Pressure Drop
Short-shoot to the end of each section of the flow path and record peak pressure. The tool shows what each section costs you, and whether filling the part leaves anything for pack.
Cumulative pressure by section
Material
Melt °C
Mold °C
| NOZZLE (psi) | SPRUE (psi) | RUNNER (psi) | GATE (psi) | PART (psi) | |
|---|---|---|---|---|---|
Machine max (psi)
Intensification ratio
Enter the cumulative pressure to fill through at least two sections.
How to run this study
Find out where injection pressure is consumed along the flow path, so you know which section to change and whether the part leaves any pressure for pack. A section taking a disproportionate share is the one worth opening up.
Procedure
- 01Set injection velocity to the optimal value from the viscosity-curve study and leave it there for every reading — pressure drop is velocity-dependent.
- 02Disable pack/hold. Record peak injection pressure on an air shot: that is the nozzle figure.
- 03Fit the mold and short-shoot to the end of the sprue. Record peak pressure.
- 04Short-shoot to the end of the runner, then to the gate, then to a just-full part, recording peak pressure each time.
- 05Enter the five cumulative readings in flow order — the tool derives each section’s share.
- 06If your readings are hydraulic rather than plastic, enter the machine’s intensification ratio so the numbers convert.