Extrusion & Post
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PLA 3D Printing Rough Surface
Problem Phenomenon
PLA printed parts have rough surface layer lines, and the appearance and dimensional accuracy are not up to standard
Cause Analysis
FDM layer-by-layer deposition inherently has high surface roughness; layer height, nozzle diameter and printing speed jointly determine it; post-treatment (polishing, chemical vapor) can improve it; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
①Reduce layer height and optimize speed; ②Mechanical polishing or chemical vapor post-treatment; ③Evaluate other processes for high-precision parts; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The PLA printing surface is an inherent process attribute; parameter optimization plus post-treatment are the two improvement routes; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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