Injection Molding
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PA66 glass fiber floating fiber surface
Problem Phenomenon
Glass fiber reinforced product surface has floating fibers and is rough, and surface improvement is limited after high-speed injection
Cause Analysis
The fluidity difference between glass fiber and PA66 makes fibers enrich at the surface layer; increasing injection speed can narrow the velocity difference between glass fiber and matrix and improve the surface, but the effect is limited when mold temperature is low
Solution
①Raise mold temperature to improve surface replication; ②Appropriately increase injection speed to narrow the velocity difference; ③For appearance parts, evaluate surface texture or mineral-filled substitution; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Key Takeaway
Floating fiber treatment requires both process and material routes in parallel; high mold temperature plus velocity matching is the main line, and demanding appearance parts are more thoroughly solved from the formulation end; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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