Method and machine for producing a single-walled or multi-walled tubular thermoplastic body

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United States of America Patent

PATENT NO 11951669
APP PUB NO 20210001533A1
SERIAL NO

16980784

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Abstract

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In a method for producing at least a single-walled tubular thermoplastic body in a machine, a nozzle head extrudes at least one tubular preform. The preform is expanded to a predefined dimension in a transverse direction and to a predefined shape in an expansion process using an expanding mandrel, the preform remaining open at the top and bottom. When the at least one preform has cooled off, the expanding mandrel is changed into a non-expanded state and the at least single-walled tubular body is removed from the machine.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Richter, Günter Bad Honnef, DE 7 21

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