Method of manufacturing a resin bound magnet
AssigneeSankyo Seiki Mfg. Co., Ltd.
InventorsTakafumi Kuwazawa, Shigeru Nishida
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Abstract
A method of manufacturing a resin bound magnet comprising, mixing and kneading a powdered magnetic material and a rubber modified epoxy resin obtained from the addition polymerization of an epoxy resin and a butadiene or nitrile rubber and thereafter molding and setting the kneading mixture into a desired shape. The magnets prepared by the present invention exhibit permanent deformation under low compressive force, are soft and heat resistant and yet highly elastic and possess low dynamic exothermic properties and excellent low temperature characteristics. In addition, the inventive magnets exhibit excellent radial compression strength and other mechanical properties.
Claims10
A resin bound magnet comprising a homogenous mixture of a powdered magnetic material and from 2 to 4 weight percent based on the weight of the magnetic material of a cured, rubber-modified epoxy resin wherein the rubber component is about 5 to 30 weight percent of a butadiene or nitrile rubber, based on the weight of the resin.
Dependencies are inferred from the claim text.