Multi-jet fusion
Powder-based 3D printing using fusing and detailing agents.
Multi-jet fusion (MJF) is a 3D printing technology developed by Hewlett-Packard (HP). It deposits powder in layers, sprays a fusing and detailing agent onto each layer, and bonds the material with heat. The process is suited for prototyping, small-scale production, and customized parts, and is marketed as having strength comparable to injection molding.
Quick Facts
- Developer
- Hewlett-Packard (HP)
- Common materials
- Nylon (PA12 and PA11)
- elastomers
- fibre-reinforced composites
- Claimed advantage
- Strength comparable to injection molding; more cost-effective at large scale compared to other 3D printing types
Facts from the source article.
Operation
The printer distributes a powder, usually nylon, in thin layers over a build surface. Between each layer, two liquids—a fusing agent and a detailing agent—are sprayed onto the powder using an inkjet. A heat source, often infrared light, then passes over the layer to bond the powder particles into a solid layer. The next layer of powder is applied on top, and the process repeats without additional support structures because the surrounding powder provides support. After printing, parts must be cooled and cleaned of excess powder. The result is claimed to often have better surface quality straight from the printer compared to fused filament fabrication (FFF).
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