Meaning
Computer-aided engineering software for the plastics industry simulates the injection moulding process to optimize part design and mould configuration. By utilizing moldex3d, manufacturers can visualize the flow front, pressure distribution, and thermal profile within the cavity before machining metal tool inserts. This simulation helps avoid costly trials and modification cycles by predicting how molten polymer behaves inside the channels.
Simulation Mechanism
Numerical solvers calculate the conservation of mass, momentum, and energy using three-dimensional finite volume models of the runner and cavity. In moldex3d, these solvers incorporate the non-Newtonian viscosity of the polymer melt across varying shear rates and temperatures. This calculation allows the program to track the advance of the melt front through complex geometry and thin walls.
Defect Prediction
Virtual analysis identifies potential quality problems such as sink marks and air traps. Designers can use moldex3d to adjust the injection speed or hold pressure, verifying that the chosen settings will prevent cosmetic and structural defects. This feature is particularly helpful when working with filled materials where fibre orientation affects warpage and shrinkage.
Tooling Design
Toolmakers configure cooling channel layouts and gate placements based on the simulated thermal distribution and shear heating calculations. The outputs from a moldex3d simulation guide the design of conformal cooling lines that match the contours of the part, ensuring uniform temperature reduction. When the simulation predicts high residual stress, the designer can reposition the gates to achieve balanced filling and prevent the final part from warping after ejection from the tool.
This preemptive adjustment minimizes the need for steel-safe modifications on the physical mould, reducing the time required to bring a new product to market.
