MANUFACTURE OF EXTRUSION MOLDED FORM

PURPOSE: To reduce the facility cost and to manufacture an extrusion molded form with high material yield by alternately supplying a thermoplastic elastomer material mixed with a foaming agent and a thermoplastic elastomer material mixed with no foaming agent from a common extruder to a material cha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YADA YUKIHIKO, SHIRAHATA ITARU
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 REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE: To reduce the facility cost and to manufacture an extrusion molded form with high material yield by alternately supplying a thermoplastic elastomer material mixed with a foaming agent and a thermoplastic elastomer material mixed with no foaming agent from a common extruder to a material channel common for a molding die. CONSTITUTION: A method for manufacturing an extrusion molded form 11 comprises the step of alternately continuously providing a foamed part 9 and a non-foamed part 8 longitudinally. The method further comprises the steps of intermittently supplying a foaming agent to a thermoplastic elastomer material P to be fed to the material feed passage of an extruder 19, thus alternately supplyinf a thermoplastic elastomer material PA mixed with the agent and a thermoplastic elastomer material PB mixed with no foaming agent to the material channel 16 of a molding die 15, and sequentially extruding it via the molding passage 17 of the die 15 from an extrusion port 18, thereby alternately continuously providing the parts 9 and 8 longitudinally to provide the form 11.