POWDER FEEDER™ "U-TROUGH"

Problem: Conventional feeders cannot reliably meter difficult powders
It is difficult to achieve reliable feeding of powders such as Cabosil®, TiO2 and other sticky and cohesive powderswith conventional feeders. These powders create problems such as flooding, or bridging above the feed screw andthus interrupting flow. They can also bind the screw flights and thus damage the equipment and halt production.

Normal adjustable operating range is a 20:1 turndowncapability from maximum feed rate. Special ranges areavailable.

Solution: Patented system that assures reliable metering The patented Thayer Scale “U-trough” hopper and feed section provides the first practical and economical means for metering difficult powders. The geometry of the trough and agitator effectively de-aerate and contain the powder on initial fill cycle to help prevent flooding. An independently driven agitator maintains optimum material conditioning while screw speed can vary to control flow rate. Material does not build up within the trough or feed tube, preventing binding or erratic feed. In conjunction with a THAYER® Loss of Weight scale system, the Powder Feeder U-trough provides the most reliable and accurate feed system for difficult powders

No Flood Design
Stream of Material is deflected by the agitator bar, than curved
sidewalls. Material velocity is reduced, controlling the tendency
to aerate and flood.