Multicolor EVA injection mold

Abstract

The invention relates to the technical field of shoemaking molds, and provides a multicolor EVA injection mold which is suitable for the conventional single-color EVA injection machine, and can be used for producing double-color or multicolor EVA finished products. The multicolor EVA injection mold comprises a lifting board, a backing board, a sealing board, an upper mold, a middle board and a lower mold which are arranged from the top down in sequence, wherein mold cavities are formed in both the opposite sides of the upper mold and the lower mold; a sprue communicated with the mold cavity of the upper mold is formed in the upper mold; the middle board is arranged between the upper mold and the lower mold in a drawable manner; the lifting board and the sealing board are connected with each other through a suspension structure which can expand and contract in the thickness direction of the lifting board; an accommodating cavity with an open-close function is formed between the lifting board and the sealing board through the suspension structure; the backing board is arranged in the accommodating cavity in a drawable manner.

Description

technical field [0001] The invention relates to the technical field of shoemaking molds, in particular to a multi-color EVA injection mold. Background technique [0002] Because EVA resin blended foam products have softness, good elasticity, and chemical corrosion resistance, they are widely used as shoe materials in slippers, sandals, casual shoes and other shoes. At present, most of the machines used to make EVA shoes at home and abroad use The single-color EVA injection machine is a single-color EVA injection machine, which achieves the purpose of one-time injection molding of EVA shoes through the combination of a single-color EVA injection machine and an EVA mold. It can only be used to produce various slippers, shoe soles and other finished products made of monochrome EVA material, because the single gun of the monochrome EVA injection machine can only inject EVA raw materials of one color and one physical property into the EVA mold at one time. Forming and foaming, ...

AI Technical Summary

Problems solved by technology

[0002] Because EVA resin blended foam products have softness, good elasticity, and chemical corrosion resistance, they are widely used as shoe materials in slippers, sandals, casual shoes and other shoes. At present, most of the machines used to make EVA shoes at home and abroad use The single-color EVA injection machine is a single-color EVA injection machine, which achieves the purpose of one-time injection molding of EVA shoes through the combination of a single-color EVA injection machine and an EVA mold. It can only be used to produce various slippers, shoe soles and other finished products made of monochrome EVA material, because the single gun of the monochrome EVA injection machine can only inject EVA raw materials of one color and one physical property into the EVA mold at one time. Forming and foaming, and with the improvement of people's living standards and individual requirements, the market has required the ability to produce two-color or more-color EVA shoes. Therefore, traditional single-color EVA injection machines and traditional EVA molds are used. The production process of EVA injection molding has fallen behind and cannot meet market demand

[0003] The Chinese patent application No. 201110281544.6 discloses a mold for manufacturing two-color EVA soles, which includes an upper mold, a lower mold, an upper color separation plate, and a lower color separation plate. There is a mold cavity in the middle of the upper mold and the lower mold. The upper color separation plate is matched with the upper mold, and the lower color separation plate is matched with the lower mold. Both the upper mold and the lower mold are equipped with channels for injecting EVA material into the mold cavity. The combination of the two-color EVA injection machine with two guns can effectively realize the production of two-color EVA shoes, improve the manufacturing quality and production efficiency, but the mold for manufacturing the two-color EVA sole needs to be matched with a special two-color EVA injection machine If the manufacturer wants to make two-color EVA foam soles, it is necessary to re-purchase a two-color EVA injection machine. The cost of this special two-color EVA injection machine is too high, which increases the production cost. Many small shoe material manufacturers It will be impossible to purchase due to insufficient funds; at present, most of the existing machines used by many shoe material manufacturers are single-color EVA injection machines. The combination of using the existing monochrome EVA injection machine will also cause the monochrome EVA injection machine to be idle, resulting in waste of resources

Images