Apparatus for measuring injection speeds of die casting machines

摘要

Apparatus for measuring injection speeds of a die casting machine comprises a detecting device for detecting injection times at low and high speed injection strokes, calculating elements for calculating low and high injection speeds by dividing the low and high injection strokes by the injection times, and displaying elements for displaying the low and high injection speeds as average injection speeds. The injection time detecting device includes an elongated member having different magnetic characteristics, an element responsive to the characteristics to generate pulse signal, low and high speed injection limit switches, and a discriminating element for discriminating the period of the signal generated by the pulse signal generating element. The injection speeds of the die casting machine can be measured and displayed by the interrelative operations of the elements and devices described above.