Parts in 1 to 3 days

Multi Jet Fusion

hp multi jet fusion

Table of Contents

What is Multi Jet Fusion?

HP Multi Jet Fusion printer is an industrial additive manufacturing process that uses a powdered thermoplastic liquid agent, and infrared energy precisely fuse. When the operation finishes, the AM Technician cleans excess powder off the parts, and then the parts are ready for use or a higher level of finish.

This technology can create functional nylon prototypes and end-use parts. A few ideal applications are brackets, connectors, hinges, housings, and thin-wall ductwork. Multi Jet Fusion is also great for producing accurate parts in higher volumes.

How Does Multi jet Fusion Work?

An AM Technician uploads your CAD file into the machine, and the software breaks it down layer by layer. Then the device using an inkjet array, applies a fusing and detailing agent across a nylon powder bed, which becomes fused by heating elements. When the laser finishes, a roller rolls a new layer of powder onto the powder bed, and the process repeats until the parts are complete.   

When the build finishes, the whole powder bed is removed and taken to a breakout station where AM Technicians remove the parts from the powder and brush the excess powder off. Then the components are placed into a container and blasted with a blasting medium to remove the remaining powder. After this step is complete, the parts get delivered to the finishing department.   

 Note: HP Multi Jet Fusion printer does not need support structures because the part is suspended in powder.  

HP Multi Jet Fusion Diagram

Ideal Applications For Multi Jet Fusion

Since Multi Jet Fusion’s materials, Nylon 12 is chemical resistant (alkalies, aliphatic hydrocarbons, greases, and oils), biocompatible, and Nylon 12 with glass has high strength, it can be used for a range of applications.

Functional Prototyping

Low-Volume Production Runs

End-Use Parts

Complex Geometries

Biocompatible Components



Watertight Parts

Multi Jet Fusion at Midwest Prototyping



Max Build Area:

 14.96 x 11.18 x 14.96 in

Lead Time:

1 – 3 Days


Nylon 12, Nylon 12 GB


± .005 in for the first inch and ± .002 in for each additional inch

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Multi Jet Fusion materials at Midwest Prototyping



Key Characteristics

More Information

Nylon 12 is a sturdy thermoplastic with exceptional physical properties.  

  • Chemical Resistant
  • Good for Snap Fits
  • Heat Resistant
  • High Strength
  • Impact Resistant
  • Rigid
  • UV Stability
  • Biocompatible* 

Nylon 12GB is a sturdy thermoplastic that’s 40% filled with glass beads, providing exceptional stability and high reusability.  

  • Heat Resistant
  • Rigid
  • UV Stability
  • High Resolution/High Detail
  • High Strength
  • Grey

*Special processing may be required. Please notify us of any biocompatibility needs.

Compare Materials

Designing parts for Multi Jet Fusion at Midwest Prototyping

HP Multi Jet Fusion printer is a powder-bed-based technology. It does not require supports, allowing more design freedom for designers and engineers. The powder is the ‘support’ when designs need complex geometries, interlocking parts, and overhangs. Material Jet Fusion also allows components to be tightly arranged together to optimize the productivity and speed of the build. The materials we offer have been proven and tested and are high-quality thermoplastics with mechanical properties similar to injection-molded parts with 100% density.



Supported Walls

.02 in

Unsupported Walls

Supports not required

Supports & Overhangs

Supports not required 

Embossing & Engraving

Width: .04 in, Height/Depth: .04 in

Horizontal Spans

Supports not required

Holes & Openings

.02 in

Connecting & Moving Parts

Moving: .012 in, Connecting: .006 in

Escape Holes

.04 in

Minimum Features

.03 in

Pin Diameter

.03 in

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Multi Jet Fusion finishing levels at Midwest Prototyping





Excess powder removed and lightly bead blasted

Standard finish: parts have visible layer lines and sandstone texture.


Excess powder removed, lightly bead blasted, and sealed to lessen porosity

Sealed finish: parts have visible layer lines, sandstone texture, and a slight gloss. Parts have a watertight finish.

2 +

Excess powder removed, lightly bead blasted, and cosmetic surfaces sanded to 180 grit

Functional finish: removes some layer lines. Parts have a light texture from sanding.


Excess powder removed, lightly bead blasted, and smoothed using PostPro3D

Automated finish: is used to perform physiochemical smoothing. Smoothed parts have an air-tight, injection molded like finish


Sealed, primed, or smoothed with PostPro3D and sanded to 320 grit

Near show quality finish: removes layer lines. Parts may have very fine scratches from sanding. Parts are prime and paint ready.

Design Tips and Tricks

3d printed enclosure

Enclosures are commonly found protecting electrical components. They can also be found in automotive and consumer products, from deli one-time-use clamshells to storage cases for earbuds.  Enclosures make moving products easier. They can contain multiple components in one space, so your customers won’t lose anything.

Learn More →

Producing Legacy Parts for a 1967 Sunbeam

Finding solutions to replace rare parts in a 1967 Sunbeam with additive manufacturing, specifically Multi Jet Fusion.

University of Wisconsin - Platteville SAE Baja Team utv
UW Platteville Baja SAE Team

UW Platteville competes in the SAE Baja competition annually utilizing Laser Sintering and Multi Jet Fusion in their designs.


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