METHOD OF WORKING

The entire stack of sieves is gyrated on a horizontal plane. Immediately the Feed spreads evenly over the top sieve. The rotary movement of the machine conveys the stock on the sieve and some of the finer particles fall through the screen onto the sieve collecting tray, to be discharged at right angles into one of the THROUGH channels. Thus material Travels overthe sieve and falls on the top of the next sieve below which similar size seperation takes place.

The coarse material or overtails continue to travel overthe remaining sieves, turning over and reversing their direction of flow as they pass from sieve to sieve, until it reaches the bottom sieve from where oversize is discharged as TAIL product. During the sieving operation, the mesh apertures are kept constantly open by the action of cleaners bouncing against the holes of the underside of each sieving surface.

The main machine components are the base frame, driving motor, counter weights, eccentric mechanism, sieve carrying frame, sieve stack, sieve clamping mechanism, and the sieve mountings.

The sieve stack frames are made of extruded aluminium sections braced to give extra strength. The sieve insert clothing frames are specially developed aluminium section braced across the centre by supporting platform of wire mesh for cleaning pads.