Single-screw extruder

US12403430B2 · kind B2 · utility

Assignee

• BATTENFELD-CINCINNATI GERMANY GMBH · DE

Inventors

• Markus Bornemann · Paderborn, DE
• Juergen Huegelmeyer · Osnabrück, DE

Key dates

• Filing date: Nov 1, 2020
• Grant date: Sep 2, 2025
• Expiry date: Dec 13, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/60
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A single-screw extruder for conveying and plasticizing a meltable material, including a screw and a heated cylinder, wherein the screw is rotatably held in the heated cylinder, the screw has a core and a helical main flight, which is at a first distance from the internal wall of the cylinder, a region of a transition zone and a melting zone has at least two successive, non-overlapping barrier portions, and a cylinder-side outside flight surface of one or more overflow flights is chamfered in full or in part over a flight width such that a conical gap that gets narrower in an overflow direction is formed between the internal wall of the cylinder and the cylinder-side outside flight surface.