A polyurethane spray mold

Abstract

The utility model provides a kind of polyurethane spraying mould, it is related to shoemaking equipment and shoemaking process field, including sole module, the cavity designed according to the shape of sole is provided on sole module upper end, cavity is constituted by bottom surface and wall, the wall of continuous setting is connected with the outer periphery of bottom surface, the opening of cavity is arranged in the upper end surface of sole module, and spraying adhesion layer is arranged in the inner surface of wall. After testing, the shoe height model wall mould of the present mould can effectively solve the shoemaking work, solve the problem that spraying material is evenly adhered to hang wall, ensure that the processing technology of polyurethane material sole of spraying can be smoothly realized, and more comfortable, durable and beautiful sole is made.

Description

Technical Field

[0001] This utility model belongs to the field of shoe mold making, and in particular to a high-side-wall shoe mold for polyurethane spraying molding, specifically a polyurethane spraying mold. Background Technology

[0002] For many years, polyurethane materials have been widely used in the footwear industry, gaining market recognition for their lightweight, slip-resistant, and wear-resistant properties. Previously, foamed polyurethane was mainly produced by injection or casting, where it was injected into a mold to form a sole. The advantage of this type of outsole was its lightness, but the disadvantages included numerous air bubbles in the tread pattern, affecting the appearance. Furthermore, foamed polyurethane had a relatively low density, resulting in lower wear resistance and hardness. With the continuous development of polyurethane technology, sprayed polyurethane materials have been introduced to the market. Unlike traditional foamed polyurethane, sprayed polyurethane has a high density, a compact structure, is bubble-free, and offers optimized hardness and compressive strength. The manufacturing process of sprayed polyurethane material differs from that of foaming. It uses a spraying head to evenly spray the polyurethane into a mold to form a base plate. Then, foamed polyurethane is injected or poured onto this base plate to form a complete outsole. This process combines the advantages of lightweight foamed polyurethane with the solution to the defects of bubbles and patterns that have been found in traditional foamed polyurethane, greatly improving the appearance quality of the outsole and making it more perfect!

[0003] However, sprayed polyurethane materials have different requirements for shoe molds. Existing shoe mold materials are usually made of aluminum alloy, and the inner wall of the cavity can be sprayed with polytetrafluoroethylene (Teflon). The inner wall of the shoe mold sidewall is smooth and easy to demold. For the transmission of foamed polyurethane, it can improve production efficiency. However, for the new sprayed polyurethane, due to its own characteristics, it has stronger fluidity. For shoe molds with high outsole sidewalls, the sprayed material will flow down and cannot stick to the wall. In production, it was found that if the shoe mold sidewall is no higher than 10mm, the sprayed polyurethane can be processed normally. However, if the shoe mold sidewall is higher than 10mm, or even reaches more than 30mm, the problem of the material not sticking to the wall is particularly obvious. In some cases, the sprayed material cannot form a complete sole in the mold. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and proposes a polyurethane spraying mold that can meet the processing needs of polyurethane spraying.

[0005] A polyurethane spraying mold includes a shoe sole module. The upper end of the shoe sole module is provided with a cavity designed according to the shape of the shoe sole. The cavity is composed of a bottom surface and side walls. The outer periphery of the bottom surface is connected to the continuously arranged side walls. The opening of the cavity is located on the upper end surface of the shoe sole module. A spraying adhesion layer is provided on the inner surface of the side walls.

[0006] Moreover, the sprayed coating layer is made of copper or brass.

[0007] Furthermore, the inner surface of the side wall and the upper surface of the bottom surface are both provided with a continuous spray coating layer.

[0008] Furthermore, the height of the sidewall is not less than 10mm.

[0009] Moreover, the spray coating layer is made inside the cavity using a copper plating process.

[0010] Moreover, the spray coating layer is made of thin-walled copper material and is embedded in the cavity groove of the shoe sole module.

[0011] Moreover, the bottom module is made entirely of copper.

