Abrasive preforms, method of making an abrasive article, and bonded abrasive article

Patent metadata

Field	Value
Publication number	US-10259102-B2
Application number	US-201515518601-A
Country	US
Kind code	B2
Filing date	Oct 19, 2015
Priority date	Oct 21, 2014
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

Abrasive preforms include a frame having first and second opposed parallel major surfaces. The first major surface has a plurality of first cavities formed therein. The second major surface optionally has a plurality of second cavities formed therein. The frame comprises a binder precursor material. Abrasive particles are disposed in at least a portion of the plurality of first cavities and optional plurality of second cavities. Methods of making abrasive articles using the abrasive preforms and bonded abrasive articles preparable thereby are also disclosed.

First claim

What is claimed is:

1. An abrasive preform comprising:
a frame having first and second opposed parallel major surfaces, wherein the first major surface has a plurality of precisely-shaped cavities formed therein, wherein the frame comprises a binder precursor material; and
ceramic abrasive particles disposed in at least a portion of the plurality of precisely-shaped cavities, wherein the ceramic abrasive particles comprise an oxide or carbide of at least one metal, wherein the ceramic abrasive particles are shaped abrasive particles; wherein each one of the precisely-shaped ceramic abrasive particles respectively has top and base surfaces separated by and abutting at least three sidewalls.

2. The abrasive preform of claim 1 , wherein the binder precursor material comprises at least one of glass or ceramic material, or a precursor thereof.

3. The abrasive preform of claim 1 , wherein the ceramic abrasive particles are precisely-shaped.

4. The abrasive preform of claim 1 , wherein a majority of the precisely-shaped ceramic abrasive particles are respectively disposed within corresponding ones of the plurality of precisely-shaped cavities such that their base surfaces are aligned with the first major surface of the frame.

5. The abrasive preform of claim 4 , wherein a majority of the precisely-shaped ceramic abrasive particles are respectively disposed within corresponding ones of the plurality of precisely-shaped cavities such that their base surfaces form a dihedral angle with the first major surface of the frame of at least 45 degrees.

6. The abrasive preform of claim 1 , wherein the binder precursor material comprises a melt-flowable composition.

7. A method of making an abrasive article, the method comprising steps:
i) providing a first abrasive preform according to claim 1 ; and
ii) softening and curing the first abrasive preform thereby hardening the frame.

8. An abrasive preform comprising:
a frame having first and second opposed parallel major surfaces, wherein the first major surface has a plurality of first cavities formed therein, wherein the second major surface has a plurality of second cavities formed therein, and wherein the frame comprises a binder precursor material;
first abrasive particles disposed in at least a portion of the plurality of first cavities; and
second abrasive particles disposed in at least a portion of the plurality of second cavities.

9. The abrasive preform of claim 8 , wherein the binder precursor material comprises at least one of glass or ceramic material, or a precursor thereof.

10. The abrasive preform of claim 8 , wherein the first abrasive particles comprise precisely-shaped ceramic abrasive particles.

11. The abrasive preform of claim 10 , wherein a majority of the precisely-shaped ceramic abrasive particles are respectively disposed within corresponding ones of the plurality of precisely-shaped cavities such that their base surfaces are aligned with the first major surface of the frame.

12. The abrasive preform of claim 10 , wherein the binder precursor material comprises a melt-flowable composition.

13. A method of making an abrasive article, the method comprising steps:
i) providing a first abrasive preform according to claim 8 ; and
ii) softening and curing the first abrasive preform thereby hardening the frame.

14. The method of claim 13 , further comprising:
providing a backing; and
urging the first abrasive preform and the backing together while performing step ii) such that the backing and the first abrasive preform permanently join together.

Assignees

• 3M Innovative Properties Co

Inventors

• Goers Brian D
• Schillo-Armstrong Melissa C
• Beveridge Jacob S

Classifications

• B24D18/0072

  using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing · CPC title

• B24D5/06

  with inserted abrasive blocks, e.g. segmental · CPC title

• B24D7/02 Primary

  Wheels in one piece · CPC title

• B24D5/04

  with reinforcing means · CPC title

• B24D3/14 Primary

  ceramic, i.e. vitrified bondings · CPC title