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HP Multi-Jet Fusion (MJF)
3D Printing Services

Volume Production of High Performance End-Use Parts

Multi-Jet Fusion (MJF) is an advanced manufacturing technology that provides designers unparalleled production flexibility, allowing for cost-efficient customization and batch production at high volumes using 3D printing.

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3D printed MJF sample cube by forge labs

What is Multi-Jet Fusion (MJF) 3D Printing?

Multi Jet Fusion (MJF) is a industrial 3D printing technology that chemically melts powder together to create strong, precise and detailed parts. Primarily used for end-use manufacturing, it is a highly cost-effective solution for low to medium volume production of functional  3D printed parts. MJF eliminates the need for expensive tooling and enables production flexibility, allowing for cost-efficient customization and batch production at high volumes.

 

This advanced additive manufacturing technology delivers excellent dimensional accuracy and the ability to achieve intricate and fine details. By utilizing detailing agents, MJF enhances the resolution of printed parts, resulting in sharp edges, thin walls, and small features. This level of precision is crucial for designers seeking high-quality, intricate designs, and complex geometries with consistent mechanical properties throughout the the entire part.

MJF 4200 3D printer

15" x 12" 

Max X/Y Build Volume

± 0.3

MM Part Tolerances

2

High Performance Materials

5-8 Day

Average Lead Time

Materials| HP Multi-Jet Fusion

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PA 12 Grey

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PA 12 Black

Grey Nylon PA12 part printed using MJF

HP PA12 Natural Grey

Tough and Durable 

HP High Reusability PA12 is a highly durable nylon 12 material with excellent surface resolution. PA12 produced using Multi Jet Fusion is very high density (98%) makes the parts highly durable and ideal for creating parts that need to withstand heavy use or exposure to harsh environments. Its high strength-to-weight ratio also makes it a great option for lightweight parts that require a high degree of strength and durability. Parts produced with this material have consistent and reliable quality. This is particularly important for complex parts or assemblies that require a high degree of precision. Parts are watertight and capable of meeting USP Class I-VI and US FDA guidance for biocompatibility.

 

Tensile Strength

48 MPa

Tensile Elongation

20 %

Flexural Strength

70 MPa

Izod Impact, Notched

3.5 kJ/m2

Heat Deflection

95 °C @ 1.82 MPa

Material Data Sheet
Black Nylon PA12 part printed using MJF

HP PA12 Black

Tough, Durable & Black

HP PA12 is a durable nylon material with excellent surface resolution that is deep color dyed black. The black color dye absorbs deeply into the part to offer an uniform matte finish that is both durable and highly abrasion resistant for long term functional use. 

 

Tensile Strength

48 MPa

Tensile Elongation

20 %

Flexural Strength

70 MPa

Izod Impact, Notched

3.5 kJ/m2

Heat Deflection

95 °C @ 1.82 MPa

Material Data Sheet
Multi-Jet Fusion

Material Surface Finishes

sample finish of an MJF part

Natural

Basic Finish

Natural grey is the raw color for all Multi-Jet Fusion parts. Parts are depowdered using media blasting leaving a finely textured natural grey color.

 

Surface Texture

Matte.

Color & Appearance

Grayish or slightly off-white color.

Detail

Intricate details are usually well-represented and clear.

Porosity

Tiny spaces may exist between fused particles.

Turnaround Time

No additional time required
sample finish of a black MJF part

Dyed Black

Standard Finish

Deep black dye is a fast, cost effective solution that improves the cosmetics of printed parts. This finish provides additional scratch resistance and improves color uniformity

 

Surface Texture

Matte.

Color & Appearance

Solid black.

Detail

Intricate details are usually well-represented and clear.

Porosity

Tiny spaces may exist between fused particles.

Turnaround Time

+1 business day
industrial painting services for 3D printed parts

Performance Paint

Premium Finish

Painting enables a highly durable automotive-grade coating of 3D printed parts. Parts are hand finished to a high quality and painted using high quality coating equipment.

 

Surface Texture

Matte to semi-gloss

Color & Appearance

Color matching available

Detail

Fine details may be lost if polishing is required.

Porosity

None

Turnaround Time

+2 or more business days

Advantages
Why Use Multi-Jet Fusion?

Multi-Jet Fusion builds parts by spreading a thin layer of powdered material across a build platform. Multiple jets then apply two types of liquid agents onto the powdered bed: the fusing agent and the detailing agent. The fusing agent is selectively applied to the areas where the part is to be formed. It helps bind the powder particles together during the subsequent heating process. The detailing agent is applied to the areas requiring fine details and features, enhancing the resolution of the printed part. After the agents are applied, a heating unit passes over the powdered bed causing it to melt and bond the powder particles together. The build chamber is then rapidly cooled to solidify the fused powder and maintain its shape and integrity. This process is repeated for subsequent layers, with a new layer of powder spread and the agents applied according to the digital design specifications.

 

One of the key benefits of Multi-Jet Fusion is its speed. Unlike other power bed fusion 3D printing methods, MJF utilizes an array of jetting nozzles that simultaneously deposit fusing and detailing agents onto a powder bed. This parallel processing enables rapid manufacturing, reducing production time compared to other techniques. The speed of MJF makes it ideal for quickly iterating and testing designs, accelerating product development cycles as well as producing large volumes of parts for production.

Forge Labs HP Multi-Jet Fusion 3D Printing Lab
Multi-Jet Fusion
Design Guidelines

HP Multi-Jet Fusion is an new additive manufacturing technology that bridges the gap between 3D printing and injection molding. This design guidelines covers specific design parameters, which will need to be followed to prevent build failures from occurring. We have set the minimum allowed tolerances specified by the engineers from the manufacturer which will need to be followed or your parts may not meet the specific tolerances required or may cause the entire build to fail.

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Maximum Build Volume

380 x 284 x 380 mm. (15 x 11.2 x 15 inches)
Forge Labs Multi- Jet Fusion 3D Printing machines have a building volume of: 380 x 284 x 380 mm (15 x 11.2 x 15 inches), a standard layer thickness of 80 um. Parts are manufactured additively using a sintering agents that are selectively deposited onto a bed of polymer to fuse layers together. This process allows for exceptionally fast manufacturing, and excellent resolution of small details.
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Tolerances

±0.3%, with a lower limit of ±0.3 mm
Layers are fused together using a binding agent that selectively deposits binding agents onto a bed of polymer to create a solid structure. The machine builds up each cross section in 80 micron layers, which makes layers nearly invisible in the final part. Most geometries are produced within +/- 0.3mm and are highly repeatable from build to build.
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Layer Height

80 Microns

The layer height is the overall Z resolution of the part; we avoid stepping artifacts on important features of your models by orienting the part(s) along the Z plane or at a 20 degree angle on all sides. Unless otherwise specified, all SLS parts are printed at a 100 micron layer height.

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Surface Finish

Uniform, Matte
Parts produced by Multi Jet Fusion have a grainy finish similar to very fine sandpaper. Parts can be deep color dyed or painted to achieve different colors & finishes.
Optimizing your designs for Multi-Jet Fusion will help keep manufacturing costs down by ensuring the most efficient batch productions. The cost of a part is primarily based upon the X, Y, & Z extents of your part, therefore small, dense parts are priced the most competitively in this technology. There is no extra change for complexity, meaning even the most difficult geometries can be manufactured inexpensively and with ease.
Multi-Jet Fusion

Applications & Case Studies

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Medical Devices For Covid-19

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3D Printing on the East Coast

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Frequently Asked Questions