基于可压缩两相流模型的薄壁构件注塑充填模拟  

Injection molding filling simulation of thin-walled components based on a compressible two-phase flow model

作　　者：邹书琴 董勤喜 贾伟 于行 ZOU Shuqin;DONG Qinxi;JIA Wei;YU Hang(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;School of Marine Science and Engineering,Hainan University,Haikou 570228,China;DonSys Technology(Shandong)Co.,Ltd.,Jinan 250003,China)

机构地区：[1]海南大学土木建筑工程学院,海口570228 [2]海南大学海洋科学与工程学院,海口570228 [3]东玺技术(山东)有限公司,济南250003

出　　处：《工程塑料应用》2025年第2期92-99,共8页Engineering Plastics Application

基　　金：海南省院士创新科研专项(YSPTZX202106)。

摘　　要：基于可压缩两相流模型,对薄壁构件的注塑充填过程进行了模拟。针对厚度尺寸小于长、宽尺寸二十分之一的薄壁构件,研究其厚度方向上网格的划分标准,以及薄壁构件在充填过程中各物理量的分布规律。通过对等厚薄壁构件在厚度上划分不同层数的网格,分别进行充填模拟,分析相关物理量计算的准确性,得出当薄壁构件在厚度上的网格层数不少于7层时,能够对注塑充填过程进行较为准确的计算。据此标准,对两个薄壁构件进行了填充模拟,其中,等厚薄壁构件网格尺寸为0.2471 mm,网格总数551124个,厚度方向为7层;不等厚薄壁构件网格尺寸为0.2857 mm,网格总数为2262498个,厚度方向为7层。模拟结果与已有的实验结果和商业软件计算结果一致,验证了此薄壁构件网格划分标准的可行性。此外,对两个薄壁构件充填过程中的物理量分布特征进行分析,结果表明,型腔内部压力均在充填结束时表现为浇口周围较大,沿着熔体前沿流动方向的对称轴呈对称分布,在厚度方向上分布均匀,但速度在厚度方向上分布不均,通常在壁面附近速度较小,在型腔中心位置速度较大。The injection molding filling process of thin-walled components was simulated based on the compressible two-phase flow model.For the thin-walled components whose thickness is less than one-twentieth of the length and width,the mesh delineation criteria in the thickness direction and the distribution of physical quantities of the thin-walled components in the filling process were investigated.By filling simulation with the meshes divided into different layers on the thickness direction and analyz‐ing the accuracy of the results,it was concluded that when the mesh layers on the thickness direction is not less than 7,the injection molding filling process can be simulated accurately.According to this criterion,filling simulation for two thin-walled components was carried out.The grid size of equal-thickness thin-walled component is 0.2471 mm,the total number of grids is 551124,and the thickness direction is 7 layers.The grid size of unequal-thickness thin-walled component is 0.2857 mm,the total number of grids is 2262498,and the thickness direction is 7 layers.The simulation results are consistent with the existing experimental results and commercial software calculations,verifying the feasibility of the thin-walled component meshing standard.In addition,the phys‐ical quantity distribution characteristics of the two thin-walled cavities during the filling process were analyzed,and the results show that the internal pressure of the cavities are all larger around the gate at the end of filling,symmetrically distributed along the axis of symmetry of the flow direction,and uniformly distributed in the thickness direction.While the velocity is unevenly distributed in the thickness direction,is usually smaller near the wall,and is larger in the position of the center of the cavity.

关 键 词：可压缩两相流模型 薄壁构件 网格划分标准 网格尺寸 充填模拟 

分 类 号：TQ320[化学工程—合成树脂塑料工业]