| 摘要 |
PURPOSE:To produce the sintered compact less in bend by hanging a compact and exerting tensile load on the compact by a dead weight or a hook in the axial direction of a sintering direction at the time of sintering a cylindrical or columnar ceramic compact. CONSTITUTION:Through roles 2 are drilled at both sides of the ceramic roller compact 1, and a cord 3 is threaded through each hole 2, and the upper part thereof is tied to make a loop and hung on the graphite circular disk 4 having a hole at the center. The graphite dead weight 7 having a hole 6 is hung in the lower part and the compact 1 is sintered in this state. In this way, the sintered compact prevented from the bending stress due to the density unevenness and temp. unevenness of the sintered compact and less in bend is obtained since the stress always acts uniformly in the axial direction at the time of sintering. Therefore, the need of much finishing allowance for the time of grinding working is eliminated to thus reducing the cost of the product. |
