METHOD AND DEVICE FOR CONTROLLING AUTOMATIC POURING DEVICE FOR DIE CASTING MACHINE

摘要

PURPOSE:To improve product quality by controlling the conveying speed to maintain the specified time since ladling until pouring and lading the molten metal again if the speed exceeds a permissible speed to prevent overcooling in pouring in the automatic control of ladle operation for a die casting machine. CONSTITUTION:The level of the molten metal in a crucible 171 is detected 321 by a detector 160 and a ladle 50 is moved by a conveying motor 30 and a tilting motor 150 to ladle the molten metal and to stand by 333 above the furnace. A conveyance command thetac is emitted in synchronization with the completion of die clamping of the die casting machine 1 so that the ladle stands by in a pouring position 301. The high-speed pouring is executed by a pouring command thetaA. The time since ladling 327 of the molten metal by the ladle 50 until the high-speed pouring 303 is controlled by the conveyance speed V to maintain the specified pouring temp. The ladle 50 is descended 339 at a low speed from the standby 333 position above the furnace so as to ladle the molten metal again when the speed V exceeds a permissible speed Vmax. The overcooling in the pouring is prevented by such automatic control by which the molten metal is poured always at the correct molten metal temp. and the quality of the product is stabilized and improved.