METHOD AND APPARATUS FOR CONTROL OF PLASTICS TUBE ORIENTATION PROCESS

A continuous process for producing oriented plastic tube is disclosed having the steps of extrusion (12) of a tube to an initial extruded diameter, temperature conditioning (18), diametrical expansion (20) and cooling (30), characterised by control of the circumferential draw ratio by the step of ad...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	JARVENKYLA, JYRI, CHAPMAN, PETER GLANVILLE, HENWOOD, JAMES VICTOR, MACOVAZ, GEORGE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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