Material Drying
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ABS silver streak misjudged as venting
Problem Phenomenon
[Problem Phenomenon] ABS overall random silver streaks misjudged as a venting problem, still ineffective after opening vents
Cause Analysis
Hair-like silver streaks with overall random distribution are 90% moisture, different from the local trapped-air streaks of poor venting; misjudging the direction leads to worse and worse adjustment; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solution
Verify moisture content ≤0.02% first before discussing anything else; moisture-type silver streaks are cured by drying; distribution position is the key to judging the cause; after adjustment, continuously sample to verify the effect, resume mass production only after confirming stability
Key Takeaway
For ABS silver streaks look at distribution first, overall random means moisture; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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