Extrusion & Post 14 visualizações

PP Pipe Extrusion Inner Wall Ripples

Fenómeno do problema

Ripple-like undulations appear on the inner wall of PP-R pipes.

Análise das causas

Uneven melt distribution between die and mandrel or pressure fluctuation; improper sizing sleeve cooling also causes inner wall defects.

Solução

①Check die head flow channels and spider; ②stabilize extrusion pressure; ③optimize sizing cooling; ④low-shear die head design to prevent degradation.

Conclusão principal

For inner wall ripples, check die head distribution and pressure stability.

PP-R;pipe;inner wall ripple;die head;sizing

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