INJECTION MOLDING METHOD OF RUBBER MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide an injection molding method of a rubber molded body capable of simply demolding an unvulcanized rubber molded body. SOLUTION: A mold is opened during a period when the bead filler 1b molded in the cavity of the mold is in an unvulcanized state and a film F is bonded to the exposed outer surface of the bead filler 1b left in a lower mold 7. The surface roughness Ra(F) of the film F is set so that the relation with the surface roughness Ra(L) of the cavity surface 7a of the lower mold 7 satisfies Ra(L)/Ra(F)≥20. At the time of demolding, the film F is separated from the lower mold 7 to take out the bead filler 1b bonded to the film F. COPYRIGHT: (C)2007,JPO&INPIT