Spiral duct machine is a machine for producing spiral duct. Spiral duct, also known as spiral bite thin wall tube, is a thin wall tube made of metal strip rolls with spiral bite. Round, no welding, no air leakage, no water leakage. , Instead of the traditional iron pipe (ie, hand-sewn iron pipe). It is a type of wind pipe. The straight pipe of the whole mechanism does not need to be beaten by hand.