| Possible Cause |
Possible Solution |
| Excessive injection pressure causes mold to part. |
Verify the injection fill time. Decrease final injection speed.
Reduce back pressure
Move transfer point back
Increase clamp pressure. |
| Melt temperature is too high. |
Reduce nozzle temperature Reduce front barrel zone temperature
Reduce back pressure
Reduce screw RPM's.
Decrease mold temperature |
| Mold function is incorrect. |
Make sure mold faces are in correct alignment Remove foreign matter from
mold faces
Decrease size of vents
Decrease mold temperature.
Check platens for square. |
Mold release agent causing flash on part. |
Mold surface lubricant should not be used |
