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Residence Time Calculation Guide

This document contains calculations of residence times for injection molding and extrusion processes. For injection molding, it provides specifications for screw diameter, dosing stroke, cushion, cycle time, and shot weight to calculate the number of shots in the barrel and residence time volume. For extrusion, it performs residence time calculations based on melt volume, flow rate, and material density, outputting the residence time in hours and minutes.

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Tamar Makhviladze
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522 views12 pages

Residence Time Calculation Guide

This document contains calculations of residence times for injection molding and extrusion processes. For injection molding, it provides specifications for screw diameter, dosing stroke, cushion, cycle time, and shot weight to calculate the number of shots in the barrel and residence time volume. For extrusion, it performs residence time calculations based on melt volume, flow rate, and material density, outputting the residence time in hours and minutes.

Uploaded by

Tamar Makhviladze
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Residence Time Calculation @ @

Screw diam Dozing stroke Cushion Cycle time Shot weight


(mm) (mm) (mm) (sec) (gr) Density
80 44 18 40 239 1
62 44 18 40 239 1

# shots in the Residence time Volume part Screw diam. Calc.


barrel (min) (gr.) (mm)
24,61538462 16,41025641 130,624 95,87652316
19,07692308 12,71794872 78,45604 95,87652316

Extrusion Residence Time Calculation


Input:
Melt volume
(m3) 700
Flow rate /
output (kg/h) 400
Density
material
at melt
temperature
(kg/m3) 180

Output:
residence
time (h) 315
residence
time (min) 18900
Extrusion Residence Time Calculation
Input:
Melt volume (m3) 0,003
Flow rate / output (kg/h) 12
Density material
at melt temperature (kg/m3) 1000

Output:
residence time (h) 0,25
residence time (min) 15

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