Foamed synthetic resin molded body and method for producing same

摘要

Provided is a method for producing a foamed synthetic resin molded body. In this method, in the case where a hole-like portion is a through hole, when foam molding is performed, the occurrence of molding defects such as voids at the periphery of the hole-like portion can be sufficiently prevented or suppressed without forming a burr portion that closes the hole-like portion. Also in this method, in the case where the hole-like portion is a non-through hole, the occurrence of molding defects such as voids at a bottom portion of the hole-like portion can be sufficiently prevented or suppressed.

主权项

1. A method for producing a foamed synthetic resin molded body having a through hole in an outer surface thereof using a mold for foam molding that includes at least a first die and a second die,
wherein a projection for forming the through hole is provided on a cavity inner surface of the first die, wherein, when the mold for foam molding is clamped, in the mold for foam molding, a tip end surface of the projection in a projecting direction opposes a cavity inner surface of the second die with a predetermined gap formed therebetween, and wherein, when the foamed synthetic resin molded body is formed by foam molding, gas in the mold for foam molding is introduced into a space between the tip end surface of the projection and the cavity inner surface of the second die by gas introduction means, wherein a portion of the through hole is not covered by the gas introduction means.