Invention Grant
- Patent Title: Soft magnetic material, compressed powder magnetic core and method for producing compressed power magnetic core
- Patent Title (中): 软磁材料，压缩粉磁芯及压缩粉磁芯生产方法
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Application No.: US11574555Application Date: 2005-08-31
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Publication No.: US07678174B2Publication Date: 2010-03-16
- Inventor: Terukazu Tokuoka , Kazuhiro Hirose , Haruhisa Toyoda , Takao Nishioka , Kouhei Sawada
- Applicant: Terukazu Tokuoka , Kazuhiro Hirose , Haruhisa Toyoda , Takao Nishioka , Kouhei Sawada
- Applicant Address: JP Osaka
- Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: Darby & Darby P.C.
- Priority: JP2004-254650 20040901
- International Application: PCT/JP2005/015871 WO 20050831
- International Announcement: WO2006/025430 WO 20060309
- Main IPC: B22F3/02
- IPC: B22F3/02 ; H01F1/26
Abstract:
A soft magnetic material has an iron based powder that has an insulating coating on the surface and an ester wax. The ester wax is added in an amount not less than 0.02% by weight and not more than 0.6% by weight in relation to the soft magnetic material. Consequently, seizure between a metal mold and a material to be molded at the time of molding can be suppressed and the arising of a black residue can be prevented.
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