Patent ID: 6283745
Filing Date: 2001-09-04
Classification: B29C

Abstract:
An injection mold for molding a spool having flanges at both ends of a shaft, said flanges each having an inner wall surface with a groove therein, said groove being concentric with said shaft, said injection mold comprising:two mold members for molding an outer periphery of the shaft of said spool, said inner wall surfaces of said flanges, and said grooves; anda pair of mold members for molding outer wall surfaces of said flanges;wherein said two mold members for molding the outer periphery of the shaft of said spool, the inner wall surfaces of said flanges and the grooves are formed of a material having relatively low thermal conductivity, and said pair of mold members for molding the outer wall surfaces of said flanges are formed of a material having relatively high thermal conductivity at least at portions thereof that mold the outer wall surfaces of said flanges.