Plastic extruder bearings are used in plastic extruders, so an important part of plastic extruders is the driving mechanism. It controls the rotation speed of the screw, which determines the output of the plastic extruder. The power required is determined by the viscosity (flow resistance) of the polymer. The viscosity of polymer depends on temperature and flow rate, and decreases with the increase of temperature and shear force. Plastic extruders are equipped with filter screens, which can block impurities on the filter screen. In order to avoid shutdown, the filter screen shall be able to be replaced automatically. This is particularly important when processing resins with impurities, such as recycled materials. The screw of the extruder is divided into feeding section, plasticizing section and melting section. The temperature is divided into 20, 36, 52, 65, 75, 95, 120 and 135 according to the process parameters of plastic particles and the model according to the screw diameter. After the plastic particles are heated, the original state is changed by the movement of the screw. There are many types, depending on the specific application. The capacity of frequency conversion is directly proportional to the diameter of screw, and then adjusted according to different raw materials.