Strip casting
US6820680B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Mar 13, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/0622
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Start up method for initiating casting of metal strip in a twin roll caster comprising parallel casting rolls. A casting pool of molten metal is supported on the casting rolls and confined at the ends of the rolls by side closure plates and the rolls are rotated to deliver cast trip downwardly from the nip between them. One roll is continuously biased laterally toward the other roll either by spring biasing units or by hydraulic biasing units. On start up the gap between rolls is set so as to be less than the thickness of the strip to be cast and the rolls are rotated at such speed that on pouring of molten metal to initiate casting strip is produced to a thickness which is greater than the initial gap between the rolls thereby to cause the biased roll to move bodily away from the other roll to increase the gap between the rolls to accommodate the thickness of the cast strip. This allows initiation of casting without the need for introduction of a dummy bar between the rolls. The peripheral surfaces of rolls may have a negative crown c and the initial gap at the centres of the rolls may be d0=2c+g0 where g0 is an initial roll edge gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.