FDM and PolyJet: professional 3D printing technologies
Choices and decisions. In life, we are constantly faced with choices between possible solutions. This is no different in the world of 3D printing. Both Fused Deposition Modeling (FDM) and PolyJet technologies have unique characteristics and special advantages.
How do you know which technology is right for your parts? To better understand the options, it is important to understand the processes involved.
FDM . uses a thermoplastic polymer base material that is melted by the machine and the melt is continuously and precisely deposited, a process called extrusion. After extrusion, the material solidifies immediately
The PolyJetprocess is similar to traditional inkjet printing, except that it doesn’t lay down the “drops” in a single layer, but rather in layers on top of each other. The droplets are made of a special polymer material that hardens when exposed to UV light. These are called photopolymers. Once a layer is created, the machine creates additional layers and repeats the process until the part is complete.
FDM and PolyJet manufacturing technologies are different, so the properties of the finished products will also be different. Here are some things to consider when choosing the right technology:
Application area – what will the component be used for?
PolyJet technology allows you to create lifelike, colorful parts, making it a great choice for concept models.
While PolyJet is known for its detail, FDM focuses on producing durable, end-use parts. If mechanical strength and durability are key to the part, FDM is the best choice.
Raw material
If the detail of the part is particularly important, then PolyJet technology is worth choosing. It can be used to create even the most complex colored textures. Do you need elements with different material properties within one element? Thanks to PolyJet technology, it is also possible to print parts with various flexibility, from rubber-like parts to hard plastics.
Fused Deposition Modeling (FDM) technology allows for a wide range of materials to be used. The finished product is robust and resistant to extreme conditions and chemicals.
Surface quality – how important is the surface quality of the finished pieces?
It is usually determined by the method of use. In the case of concept models and some prototypes, surface treatment and aesthetics can be of fundamental importance. VARINEX Zrt. employees will always recommend the optimal solution to customers based on 25 years of experience!
Although FDM does not provide the same level of detail as PolyJet, it can still create parts with complex geometries and intricate assemblies. Parts created using the FDM process have visible layers, but these do not affect the strength or functionality of the part.
Component size
Part size is also a consideration when choosing a technology. PolyJet and FDM offer similar maximum build volumes: PolyJet parts can have a maximum size of 998 x 797 x 497 mm, while FDM parts can have a maximum size of 914 x 609 x 914 mm.
FDM technology can be used to create parts of any size. If the part size exceeds the above, the part can be cut up and the individual pieces can be manufactured separately. These can be later joined together, the finished product will be as strong and functional as if it were a single part.
Both technologies have their advantages. Ultimately, the intended use of the part will determine the 3D printing process that you can use. If you need high-resolution, extremely fine parts, PolyJet is a great choice. If durability and the ability of the product to function in extreme conditions are important, FDM is the way to go!
FDM and PolyJet technology from 3D printing pioneers
Being a member of the family that invented FDM technology means that we are supported by Stratasys’ strong commitment to research and development. VARINEX Zrt. has 25 years of experience in the field of 3D printing services, i.e. contract printing. Our engineering colleagues, who use FDM and PolyJet technologies on a daily basis, are able to fulfill customer orders at the highest level. The experience gained from contract printing tens of thousands of different parts per year ensures the right choice between FDM and PolyJet technology for the given application area.
Before starting a project, contact our expert engineering colleagues 3dp@varinex.hu !