Method of injection molding a thermoplastic hollow or hollow foam filled one piece head of a golf club
US4614627A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1983 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Sep 7, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/012
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A one-piece, hollow, moulded head for a golf-club of the "wood" or "driver" type is made by injecting a thermoplastics material around a fusible core having a melting-point below the injection temperature, allowing the injected material to set and melting out the core. One or more holes are provided, the holes extending completely through the core, so that the injected material fills each hole and sets therein to provide corresponding internal "struts" in the moulding. The injected material may be, e.g., a polyamide, a polycarbonate, a poly(phenylene oxide), an acetal resin or an ABS resin. The material may be reinforced with up to 50% by weight of glass and/or carbon fibres. The moulded head may optionally be filled with a polyurethane foam. The finished moulding may have the conventional face-pieces and/or sole-plates attached thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.