Method of molding polyurethane covered golf balls
US5006297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Feb 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S273/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyurethane covered golf ball is made by allowing the polyurethane cover stock material to partially cure in an open mold and subsequently molding a golf ball product. The molding is done by first molding a smooth-surfaced golf ball product in a smooth-walled fixed-pin mold and then, in a second molding step, using a compression mold to impart dimples onto the smooth-surfaced golf ball product. Between the two molding steps an intermediate curing step is employed. The initial curing time is an open mold and the intermediate curing time between the two molding steps is minimized through the use of a sufficient amount of catalyst, by keeping the smooth mold at an elevated temperature, or by using the fast-reacting chemical components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.