Injection Molding worked example

Mold Maintenance Interval with baseline pm interval of 37,500 shots: a worked example

Suppose baseline pm interval falls to 37,500 shots. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate the recommended preventive maintenance interval in shots based on mold complexity, resin abrasiveness, and quality targets.

The inputs for this scenario

  • Baseline PM interval (standard mold): 37,500 shots (the input this scenario stresses; the baseline uses 75,000)
  • Resin abrasiveness factor: 0.6 x (held at the documented default)
  • Quality criticality factor: 0.85 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: PM interval = Baseline shots x Resin factor x Quality factor.
  • Result works out to 19,125 shots at these inputs, and this is the headline figure for the scenario.
  • Baseline x Resin factor works out to 19,125 value at these inputs.
  • Multiplier works out to 1 x at these inputs.
  • Factor A x B works out to 22,500 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where baseline pm interval sits at 75,000 shots and the headline result is 38,250 shots, this scenario comes in 50% below the baseline at 19,125 shots.
  • It scales a baseline PM shot interval by a resin abrasiveness factor and a quality criticality factor to give the adjusted shot count for the next maintenance. 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

  • Result: 19,125 shots (headline result)
  • Baseline x Resin factor: 19,125 value
  • Multiplier: 1 x
  • Factor A x B: 22,500 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Mold Maintenance Interval calculator, set baseline pm interval to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.