Injection Molding
4 views
PA6 Flash
Problem Phenomenon
Thin-sheet flash at the parting line and ejector pins.
Cause Analysis
PA6 melt has low viscosity and easily penetrates into fitting clearances under high pressure; high injection pressure, insufficient clamping, and mold wear.
Solution
①Reduce injection/holding pressure;②calculate the clamping force;③repair the parting line and ejector pin clearances;④appropriately lower the material temperature to increase viscosity.
Key Takeaway
Low-viscosity nylon flash = a war between pressure and clearance.
Was this helpful?
0 people found this helpful
Thank you for your feedback!