| 摘要 |
PURPOSE:To obtain a strong multipolar belt form rubber magnet which is approximate to be fully saturated magnetization by a method wherein a ferromagnetic substrate of anisotropic and isotropic belt or sheet form is magnetized in uniform direction, and then a second magnetization is performed along the direction of magnetization. CONSTITUTION:A flexible belt form substrate is formed by kneading flexible synthetic resin and rubber of 15-18% in ferromagnetic powder, and the first magnetizing process is performed in the direction of parallel of vertical to substrate surface using a magnetizer of unipolarity surface opposing type 4 or heteropolarity surface opposing type 5. When the isotropic sheet rubber magnet 11 of 0.8mm. in thickness which is magnetized in the direction of arrow 12 is placed on a multipolar belt form magnetize 13 of 3mm. magnetizing pitch and the second magnetizing process is performed thereon, the width of magnetization of the same direction in the first and the second magnetization is widely formed, the reverse-directed part is narrowly formed, but the degree of magnetization on their surfaces is increased. Also, after an anisotropic sheet rubber magnet 14 is magnetized in the direction of the arrow 15 in the diagram in longitudinal direction of 0.2mm. in thickness, it is placed on a multipolar belt form magnetizer 16 of the pitch of 2mm., and when the above is magnetized by applying a large current in a heteropolar-to-heteropolar state, the attracting force of approximately twice as much as the one obtained by the conventional method can be obtained. |
