The selection of raw materials is the most basic factor: the specifications and grades of PE raw materials are numerous and numerous. The same grade of raw materials can produce PE corrugated pipes but cannot produce PPH pipes. It is still necessary to do a lot of experiments here to choose the material suitable for the production of pipe fittings; the effect of temperature on the quality of PPH pipe fittings: temperature is the main factor affecting plasticization and the production of plastic pipe fittings. The temperature is too low, the plasticization is not good, and the temperature is too high , the material is easy to decompose. The temperature control should be determined according to the original formula, extruder and head structure, screw speed and other factors. When processing hard pipe fittings, since the processing temperature is quite close to the decomposition temperature, the material temperature at each point should be strictly controlled during production. At the same time, pay attention to the error of the temperature measuring instrument and the position of the measuring point. Influence of screw rotation speed on the quality of pipe fittings: The choice of screw rotation speed directly affects the output and quality. The rotation speed of the screw depends not only on the size of the extruder, but also on the diameter of the upper pipe. The rotation speed increases, the extrusion volume increases, and the shear force on the material is large, which is helpful for the plasticization of the material, but the residence time of the material in the screw is short, and the excessive friction heat makes the inner wall of the pipe rougher and the strength of the pipe fitting decreases. , PPH pipe plastic aluminum steady-state pipe structure is reasonable. Therefore, the control of screw speed should be weighed according to the requirements of output, product appearance and physical and mechanical properties.
