Extrusion & Post
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ASA multi-layer co-extrusion cooling
Fenómeno del problema
[Problem phenomenon] ASA co-extruded sheet cooling improper, surface layer and core layer shrinkage difference causes warpage
Análisis de la causa
Co-extruded sheet layers have different material shrinkage and cooling rates, uneven cooling produces interlayer stress warpage; ASA surface layer is thin, temperature gradient management critical; during on-site investigation, verify item by item according to this mechanism, avoid blindly adjusting the machine based on experience alone
Solución
Cooling roll temperature gradient setting; each layer thickness ratio stable; traction tension uniform to prevent stretch orientation; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
ASA co-extrusion cooling looks at interlayer balance, roll temperature gradient is key; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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