| 摘要 |
PURPOSE:To compact a green body for sintering under uniform density by solid-forming a mold composing of strong magnetic grain on forming surface of original shaping member, packing powdery raw material for sintering in a cavity shaped in the mold and compacting. CONSTITUTION:Non-permeable sheltering member 35 is brought into close contact with the forming face 6 in the original shaping member 5, and magnetic facing layer 36 is applied on the surface. Molding frame 14a is arranged at outer side of the above shelter member 35 and the packing material 37a composed of strong magnetic grain having good flowability is packed in the frame. Next, the above packing material 37a is solidified by electric magnet 15a and also the above shelter member 35 is stuck to the packing material 37a side and it is released from the original shaping member 5. The molds 16a, 16b having molding face 38 obtd. by the above method, are matched and the powdery raw material is packed in the shaped cavity 33. Next, after releasing magnetic force of the electric magnets 15a, 15b, the inner part of molding frames 14a, 14b is pressurized from the back face by pressurized members 22, 23. In this way, the green compact for sintering having complicated shape is formed by compacting under uniform density without any collapsing of the shape.
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