Cold beating lead screw plays the role of high-speed relative motion in the way of high-speed blowing shaft blanks, so that local plastic deformation forms a non-chip metal forming technique.

I remember that even in that desperate moment, with the cold wind blowing furiously through the dark shaft, I thought that it had all been worth it.

Wind power generated by fan blades (9) on the shaft enters a film picking barrel (5) through a wind blowing port (11) and blows the remnant films into a lifting film box (16).