Patent ID: 8608593
Filing Date: 2013-12-17
Classification: A63B,B29C,B29L

Abstract:
1. A method for manufacturing a golf ball, the method comprising the steps of: obtaining a core; preparing a mold having a cavity and placing the core into the cavity; providing a resin composition with a melt fluidity M (g/10 min), which is measured at 190° C.; setting an injection rate V (cm balancing the melt fluidity M, the injection rate V and the injection time T so as to satisfy that the product (M*V*T) of: the melt fluidity M (g/10 min) of the resin composition, which is measured at 190° C.; the injection rate V (cm discharging the resin composition from the injection molding machine; and injecting the discharged resin composition between the cavity and the core to faun a cover with a thickness of 0.2 mm or greater and 1.0 mm or less, wherein the injection time T is equal to or longer than 0.05 sec and equal to or shorter than 0.15 sec, and the injection rate V is equal to or greater than 250 cm