Optimization of gating system for the inverter shell injection mold based on Moldflow

Taking the Inverter Shell as an example, Moldflow software was applied for numerical simulation of injection molding. Aiming the problem of flowing unbalance for the injection mold combination cavity, the optimization scheme of gating system was determined. The shunt channel sizes were improved based on the flow balance analysis and the gate sizes were improved based on DOE test. The improved geometric parameters were simulated and verified, the results show that the unbalance rate of filling time between cavities fell to 0.6%, the pressure unbalance value is less than 19MPa, the pressure curve at the injection position rise steadily, and the melt flow imbalance can be effectively improved.