Patent ID: 6238194
Filing Date: 2001-05-29
Classification: B29C,B29L

Abstract:
An injection mold for golf balls comprising:a mold having a spherical cavity having an equator and opposite poles,a mold parting plane extending substantially coplanar with the equator of the cavity,a plurality of molding material injecting gates arranged in the mold at or near positions around the cavity equator at equal intervals for injecting a molding material into said cavity therethrough,an additional pair of molding material injecting gates arranged at the cavity poles, anda plurality of retractable core support pins each of which is received in a hole disposed through the mold, wherein a gap is formed between the hole and the pin permitting gases to be quickly discharged from within the cavity during molding, and each core support pin received in the hole is positioned at a portion at which a diffused molding material injected from the gate at each pole merges with molding materials injected from the adjacent gates at the cavity equator and flowing on a weld line formed therewith.