| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical bonded magnet that generates magnetic force in an inner peripheral direction.SOLUTION: A method of manufacturing a cylindrical bonded magnet comprises the steps of: filling a cylindrical molding space with a bonded magnet composition including a magnetic material and a resin; and performing magnetic alignment of the magnetic material with an alignment magnet disposed on the inner peripheral side of the molding space and extruding a molten bonded magnet composition in an axial direction of the molding space. The alignment magnet is formed by arranging a second permanent magnet adjacent to a first permanent magnet in an axial direction of the first permanent magnet. The first permanent magnet is configured so that N poles and S poles alternately appear along the inner periphery of the molding space. The second permanent magnet is configured so that N poles and S poles alternately appear, the same poles of the first and second permanent magnets facing each other. |
