Design and Simulation of Plasma Spraying Velocity Control System for Conical Screw Thread of Injection Molding Machine

The plasma spraying speed control system for the conical screw thread of injection molding machine was designed and simulated in order to improve the movement precision of the welding torch. According to the regularity of thread formation, the master-slave synchronous control system of double motor speed was designed, which completed the accurate movement of welding torch. The combination of Smith predictive compensation and single neuron PID control was adopted in the paper because of the relatively large hysteresis of master-slave synchronous control of dual motor speed. The algorithm used to adjust the parameters of the control system. The simulation has been carried out by the computer, and the result shows that it has better control effect.