Extrusion & Post
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PET drop breakage
Fenómeno del problema
PET beverage bottles break at the bottom in drop tests
Análisis de la causa
Drop impact concentrates at the bottom; areas with insufficient stretch orientation have low strength; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solución
Optimize the blowing stretch ratio to make the bottom fully oriented; bottle bottom reinforcing rib design; adjust preform body temperature distribution; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Drop strength is guaranteed by orientation design and bottle bottom structure; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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