Extrusion & Post
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TPU extrusion surface roughness
Fenómeno del problema
The surface of TPU extruded profiles is rough with poor gloss.
Análisis de la causa
Low melt temperature causes poor plasticization; low die temperature or buildup scrapes the surface; shear overheating also causes surface defects; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
①appropriately increase melt and die temperature; ②clean die buildup; ③optimize screw speed; ④check the die surface condition; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
TPU extrusion surface quality relies on temperature and die condition management; buildup cleaning is a routine maintenance item; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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