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3D PRINTING SERVICES

Multi Jet Fusion (MJF)

At a glance

LifecycleLead TimeResolutionInfillMaterials
Bridge production (10 – 1,000 units) Late stage functional prototypingAs fast as 3 days0.08 mm100% (solid)Nylon

3D Printing Materials

Design Recommendations

 

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8 mm (0.03 in)
0.5 mm (0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill)
152 x 394 mm [d,h] (lathe)
Square profile, full radius, dovetail profiles
Depth must not exceed 12x drill bit diameter.
For end mills, depth must not exceed 10x tool diameter.

Additional Design for Manufacturing Tips

  • No internal cavities
  • Limit curved surfaces, especially for PLA and PET-G as they require a flat surface to result in a successful print
  • Orientation on small holes is very important (xy plane is much more cylindrical)
  • Bridging: distances of up to 10 mm do not necessarily need support material, as long as the area being printed has support on both sides of the material being laid down.

Cost Saving Tips

  • Cut large models into multiple smaller parts, to fit on a smaller, less expensive machines.
  • Reduce the amount of support material required by overhangs and special orientations.
  • Choose PLA for simple geometry parts and where tolerance is less important.

Finishing Options

 

Name

Applicable Materials

Colors

Applications

Texture

Vapor Smoothing
PA 12 Glass Beads
While vapor smoothing itself does not apply a color to the part, it makes the colors of the part more vibrant — so black dyed parts become a deeper, glossier black. Note that gray (raw) MJF parts will turn a near-black if vapor smoothed, as the gray surface melts into the black interior of the part during the process
Enhanced cosmetic appearance, improved mechanical properties
 
Smooth and glossy
 

About the Process

Multi Jet Fusion, or MJF, is a cutting edge 3D printing technology from HP that helps companies accelerate time to market with production-grade 3D printing.

The technology works by spreading out a fine layer of powder, depositing a fluid in the desired locations, and then fusing those areas. The raw powder acts as support for the parts within the build bed. Once the parts are complete, they are cooled, cleaned, and media blasted for a smoother surface finish.

MJF is ideal for bridge production quantities in the hundreds, given that the daily output is comparatively higher than other 3D printing technologies. It’s also great for functional testing and form/fit validation because of its high resolution and excellent tensile strength and heat deflection. It can even produce end-use parts and is a great transition into injection molding, since MJF parts have homogenous mechanical properties.

MJF is a versatile process leveraged by a broad range of industries including healthcare, automotive, and consumer electronics. Some common applications include prosthetics, aerospace camera enclosures, dental molds, and automotive component molds.

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