Synonyms and Working Principle
Multi Jet Fusion (MJF) is a powder bed fusion technology that builds up the manufactured parts layer-by-layer. As a first step, a thin layer of thermoplastic powder is distributed by a moveable unit. Another movable unit, moving in the orthogonal direction, is equipped with two infrared lamps and a dosing system for the agents to be distributed on the powder bed. The first lamp preheats the powder bed to just below the melting point. The fusing and detailing agents are then applied. Finally, another fusing lamp is attached to this moving unit, which fuses the powder to the underlying layer where the fusing agent was applied before. This fusing agent increases the absorption of the material for infrared radiation and ultimately causes the grayish discoloration of the components. The detailing agent evaporates during this process and ensures that no surrounding powder melts onto the contour. This ensures sharp edges and dimensional accuracy. This process begins again for the next layer. The unused powder can partially be reused for the next cycle of production.
Advantages of MJF
Multi Jet Fusion is a very accurate manufacturing technology with short building times as well as high output in terms of volume. This additive manufacturing technology has low cost per part and does not need an energy-consuming laser. Moreover, the unused powder can be recycled and then reused for the next production process.
MJF Use cases
Multi Jet Fusion is usually used for prototypes and functional prototypes. MJF is especially suitable for prototypes that require good mechanical properties (e.g. prototypes for injection molding parts) and are capable of functional testing. It is also capable of producing high-quality end-use parts. Here, one common specific use case is orthotics and prosthetics since most of the used materials are biocompatible. Also, for processes for functional parts with smaller quantities MJF is commonly used.
Our offered materials for MJF
An elongation at break up to 40 % (depending on build direction) combined with a high impact resistance makes PA 11 in MJF an highly attractive option for mechanically stressed parts. The material is made out of a renewable raw material and is biocompatible, which means that it is approved for skin contact, for example.
Mechanically stressed parts where high ductility is needed. Typical use cases are functional prototypes or lower limb prosthetics.
PA12 can be well processed in the Multi Jet Fusion process with attractive costs as well as a high reusability of already used powder. Components also have attractive mechanical properties and provide chemical resistance e.g. against oils and greases, which makes it suitable for functional parts.
Typical use cases are functional prototyping or printing of prosthetics and orthotics.
TPU allows flexible elastomeric parts to be produced with the advantages of the MJF process. Whenever high elasticity or shock absorption with high design freedom is required, this material-process combination is ideal.
TPU is often used for robotic clamps or elastic covers and folding bellows. Another specific use case is for energy absorbing parts like they are usually used to prevent accidents, like a helmet.
Did not find the material you are looking for?
We are constantly expanding and you can request specific materials going beyond our current standardized offering. Simply select “Other Material” in the order process and provide us your desired specifications in the comment section.
You can also reach out to us with your specific material requests at any time under firstname.lastname@example.org