: Raw materials (grains, plastic granules, or oilseeds) enter via a hopper.
: The screw's flight depth decreases, or the pitch narrows, causing the material to be squeezed. This creates shear heating (mechanical friction converted to heat) and pressure. shema press jekstrudernyj
: The homogenized "melt" is stabilized at a specific pressure and forced through a die or matrix to create the final shape, such as pellets, tubes, or oil cake. Typical "Shema" (Diagram) Flow Aluminum Extrusion Machine: Working Principle and Types : Raw materials (grains, plastic granules, or oilseeds)