Process for manufacturing thin tin/tungsten composite elements
US6569381B2 · kind B2 · utility
4Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The subject of the invention is a particularly simple and inexpensive process for manufacturing tin/tungsten composite elements having a thickness of between 1 mm and 6 mm, such as spherical shot for hunting cartridges or fishing sinkers, from a tin/tungsten powder blend. The powder blend is extruded, in the solid state, directly into a wire whose thickness is between 1 mm and 6 mm with an extrusion rate≦80 mm/s. Next, the wire is cut into pieces which are then forged to the desired shape, especially into spheres. The subject of the invention is also the aforementioned process for obtaining the wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.