Extrusion & Post
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Flow marks on PETG extruded sheet
Fenómeno del problema
Flow line marks along the extrusion direction appear on the sheet surface.
Análisis de la causa
The melt flow in the die head is uneven, the die head flow channel design has dead corners, and the extrusion temperature is uneven.
Solución
Optimize the die head flow channel design; balance the heating; increase the processing temperature to reduce the viscosity.
Conclusión clave
PETG sheet flow marks point to die head flow channel design problems.
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