Material Drying
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PCABS hopper heat preservation 80℃
Problem Phenomenon
【Problem Phenomenon】Qualified dried PC/ABS regains moisture in the hopper, silver streaks recur in afternoon parts
Cause Analysis
Dried material in an open hopper regains moisture beyond the standard in 2-3 hours; a heat-preservation hopper maintaining 80℃ can delay moisture regain and is a necessary configuration for continuous production; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
Hopper heat preservation at 80℃ with cover; batch feeding to control residence ≤2h; direct connection of hopper dryer in humid seasons; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PC/ABS hopper heat preservation 80℃, 2 hours residence is the moisture regain warning line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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