and improving production efficiency; 3. Through the combined design of auxiliary parts and shaping sleeves, the toe of the rubber shoes will not be deformed during the secondary glue injection, effectively controlling the deformation of the shoe upper, maintaining the smoothness of the inside of the shoe, and improving wearing comfort; 4. The first toe cavity and the second toe cavity of the present invention are distributed at both ends of the auxiliary component, and the design of the first toe cavity being smaller than the second toe cavity further enhances the fit between the shaping sleeve and the toe, and improves the molding quality and service life of the shoe; 5. The shaping sleeve and auxiliary parts of the present invention are made of mold steel, which has good wear resistance and corrosion resistance, can be used for a long time, reduces the replacement frequency, and lowers production costs. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0011] Figure 1 This is a schematic diagram of the structure of an injection molding auxiliary tool for rubber shoes according to the present invention.

[0012] Figure 2 This is a three-dimensional structural diagram of an injection molding auxiliary tool for rubber shoes according to the present invention.

[0013] Figure 3 This is a schematic diagram showing the positional relationship between the shoe body 2 and the auxiliary component 5.

[0014] Figure 4 This is a schematic diagram of auxiliary component 5.

[0015] In the picture: 1. Hat body; 2. Fixing strap; 3. Fixing strap channel; 4. Folded brim; 6. Hat brim. Detailed Implementation Example 1:

[0016] This embodiment provides an injection molding auxiliary tool for rubber shoes, combined with Figure 1-4 The shoe includes a last 1, a shoe body 2, a toe cap 3, a shaping sleeve 4, auxiliary components 5, and a sole 6. The last 1 is used to position the shoe body 2 and includes a positioning groove to accommodate the edge of the sole 6 for positioning. The shoe body 2 includes a midsole and an upper, with the midsole fused to the upper via injection molding. The toe cap 3 is located at the front of the shoe body 2 and includes a toe cap and a toe protection piece, with the toe cap fused to the toe protection piece via injection molding. The shaping sleeve 4 is mounted on the auxiliary component 5 and is used to shape the toe cap 3, including a shaping cavity that fits into the toe cap. The auxiliary component 5 includes a first toe cavity 51 and a second toe cavity 52. ​​The first toe cavity 51 fits into the toe cap, and the second toe cavity 52 fits into the shaping sleeve 4, with the first toe cavity 51 being smaller than the second toe cavity 52. ​​The sole 6 is located within the positioning groove and includes a bottom and sides, with the bottom fused to the sides via injection molding.

[0017] The inner cavity of the shaping sleeve 4 has the same curvature as the outer toe cap, and the shape fits perfectly. The shaping sleeve 4 and the auxiliary component 5 are made of mold steel. The first toe cavity 51 and the second toe cavity 52 are located at both ends of the auxiliary component 5. The bottom of the sole 6 is provided with an injection molding process hole, and an injection molding connection fixing pin is provided on the injection molding process hole to ensure the integrity of the molding process.

[0018] The auxiliary component 5 also includes an air extraction hole structure, which communicates with the molding cavity to extract the foaming gas in the closed cavity during the injection molding process, thereby improving the injection molding quality. The outer surface of the molding sleeve 4 is provided with a textured groove or textured protrusion structure to form graphic patterns on the sides of the sole 6 and the toe, adding design elements.

[0019] The upper flange and the closed flange of the shaping sleeve 4 extend toward the surface of the shoe upper and adapt to the contour curve of the shoe upper surface, forming a sealed and fitted structural design with the shoe upper surface. Through the precision design of the mold, the gap between the shaping cavity and the shoe upper surface is controlled within 0.1 mm, effectively controlling the overflow of molten liquid and avoiding the generation of a large amount of shoe sole flash. Example 2:

[0020] In this embodiment, the inner diameter of the shaping sleeve 4 is 30 mm and the length is 50 mm. The diameter of the first toe cavity 51 is 25 mm and the length is 40 mm. The diameter of the second toe cavity 52 is 35 mm and the length is 45 mm. The shaping sleeve 4 and the auxiliary component 5 are made of Q235B steel. The gap between the first toe cavity 51 and the outer toe cover is 0.5 mm, and the gap between the second toe cavity 52 and the shaping sleeve 4 is 1.0 mm. Example 3:

[0021] In this embodiment, the shoe body 2 is size 42, the sole 6 is 260 mm long and 120 mm wide. The toe box 3 is 80 mm high and 60 mm wide. The outer surface of the molding sleeve 4 has a herringbone pattern with a depth of 0.5 mm. The diameter of the injection molding hole is 3 mm, and the diameter of the fixing pin is 2 mm.

[0022] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. An injection molding auxiliary tool for rubber shoes, comprising a shoe last (1), a shoe body (2), a shoe toe (3), a shaping sleeve (4), auxiliary parts (5), and a shoe sole (6), characterized in that: The auxiliary component (5) is provided with a first toe cavity (51) and a second toe cavity (52); the second toe cavity (52) is fitted with the shaping sleeve (4), and the first toe cavity (51) is fitted with the toe (3); the first toe cavity (51) is smaller than the second toe cavity (52).

2. The injection molding auxiliary tool for rubber shoes according to claim 1, characterized in that: The inner cavity of the shaping sleeve (4) has the same curvature as the toe (3) and the shape fits perfectly.

3. The injection molding auxiliary tool for rubber shoes according to claim 1, characterized in that: The shaping sleeve (4) and auxiliary parts (5) are made of mold steel.

4. The injection molding auxiliary tool for rubber shoes according to claim 1, characterized in that: The first toe cavity (51) and the second toe cavity (52) are located at both ends of the auxiliary component (5).

5. The injection molding auxiliary tool for rubber shoes according to claim 1, characterized in that: The bottom of the shoe sole (6) is provided with injection molding process holes.

6. The injection molding auxiliary tool for rubber shoes according to claim 5, characterized in that: The injection molding process hole is connected and fixed with an injection molding pin.

7. The injection molding auxiliary tool for rubber shoes according to claim 1, characterized in that: The auxiliary component (5) also includes an air extraction hole structure, which is connected to the molding cavity and is used to extract the foaming gas in the closed cavity during the injection molding process to improve the injection molding quality.

Images