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对传统光滑机筒单螺杆挤出机、固体输送段沟槽机筒单螺杆挤出机和熔融段沟槽机筒单螺杆挤出机的结构特点、输送机理、熔融热源以及熔融模型进行了对比分析,并对其熔融过程中熔融速率、熔融长度和熔融起始点进行了数值模拟,根据模拟结果分析了机筒结构形式对单螺杆挤出机熔融性能的影响。结果表明,机筒内壁开设沟槽的单螺杆挤出机在结构、机理和性能等方面均优于传统光滑机筒单螺杆挤出机,且将机筒沟槽由固体输送段延伸至熔融段对单螺杆挤出机的熔融性能有显著的提高。
The structure characteristics, transport mechanism, heat of fusion and melting model of the traditional single-screw extruder with smooth barrel, single-screw extruder with grooved barrel in solid transfer section and single-screw extruder with grooved barrel in fusion section were compared The melting rate, melting length and melting point of the melt were numerically simulated. Based on the simulation results, the influence of barrel structure on the melt properties of the single screw extruder was analyzed. The results show that the single screw extruder with grooves on the inner wall of the barrel is superior to the conventional smooth barrel single screw extruder in terms of structure, mechanism and performance, and extends the barrel groove from the solid conveying section to the melting section The single screw extruder melt performance has been significantly improved.