Three-dimensional finite element solution of gas-assisted injection moulding

This paper presents a *nite element algorithm for solving gas-assisted injection moulding problems. The *lling material is considered incompressible and has temperature and shear rate dependent viscosity. The solution of the three-dimensional (3D)equations modelling the momentum, mass and energy conservation is coupled with two front-tracking equations, which are solved for the polymer=air and gas=polymer interfaces. The performances of the proposed procedure are quanti*ed by solving the gas-assisted injection problem on a thin plate with a ;ow channel. Solutions are shown for di