[0012] The advantages and positive effects of this invention are:

[0013] Tests have shown that this mold can effectively solve the shoe-making process of shoe high mold side wall molds, solve the problem of the sprayed material not adhering evenly to the wall, ensure that the processing technology of sprayed polyurethane material soles can be smoothly realized, and produce more comfortable, durable and beautiful soles. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of a mold according to an embodiment of the present invention.

[0016] Figure 3 yes Figure 2 BB-direction sectional view.

[0017] Figure 4 This is a schematic diagram of the structure of a mold according to another embodiment of the present invention.

[0018] Figure 5 yes Figure 3 Sectional view along the CC direction.

[0019] Figure 6 This is a schematic diagram showing the combination of the shoe sole module and the spraying machine.

[0020] Figure descriptions: 1. Spraying head; 11. Spray outlet; 2. Shoe sole module; 21. Side wall; 22. Bottom surface; 23. Cavity groove. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] A polyurethane spraying mold, see attached. Figure 1As shown, the shoe includes a sole module 2. The upper end of the sole module is provided with a cavity designed according to the shape of the sole. Polyurethane material is solidified and molded in the cavity of the sole module to form the sole. The cavity is composed of a bottom surface 22 and a side wall 21. The outer periphery of the bottom surface is connected with a continuous side wall to form a hollow cavity. The opening of the cavity is located on the upper end surface of the sole module. The side wall between the bottom surface of the cavity and the upper end surface of the sole module is connected by the side wall. In this embodiment, the height of the side wall is greater than 10mm. A spray coating layer is provided on the inner surface of the side wall. In this embodiment, the side wall is made of copper or brass material and the spray coating layer is formed by copper plating process.

[0023] The sprayed coating has a uniform and dense crystalline structure. Electroplating can create a low-porosity surface, reducing stress concentration points at the bonding interface and thus improving adhesion. The adhesion of the sprayed coating to the inner wall of the mold cavity is the result of both mechanical interlocking and chemical bonding. By optimizing substrate pretreatment, electroplating parameters, and post-treatment processes, adhesion requirements can be met, satisfying the long-term service needs of precision molds.

[0024] See Figure 6 As shown, the sole module 2 works in conjunction with the sprayer 1. The sprayer is movable, and the spray nozzle 11 of the sprayer head faces the bottom of the cavity and the outer perimeter wall, so that the sprayed polyurethane is fully sprayed onto the bottom of the cavity and the outer perimeter wall. The sprayer head can be a fully automatic sprayer or a semi-automatic handheld sprayer.

[0025] See appendix Figure 2 , 3 As shown, a spray coating layer is provided on the sidewalls and bottom. The spray coating layer can be made by copper plating or by thin-walled copper material. The spray coating layer is then embedded into the cavity groove 23 of the shoe sole module.

[0026] See appendix Figure 4 , 5 As shown, the sole module is made entirely of copper.

[0027] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A polyurethane spray mold characterized by: The sole module is provided with a cavity designed according to the shape of the sole at the upper end of the sole module, the cavity is composed of a bottom surface and a side wall, the outer periphery of the bottom surface is connected with the continuously arranged side wall, the opening of the cavity is arranged on the upper end surface of the sole module, and the inner surface of the side wall is provided with a sprayed adhesion layer.

2. The polyurethane spray mold of claim 1, wherein: The sprayed adhesion layer is made of red copper or brass material.

3. The polyurethane spray mold of claim 1, wherein: The inner surface of the side wall and the upper surface of the bottom surface are both provided with a continuous sprayed adhesion layer.

4. The polyurethane spray mold of claim 1, wherein: The height of the side wall is not less than 10 mm.

5. The polyurethane spray mold of claim 1, wherein: The sprayed adhesion layer is made in the cavity by a copper plating process.

6. The polyurethane spray mold of claim 1, wherein: The sprayed adhesion layer is made of thin-walled copper material and is embedded in the cavity groove of the sole module.

7. The polyurethane spray mold of claim 1, wherein: The bottom module is made of copper material as a whole.

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