Patent ID: 9475219
Filing Date: 2016-10-25
CPC Classification: B29C

Claim Text:
1. A method for molding foamable resin, when foamable resin is injected into a cavity formed by a first mold and a second mold and the resin is foamed, the method comprising: disposing a frame-like nest as a part of a surface of the cavity, the nest being set at a temperature lower than a set temperature of one of the first mold and the second mold and having a recessed portion communicating with the cavity; injecting molten foamable resin into the cavity, and solidifying the resin on the nest more quickly than on an area other than a contact area with the nest so as to form an initial solidified portion acting as a barrier of a molten resin flow, the initial solidified portion being disposed upstream and downstream of the recessed portion relative to the flow of the molten resin, and foaming of unsolidified foamable resin continuing after the initial solidified portion is formed; and compressing the molten resin in a final solidified portion in the recessed portion so as to reduce a volume of generated gas bubbles in the resin in the final solidified portion, and the resin then being solidified by cooling, by pressing a movable core into unsolidified resin in the recessed portion after solidifying the resin in the initial solidified portion, the movable core being set at a temperature lower than the set temperature of one of the first mold and the second mold.