Extrusion & Post
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PCL low melt strength stringing
Fenómeno do problema
PCL has low melt strength during extrusion or printing, severe stringing, and poor surface finish.
Análise das causas
PCL has low melt strength; stringing is prone to occur during high-speed extrusion; the melt stays in the nozzle too long and thermally degrades; bubbles and impurities are generated; printing accuracy decreases.
Solução
①Extrusion or printing speed control; ②Nozzle temperature management; ③Shortening of melt residence time; ④Retraction or wiping mechanism; ⑤'2079851475616104451.；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PCL stringing is a direct manifestation of low melt strength; speed and temperature management; mechanism assistance improves the surface.；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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