Patent ID: 7294295

Claim:
A method of manufacturing a molded product of foamed resin by injecting a molten resin into a mold and foaming the resin in the mold, comprising: injecting supercritical fluid into a molten resin; injecting the molten resin into a mold while keeping a surface of the mold at a temperature equal to or higher than a heat distortion temperature of the resin; and supplying a cooling medium in a cooling channel defined in said mold to cool and solidify the resin, wherein the supplying of the cooling medium is started less than 10 seconds after the filling of said mold with a predetermined quantity of the resin is completed, whereby as a result of the supplying of the cooling medium, a molded foamed resin product having substantially no cells formed in its surface is produced while being foamed by the supercritical fluid inside.