The liquid Filling machine adopts fully automatic barrel handling and extraction equipment. From the stage of barrel extraction, it is fully automated. All that needs to be done is to neatly place barrels of the same specifications and models at the designated positions. The conveyor will accurately extract one packaging barrel each time and precisely transport it to the filling nozzle through the power track. The filling head's discharge device uses an Electronic scale configuration and an electrical and control system with PLC as the core. The electronic scale is the detection element, the variable frequency control is the execution element, the human-machine interface is the monitoring means. Through the electronic scale, all the analog and digital quantities required by the Filling system are collected. Anti-dripping and anti-leakage technologies are adopted, and various operation processes are interlocked controlled. A separate cylinder-controlled residual liquid collection tank is installed below the filling head, combined with the adjustable speed filling function. The conveyor belt starts, the barrel moves forward, and the bottle detection photoelectric counting (8 barrels) is in place. The front bottle-blocking cylinder acts to stop the subsequent barrels, and the card bottle cylinder acts to hold the barrel mouth (for large-bore barrels, this function will be closed). The filling head descends to fill, and the filling head moves upward, the leakage-receiving cylinder extends to receive the leakage, and the rear bottle-blocking cylinder acts. The barrel moves forward, completing one filling process.

In the liquid filling system of the automatic filling machine, a piston-type metering filling gun is used. The driving module is controlled by an air cylinder to drive a ball screw, and the distribution module uses a cone valve one-way valve. The liquid level tracking module is realized by controlling the ball screw. The automatic control uses widely applied PLC as the control center. The electronic scale uses the automatic weighing method. To improve the operability of the control equipment, the human-machine interface can conveniently select and call filling parameters, and intuitively obtain the filling results. The cylinder control generates driving force in the filling process, and the ball screw drives the piston rod to move up and down. The slider connects between the screw and the piston rod to ensure the smoothness of the slider movement. On the left side of the slider, a linear guide rail is installed. Under the control of the cylinder, the piston rod of the piston-type filling gun moves up and down reciprocally. The filling gun is cylindrical, and the distance of the piston rod movement corresponds to the weight of the filling. A one-way valve is selected as the distribution mechanism. During filling, the one-way valve at the outlet opens to complete the filling process. The filling gun is connected to the distribution structure through a steel wire hose, and the filling container is placed on the electronic scale tray. The electronic scale tracks and controls the step-by-step control and ball screw to ensure the constant distance between the gun and the container liquid surface, reducing splashing and foaming during the filling process. On the human-machine interface, by changing the filling parameters such as filling volume and filling speed, PLC can send corresponding control signals to the cylinder control and step-by-step control, achieving different filling parameter control.

The components of the automatic filling machine mainly include electronic scales, PLC, conveyor, filling machinery, touch screen, and up-and-down sliding filling guns, etc. During the operation of the PLC system, it can read the relevant information of the material weight and also perform a series of operations such as recovery and weighing of the material by the up-and-down sliding filling gun according to the program. When the filling starts, the piston of the up-and-down sliding filling gun occasionally has a slight dripping situation. The dripping can be controlled by the residual liquid collection tank for recycling. When the material gets closer to the target value, the dripping amplitude of the up-and-down sliding filling gun in actual operation can be reduced to some extent, effectively achieving precise recycling operations. When the material reaches the weight value set by the program, the filling process will stop. During the operation of the automatic filling material supply control system, rapid or precise recycling can be achieved by adjusting the dripping amplitude of the cylinder control and step-by-step control. At the same time, during the weighing process of the material, the touch screen can display the actual weight of the material in real time, and the accuracy of the material weighing can be controlled within the error range.