High-Quality
Multi-Jet Fusion Parts

Parts in 1 to 3 days.

HP Multi-Jet Fusion (MJF) is used for:

Quality Matters  |  AS9100D Certified, ISO 9001:2015, ISO 13485:2016, & ITAR Registered

Certifications and Registrations

* Not all locations have all certifications and registrations. Parts requiring these will be made at facilities with the correct certifications and registrations.

Additive Manufacturing Technology_Multi Jet Fusion (MJF)
Table of Contents

What is Multi-Jet Fusion?

The HP multi-jet fusion printer employs an advanced additive manufacturing process that utilizes powdered thermoplastic material, liquid agent, and infrared energy to seamlessly fuse components with remarkable accuracy. Following the completion of the process, our AM Technicians expertly remove any excess powder from the pieces, thereby rendering the parts ready for use or further refinement.

This cutting-edge technology is adept at generating functional nylon prototypes and end-use parts. Its real strength lies in producing brackets, connectors, hinges, housings, and thin-wall ductwork with utmost precision. Multi-jet fusion is also ideal for crafting intricate details in large quantities.

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, using an inkjet array, the device 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: The HP multi-jet fusion printer does not need support structures because the part is suspended in powder.  

AM Technology_Multi-Jet Fusion (MJF)

Advantages to Multi-Jet Fusion

Multi-jet fusion technology has revolutionized the way products are designed and manufactured. The following are a few of the advantages of multi-jet fusion:

Disadvantages to Multi-Jet Fusion

While there are a lot of advantages to multi-jet fusion, there are also some disadvantages to consider:

Multi-Jet Fusion at Prototek

OEM:

HP

Max Build Area:

14.96 x 11.18 x 14.96 in

Lead Time:

1 – 3 Days

Material:

HP Nylon 12, HP Nylon 12 GB

Tolerances:

± 0.005 in for the first inch and ± 0.002 in for each additional inch

Prototek's Materials

Material

Description

Characteristics

More Information

It is a high-performance multi-jet fusion material with exceptional strength, versatility, and durability. It is made of a nylon powder with excellent long-term stability and high chemical resistance, making it an ideal choice for various industrial and commercial applications.

  • Grey
  • Abrasion Resistant
  • Biocompatible*
  • Chemical Resistant
  • Good for Snap Fits
  • High-Density
  • High Detail/High Resolution
  • High Strength
  • Impact Resistant
  • Watertight

It is a highly durable thermoplastic with exceptional mechanical properties made from a blend of nylon and glass beads, comprising 40% of the material. The addition of glass beads makes the material stronger. It enhances its dimensional stability, making it less likely to warp or deform under high temperatures or mechanical stress.

  • Grey
  • Biocompatible*
  • Chemical Resistant
  • High-Density
  • High Detail/High Resolution
  • High Strength
  • Rigid
  • UV Resistant
  • Watertight

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

Design Recommendations

When designing parts for HP multi-jet fusion (MJF), it is crucial to consider a few key considerations to ensure the best possible outcome. MJF is a powder-based manufacturing process, so the design should be optimized for this technique. It is essential to consider the effects of thermal expansion, which may cause slight changes in the dimensions of the final product as the powder material heats up during printing. To avoid distortion, it is recommended to steer clear of overly thin or delicate structures and ensure that tolerances are specified correctly. Lastly, designers should take advantage of MJF’s advantages, such as high resolution, fast build speed, and low post-processing requirements. By considering these factors, designers can create parts optimized for production and meet the specific needs of their applications.

Prototek's Additive Design Poster
Feature Measurements

Connecting & Moving Parts

Connecting: 0.006 in
Moving: 0.012 in

Escape Holes

0.04 in

Embossing & Engraving

Width: 0.04 in
Height/Depth: 0.04 in

Holes & Openings

0.03 in

Horizontal Spans

Supports Not Required

Minimum Features

0.03 in

Pin Diameter

0.02 in

Supports & Overhangs

Supports Not Required

Walls (Supported)

0.02 in

Walls (Unsupported)

Supports Not Required
Feature Measurements

Connecting & Moving Parts

Connecting: 0.15 mm
Moving: 0.3 mm

Escape Holes

1 mm

Embossing & Engraving

Width: 1 mm
Height/Depth: 1 mm

Holes & Openings

0.5 mm

Horizontal Spans

Supports Not Required

Minimum Features

0.7 mm

Pin Diameter

0.5 mm

Supports & Overhangs

Supports Not Required

Walls (Supported)

0.5 mm

Walls (Unsupported)

Supports Not Required

Multi-Jet Fusion Finishes

Multi-jet fusion (MJF) is an additive manufacturing process that produces high-quality parts with excellent surface finish. The surface finish refers to the quality of the outermost layer of a part, and it is a critical factor in determining its visual appearance, physical properties, and overall performance.

MJF technology offers different finishing levels, depending on how much post-processing is desired. The essential finishing story involves removing excess powder and polishing the part, resulting in a smooth, matte surface finish. Nearly all MJF parts undergo this finishing level.

The next level of MJF finishing involves bead blasting or tumbling, which creates a slightly textured, matte finish. This level is ideal for parts that require a rough surface to improve grip or enhance the aesthetic value of the component.

A higher level of finishing includes dyeing or painting the part. This level benefits components that require a premium finish, such as consumer products or medical devices.

In summary, MJF offers different finishing levels that range from basic to highly refined, allowing designers and engineers to select the class that best suits their application needs.

Multi Jet Fusion (MJF) - HP Nylon 12
Why choose Prototek for your next multi-jet fusion project?

There are several reasons why someone might choose Prototek for multi-jet fusion services. Prototek offers high-quality multi-jet fusion services at competitive prices. Customers can get the needed parts without compromising quality or budget. Our experienced engineers and technicians can provide expert advice and support throughout the multi-jet fusion process, from design to production. This ensures customers get the best results from their multi-jet fusion projects. Thirdly, Prototek has state-of-the-art equipment and facilities that enable it to produce HP multi-jet fusion parts quickly and efficiently. This means that customers can get their parts faster, which can be especially important in time-sensitive projects.

What do our customers say about us?
They are competitively priced for their services and a very personable team to work with. If you haven't used them - do it! You'll have a lifelong vendor you be happy with that repeatedly goes above and beyond what is asked.
Product Designer
We are extremely happy with the quality of the parts as well as the level of service - thanks!
VP Product Designer