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Selective Laser Sintering Definition
SLS 3D Printing (Stereo Laser Sintering) makes use of a high power optic laser that fuses small powder particles layer by layer to produce complex and durable geometric parts.

SLS 3D Printing has become a popular way for engineering and manufacturing.

Specification of SLS 3D Printing
Item NameSelective Laser Sintering (SLS)
Working Platform Size360X360x600mm
Maximum Build SizeUp to 320 x 320 x 580 mm
MaterialThermoplastic (nylon 11,12 ,etc.) PEEK,etc.
Lead Time3-5days
Dimensional Accuracy± 0.3% with a lower limit of ± 0.3 mm (± 0.012)
Layer Thickness80-100μm
Applicationmedical, dental, rapid prototyping, architecture, etc.

Advantages of SLS 3D Printing

1. Multiple materials choice and high rate of utilization.
2. Vey short production cycle only takes around 3 days completion.
3. SLS 3D Printing part has strong mechanical properties.
4. Temperature resistance, chemical resistance, abrasion resistance.
With its excellent mechanical properties, best for functional prototyping and end-use production.

Selective Laser Sintering Working Principle

Printing: The powder is dispersed in a thin layer on top of a platform inside of the build chamber. The printer preheats the powder to a temperature somewhat below the melting point of the raw material, which makes it easier for the laser to raise the temperature of specific regions of the powder bed as it traces the model to solidify a part. The laser scans a cross-section of the 3D model, heating the powder to just below or right at the melting point of the material. This fuses the particles together mechanically to create one solid part. The unfused powder supports the part during printing and eliminates the need for dedicated support structures. The platform then lowers by one layer into the build chamber, typically between 50 to 200 microns, and the process repeats for each layer until parts are complete.

Cooling: After printing, the build chamber needs to slightly cool down inside the print enclosure and then outside the printer to ensure optimal mechanical properties and avoid warping in parts.

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