微透镜阵列注射压缩成型的残余应力

Residual force of microlens array by injection compression molding

利用Autodesk Moldflow Insight软件,通过正交实验仿真分析熔体温度、模具温度、压缩速度、压缩距离、压缩压力和压缩延迟时间这6个因素的工艺特性,并进行极差分析。按照压缩框主轴压缩的方式制作注射压缩模具,采用单因素实验设计研究熔体温度、模具温度、压缩速度这3个主要因素的工艺特性,运用应力-光学定律,根据测量所得光程差间接得到平均残余应力。研究结果表明:模具温度对残余应力的影响最大,其次是压缩延迟时间和熔体温度;残余应力随模具温度的升高而降低,随熔体温度的升高先减小后增大,随压缩延迟时间的增加而上升。

Melt temperature,mold temperature,compression speed,compression distance,compression pressure and compression delay time were studied to simulate the process properties by the orthogonal experimental design using the Autodesk Moldflow Insight software.Range analysis was conducted,and the injection compression mold was designed using the compression frame driven by spindle to experimentally study the effect of the melt temperature,mold temperature and compression speed on the residual force of microlens array(MLA).Injection compression experiments were made with single factor experiment method.Stress-optic law was used to switch the optical path difference on residual stress.The results show that mold temperature is more significant than any other parameters,followed by compression delay time and melt temperature.With the increase of mold temperature,the residual stress of the microlens array tends to decrease.The residual stress decreases at first and increases later with the increase of melt temperature.The residual stress increases with the increase of compression delay time.