TO RARE-EARTH BOND MAGNET, MANUFACTURING METHOD FOR THE SAME AND MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a rare-earth bond magnet adopting high heat-resistance resin such as polyphenylene sulfide as thermoplastic resin which satisfies a requirement of necessitating antirust processing of magnet powder and neogenesis face occurring suppressing means to avoid deterioration of magnetic characteristics of the rare-earth bond magnet and secular change (deterioration) under the condition that the environmental temperature of the manufacturing process is higher than prior arts.SOLUTION: A weather resistance coating 2 is formed on rare-earth magnet powder 1, and then a sliding coating is formed on the weather resistance coating 2 to prepare sliding magnet powder 4. The coating portion of the rare-earth magnet powder 1 contains weather resistance (antirust material) as a main component of the coating layer of the lowermost layer on a side contacted with the surface of the rare-earth magnet powder and sliding material as a main component of the coating layer of the uppermost layer of the coating portion.SELECTED DRAWING: Figure 1