| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf ball production method which can reduce a percent defective. <P>SOLUTION: In the production of the golf ball, two half shells 10 and a core covered with the half shells 10 are placed into a mold die consisting of an upper and lower dice each having a spherical cavity and a thermoplastic resin composition is pressurized while being heated by the die clamping operation to make an excess of the thermoplastic resin composition flow out of the cavities. In the production method, a cover with a formal thickness of 0.3 mm or more to 1.0 mm or less is formed by the residual thermoplastic resin composition. In the production method, each of the half shells 10 shaped like a cup has a top part 11 and a side part 12 while the thickness Tt of the top part 11 is less than the thickness Ts of the side part 12 and the difference (Ts-Tt) between both should be 0.02 mm or more to 0.30 mm or less. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
