Injection Molding Melt Residence Calculator
Melt Residence Time
Estimate the number of shots in the barrel and the resulting melt residence time based on screw diameter, dosing stroke, cushion, and cycle time.
Calculation formulas
Number of shots = (8 × screw diameter) / (dosing stroke − cushion)
Residence time = shots × (cycle time / 60)
Residence time = shots × (cycle time / 60)
Number of shots in barrel
—
shots
Melt residence time
—
min
Note: The calculation is an engineering estimate. Ensure that dosing stroke is greater than cushion; otherwise the effective shot stroke becomes zero or negative and the residence time cannot be calculated.
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