基于Moldlfow的透射样品盒注塑模具优化分析

Injection mold optimization analysis of transmission sample box based on Moldlfow

透射样品盒主要用于保存薄片状的样品,防止样品表面沾染灰尘以及发生氧化。自主设计了一款结构简单,便于存取的透射样品盒。使用UG创建三维模型,利用Moldflow对所建立透射样品盒的盖子和底座的三维模型进行分析,经过对比得到最佳浇口位置。创建浇注系统和冷却系统后,设计正交实验,以熔体温度、注射时间、保压时间和保压压力为自变量,用翘曲变形量作为判断塑件质量的标准。通过分析得到优化后盖子的工艺参数组合为:熔体温度220℃,注射时间为5 s,保压时间为12 s,保压压力80%;底座的工艺参数组合为:熔体温度220℃,注射时间为4 s,保压时间为12 s,保压压力90%。优化后模具内温度变化均匀,盖子的翘曲变形量降低了40.7%。底座的翘曲变形量降低了11.8%。优化后的工艺参数相较初始参数得到明显改善,制品质量显著提升。

Transmission sample cassette is used to store a thin sheet of transmission sample to prevent dust and oxidation on the sample surface.A simple and easy-to-access transmission sample cassette was designed.The 3D model of the lid and pedestal of the cassette was created using UG and analyzed by Moldflow.After creating the gating system and cooling system,the orthogonal experiments were designed with melt temperature,injection time,holding time and holding pressure as the independent variables of the experiments,and the warpage deformation of the lid and pedestal as quality evaluation index.The optimized process parameter combinations for the lid were obtained through analysis:melt temperature 220℃,injection time 5 s,holding time 12 s and holding pressure 80%;optimized process parameter combinations for the base were melt temperature 220℃,injection time 4 s,holding time 12 s and holding pressure 90%.Compared with that before optimization,the warpage deformation of the lid was reduced by 40.7%.The warpage deformation of the pedestal was reduced by 11.8%.The optimized process parameters were significantly improved compared with the initial parameters,which led to a significant improvement in product quality.