Horizontal screens

Horizontal screens operating principle

Horizontal screens or screens with linear incidence, exploit the linear force of the drives placed at a different angle of incidence with respect to the horizontal surface.

By changing the angle degrees, you will also change the effect it has on the material: an higher angle of incidence towards the horizontal plane means material higher vertical jump on the net, favouring the screening efficiency but affecting the transport, if the angle tends more towards the horizontal plane, the material will slide easily on the net, favouring the transport.

The incidence angle generates the transport effect, therefore you can install inclined or horizontal screens.

The linear horizontal screens are used:

• When there are limitations in height and size
• When you want an accurate selection, with net opening equal to the nominal net opening of the selection surface
• When you want to obtain multiple product selections in line, not in cascade

Classification of horizontal screens

Horizontal screens are used in multiple applications for various types of products.
Vibroprocess continuously enriches its range of horizontal screens, searching for new, innovative solution for each of its projects

In all transport processes and in all processes in which the transport is an important factor ( eg. washing, grinding,… ) the product should move at a considerable speed. This effect can be obtained using unidirectional oscillators that induce an alternate linear movement to the machines ( forward up – back down ). This movement can be obtained in inertial oscillators by summing two counter-rotating centrifugal forces.

The unidirectional vibrators are obtained by coupling two counter-rotating shafts with eccentric masses keyed to their ends.

In our mechanical oscillators the counter rotation is obtained through coupling using the gears of the eccentric masses that are properly adjusted and kept in their place by the gears themselves.

In the electromechanical vibrators there is no problem with the synchronization. Infact the synchronization takes place automatically, without requiring gears. The vibrating motors of the screens rotate for short while and then automatically synchronize, maintaining the same number of rotations.

The resonance screens use another principle. The movement is induced to an insulating counter-mass that amplifies and transmits it through suitable reaction springs to the mass of the screening surface of the horizontal screen.