Process and apparatus for the blow molding of containers using wall-thickness measurement of the molded article

US7887742B2 · kind B2 · utility

Assignee

• KHS Corpoplast GmbH & Co. KG · DE

Inventors

• Michael Linke · Hamburg, DE
• Michael Litzenberg · Geesthacht, DE
• Rolf Baumgarte · Ahrensburg, DE
• Frank Lewin · Tangstedt, DE

Key dates

• Filing date: Feb 22, 2007
• Grant date: Feb 15, 2011
• Expiry date: Feb 22, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2067/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The process and the apparatus serve for the blow moulding of containers (2). A parison (1) composed of a thermoplastic material is first subjected to heat conditioning along a transport path in the region of a heating section (30). The parison is then subjected to a forming process within a blow mould with exposure to blowing pressure to give heat container. The heat conditioning of the parisons is carried out by a plurality of mutually superposed radiant heaters (41). The blow moulding of the container is followed by wall-thickness measurement at at least one level within the height of the container. The heating power of a radiant heater associated with this height level is controlled. The control system receives a prescribed wall-thickness value as required value and the measured wall thickness as actual value.