The automatic feeding system mainly completes the data state acquisition and output control of the relevant analog and switching quantities of the on-site equipment. The touch screen is used in conjunction with the metering tank PLC, which makes the application of the tank PLC more flexible. The touch screen can set parameters, display data and depict the production process in the form of animation, which makes the application of PLC visualized. The weighing system uses RS232 interface to connect the touch screen to the PLC via communication cable. The remote touch screen (HMIA) and the local touch screen (HMIB) are connected via Ethernet, both of them can display the instrument data and equipment status, and both of them can control the field equipment.

The weighing and feeding system is usually used for batch mixing of two or more raw materials in proportion to each other, and programmed to make the batch mixing continuous, so as to achieve uniformity in the mixing ratio. The human-machine interface is used to input the corresponding proportioning parameters, the signal of each weighing scale is transmitted to the weighing instrument through the load cell, and then the signal is converted by the weighing instrument and connected to the central controller, which, combined with the set formula and according to the real-time data of each weighing unit, controls the charging time and the amount of each kind of material, when all the raw materials are weighed and finished, they all enter into the reactor, and then, after sufficient mixing, enter into the dosing kettle by means of screw or gravity. After sufficient mixing, they will enter into the dosage tank by screw or gravity.

The weighing and feeding system adopts the screw metering method, and adjusts the material flow by controlling the screw speed through frequency conversion. When the system enters into working condition, the material from the spiral is conveyed and passed through the load cell for weight detection, and the speed sensor installed at the end for speed detection, the detected weight signal and speed signal are sent to the weighing instrument together, and the weight of the material in the spiral is detected and inputted into the totalizer with the help of the weighing module, and the frequency converter detects the speed of the motor, and inputs the speed information into the totalizer. The totalizer will process the received spiral speed signal and weight signal to get the cumulative amount of material and the time flow.

The feeding system is suitable for conveying, measuring and batching, with weighing and batching trolley, screw and belt as the material conveying tools, and at the same time, it is a complete set of automation equipment for dynamic weighing and batching control. According to the user's specific production process requirements, through the man-machine group configuration monitoring system and PLC program to load to the weighing and batching trolley material weight, flow control, so as to achieve accurate measurement and batching. As a dynamic continuous measuring and batching automatic control device, it can also provide accurate measuring data and control means for production control and management of various industrial sites.

The automatic feeding system has very powerful functions to deal with the packaging process, set the target weight of any package, remove the tare automatically, correct the error automatically, and control the feeding actuator with multi-speed output and have the function of prohibiting the sampling time setting to eliminate the influence of the hopper vibration and rushing material on the metering accuracy, and the function of alarming for exceeding the difference in output, etc. It is equipped with a variety of communication interfaces to communicate with the upper computer, and is equipped with the corresponding operation software. It can be conveniently connected to the central control system of complete sets of production lines. Through the frequency conversion (service) control technology, running in the rigorous logic program of the programmable logic controller (PLC), so that the operation process becomes intelligent, reliable and stable; so that the manual operation becomes very simple.

The mixing system consists of four storage bins with electronic scales, each with a vibration motor, four bins and a cylindrical storage tank and a midway bin, the feeding system is carried out by a screw conveyor.