Injection Molding
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PPO Glass Fiber Grade Floating Fiber
Problem Phenomenon
[Problem Phenomenon] Exposed fibers and rough surface on PPO+40% glass fiber products
Cause Analysis
When glass fiber content is high, fibers are enriched on the surface with melt flow; low melt and mold temperatures and slow injection speed aggravate floating fiber; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Raise melt and mold temperatures to improve fiber encapsulation; increase injection speed to embed fibers; optimize gates to reduce orientation concentration; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Floating fiber of PPO high-fiber grades is suppressed by temperature and injection speed, with gates cooperating for homogenization; 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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