The automatic material dispensing and Filling machine uses the working principle of an Electronic scale to control the filling volume. The materials flow into (or are supplied by a pump and conveyed through) the waiting filling tanks by themselves. The fast and slow filling is achieved through dual pipelines, and the filling flow can be adjusted. At the beginning of filling, both pipelines are opened simultaneously. When the filling reaches the preset quantity, the coarse pipeline is closed, and the fine pipeline continues to fill slowly until the set overall filling volume is reached. After the filling cylinder is filled, the pneumatic piston valve in the Weighing system fills the cylinder, and the weighing module simultaneously detects the target value for filling in the Filling system and quickly transmits this information to the terminal computer. The filling module is mainly composed of the main control board, A/D conversion, human-machine interface, filling valve, pneumatic ball valve, and photoelectric isolation transmission, etc. The main control board circuit is mainly responsible for controlling and computing the signals of the weighing system, and the signal acquisition circuit is mainly responsible for generating the corresponding instructions for filling, completing the acquisition of the target value during filling, and transmitting the pressure value in the form of a signal to the next A/D conversion circuit, which is mainly responsible for converting the signal from the upper level to a signal that can be effectively processed by the computer. The human-machine interface circuit is mainly responsible for parameter setting and monitoring the operation status of the control system. The photoelectric isolation circuit is mainly responsible for signal isolation and transmission, and eliminating the mutual interference between the execution mechanism and the hardware circuit of the system. The output signal amplification circuit is mainly responsible for appropriately amplifying the output signal of the system to facilitate the execution mechanism to perform the next operation.

The weighing and filling machine realizes the automatic control and management of the liquid filling system. It adopts an electrical control system composed of a computer, PLC control system, weighing module, and solenoid valves, and completes the software design of the system. Through the computer software, the record of the filling cylinder is managed, and the PLC communication provides filling information and parameters to the PLC control system. The PLC controls the weighing module to sample and program control the solenoid valve to achieve filling. During the filling process, the operator inputs filling information (including the filling target volume, filling material number, weight of the filling cylinder, liquid concentration, etc.) and system parameters from the touch screen to form an information queue, which is transmitted to the PLC through the communication block. After the PLC starts initialization, it waits for the touch screen command. Reading one piece of information from the queue, the filling control material cylinder is initiated, the rotor pump, circular pipeline, and the required filling material pipeline are controlled to supply to the control material cylinder, and the weighing module weighs and detects, then opens the corresponding valve, and transmits the signal through the frequency converter and buffer device into the control material cylinder. The electronic scale detects the weight of the control material cylinder and, when it reaches the specified value, closes the piston valve, and repeats the above process.

The Liquid filling machine is a process of material supply, weighing, and discharge control according to the pre-designed filling volume requirements. Through equipment such as material buckets, electronic scales, filling mechanisms, etc., the supply, weighing, and discharge control of the materials are realized. A PLC controller is used to complete the automatic control of the entire production process of raw materials filling, such as filling, loading, distribution, and discharging. The filling of raw materials adopts static weighing, and the weighing module directly sends the weighing signal to the weighing instrument control system. The PLC reads the weighing value from the weighing module and controls the frequency converter. During the filling process, the material is first quickly sent to the electronic scale-controlled material bucket by the rotor pump, when the delivery volume reaches 90% of the set value, it changes to slow delivery, and stops when the set value is reached. After the filling process is completed, the system calculates the filling error and corrects the set value, preparing for the next filling.

The automatic filling machine consists of a feeding cylinder mechanism, valve piston mechanism, filling system and material pipelines, electrical control system, touch screen control system, etc. The feeding structure is for various materials placed in the material bucket, and the system includes multiple material buckets. The material bucket is equipped with a solenoid valve, and by opening the solenoid valve under the material bucket, the electronic scale controls the frequency converter to transmit through the pipeline and slowly descend into the control material bucket. The cylinder structure is equipped with a lifting motor and a weighing module in the control bucket, and the sensor signals will be input into the analog input module of the PLC. The filling system mainly consists of the bucket, a relay control ring-shaped distribution system. Inside the bucket, there is an electronic scale. In each bucket, a filling piston valve is installed in the material pipeline, and the solenoid valve controls whether to supply material to the filling piston valve. The electrical control part uses the widely used PLC in industry as the control core, and is composed of a main control cabinet and two slave control cabinets, combined with corresponding software, weighing module and corresponding executive components to automatically control the entire filling operation process; The touch screen control part mainly provides a human-computer interaction interface on the server and realizes the communication between the touch screen and the PLC.