Heat shrink packaging machine is a highly automated equipment, widely used in medicine, food and beverage, household items and other industries. The application of shrink film packaging machine can greatly reduce the material and labor cost of middle box packaging, which has important economic significance.

Automatic shrink packaging machine is an automatic packaging equipment which combines pneumatic components with mechanical devices and is controlled by peripheral circuits such as PLC. The executive element of the equipment is the air cylinder. It is controlled by a two-position five-way solenoid valve to move forward and backward. The working position of the cylinder is detected by the magnetic switch and proximity switch and fed back to PLC, and PLC sends control commands to the solenoid valves of the corresponding cylinders through programs, thus controlling the actions of the cylinders.