12.5.7 Discolored Parts
The finished product varies in color on different surfaces.
Probable Cause:
1. Molding Machine
• Contamination
2. Mold
• Incorrect sprue diameter
• Inadequate venting
3. Material
• Physical contamination of raw material
• Chemical contamination of raw material
• Melt too hot / poor melt
• Incompatible color dye
• Residence time too high
Solution (in sequence):
1. Purge heating cylinder
2. Lower resin temperature by:
• reducing cylinder temperature
• reducing screw speed
• reducing back pressure
3. Decrease nozzle temperature
4. Adjust residence time
5. Adjust regrind ratio
6. Adjust cycle time
7. Check for external contamination sources
8. Ensure proper cooling in all areas
9. Increase mold venting
12-11
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TROUBLESHOOTING
FSG2 User Manual
Summary of Contents for Fusion G2
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