Injection Molding
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HDPE '2079851475616104452 cycle optimization
Fenómeno del problema
To shorten the cycle, the cooling time was reduced, and the deformation of the products after demolding increased
Análisis de la causa
HDPE cooling time accounts for the bulk of the cycle; when cooling is insufficient, the product ejection temperature is high and deformation occurs in the free shrinkage stage; cycle optimization cannot be at the expense of cooling
Solución
①Cooling time is calculated according to the thickest part of the product; ②cycle optimization is tapped from mold closing, mold opening and ejection time; ③when the deformation exceeds the tolerance, restore the cooling time first; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
The boundary of HDPE cycle optimization is sufficient cooling; tapping potential in other links is safer than compressing cooling; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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