基于模流分析的破壁机外壳流动平衡与翘曲变形优化分析
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摘要
利用Moldex 3D软件对破壁机外壳的注塑成型进行模流分析,针对产品的翘曲变形、外观品质与真圆度评价指标进行探讨,找出三者的影响因素:浇口位置及数量、压力、温度,并提出改进的成型工艺方案。对比原单浇口进胶模具设计发现,浇口数量的增加有助于解决流动平衡问题,最后在双浇口模具设计的基础上优化最佳注塑工艺参数。相对于原始模具设计方案,产品的翘曲变形量降低了64.09%,体积收缩率降低了68.76%,内圈真圆度提高了76.92%,外圈真圆度提高了70.00%。
Moldex 3 D software was used to analyze the injection moulding of the shell of the wall breaker. The warpage deformation, appearance quality and roundness evaluation index of the product were discussed, and theirs influencing factors were found out: gate position and quantity, pressure and temperature, and the improved moulding process was put forward. Compared with the original design of single gate injection mould, it is found that the increase of gate number is helpful to solve the problem of flow balance. Finally, the optimum injection process parameters are optimized based on the design of double gate mould. Compared with the original design, the warpage deformation of the product is reduced by 64.09%, the volume shrinkage is reduced by 68.76%, the inner ring true roundness is increased by 76.92%, and the outer ring true roundness is increased by 70.00%.
Moldex 3 D software was used to analyze the injection moulding of the shell of the wall breaker. The warpage deformation, appearance quality and roundness evaluation index of the product were discussed, and theirs influencing factors were found out: gate position and quantity, pressure and temperature, and the improved moulding process was put forward. Compared with the original design of single gate injection mould, it is found that the increase of gate number is helpful to solve the problem of flow balance. Finally, the optimum injection process parameters are optimized based on the design of double gate mould. Compared with the original design, the warpage deformation of the product is reduced by 64.09%, the volume shrinkage is reduced by 68.76%, the inner ring true roundness is increased by 76.92%, and the outer ring true roundness is increased by 70.00%.
引文
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[2]芦亚萍.熔接痕的形成机理及控制方法[J].模具工业,2006,32(12):61-64.
[3]曾令琴,游小红.注射制品熔接痕影响因素与改善措施[J].模具工业,2008,34(6):71-74.
[4]郭继祥,李会.注塑件熔接痕的研究进展[J].塑料科技,2011,39(1):113-118.
[5]Chen W,Lin G S,Hu S J.A comparison study on the effectiveness of stepped binder and weld line clamping pins on formability improvement for tailor-welded blanks[J].Journal of Materials Processing Tech,2008,207(1):204-210.
[6]Brahimi B,Aitkadi A,Ajji A.Weld lines and mechanical properties of injection molded polyethylene/polystyrene/copolymer blends[J].Polymer Engineering&Science,1994,34(15):1 202-1 210.
[7]Koponen M,Enqvist J,Nguyen-Chung T,et al.Advanced injection molding mold and molding process for improvement of weld line strengths and isotropy of glass fiber filled aromatic polyester LCP[J].Polymer Engineering&Science,2010,48(4):711-716.
[8]傅建钢,卢炎麟.基于模流分析技术的塑件翘曲变形优化研究[J].机械,2016(2):13-17.
[9]赵建.基于翘曲分析的注塑模工艺参数的优化[J].中国塑料,2008(11):61-65.
[10]孙宝寿,陈哲,吴真繁,等.薄壁注塑制品翘曲影响因素分析及优化研究进展[J].机械制造,2009,47(12):25-29.
[11]陆玲梅,黄瑶,石凤健.基于预变形的汽车扰流板内板翘曲变形研究[J].现代塑料加工应用,2018(3):54-56.
[12]Huang M C,Tai C C.The effective factors in the warpage problem of an injection-molded part with a thin shell feature[J].Journal of Materials Processing Tech,2001,110(1):1-9.
[13]肖长江,刘春太,申长雨.注塑制件熔接痕的形成、性能和预测[J].工程塑料应用,2003,31(3):17-20.
[14]窦沙沙,夏建生.基于MOLDEX 3D手机外壳收缩翘曲变形分析及应用[J].机械设计与制造,2010(12):112-113.
[15]吴悦乐,唐佳,郑卫.Moldex3D在多模腔流道平衡设计中的应用[J].现代制造工程,2010(5):12-15.