20.6.11 Rough Surface
The nished product exhibits patterns on the surface similar to grooves on
a record, due to rapid cooling of the melt as it nears mold surface, followed
over and over again by fresh melt.
Probable Cause:
1. Molding Machine
• Low injection speed
• Low injection pressure
2. Mold
• Cold mold
• Irregularities in mold surface, defective polishing
3. Material
• Cold melt
Solution (in sequence):
1. Increase injection speed
2. Increase injection pressure
3. Increase melt temperature
4. Increase mold temperature
5. Inspect mold surface
20-15TROUBLESHOOTING
Hot Runner User Manual
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
To Next Page
Loading...
