Molds & Tooling
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PEEK Compression Molding Temperature and Cooling Control
Problem Phenomenon
【Problem Phenomenon】PEEK compression molded parts warp and deform or are under-crystallized, with performance scattered between batches
Cause Analysis
Compression molding requires full melting at 390-400℃ and holding for 15 minutes per 25mm wall thickness; the cooling rate is about 40℃/h, cooling under pressure to below 150℃ before demolding; if the rate is out of control, warpage or uneven crystallization occurs
Solution
Hold according to the 390-400℃ melting temperature and wall thickness ratio; use a thermocouple to monitor the 40℃/h cooling rate; cool under pressure to below 150℃ before demolding
Key Takeaway
The success of compression molding lies in melt holding and controlled cooling; the rate must be actually measured by thermocouple; 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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