Patent ID: 7713455

Claim:
A method for manufacturing a molding which comprises a core and an outer layer by using a compression molding apparatus having an upper punch and a lower punch which are arranged in the vertical direction of a die, both of the upper punch and the lower punch having a double structure comprising a center punch and an outer punch surrounding the outer periphery of the center punch, and being slidable and capable of a compressing operation; the method comprising: a core supply step of supplying molding material for the core into a space defined above the lower center punch and surrounded by the lower outer punch; a core molding step of compression-molding the molding material for the core supplied in the preceding step; an outer layer supply step of supplying molding material for the outer layer into a space defined above and around the core molding in the die molded in the preceding step until a tip of the lower center punch finally takes a position protruding from a tip of the lower outer punch by lowering the lower outer punch; and a whole molding step of compression-molding the core molding and the molding material for the outer layer with the tips of the lower outer punch and the lower center punch aligned with each other, wherein an outer layer supply step of supplying the molding material for the outer layer into the space defined above the lower center punch and surrounded by the lower outer punch is not performed prior to the core supply step.