TY  - EJOU
AU  - Li, Qiang  
AU  - Ouyang, Jie  
AU  - Li, Xuejuan  
AU  - Wu, Guorong  
AU  - Yang, Binxin  

TI  - Numerical Simulation of Gas-assisted Injection Molding Process for A Door Handle
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2011
VL  - 74
IS  - 3&4
SN  - 1526-1506

AB  - A unified mathematical model is proposed to predict the short shot, primary and secondary gas penetration phenomenon in gas-assisted injection molding (GAIM) process, where the Cross-WLF model and two-domain modified Tait equation are employed to simulate the melt viscosity and density in the whole process, respectively. The governing equations of two-phase flows including gas, air and polymer melt are solved using finite volume method with SIMPLEC technology. At first, two kinds of U-shaped gas channels are modeled, where the shape corner and generous corner cases are studied. At last, as a case study, the short shot, primary and secondary gas penetration processes of a door handle are simulated. The numerical results show that the mathematical model can successfully depict the race-tracking and corner effects, which are very helpful for the design of GAIM.
KW  - Gas-assisted
KW  -  injection molding
KW  -  finite volume method
KW  -  door handle

DO  - 10.3970/cmes.2011.074.247