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由于挤出机各段温度控制对于挤出性能起着决定性的作用,因而对冷喂料挤出机挤出过程中热量的传递进行研究是至关重要的。本文详细地从理论上分析了挤出机对胶料的机械加工带来的热量是如何传递出去的,并在此基础上,推导出在生产实际中挤出过程胶料在各段的平均温度分布。 相似文献
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A novel kind of extruding machinery is proposed—a tri-screw extruder (TRISE), in which three intermeshed screws are arranged in the three corners of a triangle; three meshing regions and a center zone also comprise the special construction. The flow rate and the pressure-generating ability of the melt in the thread-zone flow field of the tri-screw extruder, especially the pumping formed by the action of taking in and sending out melt in the unique center zone, are also described. The results of simulation and experiments clearly show that the tri-screw extruder has stronger conveying capacity. The shear frequency of material in the tri-screw extruder is higher than that in the twin-screw extruder, which means that filler could be loaded to a much higher point in the TRISE than in the twin-screw. Results from the TRISE also show that energy consumption of the TRISE is lower than that of the twin-screw extruder. 相似文献
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李晓翠;彭炯;陈晋南 《中国塑料》2010,24(2):109-112
用正交设计法设计了9组不同排布的销钉单螺杆。采用混合熵作为评价销钉单螺杆混炼段混合性能的指标,数值研究了不同销钉结构的单螺杆混炼段内聚丙烯熔体的等温流动过程,考察了一个导程内销钉排数、每排销钉个数和销钉高度对销钉单螺杆混炼段混合性能的影响。结果表明,在所设计的正交试验中,沿螺杆挤出方向各截面的混合熵逐渐增大,出口处该值达到最大;在销钉螺杆混炼段一个导程内安装5排,每排5个高度为12 mm的销钉时,其混合性能较优。 相似文献
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