| 摘要 |
PURPOSE:To manufacture a magnet roll which is a uniform anisotropic magnet by providing the anisotropic magnet roll manufacturing device with an inlet over the entire length of the bonded surface of a cavity, and injecting resin from the midpoint of the magnetic poles. CONSTITUTION:A metallic mold is constituted by bonding upper and lower metal mold pieces 10a and 10b, both of which have a semicylindrical cavity in its center; a magnetic field is applied around the bonded cylindrical cavity 13. The inlets 14a and 14b are the midpoint of the poles N-S where a magnet is formed in its central part, are formed over the entire length of the bonded surface 11 of the metal mold pieces 10a and 10b, and are extended to the cavity 13; the inlets 14a and 14b are constituted so as to be inclined at a prescribed angle to the normal line of the cavity 13, and the mixture of heated ferromagnetic powder and resin is injected. Therefore, an injecting distance is shortened, the length of time that the mixture is charged into the cavity 13 is shortened, and ununiform viscosity, caused by the temperature difference of the resin being the mixture, is eliminated. Thus, a uniform anisotropic magnetic field resin magnet free from variation in magnetic force can be formed. |
