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Method of forming a multilayer golf ball with a thin thermoset outer layer

  • US 6,749,789 B1
  • Filed: 07/25/2000
  • Issued: 06/15/2004
  • Est. Priority Date: 05/27/1997
  • Status: Expired due to Term
First Claim
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1. A method of forming a golf ball comprising the steps of(a) forming a golf ball core;

  • (b) compression molding an inner cover layer around said golf ball core with a material having a first shore D hardness, thereby forming a coated golf ball core; and

    (c) casting an outer cover layer around said inner cover layer and golf ball core with a thermoset material having a second shore D hardness less than the first, wherein casting the outer cover layer comprises;

    (i) placing the inner cover layer and the golf ball core in core holder;

    (ii) gelling the thermoset material in the first mold half;

    (iii) placing the inner cover layer and the golf ball core in to the gelling thermoset material in the first mold half, (iv) disengaging the inner cover layer and the golf ball core from the core holder after a selected period of time;

    (v) placing the inner cover layer and the golf ball core, while still in said first mold half with the thermoset material against a second mold half having additional thermoset material and mating the two mold halves together; and

    (vi) curing the thermoset material in the mated mold halves.

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