The metering cylinders of the filling machine are respectively connected to the filling heads, through the reciprocating movement of the main oil cylinder, suck a certain amount of liquid, and then inject it into the container to be filled. In this process, it is necessary to switch a through valve to change the flow direction of the liquid when the main cylinder changes direction in time. Moreover, during the injection process. In order to speed up the filling speed without causing the liquid to overflow, when the filling reaches 90% of the full bottle, a throttle valve connected in series in the injection path must be opened to significantly reduce the injected flow.

Then, the filled containers will be moved out sequentially, and the new empty containers will be moved sequentially. In this process, the blocking plates installed at the inlet and outlet of the container are accurately and timely controlled to ensure that only the containers are moved in and out each time. At the same time, make sure that no matter what kind of container is used, the filling head can exactly fit the bottle mouth of the container, otherwise an alarm signal will be output, and the filling will not be allowed to continue until the fault is eliminated. Finally, after the container is in place, the filling head can accurately move down so that the filling can be inserted into the mouth of the bottle. After filling, the filling head should move up quickly so that the container can be removed smoothly.