微齿轮注塑成型填充过程数值模拟

Numerical Simulation for Filling Process of Micro-gear Injection Molding

针对微齿轮的注塑成型填充过程进行了数值模拟研究。利用正交试验对影响熔体填充的主要工艺参数:模具温度、熔体温度和流动速率进行了模拟。运用极差分析法和方差分析法对填充时间和填充率进行分析。结果表明,流动速率对微齿轮的填充时间和填充率的影响占主导地位。模具温度和熔体温度对填充时间的影响很小,几乎可以忽略。模具温度和熔体温度对填充率的贡献值不高,但模具温度高于熔体温度。另外,填充时间越短,填充率越高,热量损失是影响微注塑成型流动的主要原因。

Numerical simulation for filling process of micro-gear injection molding was studied. Using the method of orthogonal array, the main process parameters effecting the micro-gear filling were simulated, including mold temperature, melt temperature and flow speed. Based on the range analysis and variance analysis, the simulation results of the filling time and filling ratio were analyzed. The results showed that the flow speed had the greatest influence on had little influence on the filling time, melt temperature were not high, but temperature. Additionally, the shorter influencing on flow was heat loss. filling time and filling ratio. Mold temperature and melt temperature which could be negligible. The factor effect of mold temperature and the influence of mold temperature was higher than that of melt the filling time, the higher the filling ratio. And the main factor