Method for manufacturing multi-piece golf ball and a mold

摘要

A method for manufacturing a multi-piece golf ball provided with a core material and an outer layer molded on the surface of the core material, which comprises the steps of: i) simultaneously molding a pair of semispherical outer-layer-pieces that are composed of a composition containing semi-vulcanized rubber; ii) inserting a separately molded core material between the pair of outer-layer-pieces, and bringing the mouths of the pair of outer-layer-pieces into contact; and iii) vulcanizing the rubber contained in the outer-layer-pieces by press molding to obtain an outer layer that comprises a rubber composition on the surface of the core material.