Injection Molding
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PBAT '2079851475616104452 warpage
Fenómeno del problema
PBAT injection molded products warp and deform, with uneven crystallization and internal stress acting together.
Análisis de la causa
PBAT crystallization rate is slow; uneven cooling causes shrinkage differences; improper holding pressure causes internal stress; uneven wall thickness; high demolding temperature.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
①Uniform control of mold temperature; ②optimize holding pressure curve; ③uniform wall thickness design; ④sufficient cooling time; ⑤annealing treatment.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Cooling uniformity is the core of PBAT warpage; holding pressure and structure are equally important; annealing is a post-treatment option.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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