Material Drying
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PET crystallization-drying integration
Problembeschreibung
Amorphous PET chips are fed directly into the drying tower, agglomerate, block the material, and stop production
Ursachenanalyse
Amorphous chips soften and stick in the high-temperature drying tower, and must be crystallized first to raise the softening point before drying; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
Use a crystallization-drying integrated machine or pre-crystallize first through a crystallizer; raise the temperature for drying only after the crystallinity reaches the standard; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
Crystallizing amorphous PET before drying is an iron rule; after confirming effectiveness, solidify 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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