Mold for injection-molding a golf ball, and golf ball manufactuing method
AssigneeBridgestone Sports Co., Ltd.
InventorsAtsuki KASASHIMA, Yoshio MOTEGI
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Abstract
The invention provides a mold for injection-molding a golf ball, which mold has a cavity inner wall with a vertical diameter connecting both poles in a vertical direction thereof that is longer than a horizontal diameter connecting both poles in a horizontal direction thereof. A method of manufacturing golf balls using such a mold is also provided. The use of this mold eliminates molding problems that arise when molding the outermost cover layer of a golf ball, enabling the cover to be stably molded and also making it possible to easily and reliably obtain golf balls of high symmetry in which a cover of uniform thickness has been formed.
Claims4
A mold for injection-molding a golf ball, comprising a plurality of mold sections which have at least a parting surface that is based on a golf ball equator-based mold parting line and removably mate to form an interior cavity for molding the golf ball, the cavity having an inner wall with a plurality of dimple-forming protrusions provided thereon,
- wherein at least four resin gates are formed along the parting surface that is based on a golf ball equator-based mold parting line, and
- the inner wall has a vertical diameter connecting two poles of the cavity in a vertical direction thereof and a horizontal diameter connecting two poles of the cavity in a horizontal direction thereof, the vertical diameter being longer than the horizontal diameter.
Dependencies are inferred from the claim text.