Patent ID: 7718107
Filing Date: 2010-05-18
Classification: B29C,B29L,Y10S

Abstract:
1. A method of manufacturing a golf ball comprising the steps of: putting a core in a mold including an upper mold half and a lower mold half and including a substantially spherical cavity and a plurality of gates, each of the upper mold half and the lower mold half containing a vent pin positioned on a pole, three to six support pins having latitudes θs of 45 degrees to 75 degrees, and at least three intermediate vent pins having latitudes θm of 45 degrees to 75 degrees, said intermediate vent pins being unmovable forward and backward with respect to the cavity; and injecting a molten polymer composition into the cavity through a gate while discharging air present in the cavity from a clearance provided by the intermediate vent pins, wherein every gate is present on the parting line, and the molten polymer composition passing through the gate is fluidized toward the pole from the parting line and wherein a difference between an inside radius of the cavity and a radius of the core at the injecting step is 0.3 mm to 0.8 mm.