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借助流体动力学软件Polyflow对单螺杆挤出机压缩段进行简化建模与模拟仿真,研究了稳态与动态加工成型条件对螺槽流道内速度场、压力场、剪切速率场、黏度场等物理场的影响。结果表明:振动强化成型时,各物理场随时间动态变化,熔体流动性能得到显著改善,有利于提高物料的塑化性能;振幅及频率较小时,各物理场变化与稳态成型时相差不大,而较大的振幅及频率对各物理场影响较大;振动强化延长了物料的停留时间增,强了横向剪切作用有,利于提高物料的分散混合性能。
With the aid of the fluid dynamics software Polyflow, the compression and compression of the single screw extruder were simulated and simplified. The influences of steady state and dynamic forming conditions on the velocity field, pressure field, shear rate field and viscosity field The impact of physics. The results show that when the vibration is intensified, each physical field changes dynamically with time and the melt flow property can be remarkably improved, which helps to improve the plasticizing property of the material. When the amplitude and frequency are small, the differences between the physical fields and the steady state are not significant Large, and larger amplitude and frequency of the greater impact on the physical field; vibration enhanced to extend the retention time of the material, the strong role of lateral shearing, which will help improve the material’s dispersion mixing performance.