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公开(公告)号：US10204725B2
公开(公告)日：2019-02-12
申请号：US15445649
申请日：2017-02-28
Applicant: NTN CORPORATION
Inventor： Ikuo Uemoto , Shinji Miyazaki , Takuji Harano
IPC: H01F27/24 , H01F1/37 , H01F27/255 , H01F3/10 , H01F17/04 , H01F3/08 , H01F41/00 , H01F41/02 , H01F27/28
Abstract: The present invention provides a composite magnetic core, containing magnetic powders poor in its moldability, which can be configured arbitrarily and has a magnetic characteristic excellent in direct current superimposition characteristics and a magnetic element composed of the composite magnetic core and a coil wound around the circumference thereof. A compressed magnetic body (2) obtained by compression-molding magnetic powders is combined with an injection-molded magnetic body (3) obtained by mixing a binding resin with magnetic powders having surfaces thereof electrically insulated and by injection-molding a mixture of the magnetic powders and the binding resin. The compressed magnetic body (2) is press-fitted into the injection-molded magnetic body (3) or bonded thereto at a combining portion thereof to obtain the combined body. The combined body is composed of the injection-molded magnetic body (3) constituting a housing in which the compressed magnetic body (2) is disposed.
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Patent Agency Ranking
公开(公告)号：US20150179323A1
公开(公告)日：2015-06-25
申请号：US14417095
申请日：2013-07-24
Applicant: NTN CORPORATION
Inventor： Ikuo Uemoto , Shinji Miyazaki , Takuji Harano
IPC: H01F3/08
CPC classification number: H01F1/37 , H01F3/08 , H01F3/10 , H01F17/04 , H01F27/255 , H01F27/2823 , H01F41/005 , H01F41/0246 , H01F2003/106
Abstract: The present invention provides a composite magnetic core, containing magnetic powders poor in its moldability, which can be configured arbitrarily and has a magnetic characteristic excellent in direct current superimposition characteristics and a magnetic element composed of the composite magnetic core and a coil wound around the circumference thereof. A compressed magnetic body (2) obtained by compression-molding magnetic powders is combined with an injection-molded magnetic body (3) obtained by mixing a binding resin with magnetic powders having surfaces thereof electrically insulated and by injection-molding a mixture of the magnetic powders and the binding resin. The compressed magnetic body (2) is press-fitted into the injection-molded magnetic body (3) or bonded thereto at a combining portion thereof to obtain the combined body. The combined body is composed of the injection-molded magnetic body (3) constituting a housing in which the compressed magnetic body (2) is disposed.
Abstract translation: 本发明提供一种复合磁芯，其含有成型性差的磁性粉末，其可以任意配置，并且具有优异的直流叠加特性的磁特性和由复合磁芯和缠绕在圆周上的线圈组成的磁性元件 其中。 将通过压缩成型磁粉获得的压缩磁体（2）与通过将粘合树脂与其表面电绝缘的磁粉混合而获得的注射成型磁体（3）和通过注射成型磁性混合物 粉末和粘合树脂。 将压缩磁体（2）压配合到注射成型磁体（3）中或者在其组合部分与其结合，以获得组合体。 组合体由构成压缩磁体（2）的壳体的注射成型磁性体（3）构成。
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公开(公告)号：US09976874B2
公开(公告)日：2018-05-22
申请号：US14904223
申请日：2014-07-02
Applicant: NTN CORPORATION
Inventor： Toru Takahashi , Tatsuo Nakajima , Hiroyuki Hakamata , Ikuo Uemoto , Shinji Miyazaki , Takuji Harano , Takayuki Oda
CPC classification number: G01D5/14 , G01D5/24438 , G01D5/2452 , G01D5/246
Abstract: A magnetic encoder device (3) of the present invention includes a base portion (33) having a mounting surface (33b) for mounting to a rotary shaft (2), a cored bar (35) fitted and fixed over the base portion (33), and a double-row magnetic encoder track (30) formed on the cored bar (35). Through movement of each of magnetic poles of the magnetic encoder track (30) over a region opposed to a magnetic sensor (4), an angle of the rotating rotary shaft is detected. The base portion (33) is formed of a sintered metal, and the mounting surface (33b) is subjected to sizing.
