Rigid polyurethane foam product formed using mold

摘要

A rigid polyurethane foam molded product which is excellent in dimensional accuracy and also in stability of the dimensional accuracy can be provided by allowing reaction heat generated during rigid polyurethane raw material is foamed to effectively escape to the outside. The molded product 1 is produced by injecting the rigid polyurethane raw material into a mold and foaming the rigid polyurethane raw material. The molded product 1 is provided at its volume zone 2 with a reaction heat relief portion composed of a pit or a through hole communicating with an outer surface 3 of the molded product 1. The ratio of the volume of the reaction heat relief portion to the apparent volume of the molded product is from 0.01 to 0.5. The molded product is suitably adopted to an energy absorbing member.