Preparation process of semitransparent double-color sole

Abstract

The invention relates to a preparation process of a semi-transparent double-color sole, which comprises the following steps: extruding by using an injection molding machine to obtain a white cold blank shell which is not foamed; extruding a fluorescent green material into the cold blank shell to obtain a cold blank insole; then putting the mixture into a foaming mold to be heated, and enabling the foaming ratio to be 1.5-1.65 times, so as to obtain a double-color foaming insole; and putting the double-color foaming insole and the bottom sheet into an oil pressure mold together, and integrally forming to obtain a final product. The material of the fluorescent green is uniformly distributed in the cold blank shell, the color transmission effect of the fluorescent green from the shell is good, color crossing is not prone to occurring between the inner core and the shell, the defective rate of products is low, and the production benefit is high.

Description

Technical Field

[0001] The invention relates to the technical field of sole manufacturing, in particular to a preparation process of a semi-transparent two-color sole. Background Art

[0002] Two-color soles refer to soles made of rubber materials of two different colors. They are usually used in various types of shoes such as sports shoes and casual shoes. They are a fashionable and unique design style, and are deeply loved by contemporary young people. When processing existing two-color soles, translucent or transparent rubber raw materials are first injected into the midsole mold to foam into an outer shell, and then brightly colored inner rubber raw materials are injected into the outer shell to continue foaming into inner and outer double-color soles. The products made by this process have shortcomings. The inner raw materials are unevenly distributed in the outer shell, the color transmission effect is not good, and the foaming is prone to color bleeding. The defective rate of the products is more than 15%, which seriously affects the production income. Summary of the invention

[0003] The invention provides a preparation process of a semi-transparent two-color sole, so as to overcome the problems of uneven color, easy color mixing, high defective product rate, etc. in the existing preparation of inner and outer two-color soles.

[0004] The present invention adopts the following technical solution:

[0005] A preparation process of a semi-transparent two-color sole comprises the following steps:

[0006] 1) The color-transmissive raw material is added into the injection molding machine, and is melt-extruded into the injection mold through the screw of the injection molding machine at an extrusion temperature of 60° C. to 90° C. to obtain a cold shell blank;

[0007] 2) adding the bright color raw material into another injection molding machine, and molten-extruded into the shell cold embryo through the screw of the injection molding machine, at an extrusion temperature of 60° C. to 90° C., to obtain a cold embryo midsole containing an inner core;

[0008] 3) The cold embryo midsole containing the inner core is placed in a foaming mold, heated and foamed, with a foaming ratio of 1.5-1.65 times, and cooled after foaming to obtain a semi-transparent two-color foamed midsole;

[0009] 4) Firstly put the bottom sheet into the hydraulic mold, then put the semi-transparent two-color foam midsole, and then hydraulically bond them into one piece to obtain the semi-transparent two-color sole.

[0010] Furthermore, the above-mentioned color-transmissive raw material is a translucent white EVA material.

[0011] Furthermore, the bright color raw material is fluorescent green EVA material.

[0012] Furthermore, the shell cold embryo thickness of the semi-transparent two-color foam midsole is 1 mm to 5 mm, and preferably the shell cold embryo thickness of the semi-transparent two-color foam midsole is 3 mm.

[0013] Furthermore, the color-transmissive raw material is a transparent foaming formula, which comprises EVA, a cross-linking agent, and a transparent foaming agent.

[0014] Furthermore, the bottom film is a rubber bottom film, and the bottom surface of the rubber bottom film is provided with an anti-slip pattern.

[0015] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: the present application adopts an injection molding machine to extrude a white cold embryo shell without foaming; then the fluorescent green material is extruded into the cold embryo shell to obtain a cold embryo midsole; then it is placed in a foaming mold for heating and foaming at a ratio of 1.5-1.65 times to obtain a two-color foamed midsole; then the two-color foamed midsole is placed together with the bottom film in a hydraulic mold and integrally formed to obtain the final product; the fluorescent green material is evenly distributed in the cold embryo shell, the fluorescent green has a good color transmission effect from the shell, and the inner core and the shell are not prone to color cross-talk, the product has a low defective rate and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the shell cold embryo of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the cold embryo midsole of the present invention.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the cold embryo midsole of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the semi-transparent two-color sole product of the present invention. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0021] A preparation process of a semi-transparent two-color sole comprises the following steps:

