Leak-free connections for blow molding machines

Abstract

A molding station (1) for molding a plastic parison (10) into a plastic container, wherein the molding station (1) has two sides for supporting side parts (14, 16) of a blow mold Part supports (4, 6); and a bottom part support (2) for supporting a bottom part (18) of a blow mold, the side parts (14, 16) and the bottom part (18) of the blow mold Together they form a cavity (15) in which a plastic parison (10) can be molded into a plastic container by applying a fluid medium, wherein the bottom part support (2) has a base support (22), wherein the The base support (22) is arranged immovably relative to the side part supports (4, 6) in the longitudinal direction (L) of the plastic parison to be expanded in the closed state of the blow mould, and is arranged at the A bottom part support element (24) on the substrate support (22), said bottom part support element being movable relative to the substrate support (22) along said longitudinal direction (L). According to the invention, a flow connection for a flowable medium can be established between the base support and the bottom part support element (24) by means of at least one first coupling device (8), and said coupling device ( 8) Constructed without leakage.

Description

technical field [0001] The present invention relates to an apparatus and method for forming plastic preforms into plastic containers. Such devices and methods are known from the prior art for a long time. Usually, in these methods, the plastic parison is first heated, and then the plastic parison is expanded into a plastic bottle in the blow molding station by applying a gaseous medium, in particular compressed air. More specifically, a plastic parison is introduced into a blow mold which in turn forms a cavity in which the plastic parison expands. Background technique [0002] In this case, these blow molds generally consist of at least two side parts together with a bottom part, which are displaceable relative to each other. Rather, here generally the two side parts can be pivoted relative to the longitudinal axis, and the bottom part can be advanced along this longitudinal direction. Furthermore, methods are known in which additional movements of the bottom part within...

AI Technical Summary

Problems solved by technology

However, the problem arises that, when changing the blow mould, overflow of the tempering liquid occurs

In other words, this processing method does not allow a leak-free connection of the two components, or it can only be achieved by providing a sealing cost

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