Multi-Jet Fusion (MJF)

What is Multi Jet Fusion?

Multi Jet Fusion is a form of 3D printing which involves a very thin layer of fine Nylon powder which is soaked in a special chemical that helps it melt and fuse together. Agents are deposited on the bed of nylon powder and then heated up by a heat lamp. The molten nylon layer is lowered and the process repeats. The layers' polymer chains intertwine and fuse together creating a solid and isotropic part. MJF is a fairly new form of additive manufacturing which is still limited to industrial level applications.

Why would I use this process to create a 3D part?

In general, MJF allows for incredibly complex geometries to be created without any support in engineering grade materials. Additionally due to the high volume nature of these machines many of the parts cost less than other industrial processes.

Benefits of MJF over other processes:

  • Fully dense or shelled out parts

  • No support material

  • Lower relative costs to other industrial additive manufacturing

  • Complex geometries

  • High repeatability

  • Isotropic material properties

Drawbacks of MJF over other processes:

  • Noticeable startup costs compared to consumer grade 3D printing

  • Longer lead times due to post-processing

  • Must have a certain part density to print

HP Jet Fusion 580