What is Liquid Filling Packaging Machine ?

Working Principle

• Liquid Conveyance: Liquid is transported from the storage tank to the filling valve through pumping, gravity, or air pressure.
• Container Positioning: The container is accurately positioned below the filling port by a cylinder or servo motor system.
• Automatic Measuring and Filling: According to the filling method (such as time - controlled, flow - meter - based, or weighing - based), the valve is controlled to open and fill according to the set parameters.
• Automatic Stop and Anti - Dripping: After filling is completed, the valve closes automatically, and an anti - dripping design prevents liquid residue.

Main Classification

• By Filling Principle:
  • Atmospheric Pressure Filling Machine: Fills by the gravity of the liquid under atmospheric pressure, suitable for low - viscosity, gas - free liquids such as milk.
  • Pressure Filling Machine: Fills under pressure higher than atmospheric pressure, including equal - pressure filling and pressure - differential filling, suitable for gas - containing liquids such as beer.
  • Vacuum Filling Machine: Fills under pressure lower than atmospheric pressure, with a simple structure and a wide range of viscosity adaptability, suitable for oils and syrups.
• By Operation Type: It can be divided into fully automatic liquid filling machines and semi - automatic liquid filling machines. The former has a high degree of automation and can complete a series of processes such as container conveying, filling, and capping; the latter requires manual assistance for some operations.
• By Filling Material: It can be divided into conventional liquid filling machines for low - viscosity liquids such as water, viscous liquid filling machines for high - viscosity liquids such as honey, corrosive liquid filling machines for chemicals such as disinfectants, and sterile liquid filling machines for pharmaceuticals and other high - hygiene - requirement fields.

Structural Composition

• It usually includes a liquid delivery system, a filling control system, a metering device, a container positioning system, and an intelligent operation platform. Some advanced filling machines are also equipped with functions such as capping, labeling, and coding.

Advantages

• High - efficiency Production: The automatic filling cycle is fast, which can greatly reduce manual operation time and is suitable for large - batch continuous production.
• Accurate Dosing: Equipped with a high - precision metering device, the filling error can be controlled within ±0.5%.
• Strong Compatibility: It supports a variety of bottle shapes, capacities, and material containers, and the specification switching operation is convenient.
• Simple Operation: Adopting a PLC + touch - screen operation interface, parameter adjustment is intuitive, and employees can easily learn and get started.

Application Fields

• In the food and beverage industry, it is used for filling mineral water, juice, oil, etc.; in the daily chemical industry, it is used for filling laundry liquid, shower gel, etc.; in the pharmaceutical industry, it is used for filling oral liquids, syrups, etc.; in the chemical industry, it is used for filling lubricating oil, paint, etc.

Equipment Examples

• 双头全自动活塞式液体灌装机: As shown in the following figure, it has two synchronous filling heads, which can quickly and accurately fill high - viscosity fluids. The parts in contact with materials are made of 316L stainless steel, and it has functions such as anti - dripping and counting.