发明申请
US20050219027A1 Method for manufacturing coil-embedded dust core and coil-embedded dust core
有权
线圈嵌入式防尘芯和线圈嵌入式防尘芯的制造方法
- 专利标题: Method for manufacturing coil-embedded dust core and coil-embedded dust core
- 专利标题(中): 线圈嵌入式防尘芯和线圈嵌入式防尘芯的制造方法
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申请号: US11140348申请日: 2005-05-26
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公开(公告)号: US20050219027A1公开(公告)日: 2005-10-06
- 发明人: Sadaki Satoh , Junetsu Tamura , Hideharu Moro , Tsuneo Suzuki
- 申请人: Sadaki Satoh , Junetsu Tamura , Hideharu Moro , Tsuneo Suzuki
- 专利权人: TDK CORPORATION
- 当前专利权人: TDK CORPORATION
- 优先权: JP2002-079044 20020320
- 主分类号: B22F7/08
- IPC分类号: B22F7/08 ; A61B8/08 ; H01F17/04 ; H01F41/10 ; H01F27/02
摘要:
It is an object to provide a method for manufacturing a coil-embedded dust core with a small variation in inductance value with efficiency and the like. A step (a) of charging soft magnetic metal powder including an insulating material, composing a green body 10, so as to cover a coil 1, and a step (b) of compacting the soft magnetic metal powder covering the coil 1 in an axial direction of the coil 1 are included, and in the step (b), the soft magnetic metal powder is compacted while an amount of the soft metal powder charged into the part corresponding to the winding section is kept smaller than an amount of the soft magnetic metal powder charged into the other part that are not corresponding to the winding section, with an upper surface or a lower surface of the winding section as a reference. Thereby, a coil-embedded dust core with entirely uniform density can be obtained, and according to the coil-embedded dust core with entirely uniform density, a variation in inductance value is reduced and it becomes possible to obtain a predetermined inductance value with stability.
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