SINTERED MOVABLE IRON-CORE AND METHOD OF MANUFACTURING THE SAME

Title:

SINTERED MOVABLE IRON-CORE AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/2005/029515

Kind Code:

A1

Abstract:

A movable iron-core for an electromagnetic actuator integrally formed by fitting one end of a shaft member having an inner hole and formed of a soft magnetic material. The shaft member is formed of a ferromagnetic steel material, the outer peripheral member is formed of a sintered member, and the shaft member and the outer peripheral member are formed integrally with each other by sintering bonding. Thus, excellent magnetic characteristics can be provided for the overall movable iron-core, excellent magnetic attraction force, wear resistance, and fatigue strength can be realized for the movable iron-core, and an electromagnetic actuator with high responsiveness which is requested in recent years can be manufactured.

Inventors:

ASAKA KAZUO (JP)
AKAO TSUYOSHI (JP)
HAMANO AYA (JP)

Application Number:

PCT/JP2004/013445

Publication Date:

March 31, 2005

Filing Date:

September 15, 2004

Export Citation:

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Assignee:

HITACHI POWDERED METALS (JP)
DENSO CORP (JP)
ASAKA KAZUO (JP)
AKAO TSUYOSHI (JP)
HAMANO AYA (JP)

International Classes:

H01F7/08; H01F3/08; (IPC1-7): H01F7/16; F16K31/06

Foreign References:

EP0922520A1

1999-06-16

Other References: