MONITORING METHOD FOR MOLDING CONDITION

摘要

PURPOSE:To monitor exactly the injection conditions of a molten metal into a casting mold of a die casting machine by detecting the stroke length of an injection cylinder for the molten metal on the basis of a stroke shaft and displaying the relation with the injection time in the stage of monitoring the molding conditions in the die casting machine. CONSTITUTION:The molten metal 10 in an injection sleeve 9 is press-cast by a plunger 4 connecting to the piston of the injection cylinder 1 into a casting cavity 13 in a metallic mold consisting of mating dies 11, 12. A magnetic scale 20 is attached to a striker 5 attached to a coupling 3 for the piston 2 and the plunger 4 and the magnetic pitch by the movement of the piston 2 is detected by a magnetic detector 6. The signal thereof is counted by a stroke detector 15 by which the stroke of the piston 2 of the cylinder 1 is detected and is used as a monitor element. The injection pressure is detected from the function of the stroke length with the time and is synthesized and displayed together with the stroke length as the monitor for the injection conditions of the molten metal.