Extrusion head

US6773249B1 · kind B1 · utility

Assignee

• Mauser Werke GmbH · DE

Inventors

• Dietmar Przytulla · Kerpen, DE
• Peter Langos · Sankt Augustin, DE

Key dates

• Filing date: Sep 5, 2000
• Grant date: Aug 10, 2004
• Expiry date: Sep 5, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/09
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to an extrusion head for producing a tubular parison (22) in order to manufacture large-volume, blow molded plastic hollow bodies. The inventive extrusion head has an adjustable ring-shaped tube outlet nozzle for selectively adjusting the nozzle opening (20) in order to alter the wall thickness of the exiting parison (22). In order to provide a multiple adjustability of the extruded tube cross section, the invention provides that the extrusion head comprises at least three separate nozzle/mandrel gap adjustment elements (D 0=mandrel, DS I, DS II, DS III) which are differently profiled and exchangeable. The elements can be individually and/or simultaneously brought into working contact with the exiting parison (22) in the mandrel gap (20) from inside and/or outside, whereby at least two of the adjustment elements (D 0=mandrel, DS I, DS II, DS III) are configured such that they can be adjusted. To this end, the at least two adjustment elements are each equipped with a corresponding adjusting drive.