Liquid filling machine is a highly automated packaging equipment, its main function is to liquid materials into a predetermined set of weight. In the filling process can effectively avoid the material overflow, to prevent the maximum extent of the material itself on the environmental pollution, so as to effectively protect the operator labor. The system is stable and reliable, easy to operate and accurate in filling. It mainly consists of filling gun device, PLC system control part, weighing system, filling rack table, conveying equipment and so on.

The methanol filling machine reads the data stored in the chip through the interface of the weighing module, processes the data of the weighing module through the serial port, and is responsible for receiving the polling signal sent by the server to the base station to give the response information. If the communication frame is the data frame sent by the server to the base station, the data sent by the weighing module is directly sent to the serial port sending buffer. The received data is checked and simply analyzed and sent to the serial port receiving area to ensure the stability of the signal.

Automatic filling machine has human-computer interaction, communication, display and storage, printing and other functions, which can realize real-time process data monitoring, set up alarms for running process events and switch between manual and automatic control. The computer downloads the program and monitors the operation of the equipment through Ethernet PLC on-line. The computer 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 commands from the PLC and performing the corresponding actions.

The main electrical control part of the filling machine is a Siemens S7300 series PLCCPU317-2PN/DP. The filling valve control part is a control system module EX484. Siemens PLC is responsible for the safety functions, speed control, high level buffer tank level control, return cycle heating, CIP in-situ cleaning, height adjustment, signal exchange, etc. The control system is composed of Siemens PLC buses. Siemens PLC control system consists of two buses, Profibus and ASI bus. The filling machine is responsible for filling valve metering cylinder level control, tank filling level control, filling valve pneumatic control, filling angle time control and so on. The filling valve control is composed of two buses: Powerlink bus and CANbus bus.

The paint filling machine takes images of the inspected barrels on the weighing platform of the inspection weighing module in real time and transmits them to the image acquisition card. After digital decoding, A/D conversion and other processing, it is transmitted to the computer memory via PCI bus for storage. Adopting automatic weighing, PLC control, electromechanical, computer interface and other automation technologies, we have developed and completed the intelligent filling weighing and inventory management system independently.

The filling machine calculates the position information of the circular filling port in the image of the barrel cover surface, namely the filling port radius, the filling port center mark and the height of the oil gun. The corresponding position information is transmitted to the stepper motor control system, and the motor control system drives the shaft stepper motor according to the pulse instruction issued by the computer, and drives the oil gun to run above the filling port to realize automatic positioning and filling.

The filling machine meets the non-foam filling and liquid filling with foam, through the combination of weighing module, weighing instrument and filling system. It achieves the metering work of weighing and dispensing of the filling barrels, and thus the system of control. It can be directly connected to PLC system and terminal control system to realize multi-range control and automation control. The filling system digitizes the weak weight signal output from the weighing module to obtain high precision weighing data. Rich digital filtering technology is set up in the software, as well as emergency software to prevent interference with the system out of control, and so on.

Propanol filling machine is driven by stepping motor to drop down to reach the lower limit position, the well is signaled by the travel switch, and the PLC controls the filling valve to open fully for filling. The use of local area network realizes the communication between the field computer and the equipment, through the RS485 network can communicate with the filling machine each other. The use of multiple filling machines can easily constitute a RS485 distributed control system network.

The automatic filling machine is used for uniform discharging of liquid filling, so as to ensure the control precision of filling. With warehouse management function, intelligent report software provides a lot of data information for production management, filling result list, raw material consumption list, production quantity list, filling use result record, etc.. Statistics and printing functions such as production shift report, daily report, monthly report, annual report, etc. can be made according to time, filling, etc. It can interact data with other weighing systems to meet the requirements of deep data analysis.