Multi Jet Fusion (MJF)

Although new products continually emerge within additive manufacturing, outpacing the power of the original 3D printing systems developed in the mid-80s is still a challenging feat. Enter the mighty technology known as Multi Jet Fusion (MJF) though–built on the benefits and premises of previous conventional and 3D printing technologies.

3D Printing Speed, Quality, and Customization

Relatively new, unveiled by HP in 2016, Multi Jet Fusion 3D printing stands apart due to its capacity for powerful production. MJF runs neck and neck with Selective Laser Sintering (SLS) technology but is not reliant on laser heat, and adhesion is not based on glue. Instead, one layer of powder is deposited onto the next, 80 microns at a time, as an inkjet array goes back and forth, separately releasing fusing and detailing agents onto the powder.

Thermal heat melts the layers together completely, resulting in faster production, and greater output in comparison to other popular methods like Fused Filament Fabrication (FFF) or SLS. Parts are well-defined with more stable mechanical properties and sophisticated interlocking parts can be printed in one piece without any need for post assembly. While size is limited to the volume of the printer, many different pieces can be printed in each build--nested horizontally and vertically--and then fitted together later if necessary.

Multi Jet Fusion Offers Many Impressive Advantages

MJF 3D printing offers remarkable new opportunities for manufacturing prototypes but more so with quality end-use parts, due to the following features:

  • Mechanical properties are more consistent due to the comprehensive printing process.
  • The advanced standalone cooling system results in less warping, shrinking, and failure in   parts—even more important as MJF 3D printing is often designed for end-use applications.
  • Support structures are not necessary as unfused powder stabilizes parts during MJF 3D printing. This further enhances the level of customization and design freedom available for end-use parts.
  • Fewer limitations in design with MJF due to the integrity of the technology and materials leaves designers free to make complex structures that can be produced quickly whether they are prototyping or manufacturing final products.
  • Streamlined production overall and improved turnaround are the result of faster speed, faster cooling, and greater efficiency in post-processing.

Materials & Applications

Flexibility and strength, as well as stiffness, are common requirements for 3D printing materials. Whether exploring SLS 3D printing or MJF 3D printing processes, these features are present; however, MJF PA12 and MJF Plastic PA12 Glass Beads surpass what is offered for SLS 3D printing in some ways, along with the highly popular thermoplastic Polypropylene (PP).

MJF PA12

This material is commonly relied on for superior strength and elasticity, making it suitable for highly functional parts. MJF PA12 parts are also chemical- and water-resistant.

Because of its outstanding flexibility, MJF PA12 is suited for applications like:

  • Mechanical and structural components
  • Architectural designs and home decor
  • Drone parts
  • Fixtures
  • Eye frames
  • Jewelry
  • Prosthetics

 

Explore the design guidelines for MJF PA12

MJF Plastic PA12 Glass Beads

This unique material is filled with 40% glass beads, offering superior stiffness, and also helping to prevent warping in larger or flatter parts. MJF PA12GB is also used for applications that require great strength, to include:

  • Tooling
  • Robotics
  • Drones
  • Medical braces
  • Housings and cases

 

Explore design guidelines for MJF PA12GB

Polypropylene (PP)

This material is also offered for 3D printing with MJF technology. Ideal for a wide range of products, PP offers superior resistance to chemicals, low-moisture absorption, and is extremely durable for long-term use. HP High Reusability PP enabled by BASF is ideal for applications like piping, fluid systems, and containers. 

Other good examples of products made with PP include:

  • Medical devices like braces or respirator equipment
  • Prototypes for automotive test applications
  • Electronic devices

 

Explore design guidelines for Polypropylene (PP)

Why Shapeways Customers Select Multi Jet Fusion

Shapeways customers select MJF 3D printing for robust prototypes and parts with excellent mechanical properties, along with the ability to manufacture complex structures that require advanced technology. Ordering and manufacturing is streamlined, to include instant quotes, analysis for printability, and options for speed in manufacturing depending on budget and priority.

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