Device and method for producing plastic granulate

US11273576B2 · kind B2 · utility

Assignee

• COPERION GMBH · DE

Inventors

• Ulrich Conrad · Elze, DE
• Norbert Kern · Kandel, DE
• Markus Schmudde · Murr, DE
• Bernhard Stöhrer · Pleidelsheim, DE
• Heiko Hornberger · Hessigheim, DE

Key dates

• Filing date: Jul 27, 2017
• Grant date: Mar 15, 2022
• Expiry date: May 8, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B2200/08
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A device for producing dyed plastic granulate and undyed plastic granulate includes a multi-shaft screw extruder and an underwater pelletizing installation. A granulate changeover unit which separates the dyed plastic granulate from the undyed plastic granulate is disposed in a conveying direction downstream of the underwater pelletizing installation. The dyed plastic granulate is separated from the pelletizing water via a first separator installation, and the undyed plastic granulate is separated from the pelletizing water via a second separator installation. The separator installations are disposed so as to be mutually parallel. The device enables a simple, flexible and economical selective production of the dyed plastic granulate and the undyed plastic granulate.