Patent ID: 7087201
Filing Date: 2006-08-08
Classification: B29C,B29K,B29L

Abstract:
1. A process for producing a golf ball comprising: a first step wherein generally hemispherical half shells are formed comprising a thermoplastic resin composition, the half shells having a central part surrounded by a side part, central part having a boundary defined by a central angle of 10°–70°, the thickness of the central part being less than the thickness of the side part; a second step wherein a core covered by two of said half shells are placed into a mold comprising confronting portions both of which having a hemispherical cavity, in an open state of said mold; a third step wherein said mold is clamped, bringing said confronting portions together to form a spherical cavity; and a fourth step wherein a thermoplastic resin composition is compressed while being heated in the spherical cavity formed by the clamping, resulting in outflow of excess thermoplastic resin composition from the spherical cavity that cannot be accommodated by the volume of the spherical cavity, to form a cover having the nominal thickness of 0.3 mm or greater and 1.0 mm or less with thermoplastic resin composition remaining in the spherical cavity.