Shrink packaging machine principle

- Jul 26, 2019-

A shrink packaging machine is a machine that wraps a product with a heat-shrinkable film and then heats it to shrink the film and wrap the product. According to the type of machine, it is divided into drying tunnel shrinking machine, oven shrinking machine, frame shrinking machine and gun shrinking machine.


The automatic shrink packaging machine is a combination of pneumatic components and mechanical devices, and automatic packaging equipment controlled by PLC and other peripheral circuits. The actuator of the device is a cylinder, which is controlled by the two-position five-way solenoid valve to advance and retreat. The working position of the cylinder is detected by the magnetic switch and the proximity switch and fed back to the PLC. The PLC sends a control command to the solenoid valve of the corresponding cylinder through the program. To control the movement of the cylinder.


During the shrinking process, the quality of the package is not affected, and the shrinking is fast and perfect. The packaged product can be sealed, moisture-proof, and impact-proof, and is suitable for tight packaging of multiple articles and tray packaging.

1 Direct heating with far infrared rays;

2 The device is small in size, short in warm-up time and power-saving;

3 electronic stepless speed regulation;

4 shrinkage does not affect the quality of the packaged items and can shrink the package perfectly;

5 Suitable for packaging of regular or irregular items


The configuration of the shrink packaging machine mainly lies in the heat insulation tube and the heat insulation effect of the whole machine. These are the key factors that directly affect the shrinkage effect and the service life of the whole machine. Its main heat pipe is divided into:

1. Quartz tube: It is directly heated by far-infrared radiation, electronic stepless speed change, solid-state voltage regulator for temperature control, stable and reliable;

2. Stainless steel heating tube: high-quality stainless steel heating tube, internal two-way thermal circulation wind, uniform heat and constant. The electronic speed governor can be used to adjust the conveying speed arbitrarily to ensure the smoothness of the conveying and the good shrinking effect;

The product after packaging can be sealed, moisture-proof and anti-collision. It is suitable for wrapping and tray packaging of multiple items; digital display computer can control temperature by itself, with small temperature difference; stable and reliable, low noise and long service life;

Quartz tube is used in the initial development of shrinking machine, mainly based on stainless steel heating. According to the use of customers, stainless steel heating tube is 8-10 times longer than quartz tube.

Scope of application:

Glass bottles, styrofoam, cartons, toys, electronics, electrical appliances, stationery, books, records, hardware tools, daily necessities, pharmaceuticals, cosmetics, beverages, fruits, commemorative labels and other items.


According to the film, it can be divided into p film shrinking machine and pof film shrinking machine;

According to the heating method, it can be divided into quartz tube heating and stainless steel heating;

According to the speed regulation, it can be divided into electronic speed regulation and frequency conversion speed regulation.