Material Drying
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PA6 Product Corner Chipping
Problem Phenomenon
Corner chipping and edge breaking during demolding or use.
Cause Analysis
Stress concentration at sharp corners + dry-state brittleness; fracture along sharp corners under ejection or external force; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Change sharp corners to rounded transitions to eliminate stress concentration;②perform conditioning treatment before assembly to restore toughness and stabilize dimensions;③increase ejection area and reduce holding pressure to disperse and reduce ejection force;④structurally strengthen weak locations (rounded corners, reinforcing ribs);⑤slow down ejection speed to reduce ejection impact.
Key Takeaway
PA6 corner chipping = 'sharp corners + dry-state brittleness': rounded corners and conditioning work together; nylon is brittle in dry state, and sharp corners are the starting point of fracture; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence.
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