Features: 1) Adopt cast iron platform and No. 45 steel post 2) Reasonable structure design 3) High intensity, corrosion-resistant 4) Rotate through motor to belt, worm gear, worm pole, screw cap to screw pole 5) Overload protection 6) High mould locking strength 7) Adopt standard pole pitch 8) Can guarantee speed and effectively prevent the middle panel from going up 9) Simple and convenient maintenance