长方体状注射模腔内纤维取向分布模拟计算  

Numerical Simulation of Fiber Orientation Distribution in Cuboid-Shaped Plastic Injection Mold Cavity

作　　者：何红[1,2] 陈雄兵[1,2] 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]高分子材料加工装备教育部工程研究中心,北京100029

出　　处：《塑料》2013年第4期1-5,共5页Plastics

摘　　要：通过数值求解长方体塑料注射模腔中纤维运动的Fokker-Planck方程,得到纤维在塑料熔体中三维取向张量。计算结果表明:模腔界面附近纤维主要沿流动方向取向,模腔对称的中心面附近主要发生厚度方向的取向,而且3个方向取向中,流动方向的纤维取向度最高。此外,考虑了影响纤维取向的工艺因素,如熔体入口温度和模腔壁温、充模时间。其中,充模时间的影响较显著。By solving the Fokker-Planck equation of fibers motion in the cuboid plastic injection mold cavity, fiber orientation distribution tensor in three-dimensional space of fiber suspension could be gotten. The calculation results showed that fiber alignment occurred mainly in the direction of melt flow near the cavity walls. In the center layer region of the cavity, fibers alignment primarily occurred in the thickness direction. The degree of orientation in the melt flow direction was the highest among three-dimensional orientation. In addition, Considering the process influence factors, such as the temperature of inlet melt, cavity wall and the mold filling time ,the impact of the mold filling time was obvious.

关 键 词：纤维取向 概率分布函数 纤维悬浮液 取向张量 注射模腔 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]