Screw machine and method for the processing of material to be processed

US10882015B2 · kind B2 · utility

Assignee

• COPERION GMBH · DE

Inventors

• Sören Welb · Ilsfeld, DE
• Ulrich Conrad · Elze, DE
• Peter Munkes · Stuttgart, DE

Key dates

• Filing date: Sep 27, 2016
• Grant date: Jan 5, 2021
• Expiry date: Aug 3, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/6803
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A screw machine includes an inductive heating device for the processing of material to be processed. The inductive heating device is used to heat the material in a heating zone. In the heating zone, at least one housing portion is made of an electromagnetically transparent material at least partly, the material being non-magnetic and electrically non-conductive, whereas at least one treatment element shaft is made of an electrically conductive material at least partly. During the processing of the material, the inductive heating device generates an alternating magnetic field that produces eddy current losses in the at least one treatment element shaft, the eddy current losses leading to a temperature increase of the at least one treatment element shaft. The material is heated on the at least one heated treatment element shaft, in particular until it melts. The screw machine allows a simple and efficient melting of the material, with the result that a mechanical energy input and a resulting wear of the screw machine can be reduced significantly.