Molds & Tooling
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Parting line wear from flash of PP products
Fenómeno del problema
Parting line flash gradually worsens with production.
Análisis de la causa
Parting line wear or platen deformation makes the fit loose; PP has good flowability, and tiny gaps are squeezed into by the high-pressure melt.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
①Grind and repair the parting line; ②check the clamping force; ③check the platen parallelism; ④optimize the injection pressure curve.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Conclusión clave
Progressive flash indicates mold wear; repair the mold in time to avoid batch defects.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for investigating similar problems in the future
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