Patent · US Active

Device and method for producing a dyed and an undyed plastic melt

US11440221B2 · kind B2 · utility

2Cited by

13References

20Claims

0Family size

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	Sep 13, 2022
Priority date	—
Expiry date	Dec 11, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2105/0032
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A device for producing a dyed plastic melt and an undyed plastic melt includes a multi-shaft screw extruder, a first metering installation, a second metering installation, and a control installation for selecting between a first operating mode for producing the dyed plastic melt and a second operating mode for producing the undyed plastic melt. The first metering installation serves for feeding an undyed plastic material through a first infeed opening into a housing of the multi-shaft screw extruder, and the second metering installation serves for feeding at least one color granulate through a second infeed opening into the housing. The plastic material is fed exclusively by way of the first infeed opening such that residual color granulate or dyeing agent contained therein, respectively, which is still located in the second metering installation or in the region of the second infeed opening does not contaminate the undyed plastic melt.

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