Method of molding a foamed core short distance golf ball
AssigneeMacGregor Golf Company
InventorsTroy L. Puckett, Lauro C. Cadorniga
Life of this patent
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Abstract
There is disclosed a one-piece short distance golf ball which is formed by foam molding a thermoplastic polymer and a filler. The resulting golf ball has a dense outer skin and a cellular core structure. The golf ball is approximately half the weight of and plays approximately half as far as a conventional golf ball, but its performance characteristics are otherwise comparable to a conventional golf ball. In addition a bramble surface pattern is provided on the ball to reduce the effects of wind on the ball's flight.
Claims9
A process for manufacturing a one-piece short distance golf ball comprising the steps of:
- a. forming a mixture of a thermoplastic rein, which is the product of the reaction of an olefin and metallic salt of an unsaturated monocarboxylic;
- acid, a chemical blowing agent, and a filler material for improving the impact resistance of the resulting golf ball which is microscopic hollow glass spheres;
- b. injecting in one second or less between 15 and 35 grams of the mixture into a cooled golf ball mold cavity that is approximately 1.68 inch in diameter;
- c. holding the mixture in the mold cavity for a time sufficient to form a dense skin adjacent the outside surface of the molded golf ball;
- d. opening the mold cavity and removing the golf ball therefrom;
- and
- e. quenching the golf ball in cooled water.
A process for manufacturing a one-piece short distance golf ball comprising the steps of:
- a. forming a mixture by weight of approximately 100 parts of uncured thermoplastic resin, between 0.5 and 15 parts of a filler material, and between 0.25 and 2.0 parts of a chemical blowing agent;
- b. injecting, in one second or less, between 15 and 35 grams of the mixture into a golf ball mold cavity that is cooled to approximately 40.degree. F. to 70.degree. and is approximately 1.68 inch in diameter;
- c. holding the mold cavity temperature at approximately 40.degree. F. to 70.degree. F. to form a dense skin adjacent the outside surface of the molded golf ball;
- d. opening the mold cavity and removing the golf ball therefrom;
- and
- e. quenching the golf ball in cooled water.
Dependencies are inferred from the claim text.