塑料盖注塑成型方案分析及翘曲变形参数优化  

Analysis of Plastic Cover Injection Molding Scheme and Optimization of Warpage Deformation Parameters

作　　者：卢松涛[1] 王培安 LU Song-tao;WANG Pei-an(School of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu 476000,China)

机构地区：[1]商丘工学院机械工程学院,河南商丘476000

出　　处：《塑料科技》2020年第2期105-111,共7页Plastics Science and Technology

基　　金：河南省第八批重点学科“机械制造及其自动化”资助项目(2012SJGLX289)。

摘　　要：以塑料盖作为研究对象,获得最优成型方案,预测塑件成型后的翘曲变形程度以提高塑件质量。初步提出两种注塑工艺方案加工塑料盖,使用Moldflow软件对两种方案注塑过程进行模拟对比分析,对产生翘曲缺陷的原因进行研究;利用五因素四水平的正交试验,以减小翘曲变形程度作为优化目标,优化工艺参数。模拟结果表明:方案二为最优方案,且翘曲变形主要是由收缩不均匀以及取向不均匀而造成的,翘曲变形程度最小的工艺参数组合为熔体温度250℃、模具温度60℃、保压时间12 s、冷却时间12 s、填充时间0.9 s,优化后比优化前翘曲变形程度降低9.4%左右,熔料熔接和材料性能也有所改善,塑料盖整体质量提高。实验可有效地缩短塑料盖的研发周期,降低生产成本,提高塑料盖的研发成功率。Taking the plastic cover as the research object, the optimal forming scheme was obtained, the degree of warpage deformation of the plastic parts was predicted, and the quality of the plastic parts was improved. Two kinds of injection molding schemes were proposed to process plastic covers. Moldflow software was used to simulate and compare the injection molding process of the two schemes, and the causes of warpage defects were studied. Five-factor four-level orthogonal test method was used to reduce the degree of warpage deformation,which was used as the optimization target to optimize process parameters. The simulation results show that the second scheme is the optimal scheme, and the warpage deformation is mainly caused by the uneven shrinkage and the uneven orientation. The combination of the process parameters with the smallest warpage deformation is the melt temperature 250℃ and the mold temperature 60℃, pressure holding time 12 s, cooling time 12 s, filling time 0.9 s, at which the degree of warpage deformation is reduced by 9.4% compared with the unoptimized condition. The fusion welding and material properties are also improved, and the overall quality of plastic cover is upgraded. The scheme effectively decreases the development cycle of plastic covers, reduces production costs, and improves the R&D success rate of plastic covers.

关 键 词：成型方案 翘曲缺陷 MOLDFLOW软件 正交试验 

分 类 号：TQ320.72[化学工程—合成树脂塑料工业]