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US 5,766,091 AGranted
Investment casting of golf club heads with high density inserts
AssigneeSelmet, Inc.
InventorsJ. Richard Humphrey, McNamara N. Pope
Life of this patent
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Abstract
Composite golf club heads having high density inserts cast by investment casting of reactive metals such as titanium that result in a high degree of bonding between the head and the insert.
Claims12
A method of making a composite golf club head containing at least one insert comprising the steps:
- (a) forming a disposable pattern of a golf club head that includes at least one insert at least a portion of which protrudes from the exterior of said pattern so as to form at least one protruding insert;
- (b) forming a multi-layered mold around said pattern and said protruding insert, said mold comprising (i) at least one face coat layer of metallic or ceramic particles and a metallic oxide binder, and (ii) a multiplicity of backup layers of progressively coarser particles and a metallic oxide binder, wherein said metallic particles in said at least one face coat layer are selected from the group consisting of Nb, Ta, Mo and W;
- (c) removing said pattern from said mold;
- (d) curing said mold to form a refractory mold;
- (e) filling said refractory mold at ambient temperature with a molten reactive metal to form a golf club head in the shape of said pattern and containing said at least one protruding insert;
- (f) removing said mold from said golf club head;
- and
- (g) removing the protruding portion of said at least one protruding insert.
5 more elements
Dependencies are inferred from the claim text.