The upcoming release (R14) of Moldex3D simulation software includes a new tool for speeding up the tricky task of balancing hot runners in a multi-cavity tool. The new Hot Runner Steady (HRS) Analysis performs a quick calculation based on the runner layout, without including the cavities, and predicts the flow rate at each gate. The purpose is to identify potential balance problems for further refinement, but the HRS analysis is said to provide accurate results very close to those determined by a more time-consuming and detailed Advanced Hot Runner filling analysis. For example, HRS Analysis analyzed a 16-drop hot-runner system in 4 min, vs. up to 1 hr with Advanced Hot Runner filling analysis, and the pressure-drop predictions (around 17 MPa, or 2465 psi) by the two programs were within 1 MPA/145 psi) of each other. Thus HRS analysis can be up to 15 times faster.
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