公开(公告)号：WO1994002559A1

公开(公告)日：1994-02-03

申请号：PCT/US1993005778

申请日：1993-06-16

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  BERG, Todd, A. ,  ROWENHORST, Donley, D. ,  BERG, James, G. ,  LEONARD, William, K.

IPC: C09K03/14

CPC classification number: C04B35/1115 ,  B24D3/06 ,  B24D3/14 ,  B24D11/00 ,  B24D18/0009 ,  C04B35/626 ,  C09K3/1418

Abstract: A method of making abrasive particles having a specified shape and abrasive articles containing abrasive particles having a specified shape. The method for preparing such an abrasive particle comprises the steps of: (a) providing a dispersion containing particles of a precursor of alpha alumina, preferably particles of alpha alumina monohydrate, in a liquid, which liquid comprises a volatile component; (b) providing a mold having a first surface and a second surface opposed to said first surface, said first surface having an opening to a mold cavity having a specified shape; (c) introducing the dispersion into said mold cavity; (d) removing a sufficient portion of the volatile component of the liquid from the dispersion while the dispersion is in the mold cavity, to form a precursor of an abrasive particle having approximately the same shape as the shape of the recess of the mold cavity; (e) removing the precursor of the abrasive particle from the recess of the mold; (f) calcining the removed precursor of the abrasive particle; and (g) sintering the calcined precursor to form the desired abrasive particle.

Abstract translation: 制造具有特定形状的磨料颗粒和含有具有特定形状的磨料颗粒的磨料制品的方法。 制备这种磨料颗粒的方法包括以下步骤：（a）在液体中提供含有α氧化铝前体，优选α氧化铝一水合物颗粒的分散体的分散体，该液体包含挥发性组分; （b）提供具有与所述第一表面相对的第一表面和第二表面的模具，所述第一表面具有到具有指定形状的模腔的开口; （c）将分散体引入所述模腔中; （d）当分散体在模腔中时，从分散体中除去足够部分的挥发性成分的液体，以形成具有与模腔凹陷形状大致相同形状的磨料颗粒的前体; （e）从模具的凹槽中除去磨料颗粒的前体; （f）煅烧除去的磨料颗粒前体; 和（g）烧结煅烧前体以形成所需的磨料颗粒。

公开(公告)号：WO1993020275A1

公开(公告)日：1993-10-14

申请号：PCT/US1993001998

申请日：1993-03-05

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  LEONARD, William, K. ,  MOHN, Stephen, W. ,  SCHILLER, P., Daniel

IPC: D06B01/14

CPC classification number: D06B1/14

Abstract: A device for regulating the thickness of an applied coating. The device includes two members (12, 14) which define a gap (15) between them through which a web (20) can pass. A sensor (50) measures periodic variations in the thickness of the coating on the web. An automatic controller analyzes information from the sensor and converts the information into gap adjusting signals. Piezoelectric or magnetostrictive translators adjust the size of the gap to compensate for periodic variations in coating thickness.

Abstract translation: 用于调节涂层厚度的装置。 该装置包括两个构件（12,14），它们在它们之间限定出一个腹板（20）能通过的间隙（15）。 传感器（50）测量幅材上的涂层厚度的周期性变化。 自动控制器分析来自传感器的信息，并将信息转换为间隙调整信号。 压电或磁致伸缩转换器调整间隙的大小以补偿涂层厚度的周期性变化。