| 摘要 |
PURPOSE:To accelerate the detection of abnormality in the position of a screw by a method wherein the variation is detected by comparing the read-into data of screw positions during the plasticization stage of resin in injection molding with the screw position data, which have been calculated in advance and stored in a memory. CONSTITUTION:The travelling speed of the screw of an injection molding machine has been calculated in advance and stored in a memory 14. When the abnormality develops in the variation of values detected by a screw position detector 13, a CPU15 displays the abnormality information in an abnormality indicator 17 in term of item code number and in a stroke indicator 18 in term of detected state and at the same time said detected state is sent through an interface 16 to a control device 12. Upon receipt of the information on said detected state, the control device 12 stops motor 6 and lights an alarm lamp 11. Consequently, the abnormality can be quickly detected by the screw position detector, resulting in enabling to prevent the damages such as the production of defective articles, failure of machine and the like from occurring. |
