Simulations of gas penetration in thin plates designed with a semicircular gas channel during gas-assisted injection molding

1996 ◽  
Vol 38 (3) ◽  
pp. 335-348 ◽  
Author(s):  
Shia Chung Chen ◽  
Nien Tien Cheng ◽  
Ke Sheng Hsu
Keyword(s):  
Injection Molding ◽  
Thin Plates ◽  
Gas Channel ◽  
Gas Penetration

Surface Model Based Modeling and Simulation of Filling Process in Gas-Assisted Injection Molding

2009 ◽  
Vol 131 (1) ◽  
Author(s):  
Jianhui Li ◽  
Lei Chen ◽  
Huamin Zhou ◽  
Dequn Li
Keyword(s):  
Injection Molding ◽  
Hybrid Control ◽  
Control Volume ◽  
Computing Time ◽  
Three Dimensional ◽  
Expansion Method ◽  
Surface Model ◽  
Gas Channel ◽  
Model Based ◽  
Gas Penetration

Present gas-assisted injection molding simulations are all based on either a midplane model or a 3D model, in which second modeling is unavoidable for a midplane model, and a 3D simulation needs a full-scale three-dimensional discretization of parts leading to unsustainable computing time and unstable numerical analysis. In this paper, surface model based modeling and numerical simulation of gas-assisted injection molding are proposed. By taking the influence of gas penetration on melt flow as boundary conditions of the melt-filling region, a hybrid control-volume finite element/finite-difference method (CV/FEM/FDM) similar to conventional injection molding simulation is employed. The gas penetration interface within the gas channel is solved by applying the matching asymptotic expansion method, which educes an analytical model of the gas penetration thickness ratio. A technology of generating gas-channel mesh semiautomatically is put forward, which combines selecting the path of gas channel manually and calculating the parameters of gas nodes automatically. The second modeling is thus avoided. The proposed model and simulation are verified by comparing with the experiment.

The role of gas penetration on morphological formation of polycarbonate/polyethylene blend molded by gas-assisted injection molding

2007 ◽  
Vol 42 (17) ◽  
pp. 7275-7285 ◽  
Author(s):  
Guo-Qiang Zheng ◽  
Wei Yang ◽  
Li Huang ◽  
Zhong-Ming Li ◽  
Ming-Bo Yang ◽  
...  
Keyword(s):  
Injection Molding ◽  
Polyethylene Blend ◽  
Gas Penetration

Gas-assisted powder injection molding: A study on the effect of processing variables on gas penetration

2010 ◽  
Vol 200 (3) ◽  
pp. 128-135 ◽  
Author(s):  
Kyehwan Lee ◽  
Manuel de Hoyos ◽  
Seokyoung Ahn ◽  
Rajiv Nambiar ◽  
Miguel A. Gonzalez ◽  
...  
Keyword(s):  
Injection Molding ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Processing Variables ◽  
Gas Penetration

A Study of Integration of LIGA and M-EDM Technology on the Micro Injection Molding of Super Thin Plates with Micro Through Holes

2006 ◽  
Vol 21 (4) ◽  
pp. 340-347 ◽  
Author(s):  
S.-C. Tseng ◽  
Y.-C. Chen ◽  
C.-H. Lin ◽  
B.-Y. Shew ◽  
C.-L. Kuo
Keyword(s):  
Injection Molding ◽  
Thin Plates ◽  
Micro Injection Molding

scholarly journals The Effects of Processing Variables on Gas Penetration in Gas-Assisted Powder Injection Molding(GAPIM)

2012 ◽  
Vol 21 (2) ◽  
pp. 107-112
Author(s):  
D.H. Kim ◽  
H.P. Park ◽  
K.H. Lee ◽  
B.S. Cha ◽  
J.H. Choi ◽  
...  
Keyword(s):  
Injection Molding ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Processing Variables ◽  
Gas Penetration
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