With the continuous improvement of people's living standards, the demand for all kinds of convenient food is also increasing, which further promotes the rapid development of China's food packaging industry. Vacuum packaging is one of the rapid development packaging machinery, which has a broad development prospect. There are many kinds of vacuum packaging machines. Let's introduce the external vacuum packaging machines.
1、 Definition of external vacuum packaging machine:
People often put the package on the outside of the vacuum chamber to complete the vacuum packaging equipment called external vacuum packaging machine. The external vacuum packaging machine is mainly designed for vacuum packaging of larger packages.
2、 Principle of external vacuum packaging machine:
Different from the structure of the internal vacuum packaging machine, the external vacuum packaging machine puts the air into the packaging bag of the package through the air extraction nozzle, exhausts the air, exits the air extraction nozzle, and then completes the sealing. The external vacuum packing machine generally has 1-4 suction nozzles. The power source of sealing line is generally cylinder or motor.
3、 Classification of external vacuum packaging machines:
According to the different positions of the packages, the external vacuum packing machine can be divided into horizontal external vacuum packing machine and vertical external vacuum packing machine. The packages of horizontal external vacuum packaging machine are placed horizontally; the packages of vertical external vacuum packaging machine are placed vertically. Horizontal external vacuum packaging machine is more common in the market.
4、 What to pay attention to when purchasing vacuum packaging machine:
When choosing the vacuum packaging machine, we should not simply choose the model according to the model. Generally speaking, because the food (package) produced by each user is not the same, the packaging size is not the same, the technical level requirements of vacuum packaging are different, and the requirements of working efficiency are different (the output is large and small, etc.), but according to the characteristics of the user's own products (including: liquid, solid, powder, glue Shape, semi liquid, pickled products, cooked meat, seafood, etc.), the size of the packaging bag (including the width of the bag mouth, the longitudinal length of the bag, the height (thickness) after the goods are loaded to determine which model is suitable for the user.) The main basis for users to determine the model is the sealing length, double row spacing, available height of vacuum chamber, production efficiency of the whole machine, etc.
