METHOD FOR MOLDING RESIN PRODUCT BY GAS-ASSIST MOLDING METHOD AND MOLDING APPARATUS

PROBLEM TO BE SOLVED: To provide a method for molding a resin product in which the wall thickness around the hollow part of a gas channel is uniform longitudinally in a gas-assist molding method and an apparatus for the method. SOLUTION: In the longitudinal direction of a part corresponding to the g...

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1. Verfasser:	MAKI RENJI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES PERFORMING OPERATIONS 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 WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for molding a resin product in which the wall thickness around the hollow part of a gas channel is uniform longitudinally in a gas-assist molding method and an apparatus for the method. SOLUTION: In the longitudinal direction of a part corresponding to the gas channel of the mold 20 of a molding apparatus 10 by a gas-assist molding method, sets of temperature control means 30, each of which comprises two heaters 32, 32 and one temperature sensor are installed and is connected to a control part 38 having a data input part 36. Since the temperature of the part corresponding to the gas channel of the mold is controlled to increase gradually with the distance from a gas inlet, the fluidity of a molten resin is kept uniform in the longitudinal direction of the mold 20. As a result, a hollow part with a uniform wall thickness can be molded.