摘要
注射成型传统水路设计受加工条件限制,导致水路无法贴近产品的几何外形,冷却效果不佳,整体冷却不均以及区域积热等翘曲成型缺陷无法妥善解决。以典型注射U型件为例,通过模流分析比较常规隔板式水路与异型水路对产品注射翘曲变形的影响。结果表明:采用较大的冷却水路管径和较小的水路与产品的间距,翘曲变形倾向则越小,造成U型件翘曲变形主要原因是塑件底部积热问题;异型水路更能促进产品整体均匀冷却,异型水路冷却效率比常规隔板式水路提高了33.6%,冷却时间减少了33.1%,产品翘曲变形量下降了21.4%;冷却方面的工艺参数优化对改善产品翘曲变形量作用有限。
The traditional water path design for injection molding is limited by the processing conditions,resulting in the water path can not be close to the geometric shape of the product,the cooling effect is not good,the overall cooling is not even and regional heat accumulation and other warpage molding defects can not be properly solved.Taking the typical injection of U-type parts as an example,through the mold flow analysis,comparing the impact of the conventional spacer-type water path and the profiled water path on the warpage deformation of the injection of the product.The results show that the warping tendency of U-shaped parts is smaller when the pipe diameter of cooling waterway is larger and the distance between waterway and product is smaller,the main cause of warping deformation is heat accumulation at the bottom of plastic parts.The Profiled waterway can promote the overall uniform cooling of the product,the cooling efficiency of the profiled waterway is 33.6%higher than that of the conventional bulkhead waterway,the cooling time is reduced by 33.1%,and the warping deformation of the product is reduced by 21.4%.However,the optimization of cooling process parameters has limited effect on improving the warping deformation of the product.
作者
林权
陈达权
刘其南
陈丽军
梁珍瑛
苏光富
吕新雨
LIN Quan;CHEN Daquan;LIU Qinan;CHEN Lijun;LIANG Zhenying;SU Guangfu;LYU Xinyu(School of Mechanical and Electrical Engineering,Wuyi University,Wuyishan Fujian 354300,China)
出处
《兰州工业学院学报》
2024年第3期70-74,共5页
Journal of Lanzhou Institute of Technology
基金
福建省本科高校教育教学改革研究重大项目(FBJG20220051)
2023年国家大学生创新训练项目(202310397008)。
关键词
U型件
模流分析
冷却系统
异型水路
冷却效率
工艺优化
翘曲变形
U-pieces
model flow analysis
cooling system
profiled waterway
cooling efficiency
process optimization
warpage deformation
