Plastic bottle blow forming mold

Abstract

The invention provides a plastic bottle blow forming mold and relates to the technical field of blow molding. The plastic bottle blow forming mold is used for blow forming of tubular bottle performs with bottoms. The plastic bottle blow forming mold comprises a lower mold, an upper mold and a liquid blow molding device. The middle portion of the top end of the upper mold is provided with a moldingcavity penetrating through the bottom end of the upper mold. The lower mold is arranged at the bottom end of the upper mold. The lower mold seals the bottom end of the molding cavity of the upper mold. According to the plastic bottle blow forming mold, an annular clamping groove is formed in the position, located at a neck ring, of the top end of the upper mold; the inner wall of the clamping groove is equidistantly provided with pneumatic clamping assemblies; the liquid blow molding device is clamped and fixed through the pneumatic clamping assemblies; movable clamping jaws clamp and hold the liquid blow molding device in the clamping groove, so that the liquid blow molding device is firm and reliable in installation and high in airtightness. The plastic bottle blow forming mold conductsclamping and fixing on the liquid blow molding device through the pneumatic clamping assemblies and has the advantages of being flexible in operation, high in loosening and clamping efficiency, largein clamping force and the like.

Description

Technical field [0001] The invention relates to the technical field of blow molding processing, in particular to a plastic bottle blow molding mold. Background technique [0002] As a blow molding apparatus for blow molding a resin preform into a container, Patent Document 1: JP 2004-122457 A; [0003] For example, Patent Document 1 discloses a blow molding apparatus including: a metal mold for blow molding (blow molding die); a stretch rod that stretches the preform; and a support column , Which supports the bottom of the preform from the outside of the preform. As far as this blow molding device is concerned, while supporting the bottom of the preform with a support column, the preform is stretched in the axial direction by a stretching rod inserted into the inside of the preform, and then the preform is fed into the preform. The compressed gas stretches (expands) in the radial direction. [0004] As a method of blow molding a preform into a container, in addition to a method of...

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Problems solved by technology

[0006] In view of the problems in the prior art, the object of the present invention is to provide a plastic bottle blow molding mold, which solves the problem of making the support column always contact the bottom of the bottle blank when the preheated bottle blank is placed in the blow molding mold, If the temperature of the bottom of the preform decreases due to the contact with the support column, the curing will be accelerated, and the bottom of the preform cannot be fully stretched during blow molding, and the thickness of the bottom of the molded container cannot be adjusted to the expected thickness. bad technical problem

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