Patent · US Expired

Method of carrying out continuous preparation processes on tightly meshing extruders rotating in the same sense

US6042260A · kind A · utility

21Cited by

3References

8Claims

0Family size

Assignee

Krupp, Werner & Pfeiderer GmbH · US

Inventors

Peter Heidemeyer · Kornwestheim, DE
Erwin Haring · Stuttgart, DE
Rainer Munz · Schorndorf, DE
Rainer Herter · Waldwick, US
Ulrich Burkhardt · Stuttgart, DE

Key dates

Filing date	Mar 27, 1998
Grant date	Mar 28, 2000
Priority date	—
Expiry date	Mar 27, 2018

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a method of carrying out continuous preparation processes on tightly meshing extruders rotating in the same sense such as twin-screw and multi-shaft screw-type extruders, the extruder is operated at a screw speed of rotation of at least 800 rpm, accompanied with a simultaneous increase of the so-called "torque density" (M.sub.d /a.sup.3) of at least 11 Nm/cm.sup.3 and a volumetric ratio (Da/Di) of at least 1.5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.