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This study demonstrates Multi Jet Fusion 3D printing of polyamide 12 for high-pressure water applications up to 10 MPa. It provides manufacturing guidelines and validates watertightness, offering an alternative to traditional methods.

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Fluid Dynamics

Background:

  • Traditional manufacturing methods face limitations in producing complex, high-pressure fluid handling components.
  • Porosity in additive manufacturing often leads to leakage issues in functional parts.
  • Polyamide 12 is a suitable material for demanding applications, but its watertightness requires investigation.

Purpose of the Study:

  • To explore the watertightness of Multi Jet Fusion (MJF) printed polyamide 12 parts under high pressure.
  • To establish manufacturing rules for engineers developing pressurized components using MJF.
  • To demonstrate MJF as a viable alternative to traditional manufacturing for fluid handling systems.

Main Methods:

  • Investigating water leakage through varying printing orientations and wall thicknesses.
  • Testing parts under a range of pressure values up to 10 MPa.
  • Validating a 3D printed industrial ball valve against the ISO 9393 standard.

Main Results:

  • Identified optimal printing parameters for achieving watertightness in MJF polyamide 12 components.
  • Established manufacturing guidelines for reliable high-pressure fluid handling parts.
  • Successfully validated a 3D printed ball valve, meeting stringent tolerance and performance requirements.

Conclusions:

  • Multi Jet Fusion technology enables the production of watertight, high-performance fluid handling components from polyamide 12.
  • This research provides critical insights and rules for engineers to leverage additive manufacturing for pressurized applications.
  • The study overcomes porosity-related leakage challenges, paving the way for AM in critical fluid systems.