Extrusion & Post
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PA6 Glass Fiber Floating Fiber Surface
Problem Phenomenon
Glass fiber reinforced product surfaces are rough with floating fibers, fiber texture appears after painting, and appearance part complaints occur
Cause Analysis
The flowability difference between glass fiber and PA6 melt causes fibers to enrich and expose at the cavity surface layer; low mold temperature and high injection speed aggravate surface floating fibers, worsening surface gloss and coating quality
Solution
①Raise mold temperature to 90-100°C to improve surface replication; ②Reduce injection speed to reduce jetting; ③Avoid the gate directly facing the cavity surface, and use surface texture masking if necessary
Key Takeaway
Floating fiber is a classic appearance problem of glass fiber PA6; high mold temperature plus low-speed filling is the main process line, and structural design masking is an auxiliary means; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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