Extrusion & Post
13 مشاهدة
POM Delamination and Peeling
ظاهرة المشكلة
The part surface layer delaminates and peels; peel test shows poor interlayer bonding and unqualified strength
تحليل الأسباب
Delamination is mostly due to contamination mixing in or excessive shear from too-small gates; cold material entering the cavity also forms delamination interfaces; POM mixed with even trace amounts of other polymers becomes incompatible and delaminates
الحل
①Check virgin material and regrind for contamination; ②enlarge the gate and provide sufficient cold slug wells; ③after barrel cleaning, verify whether delamination is eliminated; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
الخلاصة الأساسية
Contamination is the number one suspect in POM delamination; gate and cold slug well are the second check, and cleaning verification closes the loop; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!