The States Rotary Screen provides an excellent method of removing core butts and tramp material from foundry sand.
The ideal mounting position for the Rotary Screen would be located on top of the Sand Storage Bin.
Return sand is conveyed to the receiving chute by either a bucket elevator or belt conveyor. The receiving chute directs the sand into the rotary drum. Lifting flights within the drum elevate and tumble the sand for through and efficient screening.
The screen, which can be built cylindrical or hexagonal in shape, rotates at a slow 14 R.P.M. which minimizes maintenance. Since there are no eccentric high speed vibrating shafts, counterweight and springs as in a vibrating unit, maintenance is much simpler.
The screen is completely enclosed with an exhaust outlet that can be hooked up to a dust and fume collector system. Heat, steam and dust are removed while cool air is drawn through the discharge end of the screen for added cooling.
The screen is driven with a TEFC motor, shaft mounted speed reducer and V-belt drive. V-belts are easily tensioned with a turnbuckle.
The screens main center shaft is mounted on “foundry-duty” spherical roller bearings. These bearings mount to the heavy steel mainframe weldment. Inspection doors in the base frame and covers have electrical safety interlocks that will automatically shut the unit off when opened. An internal discharge chute welded into the main frame directs tramp material to a discharge chute.
The States Rotary Screen is suited for both indoor and outdoor service. It is painted with one prime coat and one finish coat of machinery enamel.
Standard sizes are shown on Layout. Other sizes can easily be designed to meet your specific requirements. Various screen cloth materials, and opening sizes are also available.