INJECTION FOAM MOLDING METHOD AND FOAMED MOLDED PRODUCT

PROBLEM TO BE SOLVED: To provide an injection foam molding method for molding a foamed molded product having a surface free from air bubbles, excellent in appearance and suppressed in the occurrence of a local sink or warpage. SOLUTION: This injection foam molding method includes a process (A) for p...

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1. Verfasser:	KAYANO YOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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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creator	KAYANO YOSHIHIRO
description	PROBLEM TO BE SOLVED: To provide an injection foam molding method for molding a foamed molded product having a surface free from air bubbles, excellent in appearance and suppressed in the occurrence of a local sink or warpage. SOLUTION: This injection foam molding method includes a process (A) for plasticizing/melting a thermoplastic resin by a resin plasticizing/melting means to dissolve gas in the molten thermoplastic resin, a process (B) for injecting the molten thermoplastic resin after metering the same, a process (C) for suppressing the foaming of the gas by applying pressure to the molten thermoplastic resin in a cavity or redissolving the gas foamed in the molten thermoplastic resin in the molten thermoplastic resin, a process (D) for foaming the gas on the basis of the lowering of pressure in the thermoplastic resin within the cavity caused by the volumetric reduction accompanied by the cooling/solidification of the thermoplastic resin in the cavity and a process (E) for opening a fixed mold part and a movable mold part to take out a foamed molded product. COPYRIGHT: (C)2005,JPO&NCIPI
format	Patent
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language	eng
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subjects	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 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
title	INJECTION FOAM MOLDING METHOD AND FOAMED MOLDED PRODUCT
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