Injection Molding worked example

Resin Dryer Capacity with total resin consumption across all presses of 9 kg/hr: a worked example

This worked example runs the resin dryer capacity numbers for a tougher week than the baseline: total resin consumption across all presses of 9 kg/hr instead of the typical 18 kg/hr. Determine if your dryer can keep up with press consumption by comparing required drying rate to dryer output capacity.

The inputs for this scenario

  • Total resin consumption across all presses: 9 kg/hr (the input this scenario stresses; the baseline uses 18)
  • Dryer rated drying capacity: 25 kg/hr (held at the documented default)
  • Ambient/dew-point derating factor: 0.9 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Effective dryer capacity = Rated capacity x Derating factor.
  • Good output capacity works out to 2.03 kg/hr at these inputs, and this is the headline figure for the scenario.
  • Gross capacity works out to 225 kg/hr at these inputs.
  • Uptime loss works out to 223 kg/hr at these inputs.
  • Yield loss works out to 0 kg/hr at these inputs.

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 50% below the baseline at 2.03 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. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Good output capacity: 2.03 kg/hr (headline result)
  • Gross capacity: 225 kg/hr
  • Uptime loss: 223 kg/hr
  • Yield loss: 0 kg/hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Resin Dryer Capacity calculator, set total resin consumption across all presses to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.