Processing Machinery
6 visualizações
Rough and dull surface of PP-R pipes
Fenómeno do problema
The outer surface of PP-R pipes is rough, dull, and grainy, clearly different in appearance from qualified pipes.
Análise das causas
Low melt temperature causes poor plasticization and poor surface replication; poor raw material quality or an excessively high regrind ratio; contamination or wear of the screw and die causing uneven output—all manifest on the surface as roughness and dullness.
Solução
①Optimize and stabilize the temperature settings to ensure sufficient plasticization; ②use qualified PP-R resin and control the regrind ratio; ③regularly clean the screw, barrel, and die; ④check the die surface condition and polish it; ⑤stabilize the extrusion output to avoid pulsation.
Conclusão principal
For rough PP-R pipe surface, investigate in the order of 'temperature → raw material → equipment cleanliness': first ensure plasticization is in place, then check raw material and regrind, and finally clean the equipment; appearance problems are often a mirror of upstream plasticization and raw material quality.
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!