Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1991-02-14
1992-09-08
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
148101, 148302, 264DIG58, B29C 4517
Patent
active
051456141
ABSTRACT:
The process for preparing a multi-polar anisotropic resinous magnet by preparing a multi-polar anisotropic resinous magnet by injecting a liquid reaction curable resin containing a magnetic powder into a mold for molding and applying a magnetic field for multiple-pole orientation thereon; the reaction curable resin is injected into a mold for molding set between a large number of magnetic poles arranged at predetermined intervals including magnetic poles with freely convertible magnetism and back yokes opposed to these magnetic poles; a magnetic flux flows in one direction to the back yokes with the respective magnetic poles being made the same polarity, maintaining the resin under uncured state, to localize and orient the magnetic powder in the resin corresponding to the magnetic flux. The reaction curing of the resin is completed while applying a magnetic field obtained by converting the magnetism of the magnetic poles to the desired multi-polar anisotropy of the resinous magnet, thereby localizing and orienting the magnetic powder within the resin corresponding to the magnetic field.
REFERENCES:
patent: 4327346 (1982-04-01), Tada et al.
patent: 4604042 (1986-08-01), Tanigawa et al.
patent: 4678616 (1987-07-01), Kawashima
patent: 4919858 (1990-04-01), Newton et al.
Canon Kabushiki Kaisha
Eastley Brian J.
Silbaugh Jan H.
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