Molding Process
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PEEK Cooling Time Far Exceeds Conventional Plastics
Problem Phenomenon
[Problem Phenomenon] PEEK parts whose cooling time is set following ABS experience deform at ejection and have unstable dimensions
Cause Analysis
3mm-wall PEEK needs 60-90 seconds of controlled cooling while ABS only needs 25-35 seconds, because the latent heat released during crystallization must be fully conducted away; insufficient cooling causes ejection deformation and post-crystallization dimensional drift
Solution
Set the cooling time according to wall thickness and crystallization needs — start at 60-90 seconds for 3mm walls; include crystallization latent heat in the cooling design; do not optimize the cycle at the cost of crystallization completeness
Key Takeaway
PEEK cooling involves crystallization latent heat — doubling the time is normal, do not forcibly compress the cycle; after confirming effectiveness, solidify 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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