| 摘要 |
A polyurethane covered golf ball is made by allowing the polyurethane cover stock material to partially cure in an open mold (10) and subsequently molding a golf ball product. The molding is done by first molding a smooth-surfaced golf ball product (32) in a smooth-walled fixed-pin mold (10) and then, in a second molding step, using a compression mold (50) to impart dimples onto the smooth-surfaced golf ball product. Between the two molding steps an intermediate curing step is employed. The initial curing time in an open mold and the intermediate curing time between the two molding steps is minimized through the use of a sufficient amount of catalyst, by keeping the smooth mold at an elevated temperature, or by using the fast-reacting chemical components. |
