Sintered magnet production mold, and sintered magnet production method using the same

A sintered magnet production method, comprising following successive processes:

• a filling process, in which a mold having a main body and a cove is filled with an alloy powder as a raw material, and subsequently, the cover is attached to the main body where a) the main body has a-1) a main cavity formed inwards from a main-body surface, including an upper cavity shaped like a rectangular parallelepiped and a lower cavity shaped like a downward-convex partial cylinder directly joined to a deeper end of the upper cavity, and a-2) a side cavity provided on an outside of an opening of the upper cavity on the main-body surface at each of two ends of the opening in an axial direction of the aforementioned partial cylinder, the side cavity formed inwards from the main-body surface and shaped like a partial cylinder having an axis parallel to an axis of the partial cylinder of the lower cavity, and where b) the cover has a base surface corresponding to the main-body surface and a convex rib bulging from the base surface, the convex rib having a shape corresponding to the two side cavities and a virtual cavity shaped like a partial cylinder connecting the two side cavities;
• an orienting process, in which the alloy powder is magnetically oriented by applying a magnetic field to the alloy powder without applying pressure;
• and
• a sintering process, in which the alloy powder is sintered by heating the alloy powder to a sintering temperature without applying pressure.