Flip Flow Screens are used to screen the material having high moisture and sticky in nature where the circular motion or any conventional mechanical vibrating screen becomes inadequate to cater the requirement. Bevcon flip flow screen motion is versatile compared to other flip flow screen technologies. The particle motion of Bevcon flip flow screen takes an elliptical path.
This versatile motion extends a trampoline effect of screening media. Very high G forces up to 50G are achieved through this action. Flip flow screen consists of two baskets (Inner & outer) mounted on a common shaft. However the centre axis of both the baskets is not same but inner basket is having a slight eccentricity.
The screen consists of two screen frames, inner and outer. The frames are counter currently oscillated by the eccentric shaft. The circular movement of the drive shaft is transformed into oscillation of the screen frames by means of helical springs. The outer screen frame is suspended from the inner frame by guide springs, permitting horizontal movement. The inner screen case is supported by means of rubber insulated springs. The cross beams supporting the elastic screen mats are alternately connected to the inner and outer screen case. The movement of the screen frames results in a change of spacing between the cross bars and the screen mats are tensioned and detensioned from 8-16 times per second.
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