... is made up of electric motor, speed-reducing box, dividing box, feeding system, screws, barrel, stander, cutter, ... . Passing through shaft joint, speed-reducing box and dividing box, the screws running speed is 5-62rpm ... the torque into two screws through dividing box, making sure the equal division of the torque.4 ... easy-damaged screw is covered by alloy, making the service life of screw longer.4.7 ...