Patent ID: 6659886
Filing Date: 2003-12-09
Classification: A63B,B29C,B29L

Abstract:
In connection with a golf ball comprising a core, a resin layer enclosing the core, and a cover enclosing the resin layer,a mold composed of a pair of an upper mold half and a lower mold half and having a cavity wall defining a spherical cavity, the core being placed in the cavity to define a space for molding the resin layer, wherein the cavity wall formed of the upper mold half and lower mold half is provided with a plurality of projections extending radially toward the geometric center of the cavity so as to precisely place the core at the center of the cavity and to be not off-centered during injection by the pressure of the injected resin compound, the total of the cross-sectional areas of the projections at their base divided by the surface area of the cavity wall is up to 2%, and the total of the volumes of the projections divided by the volume of the space is up to 4%.