METHOD FOR PRODUCING THICK-WALLED MOLDING

PROBLEM TO BE SOLVED: To provide a method for producing a thick-walled molding in which a thermoplastic resin can be injection-molded at a low temperature, plasticization is stabilized, a molding cycle can be shorten, and a sink is made small. SOLUTION: In the method for producing the thick-walled m...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAGUCHI YUKIO, TAKAHASHI HARUNORI
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a thick-walled molding in which a thermoplastic resin can be injection-molded at a low temperature, plasticization is stabilized, a molding cycle can be shorten, and a sink is made small. SOLUTION: In the method for producing the thick-walled molding, a lubricant is adhered to the surfaces of thermoplastic resin granules, and the cylinder temperature of an injection molding machine is adjusted at a temperature which is higher by 50-90°C than the glass transition temperature of the thermoplastic resin to carry out injection molding. The thermoplastic resin is preferably a methacrylic resin. COPYRIGHT: (C)2009,JPO&INPIT