Patent · US Expired

Process for blow molding hollow bodies with symmetric mold portion movement

US5250238A · kind A · utility

6Cited by

7References

23Claims

0Family size

Assignee

Krupp Kautex Maschinenbau GmbH · DE

Inventors

Erich Kiefer · Bonn, DE
Peter Klusener · Bonn, DE
Karsten Friedrichs · Bad Honnef, DE

Key dates

Filing date	Oct 11, 1991
Grant date	Oct 5, 1993
Priority date	—
Expiry date	Oct 11, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C33/22
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process and apparatus for the production of hollow bodies from thermoplastic material by means of blow molding uses a blow molding mold which includes at least first and second mold portions to enclose a generally tubular extruded preform which is expanded within the mold under the effect of an increased internal pressure within the preform. To provide for asymmetric closing and/or opening movements of the mold portions relative to the preform, the blow molding mold is displaced as an entirety parallel to the direction of the opening and/or closing movements of the mold portions, more especially during the mold closing and/or opening procedure, so that an additional motion is superimposed on the movements of the mold portions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.