TWI685309B - Sole structure and method of manufacturing the same - Google Patents

Abstract

A sole structure includes an outer sole and a recessed groove on the outer sole. The recessed groove defines a foot main portion and a peripheral decorating portion. The recessed groove is formed between the foot main portion and the peripheral decorating portion. The peripheral decorating portion has a larger surface roughness than the foot main portion.

Description

Sole structure and sole forming method

The invention relates to a shoe sole structure and a shoe sole forming method, in particular to a shoe sole forming method that does not need to roughen the surface of the shoe sole and a shoe sole structure made by the shoe sole forming method.

One method of manufacturing the sole is to inject the foam material into the sole mold by injection molding. After the foam material cools, the sole with light weight, wear resistance and impact resistance is obtained.

Due to the difference in thickness of the sole at different positions, the surface shape of the sole in each area after the cooling of the foam material is different. Further, for the thinner area of the sole, the cooling rate of the foam material is faster, so the surface of the cooled sole is rougher. In contrast, the thicker area of the shoe sole has a slower cooling rate, so the foam material can expand for a longer cooling time, making the surface of the cooled sole smoother.

Generally speaking, the soles of casual shoes usually require a rough surface to increase the visual texture and aesthetics. However, because the surface of the molded sole is smoother in the thicker area, the industry also needs to perform secondary processing on the surface of the thicker area to rub off the skin to reveal the foamy material with a rough texture inside. The secondary processing of the shoe sole leads to an increase in manufacturing costs and an increase in manufacturing time. Therefore, how to ensure that the surface of the sole is rough and reduce or omit the processing and grinding is one of the problems to be solved at present.

In view of the above problems, the present invention discloses a shoe sole structure, a shoe sole forming mold and a shoe sole forming method, which are helpful to solve the problem that the shoe sole surface needs to be roughened during the conventional shoe sole manufacturing process.

The sole structure disclosed by the invention has a concave groove. The recessed groove defines the sole structure connected with a tread main body part and a modeling peripheral part. The concave groove is interposed between the tread main body part and the molding peripheral part, and the surface roughness of the molding peripheral part is larger than the surface roughness of the tread main body part.

The shoe sole forming mold disclosed by the present invention includes a module and an annular convex rib. The module has a molding cavity. The annular convex rib is connected to the mold and is located in the molding cavity, and the distance between the annular convex rib and an inner side wall surface of the molding cavity is 2 cm to 3 cm.

The shoe sole forming method disclosed by the present invention further includes: providing the aforementioned shoe sole forming mold; injecting a heated foam material; and cooling the foam material to obtain a sole structure. The sole structure has a concave groove. The recessed groove defines the sole structure connected with a tread main body part and a modeling peripheral part. The concave groove is interposed between the tread main body part and the molding peripheral part, and the surface roughness of the molding peripheral part is larger than the surface roughness of the tread main body part.

According to the shoe sole structure, shoe sole forming mold and shoe sole forming method disclosed by the present invention, ribs are provided in the shoe sole forming mold, so that the foam material injected into the shoe sole forming mold has grooves matching the shape of the ribs after being molded, and thus foams After the material is cooled, a sole structure with a concave groove can be obtained, wherein the concave groove divides the sole structure into a tread main body part and a modeling peripheral part. When the foam material cools, the cooling rate of the foam material constituting the peripheral part of the molding is greater than the cooling rate of the foam material constituting the main body part of the tread, so it can be ensured that the surface of the peripheral part of the molding has a rough texture. The peripheral part of the styling with a rough texture is exposed to the outside, and the peripheral part of the styling shields the tread main body part with a smooth texture in the horizontal direction of the sole structure. In this way, the sole structure does not need to be secondarily processed to roughen the surface (no roughening is required), it can have a good texture and aesthetics, and help reduce manufacturing costs.

The above description of the disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

1. 1a‧‧‧sole structure

10, 10a‧‧‧recessed groove

11a‧‧‧thick part

101‧‧‧ opening

110‧‧‧The main part of the ground

120‧‧‧Surrounding part

121‧‧‧Outside

122‧‧‧Outer edge

123‧‧‧Inner edge

20‧‧‧Shoe tread

30‧‧‧Top

2‧‧‧Shoe sole mould

21‧‧‧Module

22‧‧‧Annular convex rib

210‧‧‧Forming cavity

211‧‧‧Inner wall surface

220‧‧‧Injection port

D1, D2‧‧‧Distance

D3‧‧‧ Separation distance

A‧‧‧Center

FIG. 1 is a schematic perspective view of a shoe with a sole structure according to a first embodiment of the present invention.

FIG. 2 is a schematic bottom view of the sole structure of FIG. 1.

FIG. 3 is a schematic cross-sectional view of the sole structure of FIG. 2 along the cutting line 3-3.

FIG. 4 is a schematic cross-sectional view of the sole structure of FIG. 2 along the cutting line 4-4.

FIG. 5 is a perspective schematic view of a shoe sole forming mold for manufacturing the shoe sole structure of FIG. 1.

