| 简介 |
The present invention provides a method for producing a rare earth sintered magnet and a molding device therefor that can stably mold molded bodies with less variation in unit weight. Provided is a method for producing a rare earth sintered magnet, including the steps of : 1) preparing a slurry that includes an alloy powder containing a rare earth element, and a dispersion medium; 2) disposing an upper punch and a lower punch in respective through holes provided in a die, thereby preparing a plurality of cavities enclosed by the die, and the upper punch and the lower punch, at least one of the upper punch and the lower punch being movable toward and away from the other one, the upper punch and the lower punch including an outlet for discharging the dispersion medium of the slurry; 3) applying a magnetic field in each of the cavities by an electromagnet in a direction substantially parallel to a direction in which at least one of the upper punch and the lower punch is movable, and then supplying the slurry into the plurality of cavities via a plurality of slurry supply paths extending from an outer peripheral side surface of the die to each of the cavities without being branched; 4) producing a molded body of the alloy powder in each of the cavities by press molding in the magnetic field in which the upper punch and the lower punch come closer to each other while applying the magnetic field; and 5) sintering the molded body. |
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