Extruder with ceramic processing unit

US4941748A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Werner Pusch · Leverkusen, DE
• Martin Ullrich · Leverkusen, DE

Key dates

• Filing date: Mar 7, 1989
• Grant date: Jul 17, 1990
• Expiry date: Mar 7, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2909/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

On a single-screw or multi-screw extruder, the part of the barrel lying between a front plate (1) and end plate (2) bounding the processing unit is subdivided into barrel discs (5) of ceramic materials, which are arranged on at least one guide rail (7). The barrel discs (5) are held together by an anchor (9) fixed on the front plate (1) and end plate (2) and at the same time secured against twisting. In addition, the screw elements (3) within the processing unit between front plate (1) and end plate (2) are also made from the same or from another ceramic material.