Advanced Automated Filling Technology Boosts PET Bottled Water Production

Integrated design and process flow

The integrated unit brings three functions into a single machine frame: bottle rinsing, gravity filling and cap tightening. Bottles enter through an air conveyor and are transferred by a starwheel to each processing station in sequence. This arrangement reduces transfer points and supports a continuous production flow.

Construction materials are selected for corrosion resistance and hygiene. The main body uses SUS304 stainless steel, while components in direct contact with water, including the filling valves, use SUS316L stainless steel.

Key technical systems

Rinsing: hygiene and water efficiency

The rinsing unit uses SUS304 stainless steel and high-performance flip-type bottle clamps. The clamps grip bottles at the neck, avoiding the hygiene concerns associated with conventional rubber components. High-precision nozzles direct water at multiple angles inside the bottle, aiming to achieve thorough cleaning while optimizing water use.

Gravity filling: precision control

The filling section operates on the gravity principle. A float valve controls the liquid level, and the system is designed to keep filling accuracy within ±2 mm. Cam mechanisms drive the automatic lifting and lowering of the filling valves, a design intended to meet high-speed production requirements.

Magnetic constant-torque capping

The capping unit uses magnetic constant-torque capping heads to maintain stable and reliable tightening force, with capping error held to 0.2 percent or less. An anti-reverse-cap device and photoelectric switch detect missing caps and automatically adjust the process, helping prevent uncapped bottles from entering downstream stages.