What is the working principle of the stretch film machine?

Stretch Film Machine (or packaging machine) is a mechanical equipment used to package goods. Its working principle is to form a protective packaging layer by wrapping film material around the goods.

How it works can be boiled down to the following steps:
Stripping: First, a piece of film is removed from a roll of film material. This film roll is usually located at the top of the machine and feeds the film material through a roller called a stripper roller.
Moving conveying: After the film passes through the top roller, it is moved to the goods that need to be packaged through the conveying system.
Fixing the goods: When the film moves to the side of the goods, the goods need to be placed on a platform and fixed in a certain position through a clamp or clamping device to ensure the stability of the goods during the packaging process.
Stretch film roller rotation: When the goods are fixed, the film roller starts to rotate, wrapping the film around the goods. The rotation speed can be adjusted via the control system.

Film tension adjustment: The film tension adjustment device can adjust the tension between the film roller and the goods to maintain the appropriate tension of the film material. In order to ensure that the film can closely adhere to the surface of the cargo without loosening,
Winding mode adjustment: Stretch film machines usually have different winding modes to choose from, including horizontal winding, spiral winding and staggered winding, etc., to adapt to goods of different shapes and sizes.
Cutting and fixing the film tail: After the film is wound into a certain number of turns, the cutting knife will cut the film, and the heat shrink gun will heat the film tail to make it shrink and tightly fixed on the goods.

End of packaging: When the goods are completely packaged, the Stretch film machine stops working and the goods can be removed from the platform for further processing or transportation.

Some common types of stretch film machines: Hand grade stretch film machine, semi-automatic stretch film machine, platform stretch film machine, Jumbo Roll Stretch Film Machine, etc.