Multi-material golf club head
A golf club head made out of multi-material is disclosed herein. More specifically, the golf club head in accordance with the present invention has at least a portion of the body of the golf club head that is further comprised out of a base layer and a lightweight cover layer. The base layer may have a plurality of cutouts to help reduce unnecessary mass and the lightweight cover layer may be made out of an ultra-lightweight material to further reduce the unnecessary mass. The resulting golf club head may generally have a deep CG wherein the CG-B location is about 37 mm, and a CG-C location is greater than about 30 mm.
1. A golf club head comprising:
a striking face portion located at a frontal portion of said golf club head; and
a body portion attached to an aft portion of said striking face portion further comprising a crown portion and a sole portion;
wherein at least one of said crown portion or said sole portion further comprises a base layer and a lightweight cover layer;
said base layer further comprises a plurality of cutouts, and
said lightweight cover layer has an Internal Exposure Percentage of greater than about 25% and less than about 45°%,
wherein a transition region between said base layer and said lightweight cover layer further comprises a blend, said blend creates a smooth thickness transition between said base layer and said lightweight cover layer.
2. The golf club head of claim 1 , wherein said blend is applicable at a transition region located at said crown portion.
3. The golf club head of claim 2 , wherein said blend is applicable at both said transition region located at said crown portion and at a transition region at said sole portion.
4. The golf club head of claim 1 , wherein said base layer comprising a plurality of cutouts wraps around a toe portion of said body portion of said golf club head.
5. The golf club head of claim 4 , wherein said lightweight cover layer wraps around a toe portion of said body portion of said golf club head.
6. The golf club head of claim 1 , wherein said lightweight cover layer has an Internal Exposure Percentage of between about 20% to about 50%.
7. The golf club head of claim 6 , wherein said lightweight cover layer has an Internal Exposure Percentage of between about 25% to about 45%.
8. The golf club head of claim 7 , wherein said base layer has a maximum thickness of less than about 0.50 mm, and said lightweight cover layer has a maximum thickness of less than about 0.30 mm.
9. The golf club head of claim 8 , wherein said base layer has a maximum thickness of less than about 0.40 mm, and said lightweight cover layer has a maximum thickness of less than about 0.25 mm.
10. The golf club head of claim 9 , wherein said base layer has a maximum thickness of less than about 0.35 mm, and said lightweight cover layer has a maximum thickness of less than about 0.20 mm.
11. A golf club head comprising:
a striking face portion located at a frontal portion of said golf club head; and
a body portion attached to an aft portion of said striking face portion further comprising a crown portion and a sole portion;
wherein at least one of said crown portion or said sole portion further comprises a base layer and a lightweight cover layer;
said base layer further comprises a plurality of cutouts, and
said lightweight cover layer has an Internal Exposure Percentage of greater than about 25% and less than about 45%,
wherein at least one of said plurality of cutouts further comprises a stiffening member around a perimeter of said cutout.
12. The golf club head of claim 11 , wherein said stiffening member is a bevel.
13. The golf club head of claim 11 , wherein said stiffening member is an extension leg.
14. The golf club head of claim 11 , wherein said stiffening member is a round.
15. The golf club head of claim 11 , further comprising an adhesive layer sandwiched between said base layer and said lightweight cover layer.
16. The golf club head of claim 15 , wherein said adhesive layer is a film type adhesive.
17. The golf club head of claim 16 , wherein said film type adhesive has a thickness of less than about 15 mils.
18. A golf club head comprising:
a striking face portion located at a frontal portion of said golf club head; and
a body portion attached to an aft portion of said striking face portion further comprising a crown portion and a sole portion;
wherein at least one of said crown portion or said sole portion further comprises a base layer, a lightweight cover layer, and an adhesive layer sandwiched between said base layer and said lightweight cover layer;
said base layer further comprises a plurality of cutouts,
said lightweight cover layer has an Internal Exposure Percentage of greater than about 25% and less than about 45%, and
wherein said adhesive layer is a film type adhesive having a thickness of less than about 15 mils.
19. The golf club head of claim 18 , a transition region between said base layer and said lightweight cover layer further comprises a blend, said blend creates a smooth thickness transition between said base layer and said lightweight cover layer.
20. The golf club head of claim 19 , wherein said blend is applicable at a transition region located at said crown portion.