Extrusion & Post 10 조회수

Rough inner wall of PVA extruded pipe

문제 현상

Inner wall roughness of PVA extruded pipe Ra>10μm, affecting fluid conveying efficiency

원인 분석

Mandrel surface rough or worn; insufficient internal cooling causing inner wall melt not fully sized; PVA melt elasticity causing uneven extrusion swell of the inner wall

해결 방법

1) Polish mandrel to Ra<0.4μm; 2) Optimize internal cooling system, cooling water through the mandrel; 3) Reduce extrusion rate to reduce elastic recovery influence; 4) Add a small amount of low-elasticity resin to improve inner wall smoothness

핵심 요약

Rough pipe inner wall is caused by mandrel condition and insufficient cooling; polishing mandrel and internal cooling are key

PVA pipe rough inner wall mandrel polishing internal cooling melt elasticity

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Rough inner wall of PVA extruded pipe

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