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

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12076904
APP PUB NO 20200139606A1
SERIAL NO

16325999

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Abstract

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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, 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 feeds an undyed plastic material through a first infeed opening into a housing of the multi-shaft screw extruder, and the second metering installation feeds at least one dyeing agent through a second infeed opening into the housing. In order for the undyed plastic melt to be produced, the plastic material is fed exclusively via the first infeed opening such that residual dyeing agent 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.

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Patent Owner(s)

Patent OwnerAddress
COPERION GMBH70469 STUTTGART

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Conrad, Ulrich Elze, DE 19 115
Hornberger, Heiko Hessigheim, DE 3 6
Kern, Norbert Tamm, DE 10 31
Schmudde, Markus Murr, DE 7 7
Stöhrer, Bernhard Pleidelsheim, DE 3 6

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