Multi Jet Fusion Hp

The HP Multi Jet Fusion is a recent 3D printing process quite similar to conventional powder sintering which also uses Polyamide (PA12) powder to produce the prototypes.

At Axis it is necessary to send us a 3D file if you want us to produce your prototype. As for sintering powder, the machine will deposit thin layers of polyamide powder that will be added to each other. Instead of the laser present on conventional laser sintering machines, here they are arms that deposit contouring and melting agents on the powder deposited in 0.8 mm layer. Then, another arm producing light will come to pass on the layer of powder mixed with the agents: the material will thus merge thanks to these different agents which allow the production of the prototype. Once the production is finished, the production chamber will go down in temperature: we do not handle the parts as long as the manufacturing is hot in order to avoid any deformation. It will be necessary to clean the parts to remove all the superfluous powder and to sand them to obtain the prototype or the final part.


Multi Jet Fusion: The latest generation 3D printer at Axis in video

Multi Jet Fusion HP : the highlights

The Multi Jet Fusion produces parts with extremely thin surface conditions, which allows for prototypes with a lot of details.

This 3D printing process of Multi Jet Fusion HP allows for multiple finishes. Naturally gray, the parts can be stained in black very easily since the prototypes are less porous than in conventional powder sintering with this technology. We also have the ability to obtain other finishes with Jet Metal metallic paint or plating process after priming. We can mount your prototypes together to verify the proper assembly of these. So it is possible for you to test their mechanical strength once the prototype received.

Finally, this additive manufacturing technique being faster than most printing technologies, we can be very responsive and ship your prototypes within a few business days.

Multi Jet Fusion: the possible applications

If you want to produce small or medium series of prototype parts, the Multi Jet Fusion HP is ideal because it is faster than the vacuum casting process thanks to its production and cooling time.

However, we can only produce flexible rigid parts, unlike vacuum casting, which allows you to produce your parts according to the desired hardness.

This 3D printing process of the HP brand is also to be preferred in cases where a good dimensional accuracy is necessary with a lot of details and a certain fineness of room. It is also often chosen because the parts created have good mechanical and thermal resistance, and are durable because they retain all their technical characteristics over time. Multi Jet Fusion HP is also selected when good resistance to different chemicals such as solvents or hydrocarbons is needed.

Offered Material for rapid prototyping with Multijet Hp Fusion

PA 12: Polyamide type PA 12. The material has good elasticity and high impact resistance. In addition, polyamide has an excellent resistance to chemical agents, like hydrocarbons, oils and solvents. It combines resistance and durability in the production of prototype pieces which are robust and durable.

Our machine park

1 HP 4200 : 380 x 284 x 380 mm

1 HP 4210 :  380 x 284 x 380 mm

Multijet Fusion for rapid prototyping by Axis

The HP Multi Jet Fusion: how does it work?
As with any prototype production at Axis, it is essential to have a 3D file so that we can create your prototype. We accept several file formats to launch in production: IGES, .STEP, .STL, .CatPart.

After receiving your voucher for approval, the 3D file is sent to the machine via a computer driver with software to “set up” parts on the production surface of the HP Multi Jet Fusion machine.

Our Multi Jet Fusion HP machine consists of 2 elements: the first is the “printer” that makes your prototypes, the second is the cooling and de-dusting station.


Once the machine is launched, the manufacturing chamber will rise to a temperature of 140 ° C to begin manufacturing, then a first layer of white PA material 12 will be deposited by an arm. Unlike other 3D printing technologies, 0.8mm layers will be deposited instead of 0.10mm.

A second arm will go one way to add black fusion and contour agents across the entire workspace to define where the powder will merge. Then on the return of this same arm a fusion energy will be diffused thanks to “fusion” lamps which pass over the matter. At each passage of these two arms, the machine controls the so-called “melting” temperature which must reach 165 ° C in order to fuse the material. The ventilation then refreshes the manufacturing chamber to lower the temperature of the material in order to solidify it. This step also cools the 3 print heads that are sensitive to heat. The layers will then succeed each other until the prototypes are printed.

Subsequently, once production is complete, the production bin will be installed in the HP Multi Jet Fusion’s cooling and de-icing station. The parts will cool in this station according to a time indicated by the machine. We do not have access to manufacturing before this step to avoid any deformations but also to avoid the technician to hurt himself when the prototypes are de-powdered. After this step comes the cleaning of the parts. Excess unfused powder is recovered by the machine and recycled to mix with new polyamide (PA12) powder for future productions.

After that, the prototype parts are sanded and ready to receive all the finishes proposed by Axis. The most commonly requested is the black color which allows to obtain pieces of uniform color.

The Multi Jet Fusion Hp in Summary:

Multi Jet Fusion HP: explication en image

The HP Multi Jet Fusion and its benefits
The HP Multi Jet Fusion has quite different advantages from conventional powder sintering. Like laser sintering, the parts produced in Multi Jet Fusion HP have a high mechanical strength allowing to make functional parts with also a good thermal resistance. This 3D printing technology also allows you to make parts with extreme dimensional accuracy with the ability to obtain relatively fine detail through accurate printing.

Also, the production and cooling time of the HP machine to produce the Multi Jet Fusion parts is less compared to the powder sintering which allows to obtain parts faster and to make small series of the same prototype. On the other hand, as for sintering, we have to wait for the recommended cooling time to release the production, even if this time is less than for laser sintering.

The HP Multi Jet Fusion and its disadvantages
After a few years of experience with this additive manufacturing process, we have not yet found a disadvantage in Multi Jet Fusion.

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