MANUFACTURE OF OLEFIN RESIN FOAM MOLDED MATERIAL

摘要

PURPOSE:To shorten cooling time to a large extent by suck moving a fixed side contact surface of a molded product to a movable side mold and exposing said surface to atmosphere, and then clamping again and immediately opening the mold and releasing as it is. CONSTITUTION:Both drain valves 28 and 29 are clamped before releasing and a movable side vacuum valve 26 is opened to vaccumize, while a fixed side air valve 23 is opened and pressurized. The movable side air valve 23 is closed after about 3 - 8 seconds and mold opening is carried out, and a molded product is sucked and moved to the side of movable side inner mold 13 and mold opening is discontinued in such a manner that a starting section (a) of the molded product may not slip off the fixed side inner mold 12. The molded product can easily be released without pin cracking out of the fixed side inner mold 12 by carrying out said slow mold opening operation. Thus, the cooling time can be shortened to a large extent for releasing to increase molding productivity.