| 简介 |
PROBLEM TO BE SOLVED : To provide a pole-oriented magnet having an optimal magnetization waveform in a high-flux rare earth pole anisotropic ring magnet, a raw material compound therefor, a molding metal die and a molding method using them.
SOLUTION : An anisotropic magnetic powder compounded by a thermally curable resin is used as a raw material, and the raw material is oriented and injection-molded in such a manner that the raw material forms a magnetic pole 2, by a metal molding in which a core pin is disposed within an inner diameter of a metal mold die. The material of a core pin 5 is changed at such a time, such that a magnetic flux direction within a cavity 6 is changed and a magnetization waveform of a molded magnet 1 can be controlled from a rectangular wave to a sinusoidal wave and a triangular wave. A core pin in which a magnetic substance is inserted into a non-magnetic ring is used, thereby obtaining similar effects.
SELECTED DRAWING : Figure 1
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