Cavity Balance
Run a short shot, weigh each cavity, enter the weights. The tool reports how far out of balance the tool is filling and which cavities lead and lag.
Short-shot weights
Material
Melt °C
Mold °C
Fill %
Number of cavities
| Cavity | Shot 1 |
|---|---|
| 1 | |
| 2 | |
| 3 | |
| 4 |
Weigh every cavity on at least one shot to compute imbalance.
- Each column is one machine shot.
- Weigh every cavity on one shot to compare them.
- Add a second shot to separate cavity variation from shot-to-shot variation.
How to run this study
Measure how uniformly a multi-cavity mold fills by comparing part weights from each cavity on a short shot. This exposes cavity-to-cavity variation and tells you whether the runner or process needs attention.
Procedure
- 01Set injection velocity to the optimal value from the viscosity-curve study. Disable pack/hold.
- 02Label each cavity so parts trace back to where they came from.
- 03Reduce shot size / transfer position to a short shot around 95% fill.
- 04Mold 5 shots to stabilize, then collect one part from each cavity and weigh them.
- 05Enter the fill % and each cavity weight — the tool reports imbalance and which cavities lead and lag.
- 06For a fuller picture, repeat at several fill levels (e.g. 20/40/60/80/95%) and compare the trend.