6 is a schematic perspective view of a sole structure according to a second embodiment of the invention.

7 is a schematic bottom view of the sole structure of FIG. 6.

The following describes in detail the detailed features and advantages of the present invention in the embodiments. The content is sufficient for any person skilled in the relevant art to understand and implement the technical content of the present invention, and according to the contents disclosed in this specification, the scope of patent application and the drawings Anyone skilled in the relevant art can easily understand the purpose and advantages of the present invention. The following examples further illustrate the views of the present invention in detail, but do not limit the scope of the present invention in any way.

An embodiment of the present invention provides a sole structure having a recessed groove. The recessed groove defines the sole structure connected with a tread main body part and a modeling peripheral part. The concave groove is interposed between the tread main body part and the molding peripheral part, and the surface roughness of the molding peripheral part is larger than the surface roughness of the tread main body part.

Please refer to Figures 1 to 2 at the same time. FIG. 1 is a schematic perspective view of a shoe with a sole structure according to a first embodiment of the present invention. FIG. 2 is a schematic bottom view of the sole structure of FIG. 1. In this embodiment, the shoe includes a sole structure 1 and the sole structure 1 has a recessed groove 10. The concave groove 10 defines a sole body portion 110 and a molding peripheral portion 120 connected to the sole structure 1, and the concave groove 10 is interposed between the tread body portion 110 and the molding peripheral portion 120. The surface roughness of the modeling peripheral portion 120 is greater than the surface roughness of the tread body portion 110. Here, the surface roughness may refer to arithmetic average roughness, ten-point average roughness, Minimum square sum roughness or maximum height roughness. Since the surface roughness of the modeling peripheral portion 120 is relatively large, an outer side 121 of the modeling peripheral portion 120 will have a rough texture.

According to an embodiment of the invention, the sole structure has a shoe tread, and the recessed groove is located on the shoe tread. As shown in FIG. 2, the sole structure 1 has a shoe tread 20 and a concave groove 10 on the shoe tread 20. The shoe tread 20 extends to the tread body portion 110 and the modeling peripheral portion 120.

According to an embodiment of the invention, the recessed groove is ring-shaped. As shown in FIG. 2, the annular recessed groove 10 defines a tread body portion 110 located in the middle portion of the sole structure 1 and a molded peripheral portion 120 surrounding the tread body portion 110.

According to an embodiment of the invention, the sole structure is a foam material. The foamed material is, for example but not limited to, vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU) or thermoplastic rubber (TPR). It may be considered to add other additives to the foam to change the rheological behavior, density, mechanical properties, etc., so that the modeling peripheral portion 120 of the sole structure 1 has better structural strength and maintains the durability of the sole structure 1.

According to an embodiment of the invention, an outer edge of the peripheral portion of the molding is relative to the tread main body portion, and the recessed groove is adjacent to the outer edge. Please refer to Figure 3 and Figure 4 together. FIG. 3 is a schematic cross-sectional view of the sole structure of FIG. 2 along the cutting line 3-3. FIG. 4 is a schematic cross-sectional view of the sole structure of FIG. 2 along the cutting line 4-4. The molding peripheral portion 120 has an outer edge 122 and an inner edge 123 opposite to each other, wherein the outer edge 122 is farther away from the recessed groove 10 and the inner edge 123 is adjacent to the recessed groove 10. As shown in FIGS. 3 and 4, the recessed groove 10 is adjacent to the outer edge 122, which means that the recessed groove 10 and the outer edge 122 of the molded peripheral portion 120 are viewed from any cross section or longitudinal section of the sole structure 1. The distance D1 is smaller than the distance D2 between the recessed groove 10 and the center of the tread body portion 110. The opening 101 of the concave groove 10 extends from the shoe tread 20 toward a top surface 30 of the sole structure 1.

According to an embodiment of the present invention, the volume of the peripheral portion of the modeling is smaller than the volume of the main body portion of the tread. As shown in FIGS. 1 and 2, the volume of the modeling peripheral portion 120 is smaller than the volume of the tread body portion 110, and the tread body portion 110 has most of the shoe tread 20.

An embodiment of the present invention provides a shoe sole forming mold including a module and an annular rib. Please refer to FIG. 5, which is a perspective schematic view of a sole forming mold for manufacturing the sole structure of FIG. 1. In this embodiment, the shoe sole forming mold 2 includes a module 21 and an annular rib 22. The mold 21 has a molding cavity 210 and a filling port 220 connected to each other. The annular rib 22 is connected to the mold 21, and the annular rib 22 is located in the forming cavity 210.

Hereinafter, an embodiment of the present invention provides a shoe sole molding method.

First, a heated foam material is injected into the molding cavity 210 from the injection port 220 of the sole molding mold 2. In this embodiment, the foam material is injected into the molding cavity 210 by injection molding. The sole forming mold 2 may be selectively pressed to increase the forming yield. Next, the foam material is cooled to obtain the sole structure 1 shown in FIG. 2.

