Injection Molding worked example
Pack & Hold Time with gate freeze time estimate of 11 sec: a worked example
This scenario runs the pack & hold time calculation on the strong side: gate freeze time estimate of 11 sec, with every other input held at its documented default. Use this when setting initial pack/hold time for a new mold, optimizing cycle time by finding the minimum effective hold time, or troubleshooting sink marks and voids.
The inputs for this scenario
- Gate freeze time estimate: 11 sec (raised for this scenario; the documented default is 4.5)
- Hold time base factor: 1 sec/sec (unchanged)
- Safety extension factor: 1.1 x (unchanged)
Working through the calculation
- Applying the documented formula (Hold time = Gate freeze time x Base factor x Safety extension) to the inputs above produces each figure below.
- At this operating point the engine returns 12.1 sec for result, the number this scenario is built around.
- At this operating point the engine returns 12.1 value for gate freeze x base factor.
- At this operating point the engine returns 1 x for multiplier.
- At this operating point the engine returns 11 value for factor a x b.
How this compares with the baseline
- Against the tool's baseline example, where gate freeze time estimate sits at 4.5 sec and the headline result is 4.95 sec, this scenario comes in 144% above the baseline at 12.1 sec.
- Use it when setting initial hold time for a new mold, trimming cycle time by finding the minimum effective hold, or troubleshooting sink marks and voids near the gate. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.
Results at a glance
- Result: 12.1 sec (headline result)
- Gate freeze x Base factor: 12.1 value
- Multiplier: 1 x
- Factor A x B: 11 value
Run it with your numbers
- Every input above is editable in the live Pack & Hold Time calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.