公开(公告)号：US20230162898A1

公开(公告)日：2023-05-25

申请号：US17986366

申请日：2022-11-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NICHIA CORPORATION

Inventor： Masaaki ITO ,  Motoki HIRAOKA ,  Reimi TABUCHI ,  Hisashi MAEHARA ,  Michiya KUME

IPC: H01F1/059 ,  B22F1/142 ,  B22F1/05 ,  B22F1/17 ,  B22F3/14

CPC classification number: H01F1/0596 ,  B22F1/142 ,  B22F1/05 ,  B22F1/17 ,  B22F3/14 ,  B22F2203/11 ,  B22F2302/20 ,  B22F2301/35 ,  B22F2301/30 ,  B22F2303/30 ,  B22F2303/01 ,  B22F2304/10

Abstract: A Sm—Fe—N-based rare earth magnet more resistant to demagnetization than ever before in an environment where an external magnetic field is applied, particularly at high temperatures, and a production method thereof are provided.
The present disclosure presents a production method of a rare earth magnet, including preparing a coated magnetic powder, compression-molding the coated magnetic powder in a magnetic field to obtain a magnetic-field molded body, pressure-sintering the magnetic-field molded body to obtain a sintered body, and heat-treating the sintered body, and a rare earth magnet obtained by the method. D50 of the magnetic powder in the coated magnetic powder is 1.50 μm or more and 3.00 μm or less, the content ratio of the zinc component in the coated magnetic powder is 3 mass % or more and 15 mass % or less, and the heat treatment temperature is 350° C. or more and 410° C. or less.

公开(公告)号：US20220199321A1

公开(公告)日：2022-06-23

申请号：US17539491

申请日：2021-12-01

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NICHIA CORPORATION

Inventor： Masaaki ITO ,  Daisuke ICHIGOZAKI ,  Noritsugu SAKUMA ,  Akihito KINOSHITA ,  Michiya KUME ,  Hisashi MAEHARA

IPC: H01F41/02 ,  H01F1/059 ,  B22F3/16 ,  B22F3/24

Abstract: A rare-earth magnet and a method of manufacturing the same are provided. The method includes: preparing Sm-Fe-N magnetic powder; preparing reforming material powder containing metallic zinc; mixing the magnetic powder and the reforming material powder to obtain mixed powder; subjecting the mixed powder to compression molding in a magnetic field to obtain a magnetic-field molded body; subjecting the magnetic-field molded body to pressure sintering to obtain a sintered body; and subjecting the sintered body to heat treatment. A content proportion of the metallic zinc in the reforming material powder is 10 to 30% by mass with respect to the mixed powder. When a temperature and time in conditions for the heat treatment are defined as x° C. and y hours, respectively, the formulas y≥−0.32x+136 and 350≤x≤410 are met.

公开(公告)号：US20170125164A1

公开(公告)日：2017-05-04

申请号：US15404501

申请日：2017-01-12

Applicant: NICHIA CORPORATION

Inventor： Rie YOSHIDA ,  Michiya KUME ,  Kohei IHARA ,  Taku ICHIMORI

IPC: H01F41/02

CPC classification number: H01F41/0266 ,  H01F7/021 ,  H01F41/0273

Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.

公开(公告)号：US20180315526A1

公开(公告)日：2018-11-01

申请号：US15965300

申请日：2018-04-27

Applicant: NICHIA CORPORATION

Inventor： Rie YOSHIDA ,  Masahiro ABE ,  Michiya KUME ,  Kohei IHARA ,  Shuichi TADA

IPC: H01F1/053 ,  C08L77/02 ,  H01F7/02 ,  H01F1/059 ,  H01F41/02 ,  B29C45/00

CPC classification number: H01F1/083 ,  B22F1/0059 ,  H01F1/113 ,  H01F41/0266

Abstract: The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.

公开(公告)号：US20160303788A1

公开(公告)日：2016-10-20

申请号：US15131029

申请日：2016-04-18

Applicant: NICHIA CORPORATION

Inventor： Kohei IHARA ,  Michiya KUME

IPC: B29C47/00 ,  H01F1/047 ,  H01F7/02

CPC classification number: B29C47/0076 ,  B29B7/42 ,  B29C47/0004 ,  B29C47/0021 ,  B29C47/0066 ,  B29C47/40 ,  B29C47/92 ,  H01F1/0578 ,  H01F1/113 ,  H01F41/0266

Abstract: A method for manufacturing a bond magnet includes providing a bond magnet composition including a magnetic material and a resin, extruding the bond magnet composition in one direction to produce a molded body while orienting the magnetic material in the one direction, magnetizing the molded body in the one direction using an axial magnetization to produce a magnetized molded body, and laminating the magnetized molded body to produce a laminated molded body including first magnetized molded layers and second magnetized molded layers. The first magnetized molded layers and the second magnetized molded layers are alternately laminated. A first magnetization direction of each of the first magnetized molded layers is opposite to a second magnetization direction of each of the second magnetized molded layers.

