| 摘要 |
PROBLEM TO BE SOLVED: To provide a die device which can manufacture an anisotropic multipolar plastic magnet having a stable magnetic characteristic. SOLUTION: In this die device in which a plurality of magnetic cores 15 formed of a ferromagnetic material and permanent magnets 16 are alternately arranged around a cavity 12 so that the magnetic poles of the magnets 16 become the same pole N or S on both sides of each core 15, the front end faces of the cavity-side end sections of the cores 15 are protruded toward the center of the cavity 12 and formed in a circular-arcuate shape along the periphery of the cavity 12. |
