Title:
ゴルフボール製造方法
Document Type and Number:
Japanese Patent JP4330958
Kind Code:
B2
Abstract:
A ball body is formed with a mold having upper and lower mold half. Dimples 16 having a shape inverted from the shape of the pimples of the mold are formed on the ball body. The dimples 16 in the vicinity of the equatorial line have a size in the meridional direction D 1 being greater than a size in the latitudinal direction D 2. The difference between the size in the meridional direction D 1 and the size in the latitudinal direction D 2 is 0.01 mm or greater and 0.50 mm or less. By grinding the ball body in the vicinity of the equatorial line, a flash generated on the seam resulting form the mold is removed. According to the grinding, the size in the meridional direction of the dimple 16 is reduced, and thus, plane shape of the dimple becomes closer to a perfect circle.
Inventors:
Seiichiro Endo
Takahiro Sajima
Takahiro Sajima
Application Number:
JP2003306309A
Publication Date:
September 16, 2009
Filing Date:
August 29, 2003
Export Citation:
Assignee:
sri sports corporation
International Classes:
A63B37/00; A63B37/04; A63B45/00; B29C37/02
Domestic Patent References:
| JP63158075A | ||||
| JP2001187172A | ||||
| JP1147310A |
Foreign References:
| US5356150 |
Attorney, Agent or Firm:
Kengo Oka