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Injection Fill Time from Flow Rate

Estimate average fill duration from melt volume and volumetric flow at the same process reference point.

Example starting values are prefilled to demonstrate the calculation. Replace them with your measured, quoted, or job-specific inputs before relying on a result.

Inputs

Inputs

Range: at least 0.0 in^3

Enter the melt volume associated with the fill stage at the same reference location as flow rate. Choose in³ or cm³ below. Do not mix part volume with total shot volume unintentionally.

Defaults to in³. Conversion: 1 in³ = 16.387064 cm³.

Range: at least 0.0 in^3/s

Enter the average flow rate over the same fill interval and at the same machine location as shot volume. Choose in³/s or cm³/s.

Defaults to in³/s. Flow is normalized consistently with shot volume.

Result

Normalized flow rate (in^3/s)
3.00000
Estimated fill time (s)
4.000
Estimated fill time (min)
0.06667
Normalized shot volume (in^3)
12.00000
Model assumptions and limits
This result assumes a constant average flow over the specified fill volume and time. Actual screw velocity/flow profiles, decompression, compression, pressure limits, and the selected reference point can change observed fill time; compare with the press trace or validated process data.

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