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What’s the Difference Between SLS and MJF in 3D Printing?
Selective Laser Sintering (SLS) and Multi Jet Fusion (MJF) are technologies commonly used by design engineers, product designers, and other professionals. Each has unique characteristics that make it suitable for different applications. In this article, we will explore the key differences between these two processes and their advantages and disadvantages to help you decide when to use one over the other.
SLS vs MJF: A Basic Overview
Selective Laser Sintering (SLS) is a 3D printing process that uses a laser to sinter powdered material layer by layer. The laser selectively fuses powdered particles, allowing the creation of intricate, durable components without the need for support structures.
Multi Jet Fusion (MJF), on the other hand, uses an inkjet array to apply fusing and detailing agents across a bed of powdered material. Heat is applied to fuse the material, and this process continues layer by layer, similar to SLS, but with a different mechanism for bonding the material.
Pros and Cons of SLS
Advantages of SLS
Material Versatility: SLS is compatible with a wide range of materials, including PA 2200 Carbon Reduced Performance, a sustainable material offered by Prototype Projects.
Detailed Features: SLS can produce fine details and high resolution, making it useful for applications where feature definition is critical.
No Support Structures Required: Parts can be printed without the need for additional support structures, allowing for more complex geometries.
Durability: The parts produced using SLS tend to be strong and durable, making them ideal for functional prototypes and end-use applications.
Cost-Effective for Small Runs: SLS is well-suited for low-volume production runs and prototypes, making it more economical in such cases.
Disadvantages of SLS
Surface Finish: Parts produced through SLS often have a slightly rough surface finish, which may require post-processing for applications demanding smoother surfaces.
Longer Build Times: Due to the laser-based sintering process, SLS can take longer to complete prints compared to other methods.
Pros and Cons of MJF
Advantages of MJF
Fast Production: MJF is known for its quick build speeds, making it a preferred choice for high-volume production.
Consistent Mechanical Properties: MJF typically provides parts with consistent mechanical properties across the build, which can be crucial for certain functional components.
Disadvantages of MJF
Limited Material Options: While MJF offers high performance, the range of available materials is more limited compared to SLS.
Cost for Smaller Runs: MJF may not be as cost-effective as SLS for low-volume runs or prototypes due to higher initial machine costs.
Post-Processing Required: Parts produced using MJF may require post-processing for optimised surface finish, similar to SLS.
Surface Finish: Parts produced through SLS often have a slightly rough surface finish, which may require post-processing for applications demanding smoother surfaces.
Applications and When to Use Each Process
SLS is often the preferred method for functional prototypes and low-volume production of parts requiring mechanical strength and complex geometries. It excels in the production of durable components such as enclosures, brackets, and automotive parts, particularly when cost and sustainability are important factors. If your project requires a more eco-friendly material, Prototype Projects’ offering of PA 2200 Carbon Reduced Performance is an excellent choice, contributing to both strong and environmentally responsible production.
With its speed, MJF is typically used in applications where fast turnaround times are critical, such as rapid prototyping and higher-volume production. Its ability to produce parts with consistent mechanical properties makes it suitable for industries like aerospace and healthcare, where part performance is key.
Choosing the Right Technology
The choice between SLS and MJF ultimately depends on your specific project requirements. If your priority is mechanical durability, and eco-conscious production, SLS may be the best fit. On the other hand, if you require fast production, MJF might be more appropriate.
As we specialise in SLS, we’re well-equipped to guide you in using this robust technology to meet your design and production needs.
Talk to us
To discuss if SLS is the right technology for your project, please contact us on 01763 249760 and we can answer your questions. You can also request a quote via our website.