Method and apparatus for packing permanent magnet powder

Details Method and apparatus for packing permanent magnet powder Method and apparatus for packing permanent magnet powder

1990-04-13

1991-04-02

Hunt, Brooks H.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Powder pretreatment

419 32, 419 38, 419 66, 148103, 148104, 148105, 148108, B22F 100

Patent

active

050045806

ABSTRACT:
A method and apparatus for packing a permanent magnet powder wherein a solenoid coil is provided near the opening of a cylindrical molding space of a mold in such a manner that the direction of the central axis of the solenoid coil substantially coincides with the central axis of the molding space, and an alternating current magnetic field is applied, so that a permanent magnet powder above the opening is packed into the molding space. A magnetic pole may be provided in the center of the solenoid coil. The method of the present invention can be applied to not only a powder for a sintered magnet but also a powder for a bonded magnet.

REFERENCES:
patent: 4592889 (1986-06-01), Leupold et al.
patent: 4600555 (1986-07-01), Shimizu
patent: 4678634 (1987-07-01), Tawara et al.
patent: 4734253 (1988-03-01), Sato et al.
patent: 4776902 (1988-10-01), Ghandehari
patent: 4911882 (1990-03-01), Greewald
patent: 4931092 (1990-06-01), Cisar et al.

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