Twin screw extruders are widely used for physical modification of polymers, and can also be used for extrusion of molded products. Its feeding characteristics are better, and it has better mixing, venting, and self-cleaning functions than a single screw extruder. Through the combination of different forms of screw elements, the twin-screw extruder with exhaust function designed in the form of building blocks can be used in the following aspects.
- Production of masterbatch
The mixture of plastic particles and additives is the master batch. Additives include pigments, fillers and functional additives. The twin-screw extruder is the key equipment of the masterbatch production line, used for the homogenization, dispersion and mixing of additives in the polymer matrix.
- Blending modification
Provide the best mixing performance between matrix and additives, fillers. Glass fiber is the most important reinforcing material, but other fibers can also be combined with polymer carriers. By adding fibers and combining with polymers, materials with high strength and high impact resistance can be obtained, and at the same time, weight and cost can be reduced.
Due to the mutual meshing of the two screws, the shearing process of the material at the meshing position continuously updates the surface layer of the material and improves the exhaust effect, so that the twin-screw extruder has better performance than the exhausted single-screw extruder. The exhaust performance.
- Direct extrusion
The twin-screw extruder can also combine mixing and extrusion molding. By using a specific head and appropriate downstream equipment, it can produce finished products in a more efficient manner, such as films, plates, pipes, and so on. Direct extrusion can omit the steps of cooling and pelletizing and reheating and melting, and the material is subjected to less thermal stress and shear stress. The whole process can save energy and the formula can be adjusted easily.