Method and mold for aluminothermic welding of rails
US5215139A · kind A · utility
8Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Nov 8, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B11/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In forming an aluminothermic weld between adjoining rail ends, a sand mold is arranged around the rail ends disposed in spaced relation. The sand mold is formed at least in part of silica sand. The surface of the mold in contact with the rail ends and enclosing the space between the rail ends is formed of one of a combination of silica sand and zircon sand, a layer of zircon sand inwardly from a layer of silica sand, or a thin layer of a zircon mold wash on a surface formed of silica sand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.