Typical Injection Molding Conditions English SI Metric
Temperatures
Rear Zone 330 – 360 °F 166 – 182 °C
Center Zone 340 – 370 °F 171 – 188 °C
Front Zone 350 – 380 °F 177 – 193 °C
Melt 340 – 400 °F 171 – 204 °C
Mold 90 – 150 °F 32 – 66 °C
Pressures
Injection 7000 – 11000 psi 48 – 76 MPa
Hold 4000 – 9000 psi 28 – 62 MPa
Back 50 – 100 psi 0.34 – 0.69 MPa
Speeds
Fill 0.5 – 1 in/sec 13 – 25 mm/sec
Screw 60 – 90 rpm 60 – 90 rpm
Drying
Time & Temperature 2 Hrs @ 175 °F 2 Hrs @ 79 °C
Dew Point n/a °F n/a °C
Moisture Content 0.10 % 0.10 %
  • This information is intended to be used only as a guideline for designers and processors of modified thermoplastics for injection molding. Because injection mold design and processing is complex, a set solution will not solve all problems. Observation on a “trial and error” basis may be required to achieve desired results.
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