PURPOSE: To efficiently produce a cast product in a short cycle by using an automatic molten metal supplying device to execute high speed tilting movement, changing over to low speed tilting movement after once bringing a ladle into contact with the molten metal surface level and drawing the molten metal.

CONSTITUTION: At first, by working a motor 17 for tilting the ladle in the automatic molten metal supplying device 1, during a period from the time point E when the ladle 14 reaches the starting point 30 of the tilting movement to the time approaching the molten metal 5 surface level, the tilting of the is executred at a high speed. At the time of completing the tilting at a high speed, the ladle 14 is made not to touch the molten metal surface. Successively, the ladle 14 is changed over to the tilting movement at a low speed and tilted in a preset tilting posture J as it is and the tilting of the ladle 14 is once stopped. At the time of filling up molten aluminum 5 in a ladle 14, the ladle is returned back by the movement of J → I → H → G → F →E → in this order to the reference point 30 for the starting of the tilting. At this time, the necessary quantity of the molten Al 5 for the cast product of the die casting is prepared in the ladle 14 and thereafter, the ladle 14 is returned back to the horizontal posture E.