COMPOSITION FOR BONDED RARE-EARTH PERMANENT MAGNET, BONDED RARE-EARTH PERMANENT MAGNET AND METHOD FOR MANUFACTURING BONDED RARE-EARTH PERMANENT MAGNET

摘要

A composition for a rare earth bonded magnet, the rare earth bonded magnet and the method for manufacturing the rare earth bonded magnet are provided that produce little decline in mechanical strength caused by the addition of a lubricant and have excellent molding properties. The rare earth bonded magnet of the present invention is manufactured from the composition for the magnet that contains rare earth magnetic powder, binding resin containing thermoplastic resin, and fluorine-based resin powder, by compaction molding, extrusion molding or injection molding. The fluorine-based resin powder has the properties of improving mainly lubrication between a molding and a metallic mold. The content of the fluorine-based resin powder in the composition for the rare earth bonded magnet is preferably less than 20 vol% relative to the thermoplastic resin, and the particle diameter of the fluorine-based resin powder is preferably 2-30 mu m.