Process for manufacturing multi-layered cores
First Claim
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1. A method of forming a multi-layered core with improved centering of a spherical core, which comprises:
- providing an uncured polymeric component having a cure initiation temperature;
making the uncured polymeric component pliable by heating to a first temperature below the cure initiation temperature;
shaping the uncured polymeric component to form a plurality of uncured shells, each uncured shell having a hemispherical shape;
cooling each uncured shell to a second temperature such that the uncured shell is sufficiently rigid to maintain the hemispherical shape and resist deformation upon assembly with the spherical core;
assembling two cooled, uncured shells around the spherical core; and
joining the assembled cooled, uncured shells and the spherical core to form a multi-layered core by heating the shells to a temperature greater than the cure initation temperature.
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Abstract
The present invention provides a method of forming a multi-layered core, particularly a multi-layered core for a golf ball, that provides improved centering of the golf ball center within the core, while allowing existing formulations to be used. The method includes heating the core material, molding it to form hemispherical shells, cooling the hemispherical shells, and assembling two hemispherical shells around a golf ball center to form a multi-layered core. The increased rigidity of the shells resulting from cooling them allows the use of existing core formulations while improving the centering of the golf ball center.
54 Citations
25 Claims
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1. A method of forming a multi-layered core with improved centering of a spherical core, which comprises:
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providing an uncured polymeric component having a cure initiation temperature;
making the uncured polymeric component pliable by heating to a first temperature below the cure initiation temperature;
shaping the uncured polymeric component to form a plurality of uncured shells, each uncured shell having a hemispherical shape;
cooling each uncured shell to a second temperature such that the uncured shell is sufficiently rigid to maintain the hemispherical shape and resist deformation upon assembly with the spherical core;
assembling two cooled, uncured shells around the spherical core; and
joining the assembled cooled, uncured shells and the spherical core to form a multi-layered core by heating the shells to a temperature greater than the cure initation temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 24)
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13. A method of forming a multi-layered core with improved centering of a spherical core, which comprises:
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providing an uncured polymeric component having a cure initiation temperature;
making the uncured polymeric component pliable by heating to a first temperature below the cure initiation temperature;
shaping the uncured polymeric component to form a plurality of uncured shells, each uncured shell having a hemispherical shape;
cooling each uncured shell to a second temperature such that the uncured shell is sufficiently rigid to maintain the hemispherical shape and resist deformation upon assembly with the spherical core;
compression molding the assembled two cooled, uncured shells and the spherical core at a curing temperature greater than the cure initiation temperature to cure the cooled, uncured shells, thereby forming a multi-layered core. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25)
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Specification