Processing Machinery
5 مشاهدة
PPO Foamed Part Cell Defects
ظاهرة المشكلة
[Problem Phenomenon] Coarse and uneven cells in PPO foamed products, surface collapse
تحليل الأسباب
Uneven foaming agent dispersion and melt temperature fluctuation make cells out of control; when the expansion ratio is too high, melt strength is insufficient and cells merge; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
الحل
Precisely meter the foaming agent masterbatch and disperse it evenly; control melt temperature within the foaming window; adjust the expansion ratio according to the density target; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
الخلاصة الأساسية
PPO foaming cells depend on dispersion and temperature, and the expansion ratio must not be greedily high; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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