阅读说明：本技术 一种胶粉适用于生橡胶大底材料与eva中底材料的粘着工艺 (Adhesive powder suitable for adhesion process of raw rubber outsole material and EVA insole material ) 是由 宾家荃 宾家齐 于 2019-10-22 设计创作，主要内容包括：本发明涉及鞋底制备工艺技术领域,具体为一种胶粉适用于生橡胶大底材料与EVA中底材料的粘着工艺,包括如下步骤：S1、撒粉；S2、红外活化；S3、压制；S4、修边；S5、合模；S6、检验。本粘着工艺广泛适用于生橡胶大底材料与EVA中底材料的黏着,具备自动化生产的条件,可有效地缩短鞋底的生产流程,减少人员空间,节约能源,整个流程无VOC产生,采用模具压制成型,无需手工贴合,可有效减少报废率,提高生产效率,产能高,具有突出的实质性特点和显著的进步。(The invention relates to the technical field of sole preparation processes, in particular to a process for adhering raw rubber outsole materials and EVA midsole materials by using rubber powder, which comprises the following steps: s1, dusting; s2, infrared activation; s3, pressing; s4, trimming; s5, die assembly; and S6, checking. The adhesion process is widely applicable to adhesion of raw rubber outsole materials and EVA insole materials, has automatic production conditions, can effectively shorten the production flow of soles, reduce personnel space, save energy, has no VOC in the whole flow, adopts die press molding, does not need manual lamination, can effectively reduce rejection rate, improves production efficiency, has high productivity, and has outstanding substantive characteristics and remarkable progress.)

1. The adhesive powder is suitable for the adhesion process of a raw rubber outsole material and an EVA insole material, and is characterized by comprising the following steps:

s1, dusting: enabling the rubber powder to be uniformly distributed on the surface of the raw rubber outsole according to the shape of the raw rubber outsole through a gravity-free powder scattering operation system;

s2, infrared activation: placing the raw rubber outsole with the surface scattered with the rubber powder in the step S1 into an activation box, and performing infrared instant activation to prevent the rubber powder from being separated from the surface of the raw rubber outsole due to touch;

s3, pressing: placing the activated raw rubber outsole in the step S2 into a mold for pressing the raw rubber outsole, covering the surface of rubber powder with an anti-sticking and high-temperature-resistant PET protective film or using a good Teflon coating for anti-sticking of the rubber outsole mold, and finishing pressing to form a cured rubber outsole;

s4, trimming: trimming and polishing the cooked rubber outsole pressed in the step S3 into a finished rubber outsole product, and performing trimming and polishing coarse treatment on the finished EVA insole;

s5, mold closing: placing the finished rubber outsole product in the step S4 into an integrally formed EVA mold, placing the finished rubber outsole product into a corresponding EVA insole for sole assembly, closing the mold and pressing for a period of time, heating for 5-12min, and then cooling with water for 5-12min to form a complete sole;

s6, checking: and (5) checking the sole in the step S5 to be qualified, and then obtaining the qualified sole.

2. The adhesive powder of claim 1, which is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: the rubber powder in the step S1 is prepared by mixing ethylene-vinyl acetate, maleic anhydride graft of polypropylene, polyethylene wax and polyethylene.

3. The adhesive powder of claim 2 is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: the ethylene-vinyl acetate, the maleic anhydride graft of the polypropylene, the polyethylene wax and the polyethylene are 20: (60-75): (0.1-2): (3-8): (2-5) in proportion.

4. The adhesive powder of claim 3, which is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: the particle sizes of the ethylene-vinyl acetate, the maleic anhydride graft of the polypropylene, the polyethylene wax and the polyethylene are 10-2000 meshes.

5. The adhesive powder of claim 1, which is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: the time for instant activation in the step S2 is generally 8-20 seconds, and the surface temperature of the raw rubber outsole is controlled below 150 ℃.

6. The adhesive powder of claim 1, which is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: the pressing temperature in the step S3 is 150-160 ℃, the pressing time is 3-6min, and the pressing pressure is 50-100 kg-f.

7. The adhesive powder of claim 1, which is suitable for the adhesion process of a raw rubber outsole material and an EVA midsole material, and is characterized in that: in the step S5, the mold closing and pressing time is 10-20min, the temperature is 150-160 ℃, and the pressure is 50-100 kgf.

