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Abstract: Based on the generalized Hele-Shaw, the mathematic model of
cavity filling in gas-assisted injection molding(GAIM), boundary
condition of gas penetration, key technology of CAD/CAE model, and the
system programming method are set up by providing reasonably accurate
assumptions. This numerical simulation on gas penetration, pressure
field, displacement process of melt-gas boundary in different time, and
skin melt forming on the cavity wall is developed for GAIM parts.
Research results show that increasing gas injection pressure or
decreasing melt temperature and Non-Newtonian index makes the thickness
ratio increase. These results are close to experimental values by other
investigators and consistent with actual GAIM process.
Key words: Gas-assisted injection Molding Numerical simulation
Gas penetration
CLC No: TG241
江西省科委科技攻关(JZ2001-22)和上海市科学技术发展基金“十五”科技攻关(015111004)资助项目.
Received 20020116, received in revised form 20020530
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