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    Abrasive particle with enhanced retention features
    63.
    发明授权
    Abrasive particle with enhanced retention features 有权

    公开(公告)号：US11702576B2

    公开(公告)日：2023-07-18

    申请号：US17301078

    申请日：2021-03-24

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Negus B. Adefris

    IPC: B32B5/16 ,  C09K3/14 ,  B24D3/00

    CPC classification number: C09K3/1409 ,  B24D3/00 ,  Y10T428/2982

    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.

    Bonded Abrasive Articles Including Oriented Abrasive Particles, and Methods of Making Same
    69.
    发明申请
    Bonded Abrasive Articles Including Oriented Abrasive Particles, and Methods of Making Same 审中-公开

    公开(公告)号：US20200016725A1

    公开(公告)日：2020-01-16

    申请号：US16335402

    申请日：2017-10-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Negus B. Adefris ,  Carsten Franke ,  Robert L.W. Smithson ,  Brian D. Goers ,  Maria Celeste Castillo ,  Maiken Givot

    IPC: B24D3/06 ,  B24D3/28 ,  B24D18/00 ,  B33Y80/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y40/00 ,  B29C64/165 ,  B29C64/35 ,  B28B1/00 ,  B28B11/24 ,  C09K3/14

    Abstract: The present disclosure provides bonded abrasive articles including abrasive particles retained in a binder. The abrasive particles are oriented at a predetermined angle greater than 0 degrees and less than 90 degrees with respect to a longitudinal axis of the bonded abrasive article. Fifty percent or more of the abrasive particles are oriented within 15 degrees above or below the angle, as measured using microscopy image analysis under magnification. The present disclosure further provides a method of making a bonded abrasive article, the method comprising sequential steps. The steps include (a) a sub-process comprising sequentially: i) depositing a layer of loose powder particles in a confined region, wherein the loose powder particles comprise matrix particles and abrasive particles; ii) spreading the layer of loose powder particles with a spreading bar or roller to provide a substantially uniform thickness, wherein a gap between the spreading bar or roller and a base plane of the confined region is selected to be shorter than an average length of the abrasive particles; and iii) selectively treating an area of the layer of loose powder particles to bond powder particles together. Step b) includes independently carrying out step a) a number of times to generate a bonded abrasive article preform including the bonded powder particles and remaining loose powder particles. Step c) includes separating remaining loose powder particles from the bonded abrasive article preform. Step d) includes heating the bonded abrasive article preform to provide the bonded abrasive article. Further, methods are provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a bonded abrasive article; and generating, with the manufacturing device by an additive manufacturing process, a bonded abrasive article preform based on the digital object. A system is also provided, including a display that displays a 3D model of a bonded abrasive article; and one or more processors that, in response to the 3D model selected by a user, cause a 3D printer to create a physical object of a bonded abrasive article preform.

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