对三螺杆排气挤出机设计3种不同的螺杆组合,在不同的螺杆转速和喂料速度下加工PET,研究三螺杆排气挤出机在加工过程中的各工艺参数,对于无需预干燥加工的PET力学性能的影响规律。通过对3种螺杆组合加工出的试样进行研究得出结论:对于特定的材料和工艺,存在1个最佳工作点,在稳定的工作条件下,实现PET的无需预干燥加工,而且保持了较好的力学性能。 Three different screw combinations were designed for the three-screw exhaust extruder. PET was processed at different screw speeds and feed rates to study the process parameters of the three-screw exhaust extruder during the process. Without pre-drying Processing of PET mechanical properties of the law. A study of the samples machined from the three screw combinations concluded that for a given material and process there is an optimum operating point for PET without pre-drying under stable operating conditions, Better mechanical properties.