Molds & Tooling
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Fiber orientation causing severe anisotropy
Problem Phenomenon
The longitudinal and transverse shrinkage rates and strength differences of the product exceed 50%, and dimensions are unstable
Cause Analysis
Long fibers are highly oriented along the flow direction during filling; a single gate position causes unidirectional flow orientation; holding pressure further strengthens fiber orientation
Solution
Optimize the gate layout to achieve multi-directional filling; reduce holding pressure to reduce secondary orientation; consider in product design that the orientation direction is consistent with the main load-bearing direction
Key Takeaway
Uniform fiber orientation control is the key to reducing anisotropy
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