Apparatus for the production of hollow bodies from thermoplastic material by an extrusion blow molding process

US5576034A · kind A · utility

Assignee

• Krupp Kautex Maschinenbau GmbH · DE

Inventors

• Erich Kiefer · Bonn, DE
• Karsten Friedrichs · Bad Honnef, DE
• Klaus Baltes · Bergheim, DE

Key dates

• Filing date: Feb 3, 1995
• Grant date: Nov 19, 1996
• Expiry date: Feb 3, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/7172
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In an apparatus for the production of hollow bodies from thermoplastic material by use of extrusion blow molding, having at least two blow molding units and an extrusion system, in an operating cycle each blow molding unit is movable between a receiving position in which the opened blow molding mold receives a preform and at least one other position in which the expanded hollow body is removed from the blow molding mold. Each blow molding unit is firstly moved from a station remote from the removal station in at least one direction into the removal station and opened after reaching the removal station, whereupon the hollow body previously produced in the blow molding mold is removed. The respective blow molding unit is then moved by use of a second movement in another direction, with the blow molding mold open, into the receiving position which is arranged laterally displaced relative to the path of movement along which the blow molding unit is moved into the removal station.