| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a foamed molding previously molded in a required shape by enabling easy setting of an expansion ratio. SOLUTION: The method for manufacturing the foamed resin molding comprises the steps of sealing a thermoplastic resin 12 in a pressure container 10, then supplying a supercritical fluid of carbon dioxide from a supply source 14 to the container to impregnate the resin with the fluid, heating the resin to an intrinsic crystallization temperature Tc or higher, and then opening the container to expansion foam the resin. The method further comprises the steps of filling the resin in a mold 20 having a cavity 24 and perforating a fluid introducing/escaping hole, clamping the mold, sealing the mold in the container, contacting the fluid supplied from the supply source to the container with the resin via the hold to impregnate the resin with the fluid, heating the resin to the crystallization temperature or higher, then opening the container to expansion foam the resin, specifying a profile of the resin in the cavity, cooling the mold, and then releasing the molding from the mold to manufacture the final molding 22 foamed from the resin.
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