METHOD AND MOLD FOR EXTRUSION MOLDING OF THERMOPLASTIC RESIN TUBE

PROBLEM TO BE SOLVED: To prevent a temperature difference between the surface of a mandrel and an outer die from becoming large. SOLUTION: In a method for extrusion molding of a thermoplastic resin tube wherein thermoplastic resin is extruded in the shape of the tube from a circular gap between a ma...

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Bibliographische Detailangaben
1. Verfasser:	KOMATSU TOMIO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS 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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent a temperature difference between the surface of a mandrel and an outer die from becoming large. SOLUTION: In a method for extrusion molding of a thermoplastic resin tube wherein thermoplastic resin is extruded in the shape of the tube from a circular gap between a mandrel 12 and an outer die 11, a mold 1 for extrusion molding which is equipped with the mandrel 12 provided with a through hole 121 located in proximity to the outer surface of the mandrel 12, one end of the through hole 121 of the mandrel 12 being made to communicate with a pass hole 131 provided in a spider 13 and the other end being opened in the end face of the mandrel 12, is used and the mandrel 12 is cooled by making a fluid flow through the through hole 121 thereof.