基于Moldfl ow的注塑光学厚壁透镜工艺优化

Process Optimization of Injection-Molded Optical Thick-Walled Lens Based on Moldflow

利用Moldflow数值模拟分析并结合正交试验法,以光学厚壁透镜制品的光相移角度(双折射)为参照,对注塑光学厚壁透镜的工艺条件进行优化,且模拟分析了分层注射对注塑光学厚壁透镜残余内应力的影响规律。结果表明:优化注射工艺参数能够降低制品的残余内应力,减小光学透镜的双折射缺陷,其最优注射条件为:模具温度90℃、熔体温度240℃、注射时间9 s、保压压力60 MPa。此外,分层注射可以有效减小制品的残余内应力,并使其分布更加均匀,该效果与分层方式以及层厚、层数有关。

Moldflow numerical simulation analysis combined with orthogonal experiment method was used to optimize the process conditions of injection optical thick-walled lens with reference to the phase shift angle(birefringence)of optical thick-walled lens products.The influence law of layered injection on residual internal stress of the injection-molded optical thick-walled lens was analyzed.The results show that the parameter optimization of injection molding process can reduce the residual internal stress and the birefringence defects of the optical lens.The optimum injection conditions are as follows:mold temperature of 90℃,melt temperature of 240℃,injection time of 9 s,holding pressure of 60 MPa.Moreover,the layered injection can effectively reduce the residual internal stress of the product and make the residual internal stress more uniform.The effect is related to the layering method,layer thickness and layer number.