Material Drying
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ABS hopper heat preservation to prevent moisture regain
Problem Phenomenon
[Problem phenomenon] Properly dried ABS regains moisture in the hopper, and product silver streaks reappear in the afternoon
Cause Analysis
Dried material exposed to workshop air reabsorbs moisture; staying over 2 hours may exceed the standard; heat-preserved hopper maintaining a dry environment is the guarantee for continuous production; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
Solution
Hopper heat preservation at 80°C with cover; batch feeding according to cycle; direct connection of hopper dryer in humid weather; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
ABS hopper heat preservation at 80°C; moisture regain is the main cause of afternoon silver streaks; 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 subsequent similar problems
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