Multi Jet Fusion (MJF)

Multi Jet Fusion is an industrial 3D printing process that produces functional nylon prototypes and end-use production parts in as fast as 1 day. Final parts exhibit quality surface finishes, fine feature resolution, and ‬more consistent mechanical properties when compared to processes like selective laser sintering.

How Does Multi Jet Fusion Work?

Multi Jet Fusion uses an inkjet array to selectively apply fusing and detailing agents across a bed of nylon powder, which are then fused by heating elements into a solid layer. After each layer, powder is distributed on top of the bed and the process repeats until the part is complete.

When the build finishes, the entire powder bed with the encapsulated parts is moved to a processing station where a majority of the loose powder is removed by an integrated vacuum. Parts are then bead blasted to remove any of the remaining residual powder before ultimately reaching the finishing department where they are dyed black to improve cosmetic appearance.

  • Shipped in as fast as 1 day
  • AS9100 certified
Common Applications
  • parts requiring consistent isotropic mechanical properties
  • functional prototypes and end-use parts
  • complex and organic geometries with fine features



Design Guidelines for Multi Jet Fusion

Our basic guidelines for Multi Jet Fusion include important design considerations to help improve part manufacturability, enhance cosmetic appearance, and reduce overall production time. ​










MJF Material Options

PA 12 Black

PA 12 Black is a high tensile strength nylon. Final parts are dyed black, and they exhibit quality surface finishes and slightly more isotropic mechanical properties when compared to SLS. When more detail is required, PA 12 can achieve smaller minimum feature resolution (0.02 in) as compared to SLS materials (0.03 in). PA 12 Black is the best material option for designs that incorporate living hinges.

Primary Benefits​

  • Near isotropic mechanical properties
  • Economical material choice

 

PA 12 40% Glass-Filled Black

PA 12 40% Glass-Filled Black is a 40% glass-filled nylon. Final parts are dyed black. The biggest advantage offered by this material is heat deflection at 347°F (measured at 66 psi), ranking 2nd best after PA 12 Mineral-Filled.

Primary Benefits​

  • Economical material choice
  • Heat deflection  

Compare MJF Material Properties

Material Color Tensile Strength Tensile Modulus Elongation
PA 12 Black Black 7.1 ksi 276 ksi 8.5%
PA 12 40% Glass-Filled Black Black 4.35 ksi 508 ksi 8.5%
Material Color Tensile Strength Tensile Modulus Elongation
PA 12 Black Black 49 Mpa 1,900 Mpa 8.5%
PA 12 40% Glass-Filled Black Black 30 Mpa 3,500 Mpa 8.5%

These figures are approximate and dependent on a number of factors, including but not limited to, machine and process parameters. The information provided is therefore not binding and not deemed to be certified. When performance is critical, also consider independent lab testing of additive materials or final parts.


Our MJF 3D Printers

We use HP Jet Fusion 3D 4210 machines that are capable of accelerated build speeds when compared to other powder-based additive manufacturing technology. The HP 3D printers produce commercial-grade parts with enhanced surface finishes and improved mechanical properties compared to other 3D printing technology.


Resources

a metal 3D printing technician removes support structures from a DMLS part

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