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Haimen Yuanda Pharmaceutical Machinery Co., Ltd
Process principle of oral liquid filling machine
Date: 2025-07-15Read: 4
The process principle of oral liquid filling machine mainly includes the following core steps:
1. Bottle delivery and positioning
Oral liquid empty bottles are sent to the workstation through a bottle feeding wheel or synchronous belt conveyor system. The dial device accurately divides the bottles, making them move forward at a constant speed at a fixed distance; The inlay on the synchronous belt ensures that the bottle maintains a stable running trajectory and accurate positioning during the filling and sealing process.
2. Quantitative filling
The filling needle is inserted into the bottle mouth under the control of a tracking mechanism driven by a servo motor, and moves synchronously with the bottle to achieve dynamic filling. The liquid is quantitatively transported through a peristaltic pump or pneumatic system, and the filling needle rises with the liquid level to prevent the generation of bubbles (i.e. 'submerged needle defoaming' technology). The control system monitors the liquid volume in real-time and automatically stops filling when there are no bottles available.
3. Providing and wearing covers
After being sorted by electromagnetic oscillation, the bottle cap enters the capping track in an orderly manner. When the bottle passes through the cap mechanism, the cap is automatically hung to the bottle mouth, and then the position is corrected by the pressure cover plate to ensure that the cap is completely attached to the bottle mouth.
4. Sealing and sealing
Capping sealing: After putting on the cap, the bottle enters the capping station, and three rolling knives are synchronously pressed towards the center of the bottle cap under the control of a cam. The aluminum cap is deformed and tightened through the action of a cone sleeve, achieving mechanical sealing;
Spiral cap sealing: The pneumatic robotic arm grasps the bottle body, and the three claw rotary cap head imitates manual torque to rotate the bottle cap. The torque can be adjusted to avoid damaging the bottle cap.
The sealing system is equipped with a detection device that automatically eliminates non-conforming products.
5. Power and Coordination Control
The motor drives the core transmission shaft through the worm gear shaft of the reducer, and then synchronously distributes the power to the filling, capping, and conveying modules through the gear set. The PLC system integrates sensors and human-computer interaction interface, coordinates the timing of each process, and has functions such as fault alarm, parameter memory, and remote monitoring.
The entire process realizes fully automated closed-loop operation, seamlessly connecting from empty bottle input to filling and sealing finished product output, ensuring production efficiency and drug safety.
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