Sole manufacturing method

Abstract

The invention discloses a sole manufacturing method which comprises the following steps: S1, pouring a high-density polyurethane solution into a forming mold, and cooling to form a wear-resistant layer; s2, the cooled wear-resistant layer is put into a foaming mold, then low-density polyurethane forming a foaming layer is poured into the wear-resistant layer, and foaming layer melt completely covers one face of the wear-resistant layer; and S3, covering an upper mold cover of the foaming mold, then heating the wear-resistant layer and the foaming layer at the same time, so that the foaming layer and one surface of the wear-resistant layer are fully fused, and manufacturing of the shoe sole is completed after the foaming layer and one surface of the wear-resistant layer are cooled. On the basis, the wear-resistant layer and the foaming layer are both made of polyurethane, so that the wear-resistant layer and the foaming layer are consistent in melting point and molecular structure, the wear-resistant layer and the foaming layer can be better fused into an integrated structure, the connection strength of the wear-resistant layer and the foaming layer is improved, and the degumming phenomenon is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sole production, in particular to a method for manufacturing a sole. Background Art

[0002] like Figure 1 As shown, the existing sole includes a foam layer 1 and a wear-resistant layer 2, and then the wear-resistant layer 2 is glued to the foam layer 1 by glue to complete the production of the sole; however, it is well known that the wear-resistant layer 2 and the foam layer 1 are easily debonded by glue; in particular, when the wear-resistant layer 2 made of high-density polyurethane and the foam layer 1 made of low-density polyurethane are compounded, in order to avoid the wear-resistant layer 2 and the foam layer 1 from fusing with each other in the foaming mold, it is necessary to use a groove 3 around the foam layer 1 to separate the wear-resistant layer 2 and the foam layer 1. The existence of the groove 3 can easily cause stones to get stuck on the sole and damage the foam layer 1. Summary of the invention

[0003] The purpose of the present invention is to provide a method for manufacturing a sole to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a method for making a sole, characterized in that it comprises the following steps: S1: pouring a high-density polyurethane melt into a molding mold and waiting for it to cool to form a wear-resistant layer; S2: placing the cooled wear-resistant layer into a foaming mold, and then pouring a low-density polyurethane constituting the foaming layer onto the wear-resistant layer, wherein the melt of the foaming layer completely covers one side of the wear-resistant layer; S3: covering the upper mold cover of the foaming mold, and then heating the wear-resistant layer and the foaming layer at the same time, so that the foaming layer and the facing surfaces of the wear-resistant layer are fully fused, and the sole is completed after it is cooled.

[0005] As a preferred technical solution of the present invention: after the wear-resistant layer is formed in the forming mold in step S1, both sides of the wear-resistant layer are smooth.

[0006] To achieve the above object, the present invention also provides a technical solution: a method for making a sole, comprising the following steps: S1: selecting a molding mold; wherein the molding mold comprises a bottom plate and a cover plate; a molding cavity is provided on the bottom plate, and a pressing block having the same shape as the molding cavity is also provided on the cover plate, and the size of the pressing block is smaller than the size of the molding cavity; S2: pouring a high-density polyurethane solution into the molding cavity, and then covering it with a cover plate. When the pressing block enters the molding cavity, the high-density polyurethane fills the gap between the pressing block and the molding cavity to form a wear-resistant layer. After cooling, a retaining edge is formed on the outer edge of the wear-resistant layer. S3: placing the cooled wear-resistant layer into a foaming mold, and then pouring the low-density polyurethane constituting the foaming layer onto the wear-resistant layer, wherein the melt of the foaming layer completely covers one side of the wear-resistant layer; S4: Cover the upper mold cover of the foaming mold, and then heat the wear-resistant layer and the foaming layer at the same time, so that the foaming layer and the facing surface of the wear-resistant layer are fully fused, and the sole is completed after cooling.

[0007] Further: it also includes step S5: attaching the cloth to the pressing block; and then covering it with a cover plate. When the pressing block enters the molding cavity, the cloth and the high-density polyurethane are fully integrated to increase the height of the wear-resistant layer retaining edge.

