Extruder slot die head

US3988097A · kind A · utility

Assignee

• Hermann Berstorff Maschinenbau GmbH · DE

Inventors

• Dietmar Anders · Hannover, DE
• Gerd Capelle · Langenhagen, DE

Key dates

• Filing date: Mar 17, 1975
• Grant date: Oct 26, 1976
• Expiry date: Mar 17, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/305
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Ejecting means, in a slot die head to extrude plastic material in a strip, whereby material left in the slot die head after extrusion has ceased can be removed, comprising a piston mounted with its crown flush with the inner wall of a distributing passage in the slot die head, so that, after the slot die head has been opened by separately upper and lower parts thereof, the piston can be moved hydraulically to project into the distributing passage to lift the residual material away from the wall of the distributing passage containing the piston to facilitate grasping of the material by an operator and stripping from the slot die head.