round duct making machine for spiral duct machine

YOUTUBE VIDEO https://www.youtube.com/watch?v=kvX-cXgnh44 Performance features: In a given processing of the diameter of the spiral duct diameter scope, the need for pipe die, using different lengths of steel belt, through the proper installation and debugging steel band instead of pipe die. Length and can be used according to demand, and high-speed synchronous automatic cutting system for cutting. Working flow: 1.Patented mold, easy to adjust, and has its own patent, replace