Development of Control System for High Vacuum Die-casting Machine Based on PLC

A type of effective high vacuum shut-off valve was developed,a set of vacuum PLC control system applied to die-casting machine was designed,which achieved well matching with the existing die-casting machine.It can detect the sealing performance of mold and the "blocked" state of vacuum pumping loop,so as to ensure the stability of vacuum die-casting process.The vacuum control system has been applied to vacuum die-cast manufacturing of automobile parts successfully,the products have well quality.