公开(公告)号：US11992918B2

公开(公告)日：2024-05-28

申请号：US17415011

申请日：2019-12-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Joseph B. Eckel ,  Thomas J. Nelson ,  Aaron K. Nienaber ,  Ann M. Hawkins ,  Amelia W. Koenig ,  Negus B. Adefris

IPC: B24D11/00 ,  B24D3/00 ,  B24D3/28 ,  B24D18/00 ,  C09K3/14

CPC classification number: B24D11/005 ,  B24D3/28 ,  B24D18/0072 ,  C09K3/14

Abstract: Apparatus includes a production tooling having a dispensing surface with a plurality of cavities and formed into an endless belt. An abrasive particle feeder dispenses shaped abrasive particles onto the dispensing surface and into the plurality of cavities. A resin coated backing receives shaped abrasive particles from the cavities of the production tooling at a deposit point. A detecting device detects a pattern transition zone as the production tooling moves in the direction of travel and provides pattern transition zone detection data to one or more controllers to control a speed of the production tooling and/or a speed of the resin coated backing as the detected pattern transition zone passes the deposit point to change a pattern density of the shaped abrasive particles in a portion of the resin coated backing corresponding to the pattern transition zone of the production tooling.

公开(公告)号：US11634618B2

公开(公告)日：2023-04-25

申请号：US16376348

申请日：2019-04-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Negus B. Adefris

IPC: B24D18/00 ,  B24D11/00 ,  B24D3/14 ,  C09K3/14 ,  C04B35/111 ,  C04B35/628 ,  B24D3/02 ,  B24D3/00

Abstract: Shaped ceramic abrasive particles include a first surface having a perimeter having a perimeter comprising at least first and second edges. A first region of the perimeter includes the second edge and extends inwardly and terminates at two corners defining first and second acute interior angles. The perimeter has at most four corners that define acute interior angles. A second surface is disposed opposite, and not contacting, the first surface. A peripheral surface is disposed between and connects the first and second surfaces. The peripheral surface has a first predetermined shape. Methods of making the shaped ceramic abrasive particles, and abrasive articles including them are also disclosed.

公开(公告)号：US20210353387A1

公开(公告)日：2021-11-18

申请号：US17284540

申请日：2019-10-11

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bhaskar V. Velamakanni ,  Paul R. Klaiber ,  Richard P. Rusin ,  Daniel J. Skamser ,  Negus B. Adefris

IPC: A61C7/08 ,  A61C19/06 ,  A61K6/69

Abstract: A dental appliance is described, the dental appliance including a polymeric substrate with a plurality of cavities for receiving one or more teeth, an arrangement of engineered microstructures on the substrate wherein the engineered microstructures include a therapeutic agent. The microstructures may be three-dimensionally engineered on a polymeric film disposed on a major surface of the polymeric substrate, wherein the microstructures extend outwards from the surface. The microstructures also comprise a compound releasable from the three-dimensionally engineered microstructures over a predetermined patient wear time.

公开(公告)号：US20210316503A1

公开(公告)日：2021-10-14

申请号：US17304596

申请日：2021-06-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carsten Franke ,  Maiken Givot ,  Malte Korten ,  Robert L.W. Smithson ,  Brian D. Goers ,  Negus B. Adefris ,  Thomas J. Anderson ,  Brian A. Shukla ,  Michael C. Harper ,  Elizaveta Y. Plotnikov

IPC: B29C64/153 ,  B24D3/06 ,  B24D3/14 ,  B24D5/10 ,  B24D18/00 ,  B24D7/10 ,  B24D5/06 ,  B22F12/00 ,  B29C64/393

Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor. Also, methods including receiving, by a manufacturing device having a processor, a digital object specifying data for an abrasive article, and generating the abrasive article with the manufacturing device.

公开(公告)号：US11072053B2

公开(公告)日：2021-07-27

申请号：US16070316

申请日：2017-01-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carsten Franke ,  Maiken Givot ,  Malte Korten ,  Robert L. W. Smithson ,  Brian D. Goers ,  Negus B. Adefris ,  Thomas J. Anderson ,  Brian A. Shukla ,  Michael C. Harper ,  Elizaveta Y. Plotnikov

IPC: B24D3/06 ,  B22F3/00 ,  B22F3/105 ,  B24D3/14 ,  B24D5/10 ,  B24D7/10 ,  B33Y80/00 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/153 ,  B24D18/00

Abstract: The present disclosure provides methods of making a vitreous bond abrasive article and a metal bond abrasive article. The methods include sequential steps. Step a) includes a subprocess including sequentially: i) depositing a layer of loose powder particles in a confined region; and ii) selectively applying heat via conduction or irradiation, to heat treat an area of the layer of loose powder particles. The loose powder particles include abrasive particles and organic compound particles, as well as vitreous bond precursor particles or metal particles. The layer of loose powder particles has substantially uniform thickness. Step b) includes independently carrying out step a) a number of times to generate an abrasive article preform comprising the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the abrasive article preform. Step d) includes heating the abrasive article preform to provide the vitreous bond abrasive article comprising the abrasive particles retained in a vitreous bond material, or to provide the metal bond abrasive article. A method of making a metal bond abrasive optionally includes infusing an abrasive article preform with a molten lower melting metal and solidifying the molten lower melting metal to provide the metal bond abrasive article. The present disclosure further provides a vitreous bond abrasive article precursor and a metal bond abrasive article precursor.

