| 摘要 |
PURPOSE:To obtain a rubber permanent magnet having strong attracting force without losing processability with the aid of inexpensive magnetic powder by a method wherein the second magnetization is done at the vicinity of the end section in the longitudinal direction of an attracting plane in the nearly same direction as that of the first magnetization after performing the first magnetization. CONSTITUTION:A rubber permanent magnet formed in rectangle is firstly maggetized by a magnetizing device having parallel magnetic poles. As to magnetization, a static magnetic field or a pulse-like magnetic field such as capacitor discharge may be acceptable by the kind of a DC power source. Next, the second magnetization is applied to the rubber permanent magnet completed the first magnetization by a magnetizing device providing an attracting surface with magnetic poles. The same condition and others as those for the first magnetization are applied. In this way, a rubber permanent magnet having strong attracting force can be manufactured with the aid of inexpensive magnetic powder and without losing processability. |
