The weighing vacuum feeder adopts the Siemens MMI software WINCC. The system is mainly divided into four screens: process flow screen, parameter setting, centralized control, trend curve and report. Above the clock, there are numerical displays of the total pressure of the gas path and the temperature of the cooling water. In addition, in the process flow, there are main material feeding unit, batching unit, vacuum feeding unit, mixing unit, finished material unit, pulse valve parameter setting, weighing instrument parameter setting, temperature alarm limit setting, motor current display, valve summary control, and temperature alarm curve graph.

The feeding system selects the target value of dosage according to the process formula, sets the discharge quantity of each material through the weighing controller, and stores the formula, after pressing the START key, the PLC sends out the dosage instruction, at this time, the screw feeder starts to dosage, the valve of the intermediate dosing hopper closes, the material falls into the dosing hopper, and the valve of the liquid material hopper opens, when the weight of the material reaches the target value, the weighing module group sends out a signal to the weighing When the material weight reaches the target value, the weighing module group will send a signal to the weighing instrument and PLC will issue a command to stop feeding, at this time, the screw feeder will stop working.

The dosing system is specially designed for the quantitative and proportional packaging of various materials, mixing and dosing in the process. A variety of raw materials proportioning mixed into a rated amount through the automatic proportioning function, the material begins to move when the pre-component will reach 90% of the system automatically turns to slow charging, until the material reaches the precise value of the pre-set parameters, in the process of the weight value of each material is also displayed, then the system automatically opens the discharging arc door and synchronized with the start of the conveyor system will be the material transported to the next unit or for packaging.

The Material tank mixing system mainly realizes the automatic control of the whole system through the electronic scale, which mainly completes the functions of automatic feeding, discharging, transporting, mixing and stirring of materials. It adopts the centralized control method of industrial control machine dosage, which consists of a host and several slaves connected through the network, and the host will give the control task to each slave to complete.

There are three types of automated mixing systems, namely, single tube center tube, multi-flow tube, and wall mounted. The wall mounted type is more commonly used, compared to the other two types of wall mounted granular material mixing and homogenizing silo mixing tube is closely connected to the silo wall, the central part does not need to be supported by a bracket and will not be deformed by stress, in addition to the granular material by gravity, the middle part of the fall speed is generally fast, wall mounted flow tube can greatly improve this problem. This feeding system is suitable for granular materials with good fluidity, for high mixing requirements, it is necessary to integrate the airflow type to the bottom of the silo 1/4 of the material back to the top of the material layer, so as to ensure that the quality of the entire silo product quality uniformity, and can also be connected to a number of blending silos to achieve uniformity of the entire product line.