公开(公告)号：US20240112857A1

公开(公告)日：2024-04-04

申请号：US18478965

申请日：2023-09-29

Applicant: NICHIA CORPORATION

Inventor： Takashi ASADA ,  Shuichi TADA

IPC: H01F41/02 ,  B22F1/05 ,  B22F1/142 ,  B22F1/145 ,  B22F3/02 ,  B22F3/26 ,  H01F1/059

CPC classification number: H01F41/0266 ,  B22F1/05 ,  B22F1/142 ,  B22F1/145 ,  B22F3/02 ,  B22F3/26 ,  H01F1/059 ,  B22F2003/248 ,  B22F2301/355 ,  B22F2998/10

Abstract: A method of preparing an anisotropic magnetic powder compression molded product, the method including: compressing a magnetic powder in a mold using a compression punch while magnetically orienting the magnetic powder to obtain a compressed magnetic powder, wherein the compression punch has a contact surface with the magnetic powder that is not perpendicular to a compression direction; and compression molding the compressed magnetic powder using a molding punch having a different shape from the compression punch.

公开(公告)号：US20240112838A1

公开(公告)日：2024-04-04

申请号：US18477949

申请日：2023-09-29

Applicant: NICHIA CORPORATION

Inventor： Masahiro ABE ,  Shuichi TADA ,  Satoshi YAMANAKA ,  Kenta IWAI

IPC: H01F1/059 ,  B22F1/142 ,  B22F1/145 ,  B22F1/16 ,  H01F1/055

CPC classification number: H01F1/059 ,  B22F1/142 ,  B22F1/145 ,  B22F1/16 ,  H01F1/0551 ,  B22F2201/02 ,  B22F2201/03 ,  B22F2201/11 ,  B22F2201/20 ,  B22F2301/355 ,  B22F2302/45 ,  B22F2998/10

Abstract: A method of producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method including stirring a slurry containing a raw material SmFeN-based anisotropic magnetic powder, water, a phosphate source, and an aluminum source to obtain a SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.

公开(公告)号：US20130187311A1

公开(公告)日：2013-07-25

申请号：US13727449

申请日：2012-12-26

Applicant: Nichia Corporation

Inventor： Shinji YOSHIMA ,  Muneo YAMAMOTO ,  Shuichi TADA ,  Akihiro IMAYAMA

IPC: B29C47/00

CPC classification number: B29C47/0004 ,  B29C47/0023 ,  B29C47/0066 ,  B29C47/20 ,  B29C47/92 ,  B29C2947/92704 ,  B29K2995/0008 ,  H01F41/028

Abstract: In a method for manufacturing a cylindrical bonded magnet, a molding space having a cylindrical shape is filled with a bonded magnet composition containing a magnetic material and a resin. The magnetic material disposed in the molding space is magnetically oriented using an orientation magnet. The orientation magnet includes a first permanent magnet and a second permanent magnet. The first and second permanent magnets are disposed such that same poles are opposite each other in the axial direction.

Abstract translation: 在制造圆柱形粘结磁体的方法中，用含有磁性材料和树脂的粘结磁体组合物填充具有圆柱形形状的模制空间。 设置在成型空间中的磁性材料使用定向磁铁进行磁取向。 取向磁铁包括第一永久磁铁和第二永久磁铁。 第一永久磁铁和第二永久磁铁被设置为使得相同的磁极在轴向方向上彼此相对。

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：US20230415227A1

公开(公告)日：2023-12-28

申请号：US18253676

申请日：2021-09-30

Applicant: NICHIA CORPORATION

Inventor： Masahiro ABE ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Kenta IWAI

IPC: B22F1/16 ,  H01F1/059 ,  H01F1/055 ,  B22F1/145 ,  B22F1/142 ,  B22F1/103 ,  B22F9/20 ,  B22F3/20 ,  B22F3/22

CPC classification number: B22F1/16 ,  B22F2999/00 ,  H01F1/0551 ,  B22F1/145 ,  B22F1/142 ,  B22F1/103 ,  B22F9/20 ,  B22F3/20 ,  B22F3/225 ,  B22F2301/355 ,  B22F2302/45 ,  B22F2998/10 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/05 ,  H01F1/059

Abstract: A method for producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method includes: a phosphate treatment of adding an inorganic acid to a slurry containing an SmFeN-based anisotropic magnetic powder, water, and a phosphate compound to adjust a pH of the slurry to a range from 1 to 4.5 to form an SmFeN-based anisotropic magnetic powder having a surface on which a phosphate coating is formed; and oxidizing by heat treating the SmFeN-based anisotropic magnetic powder having the surface on which the phosphate coating is formed, in an oxygen-containing atmosphere at a temperature in a range of 200° C. to 330° C., to form the phosphate-coated SmFeN-based anisotropic magnetic powder.

公开(公告)号：US20230374257A1

公开(公告)日：2023-11-23

申请号：US18318924

申请日：2023-05-17

Applicant: NICHIA CORPORATION

Inventor： Shuichi TADA ,  Takashi ASADA ,  Masahiro ABE

IPC: C08K3/08 ,  C08L63/00 ,  H01F1/059 ,  H01F1/06 ,  C08G59/50

CPC classification number: C08K3/08 ,  C08L63/00 ,  H01F1/059 ,  H01F1/06 ,  C08G59/5033 ,  C08K2201/01 ,  C08K2201/005

Abstract: A method, including: preparing at least one magnetic powder having an average particle size that is at least 1 μm but not more than 10 μm, at least one thermosetting resin, and at least one curing agent, wherein at least one of the thermosetting resin and the curing agent includes at least one monomer having a melting point that is higher than 70° C. but not higher than 140° C., and wherein an amount of the monomer having the melting point that is higher than 70° C. but not higher than 140° C. is at least 33% by volume but not more than 100% by volume of a combined amount of the thermosetting resin and the curing agent; and obtaining a magnetic powder-containing resin composition by kneading the magnetic powder, the thermosetting resin, and the curing agent at a temperature of higher than 70° C. but not higher than 140° C. and then lowering the temperature.

公开(公告)号：US20220157500A1

公开(公告)日：2022-05-19

申请号：US17588117

申请日：2022-01-28

Applicant: NICHIA CORPORATION

Inventor： Shuichi TADA ,  Satoshi YAMANAKA

IPC: H01F1/153 ,  H01F1/053 ,  C08K5/09 ,  C08L71/10 ,  C08L23/12 ,  C08L51/06 ,  H01F1/059

Abstract: The present invention relates to a composition for bonded magnets having good hot water resistance and a method of manufacturing the composition. The method of manufacturing a composition for bonded magnets includes: obtaining a first kneaded mixture by kneading a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin; and obtaining a second kneaded mixture by kneading the first kneaded mixture with a polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower, wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, the amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and the total amount of the polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.

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.