METHOD OF MANUFACTURING DUST CORE

Title:

METHOD OF MANUFACTURING DUST CORE

Document Type and Number:

Japanese Patent JP2011035005

Kind Code:

A

Abstract:

To provide a method of manufacturing a dust core, capable of reducing variations in filling amount of a metal magnetic powder to a molding die.

In manufacturing the dust core, first, the metal magnetic powder is mixed with a spherical silica powder (step S11). Then, the metal magnetic power is subjected to rust prevention processing (step S12), and then, a mixture of the metal magnetic powder and the spherical silica powder is mixed with a resin binder (step S13). The mixture of the metal magnetic powder, the spherical silica powder and the resin binder is dried to form a granulated body (step S14). Then, the granulated body is additionally mixed with the spherical silica powder (step S15), and further mixed with a lubricant such as zinc stearate (step S16). Then, compression molding is performed (step S17), and the resin binder is cured (step S18).

Inventors:

KIKUCHI TOSHIAKI
ANPO TOSHIYUKI
HIGURE KAZUYA
MIURA KAZUKI

Application Number:

JP2009176923A

Publication Date:

February 17, 2011

Filing Date:

July 29, 2009

Export Citation:

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Assignee:

TDK CORP

International Classes:

H01F1/24; B22F1/00; B22F1/02; B22F3/00; B22F3/02; H01F27/255; H01F41/02

Domestic Patent References:

JP2004332016A	2004-11-25
JP2002083709A	2002-03-22

Attorney, Agent or Firm:

Yoshiki Hasegawa
Yoshiki Kuroki
Takashi Mikami
Yasunori Ishizaka

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