Manipulation of magnetizable abrasive particles with modulation of magnetic field angle or strength
Assignee3M Innovative Properties Company
InventorsRonald D. Jesme, Thomas J. Nelson, Joseph B. Eckel, Aaron K. Nienaber, Vincent R. Jansen, Samad Javid
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Abstract
According to one embodiment, a method of making an abrasive article is disclosed. The method can comprise: providing a surface; disposing magnetizable abrasive particles on the surface; and varying a magnetic field relative to the magnetizable abrasive particles to impart a non-random orientation and/or alignment to the magnetizable abrasive particles relative to the surface.
Claims15
A method of making an abrasive article, the method comprising:
- providing a surface;
- disposing magnetizable abrasive particles on the surface;
- disposing a first magnet adjacent the surface;
- varying a magnetic field relative to the magnetizable abrasive particles to impart at least one of a non-random orientation and alignment to the magnetizable abrasive particles relative to the surface by varying a strength of a first magnetic field produced by the first magnet.
The method claim of 1, wherein the surface comprises a first major surface of a backing and the backing is translated as part of a continuous process.
A method of making a coated abrasive article, the method comprising:
- providing a backing;
- disposing magnetizable abrasive particles on the backing;
- varying a magnetic field relative to the magnetizable abrasive particles to impart at least one of a non-random orientation and alignment to the magnetizable abrasive particles relative to the backing, wherein varying comprises oscillating a first magnet up-web and down-web relative to a second magnet with the first magnet oriented substantially parallel with the backing.
A method of making a coated abrasive article, the method comprising:
- providing a backing;
- disposing magnetizable abrasive particles on the backing;
- disposing at least a first magnet adjacent one of the first major surface or a second opposing major surface of the backing;
- and
- varying a magnetic field relative to the magnetizable abrasive particles to impart at least one of a non-random orientation and alignment to the magnetizable abrasive particles relative to the backing;
- wherein varying the magnetic field comprises:
- rotating both the first magnet and the second magnet relative to the backing, arranging multiple magnets spaced from one another in the down-web direction,
- varying the polarity of one of the first magnet and the second magnet in one of a cross-web or the down-web direction;
- or
- disposing a third magnet up-web the first magnet and the second magnet in a drop area where the magnetizable abrasive particles are initially disposed on the backing.
Dependencies are inferred from the claim text.