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Screw extruders are divided into single-screw extruders and twin-screw extruders. As a conventional plastics mechanical device, screw extruders are a type of energy-intensive device in plastic machinery and equipment, and they are in the context of a low-carbon economy. , Green new products will inevitably become the trend of development, screw extruder is in this context, began to move toward low-carbon environmental protection.copper sand blast CNC turning product OEM&ODM
At present, resistance heating and screw transfer plasticization are still the most important methods for plastic fusion molding, but the industry has never stopped the exploration of different melting methods. In the earlier years, South China University of Technology proposed the theory and technology of electromagnetic dynamic plasticization, and electromagnetic induction heating technology is also being accepted by more and more extrusion, injection processing and equipment manufacturing companies. Recently, many new melt plasticizing technologies have emerged in the market.
The new raw material plastic screw extruder completely abandons the shear and friction transport and plasticization mechanism of conventional screw plastic extruders, but adopts the transport mechanism based on normal stress. The extruder is composed of several sets of blade plasticizing extrusion units connected in series. Each group of plasticizing extrusion units has a structure similar to a vane pump in a hydraulic system and consists of a pump body, an eccentric rotor and blades.CNC Milling Aluminum Sand Blast Part OEM&ODM
During work, the material enters from the large end of the eccentric chamber and is then pushed by the vane to the small end of the chamber and extruded to the next unit, during which the material is completely ground, compacted, vented and plasticized under normal stress. The amount of material transported in this process is determined by the volume change of the cavity in the pump, and the transport efficiency is basically not affected by the material rheological properties. Therefore, the extrusion volume during the extrusion process is affected little by the die pressure and the extrusion characteristics are hard. In addition, the residence time of the material in the extruder is more uniform, which reduces the difference in the thermal history of the material.