Production tool to make abrasive particles with grooves
Assignee3M Innovative Properties Company
InventorsJohn T. Boden, Dwight D. Erickson, Scott R. Culler, Negus B. Adefris, John D. Haas
Life of this patent
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Abstract
Abrasive particles comprising shaped abrasive particles each having a sidewall, each of the shaped abrasive particles comprising alpha alumina and having a first face and a second face separated by a sidewall and having a maximum thickness, T; and the shaped abrasive particles further comprising a plurality of grooves on the second face.
Claims20
A plurality of shaped abrasive particles comprising alpha alumina and having an abrasives industry specified nominal grade or nominal screened grade, the shaped abrasive particles having a first face and a second face separated by a sidewall, wherein the sidewall forms a perimeter of the first face and second face, wherein at least 50% of the sidewall is planar such that it does not comprise areas that are convex from the first face to the second face, or areas that are concave from the first face to the second face.
A method of making the plurality of shaped abrasive particles comprising:
- filling shaped mold cavities of a production tool with a dispersion of aluminum oxide monohydrate;
- drying the dispersion in the shaped mold cavities to form precursor shaped abrasive particles that retain the shape of the mold cavities;
- removing the precursor shaped abrasive particles from the mold cavities;
- calcining and sintering the precursor shaped abrasive particles to form the plurality of shaped abrasive particles having a first face and a second face separated by a sidewall, wherein the sidewall forms a perimeter of the first face and second face, wherein at least 50% of the sidewall is planar such that it does not comprise areas that are convex from the first face to the second face, or areas that are concave from the first face to the second face.
Dependencies are inferred from the claim text.