Extrusion & Post
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Glass Fibre extrusion rough surface
Problem Phenomenon
Glass Fibre extruded product surface roughness Ra>5μm, exceeding requirement
Cause Analysis
Extrusion temperature too low <160°C, melt flow unstable; die inner wall rough or damaged; Glass Fibre melt elasticity, extrusion swell uneven
Solution
1) Raise extrusion temperature to 160-220°C; 2) polish die inner wall Ra<0.4μm; 3) reduce extrusion rate 10-15%; 4) add 0.3-0.5wt% external lubricant
Key Takeaway
Rough surface is caused by low-temperature extrusion and die defects; raising temperature and polishing die are core countermeasures
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