[0008] Further: the fabric in step S5 is liquid permeable.

[0009] Further: in step S5, the fabric is non-woven fabric.

[0010] Furthermore: the high-density polyurethane in step S2 is transparent high-density polyurethane, and the fabric in step S2 is printed with a pattern for improving the aesthetics of the sole.

[0011] By adopting the above technical scheme, the beneficial effects of the present invention are: 1. Since the wear-resistant layer and the foaming layer are both polyurethane, the melting point and molecular structure of the wear-resistant layer and the foaming layer are consistent, so that the wear-resistant layer and the foaming layer can be better fused into an integrated structure to improve the connection strength between the wear-resistant layer and the foaming layer, and completely solve the problem of easy degumming of existing soles.

[0012] 2. Since the wear-resistant layer and the foaming layer are directly fused together, firstly, no glue is needed in the process of making the sole, thereby reducing the investment in production cost; secondly, the above method is adopted, i.e., the wear-resistant layer is first formed and then the wear-resistant layer and the foaming layer are placed in a foaming mold for synchronous forming, so that the wear-resistant layer can completely cover the foaming layer, so that the periphery of the sole will not cause the problem of stones being stuck in the sole due to the existence of the groove, thereby solving the problem of the sole being broken by stones; thirdly, the wear-resistant layer completely covers the foaming layer, and the wear-resistant layer can be used to protect the foaming layer to prevent the foaming layer from being worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of a sole in the prior art; Figure 2 Schematic diagram of the cross-sectional structure of a sole according to a first embodiment of the present invention; Figure 3 It is a schematic diagram of the closed molding die in the second embodiment of the present invention; Figure 4 It is a schematic diagram of the opening of the molding die in the second embodiment of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the sole of the second embodiment of the present invention.

[0014] In the figure: 1, foaming layer; 2, wear-resistant layer; 3, groove; 4, bottom plate; 5, cover plate; 6, molding cavity; 7, pressing block; 8, fixing column. DETAILED DESCRIPTION

[0015] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0016] Implementation method 1: Please refer to Figure 2 , the embodiment provided by the present invention: a method for making a sole, comprising the following steps: S1: pouring a high-density polyurethane melt into a molding mold and waiting for it to cool to form a wear-resistant layer 2; S2: placing the cooled wear-resistant layer 2 into a foaming mold, and then pouring a low-density polyurethane constituting the foaming layer 1 onto the wear-resistant layer 2, wherein the melt of the foaming layer 1 completely covers one surface of the wear-resistant layer 2; S3: covering the upper mold cover of the foaming mold, and then heating the wear-resistant layer 2 and the foaming layer 1 at the same time, so that the facing surfaces of the foaming layer 1 and the wear-resistant layer 2 are fully fused, and the sole is completed after it is cooled.

[0017] In summary, since the wear-resistant layer 2 and the foaming layer 1 are both polyurethane, the wear-resistant layer 2 and the foaming layer 1 have the same melting point and molecular structure, so the wear-resistant layer 2 and the foaming layer can be better fused into an integrated structure to improve the connection strength between the wear-resistant layer and the foaming layer, and completely solve the problem of easy degumming of the existing soles; In particular, since the wear-resistant layer 2 is directly fused with the foaming layer 1, firstly, no glue is needed in the process of making the sole, thereby reducing the investment in production cost; secondly, the above method is adopted, i.e., the wear-resistant layer 2 is first formed and then the wear-resistant layer 2 and the foaming layer 1 are placed in the foaming mold for synchronous forming, so that the wear-resistant layer 2 can completely cover the foaming layer 1, so that the periphery of the sole will not cause the problem of stones being stuck in the sole due to the existence of the groove, thereby solving the problem of the sole being broken by stones; thirdly, the wear-resistant layer 2 completely covers the foaming layer 1, and the wear-resistant layer 2 can be used to protect the foaming layer 1 to prevent the foaming layer 1 from being worn.

