水辅助共注射成型充填过程的数值模拟研究

基于黏度幂率模型，建立了水辅共注成型充填流动过程的瞬态、纯薪性、非等温的理论模型，并采用有限体积法对水辅共注成型过程进行数值模拟。研究了内外层注射量、内外层熔体流变指数比、注水温度、注水速度、注水延迟时间、内层熔体温度和模壁温度等因素对充填过程的影响规律，并根据流变学理论阐述了其影响机理。

Numerical Simulation on Water-assisted Co-injection Molding Filling Process

Based on the power law model，a transient，pure viscous，non-isothermal theoretical model of water-assisted co-injection molding was developed, and finite volume method was adopted to simulate the filling stage of water-assisted co-injection molding process. The influence of these factors, such as inner-outer injection volume, inner-outer rheological index ratio, water injection temperature, water injection velocity, water injection delay time, inner melt temperature and mold temperature on the fluids filling patterns of water-assisted co-injection molding process were investigated. And the simulation results were explained theoretically based on rheological theory.