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Dual feed progressive cavity pump extrusion system for functionally graded direct ink write 3D printing.

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Summary

This study details a new Direct Ink Write (DIW) 3D printing system for creating compositionally-graded components. The accessible design utilizes a standard Fused Filament Fabrication (FFF) printer, enhancing user customization.

Keywords:
Additive manufacturingArduinoDirect ink writeDual feed extrusionFunctionally gradedG-code processingProgressive cavity pump

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Area of Science:

  • Additive Manufacturing (AM)
  • Material Extrusion
  • 3D Printing

Background:

  • Fused Filament Fabrication (FFF) is a widely accessible AM method.
  • Direct Ink Write (DIW) 3D printing is typically lab-based, expensive, and uses custom software.
  • Existing multi-material DIW systems are highly customized.

Purpose of the Study:

  • To outline the construction and operation of an accessible DIW system.
  • To enable the printing of compositionally-graded components.
  • To integrate DIW capabilities with a standard FFF printer gantry.

Main Methods:

  • Utilized a dual-feed progressive cavity pump extruder with a dynamic mixer.
  • Integrated the extruder with a Prusa i3 MK3S+ FFF printer as the gantry system.
  • Demonstrated the extruder's capability to vary material composition during printing.

Main Results:

  • Successfully constructed a DIW system capable of producing compositionally-graded parts.
  • Showcased the dynamic mixer's ability to alter material composition in real-time.
  • Validated the use of an FFF printer as a gantry system for DIW.

Conclusions:

  • The developed DIW system offers improved user-specificity and ease of operation.
  • This approach makes advanced compositionally-graded printing more accessible.
  • The integration provides a flexible platform for tailored AM applications.