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公开(公告)号：US20150270050A1
公开(公告)日：2015-09-24
申请号：US14433002
申请日：2013-09-27
Applicant: NTN CORPORATION
Inventor： Ikuo Uemoto , Shinji Miyazaki , Takuji Harano , Natsuhiko Mori , Hiroyuki Noda
IPC: H01F27/255 , H01F1/22 , H01F41/02
CPC classification number: H01F27/255 , B22F1/0062 , B22F2998/10 , C22C2202/02 , H01F1/22 , H01F1/26 , H01F3/08 , H01F41/0246 , B22F3/02 , B22F9/04 , B22F2003/248
Abstract: The present invention provides a magnetic core which can be produced with improved productivity without increasing a material cost and has required magnetic and mechanical properties and a process for producing the same. The magnetic core is produced by compression molding and thereafter thermally hardening iron-based soft magnetic powder having resin films formed on surfaces of particles thereof. The resin film is an uncured resin film formed by dry mixing the iron-based soft magnetic powder and epoxy resin containing a latent curing agent with each other at a temperature not less than a softening temperature of the epoxy resin and less than a thermal curing starting temperature thereof. The iron-based soft magnetic powder having the resin films formed on the surfaces of the particles thereof is compression molded by using a die to produce a compression molded body. The compression molded body having the resin films formed on the surfaces of the particles thereof is thermally hardened at a temperature not less than the thermal curing starting temperature of the epoxy resin.
Abstract translation: 本发明提供一种磁芯，其可以在不增加材料成本的情况下以提高的生产率生产并且需要磁性和机械性能及其制造方法。 磁芯通过压缩成型制造，然后热硬化具有在其颗粒表面上形成的树脂膜的铁基软磁性粉末。 树脂膜是通过在不低于环氧树脂的软化温度的温度下将铁基软磁性粉末和含有潜在性固化剂的环氧树脂彼此干燥混合而形成的未固化树脂膜，并且小于热固化起始 温度。 通过使用模具将形成在其颗粒表面上的树脂膜的铁基软磁性粉末压缩成型以制造压塑体。 具有形成在其颗粒表面上的树脂膜的压模体在不低于环氧树脂的热固化起始温度的温度下热硬化。
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公开(公告)号：US10395813B2
公开(公告)日：2019-08-27
申请号：US14433002
申请日：2013-09-27
Applicant: NTN CORPORATION
Inventor： Ikuo Uemoto , Shinji Miyazaki , Takuji Harano , Natsuhiko Mori , Hiroyuki Noda
Abstract: The present invention provides a magnetic core which can be produced with improved productivity without increasing a material cost and has required magnetic and mechanical properties and a process for producing the same. The magnetic core is produced by compression molding and thereafter thermally hardening iron-based soft magnetic powder having resin films formed on surfaces of particles thereof. The resin film is an uncured resin film formed by dry mixing the iron-based soft magnetic powder and epoxy resin containing a latent curing agent with each other at a temperature not less than a softening temperature of the epoxy resin and less than a thermal curing starting temperature thereof. The iron-based soft magnetic powder having the resin films formed on the surfaces of the particles thereof is compression molded by using a die to produce a compression molded body. The compression molded body having the resin films formed on the surfaces of the particles thereof is thermally hardened at a temperature not less than the thermal curing starting temperature of the epoxy resin.
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公开(公告)号：US09620270B2
公开(公告)日：2017-04-11
申请号：US14417095
申请日：2013-07-24
Applicant: NTN CORPORATION
Inventor： Ikuo Uemoto , Shinji Miyazaki , Takuji Harano
CPC classification number: H01F1/37 , H01F3/08 , H01F3/10 , H01F17/04 , H01F27/255 , H01F27/2823 , H01F41/005 , H01F41/0246 , H01F2003/106
Abstract: The present invention provides a composite magnetic core, containing magnetic powders poor in its moldability, which can be configured arbitrarily and has a magnetic characteristic excellent in direct current superimposition characteristics and a magnetic element composed of the composite magnetic core and a coil wound around the circumference thereof. A compressed magnetic body (2) obtained by compression-molding magnetic powders is combined with an injection-molded magnetic body (3) obtained by mixing a binding resin with magnetic powders having surfaces thereof electrically insulated and by injection-molding a mixture of the magnetic powders and the binding resin. The compressed magnetic body (2) is press-fitted into the injection-molded magnetic body (3) or bonded thereto at a combining portion thereof to obtain the combined body. The combined body is composed of the injection-molded magnetic body (3) constituting a housing in which the compressed magnetic body (2) is disposed.
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