Mandrel for injection blow molding mold

Abstract

The invention discloses a mandrel of an injection blow molding mold, the air outlet of which is arranged on the end side of the shell, and a heat insulation structure is arranged in the shell, so that the end of the preform is ahead of the middle part of the preform It starts to be inflated, but the two eventually complete the expansion molding synchronously; and can maintain a lower temperature at the bottle mouth of the preform. The container obtained by blowing the mandrel has the advantages of beautiful appearance and uniform bottom thickness.

Description

technical field [0001] The invention relates to a core rod of an injection blow molding mold. Background technique [0002] The mandrel of the injection blow molding mold is a key part of the blow molding equipment used to prepare the preform and blow the preform into a container. It plays a vital role in the blow molding process, especially after blow molding. When PS (polystyrene plastic), PET (polyterephthalic acid plastic), PC (polycarbonate plastic) are used as bottles, the mandrel must have the function of temperature control. In the prior art, the mandrels of injection blow molding molds with temperature control include mandrel body, water pipe and mandrel head. The temperature adjustment device of the mandrel in the molding equipment, in its structure, the water pipe is installed inside the mandrel head, one end of the mandrel head extends into the mandrel body, and there is an air delivery channel between the mandrel head and the mandrel body. The outlet of the ai...

AI Technical Summary

Problems solved by technology

However, affected by the above-mentioned defects, the preform is heated as a whole during the inflation process, and the setting effect of the container after forming is not good, and the neck of the bottle is prone to twisting, which reduces the appearance of the bottle mouth.

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