SLS 3D Printing Process - Aurum3D
                     SLS 3D Priintiing Process
You can produce solid three-dimensional objects from digital three-
dimensional models using various 3D printing technologies. Each 3D 
printing technology produces the three-dimensional object physically 
by processing and curing the filament in a specific way. Selective 
laser sintering (SLS) 3D printing technology forms the solid structure 
by sintering powdered materials using a high-power laser.
The use of laser as the power source makes SLS different from other widely 
used 3D printing technologies like Fused Deposition Modeling (FDM) and 
Stereolithography (SLA). You can opt for SLS as a fast and inexpensive 3D 
printing technology. You can produce parts and prototypes with high-level 
strength, stiffness, resolution, and dimensional accuracy through the SLS 3D 
printing process.
Also, you have the option to create structures using a variety of powdered 
materials, including nylon and thermoplastic polymers. But you must 
understand the key steps in the SLS 3D printing process to produce the item 
that meets your requirements precisely. Also, you should adopt a slew of best 
practices to streamline and boost the SLS 3D printing process.
3  IImportant  Steps  iin  SLS  3D  Priintiing  
Process
As the name suggests, SLS 3D printing technology forms solid parts, 
prototypes, models, and structures by sintering powdered material 
selectively using a laser as the power source. The high-power laser produces 
the solid three-dimensional object from the CAD file by fusing the powdered 
plastic filament. But the solid structure is formed through a series of steps in 
the SLS 3D printing process – printing, cooling, and post-processing.
1. Printing
Before the printing process starts, the SLS 3D printer disperses thin layers of 
the powdered material into the build chamber. It further preheats the 
powdered material in the build chamber up to the pre-melting temperature 
level. The laser scans the preheated material and heats it to the melting 
point according to the CAD file.
The fused particles create the solid structure mechanically, while the unfused 
material provides support to the 3D-printed structure. Hence, SLS 3D printing 
technology does not require you to use a support structure. The 3D printer 
repeats the process and forms the solid part by fusing the powdered material 
layer by layer.
1.. Coolliing
The item formed through the fusion of particles must cool down properly to 
retain mechanical properties and avoid warping. That is why; you must cool 
down the build chamber adequately after the SLS 3D printing process. You 
should not remove the finished part from the build camber immediately after 
the printing process.
Postt--Prrocessiing
After removing the finished part from the build chamber, you need to 
enhance its look, feel, and feature by removing and cleaning excess material. 
Some parts produced using SLS 3D printing technologies need post-
processing using media tumbling or media blasting techniques. You can 
recycle the unfused and excess materials to curtail overall material 
consumption and wastage.
3D  Nesttiing  Bestt  IIdeas  tto  Boostt  SLS  3D  Prriinttiing  
Prrocess
According to Fraunhofer SCAI, “3D Nesting is about arranging objects as well 
as possible in cuboid containers. The objects themselves do not have to be 
cuboids but can be objects of any complexity. An important field of 
application is 3D printing, in particular, printing processes without support 
structures such as SLS: here the objects to be printed can usually be placed 
in the entire print chamber.”
You can easily boost the SLS 3D printing process by leveraging 3D nesting 
techniques. The 3D nesting technique helps you increase the quality and 
volume of 3D-printed items, along with curtailing overall printing time and 
cost. You can adopt a slew of 3D nesting best practices to place multiple 
parts in the build chamber accurately during the SLS 3D printing process.
Pllacementt  off  IIttems
The shape and quality of the 3D-
printed object are impacted adversely Often beginners increase material 
when you move them towards the consumption and printing time by 
corner. The placement increases the ignoring the position of items in the 
chances of the build chamber heat chamber. But experienced 
remaining under-heated. You must printers always position the items 
print the part in the center to keep its flat on the print bed. The positioning 
quality intact by maintaining heating ensures proper heating along with 
Ysotaub icliatyn. print items of varying sizes accelerating the SLS 3D printing 
during a single SLS 3D printing pUropcwesasr.d Facing Position
process. But you can boost the While printing items with open 
quality of individual items only by sides, you must make the open 
arranging them properly. It is sides face up. As the open sides 
advisable to place bigger items in the face upward, it becomes easier to 
center of the build chamber while control heating. Also, the open side 
moving the smaller items to the accelerates the printing process by 
chamber’s edge. The arrangement providing the parts with a 
will help you to control heating temperature outlet. However, you 
throughout the printing process. need to ensure that the open side 
of one item does not close or cover 
others
Cage Structure Support
You should consider using a cage structure while printing multiple and small 
parts with varying elements. You can create the cage structure using a 3D 
printer. The cage structure will make it easier for you to separate and clean 
the items more accurately at the post-processing stage. Also, you can 
mitigate errors while assigning specific parts to individual projects before 
dIne laivdedriyt.ion to curtailing overall 3D printing time and costs, SLS technology 
enables you to produce robust parts, models, products, and models with high 
dimensional accuracy. But you must remember that SLS, like 
other widely used 3D printing technologies, has several shortcomings. Hence, 
you must focus on streamlining and boosting the SLS 3D printing process by 
implementing a slew of nesting best practices.
About Aurum3D
We are amongst the major 3D printing service providers in Bangalore, India. 
We have been providing FDM, SLA and custom SLS 3D printing services to 
many major industries. Please feel free to get in touch with us for your 
custom needs, our 3D printing solutions experts will get back to you within 
one business day.

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