MOLD ROTATIONAL TYPE GRAVITY CASTING METHOD

摘要

PURPOSE:To prevent the occurrence of entrapment of air caused by waving of molten metal in a cavity at the time of filling the molten metal once stored in a hopper into the cavity in a mold by rotating the mold provided with a hopper. CONSTITUTION:At the time of storing the molten metal by pouring into the hopper 6, the molten metal is allowed to flow out to a runner 5 in the mold 1 from the hopper 6 in a small quantity to previously fill the runner 5 with the molten metal 9. The mold 1 is rotated in this condition and then, the molten metal is filled into the cavity 4 from the hopper 6 by the head between the molten metal surface in the hopper 6 and the molten metal surface in the mold 1.