ABS (Acrylontrile-Butadiene-Styrene) |
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Also Known As
|
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Typical Machine Settings: Subject To Polymer Grade |
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Nozzle |
Front |
Centre |
Rear |
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Barrel Temperature |
225 - 250oC |
225 - 250oC |
210 - 225oC |
195 - 205oC |
Melt Temperature |
230 - 260oC |
Must be measured with a pyrometer by taking an airshot through the injection machine nozzle. |
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Hot Runner Temperature |
235 - 260oC |
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Mould Temperature |
50 - 95oC |
Run at upper end of range for best surface finish. |
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Injection Rate |
Slow To Moderate |
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Specific Injection Pressure |
700 - 1400 Bar (10,000 - 20,000psi) |
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Screw Back Pressure |
3.5 Bar (50psi) |
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Screw Speed |
30 - 60 rpm |
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Processing Features |
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Structure |
Amorphous |
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Specific Gravity |
1.05 |
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Viscosity |
Medium |
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Shear Rate Susceptibility |
Medium |
Average gates can be used |
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Temperature Window |
Medium |
Needs fairly accurate & stable control |
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Residence Time |
Medium |
Aim for short residence time |
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Start-Up Precedure |
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Shut-Down Precedure |
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The machine and mould may be shut-down normally, without cleaning the ABS from either the barrel or the hot runner. |