When the machine is used continuously for more than three months, the temperature resistant wires in the contraction chamber should be inspected and replaced according to their aging degree. During machine operation, the operator's palm and other parts are not allowed to come into contact with the operating parts of the machine, especially the extremely high temperature inside the contraction chamber, which can easily cause burns. After the packaging work is completed, the heating switch should be turned off first, and the conveyor motor and fan motor should continue to run for about 10 minutes before cutting off the entire power supply.

The shrink packaging machine and the winding machine both consume a large amount of power, so the input power must be greater than the nominal power on the shrink machine nameplate, otherwise it is easy to burn out the circuit or electrical components.

There are two ways to wrap items with flat film: single flat film and double flat film. The film should be wider than the object, using a double flat film, that is, wrapping it with two films on top and bottom. While the previous packaging is completed with sealing and cutting, the two films are sealed together. Then, the product is pushed into an upright film by machine or hand, and the sealing and cutting mechanism falls in place. The other side of the product is sealed and cut off. The product wrapped in the film shrinks after heat shrinkage, and the two ends of the packaging shrink to form an elliptical opening. When using a single flat film, First, unfold the flat film and feed the wrapped product towards the middle of the film to form a horseshoe shaped wrap, then heat seal and overlap the seal.

The fully automatic shrink packaging machine is an automatic packaging equipment that combines pneumatic components and mechanical devices, controlled by PLC and other peripheral circuits. The executive component of the device is the cylinder, which is controlled by a two position five way solenoid valve to move forward and backward. The working position of the cylinder is detected by magnetic switches and proximity switches and fed back to the PLC. The PLC sends control commands to the corresponding solenoid valve of the cylinder through a program, thereby controlling the action of the cylinder.