Molds & Tooling
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PPO Glass Fiber Grade Warpage
Problem Phenomenon
[Problem Phenomenon] Warpage of glass fiber reinforced PPO products, poor dimensional assembly
Cause Analysis
Fiber orientation makes shrinkage anisotropic, and gate position determines the orientation distribution; uneven cooling superimposed with orientation differences causes warpage; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Optimize gate position to homogenize fiber orientation; uniform mold temperature; use low-warpage grades (HS2000, etc.) for warpage-sensitive parts; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The root of PPO glass fiber warpage is orientation, and gate design is the first adjustment means; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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