HP Multi Jet Fusion (MJF)

Print production-quality parts with accurate and detailed part finish using HP Multi Jet Fusion (MJF) 3D printing.

HP Multi Jet Fusion Technology

HP Multi Jet Fusion, or MJF, is a new powder-based 3D printing process created by HP for scaling industrial printing volumes from prototype to production. MJF is a digital manufacturing platform for additive manufacturing which combines many of the current 3D printing technologies of Binder Jetting, PolyJet, and Selective Laser Sintering (SLS) to create strong prototype and production parts quickly.

This allows MJF to 3D print production-quality parts in nylon, as well as other materials, fast with an accurate and detailed part finish. In addition to production components, the MJF 3D printing process is good for durable prototypes, printed color parts, living hinges, fit, form and function parts and printed assemblies. Parts are usually available in as little as 3-5 days.

HP Multi Jet Fusion 3D Printing Machine Running

HP Multi Jet Fusion 3D Printing Process

HP Multi Jet Fusion Parts

MJF works by using an inkjet-style process to deposit fusing and detailing agents to control voxels that are then fused into a solid layer then repeated until the build is complete. After the build is complete, the build is cooled then transferred to a processing station for loose powder removal and recycling.

Similar to SLS, MJF additive manufacturing doesn’t require supports while printing, unlike fused deposition modeling (FDM) or stereolithography (SLA). Building without supports allows parts to be nested within the powder build chamber which increases build efficiencies by increasing build capacity, reducing material consumption and reducing labor intensive support removal.

In the end, HP MJF parts are production-ready and can be easily post-processed to match the final custom finish required for all different applications like industrial, consumer goods and automotive markets.

MJF Benefits

  • Strong, tough, durable parts
  • Fine feature resolution and surface finish
  • Thermoplastic materials: Nylon, GF Nylon, PP, TPU
  • Economies of scale with fast, nested prints
  • Isotropic mechanical properties
  • Print complex organic shapes and
    working assemblies with no supports

MJF Best Uses

  • Replacement parts
  • Snap fits and living hinges
  • End-use production of all volumes
  • Air-tight and leak-proof
  • Color printing

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MJF Materials

HP MJF process builds parts using thermoplastic materials: Nylon PA11, Nylon PA12, Glass Filled Nylon, PP and TPU. The most popular material is Nylon PA12 which works great for all different parts that require tough, durable and flexible for prototype and production. All materials are sustainable as the processes refreshes the powder with recycled powder to reduce production costs while keeping part properties. Learn more about the available MJF materials.

All parts can be custom finished to match your prototype or production needs using HP’s color printing, dyeing, vapor smoothing, painting or plating.

MJF Printed Mask

HP Multi Jet Fusion Equipment

HP Jet Fusion 5200 3D Printer

The HP 5210 printer has a build volume measuring 14.9” x 11.1” x 14.9” which is large enough to cover most 3D printed parts. The biggest benefit is that a full build will print in about a half day or less and can be packed full of all different parts without supports making it prime for lots of prototypes or production projects. Parts larger than the build size can easily be sectioned to build in pieces then assembled in post-processing. The HP 5210 is setup for production with multiple cooling stations and a processing station so that the machine can continually run with parts are being cooled and post-processed outside the build chamber.

HP MJF Build & Design Guidelines

HP MJF offers amazing part details, but each 3D printing technology ranges on what size features it can build see below for best standard practices

  • Build Layers = 80 microns (0.003”)
  • Minimum Walls Thickness & Feature = 0.5mm or 0.020”
  • Standard Finish = Level 2 Finish with bead blast (available custom finishes)
  • Standard Lead Time = 3-5 days
  • Tolerances = +/- 0.010” for first inch then +/- 0.003” per inch thereafter
  • Inserts = Install in post-processing
  • Holes = Drill, Ream, and Tap (Print threads then chase or ream in finishing)

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I have partnered closely with TTH for over a year, and working with them has been a wonderful experience. Their entire team is always pleasant to work with, their project managers are incredibly knowledgeable, and their attention to quality and timeliness is best in class. I simply cannot recommend them highly enough for any project big or small.

- Jordan G., Additive Manufacturing Professional

Most of my 30 year career has been spent finding vendors that meet my Cost, Service, and Quality requirements. The number of suppliers that can meet those criteria for a sustainable period of time are few. TTH is one of those companies. The management team at TTH is always willing to work with us to improve efficiency and offer solutions that exceed our expectations. If you are looking for a partner, not just a supplier, the team at TTH will not disappoint.

- Tom C., NPI Materials Leader

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