基于表面网格与流长搜索的浇口位置优化设计  

Optimal Design of Gate Location Based on Surface Mesh and Flow Path Length Search Scheme

作　　者：郑守银 张凌波[1] 孙蒙蒙 聂恒 ZHENG Shouyin;ZHANG Lingbo;SUN Mengmeng;NIE Heng(School of Information Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Yanfeng Plastic Omnium Automotive Exterior Systems Co.,Ltd.,Shanghai 201805,China)

机构地区：[1]华东理工大学信息科学与工程学院,上海200237 [2]延锋彼欧汽车外饰系统有限公司,上海201805

出　　处：《塑料》2023年第3期81-86,共6页Plastics

基　　金：国家自然科学基金(62076095)。

摘　　要：注射成型的浇口位置对获得高质量的注塑零件至关重要。为了提高浇口位置搜索的效率,提出了一种基于流动路径长度搜索的计算方法。该方法利用表面网格数据结合Dijkstra算法计算熔体在型腔内的流动路径,通过缩短浇口到最远边界点的流动路径的长度,减小目标函数,从而达到了模具型腔内充填平衡的目的。分别使用压力梯度搜索法和流长搜索法对2个研究算例进行分析。结果表明,与压力梯度搜索法和穷举法相比,使用流长搜索法对流动路径长度的极差进行优化的运算速度提升了77.3%以上。使用提出的方法充分利用了注塑模具的表面网格数据,有效地提高了浇口位置的搜索效率。Injection molding gate location was key to obtain high-quality injection molded parts.To improve the efficiency of gate location search,a new calculation method based on flow path length search was proposed.This method used the Dijkstra algorithm to calculate the flow path of the melt in the cavity based on the surface mesh data.It reduces the objective function by shortening the flow path length from the gate to the farthest boundary point,thereby achieving the purpose of flling balance in the mold cavity.The pressure gradient search scheme and the flow path length scheme were used to analyze the two research cases,respectively.The results showed that compared with the pressure gradient search scheme and the exhaustive search scheme,the operation speed of using the flow path length scheme to optimize the range of the flow path length was increased by more than 77.3%.Using the proposed method made full use of the surface mesh data of the injection mold,which effectively improved the search efficiency of the gate location.

关 键 词：浇口位置 流动路径 表面网格 DIJKSTRA算法 充填平衡 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]