variable frequency screw conveyor with angle 380V operational principle The bulk material feed into the casing and trinal screw flight was hold back by the frication resistance acted on the wall of casing during running, the screw flight pushed the material and made the material do axial movement, simultaneity the clockwise and counterclockwise fight act as mixer. The material can be discharged at the proper outlet at the bottom of casing or transport out at the end of chute. Features 1.Large load capacity , safety and reliability ; 2.Well-adapted, convenient to install and maintain, long life; 3.Small size ,high rotation speed; 4.Flexible arrangement on position of inlet and outlet;