The screw conveyor has an extensive history. Archimedes (ca. 212 BC) invented the first screw conveyor, and his design is still used today for irrigation and grain transfer. Screw conveyors became ...

Used for producing pasta, plastics, and more, extrusion is a widely used technique to combine and shape materials. Now, researchers report using twin-screw extrusion–where two solid reactants mix via ...

Screws may be commonplace, but that doesn't mean they're simple. A screw is any shaft with a corkscrew groove carved around its surface and, regardless of their design, screws are usually used to ...