Nichia Corporation

Muneo Yamamoto

Michiya Kume

Shuichi Tada

Kohei Ihara

Shinji Yoshima

Akihiro Imayama

In a method for manufacturing a cylindrical bonded magnet, a molding space having a cylindrical shape is filled with a bonded magnet composition containing a magnetic material and a resin. The magnetic material disposed in the molding space is magnetically oriented using an orientation magnet. The orientation magnet includes a first permanent magnet and a second permanent magnet. The first and second permanent magnets are disposed such that same poles are opposite each other in the axial direction.

Method of manufacturing cylindrical bonded magnet and manufacturing equipment for cylindrical bonded magnet

A cylindrical bonded magnet is provided which is multipolar-magnetized in the axial direction and can be produced with high productivity. The cylindrical bonded magnet includes magnetic powder and resin. The cylindrical bond magnet is an integrally formed member. The cylindrical bond magnet is magnetized so that a plurality of N and S poles are alternately provided in the axial direction. In the cylindrical bonded magnet, a totally even number of at least four N and S poles are alternately provided. The surface magnetic flux density distribution has a substantially sinusoidal wave with the both ends of the sinusoidal wave corresponding to nodes when the surface magnetic flux of the cylindrical bonded magnet is measured as viewed from the side surface of the cylindrical bond magnet along the axial direction.

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Anan, Japan

Muneo Yamamoto