Middle sole and manufacturing technique thereof

Abstract

The invention relates to the technical field of manufacturing technique of a sole, in particular to a manufacturing technique for a middle sole. The middle sole comprises a PU layer and a TPR layer. The technique comprises the following steps: a. a PU material prepared is cut according to the shape of the middle sole so as to manufacture the PU layer of the middle sole; b. the PU layer manufactured is put into an injection mold; c. a TPR material is injected into the injection mold with the PU layer by an injection technique, the TPR material forms the TPR layer of the middle sole after beingcooled and formed, and then the mold is unloaded. To sum up, the adoption of the technique can not only greatly improve the production efficiency of the middle sole, but also ensure the quality of thePU layer and the TPR layer of the middle sole, prolong the service life of the middle sole and cause products to meet the requirement of environmental protection.

Description

Technical field: [0001] The invention relates to the technical field of manufacturing technology of shoe soles, in particular to a manufacturing technology of shoe midsoles. Background technique: [0002] Usual soles include midsoles and soles, wherein midsoles are a layer of material above the outsoles, see Chinese Patent Application Publication No. 200410026765, which discloses "a manufacturing method for midsoles of shoes" ", the technical solution proposed in the patent application of the present invention is: firstly make the middle part, then place the finished middle part in the center of the shoe midsole mold, inject PU material into the mold space around the middle part by injection molding, The outer edge is formed, and the outer edge and the middle part are fixed together by injection molding; finally, the finished midsole is taken out from the mold. The above-mentioned middle part is made by foaming the cut and shaped EVA material. Or the above-mentioned middle...

AI Technical Summary

Problems solved by technology

[0004] First, if the PU layer and the PVC layer are cut separately and then pasted, a large amount of manpower is required and the efficiency is low.

[0005] Second, if the production process of laminating first and then cutting is adopted, although the work efficiency has been improved, a large amount of glue is required, and the quality of laminating large areas is difficult to guarantee, and defective products are easily formed.

[0006] Third, the cutting results in a lot of PVC leftovers, resulting in waste of materials

[0007] Fourth, the efficiency of the bonding process is also low. More importantly, the glue application cannot be controlled evenly, which may easily cause partial bonding and cause defective products.

[0008] Fifth, the artificially fitted shoe midsole is easy to degumming during use, especially during the washing process, which greatly shortens the service life of the shoe midsole

[0009] Sixth, a large amount of glue is used as an adhesive, which is not conducive to environmental protection

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