What material does MJF use?

Material pa12

HSS combines the binder jetting process with SLS printing materials. This cutting-edge technology uses an inkjet head to apply a heat-absorbing ink across the surface of the powder bed to areas that will be sintered to create parts. This ink absorbs heat from an infrared lamp and a series of heaters inside the printer to form 3D printed parts.

HSS is very similar to the Multi-Jet Fusion (MJF) process licensed from HP, with the main difference being the additional layer of ‘detailing agent’ used in the HP process is applied through the inkjet head after the heat absorbing ink.

Polyjet 3d printing

When we think about a project for 3D printing with MJF the most normal thing is that doubts arise. And it is normal, we want our project to be perfect. That’s why we answer the 13 most frequent doubts related to additive manufacturing with MJF at S3 Advanced Engineering.

The result will be a compact cube of PA12, which will contain the printed parts inside and from which dust will have to be absorbed, to gradually polish and remove the parts from inside.

The material used to 3D print with MJF is Multi Jet Fusion PA12, a strong thermoplastic, perfect for producing high quality parts. This 3D printing material consists of a fine-grained powder, which manufactures ultra-thin layers of 80 microns. This leads to parts with high density and low porosity which, compared to PA 12 parts produced by laser sintering, allows complex shapes to be manufactured, which is suitable for both prototyping and final part production. It is also a highly resistant material that, when used with this technology, provides numerous applications in the field of engineering. This makes it one of the best options for 3D printing in the field of industrial engineering.

Printing on metals

In this guide, we explain the details of the MJF process, how it works, the compatible materials, its applications and all the advantages and disadvantages over other technologies such as selective laser sintering and binder jetting.

Once the built unit has been inserted into the 3D printer, you can start printing. HP offers its own 3D printer software that assists in printing by efficiently packaging the build chamber to make the best use of the print material.

Once printing has started, a layer of build powder is applied over the print area. A fusing agent is then applied over the dimensions to solidify the print. This is very similar to binder jetting in that the fusing agent enhances heat absorption, meaning that area will solidify under heat while the rest of the material is unaffected.

This may sound similar to SLS 3D printing, and it is. The process is similar to Selective Laser Sintering, although instead of using a laser to sinter the part, MJF uses these dye agents to solidify the part using infrared.

Stereolithography applications

HP has generated a lot of expectations in the 3D printing industry with the announcement of the Multi Jet Fusion (MJF) technology. Discover this new technology ideal for those projects with short lead times and where low porosity and excellent surface quality are required for low volume runs and functional prototypes.

Multi Jet Fusion is a non-laser based powder technology. The powder bed is heated uniformly at the exit. A melting agent is sprayed at those points where the particles have to be selectively fused. A detailing agent is also sprayed on the contours to improve part resolution. As the lamps pass over the surface of the powder bed, heat is captured by the sprayed material and contributed evenly.

Unfinished parts typically have a smooth surface with no visible layers and a stone gray color. Parts produced by Multi Jet Fusion can be sandblasted and colored or impregnated.