Understanding high-speed,energy-input (HSEI) twin-screw extruders

摘要

Twin-screw extruders have historically been used to produce pellets to facilitate accurate and consistent feeding into a secondary processing device,such as an injection molding machine or single-screw extruder.There is also a fast-growing trend to bypass the pelletization step to produce a film/fiber/sheet/profile from the twin-screw extruder.This is referred to as direct extrusion.Regardless of the end product,the unit operations performed in the twin-screw extruder are identical.