[0018] Furthermore, after the wear-resistant layer is formed in the forming mold in step S1, one side of the wear-resistant layer 2 is smooth, and the other side of the wear-resistant layer 2 has anti-slip textures. That is, the flat surface of the wear-resistant layer 2 without any texture is fully fused with the foaming layer 1.

[0019] Among them, the structure of the molding mold is: a molding cavity for molding the wear-resistant layer 2 is opened on a plate body, so that the molding mold is simple to process; in addition, the molding cavity is consistent with the bottom surface structure of the foaming mold, so that the wear-resistant layer 2 and the foaming layer 1 can completely overlap, and there is no protruding part around the foaming layer 1.

[0020] In summary, the sole is made by using two pairs of molds, so the wear-resistant layer 2 and the foaming layer 1 can be reliably connected, and no glue is needed, so the production of the sole is more environmentally friendly; Since the wear-resistant layer 2 is processed separately, the wear-resistant layer 2 and the foaming layer 1 are clearly layered when the sole is formed, which completely eliminates the phenomenon of material leakage and glue overflow, thereby ensuring the aesthetics of the sole; secondly, the wear-resistant layer 2 is uniform as a whole, the overall thickness of the wear-resistant layer 2 is uniform, and the main material of the wear-resistant layer 2 is uniform, thereby improving the wear resistance of the sole.

[0021] Implementation Method 2: Please refer to Figure 3 , Figure 4 , Figure 5 The embodiment of the present invention provides a method for making a sole, characterized in that it includes the following steps: S1: selecting a molding mold; wherein the molding mold includes a bottom plate 4 and a cover plate 5; the bottom plate 4 is provided with a molding cavity 6, and the cover plate 5 is also provided with a pressing block 7 that is consistent with the shape of the molding cavity 6, and the size of the pressing block 7 is smaller than the size of the molding cavity 6; S2: pouring a high-density polyurethane solution into the molding cavity 6, and then covering the cover plate 5, when the pressing block 7 enters the molding cavity 6, the high-density polyurethane The ester fills the gap between the pressing block 7 and the molding cavity 6 to form a wear-resistant layer 2, and a rib is formed on the outer edge of the wear-resistant layer 2 after cooling; S3: the cooled wear-resistant layer 2 is placed in a foaming mold, and then the low-density polyurethane constituting the foaming layer 1 is poured onto the wear-resistant layer 2, wherein the molten metal of the foaming layer 1 completely covers one side of the wear-resistant layer 2; S4: cover the upper mold cover of the foaming mold, and then heat the wear-resistant layer 2 and the foaming layer 1 at the same time, so that the facing surfaces of the foaming layer 1 and the wear-resistant layer 2 are fully fused, and the production of the sole is completed after it is cooled.

[0022] In summary, the sole made by the second embodiment has the effect of the sole in the first embodiment, and also has the advantages that the edge of the sole is higher without increasing the thickness of the sole, and can be wrapped around the outside of the foaming layer 1 to further solve the problem of the sole being broken by stones; thirdly, the wear-resistant layer 2 completely covers the foaming layer 1, and the wear-resistant layer 2 can be used to protect the foaming layer 1 to prevent the foaming layer 1 from being worn. On the basis of the above scheme, it also includes step S5: attaching the cloth to the pressing block; then covering the cover plate, when the pressing block enters the molding cavity, the cloth and the high-density polyurethane are fully integrated to increase the height of the retaining edge of the wear-resistant layer 2. Among them, step 5 is completed before the high-density polyurethane is poured into the molding cavity. In addition, in order to improve the stability of the cloth attached to the pressing block 7, cylindrical pins 8 are also provided around the pressing block 7, and the cloth is fixed to the pressing block 7 by the cylindrical pins 8.

