Screw Conveyor
A screw conveyor is a bulk-material handling machine that uses a rotating helical screw blade, or auger, inside a tube or trough to move granular, powdery, semi-solid, or small-piece materials. It transfers materials horizontally or at slight incline, and can also feed, batch, mix, heat, cool, or aerate in process lines.
On the shop floor, a screw conveyor sits beneath a hopper, silo, dump station, or bin, moving raw materials like flour, pellets, cement, grain, resin, ash, or powdered chemicals into downstream process equipment at a controlled rate. In warehousing, it unloads bulk bags, discharges stored material from silos, and feeds packaging, blending, or size-reduction equipment in a compact footprint where belt conveyors are impractical. For raw-material tracking, the conveyor does not identify inventory; it acts as a control point where weight-based batching, recipe dosing, or feeder controls determine how much material leaves inventory and enters production, making it a key mechanical interface between physical stock and ERP/MES consumption records. Operators must manage inlet feed consistency, material flow properties, and throughput limits because screw conveyors are usually control-fed by another device, such as a rotary airlock or screw feeder. Enclosed screw conveyors reduce contamination and material loss in powder applications.
What is the main difference between a screw conveyor and a screw feeder?
A screw conveyor primarily transfers material from one point to another, while a screw feeder is designed for more controlled metering into a process; screw conveyors are often control-fed by a feeder or upstream device.
Why are screw conveyors common in powder and granular handling?
Their enclosed helical motion provides continuous, compact, and relatively dust-controlled transport of powders, granules, pellets, and small solids.
What operational data should be tied to inventory systems?
Feed rate, run time, discharge rate, batch weight, and hopper/silo level are the key variables to reconcile material movement with ERP or MES consumption records; this is especially important when the screw conveyor is part of a recipe dosing or bulk unloading station.