What is Multi Jet Fusion?
A new generation of 3D printing technology.
How does MJF work?
MJF uses a unique process in which thousands of inkjet nozzles simultaneously apply a "fusing agent" and "detailing agent" onto a thin layer of nylon powder. An infrared heat lamp then selectively activates the powder where the fusing agent has been applied.
The detailing agent ensures sharper edges and finer details by reducing heat absorption in specific areas. This results in parts with excellent surface quality and mechanical properties.
Advantages of MJF
- 10x faster: than traditional SLS printers
- Cost-effective: low cost per part
- High pack density: more parts per build
- Detailed surfaces: fine details possible
MJF specifications: layer thickness 0.08 mm, build volume 380 x 284 x 380 mm, material PA12 Nylon, price €0.52/cm³.
The Speed Revolution
MJF redefines production time in 3D printing: 10x faster than traditional SLS printers, 80% higher pack density with more parts per build and 24/7 continuous production capacity.
Why is MJF so fast?
Parallel processing: while traditional SLS printers laser point by point, MJF applies agents simultaneously across the entire layer, followed by uniform heating.
Optimal packing: thanks to advanced temperature control, parts can be placed closer together, allowing more parts per build.
Quality and Properties
Mechanical Properties
- Tensile strength: 48 MPa
- Flexural strength: 69 MPa
- Elongation: 20%
- Impact strength: 5.0 kJ/m²
Surface Quality
- Smooth surfaces: minimal texture
- Fine details: 0.1 mm features possible
- Isotropic properties: uniform strength
- Water resistant: closed surface
Comparison with SLS: MJF parts have 15% better surface quality and 25% higher density than comparable SLS parts.
Applications of MJF
- Automotive: functional prototypes, end-use components, production jigs & fixtures, interior parts
- Electronics: housings, brackets & mounts, connectors, cooling components
- Aerospace: lightweight components, complex geometries, ducting & manifolds, tooling
- Medical: prostheses, surgical guides, instruments, anatomical models
- Industrial: jigs & fixtures, end-use parts, replacement parts, custom tooling
- Sports: personalised items, protective gear, equipment parts, performance optimization
Cost-effectiveness
Why MJF is cost-effective
- Lower production costs: due to higher speed
- Reusable powder: up to 80% recycling
- High pack density: more parts per build
- No support needed: less post-processing
Cost advantage: traditional production €8.50/part, SLS 3D printing €6.20/part, MJF 3D printing €4.80/part — a saving of 43% with MJF.
The Future of MJF
New developments
- New materials (PP, TPU)
- Larger build volumes
- Improved speed
- Colour capabilities
Expectations
- 50% cost reduction by 2025
- Fully automated production
- Integration with Industry 4.0
- Mainstream adoption
Conclusion
MJF 3D printing is revolutionising the production industry through a unique combination of speed, quality and cost-effectiveness. For companies looking for scalable production of functional parts, MJF offers a compelling alternative to traditional production processes.
At Makernaut, we are proud of our state-of-the-art MJF facilities and help companies implement this revolutionary technology in their production processes.