PURPOSE: To make molding under low pressure possible, to decrease variability of plate thickness, dimensional variation and warp and to improve heat resistance, by putting air-tightly a laminated body, where metal foils are being laminated on one or both sides of a prepreg laminated body, in a plastic package, by keeping the inside of the plastic package to a reduced pressure and by pressing them set between hot plates under heating.
CONSTITUTION: Metal foils 6 such as cupper foil are laminated on one or both sides of a prepreg laminated body 4 obtained by laminating a plurality of a prepreg 1 and mold plates 7, 7 are piled up on the upper and bottom surfaces of this laminated body 5. The whole laminated body is thereafter put into a plastic package 2, where the air is then evacuated to get a state of reduced pressure. This package 2 places between a pair of cushion materials 8, 8 are put on a carrier plate 9 and the whole laminated body is then set between a pair of hot plates 3, 3 and the laminated body 5 in the package 2 is molded under heating and pressing.
NAKAI MICHIO
FUKUMOTO YASUFUMI
AKAMATSU TOSHIYUKI
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