Extrusion & Post
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PA12 Carbon Fiber Filament Nozzle Wear
Problem Phenomenon
【Problem phenomenon】After printing carbon fiber reinforced PA12 filament for a period of time, the nozzle extrusion became thinner and under-extruded
Cause Analysis
Carbon fiber is strongly abrasive to brass nozzles, and extrusion goes out of control after the aperture is worn larger or deformed; carbon fiber filament needs to be paired with wear-resistant nozzles such as tungsten steel and the printing speed reduced; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Replace with tungsten steel or hardened steel nozzles for carbon fiber filament; reduce printing speed to 20-30mm/s to reduce wear; regularly check the wear state of the nozzle aperture; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Carbon fiber filament must be paired with wear-resistant nozzles; bring the speed down to protect quality and the nozzle; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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