IP Library › Granted Patent US 12,703,816
Granted Patent B2
US 12,703,816 · App. 18/775,740 · Granted Aug 11, 2026

Shaped abrasive particles and methods of forming same

Inventors: Ralph Bauer (Niagara Falls, CA); Martin Barnes (Youngstown, NY); Margaret L. Skowron (Niagara Falls, NY); Rene G. Demers (Niagara Falls, CA)
Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.
C09K3/1409B01J2/20B01J2/22C04B35/10C04B35/624C09K3/1427C04B2235/3217C04B2235/6021Y10T428/2982
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Quick Facts
Patent No.
US 12,703,816
App. No.
18/775,740
Filed
Jul 17, 2024
Granted
Aug 11, 2026
Kind
B2
Examiner
ROY, DEBJANI
Art Unit
1741
USPC
425/324.1
Abstract

A method of forming a shaped abrasive particle includes applying a mixture into a shaping assembly within an application zone and directing an ejection material at the mixture in the shaping assembly under a predetermined force, removing the mixture from the shaping assembly and forming a precursor shaped abrasive particle.

Claims (18)

1 . A method comprising:

extruding a mixture into an opening in a shaping assembly within an application zone; and

removing the mixture from the opening by applying an external force to the mixture to form a precursor shaped abrasive particle

wherein the external force comprises a pressure of at least about 0.1 N.

2 . The method of claim 1 , wherein the mixture comprises a gel comprising a ceramic material and a liquid.

3 . The method of claim 2 , wherein the gel is a shape-stable material.

4 . The method of claim 2 , wherein the gel comprises a ceramic powder material as an integrated network of discrete particles.

5 . The method of claim 1 , wherein the mixture comprises an amount of a ceramic material of at least about 25 wt % for the total weight of the mixture and not greater than about 80 wt % for the total weight of the mixture.

6 . The method of claim 1 , wherein the mixture comprises not greater than about 30 wt % organic materials for the total weight of the mixture.

7 . The method of claim 1 , wherein the mixture comprises a storage modulus of at least about 1×10 4 Pa.

8 . The method of claim 1 , wherein the mixture comprises a change in weight of less than about 5% for a total weight of the mixture for a duration that the mixture is in the opening of the shaping assembly.

9 . The method of claim 1 , wherein the mixture comprises a change in volume of less than about 5% for a total volume of the mixture for a duration that the mixture is in the opening of the shaping assembly.

10 . The method of claim 1 , wherein an average residence time of the mixture in the opening of the shaping assembly is less than about 18 minutes.

11 . The method of claim 2 , wherein the ceramic material comprises an oxide, a nitride, a carbide, a boride, an oxycarbide, an oxynitride, or a combination thereof.

12 . The method of claim 2 , wherein the ceramic material comprises alumina.

13 . The method of claim 1 , wherein the mixture comprises a yield stress of at least about 1.5×10 3 Pa and not greater than about 50×10 3 Pa.

14 . The method of claim 1 , wherein the external force comprises a pressure of at least about 10 kPa and not greater than 10,000 kPa.

15 . The method of claim 1 , wherein the method further comprises cleaning the shaping assembly.

Continuity (7)
Continuation 15975549 · May 9, 2018
Continuation 15592430 · May 11, 2017
Continuation 15213758 · Jul 19, 2016
Continuation 14925191 · Oct 28, 2015
Continuation 13901362 · May 23, 2013
Provisional Application 61650673 · May 23, 2012
Related Publication 20240392176A1 · Nov 28, 2024
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