Injection Molding
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PA6 '2079851475616104452 Mold Sticking
Fenómeno do problema
The product gripped the core, and demolding was difficult.
Análise das causas
High holding pressure, small draft angle, crystallization shrinkage gripping; poor cavity polishing also aggravates it; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; during troubleshooting, confirm item by item around key factors such as mold sticking and holding pressure to avoid misjudgment.
Solução
①Appropriately reduce holding pressure to reduce gripping force and frozen internal stress;②increase the demolding draft angle to reduce demolding resistance;③polish the cavity or die lip to reduce surface resistance and improve replication;④extend cooling time so that the product is fully set before demolding;⑤optimize the ejection system to ensure balanced ejection and dispersed stress.
Conclusão principal
PA6 mold sticking = 'gripping force': reduce pressure and temperature to reduce gripping, draft angle and polishing to reduce resistance; the demolding resistance of crystalline nylon must be managed with emphasis; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence.
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