Acushnet Company

Mike Steve Bujdos

Peter J Gilbert

Terrill R McCabe

Jose G Perez

A wax pattern mold and molding process are disclosed for forming a wax pattern of a hollow, thin walled object, in particular, a golf club head. A mold is provided in at least two halves defining a mold cavity. A core made up of a plurality of interfitted parts is placed in the mold to precisely define the thin walls. The core and mold are provided with a registration channel such that the core is properly registered in the cavity to ensure dimensional integrity of the thin walls. Pins, holes, slots, and fingers are provided to lock the core parts together while the wax pattern is formed and to permit the core parts to be disassembled through an opening in the mold without separating the mold halves.

Wax pattern mold with stripable core

In accordance with the present invention, a set of golf club heads is disclosed. The set includes golf club heads with a sole and a cavity back. The cavity back contains at least one mass element or cavity weight. The weight of an upper portion of the peripheral weight, the mass element of the cavity back, and the weight of the sole can be changed so that the center of gravity rises from the long irons to the short irons. The center of gravity can also be changed in a set by using a dense material on various portions of the club head. By raising the center of gravity from the long irons to the short irons, a golfer will see a peak trajectory height along a line for each club head that is substantially more consistent along that line throughout the set than prior art clubs provide.

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Oceanside, CA, United States of America

Mike Steve Bujdos