Method of making a golf ball with a multi-layer core
First Claim
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1. A method of making a golf ball comprising the steps of:
- forming a core having a core hardness;
providing a roll stock comprising a first layer having a first hardness, a second layer having a second hardness, and a third layer having a third hardness, wherein at least one of the first, second, and third layers is formed of a thermoset material, wherein the thermoset material comprises a thermoset polybutadiene material and wherein at least one of the first, second, and third layers is formed from a thermoplastic material, and wherein the first, second, and third hardnesses differ by about 3 Shore D to about 20 Shore D, and wherein the first hardness is greater than the core hardness;
heating the roll stock to a softening point;
forcing the roll stock against a plurality of molds;
cooling the plurality of molds;
removing the roll stock from the plurality of molds to form a plurality of shells;
positioning two of the plurality of shells to surround the core; and
forming a cover from a castable reactive liquid material.
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Abstract
A method for making a multilayer golf ball including a solid center having a center hardness, a plurality of laminates cut into a plurality of shapes formed around the center to create an inner ball, and a cover formed around the inner ball, wherein the plurality of layers can include at least a first layer having a hardness greater than the center hardness and a second layer having a hardness greater than the first layer hardness, and optionally a third layer disposed between the first and the second layers having a hardness greater than the first layer hardness.
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Citations
11 Claims
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1. A method of making a golf ball comprising the steps of:
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forming a core having a core hardness; providing a roll stock comprising a first layer having a first hardness, a second layer having a second hardness, and a third layer having a third hardness, wherein at least one of the first, second, and third layers is formed of a thermoset material, wherein the thermoset material comprises a thermoset polybutadiene material and wherein at least one of the first, second, and third layers is formed from a thermoplastic material, and wherein the first, second, and third hardnesses differ by about 3 Shore D to about 20 Shore D, and wherein the first hardness is greater than the core hardness; heating the roll stock to a softening point; forcing the roll stock against a plurality of molds; cooling the plurality of molds; removing the roll stock from the plurality of molds to form a plurality of shells; positioning two of the plurality of shells to surround the core; and forming a cover from a castable reactive liquid material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making a golf ball comprising the steps of:
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forming a core; providing a roll stock comprising at least two layers wherein at least one of the two layers is formed of a thermoset material, wherein the thermoset material is polybutadiene; wherein the roll stock further comprises at least one sheet of material formed from a thermoplastic material; heating the roll stock to a softening point; engaging in a mold cycle comprising the steps of; forcing the roll stock against a plurality of molds; cooling the plurality of molds; removing the roll stock from the plurality of molds to form a plurality of shells, wherein the mold cycle is about 30 seconds or less; positioning two of the plurality of shells to surround the core; and forming a cover disposed about the shells comprising a castable reactive liquid material having a hardness of less than 60 Shore D. - View Dependent Claims (8, 9, 10, 11)
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Specification