We offer sifting machine.Usage and Characteristics:WZDS Series Biaxial Self-synchronizing Elliptical (Linear) Equal-Thickness Vibrating Screens are applicable for the classification of sinter, pellets and ores in metallurgical and mining industry, as well as the stage dewatering and de-reagent in coal industry. In comparison with other types of screens of the same specification, WZDS Series have larger handling capacity, higher screening efficiency, simpler structure, easier operation, less malfunction and lower operating cost. WZDS Series are the first choice of large scale vibrating screen for large sinter plant, pellet plant, beneficiation plant, coal preparation plant and coal washery, and also an ideal alternative to large imported vibrating screens. Principle and Structure:Principle of Equal-Thickness Screen: WZDS Series Biaxial Self-synchronizing Elliptical (Linear) Equal-Thickness Vibrating Screens have a quasi-arc-shaped screen surface making up of three sections with different inclination angles. In the course of screening, the screen surface has approximately equal thickness in each section from entering to exiting of materials because the oversize materials become less with more materials passing through the mesh and materials move gradually slower due to shallower inclination.Principle of Self-Synchronization: Apply two motors of identical parameters to drive two groups of shafts without any synchronous transmission and connection devices. At the very moment of start, the two motors drive two eccentric blocks through two concentric shafts to rotate automatically and simultaneously.