Patent ID: 8882490
Filing Date: 2014-11-11
Classification: B23P,B29C,B29K,B29L,Y10T

Abstract:
1. An injection molding cavity for molding a golf ball layer, comprising: a cavity for defining a golf ball layer, the golf ball layer comprising a thickness that corresponds to a space defined by the cavity; a metal surface layer surrounding the cavity; an insulating layer surrounding the metal surface layer; a metal cavity base configured to house the cavity, metal surface layer, and insulating layer; the insulating layer having a heat conduction coefficient that is less than the heat conduction coefficient of the metal surface layer and metal cavity base; a plurality of bores extending through the base, insulating layer, and metal surface layer; vent pins and core pins extending through the bores, the core pins projecting into the cavity and configured to support a golf ball at the center of the cavity to form a cover layer mold cavity between the golf ball and metal surface layer; and the metal surface layer has projections extending outwardly from the cavity along at least part of the length of each bore and surrounding a corresponding part of a respective pin.