What is the role of the extruder
2024-09
The main function of the extruder is to make the material fully plasticized and evenly mixed by the pressure and shear force generated by the rotation of the screw, and then molded through the die to produce various plastic products.
Extruder is a kind of plastic machinery, widely used in the plastics industry, for the production of pipes, rods, plates, films, monofilaments, wires, cables, profiles, hollow products. It can not only be used for granulation and mixing of plastics, but also for molding, filtration, plasticization of raw rubber, metal wire encapsulation, and desulfurization of reclaimed rubber in the rubber industry. In the synthetic fiber industry, the extruder, as a part of the spinning machine, is used to melt, plasticize and homogenize the spinning slices to provide qualified spinning melt for the spinning device.
Types of extruders include twin-screw extruders, single-screw extruders, and the like. Twin-screw extruders have the basic principles of extrusion of single-screw extruders, but the functions are more complex, including solid conveying, melt pressurization and pumping, mixing and stripping, and evaporation. Single screw extruder is mainly used to deal with a variety of thermoplastics, such as soft, hard PVC, polyethylene, etc., widely used in plastic pipes, plates, films, cables and other production.
The construction of the extruder includes the screw, the barrel, the heating and refrigeration system, the transmission device and the control device. The screw is the core component of the extruder, which is responsible for the transportation, compaction, melting, homogenization, pressurization and pumping of materials. The structure of each section of the extruder has its specific function, such as the feeding section is responsible for feeding, the reduction section is melted and reduced, and the extrusion section is the molten material extrusion molding.
In summary, the extruder, through its unique structure and working principle, plays a vital role in many fields such as plastics, rubber and synthetic fibers, and is an indispensable equipment in modern industrial production.
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