摘要
某汽车拉杆装饰罩因注塑模具的冷却系统设计不当,造成产品出现明显的顶白缺陷。通过建立模具冷却系统的数学模型和汽车拉杆装饰罩注塑模具的三维模型,并利用Moldflow软件对该模具冷却系统进行了有限元仿真分析。结果表明,原模具冷却系统布局不合理,塑件平均温度为64.3℃,塑件凹槽处温度为100.5℃,表面温度分布不均,温度梯度大,产品全部存在顶白缺陷。对冷却系统布局进行调整修改后,塑件平均温度为46.5℃,凹槽处温度为68.32℃,缺陷部位温度较整改前下降32.18℃。保持注塑工艺条件不变,连续抽样3000件产品,产品缺陷消失,提高了产品质量和合格率。
Improper design of the cooling system in the automobile rod decorative cover injection mold led to the plastic parts to occur visible ejector white marks defect.In this study,both mathematical model of the mold cooling system and three-dimensional model of the decorative cover injection mold were established,and finite element simulation analysis was carried out based on Moldflow software.The results show that the layout of the cooling system in original mold was unreasonable;the average temperature of the plastic parts was 64.3℃,while the temperature of the groove was 100.5℃.Uneven surface temperature distribution and large temperature gradient were responsible for ejector marks.After the cooling system layout was adjusted and modified,the average temperature of the plastic parts was 46.5℃,the temperature of the groove was 68.32℃,with a decrease of 32.18℃.Keeping the injection molding process conditions unchanged,3000 products were continuously sampled.As a result,visible ejector white marks defect disappeared with improved product quality and pass rate.
作者
卯声松
张矿伟
郑绪东
王程娅
汤建国
陈焰
MAO Sheng-song;ZHANG K uang-wei;ZHENG Xu-dong;WANG Cheng-ya;TANG Jian-guo;CHEN Yan(Faculty of Inform ation Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,Yunan,China;School of Physics and Electronic Engineering,Yuxi Normal University,Yuxi 653100,Yunan,China;Technology Center of China Tobacco Yunnan Industrial Co.,Ltd.,Kunming 650202,Yunan,China)
出处
《铸造》
CAS
北大核心
2019年第12期1407-1410,共4页
Foundry
基金
云南省教育厅科学研究基金（2016ZZX201）
云南省科技厅科技计划（2018FD093）
作者简介
卯声松(1991-),男,硕士生,研究方向为自动化技术检测及控制。电话:15758011723,E-mail:921022515@qq.com;通讯作者:陈焰,男,高级工程师。电话:13211694197,E-mail:chy01@sina.com;汤建国,男,高级工程师。电话:15825147535,E-mail:jgtang@163.com。
