72. Why does the filling volume become inconsistent when using a filling machine? How to avoid Inconsistent fills?
A. The main cause of inconsistent filling volume is the air in the filling tube.
Before starting the filling production, " saturation" must be done. The so-called "saturation" is to use continuous filling until the filling tube is completely filled with liquid to ensure a stable filling volume. The operation of continuous filling varies according to the model of the filling machine, please confirm the liquid filling machine model, and then follow the operation below.
Fig 1. Filling nozzle
If air bubbles still appear in the filling tube occasionally after tube saturation. This may be due to the pump or filling tube not being tightened, causing air to get in through the gaps between the parts. This often happens after the filling machine has been used and the parts are removed for cleaning and reassembled in the wrong way.
Please check the filling lines in the following order:
- Make sure the knob on the pump cover is firmly tightened.
- Make sure the tube clamp of infeed tube and outfeed tube is firmly tightened.
- Make sure the connection between the pump and the filling tube is correctly assembled.
Fig 2. Filling Pipe
B. The broken of filling tubes, inner oil seals, O-rings, and other consumables may also cause the poor air tightness of the filling line.
Please make sure to replace the consumables regularly.
- Check if the infeed and outfeed tubes are broken.
- Check if the pump, oil seals, and O-rings are broken.
Fig 3. Check valve
The solution of three different types of liquid filling machines:
FG-Series Gear Pump Liquid Filling Machine | FP-Series-Piston Filling Machine | FL-Series-Overflow Liquid Filling Machine | |||
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Problems | Cause And Solutions | Problems | Cause And Solutions | Problems | Cause And Solutions |
Inconsistent filling volume | 1. Check there is enough material in the hopper and the inlet tube completely submerges in the liquid. 2. Do tube saturation, make sure there is no air can be seen in the filling tube. | Unable to finish the tube saturation. | 1. Check the filling valve is correctly assembled, not upside down. 2. Check the air hose of the filling valve is correctly assembled, not in reverse. | Filling volume not even, sometimes more and sometimes less. | The overflow liquid filling machine is different from the volumetric filling machine. When the liquid level in the bottle exceeds a certain height, it will flow back to reach the equal liquid level. If the liquid level is uneven, please check follow: 1. Extend filling time.2. Make sure the nozzle tightly presses on the bottle mouth. 3. Check there is enough material in the hopper. 4. Check if any object blocks the inlet tube. |
Air bottle in the tube | 1.Check the knobs of the pump cover are firmly tightened. | Inconsistent filling volume/ Air bottle in the tube | 1. Check there is enough material in the hopper and the inlet tube completely submerges in the liquid. 2. The infeed and filling speed of the thick liquid must be slowed to avoid pumping in air. 3. When refill material into the hopper, the action should be gentle to avoid mixing air into the liquid. 4. Check the tube clamps of infeed and outfeed tube are firmly tightened. 5. Check the gaskets and O-rings are correctly assembled in the undercut, and the form is intact without damage | Dripping of filling nozzle. | 1. Check the gaskets and O-rings in the nozzle are correctly assembled in the undercut, and the form is intact without damage. |
Unstable filling rate | 1. Check if any object blocks the inlet tube. 2. Check if the machine is properly installed. | Abnormal noise when filling. | 1. Check if there is any object blocking the filling cylinder. | ||
