Material Drying
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PA6 Automotive Door Handle
Problem Phenomenon
The outer door handle cracks under force at low winter temperatures, and the surface chalks after summer sun exposure
Cause Analysis
The door handle is subject to the dual working conditions of opening-closing impact and outdoor aging, and dry-state low-temperature brittleness and UV aging together cause failure; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Select toughened UV-resistant grades, verified by notched impact at -30°C low temperature; condition before assembly; coat the outer surface or select a weather-resistant co-extruded layer design; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Outer door handle material selection must simultaneously meet low-temperature toughness and weather aging resistance requirements; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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