公开(公告)号：US10988648B2

公开(公告)日：2021-04-27

申请号：US16333370

申请日：2017-09-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Negus B. Adefris

IPC: C09K3/14

Abstract: The present inventive subject matter provides an abrasive particle. The abrasive particle can include an elongated body that is defined between opposed first and second ends. Each end defines a substantially planar surface. An axis extends through the first and second ends, and each end has a respective first and second cross-sectional area. At least one of the first and second ends is oriented at an angle relative to the axis that is less than 90 degrees. The elongated body has a variable cross-sectional area centered along the axis. At least one cross-sectional area between the first and second ends represents a local minimum cross-sectional area.

公开(公告)号：US20210002533A1

公开(公告)日：2021-01-07

申请号：US16976548

申请日：2019-03-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Taisiya Skorina ,  Negus B. Adefris

IPC: C09K3/14

Abstract: A shaped abrasive agglomerate particle includes a shaped abrasive particle bonded in a siliceous matrix. The siliceous matrix comprises a reaction product of an alkali silicate and a hardener. The abrasive agglomerate particles are useful in abrasive articles. Methods of making the shaped abrasive agglomerate particle and abrading a workpiece are also described.

公开(公告)号：US20200231851A1

公开(公告)日：2020-07-23

申请号：US16649031

申请日：2018-09-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Dwight D. Erickson ,  Negus B. Adefris

IPC: C09K3/14

Abstract: A method of making elongated abrasive particles includes five steps. Step 1) includes providing a mold having parallel linear grooves, partially interrupted at predetermined intervals by transverse obstructions. Step 2) includes filling the parallel linear grooves with a flowable abrasive particle precursor composition. Step 3) includes at least partially drying the flowable abrasive particle precursor composition to form an at least partially dried abrasive particle precursor composition. Step 4) includes separating that composition from the mold, thereby forming elongated precursor abrasive particles having a shape corresponding to portions of the parallel linear grooves disposed between the transverse obstructions. At least one of the first and second opposite ends of the elongated precursor abrasive particles comprises both a molded portion and a fractured portion. Step 5) converts the elongated precursor abrasive particles into elongated abrasive particles. Elongated abrasive particles preparable by the method and abrasive articles containing them are also disclosed.

公开(公告)号：US20190283216A1

公开(公告)日：2019-09-19

申请号：US16318655

申请日：2017-07-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mark A. Lukowski ,  Brian D. Goers ,  Negus B. Adefris ,  Scott W. Peterson

IPC: B24D3/34 ,  B24D3/32

Abstract: An abrasive agglomerate particle includes fused aluminum oxide mineral bonded in a vitreous matrix. The fused aluminum oxide mineral is present in a range from 70 percent by weight to 95 percent by weight and the vitreous matrix is present at least at five percent by weight, based on the weight of the abrasive agglomerate particle. The fused aluminum oxide mineral has an average particle size of up to 300 micrometers, and the abrasive agglomerate particle has a frusto-pyramidal shape with side walls having a taper angle in a range from 2 to 15 degrees and a dimension of at least 400 micrometers. The abrasive agglomerate particles are useful in abrasive articles. The method includes contacting the workpiece with an abrasive article and moving the workpiece and the abrasive article relative to each other to abrade the workpiece.

公开(公告)号：US20180126515A1

公开(公告)日：2018-05-10

申请号：US15573254

申请日：2016-06-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Carsten Franke ,  Brian D. Goers ,  Robert L.W. Smithson ,  Negus B. Adefris ,  Brian A. Shukla ,  Michael C. Harper ,  Elizaveta Y. Plotnikov

IPC: B24D3/06 ,  B24D3/28 ,  B24D18/00 ,  B24B1/04 ,  B22F3/00

CPC classification number: B24D3/06 ,  A61C3/02 ,  A61C3/06 ,  B22F3/004 ,  B24B1/04 ,  B24D3/28 ,  B24D18/0009 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y80/00

Abstract: Methods of making metal bond abrasive articles via powder bed jetting are disclosed. Metal bond abrasive articles prepared by the method include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools.