Patent ID: 6521161
Filing Date: 2003-02-18
Classification: A63B,B29C,B29K,B29L

Abstract:
A method for manufacturing golf balls which comprises vulcanization by press molding of a layer of a core of a multi-piece solid golf ball or a one-piece or a solid center of a wound-string golf ball, said method comprising:charging a material into a press mold having an upper mold and a lower mold, both upper and lower molds being defined by a plurality of adjacent partial molds, wherein each of the partial molds has a mating face and 6 to 20 grooves arranged in a radius direction of the mating face of each partial mold; and closing the press mold with the charged material therein by bringing the upper and lower molds together and vulcanizing the charged material between the closed upper and lower molds, thereby causing spews of the charged material to come out of each of the closed partial molds through the grooves, wherein each spew does not connect and unify with any other spew.