Magnet powder-resin compound particles, method for producing...

Details Magnet powder-resin compound particles, method for producing... Magnet powder-resin compound particles, method for producing...

2004-07-20

2008-09-30

Chevalier, Alicia (Department: 1794)

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

C428S034100, C428S035700, C428S900000, C148S100000, C148S101000, C148S105000, C148S300000, C148S301000, C148S302000, C148S306000, C148S311000, C148S313000

Reissue Patent

active

RE040524

ABSTRACT:
The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average particle size defined by (a/b)/2 is 50-300 μm. They are produced by charging a mixture of rare earth magnet powder and a binder resin into an extruder equipped with nozzle orifices each having a diameter of 300 μm or less; extruding the mixture while blending under pressure though the nozzle orifices to form substantially cylindrical, fine pellets; and rounding the pellets by rotation.

REFERENCES:
patent: 4960469 (1990-10-01), Tanigawa et al.
patent: 5085715 (1992-02-01), Tokunaga et al.
patent: 132106 (1989-05-01), None
patent: 11-45816 (1989-06-01), None
patent: 10-4023 (1998-01-01), None
patent: 11-45816 (1999-02-01), None

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