Selective laser sintering is a 3D printing technology. It uses a high-power laser to fuse material particles into solid objects in complex layers. This process creates complex functional parts with high accuracy and exceptional properties. Various industries utilize SLS for rapid prototyping and creating functional prototypes for testing and evaluation, for example, commercial aerospace, automotive, manufacturing, and healthcare). The ability to work with a wide range of materials and the capability to produce intricate geometries make this versatile solution a valuable technology in the field of additive manufacturing.
Advantages of using selective laser sintering
Resourceful
Selective Laser Sintering offers material versatility which allows it to have a varied application and end-use requirements. Moreover, it enables the creation of lightweight, hollow, or porous structures, expanding design possibilities.
Fine printing, accuracy, and customization
SLS can create objects with intricate shapes with high dimensional accuracy, reducing the need for post-processing. It produces features that are difficult or impossible to produce with other methods.
Wide material range and durability
The parts of this type of printing are known for their strength and durability, making them suitable for functional applications. They have excellent mechanical properties that include heat, chemical, and corrosion resistance making them suitable for prototype creation across a wide range of applications and conditions. Additionally, SLS can use various materials including nylon, plastics, metals, and ceramics, offering flexibility in part properties.
Brands that offer selective laser sintering printer solutions EOS
A German company known for its high-quality SLS printers, EOS offers EOS P396 and EOS M 400. Their EOSINT series offers a range of machines suitable for various applications, from prototyping to production.
Markedforged
An American company that produces the Markforged X7, a hybrid SLS printer that combines SLS with continuous fiber reinforcement. These reinforced parts are capable of replacing machine aluminum. Energy absorbance, chemical and flame resistance, and high resolutions are some of its key features.
Process overview
The SLS printing process varies with the material selection and conditions of printing. However, the five general steps are:
Preparation
CAD software creates a 3D model of the object in the beginning which is then cut into thin layers.
Powder Disposition
A bed of fine powder material, typically nylon or plastic is spread evenly across the build platform
Laser sintering
A high-power laser selectively scans each layer of the model, fusing the powder particles where the object is to be formed. The laser follows the contours of each layer, creating a solid structure.
Part building
The build platform lowers slightly after each layer is sintered, and a new layer of powder is deposited. This process repeats until the entire object is complete.
Post-processing
Once the object is printed, it is removed from the powder bed. Excess powder is removed, and the part may undergo additional finishing or post-processing steps, such as curing or dyeing.