About the control problem of the injection molding machine
Modern plastic injection molding machine is a typical system integrating machine, electricity and liquid. Because of its characteristics of complex molding, less processing, and many types of plastics processed, it has developed extremely rapidly since its inception. More than 80% of the world's engineering plastic products are processed by injection molding machines. Conventional injection molding machines generally use simple open-loop control, which is controlled according to preset values. In the manufacturing process of the device, parameter values such as clamping force, cycle time, temperature, etc. are preset in advance, and are maintained by the machine during the production process. For example, the mold temperature can be maintained by controlling the temperature of the heating fluid, which can be maintained by controlling the power of the external heating device. This control method has a simple structure, but the anti-interference ability is poor, and the contro...