METHOD OF MANUFACTURING ANISOTROPIC BOND MAGNET

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PROBLEM TO BE SOLVED : To provide a method of manufacturing anisotropic bond magnet in which orientations can be easily converged on a pole and which is assembled on a rotor to reduce cogging torque. SOLUTION : The manufacturing method includes a first step of filling a rubber mold having a U-shaped cavity with a compound granule of rare earth magnet powder, thermosetting resin and thermoplastic resin to mold the compound granule to provide thereto a magnetic field orientation in a parallel magnetic field; and a second step of pressing the rubber mold with a die which has a pressing face with a curvature to deform the magnet molding in the cavity into an arc shape so as to cause orientation directions 11 of magnetic molding to converge on a pole. Preferably, the second step is carried out in a state the compound granule is heated higher than a softening temperature of the thermoplastic resin. COPYRIGHT : (C)2015, JPO&INPIT