2023-01-29
Twin Screw Extruder has the advantages of high conveying efficiency, strong dispersing and mixing ability, good self-cleaning performance, short residence time of materials in the machine, uniform distribution and good adaptability, etc. It is widely used in the modification of different plastics before, blending between plastics and rubber, blending of various additives with plastics, glass fiber, carbon fiber reinforced plastics, etc. It is the first choice of continuous mixing equipment for polymer modification.
The two main application areas of twin-screw extruder are: extrusion and molding of heat-sensitive materials, such as PVC pipes and profiles; processing of special polymers, such as co-blending, exhaust, chemical reactions, etc. Twin screws for profile extrusion have intermeshing screw ribs and grooves and operate at low speeds, within about 10 r/min.
Compared to single screw, twin screw extruders have much superior feeding performance, especially those with south corner feeding and easy slippage, such as fibrous, powdery and greasy materials. The short and uniform material retention time, better mixing and larger heat transfer area allow for good temperature control of the material, which is especially important for processing heat-sensitive materials.