Invented by HP, Multi Jet Fusion (MJF) is a relatively new technology in the additive manufacturing scene. Taking full advantage of HP’s decades of experience and investment in Ink Jetting technology. MJF is taking leaps and bounds and gaining industrial-scale maturity.
How does Multi Jet Fusion work?
Similar to processes like Selective Laser Sintering (SLS), the build starts off with the printer dispensing a layer of powder across the build platform. After, the Inkjet Head moves across the build platform first depositing a fusing agent at the desired areas and then a detailing agent. After which a heating unit will move across the print area, melting the areas that have the fusing agent applied to it. The areas that were deposited with the detailing agent will continue to remain as a powder. Where it differs compared to the other Powder Bed Fusion Processes is that the new material and deposited agents are added while the previous layer is still in a molten state. This allows for both layers to fuse completely with better part durability and finer detail. Just like SLS, during this process, it does not require any supports as the unfused powder will act as the support.
What Materials does Multi Jet Fusion use?
Multi Jet Fusion technology focuses only on polymers or plastics like:
For a more in-depth look at the materials, click here.
Good Print Quality and Mechanical Properties
Multi Jet Fusion technology is able to produce parts with a good surface finishing. This is desirable for end-use prototypes and products. It is also able to accurately print fine details and features of 0.5mm in size. Besides that, it also has similar mechanical properties across the part.
Reduced Cost Per Part
As MJF technology was designed with production in mind, its quick printing speed and production cycles results in a swift turnaround time and reduces the cost per part. Additionally, the unfused powder can be reused which results in less waste and cost reduction.
While not all of HP’s machines have full-colour support, their high-end machines are able to support full-colour printing by depositing dying agents during the process. This is a huge plus for end-use prototypes or even products.
No Supports Needed
As the unfused powder acts as supports no additional material is needed to be used to create structural support, allowing the designers more freedom to create more complex structures.
Expensive Printer Cost
Although the cost per part may be significantly reduced, the printer itself is very expensive, starting at S$150,000.
Raised Features May Be Lost During Post-processing
As the post-processing requires the powder to be removed to retrieve the part, some small, raised features may break off or be damaged during the process.
Get your parts 3D Printed today! Need help to decide? Contact us and we will get back to you.
Some links to articles are not live yet, please be patient while we continuously update our site with new articles and this post if there are any new developments.