Patent ID: 8868389

Claim:
A computer-implemented simulation method for use in molding process by a computer processor, comprising: specifying a simulating domain having a mold cavity configured to connect a tube of a molding machine, the tube and the mold cavity being two individual parts; creating a mesh by dividing at least part of the simulating domain; generating at least one flow parameter of a molding material in the tube, the at least one flow parameter comprising a filling rate of the molding material, wherein the step of generating at least one flow parameter of a molding material in the tube being performed by taking into consideration a dynamic movement of a pusher in the tube, a volume variation of the molding material in the tube, or the combination thereof; the dynamic movement of the pusher is a moving speed of the pusher in the tube with respect to an injection time or a position of the pusher in the tube with respect to the injection time; and an amount of the molding material injected into the mold cavity by the pusher in tube of the molding machine being governed by an equation of mass conservation expression shown below: ∫ρ·dV| t=t 1 =∫ρ·dV| t=t 1 +Δt +∫ t 1 t 1 +Δt ρ·FR·dt, wherein t 1 and t 1 +Δt are different injection times, FR represents the filling rate of the molding material, ρ represents density of the molding material, V represents volume of the molding material, dt represents an increment of time, dV represents an increment of volume, and the equation of mass conservation expression in an algebraic form being: ρ t ·V t =ρ t+dt ·(V t+dt +FR t+dt ·dt), wherein ρ t and ρ t+dt represent densities (inverse of specific volumes) of the molding material at the different injection times, V t and V t+dt represent volumes of the molding material at the different injection times, dt represents an increment of time, and FR t+dt represents a filling rate of the molding material; specifying boundary conditions of the mesh by taking into consideration the at least one flow parameter of the molding material, the boundary conditions comprising a flow velocity of the molding material that is injected into the mold cavity from the tube of the injection machine; and simulating a molding process of the molding material that is injected into the mold cavity by using the boundary conditions to generate a plurality of molding conditions.