Molding system for preparing injuection-molded article

A molding system for preparing an injection-molded article, comprising:

• a molding machine, including a barrel, a screw mounted for moving within the barrel, a driving motor driving the screw to move a molding resin;
• a mold disposed on the molding machine and connected to the barrel of the molding machine to receive the molding resin, and having a mold cavity with a die swell structure for being filled with the molding resin;
• a processing module simulating a filling process of the molding resin from the barrel into the molding cavity based on a molding condition including a predetermined screw speed for the molding machine, wherein simulating the filling process of the molding resin comprises simulating a die swell effect of the molding resin in the die swell structure by taking into consideration of an effective factor, a shear viscosity, an extension viscosity and a shear rate of the molding resin;
• and
• a controller operably communicating with the processing module to receive the molding conditions and with the molding machine to control the driving motor of the molding machine based on the molding conditions to move the screw at the predetermined screw speed to transfer the molding resin at a corresponding flow rate to perform an actual molding process for preparing the injection-molded article;
• wherein the processing module performs a model to simulate the die swell effect of the molding resin, and the model is represented by an expression:
• Wi
• ⁡
• (
• γ
• .
• )
• γ
• .
• ⁢
• τ
• *
• ∇
• +
• τ
• =
• 2
• ⁢
• η
• W
• ⁡
• (
• γ
• .
• )
• ⁢
• D
• where τ represents a stress distribution, τ∇* represents a rate of change of the stress distribution, Wi({dot over (γ)}) represents an viscoelastic property of the molding resin, ηW({dot over (γ)}) represents the weighted viscosity distribution of the molding resin, D represents a rate of deformation of the molding resin, and {dot over (γ)} represents the shear rate of the molding resin.