Production Analysis Of Wood Plastic Material Equipment

The processing technology of wood-plastic composites varies greatly. Nowadays, there are not many equipment which can be used in wood-plastic composite materials. Now, only single-screw extruder and twin-screw extruder are needed.

Single screw extruder usually completes the task of conveying and plasticizing materials. However, the traditional single screw extruder needs special design of screw, so that it has a strong ability to transport raw materials and mix and plasticize, so as to achieve the process of mixing and granulating materials before extrusion.

The twin-screw extruder relies on the principle of positive displacement to transport and process materials. It can directly process wood flour or plant fibers. The drying of wood flour can be separated from the melting resin process. The conical twin-screw extruder has a larger diameter of the feeding section of the conical screw than the "mixing" type equipment, which can compress the material continuously, shorten the residence time of the material in the barrel, while the diameter of the metering section is small and the shear of the molten material is small. This is a great advantage for processing thermoplastic wood-plastic materials, so it is called "profile" type design with low speed and low energy consumption. Prepare.

In addition, the extruder head and cooling system are also important components related to the quality of extruded products. In addition to ensuring smooth transition and reasonable flow distribution of the runner design, the design of the nose also needs to focus on the pressure building capacity and temperature control accuracy of the nose, and reasonably arrange the heating and cooling device of the nose, so as to make the cooling speed and accuracy high, and achieve the purpose of ensuring product quality and output.