Processing Machinery
5 مشاهدة
POM product stains and color contamination
ظاهرة المشكلة
Different-colored spots or cloud-like stains appear on the product surface; after replacing with completely new raw material, the stains disappear, confirming the presence of contamination.
تحليل الأسباب
Foreign matter or other resins are mixed into the hopper and barrel, and incompatible materials form color-contaminated spots; raw material soiled during storage and transportation also brings in contaminants.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
الحل
①Clean the hopper, barrel, and nozzle; ②keep raw material clean during storage and transportation; ③clean thoroughly when changing material; ④standardize regrind classification management.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
الخلاصة الأساسية
Stain problems point to material contamination; cleaning management and standardized material change are the fundamentals of prevention, and precision products should establish raw material protection and purge confirmation processes.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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