CPC A63B 53/047 (2013.01) [A63B 53/08 (2013.01); A63B 53/0412 (2020.08); A63B 2053/0491 (2013.01); A63B 2209/10 (2013.01)] | 18 Claims |
1. A method for forming an iron-type golf club head comprising:
providing a main club body, a lightweight insert, a cap, and a weight;
wherein the main club body comprises:
a front, a rear, a toe end, a heel end, a strikeface, a strikeface front surface configured to impact a golf ball, a hosel configured to receive a golf shaft, a top-rail, a sole, a strikeface rear surface, and a perimeter sidewall formed by the top rail, the sole, the toe end and the heel end;
wherein the perimeter sidewall extends rearwardly generally perpendicular to the strikeface;
wherein a back cavity is defined by the perimeter sidewall and the strikeface rear surface; and
wherein the back cavity is open toward the rear of the main club body;
wherein the perimeter sidewall further comprises a locking groove recessed into the perimeter sidewall at least partially surrounding the strikeface rear surface;
wherein the locking groove is recessed into the perimeter sidewall in a direction parallel to the strikeface rear surface offset rearwardly from the strikeface rear surface;
wherein the main club body comprises an aperture in the heel end such that the aperture is a hole open to a heel end outer surface and also open to the back cavity;
wherein the main club body further comprises a first material having a first density;
wherein the first material comprises a first metallic alloy;
providing a forging die comprising an upper die platen and a lower die platen;
placing the main body within the forging die lower platen with the strikeface front surface oriented downwards and the back cavity is oriented upwards;
aligning a billet comprising a second material within the back cavity;
the second material having a second density lower than the first density;
inserting a pull rod through the aperture into the back cavity under the billet;
pressing the upper forging die platen down upon the lower forging die forming the lightweight insert;
lifting the upper forging die platen, and withdrawing the pull rod through the aperture forming a void within the lightweight insert;
receiving a weight within the void through the aperture;
sealing the aperture with the cap.
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