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Diffusion treatment device and method for manufacturing R-T-B system sintered magnet using same

  • US 10,639,720 B2
  • Filed: 08/19/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 08/24/2015
  • Status: Active Grant
First Claim
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1. A diffusion treatment device, comprising:

  • a treatment container including a cylindrical main body and a first lid and a second lid, the cylindrical main body having a treatment space which is capable of receiving a plurality of R-T-B sintered magnet pieces and diffusion sources, the first lid and the second lid being capable of hermetically sealing a first opening and a second opening, respectively, at opposite ends of the cylindrical main body;

    a conveyor for conveying the treatment container by a predetermined distance in an x-axis direction while a longitudinal direction of the treatment container is located in a y-axis direction in a rectangular coordinate system xyz where a z-axis direction is a vertical direction;

    a heating unit including a lower heating section provided under the treatment container and an upper heating section provided above the treatment container, at least one of the lower heating section and the upper heating section being movable in the z-axis direction and being arrangeable so as to surround at least a central part of the treatment container,a first rotating unit for rotating the treatment container around a y-axis while the longitudinal direction of the treatment container is located in the y-axis direction and the treatment container is surrounded by the lower heating section and the upper heating section, anda cooling unit subsequent to the heating unit, whereinthe cooling unit includes a lower cooling section provided under the treatment container and an upper cooling section provided above the treatment container, at least one of the lower cooling section and the upper cooling section being movable in the z-axis direction and being arrangeable so as to surround at least a central part of the treatment container.

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