| 摘要 |
A method for producing a golf ball, including a spherical elastic inner layer having a large number of projections and a thermoplastic resin outer layer covering the inner layer, employs a mold comprising an upper mold and a lower mold with a spherical cavity formed in the inside and a parting surface provided at a position corresponding to an equator of the spherical cavity. A plurality of columnar support pins each have a tip width sufficient for supporting at least two projections on the inner layer, the pins elongating into the cavity reciprocally movably toward the parting surface. The inner layer is supported at the cavity center portion of the mold by the support pins, from above and below at the projection positions. An external layer resin is injected into the space between the inner layer and the cavity wall surface surface, forming the inner and outer layers. |
