Underwater pelletizing die plate

US5679380A · kind A · utility

Assignee

• Werner & Pfleiderer GmbH · DE

Inventors

• Rainer Munz · Schorndorf, DE
• Rainer Sauter · Waiblingen, DE

Key dates

• Filing date: Mar 28, 1996
• Grant date: Oct 21, 1997
• Expiry date: Mar 28, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2793/009
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In an underwater pelletizing die plate or an extruder for the pelletizing of thermoplastics, the front face of the die plate, which is provided with a wearing protection layer and over which pass the pelletizing knives, being disposed under water, and heat isulation means being provided on the pelletizing die plate, good axial insulation is to be achieved, accompanied by uniform temperature distribution in the radial direction, it being provided to this end that an insulating layer is disposed between the external upper side of the actual pelletizing die plate and the wearing protection layer, the wearing protection layer being positioned, relative to the insulating layer, with radial play and without axial pressure or with little axial pressure, respectively.