The operating principle of a plunger filling machine is that a pneumatic cylinder drives a piston to extract and inject material between a hopper and a metering cylinder. Quantified filling is achieved by controlling the cylinder's stroke.
Core Working Principle
Material Extraction: The cylinder drives the piston to draw material from the hopper through a three-way rotary valve into the feed pipe.
Metering and Injection: Driven by the cylinder, the piston pushes the material through the three-way rotary valve into the container, where it is filled through the filling nozzle.
Quantity Control: The filling volume is precisely controlled by adjusting the cylinder's stroke length, with an error typically within ±0.5%-1.5%.
Key Technical Features
Self-priming Design: No additional pumping equipment is required; the cylinder drives both extraction and injection.
Precise Quantity: A mechanical mechanism controls the stroke length to ensure a consistent filling volume each time.
Applications: Suitable for viscous materials such as liquids and pastes, such as ketchup, chili sauce, and toothpaste.