Extrusion & Post
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PC/ABS delamination (contamination type)
Fenómeno do problema
Delamination appears after material change or adding regrind.
Análise das causas
Incompatible resin mixed in (such as PP mixed in), contaminated regrind, unclean mixing storage or conveying system; incompatible materials cannot fuse with the matrix.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solução
①Thoroughly clean hopper, barrel and hot runner; ②classify and manage regrind to prevent cross contamination; ③check cleanliness of material storage and conveying system; ④fully purge after material change.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Contamination-type delamination is prevented by material management; cleaning and classification are the institutional guarantee.; 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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