Patent ID: 8608593

Claim:
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 3 /sec) and an injection time T (sec) of an injection molding machine; 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 3 /sec) of the injection molding machine; and the injection time T (sec) of the injection molding machine, is equal to or greater than 500 and equal to or less than 1000; 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 3 /sec and equal to or less than 500 cm 3 /sec.