ABOUT MJF 3D PRINTING

MJF (Multi Jet Fusion) is a method of additive manufacturing that produces highly functional prototypes and end-use parts with an excellent surface using the Powder Bed Fusion process. The process is actually quite similar to (Selective Laser Sintering), however parts offer better feature resolution and improved mechanical properties.

The process prints exclusively in a Nylon 11 (PA11) material, with the exception of a glass filled variant. Parts are initially printed in a Grey colour, however a dye can be applied to make parts matt black. 

Other post processing includes bead-blasting, which will remove any layer lines and leave a light textured finish.

The resulting parts offer great mechanical properties and an excellent surface finish. Although a relatively new process, MJF is quickly becoming the go-to 3D printing process, offering the functional benefits of ABS FDM 3D printing and the surface finish benefits of SLA 3D printing.
 

HOW DOES

MJF 3D PRINTING WORK?

Multi Jet Fusion uses agents to selectively fuse Nylon powder together in a pre-determined shape. Heating elements then turn this powder into a solid layer. Once the first layer is completed, this process repeats on top of the existing layer. until he whole 3D shape has been achieved.

Once completed, loose powder which has not been fused is removed, usually using a vacuum. Finally, parts are post processed with a bead blast and/or black dye to apply a light texture and improve appearance.

Unlike other 3D printing process, the surplus powder can be reused, making MJF one of the most environmentally friendly and efficient 3D printing processes available.

WHEN TO USE MJF 3D PRINTING

MJF (Multi Jet Fusion) 3D printing creates parts to an excellent resolution of 80 microns means intricate shapes can be created with a smooth surface finish. The mechanical properties and dimensional accuracy of MJF 3D printing but limited material and colour choices mean it is usually used for functional and engineering focused components.

Well designed parts will be free from warpage, however it is important to note that some parts may be subject to warpage if design guidelines are not followed.

MJF PRINTING PROS

Dense property profiles and high density parts

Excellent chemical resistance to oil, greases and alkaline

Great mechanical properties

Good surface finish. No layer lines

High dimension accuracy

Ability to print intricate details

Great layer resolution (80 microns)

MJF PRINTING CONS

Higher costs

Unnecessary for many applications

 

Badly designed parts can suffer from extensive warpage

Limited colour choices (Grey or Black)

Cannot achieve a gloss surface finish

Only 2 material choices (Nylon 11 & Glass Filled Nylon)

DESIGN GUIDELINES

Read our detailed design guidelines for designing parts for the MJF 3D printing process.

© Sooko Ltd (T/A Print My Part). Registered in England and Wales Number: 09730011. 

Unit 19B, eSpace North, Wisbech Road, Ely, Cambridgeshire, CB6 1RA, United Kingdom

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