.Automatic mixing system through the programmable controller touch screen automatic control program, can automatically mix a variety of raw materials in different order and temperature, to achieve the ideal product manufacturing automatic mixing equipment. The main tasks are initial data input, material tracking, process parameter setting calculation, data recording and report, human-machine dialogue processing, data communication, analog resin model, historical data processing, application system startup, event monitoring, etc. The process control automation level computer system reserves the communication interface with the continuous casting and computer system.

The control system of the feeding system consists mainly of a PLC, a touch screen, actuators and detection elements. The computer downloads the program and monitors the operation of the equipment through the Ethernet PLC on-line. It communicates with PLC through Modbus 485 communication protocol to display the running status of the equipment and set the running parameters for starting and stopping the equipment. The actuator is responsible for executing the instructions from PLC and performing the corresponding actions. The detection element sends the status and parameters of the equipment to the PLC.

Metering feeding equipment collection storage body, conveying body, weighing dosing body, dust removal body, material mix and other equipment, dosing according to the characteristics of the industry, reasonable selection of "zero method" or "reduction method" weighing methods, according to the actual need to adjust the spiral speed, so as to achieve normal dosing. After measuring by electronic balance, it enters the feed tank of spiral pneumatic conveying, and pushes forward into the mixing tank through the spiral mechanism.

The new error-proofing mechanism and weighing system adopted in the feeding equipment greatly improves the product quality and efficiency of the production batching. The whole process control system makes the whole production process control, production plan management, material management, quality tracking management in one, and really realizes the control in one, which plays an important role in enhancing the management level, improving the product quality and maintaining the product stability, and it is more convenient for the customers to remotely monitor the inventory of the production factory and the production equipment and other related information across the regions, provinces and countries.

The automatic feeding equipment realizes the collection, calculation and adjustment of all signals, respectively: temperature control, traction control, pressure control and auxiliary control of the local unit. It mainly installs WinAC adapters, as well as unit status monitoring, process data access, unit dosage control, and connects with the process control server and production planning server at the workshop level, so as to seamlessly connect with the MIS dosage at the factory level, and can read and write raw materials and production statistics by using SQL query statements, and can print and print the page settings. Read and write relevant data in the database using SQL query statements.

Weighing and loading equipment adopts single-loop PID control, the control parameters include: proportionality P, integral time I, differential time D, control period Ts. In addition to this, it also adopts serial loop. That is, when the output of one controller is required to change the given value of another controller, the two controllers thus connected are said to be in series. Both controllers have their own measuring inputs, but only the main controller has its own independent given value, and the output signals of the secondary controller are sent to the controlled process. The speed of the feed pump, the internal temperature regulation of the reactor and the tandem control of the viscosity and vacuum are controlled by means of a weighing module.

Automatic feeding equipment realizes the functions of dosage process control, logic control, sequence control, etc.; the numbers are mainly pressure, temperature, flow, liquid level, and it consists of one on-site control station and one operation station (also used as engineer station). Mainly responsible for the network and management, in a module on the processor both independent of each other, but also associated with each other (through the DPR), so that the resources of the main CPU has been reasonably used, while maximizing the speed of the entire dosage. Hardware is used up to 100K ~ 16M application memory (general PLC are only a few dozen K), so that it can run larger software.

Measuring and batching equipment from the classic PID regulation, feedback, feed-forward loop control gradually developed to batch control, centralized control, object-oriented optimization control, artificial intelligence control gradually developed to multi-parameter multi-objective control, its correction, compensation, algorithms more and more to do a lot of detailed and accurate, and is particularly important.

Mixing equipment consists of touch screen and bus module. Among them, the touch screen mainly completes the setting of process parameters, the system's motor rate, etc.; displays the gravity of each tank and the historical parameters, and displays the system's operating status. Including inverter current, fault code, etc. RS232 port to establish point to point communication. The main function is to complete the scanning of the module to get the gravity signal on site. And according to the requirements of the process parameters for a variety of PID operation after the output control signal to the bus output function.