The Yokohama Rubber Co., Ltd.

Masahiro Kato

Takaharu Okumoto

Tetsuya Hayashi

A metal mold for producing a wood type golf club head, including an upper metal mold member having a molding recess including a surface for molding an upper end portion of a shaft bore in a club head, a lower metal mold member having a molding recess including a surface for molding a sole of the club head, a shaft bore molding upper pin fitted firmly in the portion of the surface of the upper metal mold member which corresponds to an upper end portion of the shaft bore, so as to project to the inner side of the metal mold, and a shaft bore-molding lower pin fitted firmly in the lower metal mold member so as to project to the inner side of the metal mold, the upper and lower pins being arranged coaxially in an opposed state via a narrow clearance, the direction in which the upper and lower pins are arranged crossing perpendicularly the direction in which the joint surfaces of the upper and lower metal mold members extend.

Metal mold for producing wood golf club head and method of producing the

A golf club head having a channel formed in the back on the heel side of the club head main body that extends from the upper end of the hosel portion to the underside of a sole portion. A cover member molded separately is mounted over the opening of the channel to close it whereby a shaft fit hole is formed for receipt of the club's shaft by the inner surface of the cover member and a part of the inner surface of the channel.

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Zama, Japan

Masahiro Kato