Head for extruding a thermoplastic tubular member

US4152104A · kind A · utility

Assignee

• Mauser-Kommandit Gesellschaft · DE

Inventors

• Dietmar Przytulla · Kerpen, DE
• Manfred Lehmann · Cologne, DE

Key dates

• Filing date: Mar 14, 1978
• Grant date: May 1, 1979
• Expiry date: Mar 14, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/335
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In an axially extending extruder head for producing a thermoplastic tubular member, the material to be extruded is first supplied into a pair of annular first passageways spaced apart in the axial direction of the head, these passageways extend obliquely of the head axis. From the first passageways the material enters an axially elongated annular second passageway extending between the two first passageways. An annular third passage, extending transversely of the head axis, conveys the material from the second passageway into an axially extending feed passageway from which the material is extruded through the nozzle end of the head. The first, second and third passageways can be located in different parts of the extruder head.