Extrusion & Post
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TPU extrusion surface roughness
Fenómeno do problema
The surface of TPU extruded profiles is rough with poor gloss.
Análise das causas
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
Solução
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
Conclusão principal
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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