Golf club head
A golf club head with a multi-material construction in which a portion of the club head is a first material such as engineered stone or concrete and a second portion of the club head is a second material such as a metal, thermoplastic, or a composite.
1. A golf club head, the club head comprising:
a heel portion, a toe portion, and a ball-striking face; and
a hosel extending upward from the heel portion when the club head is at address, wherein the club head has a multi-material construction in which a first portion of the club head is made of a first material that makes up about 20 and 80 percent of a volume of the club head and includes concrete or engineered stone comprising crushed stone bound together by an adhesive, and a second portion of the club head is made of a second material different from the first material.
2. The club head of claim 1 , wherein the second portion is a body member providing at least a portion of an outer surface of the club head, and the first material is disposed within the body member.
3. The club head of claim 2 , wherein the body member is a metal casting and further wherein the club head is made by a process that includes cold-molding the first material using the metal casting as a mold for the cold-molding.
4. The club head of claim 1 , wherein the first material is concrete that comprises less than about 60% cement and at least about 40% pozzolan.
5. The club head of claim 4 , wherein the cement comprises between about 60 and 66 percent by weight CaO and between about 18 and 23 percent by weight SiO2.
6. The club head of claim 1 , wherein the first material further includes a reinforcing material disposed therein.
7. The club head of claim 6 , wherein the reinforcing material comprises a lattice of struts.
8. The club head of claim 7 , wherein the ball-striking face is provided by the first material and is surrounded by the body member made of the second material.
9. The club head of claim 8 , wherein the first material is engineered stone that makes up between about 40 and 80 percent of the volume of the golf club head.
10. The club head of claim 9 , wherein the body member is a metal casting.
11. The club head of claim 10 , wherein the club head is made by a process that includes cold-molding the first material using the metal casting as a mold for the cold-molding.
12. The club head of claim 6 , wherein the reinforcing material comprises fibers selected from the group consisting of steel fibers, composite fibers, and plastic fibers.
13. The club head of claim 6 , wherein the reinforcing material comprises reclaimed waste.