The loading system can be set up before each production to enter the recipe for the current batch and proportionally distribute the required quantity of raw materials (or it can be used in a default way, i.e., the recipe from the previous batch is still used). This provides the data basis for automatic feeding. Automatic hopper system in the production start at the same time, the PLC will be dynamic metering start signal sent to the weighing and measuring instrument, the instrument that is to start the weight of each link to collect, display, and in different weight stage using fast feeding and slow feeding strategy, in order to take into account the improvement of efficiency and accuracy of measurement. When it reaches the target value, it will output the stop measuring signal and close the related valves and pumps by PLC control. At the same time to complete the unloading to the reaction kettle action, metering instrumentation automatically zero tare.

At the end of this dosage, the reaction kettle by the upper computer (computer) on the actual data to do storage, reaction kettle and can be required to do a certain degree of precision analysis, to generate all kinds of reports, for production statistics, management. The reaction kettle can print all kinds of reports online or offline according to the user's demand, such as daily output of finished products, consumption of raw materials, inventory of raw materials, inventory of finished products, etc. The reaction kettle weighing adopts the dynamic Weighing system. Reaction kettle weighing adopts dynamic measurement accuracy control method. The automatic dosage process is initiated when the external run input signal is valid in the stop or pause state. By pressing the start button, the system instrumentation is started and the Electronic scale weighing instrumentation is zeroed. Then give the raw material fast feeding and slow feeding valid signal, the system opens the valve to start the material pump, start the fast feeding process (i.e. open two feed valves at the same time), at the same time, the instrument starts to track and read the signal of the weighing module at any time, when the weight is close to reach the preset value of the big cast, the instrument will close the fast feeding signal, so that the system enters into the slow feeding process (close a valve), at the same time, the electronic scale instrument continues to track and read the signal of the weighing module at any time. Weighing module signals, the instrument will determine whether the hopper weight is greater than or equal to the target value of the drop value. If it is greater than or equal to, then the instrument closes the small drop signal, stops the dosing process (all valves and feeding motor closed), the end of this measurement. If you need to cumulatively add the amount of measurement in the same measurement kettle to start the second material charging, at this time the instrument is first cleared to zero display output, fast feeding and slow feeding is effective, the process is the same as above. Otherwise start unloading to the reactor.

After completing the dosing process of all materials in turn, the meter will display the weight of the four materials in the hopper respectively, the meter outputs the unloading signal, the system starts to unload the materials, when the weight in the hopper is equal to or less than the set range of the zero area, the meter closes the unloading signal, and at the same time, returns to the stopping state (the running output is invalid, and the pause output is invalid). Completion of a dosage process. The initial value of the material fallout is set according to experience, and then the fallout value in the process of measurement adopts the self-learning way according to the actual measurement value, approaching the target value step by step, so that the error becomes smaller and smaller.