IN-MOLD FOAM MOLDING METHOD AND IN-MOLD FOAM MOLDED PRODUCT OF POLYOLEFIN-BASED SYNTHETIC RESIN

摘要

PROBLEM TO BE SOLVED: To provide an in-mold foam molding apparatus and an in-mold foam molding method of a polyolefin-based synthetic resin capable of shortening cooling time of the molded product, one of problems in such a new foam molding technique in order to realize a new foam molding apparatus wherein vents such as a core vent, a core vent hole or the like are eliminated from a surface of a mold. ;SOLUTION: Pre-expanded beads comprising polyolefin-based synthetic resin is filled in a molding space 4, and fused by heating with steam. When a molded product is cooled thereafter, the molded product is cooled while foamed resin pressures onto the molds 2 and 3 are successively measured with a surface pressure sensor. When the foamed resin pressures onto the molds 2, 3 become respectively a previously set pressure according to the molded product, cooling of the molded product is completed, the molded product is released from the mold. Thereafter, the molded product is set to a fixture, and a shape is stabilized.;COPYRIGHT: (C)2001,JPO