Extrusion & Post
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Glass Fibre extruded pipe rough inner wall
Problem Phenomenon
Glass Fibre extruded pipe inner wall roughness Ra>10μm, affecting fluid transport efficiency
Cause Analysis
Mandrel surface rough or worn; insufficient internal cooling causes inner wall melt not fully set; Glass Fibre melt elasticity causes uneven extrusion swell of inner wall
Solution
1) Polish mandrel to Ra<0.4μm; 2) optimize internal cooling system, cooling water through mandrel; 3) reduce extrusion rate to reduce elastic recovery influence; 4) add small amount of low-elasticity resin to improve inner wall smoothness
Key Takeaway
Pipe inner wall roughness is caused by mandrel condition and insufficient cooling; polishing mandrel and internal cooling are key
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