What is an air ring?

An air ring is a device used in various industrial applications, particularly in extrusion processes, to create a uniform film or sheet of material. It consists of a circular nozzle that ejects a flow of air, which cools and shapes the molten polymer as it emerges from a die. This cooling process helps in solidifying the material quickly, ensuring consistent dimensions and quality in the final product. Air rings are commonly used in the production of plastic films and sheets.