[0022] 1) adding a color-transmissive raw material into an injection molding machine, and extruding the raw material into an injection mold through a screw of the injection molding machine at a temperature of 60° C. to 90° C. to obtain a shell cold embryo 1, wherein a cavity 10 for placing an inner core 2 is provided in the shell cold embryo 1;

[0023] 2)Reference Figure 1 , adding the bright color raw material into another injection molding machine, and extruding it into the shell cold embryo through the screw of the injection molding machine, the extrusion temperature is 60° C. to 90° C., to obtain the cold embryo midsole containing the inner core 2;

[0024] 3) placing the cold embryo midsole containing the inner core 2 into a foaming mold, heating and foaming, with a foaming ratio of 1.5-1.65 times, and cooling after foaming to obtain a semi-transparent two-color foamed midsole;

[0025] 4) Firstly put the bottom sheet 21 into the hydraulic mold, then put the semi-transparent two-color foamed midsole, and then hydraulically bond them together to form a semi-transparent two-color sole.

[0026] Reference Figure 4 The above-mentioned color-transmitting raw material is a translucent white EVA material, and the color-transmitting raw material can also be transparent.

[0027] Reference Figure 4 The bright color raw material is fluorescent green EVA material, and the bright color raw material can also be flame red or vibrant orange EVA material.

[0028] Reference Figure 2 , Figure 3 The thickness of the shell cold embryo of the semi-transparent two-color foam midsole is 1mm to 5mm, and preferably the thickness of the shell cold embryo 1 of the semi-transparent two-color foam midsole is 3mm.

[0029] The above-mentioned color-transmitting raw material is a transparent foaming formula, and the outer shell after foaming has a transparent color effect, making the color of the inner kernel clearer when viewed from the outside.

[0030] The bottom sheet is a rubber bottom sheet, and the bottom surface of the rubber bottom sheet is provided with anti-skid patterns.

[0031] The fluorescent green material of the present application is evenly distributed in the cold embryo shell, the fluorescent green has a good color transmission effect from the shell, and the inner kernel and the shell are not prone to color mixing, the defective rate of the product is low, and the production efficiency is high.

[0032] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A process for preparing a semi-transparent two-color sole, characterized in that: The steps include: 1) The color-transmissive raw material is added into the injection molding machine, and is melt-extruded into the injection mold through the screw of the injection molding machine at an extrusion temperature of 60° C. to 90° C. to obtain a cold shell blank; 2) adding the bright color raw material into another injection molding machine, and molten-extruded into the shell cold embryo through the screw of the injection molding machine, at an extrusion temperature of 60° C. to 90° C., to obtain a cold embryo midsole containing an inner core; 3) The cold embryo midsole containing the inner core is placed in a foaming mold, heated and foamed, with a foaming ratio of 1.5-1.65 times, and cooled after foaming to obtain a semi-transparent two-color foamed midsole; 4) Firstly put the bottom sheet into the hydraulic mold, then put the semi-transparent two-color foam midsole, and then hydraulically bond them into one piece to obtain the semi-transparent two-color sole.

2. The process for preparing a semi-transparent two-color sole according to claim 1, characterized in that: The color-transmissive raw material is a translucent white EVA material.

3. The process for preparing a semi-transparent two-color sole according to claim 1, characterized in that: The bright color raw material is fluorescent green EVA material.

4. The process for preparing a semi-transparent two-color sole according to claim 1, characterized in that: The outer shell cold blank thickness of the semi-transparent two-color foamed midsole is 1mm to 5mm.

5. The process for preparing a semi-transparent two-color sole according to claim 2, characterized in that: The color-transmissive raw material is a transparent foaming formula, and the transparent foaming formula comprises EVA, a cross-linking agent, and a transparent foaming agent.

6. The process for preparing a semi-transparent two-color sole according to claim 1, characterized in that: The bottom sheet is a rubber bottom sheet, and the bottom surface of the rubber bottom sheet is provided with anti-skid patterns.

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