中国塑料2017，Vol.31Issue(3)：76-81,6.DOI:10.19491/j.issn.1001-9278.2017.03.014
大型薄壁注塑件型腔内熔体缩痕缺陷形成机理分析及成型参数优化模型的研究
Formation Mechanism Analysis of Melt Sink Mark Defects Inside Mold Cavity for Large Thin-wall Plastic Parts and Parameters Optimization Model of Molding Process
胡邓平 1伍先明 2陈立锋 3张静秋1
作者信息
- 1. 广东科技学院机电工程系,广东东莞523083
- 2. 湖南科技大学难加工材料高效精密加工技术湖南省重点实验室,湖南湘潭411201
- 3. 湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201
- 折叠
摘要
Abstract
Based on the case study of air-conditioning plane frames,sink mark formation and evolutionary mechanism in a mold cavity were analyzed.Influence of bad thermal intersection and stress along the direction of wall thickness vertical to mold cavity on the formation of sink mark were achieved,and the vertical pressure difference between the both sides of cavity wall thickness was confirmed.It was found that the greater the pressure difference,the deeper was the sink mark.The studies indicated that,with a melt temperature of 191.5 ℃,a relative pressure maintaining pressure of 85.5 ％,a mold temperature of 33.6 ℃ and injection time of 2.3 s,the optimum process parameters for the air-conditioning plane frame were achieved by using genetic algorithm and the minimum shrink mark index was calculated to be 1.352.Through a comparative investigation on injection experimental results and simulation values,and the exact value of sink mark depth and the sink mark index should be set to 0～0.05 mm and 0.38 ％～1.43 ％ under the combination of optimized process parameters,respectively.关键词
大型薄壁注塑件/缩痕/演化机理/热交汇差/工艺参数组合Key words
large thin-wall injection-molded part/sink mark/evolutionary mechanism/bad thermal intersection/combination of process parameter分类
化学化工引用本文复制引用
胡邓平,伍先明,陈立锋,张静秋..大型薄壁注塑件型腔内熔体缩痕缺陷形成机理分析及成型参数优化模型的研究[J].中国塑料,2017,31(3):76-81,6.
