注射成型中塑料熔体流动前沿的分析  

Analysis of Polymer Melt Flow Front in Injection Molding

作　　者：张华[1] 李德群[1] 陈兴[1] 

机构地区：[1]华中理工大学模具技术国家重点实验室

出　　处：《塑料》1998年第6期19-21,共3页Plastics

基　　金：高等学校博士学科点专项科研基金

摘　　要：根据流体的基本运动定律和分析精度的要求，讨论了塑料注射成型中熔体前沿喷泉效应的近似处理方法和数值分析方法。Polymer melt front flow contributes significantly to fiber orientation in injection molding because of fountain flow of the front region,which is the phenomenon of dece leration and outward motion of fluid particles.So it is important to analyze front flow reasonably according to precision requirements in computer simulation of injection molding.In idealized fountain flow,a simple model is applied based on conservation of mass,in which the fountain flow region is simplified to a straight line that moves with the average front velocity.While consideration is given to the shape of the free surface or the flow details near the advancing front,fountain flow can be analyzed by solving the steady state equations for mass and momentum with reasonable assumptions and boundary conditions.

关 键 词：数值分析 注塑成型 塑料 熔体流动 成型 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]