| 摘要 |
PURPOSE:To simplify the saturation multipolar magnetization by making a rare earth magnet anisotropic in a cylindrical shape and a radial orientation, and performing extrusion molding. CONSTITUTION:As the magnet powder, an inter-rare earth metal compound alloy containing a rare earth metal such as yttrium and a transition metal such as iron is used. As the organic resin, a polyamide resin such as thermoelectric nylon 6, 12 is preferable. As to the mixing ratio of the magnetic powder and the organic resin, since the magnetic powder has a low magnetic performance if it is 50vol% or less, and extrusion molding cannot be applied it is exceeds 75vol%. Thus, the fill of the magnet powder is preferably in the range of 50vol%-75vol%. The above mixture is heated to about 80 deg.C-300 deg.C. After it becomes fluid, it is made to pass through a metal mold, simultaneously it is provided with a magnetic orientation, and then it is cooled and set to be made into a pipe. Here, the magnetic field is generated so that it becomes radial. |
