Extrusion & Post
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Internal stress cracking of products
Fenómeno del problema
Stress cracking appears in products during storage and use
Análisis de la causa
Cooling is too fast, orientation is large, wall thickness is uneven, and no annealing treatment is performed
Solución
Mold temperature 100-120C, annealing 140-150C 2-4h
Conclusión clave
Annealing is the key step to eliminate internal stress
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