Molds & Tooling
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PA66 mold temperature 80-120℃
Problem Phenomenon
Uneven product crystallization, poor surface gloss, thin-walled parts dimensions drift over time
Cause Analysis
When mold temperature is below 40℃, PA66 thin-walled parts' crystallinity changes over time, dimensions become unstable; mold temperature around 80℃ gives uniform crystallization and stable physical properties; high mold temperature also reduces internal stress and improves dimensional stability
Solution
①Mold temperature conventionally 80℃, 80-120℃ for precision and thick-walled parts; ②thin-walled parts with mold temperature below 40℃ need annealing to stabilize dimensions; ③cavity temperature difference controlled within ±2℃
Key Takeaway
Mold temperature determines PA66 crystallinity and thus physical properties; 80℃ is the baseline, ±2℃ temperature difference control can reduce shrinkage fluctuation by 40%; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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