Title:
POWDER MAGNETIC CORE PRODUCTION METHOD AND POWDER MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2022/071290
Kind Code:
A1
Abstract:
This powder magnetic core is produced by applying pressure to magnetic powder in a mold while heating same at a prescribed temperature. The magnetic powder has at least a portion thereof covered with a covering agent. The mold comprises a die, an upper punch, and a lower punch. The upper punch is positioned vertically above the lower punch. The mold is provided with a low-temperature section and a high-temperature section. The temperature in the low-temperature section is lower by at least 10°C than that in the high-temperature section.
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Inventors:
YAMAKI MAKOTO (JP)
ONISHI NAOTO (JP)
URATA AKIRI (JP)
ONISHI NAOTO (JP)
URATA AKIRI (JP)
Application Number:
PCT/JP2021/035565
Publication Date:
April 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
TOKIN CORP (JP)
International Classes:
B22F1/00; B22F3/00; B22F3/14; B30B11/02; C22C38/00; H01F1/153; H01F1/24; H01F41/02
Foreign References:
| JP2017188677A | 2017-10-12 | |||
| JP2017073447A | 2017-04-13 | |||
| JPH04162503A | 1992-06-08 | |||
| JPH03188202A | 1991-08-16 | |||
| JP2016162947A | 2016-09-05 | |||
| JP2013214665A | 2013-10-17 | |||
| JP2004338166A | 2004-12-02 | |||
| JP2019179881A | 2019-10-17 |
Attorney, Agent or Firm:
YAMAZAKI Takuya (JP)
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