Title:
リング型磁石成形体の製造装置およびリング型焼結磁石の製造方法
Document Type and Number:
Japanese Patent JP4279757
Kind Code:
B2
Abstract:
An apparatus for manufacturing a ring-shaped powder compact (100) includes a ring-shaped die (80) having magnetic property formed by combining a plurality of arch-shaped members (81, 82, 83, 84), a lower core section (93) placed inside a curved inner surface of the die (80), and lower and upper punches (91, 92) for pressurizing both the die (80) and magnetic powder filled into a cavity formed between the die (80) and the lower core section (93) in an axial direction of the die (80). The curved inner surface of the die (80) varies in cross-sectional shape from one position to next along the axial direction of the die (80) at least in part along the axial direction. A ring magnet manufacturing method includes filling the magnetic powder into the cavity and producing the ring-shaped powder compact (100) by pressurizing the magnetic powder in the cavity in the axial direction by means of the lower and upper punches (91, 92) while applying a radially orienting magnetic field to the magnetic powder, and sintering the ring-shaped powder compact (100).
Inventors:
Cormorant fishing
Taizo Iwami
Yuji Nakahara
Taizo Iwami
Yuji Nakahara
Application Number:
JP2004275176A
Publication Date:
June 17, 2009
Filing Date:
September 22, 2004
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01F41/02; H02K1/27; H02K15/03
Domestic Patent References:
| JP9035933A | ||||
| JP7075321A | ||||
| JP11234930A | ||||
| JP5271705A | ||||
| JP9097731A | ||||
| JP8155698A | ||||
| JP57146499A | ||||
| JP11300497A | ||||
| JP2004007960A | ||||
| JP2004077647A | ||||
| JP2003017309A |
Attorney, Agent or Firm:
Keigo Murakami
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo