Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

3m Innovative Company

Dennis G Welygan

Louis S Moren

Loren L Barber, Jr

Richard M Pihl

Jason A Chesley

Dwight D Erickson

Philip G Martin

Gary L Olson

Ronald O Zemke

Duane J Hayes

R Eugene Hardwick

Matthew T Scholz

Jason L Edgar

Ronald O Zemke, Deceased

Steven J Keipert

John T Boden

Charles J Studiner, Iv

Jayshree Seth

Leigh E Wood

Jeffrey O Emslander

Edward J Woo

Pingfan Peter Wu

Alan J Sipinen

Travis L Potts

Walter W Pawlikowski, Jr

William C Unruh

Robert D Kampfer

David E Johnson

Francis V Loncar, Jr

Mark R Dupre

Diane L Regnier

Scott A Baum

Robert W Shipman

Ronald O Zembke, Deceased

Kyongcheol Lee

Zemke, Ronald O

John S Luk

William H Hartt

John E Cejka

Charles J Iv Studiner

A method of making shaped ceramic abrasive particles includes cutting a layer of ceramic precursor material using a laser beam and forming shaped ceramic precursor particles. Further thermal processing provides shaped ceramic abrasive particles. Shaped ceramic abrasive particles producible by the methods and abrasive articles containing them are also disclosed.

Laser method for making shaped ceramic abrasive particles, shaped ceramic abrasive particles, and abrasive articles

Shaped ceramic articles can be obtained by screen printing the desired shapes from a dispersion of a precursor of the ceramic onto a receiving surface using a transfer assisted technique that applies a differential pressure, at least partially drying the screen printed shapes, and firing them to generate the shaped ceramic articles. Shaped abrasive particles made using lower viscosity sol gels that tended to flow or creep after the screen printing formation were found to have higher grinding performance over screen printed shaped abrasive particles made with higher viscosity sol gels.

Transfer assisted screen printing method of making shaped abrasive particles and the resulting shaped abrasive particles

The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a temporary layer comprising said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; embossing the layer comprising softened particulate curable binder material and abrasive particles to provide a pattern of raised areas and depressed areas and curing the softened particulate curable binder material to convert the embossed layer into a permanent embossed layer comprised of cured particulate binder material and abrasive particles and cure the at least partially cured primer coating on the first surface of the backing. The invention also provides an abrasive product having an embossed surface made by the method.

Abrasive product

A method of making an abrasive product includes compacting a cohesive layer of abrasive particles and particulate curable binder precursor prior to forming curable shaped structures, and then at least partially curing the curable binder precursor.

Method of making a structured abrasive article

Apparatus for making abrasive article

Method of using abrasive product

The invention provides a method and apparatus for making an abrasive product comprising providing a substantially horizontally deployed flexible backing having a first surface bearing an at least partially cured primer coating and an opposite second surface; providing a dry flowable particle mixture comprising abrasive particles and particulate curable binder material; depositing a plurality of temporary shaped structures comprised of said particle mixture on the at least partially cured primer coating of the first surface of the backing; softening said particulate curable binder material to provide adhesion between adjacent abrasive particles; and curing the softened particulate curable binder material to convert said temporary shaped structures into permanent shaped structures and cure the at least partially cured primer coating on the first surface of the backing. The invention also provides an abrasive product made by the method.

Abrasive product, method of making and using the same, and apparatus for making the same

Abrasive articles abrasive articles (e.g., abrasive wheels) comprised of abrasive agglomerate particles dispersed within cellular polymeric material, and methods of making and using the abrasive articles.

Cellular abrasive article

Abrasive articles (e.g., abrasive wheels) comprised of abrasive particles and polymeric material such as a polymeric reaction product of components comprising saturated polyol, saturated polyisocyanate, and a free radical source, and methods of making and using the abrasive articles.

Abrasive articles

Growing community of inventors

Woodbury, MN, United States of America

Dennis G Welygan