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 st...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CHAPMAN PETER G, HENWOOD JAMES V, JARVENKYLA JYRI, MACOVAZ GEORGE
Format:	Patent
Sprache:	eng
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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