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About Bulk Material Loaders and Unloaders

Bulk materials loaders and unloaders are used to fill and remove powders, granular substances and other bulk solids from bags, bins, boxes, carts, drums, hoppers, railcars, trucks, and silos. They often include solids feeders and can break down clumps or arches to allow for more uniform distribution of bulk materials. Some bulk materials loaders and unloaders are designed to handle abrasives or ceramics, chemicals or fertilizers, cosmetics or pharmaceuticals, construction materials or cement, food products, metals or minerals, and paints or pigments. Others are designed to handle pulp and paper, wood chips, polymers, adhesives, molding, coal, or wastewater sludge. Dry or free-flowing devices can handle a variety of dry materials. Wet or bridging devices can handle moist materials, slurries and dispersions; flakes and fibers; and other bridged materials with high aspect ratios. 

There are many types of bulk materials loaders and unloaders. Belt or apron feeders dispense material from a serrated or smooth belt that receives material from a hopper and is driven by a roller. Bin sweep arms use an auger to sweep the bottom of a bin or silo and a screw to pull material into a well. Drum or roll feeders consist of a hopper atop a solid or hollow roll. Dumpers or tilters reposition or empty storage containers by tilting them. Inverters or upenders also empty containers, but by rotating them 180°. Load arms or layer loaders are long tubes which rotate to feed materials evenly. Load spouts consist of a telescoping tube with a funnel-shaped end for the dust-controlled loading of hoppers, storage bins, shipping vehicles, or packages. Pneumatic or vacuum feeders use pressure to fluidize bulk materials and then push them to the process unit or vessel. Star feeders consist of a paddle wheel-shaped rotor that rotates slowly in order to dispense bulk material into a hopper or process unit. Table feeders consist of a hopper, skirt and rotating disc. Vibratory feeders include a hopper on top of a metal tray and an unbalanced motor or other controlled vibration source.

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Products & Services Related to Bulk Material Loaders and Unloaders

Dumpers, Tilters and Inverters
Dumpers, tilters and inverters are used to reposition or empty material handling containers.
Solids Feeders
Solids feeders are used to deliver powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.

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