Screw Conveyor

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Related to Screw Conveyor: flight conveyor, chain conveyor, auger conveyor

screw conveyor

[′skrü kən′vā·ər]
(mechanical engineering)
A conveyor consisting of a helical screw that rotates upon a single shaft within a stationary trough or casing, and which can move bulk material along a horizontal, inclined, or vertical plane. Also known as auger conveyor; spiral conveyor; worm conveyor.

Screw Conveyor


a mechanism whose working member is a shaft with a continuous helical blade (the screw) or individual, pitched vanes. The rotating shaft, housed in a horizontal or inclined trough, moves loose or small piece cargoes or liquids along the trough. Screw conveyors are used in extruders, feeders, and other machines. They offer design simplicity and even feeding, but they have low productivity and efficiency because of the friction of the material against the walls. Feeding is regulated by the frequency of rotation of the screw. A screw conveyor was used in Archimedes’ screw, a device designed to raise water. Screw conveyors in which the screws of two adjacent machines rotate in opposite directions are used to mix materials.

References in periodicals archive ?
A screw conveyor and airlock are used at the bottom hopper of the pulse-jet dust collector to remove the dust collected on the bags.
This sanitary tilt-clown flexible screw conveyor on a caster-mounted frame can be maneuvered through narrow aisles and around corners.
A tilt-down flexible screw conveyor on a caster-mounted frame, which mates with the bulk bag filler's base frame, can be maneuvered through narrow aisles and around corners.
Bulk handling specialist Flexicon Europe has introduced a new Mobile Half-Frame Bulk Bag Unloader that integrates a multipurpose hopper with a flexible screw conveyor to create a unit that can improve plant efficiency by easy re-positioning to accommodate alternative bulk delivery stations as well as manual sack discharge.
The product includes a hopper, which is equipped with a hinged lid, feeds a flexible screw conveyor that transports bulk ingredients ranging from sub-micron powders to large pellets.
Greek mathematician and physicist Archimedes is acknowledged as the inventor of the screw conveyor in 235 to 240 B.C., and essentially his design has not changed since then.
Precise control of earth pressure is possible via operator control of the cutterhead, jacking speed and screw conveyor operation.
The bag dump station consists of a hopper, a dust collector, and a flexible screw conveyor.
In the automatic mode, the unloading system receives an input signal from the customer's mixer that simultaneously starts NBE's Bridgbuster massage paddles, transition hopper's mechanical agitator, and incline helical screw conveyor. Once the targeted batch weight has been reached, the above options are automatically stopped.
The SM-Shaftmount is available with an optional integral backstop clutch, CEMA screw conveyor kits and a unique two-way motor mount.