| Possible Cause |
Possible Solution |
| Material has trapped moisture |
Pre-dry material according to instructions. Make sure mold
is vented properly. |
| Melt temperature is too high. |
Reduce barrel beating to prevent
decomposition.
Reduce screw RPM to stop excessive
shear heating. |
| Cold mold causes moisture to condesnse |
Increase mold temperature;
make sure cavity is dry. |
