Patent ID: 7329376

Claim:
A method of making a golf ball comprising a core and a cover covering the core, the method comprising the steps of: (a) (i) clamping a half mold having a semi-spherical cavity and a male plug mold having a semi-spherical convex, followed by injection molding fluoroplastic from an inlet vent at the back of the half mold through a runner to form a fluoroplastic thin film on the surface of the half mold, (ii) incorporating a pair of the two half molds having the fluoroplastic thin film, which is composed of an upper mold and a lower mold, into a core mold, (iii) placing a core composition in the cavity, (iv) press molding the core composition in the core mold through the fluoroplastic thin film to form a spherical core, and (b) covering the core with a cover.