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.
出处
《塑料》
CAS
CSCD
北大核心
2013年第4期1-5,共5页
Plastics
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
fiber orientation
probability distribution function
fiber suspension
orientation tensor
injection mold cavity
