Molds & Tooling
1 views
PEEK Shrinkage Rate and Fiber Orientation Differences
Problem Phenomenon
[Problem Phenomenon] Virgin PEEK parts have large dimensional deviation, and warpage deformation occurs after switching to a carbon fiber grade
Cause Analysis
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
Solution
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
Key Takeaway
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
Was this helpful?
0 people found this helpful
Thank you for your feedback!