分层反压注射成型厚壁光学透镜的工艺分析

为了研究反压压力对成型厚壁光学透镜的影响，利用自行开发的分层反压注射成型厚壁光学透镜的实验方案，通过正交实验优化设计开展了工艺参数优化实验，研究了在不同分层方式下内外层反压压力对对厚壁光学透镜光学性能的影响，从而根据正交优化参数组合成型具有优异光学性能的理想厚壁光学透镜。 正交实验研究结果表明，使用聚甲基丙烯酸甲酯（PMMA）为厚壁光学透镜的原材料进行分层反压注射成型，能够有效减少厚壁光学透镜收缩率，同时随着内外层反压压力的提高，厚壁光学透镜的透光率和折射率均不同程度的得到提高，透镜光学性能优异。

Process Analysis of Layered-counter-pressure Injection Molding for Thick-wall Optical Lens

In order to study the influence of back pressure on the formation of thick-walled optical lens,an experimental scheme for the layered-back-pressure injection-molded thick-walled optical lens was developed in this work,and an optimization experiment for the process parameters was conducted by the orthogonal experiment optimization design.The effect of the inner and outer back pressures on the optical properties of the thick-walled optical lens in an layer mode was investigated so as to fabricate an ideal thick-walled optical lens with excellent optical properties on the basis of the orthogonal optimization parameters.The orthogonal experimental results indicated that the shrinkage of the thick-walled optical lenses could be reduced effectively by use of PMMA as a raw material during the layered back-pressure injection molding process.The light transmittance and refractive index of the thick-walled optical lens were improved with an increase of the back pressure of the inner and outer layers,indicating excellent optical properties.