Method for producing a noncircular permanent magnet

Details Method for producing a noncircular permanent magnet Method for producing a noncircular permanent magnet

1987-11-27

1990-04-10

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Stratified or layered articles

29607, 29608, 722531, 148101, 264DIG58, 419 8, H01F 706, B22F 700

Patent

active

049158910

ABSTRACT:
A method for producing a noncircular magnet having asymmetric magnetic properties along axes thereof. A particle charge of composition from which the magnet is to be produced is placed in a container, heated and extruded within the container to compact the particle charge to substantially full density. The particle charge may include at least one rare earth element. The particle charge may be extruded through a noncircular extrusion die, specifically a rectangular die.

REFERENCES:
patent: 2123416 (1938-07-01), Graham
patent: 2960221 (1960-11-01), Albers et al.
patent: 2968835 (1961-01-01), Weston, Jr. et al.
patent: 2974791 (1961-03-01), Elkan
patent: 3256591 (1966-06-01), Muller
patent: 3922769 (1975-12-01), Brenan
patent: 4521360 (1985-06-01), Fiorentino
patent: 4533407 (1985-08-01), Das et al.
patent: 4597938 (1986-07-01), Matsuura et al.

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