Molds & Tooling
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PP Glass Fiber Reinforced Warpage
Problem Phenomenon
GF-PP flat parts warp along a fixed direction; uneven cooling adjustments are ineffective.
Cause Analysis
Glass fiber orientation causes flow-direction/transverse shrinkage differences; gate position determines orientation direction.
Solution
①Adjust gate position; ②Moldflow fiber orientation analysis; ③balance holding pressure; ④select low-warpage mineral/glass fiber hybrid filled grades.
Key Takeaway
Orientation warpage is broken through from gate design.
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