论文部分内容阅读
以脉动压力诱导注射成型充模过程浇口流道中熔体壁面表观剪切黏度的数学模型为基础,通过实时测量记录螺杆位置变化以及浇口流道两端熔体压力变化,表征脉动压力诱导注射成型充模过程熔体实时表观剪切黏度的方法,通过实验研究发现,脉动压力的引入使充模过程、熔体的剪切应力和表观剪切黏度降低,同时加剧了熔体的剪切速率变化,在强烈的振动条件下会引起动态充模过程中某些时刻出现断流现象。
Based on the mathematical model of the apparent shear viscosity of the melt wall in the runner flow channel induced by pulsating pressure during injection molding, the pulsating pressure was induced by the real-time measurement of the screw position and the change of melt pressure at both ends of the runner. The experimental results show that the introduction of pulsating pressure reduces the filling process, the shear stress and the apparent shear viscosity of the melt, and aggravates the melt’s Changes in shear rate, under intense vibration conditions, can cause a broken current at some point during the dynamic filling process.