METHOD FOR MANUFACTURING GOLF BALL MOLDING DIE MASTER, GOLF BALL MOLDING DIE MASTER, GOLF BALL MOLDING DIE AND GOLF BALL

摘要

PROBLEM TO BE SOLVED: To inexpensively manufacture a variety of surface shapes on a surface by cutting the surface of a pure master having a hemispherical surface with an end mill and forming recesses for dimpling the surface of the pure master, and improve the aerodynamic characteristics and carrying performance.;SOLUTION: The golf ball molding die master has recesses for dimpling the surface of the pure master having a hemispherical surface. The die master is manufactured so as to allow recesses for forming dimples to be formed by cutting by using the end mill.;COPYRIGHT: (C)2004,JPO&NCIPI