[0023] Since foaming has low density, low cost, high elasticity and high softness, it is comfortable to wear; but it is easy to hydrolyze, break and is not wear-resistant. Therefore, the height of the rib of the wear-resistant layer 2 is increased by adding fabric. Firstly, it is convenient for the rib to be formed on the side of the wear-resistant layer 2; secondly, the fabric can be used to enhance the wall climbing height of the rib; thirdly, the higher the wall climbing height, the more the foaming layer is wrapped, and the stronger the protection ability of the foaming layer 1 is.

[0024] Specifically, the liquid-permeable fabric in step S5 is non-woven fabric. The use of non-woven fabric can not only play the role of reinforcing ribs, but also increase the height of the sole climbing the wall. In particular, the non-woven fabric is easy to print, and the high-density polyurethane can be fully integrated with the non-woven fabric, which can also improve the structural strength of the wear-resistant layer 2.

[0025] In addition, the high-density polyurethane in step S2 is transparent high-density polyurethane, and the pattern for improving the aesthetics of the sole is printed on the cloth in step S5. Therefore, by printing on the cloth, the texture and aesthetics of the sole are improved.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A method for making a sole, characterized in that: The method comprises the following steps: S1: pouring a high-density polyurethane melt into a molding mold and waiting for the melt to cool to form a wear-resistant layer (2); S2: placing the cooled wear-resistant layer (2) into a foaming mold, and then pouring the low-density polyurethane constituting the foaming layer (1) onto the wear-resistant layer (2), wherein the molten metal of the foaming layer (1) completely covers one surface of the wear-resistant layer (2); S3: Covering the upper mold cover of the foaming mold, and then heating the wear-resistant layer (2) and the foaming layer (1) at the same time, so that the facing surfaces of the foaming layer (1) and the wear-resistant layer (2) are fully fused, and after cooling, the production of the sole is completed.

2. The method for making a sole according to claim 1, characterized in that: After the wear-resistant layer is formed in the forming mold in step S1, one side of the wear-resistant layer (2) is a smooth surface, and the other side of the wear-resistant layer (2) has anti-slip patterns.

3. The method for making a sole according to claim 2, characterized in that: The molding cavity of the molding mold is consistent with the bottom surface structure of the foaming mold.

4. A method for making a sole, characterized in that: The method comprises the following steps: S1: selecting a molding die; wherein the molding die comprises a bottom plate and a cover plate; the bottom plate is provided with a molding cavity, the cover plate is further provided with a pressing block having the same shape as the molding cavity, and the size of the pressing block is smaller than the size of the molding cavity; S2: pouring a high-density polyurethane solution into the molding cavity, and then covering it with a cover plate. When the pressing block enters the molding cavity, the high-density polyurethane fills the gap between the pressing block and the molding cavity to form a wear-resistant layer (2). After cooling, a retaining edge is formed on the outer edge of the wear-resistant layer (2); S3: placing the cooled wear-resistant layer (2) into a foaming mold, and then pouring the low-density polyurethane constituting the foaming layer (1) onto the wear-resistant layer (2), wherein the molten metal of the foaming layer (1) completely covers one surface of the wear-resistant layer (2); S4: Covering the upper mold cover of the foaming mold, and then heating the wear-resistant layer (2) and the foaming layer (1) at the same time, so that the facing surfaces of the foaming layer (1) and the wear-resistant layer (2) are fully fused, and after cooling, the production of the sole is completed.

5. The method for making a sole according to claim 4, characterized in that: The method further comprises step S5: laminating the cloth onto the pressing block; and then covering the pressing block with a cover plate, so that when the pressing block enters the molding cavity, the cloth and the high-density polyurethane are fully integrated to increase the height of the retaining edge of the wear-resistant layer (2).

6. The method for making a sole according to claim 5, characterized in that: The fabric in step S5 has liquid permeability.

7. A method for manufacturing a sole according to claim 6, characterized in that: In step S5, the fabric is non-woven fabric.

8. The method for making a sole according to claim 7, characterized in that: The high-density polyurethane in step S2 is transparent high-density polyurethane, and the fabric in step S2 is printed with a pattern for improving the aesthetics of the sole.

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