Method for producing a plastic article and blow molding tool

US8951461B2 · kind B2 · utility

Assignee

• KAUTEX MASCHINENBAU GMBH · DE

Inventors

• Volker Heim · Oberhausen, DE
• Andreas Lichtenauer · Bonn, DE
• Jurgen Moitzheim · Rübhausen, DE
• Stefan Walbroel · Sankt Augustin, DE

Key dates

• Filing date: Jun 22, 2010
• Grant date: Feb 10, 2015
• Expiry date: Nov 23, 2031

Classification

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

Abstract

The invention relates to a method for producing a plastic article and a blow molding tool for performing the method. The method comprises extruding an approximately tube-shaped preform, dividing the melt flow within the extrusion head or separating the extrudate exiting or already exited from the extrusion head, such that a preform having an approximately C-shaped cross section is obtained, forming the preform into a hollow part within a multipart blow molding tool using differential pressure, wherein an expansion and partial preforming of the preform first takes place with the blow molding tool partially closed, then in a further step at least one insert is inserted into the interior of the partially preformed article between the not completely closed blow molding tool and through the open side of the preform, and in a further step the blow molding tool is completely closed; wherein the article is completely formed, forming at least one at least partially circumferential pinch-off seam.