Method for manufacturing a golf product
AssigneeCallaway Golf Company
InventorsDavid M. Melanson, Thomas A. Veilleux, Vincent J. Simonds, Michael J. Tzivanis
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Abstract
A process for reaction injection molding a polyurethane material for a layer of a golf ball is disclosed herein. The layer is preferably a cover for the golf ball. The process discloses preferred pressure parameters and mass flow parameters for reaction injection molding the layer. Such preferred pressure parameters include the difference from mix-head open to the shot mid-point, ΔΔPom, and the pressure difference from mix-head open to close, or ΔΔPoc. The mass flow parameters include the percentage change in mass flow ratio from mix-head open to shot mid-point, or % MFRom, and the change in mass flow ratio from mix-head open to shot mid-point, or ΔMFRom.
Claims20
A process for reaction injection molding, the process comprising:
- introducing a polyol component into a molding apparatus;
- and
- introducing an isocyanate component into the molding apparatus;
- forming an article, the article formed from the reaction product of the polyol component and the isocyanate component;
- wherein a pressure difference ΔΔPom is less than 100 psi.
A process for reaction injection molding an article, the process comprising:
- introducing a polyol component into a molding apparatus;
- and
- introducing an isocyanate component into the molding apparatus;
- reacting the polyol component and the isocyanate component within the molding apparatus to create a reaction product;
- forming an article, the article formed from the reaction product;
- wherein an impingement velocity for the isocyanate component ranges from 50 to 2,000 feet per second, and an impingement velocity for the polyol component ranges from 50 to 2,000 feet per second.
A process for reaction injection molding an article, the process comprising:
- introducing a polyol component into a molding apparatus;
- and
- introducing an isocyanate component into the molding apparatus;
- forming an article, the article formed from the reaction product of the polyol component and the isocyanate component;
- wherein a pressure difference ΔΔPom is less than 200 psi and a change in mix ratio, % MFRom, from mix-head open to shot mid-point is within 20%.
Dependencies are inferred from the claim text.