基于Moldflow的保压曲线优化方法研究  

Packing Curve Optimization Methods Based on Moldflow

作　　者：张德强[1] 张琰[1] 孟小鑫[1] 李金华[1] 

机构地区：[1]辽宁工业大学机械工程与自动化学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2015年第1期37-40,共4页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：国家科技支撑计划项目(2012BAF12B08-5);辽宁省重点实验室资助项目(L2011101)

摘　　要：保压是注塑过程中的重要组成部分,合理的保压可以降低体积收缩差异,减小残余应力,改善翘曲变形。通过Moldflow的保压分析可以把分析过程放在计算机上进行,从而帮助模具设计人员准确确定合理的模具结构并帮助工艺人员确定合理的保压压力、保压时间和提高一次试模成功率。体积收缩分布不均的根本原因在于压力分布不均。因为产品各点总是存在压力梯度,所以使用保压曲线可以使体积收缩更均匀。通过多次试验的方法证明了填充末端压力的最高点与归零点的中点可以作为一个合理的恒压结束点,从末端压力曲线上也可以得到较好的二次衰减的起点,从而得到最佳保压曲线,很大程度上减小了制件的翘曲变形量。本文的结论可以为模流分析中调整保压曲线提供参考。Holding pressure injection molding process is an important part. Reasonable volume contraction holding pressure difference can be reduced, reducing the residual stress, improved warpage. analysis process can be carried out on the computer to help mold designers accurately determine a reasonable mold structure and help craft personnel to determine a reasonable holding pressure dwell time and improve the success rate of a test mode. Root volume shrinkage due to the uneven distribution of pressure is unevenly distributed. Because there is always a product of the points pressure gradient, using the packing curve can make more uniform shrinkage. This method through several tests prove that the highest point of the end of fill pressure and naturalized 0：00 midpoint constant can be used as a reasonable end point, a better starting point for a secondary decay and the best packing curve can also be got from the end of the pressure curve, largely reducing the amount of warpage parts. The paper may offer the reference for adjusting packing curve in mold flow analysis.

关 键 词：保压 翘曲变形 恒压 保压曲线 二次衰减 

分 类 号：TH12[机械工程—机械设计及理论]