Golf ball mold and golf ball manufacturing method
AssigneeBridgestone Sports Co., Ltd.
InventorsKatsunori SATO, Yusuke Tanaka
Life of this patent
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Abstract
A vertically separating two-part golf ball mold having a spherical cavity, support pins and support pin holes for disposing a core in the cavity and vent pins and vent pin holes is designed so as to reduce flash formation, allow gases generated during molding to reliably escape to the exterior and enable golf balls having a good surface state to be obtained without lowering the ball durability.
Claims10
A vertically separating two-part golf ball mold comprising a spherical cavity, a plurality of support pins and support pin holes for disposing a core within the spherical cavity and one or more vent pin and vent pin hole, wherein the pin holes for the support pins have a clearance that allows gases generated within the spherical cavity during injection molding to be released to the exterior, the vent pins are located inward from where the support pins located outermost as seen from poles of the spherical cavity are positioned, the vent pin holes and support pin holes have a shortest distance therebetween of 0.20 mm or less, and the sum of the total area of the clearances between the vent pins and vent pin holes and the total area of the clearances between the support pins and support pin holes is 1.00 mm2 or more.
Dependencies are inferred from the claim text.