Reshaping station for blow molding machines without pressure pads

Abstract

The invention relates to a reshaping station (1) for reshaping plastic preforms (10) into plastic containers. The reshaping station (1) has two lateral part supports (4, 6) for supporting lateral parts (14, 16) of a blow mold and preferably a base part support for supporting a base part of the blow mold. The lateral parts (14, 16) and the base part (18) of the blow mold together form a cavity (15)within which the plastic preforms (10) can be reshaped into the plastic containers by applying a flowable medium. At least one of the two lateral part supports can be pivoted relative to the other lateral part support with respect to a specified main axis (S) in order to open and / or close the blow mold, and the reshaping station has a locking mechanism in order to lock one lateral part support (4) with the other lateral part support (6) in a closed state of the blow mold. The locking mechanism (20) has a first locking element (22) which can be pivoted with respect to a specified pivot axis (S1) and which engages into a second locking element (24) in order to lock the lateral part supports. According to the invention, at least one of the two locking elements has a first contact surface (26) which is suitable for interacting with a second contact surface (28) of the second locking element (24) when locking with the second locking element (24). At least one of the contact surfaces is designed such that the two lateral part supports (4, 6) are forced against each other during a pivoting process of the first locking element (26) with respect to the pivot axis (S1) in the direction of the second locking element (28).

Description

technical field [0001] The invention relates to a forming station for forming plastic parisons into plastic containers. This molding station, which can be used as part of a blow molding machine, is used for the production of plastic bottles. In this case, heated plastic parisons are introduced into the inlet of the blow mold and formed there by blowing air into plastic containers, in particular plastic bottles. For this purpose, these molding stations usually have blow mold supports for supporting the parts of the blow mold. The plastic parison is introduced into the blow mold, the mold is closed and the plastic parison is allowed to expand. Background technique [0002] In this case, it is known in the prior art that especially the point where the sides of the blow mold touch each other is critical in the production of plastic parisons and that this creates a seam on the finished bottle. Various procedures for maintaining these seams as small seams are known in the prior...

AI Technical Summary

Problems solved by technology

However, relatively high costs are incurred due to the need for pressure pads to achieve a flush and positive engagement of the blow mold, e.g. for supplying compressed air to the pressure pads

Tubing and pressure pad seals are also quite expensive

In addition, comparatively high machining costs are required for the control of the pressure pad and, due to faults and severe wear, high outlays are also required

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