Generating the high pressure necessary to force the melt through a shaping die. The Three Functional Zones

Beyond plastics, screw extrusion technology is vital in the (for snacks and pasta) and the pharmaceutical industry (for hot-melt extrusion of medications). Its ability to run continuously makes it one of the most efficient manufacturing processes in existence.

The channel depth decreases, compressing the material to remove air and forcing it against the heated barrel walls to melt.