Injection Molding
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LDPE '2079851475616104452 Warpage
Problembeschreibung
LDPE injection molded parts warp and deform, and the assembly dimensional chain exceeds tolerance
Ursachenanalyse
LDPE has large shrinkage and warps when cooling is uneven; wall thickness differences and molecular orientation aggravate deformation; uneven cooling rate is the most common cause; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
① Wall thickness uniformity design; ② balanced arrangement of cooling water channels; ③ optimize the holding pressure curve for density distribution; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
LDPE warpage treatment is the same as HDPE; uniform wall thickness plus balanced cooling is the basic engineering; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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