Abstract: A rotary drum and vibratory conveyor system including a single walled rotary drum positioned above a vibratory conveyor assembly. The rotary drum may be segmented with each segment having end flanges that are connected to an adjoining segment with bolts. A section or sections of the rotary drum have perforations covered by a dust hood that allow sand and media to fall from the drum through a funnel structure onto the conveyor assembly. The vibratory conveyor assembly includes upper and lower conveyors, where the upper conveyor collects the media falling from the drum and passes the sand to the lower conveyor. The media may be redirected back to the drum inlet to be reused.

Abstract: A vibratory conveying apparatus including a material carrying member having a material supporting surface is disclosed. The apparatus includes first and second vibrators for producing first and second vibratory forces for imparting movement to the material carrying member at first and second acute angles to the material supporting surface. The vibratory forces of the first and second vibrators each have a vertical force component as well as a horizontal force component for imparting movement to a material on the material supporting surface in the first and second directions relative to the material supporting surface. The apparatus also includes an actuator for controlling the first and second vibrators in such manner as to impart controlled movement to the material relative to the material supporting surface in the first direction, the second direction, or vertically.

Abstract: The present invention relates to a method and apparatus to be used in the reclamation of foundry sand. Mold flasks containing foundry sand shaped by a pattern to form a cavity into which molten metal has been poured are, after the metal has set, subjected to greatly reduced atmospheric pressure whereby to cause the moisture in the foundry sand to evaporate into water vapor, thereby removing moisture and heat from the sand so that the particles can be reused free of lumps or clumping of sand.

Abstract: A vibratory apparatus is provided with an improved structure for varying the lead angle and the amount of the vibratory force by angularly and radially positioning a movable weight relative to a fixed eccentric weight. The apparatus comprises a plate supporting the fixed eccentric weight on the shaft in one of several positions with a line through the center of gravity of the fixed weight and the axis of the shaft forming a base line. The movable weight is carried by a cylinder attached to the plate so that the longitudinal axis of the cylinder passes through the axis of the shaft at an angle to the base line. The movable weight in the cylinder is movable from a position on one side of the axis of rotation to a second position on the opposite side of the axis of rotation, the movement being linear and radially across the axis of rotation.

Abstract: A vibratory conveyor arranged so that the vibrations have a substantially greater horizontal than vertical movement. More particularly, the vertical acceleration of material carried by the conveyor is less than the acceleration of gravity and therefore the material conveyed does not physically leave the surface of the conveyor. The result is a smooth flow of material from one end of the trough to the other.

Abstract: The invention relates to a method for treating moist pulverulent material and is particularly useful for removing the moisture from such material. In one aspect of the invention, the material is hot foundry sand, where the sand is first moistened by the addition of water and then the moist sand is treated in a vibrating container under vacuum.