Method and apparatus for the continuous manufacture of rubber or polymer-based mixtures containing additives

US4897236A · kind A · utility

Assignee

• Hermann Berstorff Maschinenbau GmbH · DE

Inventors

• Norbert Rabiger · Bremen, DE
• Manfred Dienst · Neuss, DE

Key dates

• Filing date: Sep 1, 1988
• Grant date: Jan 30, 1990
• Expiry date: Sep 1, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2105/16
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process and an apparatus for continuously producing a rubber mixture. In the process, the constituents of the mixture are fed into a twin-screw extruder and are masticated and homogenized therein, with approximately 5% of the mixture being discharged and the remainder being recycled for further homogenization and for mixing with fresh batches of the constituents being fed into the extruder. The recycled mixture is circulated to and returned from a cooled, annular chamber dispersed exteriorly of the chamber of the twin-screw extruder, with the annular chamber having outflow and inflow passages communicating with the interior of the extruder.