Molds & Tooling
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PP Part Uneven Gloss
Problembeschreibung
Gloss differences between areas of the same part, corresponding to mold temperature distribution.
Ursachenanalyse
Uneven mold cooling causes different surface replication states in each area; PP crystallinity differences also manifest as gloss differences.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Lösung
①Balance cooling water circuits; ②measure cavity temperature distribution; ③unify mold temperature; ④repair water circuit blockages.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
Uneven gloss points to a mold temperature distribution problem; water circuit balancing modification can solve it once and for all.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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