Water-Assisted Co-Injection Molding of Non-Circular Tubes

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Kuang, T.Q.^1 ; Xu, P.^1 ; Feng, Q.^1 ; Turng, L.S.^2

School of Mechatronics and Vehical Engineering, East China Jiaotong University, Nanchang, China^1

Department of Mechanical Engineering, University of Wisconsin-Madison, WI, United States^2

关键词: Computational fluid dynamics methods;    Cross section shape;    Injection molding process;    K-Omega turbulence model;    Moving interface;    Three-dimensional model;    Volume of fluid method;    Water permeation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042164/pdf
DOI  :  10.1088/1755-1315/267/4/042164

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Water-assisted co-injection molding (WACIM) is a complex and creative injection molding process. A three-dimensional model for WACIM was setup and a k - ω turbulence model was adopted to deal with the turbulent flow of the water. The volume of fluid (VOF) method was used to track the moving interfaces of the skin-inner melt and the inner melt-water. Numerical simulations for the filling stage of WACIM parts with four types of cross-sections were carried out with the computational fluid dynamics (CFD) method. Experiments were conducted to verify the simulation results. The results of the experiments were in agreement with those of the simulations. The cross-section shape of the cavity had a significant effect on the penetrating area of the inner melt, while the shape of the water permeation eventually becomes round. The penetration area of the water increased in the flow direction, and the residual wall thicknesses of the inner melt downstream was thinner than the melt upstream.