Material Drying
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ABS bubble
Problem Phenomenon
[Problem Phenomenon] ABS product internal bubbles, strength affected
Cause Analysis
Three types: moisture vaporization, degradation gas generation, thick-wall shrinkage void; locate by distribution classification; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry materials and should be confirmed first during troubleshooting
Solution
Moisture type strengthen drying; degradation type lower temperature and shorten residence; shrinkage void type strengthen holding pressure; after adjustment, continuously sample to verify the effect, resume mass production only after confirming stability; change only one variable each time and record parameter changes to facilitate locating effective measures
Key Takeaway
ABS bubbles are divided into three types, distribution points to the cause; 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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