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Patent Searching and Data


Title:
DUST CORE AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/015724
Kind Code:
A1
Abstract:
A dust core produced by compression molding of a powder mixture consisting of an iron powder comprising atomized iron powder and reduced iron powder and a resin powder selected from among thermosetting polyimide resin powder, thermosetting polyimide resin powder mixed with polytetrafluoroethylene powder, thermoplastic polyimide resin powder and thermoplastic polyimide resin powder mixed with polytetrafluoroethylene powder, namely, compression molding of an iron powder combined with an insulating binder resin and heating the compression molding product. The dust core creates increased magnetic flux density, reduces iron loss, and is free from cracking or fracture at the time of cutting or drilling operation.

Inventors:
ISHII KEI (JP)
TAKADA TAMIO (JP)
MAKINO ISAO (JP)
SHIMIZU MASAKI (JP)
Application Number:
PCT/JP2003/008730
Publication Date:
February 19, 2004
Filing Date:
July 09, 2003
Export Citation:
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Assignee:
HITACHI POWDERED METALS (JP)
DENSO CORP (JP)
ISHII KEI (JP)
TAKADA TAMIO (JP)
MAKINO ISAO (JP)
SHIMIZU MASAKI (JP)
International Classes:
H01F1/26; H01F27/255; H01F41/02; (IPC1-7): H01F1/26; H01F27/24
Foreign References:
JP2002020801A2002-01-23
JPH11126721A1999-05-11
JPH076911A1995-01-10
JP2000036403A2000-02-02
JP2000124019A2000-04-28
JPH11354359A1999-12-24
US4808326A1989-02-28
EP1179607A22002-02-13
EP0619584A21994-10-12
EP1018753A12000-07-12
Other References:
See also references of EP 1542242A4
Attorney, Agent or Firm:
Maejima, Hajime (10-8 Ueno 7-chom, Taito-ku Tokyo, JP)
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