METALLIC MOLD CASTING METHOD

摘要

PURPOSE: To improve the timing of an on-and-off supplying of inert gas into a product part and to improve the quality of the cast product by detecting molten metal surface level with a level sensor when the poured molten metal reaches the preset position of the product part and controlling the on-and-off supplying of inert gas with this detected signal. CONSTITUTION: A control mechanism 50 is composed of the level sensor 51 for detecting the molten metal surface level of the product part 3, a display part 52 for displaying and storing the molten metal surface level with the detected signal of this level sensor 51 and a control part 53 for controlling a gas and air supplying part 20 and a molten metal pouring mechanism 30 based on the detected signal of the level sensor 51. The level sensor 51 is a non-contacting type level sensor for measuring the molten metal surface level through an observing hole extending upward from the product part 3 and enabling direct observation of the product. The control part 53 concretely detects the molten metal surface level with the level sensor 51 when the poured molten metal reaches plural preset positions L1-L5 of the product part 3, and controls a four-way valve so as to control the supplying of inert gas.