Mold-Masters Hot Runner - Parts Sticking to Core

20.6.13 Parts Sticking to Core
The nished product does not properly release from the mold (male side).
Probable Cause:
1. Molding Machine
• High injection pressure
2. Mold
• Hot core
• Bending of core
• Presence of vacuum
3. Material
• Generally not a material related issue
Solution (in sequence):
1. Conrm cycle time for cooling
2. Reduce injection pressure
3. Reduce injection hold time
4. Reduce injection time
5. Adjust feed
6. Reduce mold closed time
7. Increase core temperature
8. Decrease nozzle temperature
9. Inspect mold for undercuts and / or improper draft
10. Verify mold bending ratio
20-17TROUBLESHOOTING
Hot Runner User Manual
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