In daily life, the application of liquid packaging machines can be seen everywhere. Many packaged liquids, such as chili oil, edible oil, juice, etc., are very convenient for us to use. Today, with the rapid development of automation technology, most of these liquid packaging methods use automatic packaging technology. Let’s talk about the classification of liquid packaging machines and their working principles.

Liquid filling machine

According to the filling principle, it can be divided into normal pressure filling machine and pressure filling machine.

The normal pressure filling machine fills liquid by its own weight under atmospheric pressure. This type of filling machine is divided into two types: timed filling and constant volume filling. It is only suitable for filling low-viscosity gas-free liquids such as milk, wine, etc. ​

Pressure packaging machines perform filling at higher than atmospheric pressure, and can also be divided into two types: one is that the pressure in the liquid storage cylinder is equal to the pressure in the bottle, and the liquid flows into the bottle by its own weight for filling, which is called Isobaric filling; the other is that the pressure in the liquid storage tank is higher than the pressure in the bottle, and the liquid flows into the bottle due to the pressure difference. This method is often used in high-speed production lines. The pressure filling machine is suitable for filling liquids containing gas, such as beer, soda, champagne, etc. ​

Due to the rich variety of liquid products, there are many types and forms of liquid product packaging machines. Among them, packaging machines for liquid food packaging have higher technical requirements. Sterility and hygiene are the basic requirements for liquid food packaging machines.