Injection Molding worked example

Resin Dryer Capacity with total resin consumption across all presses of 45 kg/hr: a worked example

This scenario runs the resin dryer capacity calculation on the strong side: total resin consumption across all presses of 45 kg/hr, with every other input held at its documented default. Use this when selecting a dryer for a new press, checking if an existing dryer can handle increased throughput, or troubleshooting moisture-related defects from underdrying.

The inputs for this scenario

  • Total resin consumption across all presses: 45 kg/hr (raised for this scenario; the documented default is 18)
  • Dryer rated drying capacity: 25 kg/hr (unchanged)
  • Ambient/dew-point derating factor: 0.9 x (unchanged)

Working through the calculation

  • Applying the documented formula (Effective dryer capacity = Rated capacity x Derating factor) to the inputs above produces each figure below.
  • At this operating point the engine returns 10.13 kg/hr for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,125 kg/hr for gross capacity.
  • At this operating point the engine returns 1,115 kg/hr for uptime loss.
  • At this operating point the engine returns 0 kg/hr for yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where total resin consumption across all presses sits at 18 kg/hr and the headline result is 4.05 kg/hr, this scenario comes in 150% above the baseline at 10.13 kg/hr.
  • Use it when adding presses, qualifying a hot-and-humid summer setpoint, or specifying a central dryer for a new cell or plant. 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

  • Good output capacity: 10.13 kg/hr (headline result)
  • Gross capacity: 1,125 kg/hr
  • Uptime loss: 1,115 kg/hr
  • Yield loss: 0 kg/hr

Run it with your numbers

  • Every input above is editable in the live Resin Dryer Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.