Processes - Additive Manufacturing
Multi Jet Fusion (MJF)
Multi Jet Fusion (MJF) is a new powder-based 3D printing process that produces high-resolution and precise 3D objects with low porosity and high surface quality. In contrast to selective laser sintering (SLS), MJF completely dispenses with the use of a laser beam. An inkjet print head prints components by applying two different binder fluids to the surface of the powder bed.
MJF uses infrared lamps as an energy source; the lamps continuously illuminate the printing surface. The powder particles to be fused are wetted by the print head with a heat-conducting fluid (fusion agent). The particles absorb the heat of the lamps and fuse together as well as with the underlying layer. In order to prevent the powder particles from fusing with each other beyond the intended area, a heat-inhibiting fluid (detailing agent) is simultaneously applied around the contours of the component. This ensures that the surface of the 3D object will be uniform and smooth.
Advantages
High Speed and Efficiency
MJF can produce parts faster than many other 3D printing technologies, making it suitable for both prototyping and production.
Excellent Surface Finish
Parts produced with MJF have smooth surfaces and fine details, reducing the need for post-processing.
Complex Geometries
MJF can create intricate and complex geometries without the need for support structures, allowing for more design freedom.
Material Efficiency
The process uses powdered materials efficiently, with a high rate of recyclability for unused powder.
Isotropic Properties
MJF parts exhibit consistent mechanical properties in all directions, enhancing their strength and durability.
Disadvantages
Limited Material Options
Currently, MJF primarily supports a limited range of materials, such as Nylon PA12, PA11, and TPU.
High Initial Cost
The equipment and setup costs for MJF can be quite high, making it less accessible for smaller businesses or individual users.
Color Limitations
MJF parts typically have limited color options and often require additional dyeing processes to achieve desired colors.
Powder Handling
Managing and handling fine powder materials can be challenging and may require specialized equipment and safety measures.
Capabilities
Disclaimer: All process specifications reflect the approximate range of a process's capabilities and should be viewed only as a guide. Actual capabilities are dependent upon the manufacturer, equipment, material, and part requirements.