Composites, Fiberglass & Advanced Materials worked example

Resin Infusion Time at 18% setup, debulk and flow-front monitoring allowance: a worked example

Suppose setup, debulk and flow-front monitoring allowance falls to 18%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate infusion fill time for vacuum infusion, VARTM, or resin transfer molding.

The inputs for this scenario

  • Resin volume to infuse into the laminate: 145 gal (held at the documented default)
  • Stable resin flow rate during infusion: 32 gal / hr (held at the documented default)
  • Setup, debulk and flow-front monitoring allowance: 18 % (the input this scenario stresses; the baseline uses 25)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base resin infusion time = resin volume to infuse รท stable resin flow rate.
  • estimated resin infusion time works out to 5.35 hr at these inputs, and this is the headline figure for the scenario.
  • base resin infusion time works out to 4.53 hr at these inputs.
  • infusion setup and monitoring allowance works out to 18 % at these inputs.
  • stable resin flow rate works out to 32 gal / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where setup, debulk and flow-front monitoring allowance sits at 25% and the headline result is 5.66 hr, this scenario comes in 5.6% below the baseline at 5.35 hr.
  • It computes infusion duration by dividing resin volume by stable flow rate, then adds a percentage allowance for setup, debulk, and flow-front monitoring. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • estimated resin infusion time: 5.35 hr (headline result)
  • base resin infusion time: 4.53 hr
  • infusion setup and monitoring allowance: 18 %
  • stable resin flow rate: 32 gal / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Resin Infusion Time calculator, set setup, debulk and flow-front monitoring allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.