[Article] Infiltration Condition and Mouldability Diagram in Resin Injection Moulding

This paper deals with the modelling of injection moulding processes taking into account the deformability of the preform and the polymerisation of the resin. The coupled flow– deformation problem in the infiltrated and dry region is formulated with the corresponding boundary conditions and with the proper evolution equations determining the motion of the boundaries. An approximated analytical discussion is performed to obtain some estimates on the infiltration velocity, helping in identifying a window of applicability in the parameters space (i.e., the mouldability diagram), which fits well with the numerical simulations. Mathematical subject classification —35K10, 35R35, 35L10 Key words—Injection moulding, deformable porous media, mouldability diagram.