Golf club head with improved inertia performance

Abstract

A method of forming a golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the method forms a golf club head that achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA).

What is claimed is: 
     
         1 . A method of forming a golf club comprising the steps of:
 forming a frontal portion comprised of a crown return, a sole return and a striking face, comprised of titanium;   forming a rear portion and a plurality of support members therein by:
 forming a wax rear portion with a plurality of tabs on an inner surface thereof; 
 forming a plurality of wax support members; 
 coupling the wax support members to the plurality of tabs in the wax rear portion to form a final rear wax; and 
 using the final rear wax to cast the rear portion and the plurality of support members from titanium; and 
   welding the rear portion to the frontal portion.   
     
     
         2 . The method of forming a golf club of  claim 1 , further comprised of:
 forming the wax rear portion to comprise a wax crown at an upper portion and a wax sole on a bottom portion; and   wherein the plurality of wax support members extend from the wax crown to the wax sole and from a back edge toward a front edge of the wax rear portion, and wherein a first wax support member is located near a central portion of the wax rear portion in a heel-to-toe orientation.   
     
     
         3 . The method of forming a golf club of  claim 2 , wherein the first wax support member has a first maximum height parallel to a y-axis, a first maximum depth parallel to a z-axis and a first thickness and the first depth is greater than the first maximum height and the first thickness is between 0.5 mm and 1.5 mm. 
     
     
         4 . The method of forming a golf club of  claim 3 , wherein the first wax support member has a plurality of angled strut members that form angles α in between the strut members of between 30 degrees and 100 degrees. 
     
     
         5 . The method of forming a golf club of  claim 3 , wherein a second wax support member is on a toe side of the first wax support member, between 20% and 70% of a distance from the first wax support member and a furthest toe edge of the wax rear portion, and a third wax support member is on a heel side of the first wax support member, between 20% and 70% of a distance from the first wax support member and a furthest heel edge of the wax rear portion. 
     
     
         6 . The method of forming a golf club of  claim 5 , wherein the second wax support member and the third wax support member have a plurality of angled strut members that form angles α in between the strut members of between 30 degrees and 100 degrees.