Ingot mould for the continuous vertical casting of metals
US6109335A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/041
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This mold consists of a cooled mold body (1), made of copper or a copper alloy, on which sits a refractory feed head (2) and a purge slit (8) is made at the interface between said mold body and said feed head, via which a stream of a waste inert gas is injected around the internal perimeter of the mold. The slit is supplied via a plenum chamber (13) made within the mold, the plenum chamber being itself supplied with gas via inlets (12) which connect it to a pressurized-gas supply (20). The injection slit (8) is segmented around the mold perimeter with the aid of separating means (21) which also segment the plenum chamber into compartments (13', 13", etc.) which are juxtaposed around the perimeter of the mold so that an inlet (12) runs out into each compartment thus formed. Thus, a plurality of elementary circuits (12'- 13"- 8'), which are mounted "in parallel" with respect to a single pressure chamber (20), are produced so that, overall, the injection of gas around the perimeter of the mold becomes insensitive to local perturbations such as local variations in the thickness of the slit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.