| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a multilayer foam molded body wherein an outer layer is a foam layer in which micro foaming cells are dispersed uniformly, and an inner layer is an unfoam layer. SOLUTION: An unfoam molded body P<SB>1</SB>is arranged in a cavity of both divided dies 1a, 1b and a mold bundle is carried out. The dies are heated by a heater 2a and a heater 2b, and at the same time, a valve for supply 11a is opened to charge a supercritical fluid generated at a supercritical fluid generating device 10 into the cavity through a supply port 7. By maintaining a pressure inside the cavity at a supercritical pressure or more, the desired region forming the foam layer of the unfoam molded body P<SB>1</SB>is impregnated with the supercritical fluid (gas for foaming). Then, the pressure inside the cavity is relieved, and the rapid pressure reduction makes foam cell nuclei caused by the impregnated supercritical fluid grow up, and forms the foam layer wherein the micro foam cells are dispersed to expand to a shape copied after the cavity. COPYRIGHT: (C)2007,JPO&INPIT
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