Circular arc core pulling mechanism for injection mould

Abstract

A circular arc core pulling mechanism for an injection mould comprises a mould main body. An upper mould base and a lower mould base are arranged in the mould main body. A male mould body is arranged in the upper mould base, a female mould body is arranged in the lower mould base, and a mould cavity is formed between the male mould body and the female mould body. A first straight insert is arranged in the female mould body, and a first laterally-protruding sliding block is arranged on the lower mould base and connected with the first insert. A second bent insert is arranged in the male mould body, a second laterally-protruding sliding block is arranged on the upper mould base, a first connecting rod is arranged at the front end of the second sliding block, a second connecting rod is hinged to the upper end of the second insert, and the first connecting rod is hinged to the second connecting rod. The front end of the first insert is connected with the lower end of the second insert. According to the circular arc core pulling mechanism, core pulling is conducted on the first insert and the second insert, and a secondary connecting rod core pulling structure is composed through the first connecting rod and the second connecting rod, so that interference of the second bent insert with an injection finished product and an upper mould core is eliminated when core pulling is conducted on the second bent insert, smooth demoulding of the second insert is guaranteed, and accordingly a large-angle bent pipe is formed integrally.

Description

technical field [0001] The invention relates to an arc core pulling mechanism of an injection mold. Background technique [0002] Plastic injection molds are tools for producing plastic products and are widely used. In the injection molding of plastic products, since some plastic products have inner concaves, side grooves, side holes, etc., it is necessary to set a mold core and take out the mold core by pulling the mold after the plastic part is molded. [0003] Due to the increasing quality requirements of consumers for products, in order to increase the performance of plastic products in all aspects, it is necessary to perform integrated injection molding of parts that were originally assembled separately, which also increases the difficulty of processing. For example, for large-angle plastic elbows or elbows with straight pipe sections, the conventional method is to adopt multi-stage separate molding and then assemble them. Now it is necessary to integrally form the elb...

AI Technical Summary

Problems solved by technology

In the existing technology, after the injection molding is completed, the inserts of the mold will interfere with the mold core or the injection molded part itself when it is pulled out, resulting in the failure to demould smoothly

There are still many ways to pull plastic mold cores, but there are few extraction methods with curved holes. The industry urgently needs a convenient, stable and reliable extraction mechanism for curved cores.

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