Molds & Tooling
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PEEK Shrinkage Rate and Fiber Orientation Differences
Fenómeno do problema
[Problem Phenomenon] Virgin PEEK parts have large dimensional deviation, and warpage deformation occurs after switching to a carbon fiber grade
Análise das causas
Virgin PEEK has a shrinkage rate of 1.2-2.4% and is crystallinity-sensitive; CF/GF filled grades drop to 0.1-0.5% but fiber orientation introduces anisotropic warpage; mold compensation must be designed separately for each grade
Solução
Design mold compensation according to the measured directional shrinkage of each grade; optimize the gate of filled grades to homogenize fiber orientation; lock crystallinity through mold temperature to reduce batch dimensional drift; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PEEK shrinkage is designed in separate tracks by grade, and warpage of filled material relies on the gate to homogenize orientation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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