公开(公告)号：US11651893B2

公开(公告)日：2023-05-16

申请号：US16584887

申请日：2019-09-26

Applicant: NICHIA CORPORATION

Inventor： Masahiro Abe ,  Kohei Ihara

IPC: H01F41/02 ,  H01F1/057 ,  B29C45/26

CPC classification number: H01F41/028 ,  B29C45/26 ,  H01F1/0577

Abstract: Provided are molds for polar anisotropic ring-shaped bonded magnet molded articles which enable the production of bonded magnet molded articles with a high degree of roundness and only slight distortion, without the need for mold modification and preparation of a test mold, and a method of preparing such molds. The present invention relates to a method of preparing a mold for a polar anisotropic ring-shaped bonded magnet molded article, the method including: 1) determining the shrinkage length (Tc) of a desired polar anisotropic ring-shaped bonded magnet molded article using the following equation: Tc=T×(α1/100−α2/100); 2) determining the radius (Dm) of a magnetic pole portion of a mold cavity using the following equation: Dm=D/(1−α2/100); and 3) defining the outer peripheral shape of the mold cavity from the Tc, the Dm, and the number (P) of magnetic poles of the molded article.

公开(公告)号：US12230438B2

公开(公告)日：2025-02-18

申请号：US17455155

申请日：2021-11-16

Applicant: NICHIA CORPORATION

Inventor： Satoshi Yamanaka ,  Takayuki Yano ,  Shuichi Tada ,  Masahiro Abe ,  Kenta Iwai

IPC: B29C45/00 ,  B29B7/88 ,  H01F1/057 ,  H01F41/02 ,  B29K77/00 ,  B29K505/00

Abstract: A method of producing a compound for bonded magnets, the method including: heat-curing a thermosetting resin and a curing agent having a ratio of the number of reactive groups of the curing agent to the number of reactive groups of the thermosetting resin of at least 2 but not higher than 11 to obtain an additive for bonded magnets; and kneading the additive for bonded magnets, magnetic powder, and a thermoplastic resin to obtain a compound for bonded magnets in which a filling ratio of the magnetic powder is at least 91.5% by mass.

公开(公告)号：US12040128B2

公开(公告)日：2024-07-16

申请号：US18296959

申请日：2023-04-06

Applicant: NICHIA CORPORATION

Inventor： Masahiro Abe ,  Kohei Ihara

IPC: H01F41/02 ,  B29C45/26 ,  H01F1/057

CPC classification number: H01F41/028 ,  B29C45/26 ,  H01F1/0577

Abstract: Provided are molds for polar anisotropic ring-shaped bonded magnet molded articles which enable the production of bonded magnet molded articles with a high degree of roundness and only slight distortion, without the need for mold modification and preparation of a test mold, and a method of preparing such molds. The present invention relates to a method of preparing a mold for a polar anisotropic ring-shaped bonded magnet molded article, the method including: 1) determining the shrinkage length (Tc) of a desired polar anisotropic ring-shaped bonded magnet molded article using the following equation: Tc=T×(α1/100−α2/100); 2) determining the radius (Dm) of a magnetic pole portion of a mold cavity using the following equation: Dm=D/(1−α2/100); and 3) defining the outer peripheral shape of the mold cavity from the Tc, the Dm, and the number (P) of magnetic poles of the molded article.

公开(公告)号：US20230207166A1

公开(公告)日：2023-06-29

申请号：US18146752

申请日：2022-12-27

Applicant: NICHIA CORPORATION

Inventor： Masahiro Abe ,  Satoshi Yamanaka ,  Shuichi Tada ,  Kenta Iwai

IPC: H01F1/059 ,  H01F41/02 ,  B22F1/16 ,  B22F1/145 ,  B22F1/142

CPC classification number: H01F1/059 ,  H01F41/026 ,  B22F1/16 ,  B22F1/145 ,  B22F1/142 ,  B22F2201/03 ,  B22F2302/45 ,  B22F2301/45 ,  B22F2998/10

Abstract: A method of producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method including performing a phosphate treatment including adding an inorganic acid to a slurry containing a raw material SmFeN-based anisotropic magnetic powder, water, a phosphate compound, and a rare earth compound so that the slurry is adjusted to have a pH of at least 1 and not higher than 4.5 to obtain a phosphate-coated SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.

公开(公告)号：US11646154B2

公开(公告)日：2023-05-09

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 ,  H01F7/02 ,  H01F1/059 ,  C08L77/02 ,  H01F41/02 ,  B29C45/00 ,  H01F1/08 ,  H01F1/113 ,  B29K77/00 ,  B29K683/00 ,  B29K505/12 ,  B29K105/16 ,  B29K105/00 ,  B29C45/14 ,  B22F7/08 ,  B22F3/22

CPC classification number: H01F1/0533 ,  B29C45/0013 ,  C08L77/02 ,  H01F1/059 ,  H01F1/083 ,  H01F1/113 ,  H01F7/02 ,  H01F41/0266 ,  B22F3/225 ,  B22F7/08 ,  B22F2998/10 ,  B29C45/1459 ,  B29K2077/00 ,  B29K2105/0044 ,  B29K2105/16 ,  B29K2505/12 ,  B29K2683/00 ,  B29K2995/0008 ,  B22F2998/10 ,  B22F1/10 ,  B22F3/225

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：US11056255B2

公开(公告)日：2021-07-06

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 ,  H01F7/02 ,  H01F1/059 ,  H01F41/02 ,  C08L77/02 ,  B29C45/00 ,  H01F1/08 ,  H01F1/113 ,  B29K77/00 ,  B29K683/00 ,  B29K505/12 ,  B29K105/16 ,  B29K105/00 ,  B29C45/14 ,  B22F7/08 ,  B22F3/22

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.