Abstract: Provided is a method for manufacturing an iron golf club head by forging a single round rod member with a pair of dies to form, as a single piece, a body and a neck into which a shaft is to be inserted. The method includes: a first step of heating the single round rod member into a heated material; a second step of placing the heated material in the pair of dies; and a third step of forging the heated material placed in the pair of dies. In the third step, the heated material is prevented from flowing out from parting surfaces of the respective dies at a sole side of the body in the pair of dies, and the heated material blocked at the sole side in the pair of dies flows toward each of a toe of the body and the neck in the pair of dies.
Type:
Grant
Filed:
April 30, 2020
Date of Patent:
May 18, 2021
Assignees:
Mizuno Corporation, Chuo Industries, Ltd.
Inventors:
Kazuhiro Doi, Tetsuya Kanayama, Jun Yoshikawa
Abstract: Provided is a method for manufacturing an iron golf club head by forging a single round rod member with a pair of dies to form, as a single piece, a body and a neck into which a shaft is to be inserted. The method includes: a first step of heating the single round rod member into a heated material; a second step of placing the heated material in the pair of dies; and a third step of forging the heated material placed in the pair of dies. In the third step, the heated material is prevented from flowing out from parting surfaces of the respective dies at a sole side of the body in the pair of dies, and the heated material blocked at the sole side in the pair of dies flows toward each of a toe of the body and the neck in the pair of dies.
Type:
Grant
Filed:
March 27, 2018
Date of Patent:
June 23, 2020
Assignees:
Mizuno Corporation, Chuo Industries, Ltd.
Inventors:
Kazuhiro Doi, Tetsuya Kanayama, Jun Yoshikawa
Abstract: A golf club according to the present invention comprises a face portion (1) and a neck portion (2), and metal flow lines (3) continue from the face portion (1) to the neck portion (2). These metal flow lines (3) extend in a single direction on the face portion (1). A method of manufacturing a golf club according to the present invention comprises steps of bending a rod member subjected to drawing plastic working on an end and forging the rod member after the bending for integrally molding a face portion (1) and a neck portion (2).
Type:
Grant
Filed:
August 2, 2001
Date of Patent:
December 23, 2003
Assignees:
Mizuno Corporation, Chuo Industries, Ltd.
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