Title:
ゴルフボール製造方法
Document Type and Number:
Japanese Patent JP4112327
Kind Code:
B2
Abstract:
A golf ball is provided which contains a core and a cover. In the forming of the cover, two half shells made from a thermoplastic resinous composition are used to cover the core, the composite is put in a spherical mold, then, the mold is clamped. Thereafter, the thermoplastic resin where it is heated and pressurized at a pressure of 5 kgf/cm2 to 50 kgf/cm2, and the excess thermoplastic resin composition flows out of the spherical cavity. Subsequently, the thermoplastic resin composition is heated in the spherical cavity and is pressurized at a pressure of 70 kgf/cm2 or more whereby the cover is formed. The total volume of the two half shells is 105% to 120% of the volume of the cover.
Inventors:
Keiji Moriyama
Takashi Sasaki
Satoshi Kato
Tsutomu Heiyuu
Masaaki Kikuchi
Takashi Sasaki
Satoshi Kato
Tsutomu Heiyuu
Masaaki Kikuchi
Application Number:
JP2002285157A
Publication Date:
July 02, 2008
Filing Date:
September 30, 2002
Export Citation:
Assignee:
sri sports corporation
International Classes:
A63B45/00; A63B37/04; A63B37/12; B29C43/02; B29C43/14; B29C43/18; B29C43/52
Domestic Patent References:
| JP2002263221A |
Foreign References:
| WO2000059582A1 |
Attorney, Agent or Firm:
Kengo Oka