MOLD FOR FORMING GOLF BALL, METHOD TO MANUFACTURE GOLF BALL WITH SAME, AND GOLF BALL MANUFACTURED USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a golf ball in which, in the process of grinding the entire ball surface after molding, the size of the dimples is maintained and the designed surface occupation ratio thereof is achieved. SOLUTION: A mold for forming a golf ball has at least two body parts, a cavity 4 being formed within the mold by the joining of the at least two body parts, the body part comprising a cavity wall surface 7 which has a spherical surface shape with the center thereof being at the center of the cavity and dimple-forming protrusions 6 provided on the cavity wall surface, the dimple-forming protrusions 6 being connected to the cavity wall surface 7 at an angle of about 60 or more degrees in a region L from about 3μm to about 20μm from the cavity wall surface 7. COPYRIGHT: (C)2011,JPO&INPIT