发明授权
- 专利标题: Method for the production of golf ball
- 专利标题(中): 生产高尔夫球的方法
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申请号: US11157808申请日: 2005-06-22
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公开(公告)号: US07622065B2公开(公告)日: 2009-11-24
- 发明人: Koichi Fujisawa , Kazuhiko Isogawa
- 申请人: Koichi Fujisawa , Kazuhiko Isogawa
- 申请人地址: JP Kobe-shi
- 专利权人: SRI Sports Limited
- 当前专利权人: SRI Sports Limited
- 当前专利权人地址: JP Kobe-shi
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2004-224296 20040730
- 主分类号: B29C45/14
- IPC分类号: B29C45/14
摘要:
Mold 12 has an upper mold half 14 and a lower mold half 16. Pellet 34 obtained by cutting a resin composition into a predetermined size is placed into the mold 12. One pellet 34 is put on one recessed part 24. The pellet 34 has an incipient fluidization temperature T of 50° C. or greater and 150° C. or less. Weight of the pellet 34 is 1.4 g or greater and 2.0 g or less. Through clamping, the pellet 34 is compressed, and heated to allow the resin composition to flow thereby forming a preforming material. Difference (Tp−T) between the molding temperature Tp and the incipient fluidization temperature T is equal to or less than 70° C. Percent Pp of change in the weight average molecular weight Mp of the preforming material to the weight average molecular weight M of the pellet 34 is equal to or greater than −30%. Cover is formed with this preforming material. Percent Pc of change in the weight average molecular weight Mc of the cover to the weight average molecular weight M of the pellet 34 is equal to or greater than −30%.
公开/授权文献
- US20060022382A1 Method for the production of golf ball 公开/授权日:2006-02-02