Abstract translation: 一种粘结磁体的制造方法包括：提供包含磁性材料和树脂的粘结磁体组合物，在一个方向上挤出粘结磁体组合物以制造成型体，同时沿一个方向定向磁性材料，使成型体在 使用轴向磁化的一个方向来产生磁化成型体，并且层压该磁化成形体以制造包括第一磁化模制层和第二磁化模制层的层叠模制体。 第一磁化模制层和第二磁化模制层交替层压。 每个第一磁化模制层的第一磁化方向与每个第二磁化模制层的第二磁化方向相反。

公开(公告)号：US20160093426A1

公开(公告)日：2016-03-31

申请号：US14867714

申请日：2015-09-28

Applicant: NICHIA CORPORATION

Inventor： Rie YOSHIDA ,  Michiya KUME ,  Kohei IHARA ,  Taku ICHIMORI

IPC: H01F1/113 ,  H01F41/02 ,  H01F7/02

CPC classification number: H01F41/0266 ,  H01F7/021 ,  H01F41/0273

Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.

Abstract translation: 提供了包括第一和第二组分的粘结磁体。 第一和第二部件具有分别与第一和第二非作用表面相交的第一和第二非作用表面以及第一和第二作用表面。 第一和第二通量组分别从第一和第二非作用表面向第一和第二作用表面弯曲第一和第二组分内部。 第一和第二非作用表面的面积分别大于第一和第二作用表面。 第一和第二作用表面上的通量密度分别高于第一和第二非作用表面。 第一非作用表面上的极与第二非作用表面相反。 第一和第二非作用表面彼此连接。 第一个焊剂组从一个连续延伸到另一个。

公开(公告)号：US20240013961A1

公开(公告)日：2024-01-11

申请号：US18247391

申请日：2021-09-28

Applicant: NICHIA CORPORATION

Inventor： Masahiro ABE ,  Rie YOSHIDA ,  Shuichi TADA ,  Michiya KUME ,  Kohei IHARA ,  Naotake FUJITA

IPC: H01F7/02 ,  H01F1/053 ,  H01F41/02

CPC classification number: H01F7/021 ,  H01F1/0536 ,  H01F41/0253

Abstract: The present invention relates to a method of producing a composite component, the method including: preparing a second composite by fitting a first molded body onto a first composite including a rare earth magnet and a component contacting the rare earth magnet, such that the first molded body covers at least the entire surface of the first composite corresponding to the rare earth magnet; and forming a second molded body by inserting the second composite into a mold and injection-molding a thermoplastic resin such that the thermoplastic resin covers at least the entire surface of the first composite not covered by the first molded body and also contacts the first molded body.

公开(公告)号：US20220399163A1

公开(公告)日：2022-12-15

申请号：US17806300

申请日：2022-06-10

Applicant: NICHIA CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hisashi MAEHARA ,  Michiya KUME ,  Masaaki ITO

IPC: H01F41/02 ,  B22F1/12 ,  B22F3/16 ,  B22F1/00 ,  C22C38/00 ,  B22F3/24

Abstract: A method of producing a SmFeN-based rare earth magnet, the method including: dispersing a SmFeN-based anisotropic magnetic powder comprising Sm, Fe, and N using a resin-coated metal media or a resin-coated ceramic media to obtain a dispersed SmFeN-based anisotropic magnetic powder; mixing the dispersed SmFeN-based anisotropic magnetic powder with a modifier powder to obtain a powder mixture; compacting the powder mixture in a magnetic field to obtain a magnetic field compact; pressure-sintering the magnetic field compact to obtain a sintered compact; and heat treating the sintered compact.

公开(公告)号：US20210287832A1

公开(公告)日：2021-09-16

申请号：US17303571

申请日：2021-06-02

Applicant: NICHIA CORPORATION

Inventor： Rie YOSHIDA ,  Masahiro ABE ,  Michiya KUME ,  Kohei IHARA ,  Shuichi TADA

IPC: H01F1/053 ,  C08L77/02 ,  H01F7/02 ,  H01F1/059 ,  H01F41/02 ,  B29C45/00 ,  H01F1/08 ,  H01F1/113

Abstract: The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.

公开(公告)号：US20210104361A1

公开(公告)日：2021-04-08

申请号：US17073914

申请日：2020-10-19

Applicant: NICHIA CORPORATION

Inventor： Rie YOSHIDA ,  Michiya KUME ,  Kohei IHARA ,  Taku ICHIMORI

IPC: H01F41/02 ,  H01F7/02

Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.