| 摘要 |
PURPOSE:To obtain a cylinder radial anisotropic magnet wherein the length exceeds two times the internal diameter of an inner cylinder, and joints are not present, and its manufacturing method which is new and excellent in external diameter precision and massproductivity. CONSTITUTION:An extrusion molding equipment provided with a pair of ring type magnetic poles 8, 9 is used, into which ferromagnetic continuous length material 2 is continuously introduced. While radial magnetic field is applied to said material 2 from the above magnetic poles 8, 9, composition for a synthetic resin magnet is extruded toward said material 2 from a head part 5, and formed in a magnetic cylinder type. After the composition for the synthetic resin magnet of a cylinder type is radially oriented, said composition is hardened together with the ferromagnetic continuous length material 2. |