Technical Field

The invention relates to the technical field of sole preparation processes, in particular to a process for adhering raw rubber outsole materials and EVA midsole materials by using rubber powder.

Background

At present, the shoe industry basically uses an adhesive to coarsely treat the adhesion of a rubber outsole and an EVA insole, the adopted production flow is very long, the rubber outsole needs to be roughened or washed by water, then a solvent type adhesive or a water-based adhesive is brushed, the EVA insole is roughened or treated by UV (ultraviolet) irradiation liquid medicine, then the solvent type adhesive or the water-based adhesive is brushed, the rubber outsole and the EVA insole are dried and activated through a very long assembly line, and then the rubber outsole and the EVA insole are manually bonded to form the whole sole. Or some existing technologies use the glue film to be used for the rubber outsole and the EVA midsole which are formed in one step, but have many limitations, and the existing technologies have the following disadvantages: 1. the production line flow is ultra-long, a lot of personnel are needed, space is wasted, 2, energy is wasted, multiple times of drying are needed, 3, the VOC gas content in a workshop is very high, the environment is not protected, 4, the error of manual lamination is large, the rejection rate is high, 5, the efficiency is low, the capacity is low, and the method is not suitable for adhesion of a rubber outsole with a high side wall or large radian and an EVA insole.

Disclosure of Invention

The invention aims to provide a process for adhering raw rubber outsole material and EVA midsole material by using rubber powder, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a process for adhering raw rubber outsole material and EVA insole material by using rubber powder comprises the following steps:

s1, dusting: enabling the rubber powder to be uniformly distributed on the surface of the raw rubber outsole according to the shape of the raw rubber outsole through a gravity-free powder scattering operation system;

s2, infrared activation: placing the raw rubber outsole with the surface scattered with the rubber powder in the step S1 into an activation box, and performing infrared instant activation to prevent the rubber powder from being separated from the surface of the raw rubber outsole due to touch;

s3, pressing: placing the activated raw rubber outsole in the step S2 into a mold for pressing the raw rubber outsole, covering the surface of rubber powder with an anti-sticking and high-temperature-resistant PET protective film or using a good Teflon coating for anti-sticking of the rubber outsole mold, and finishing pressing to form a cured rubber outsole;

s4, trimming: trimming and polishing the cooked rubber outsole pressed in the step S3 into a finished rubber outsole product, and performing trimming and polishing coarse treatment on the finished EVA insole;

s5, mold closing: placing the finished rubber outsole product in the step S4 into an integrally formed EVA mold, placing the finished rubber outsole product into a corresponding EVA insole for sole assembly, closing the mold and pressing for a period of time, heating for 5-12min, and then cooling with water for 5-12min to form a complete sole;

s6, checking: and (5) checking the sole in the step S5 to be qualified, and then obtaining the qualified sole.

Preferably, the rubber powder in step S1 is selected from ethylene-vinyl acetate, maleic anhydride graft of polypropylene, polyethylene wax, and polyethylene.

Preferably, the ethylene-vinyl acetate, the maleic anhydride graft of the polypropylene, the polyethylene wax and the polyethylene are mixed according to the weight ratio of 20: (60-75): (0.1-2): (3-8): (2-5) in proportion.

Preferably, the particle size of the ethylene-vinyl acetate, the maleic anhydride graft of the polypropylene, the polyethylene wax and the polyethylene is 10-2000 meshes.

Preferably, the time for instant activation in step S2 is generally 8 to 20 seconds, and the surface temperature of the raw rubber outsole is controlled to be below 150 ℃.

Preferably, the pressing temperature in the step S3 is 150-160 ℃, the pressing time is 3-6min, and the pressing pressure is 50-100 kgf.

Preferably, in the step S5, the mold closing and pressing time is 10-20min, the temperature is 150-160 ℃, and the pressure is 50-100 kgf.

Compared with the prior art, the invention has the beneficial effects that: the adhesion process is widely applicable to adhesion of raw rubber outsole materials and EVA insole materials, has automatic production conditions, can effectively shorten the production flow of soles, reduce personnel space, save energy, has no VOC in the whole flow, adopts die press molding, does not need manual lamination, can effectively reduce rejection rate, improves production efficiency, has high productivity, and has outstanding substantive characteristics and remarkable progress.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the gravity-free dusting and instant activation of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides the following technical solutions: