BLOW MOLDING METHOD AND MOLD FOR BLOW MOLDING

摘要

PROBLEM TO BE SOLVED: To make the thickness of a parison uniform and to make the thickness of a blow molded article uniform by arranging a slide mold on the outer periphery of the mold and sucking the inside of the mold by sealing the inside of the mold by the slide mold. SOLUTION: The blow molding method and the mold for blow molding has a pair of slide molds 7 slidably arranged on the outer periphery of the molds 4, and a plurality of exhaust openings 6 for vacuum suction arranged in the wall portions 5 of the respective molds 4, and the parison 2 is sucked by sealing the molds by the respective slide molds 7 when closing the respective molds, thereby unnecessary elongation of the parison 2 is eliminated and the thickness of the blow molded article is uniformed. COPYRIGHT: (C)2009,JPO&INPIT