Problem:
Inconsistent melt.

Solution:

1. Barrel temperatures too low, particularly at rear zone.
2. Increase screw speed.
3. Increase back pressure.
4. Check for proper screw compression ratio.
5. Check for wear of the screw or barrel.
6. Check for proper screw flight depth.
7. Increase machine plasticising capacity—larger screw/barrel.

 ImtechDesign.com 

Moldflow Consulting