Multi Jet Fusion (MJF)
Design Processes
HP's powder-bed 3D printing process: fast, strong nylon parts with no support structures.
In practice
Multi Jet Fusion spreads a thin layer of nylon powder, jets a fusing agent where the part should be and a detailing agent at its edges, then passes heat across the bed so only the treated areas fuse. It builds full beds of parts at once with consistent mechanical properties and a fine grey finish, which makes it the go-to for functional prototypes and low-volume production.
Questions
What is Multi Jet Fusion (MJF)?
MJF is an industrial additive process that selectively fuses nylon powder using inkjetted agents and heat, producing dense, isotropic parts without supports.
Why do you use Multi Jet Fusion (MJF)?
Faster and more consistent than laser sintering, strong enough for end use, and cheap per part when the bed is full.
How do you use/apply Multi Jet Fusion (MJF)?
Design for powder — drainage holes for hollows, minimum wall thickness — nest parts to fill the build, print, then bead-blast and optionally dye.
When do you use Multi Jet Fusion (MJF)?
For functional prototypes, housings, brackets and production runs into the thousands where injection tooling is not yet justified.
Who uses Multi Jet Fusion (MJF)?
Product designers and engineers moving from prototype to small-batch manufacture.
