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System Selection Guide
58
Nozzle Series Selection
19 Series Nozzle is best suited due to the required flow rate of 52.5 g/sec. and the ABS material fitting the
medium to difficult material category.
Working Example of a System Selection
Part Details
Description Fluorescent Light Base
Overall Size 700 x 150 x 40 mm
Wall thickness (t) 1.5mm
Part Volume (V) 220ml
Part Model - Fluorescent Light Base
Material
Type ABS
Grade Cycolac T-XS 30001
Flame retardant Yes
Specific Gravity (SG) 1.3
L/t for wall thickness 96
Material Category Medium - due to flame
retardant move up one
grade to difficult.
Hot Runner System Initial Estimates
Number of Nozzles (N) 4
L/t 87.5 with 4 Nozzles
To calculate the number and size of nozzles required to fill a part an initial estimate of the number of nozzles or injection
points must be made. A good starting point is to limit the flow length / part thickness (L/t) ratio to the
typical values for that type of material.
Refer table on page 12 - Typical Flow Length Ratios.
1
2
3
Hot Runner System Analysis Results
Injection Pressure 93.65MPa
Injection Time (T) 1.36
Total Flow Rate (F) (V*SG)/T=(220*1.3)/1.36=210g/s
Flow Rate per Nozzle (F/N)=210/4=52.5g/s
4
System Selection - Example
Summary of Contents for Hot Half System
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