Composite core-pulling device for realizing single mould cavity and dual injection mould

Abstract

The invention discloses a composite core-pulling device used for realizing single-die cavity and double injection molds; the die is provided with a die cavity; the core pulling device is arranged in the die cavity; the composite core pulling device consists of a primary core pulling device and a secondary core pulling device which have different functions; the primary core pulling device is used for separating and perforating of the die cavity spaces of two materials; the secondary core pulling device is used for leading the product to be completely formed and leading the product to be in a state of demoulding, ejecting and taking-out; the two core pulling devices can be assembled together to realize the forming of double injection product in the single die cavity.

Description

technical field [0001] The invention belongs to the field of injection molds, in particular to the development of a composite core-pulling device for a double-shot mold. Background technique [0002] Plastic injection mold is a tool for producing plastic products, and it is widely used. Most of the two-shot products on the market are produced by double-cavity double-shot molds, and the shape is small, and most of them are daily necessities. Its production process is to complete the injection molding of one material, open the mold and rotate the core, then close the mold, and then inject the second material to obtain a two-shot product. This method greatly prolongs the production cycle of the product, the scrap rate of the product is higher when the mold is closed again, and the production cost remains high all the time, which is difficult to reduce. Moreover, this process molding method is only suitable for small and medium-sized products. For large-scale two-shot products ...

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Problems solved by technology

This method greatly prolongs the production cycle of the product, the scrap rate of the product is high when the mold is closed again, and the production cost has been high, which is difficult to reduce.

Moreover, this process molding method is only suitable for small and medium-sized products. For large-scale two-shot products (such as car gutters 1390*345*180), the use of a double-cavity structure will reduce the working space of the mold, the working cycle, the accuracy guarantee, and the mold. The cost and product production cost are difficult to meet the expected requirements, and cannot meet the needs of mass production of large two-shot molds

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