Method of producing an anisotropic bonded magnet

Details Method of producing an anisotropic bonded magnet Method of producing an anisotropic bonded magnet

1996-01-22

1999-12-28

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Producing or treating magnetic product precursor thereof

264442, B29C 3502

Patent

active

060077573

ABSTRACT:
Compression molding suitable anisotropic magnet powder had not been established facing the difficulty of contradiction of high density and magnet powder alignment. By applying both magnetic field and pressure at the moment when the resin is melted into liquid state by heating, both high density and a high degree of magnet powder alignment are attained. Furthermore, application of degassing and ultrasonic vibration were found to be effective. An anisotropic bonded magnet with the maximum energy of more than 20 MGOe, in other words, more than 80% of the theoretical value of maximum energy product, is obtained.

REFERENCES:
patent: 2188091 (1940-01-01), Baermann, Jr.
patent: 3477961 (1969-11-01), Castagna et al.
patent: 3867299 (1975-02-01), Rohatgi
patent: 3933536 (1976-01-01), Doser et al.
patent: 4141943 (1979-02-01), Houska
patent: 4562019 (1985-12-01), Inoue
patent: 5114604 (1992-05-01), Ishii et al.

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