Abrasive casting process
US4711750A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1981 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Jul 15, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/653
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A continuous process for casting a molten metal oxide such as an aluminous oxide and more particularly an alumina-zirconia eutectic composition that is subsequently crushed to produce an abrasive is provided wherein two thin metal belts are brought into face-to-face relation and the molten oxide is poured into the nip between the belts as they come into face-to-face relation. The material that is being solidified maintains the belts slightly spaced apart on the order of some small fraction of an inch (e.g. 1/16) and the back surface of the belt is flooded with copious quantities of cooling fluid (e.g. water) to maintain the belts below red heat. The belts are held in closely spaced relation for a sufficient time to permit the abrasive to be cooled below red heat. The belts are then separated and the abrasive is discharged from between the belts. At this point the abrasive is no longer affected by contaminants in the air, this aspect of the invention being particularly important in those embodiments of the invention where the molten abrasive (e.g. alumina zirconia abrasive) contains reduction products such as sub-oxides or elemental metal particles. In a preferred embodiment of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.