Typical Injection Molding Conditions English SI Metric
Temperatures
Rear Zone 380 – 420 °F 193 – 216 °C
Center Zone 390 – 430 °F 199 – 221 °C
Front Zone 400 – 440 °F 204 – 227 °C
Melt 375 – 450 °F 191 – 232 °C
Mold 90 – 150 °F 32 – 66 °C
Pressures
Injection 10000 – 15000 psi 69 – 103 MPa
Hold 5000 – 10000 psi 34 – 69 MPa
Back 50 – 100 psi 0.34 – 0.69 MPa
Speeds
Fill 1 – 2 in/sec 25 – 51 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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