Additive Manufacturing Services Spotlight: Multi Jet Fusion

In our additive manufacturing services spotlight series, we’re highlighting different 3D printing technologies customers can use for their parts and products.

Recently, we explored Fused Deposition Modeling (FDM) and Stereolithography. Today, we’ll take a closer look at Multi Jet Fusion (MJF), a 3D printing technology developed by HP.

What Is Multi Jet Fusion?

MJF is a powder-based technology that uses infrared light to fuse layers of powder together, using a fusing agent and a detailing agent.

The printhead deposits drops of the agents across a pre-heated bed of powder. The binding agent absorbs heat, priming the powder for melting. The detailing agent creates a cooling effect, which helps shape the part and improve its resolution. The powder is fused layer by layer until the part is complete. 

The powder is strong enough to support the part as it grows, eliminating the need for support structures. This feature allows for greater design freedom and the ability to print larger parts. 

MJF works almost exclusively with PA 12, a high-tensile, isotropic nylon material known for its incredible versatility and cost-effectiveness.

Why Use Multi Jet Fusion?

MJF is excellent for building functional prototypes as well as scaling parts. Here are a couple of reasons why we leverage this technology for our customers: 

• Cost-effective at scale. We use MJF when scaling up from prototyping because it’s much less expensive than FDM. PA 12 is relatively cheap to print, and the MJF machines are the fastest of all 3D printing technology. Customers have the opportunity to scale their additive products quickly and cost-effectively, provided PA 12 is a suitable material for the application. 
• Minimal post-processing. Another benefit of MJF is that minimal post-processing is required. Once the powder is fully fused during the MJF process, a vacuum removes loose debris, leaving a finish that’s often smooth enough for end-use parts. Although PA 12 comes exclusively in black, it’s easy to dye or paint to match customer specifications. 

Multi Jet Fusion is a low-cost, high-efficiency option for many prototypes and high-volume production parts and products. We’re always happy to answer any questions you have about different additive manufacturing services. Contact us today to learn more about MJF, and stay tuned for the next installment in our additive manufacturing services series!