Processing Machinery
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PA12 SLS Interlayer Peeling
Problem Phenomenon
【Problem phenomenon】SLS printed PA12 parts had weak interlayer bonding and cracked along layers under stress
Cause Analysis
Insufficient temperature or too-fast scanning makes interlayer fusion inadequate; when the interlayer temperature gradient is large, the new layer cannot fully diffuse and bond with the solidified layer; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Increase preheating temperature and laser energy input; reduce scanning speed to extend melting time; optimize layer thickness and placement direction to reduce thermal stress; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Interlayer peeling is a signal of insufficient energy; raise temperature and reduce speed to promote interlayer fusion; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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