Claims
- 1. Abrasive agglomerate particles comprising a matrix of multi-cellular foamed glass and abrasive grit particles encapsulated within the cell walls of said glass.
- 2. Abrasive agglomerates as in claim 1 in which the abrasive grit is oxidation sensitive.
- 3. Abrasive agglomerates as in claim 1 in which said agglomerates include particles of cryolite.
- 4. Abrasive aggregates as in Claim 1 having a specific gravity of from 0.32 to 0.88 grams/cc.
- 5. Abrasive agglomerates as in claim 1 having a generally spherical shape.
- 6. Abrasive agglomerates as in claim 1 in which the glass is an aluminum borosilicate composition.
- 7. Abrasive agglomerates as in claim 1 in which the glass contains particles of cryolite, and the abrasive grits are fused aluminum oxide.
- 8. Abrasive agglomerates according to claim 1 in which the abrasive grit particles are present in greatest concentration in the exterior cells of the foamed glass.
- 9. A coated abrasive sheet material made by adhesively bonding the agglomerates of claim 1 to a flexible backing.
- 10. A method of making abrasive agglomerate particles comprising mixing abrasive grits with a foamable glass raw batch, forming the mixture into shaped particles, and firing said particles to foaming temperature, and cooling to room temperature.
- 11. A method as in claim 10 in which the firing takes place in a vertical shaft furnace.
- 12. A method as in claim 10 in which the foamable glass raw batch contains mineral precursors to form glass.
- 13. Agglomerates of cylindrical or spherical multicellular-glass bonded abrasive grits made according to the process of claim 10.
- 14. Abrasive agglomerates according to the process of claim 10 containing abrasive grits which are oxidation sensitive.
- 15. A ceramic bonded grinding wheel containing the abrasive agglomerates of claim 10.
- 16. A resin bonded grinding wheel containing the abrasive agglomerates of claim 10.
- 17. A ceramic bonded grinding wheel containing the abrasive agglomerates of claim 10 in which the abrasive is co-fused alumina zirconia.
- 18. A ceramic bonded grinding wheel containing the abrasive agglomerates of claim 1.
- 19. A resin bonded grinding wheel containing the abrasive agglomerates of claim 1.
- 20. A ceramic bonded grinding wheel containing the abrasive agglomerates of claim 1 in which the abrasive is co-fused alumina zirconia.
Government Interests
This invention is a continuation-in-part of my copending application Ser. No. 06/347,603, filed Feb. 10, 1982, now abandoned, which is a continuation-in-part of my prior application Ser. No. 06,220,641, filed Dec. 29, 1980, now abandoned.
US Referenced Citations (4)
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
347603 |
Feb 1982 |
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Parent |
220641 |
Dec 1980 |
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