Heat shrink packaging machines are highly automated devices widely used in the pharmaceutical, food and beverage, and household chemical industries. Using shrink film packaging machines can significantly reduce the material and labor costs associated with box packaging, resulting in substantial economic benefits.

Fully automatic shrink packaging machines are automated packaging equipment that combines pneumatic components and mechanical devices, controlled by a PLC and other peripheral circuits. The actuator of this equipment is a cylinder. Its forward and backward movement is controlled by a 2-position 5-way solenoid valve. The working position of the cylinder is detected by magnetic switches and proximity switches, and the feedback is sent to the PLC. The PLC then issues control commands to the corresponding solenoid valve of the cylinder through a program, thereby controlling the cylinder's movement.