Multi Jet Fusion, or MJF, is a 3D printing technology that uses an inkjet array to selectively apply fusing and detailing agents across a bed of powdered material, which are then fused using heat and pressure to form a solid layer. The process starts by placing a moveable build unit into the printer. Then, the printing and fusing carriage moves across the build area, preheating the powder to a specific temperature to provide material consistency. After this, an array of inkjet nozzles fuses agents onto the powder bed in areas that correspond to the part’s geometry and properties. After each layer is finished, the build unit retracts to create space for the next layer of material to be deposited. This process is repeated layer by layer, from the bottom of the part up, until the build is completed.
MJF was developed by HP and was first introduced in 2016. It is considered a next-generation 3D printing technology due to its ability to produce high-quality parts with good mechanical properties, as well as its speed and ability to print multiple parts at the same time.
MJF 3D printing has a diverse range of applications across many industries.
|HP 3D High Reusability PA 11||A bio-derived thermoplastic material delivering optimal mechanical properties, excellent chemical resistance, and enhanced elongation-at-break. It is biocompatible and meets USP Class I-VI and US FDA guidance for Intact Skin Surface Devices. Has good impact resistance and ductility for prostheses, insoles, sporting goods, snap fits, living hinges, and more.|
|HP 3D High Reusability PA 12||A robust thermoplastic that produces high-density parts with balanced property profiles and strong structures. Provides good chemical resistance to oils, greases, aliphatic hydrocarbons, and alkalies. It is biocompatible and meets USP Class I-VI and US FDA guidance for Intact Skin Surface Devices. Ideal for complex assemblies, housings, enclosures, and watertight applications.|
|HP 3D High Reusability PA 12 Glass Beads||A 40% glass-bead-filled thermoplastic material with both optimal mechanical properties and high reusability. Provides dimensional stability along with repeatability. Ideal for applications requiring high stiffness like enclosures and housings, fixtures, and tooling.|
|HP 3D High Reusability PP||Has excellent chemical resistance and low moisture absorption ideal for piping or fluid systems and containers. Outstanding welding capabilities with other polypropylene parts produced with traditional methods like injection molding. It is biocompatible and meets ISO 10993 and US FDA guidance for Intact Skin Surface Devices Statements. Versatile material ideal for a wide range of applications.|
Thermoplastic polyurethane (TPU)
|BASF Ultrasint® TPU01||A multi-purpose material offering a balanced property profile with good flexibility, shock absorption, and the possibility to print very fine structures with a high level of detail. This material is easy to print and has good UV and hydrolysis resistance.|
This table depicts the general tolerances for Multi Jet Fusion. Stresses during the build and other geometry considerations may cause deviation in tolerances and flatness. Part designs with thicker geometries, flat or broad parts, and parts with uneven wall thicknesses may be prone to significant deviations or warp. Improved tolerances may be possible and must be approved on a case-by-case basis. General tolerances apply before secondary finishing or post-processing unless otherwise specified.
±0.012″ (0.3048 mm) up to 4″ (101.6 mm) is typical, plus ±0.003″ (0.0762 mm) for every inch (25.4 mm) thereafter
Up to 15″ x 11″ x 15″ (381 x 279.4 x 381 mm). Recommended usable area is 14″ x 11″ x 13″ (355.6 x 279.4 x 330.2 mm).
Minimum feature size
>0.020″ (0.508 mm)
0.004″ (0.1016 mm)
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