Inclined Vibrating Screens for Sale

These are the most common type of screen employed in the aggregate industry. The combination of inclined surface and vibration produces a continuous screening process during which the fines are rapidly segregated and pass through the screen 'mat' near the feed point. Retained 'oversize' and 'nearsize' particles are transported across the deck and repeatedly presented to the screen apertures to promote high efficiency of undersize removal. The devices are relatively simple, comprising a vibrating frame that may be fitted with a variety of screening surfaces, of modest cost and capable of providing high unit capacity. However, to benefit from these advantages it is most important that the screen is fed correctly, in particular that the entire width of the screen is used and that the feed rate is constant. A disadvantage is that the screen frame itself and the supporting structure must be designed to withstand the vibrational loads but enormous experience is now available. The use of an inclined screen obviously results in a greater headroom requirement and taller structures than horizontal screening equipment. All vibrating screens, by their nature, have a tendency to create noise and dust which may be mitigated by encapsulation and choice of screening surface.

The vibration of the screen can be generated by several means, e.g. eccentric rotation of a shaft, rotation of unbalanced weights or electromagnetic devices. In general, lower frequencies and greater amplitudes are used for the screening of coarser particles. Any element of the screen surface will describe an orbital motion in a plane at right angles to the screen surface.