Multi Jet Fusion(MJF) 3D Printing

Multi Jet Fusion (MJF) is an advanced 3D printing process that can speedily produce accurate, complex and detailed parts from powdered thermoplastics. MJF parts have high tensile strength and fine feature resolution, making them perfect for complex industrial parts. Developed by HP, this relatively new 3D printing technology is perfect for creating functional prototyping and production parts with isotropic mechanical properties, making it a go-to for any application requiring geometric complexity and impressive cosmetic and mechanical properties.

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MJF (Multi Jet Fusion) capabilities

Maximum build size	Standard lead time	Dimensional accuracy	Layer height	Minimum feature size
380 × 284 × 380 mm	From 1 business days	± 0.3% with a lower limit of ± 0.3 mm (± 0.012 in)	80μm	0.5 mm

Description
Additional information

MJF 3D printing uses strong, versatile materials

Leading companies across many industries use MJF for its industrial-grade materials

Material	Color	Resolution	Tensile strength	Elongation at break	Heat deflection temperature	Application
HP PA 12 (Nylon 12)	Gray, dyed black	80μm	48 MPa	15-20 %	95-175 °C	Functional prototypes, complex assemblies, watertight applications
Glass-filled HP PA 12	Gray, dyed black	80μm	30 MPa	6.5 %	121-173 °C	Enclosures, housings, cases, fixtures, structural parts, tooling
HP PA 11(Nylon 11)	Gray, dyed black	80μm	54 MPa	40%	54-185 °C	prostheses, insoles, sports goods, snap fits, living hinges
BASF TPU	Gray, dyed black	80μm	9MPa	310%	84°C	Wearable devices, tooling fixtures, hoses, shoe midsoles, lattice structures
BASF PP	Gray, dyed black	80μm	29MPa	20%	60-100°C	Corrosion-resistant,watertight applications, oil tank

How MJF stacks up against other 3D printing technologies

	Materials	Price	Dimensional accuracy	Strengths	Build volume	Layer thickness	Min. feature size
FDM	2	$	± 0.5% with a lower limit on ± 0.5 mm	Low cost, wide range of materials	500 x 500 x 500 mm (19.68" x 19.68" x 19.68")	100-300μm	2.0 mm (0.0787’')
Industrial FDM	6	$$$	± 0.3% with a lower limit of ± 0.3 mm (± 0.012")	High level of repeatability, engineering grade materials	914 x 610 x 914 mm (35.98” x 24.01” x 35.98")	100-330μm	2.0 mm (0.0787”)
Industrial SLA	3	$	± 0.2% with a lower limit of ± 0.13 mm (± 0.005")	Smooth surface finish, fine feature details, big print area	1000 x 1000 x 600 mm (39.37" x 39.37" x 23.62")	50-100μm	0.5 mm (0.00196”)
SLS	2	$$	± 0.3% with a lower limit of ± 0.3 mm (± 0.012”)	Design flexibility, supports not required	680 x 380 x 550 mm (26.77" x 14.96" x 21.65")	100μm	0.8 mm (0.0314”)
MJF	5	$$	± 0.3% with a lower limit on ± 0.3 mm (0.012’')	Design flexibility, supports not required	380 x 285 x 380 mm (14.9" x 11.2" x 14.9" )	80μm	0.5 mm (0.0196”)
SLM	3	$$$	± 0.2% with a lower limit of ± 0.2 mm (± 0.00787 in)	Produces a variety of metal material parts with high strength and high temperature resistance	420 × 420 × 450 mm(16.54" x16.54" x17.72" )	50μm	0.8 mm(0.0314)

Cooling

This takes place within the build unit, though HP offers module units for natural cooling, so the build unit can be used for a new print without having to wait for the powder and part to cool.

Recovering unfused powder

Once the build unit has cooled down, move it to the processing station and vacuum the unfused powder into a container for later use.

Bead blasting

Remove any remaining powder with bead blasting, air blasting or water blasting. You can do this manually or automatically, using a tumbler, ultrasonic cleaner or vibratory finishing machine.