Electrostatic application of insulative refractory dust or powder to casting belts of continuous casting machines--methods and apparatus
US5279352A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Aug 18, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/0668
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Electrostatic application of a dusting of dry, self-adhering, thermally and electrically insulative powder particles over a work face of an endless, thin, flexible, water-cooled, metallic casting belt advantageous for use in a continuous metal-casting machine. A dry dusting of protective powdery refractory substance is applied to the belt after being rendered airborne and electrostatically charged by various embodiments of suitable electrostatic apparatus. The casting belt to be dusted is electrically grounded for attracting the charged powder particles for adhering them to the casting belt. The dusting so deposited is remarkably uniform over a substantial area, a phenomenon explainable by mutual electrostatic repulsion of the dry powder particles being deposited. Continuously re-applied dusting over the work face of an endless casting belt during a cast provides an immediately useful repair of lost dusting powder. The dusting may be removed at will by means of an air knife. Certain powders that are effectively soft afford high thermal insulativity for the metallic casting belt, and desirably they cause only minimal interference with further mechanical processing of a cast metallic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.