Extrusion & Post
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Delamination and Peeling of PEEK Thin-Walled Parts
Problem Phenomenon
【Problem Phenomenon】PEEK thin-walled products delaminate and peel between layers, cracking along the layer plane when bent
Cause Analysis
Excessive shear in thin-walled areas causes the melt to undergo laminar separation; improper gate position and abrupt wall thickness changes aggravate shear concentration; the mechanical properties of delaminated parts are severely damaged; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Adjust the gate position to avoid thin-walled high-shear areas; optimize wall thickness transitions to reduce abrupt changes; reduce the shear rate through thin-walled areas; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Thin-wall delamination is a shear overload signal; gate relocation is more important than increasing speed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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