An annular rib 22 is provided in the sole forming mold 2 so that the foam material injected into the sole forming mold 2 is molded to have a groove matching the shape of the annular rib 22. Finally, after demolding, the sole structure 1 with the concave groove 10 on the tread surface 20 is obtained.

According to an embodiment of the present invention, the distance between the concave groove and the outer edge of the peripheral portion of the molding is 2 centimeters (mm) to 3 centimeters. As shown in FIG. 2, the distance D1 between the recessed groove 10 and the outer edge 122 has an appropriate size to balance the surface roughness and the mechanical strength. If the distance D1 is greater than 3 cm, the cooling rate of the foam material constituting the modeling peripheral portion 120 is too slow due to the overall volume of the modeling peripheral portion 120 is too large, resulting in a lack of rough texture on the surface of the modeling peripheral portion 120. If the distance D1 is less than 2 cm, the peripheral part 120 of the styling may be easily worn due to lack of sufficient mechanical strength, resulting in the service life of the sole structure 1 being too short.

In addition, as shown in FIG. 5, corresponding to the thickness of the molding peripheral portion 120 between the recessed groove 10 and the outer edge 122, the interval between the annular rib 22 in the sole molding mold 2 and an inner side wall surface 211 of the molding cavity 210 The distance D3 is 2 cm to 3 cm.

In the first embodiment, the concave groove of the sole structure is ring-shaped, but the invention is not limited thereto. Please refer to Figures 6 and 7. 6 is a schematic perspective view of a sole structure according to a second embodiment of the invention. 7 is a schematic bottom view of the sole structure of FIG. 6. Since the second embodiment is The first embodiment is similar, so the differences will be described below.

In this embodiment, the sole structure 1a has an arc-shaped recessed groove 10a, which is located on the tread surface 20, and the recessed groove 10a is disposed in the thicker portion 11a of the sole structure 1a. In FIG. 6, the thicker portion 11 a of the sole structure 1 a is at the rear end of the sole structure 1 a, that is, the portion of the sole structure 1 a corresponding to the heel.

In summary, in the sole structure, sole forming mold and sole forming method disclosed in the present invention, convex ribs are provided in the sole forming mold, so that the foam material injected into the sole forming mold has grooves matching the shape of the convex ribs after forming Therefore, a sole structure with a concave groove can be obtained after the foam material is cooled, wherein the concave groove divides the sole structure into a tread main body portion and a modeling peripheral portion. When the foam material cools, the cooling rate of the foam material constituting the peripheral part of the molding is greater than the cooling rate of the foam material constituting the main body part of the tread, so it can be ensured that the surface of the peripheral part of the molding has a rough texture. The peripheral part of the styling having a rough texture is exposed to the outside (the outer side of the peripheral part of the styling is exposed to the outside), and the peripheral part of the styling shields the tread main body part with a smooth texture in the horizontal direction of the sole structure. In this way, the sole structure does not need to be secondarily processed to roughen the surface (no roughening is required), it can have a good texture and aesthetics, and help reduce manufacturing costs.

Although the present invention is disclosed as the foregoing embodiments, these embodiments are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all modifications and retouching are within the scope of patent protection of the present invention. For the protection scope defined by the present invention, please refer to the attached patent application scope.

1‧‧‧sole structure

10‧‧‧recessed groove

121‧‧‧Outside

Claims (10)

A sole structure has a recessed groove that defines a sole body portion and a modeling peripheral portion connected to the sole structure, the recessed groove is interposed between the tread body portion and the modeling peripheral portion And the surface roughness of the peripheral part of the model is greater than the surface roughness of the tread body part. The sole structure as described in item 1 of the patent application scope, wherein the sole structure has a shoe tread, and the concave groove is located on the shoe tread. The sole structure as described in item 1 of the patent application scope, wherein the concave groove is ring-shaped. The sole structure as described in item 1 of the patent application scope, wherein the sole structure is made of foam material. The sole structure as described in item 1 of the patent application scope, wherein an outer edge of the modeling peripheral portion is opposite to the tread main body portion, and the concave groove is adjacent to the outer edge. The sole structure as described in item 5 of the patent application scope, wherein the volume of the peripheral part of the shape is smaller than the volume of the body part of the tread. The sole structure as described in item 5 of the patent application scope, wherein the distance between the concave groove and the outer edge of the peripheral portion of the shape is 2 centimeters (mm) to 3 centimeters. A shoe sole forming method includes: providing a shoe sole forming mold; injecting a heated foam material; and cooling the foam material to obtain a shoe sole structure, wherein the shoe sole structure has a recessed groove, and the recessed groove The sole structure defines a tread body portion and a modeling peripheral portion connected, the recessed groove is interposed between the tread body portion and the modeling peripheral portion, and the surface roughness of the modeling peripheral portion is greater than the tread body Partial surface roughness. The sole forming method as described in item 8 of the patent application scope, wherein the sole structure is not roughened. The sole forming method as described in item 8 of the patent application range, wherein the cooling rate of the peripheral part of the model is greater than the cooling rate of the tread main body part.

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