1. Electric control part: the electric control part is composed of control cabinet and travel control device. 2. Main drive part: the main drive part is composed of main motor, main reducer, coupling, output gear, etc.

3. Working part: the working part consists of upper roller device, lower roller device, upper roller pressing device, balancing device, turnover part, frame and base.

(1) The upper roller device consists of upper roller, bearing seat and compound bearing.

(2) The lower roller device is composed of lower roller, lower roller input gear and composite bearing.

(3) Up roll down device up roll down device consists of motor, reducer, worm gear mechanism, nut lifting mechanism, etc. ；

(4) The balancing device is composed of bracket, screw, adjusting nut, etc. ；

(5) The turning part is composed of a turning frame, a handle, a rotating pin, etc. ；

(6) The frame and foundation frame are welded parts, and the foundation is welded parts, which should be annealed to eliminate stress.