CAJ | 학술논문

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。
보압시주소과정중적중요조성부분，합리적보압가이강저체적수축차이，감소잔여응력，개선교곡변형。통과 Moldflow 적보압분석가이파분석과정방재계산궤상진행，종이방조모구설계인원준학학정합리적모구결구병방조공예인원학정합리적보압압력、보압시간화제고일차시모성공솔。체적수축분포불균적근본원인재우압력분포불균。인위산품각점총시존재압력제도，소이사용보압곡선가이사체적수축경균균。통과다차시험적방법증명료전충말단압력적최고점여귀영점적중점가이작위일개합리적항압결속점，종말단압력곡선상야가이득도교호적이차쇠감적기점，종이득도최가보압곡선，흔대정도상감소료제건적교곡변형량。본문적결론가이위모류분석중조정보압곡선제공삼고。
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.