Selective Laser Sintering(SLS)

Industrial 3D printing process that produces functional nylon prototypes and end-use production parts in as fast as 1 day. Make nylon parts starting at only $25!

Overview: How SLS 3D printing works?

The Basics Of SLS 3D Printing

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Selective laser sintering (SLS) is an industrial 3D printing process that produces accurate prototypes and functional production parts in as fast as 1 day. Multiple nylon-based materials are available, which create highly durable final parts. A thin layer of plastic powder is selectively melted by a laser. The parts are built up layer by layer in the powder bed. A laser sintering machine will coat a layer of plastic powder onto a build platform, which is melted by a laser (or multiple lasers). The build platform will then be lowered and the next layer of plastic powder will be laid out on top. By repeating the process of laying out powder and melting where needed, the parts are built up in the powder bed. When the build finishes, the entire powder bed with the encapsulated parts is moved into a breakout station, where it is raised up, and parts are broken out of the bed. An initial brushing is manually administered to remove a majority of loose powder. Parts are then bead blasted to remove any of the remaining residual powder before ultimately reaching the finishing department.

Benefits Of SLS

SLS process is highly beneficial for those who need to produce their plastic parts for prototyping and simulation, or for low-volume production by eliminating time-consuming tooling. With Selective Laser Sintering (SLS), it’s also possible to get thin-walled objects and intricate geometries. Selective Laser Sintering can be used to make parts using a variety of materials, including plastic, metal, ceramic, or glass powder, making it a popular machining process. Selective Laser Sintering (SLS) as other metal 3D printing technologies is appropriate for manufacturing small batches at a reasonable unit costs and a high degree of product customization even in serial production. We have a strong expertise in the production of series with SLS technology. Unlike stereolithography(SLA) and fused deposition modeling (FDM), Selective Laser Sintering (SLS) does not need a separate feeder for support material because the part being constructed is surrounded by unsintered powder at all times, this allows for the construction of previously impossible geometries.

Benefits Of SLS With FacFox

Thanks to our online SLS service, you can have access to professional 3D printers for prototyping and production distantly, and without needing to worry about operating the machines yourself. You’ll get your 3D printed plastic parts, fully functional and ready to be used or integrated into a larger object, within a few days.

MJF vs SLS

MJF

SLS

Features of SLS

Advantages

Strength & Durability

Nylon/Fiber-reinforced material with strong mechanical and durable properties, perfect for end-use parts.

Geometry

SLS allows to integrate multiple components as well as thin-walled objects and intricate geometries that traditional method won’t be capable of.

Efficiency

Designs can be made quickly with a minimum of material waste while maximizing strength and complexity.

Scalable Volume

Multiple, identical parts can be built on a single platform at one time, greatly increasing production efficiency.

Turnaround

SLS 3D printed parts do not require tooling which reduces the manufacturing lead time from weeks to days, allowing for faster innovation and speed to market.

Surface & Detail

SLS has tolerances of +/-.012” or +/-.003” per inch, and feature smallest to 0.1mm

Drawbacks

Material Limits

Now SLS has only Black PA12 nylon material, but we can expect metal and fullcolor plastic material coming soon!

Scale Effect

The unit cost and lead time will not be reduced as much as casted or molded parts.

SLS Processes

Printers & Parameters

– Printers: EOS P760/P396, Farsoon FS403P – Maximal build volume: 700 x 380 x 580 mm – Minimum feature size: 0.15 mm

Restrictions

– Minimum layer thickness: 0.1 mm – Typical surface finish: 5 – 10 microns RA – Accuracy: (+/- 0.1-0.2%)

Pre-build planning

Important decision on design is the orientation and support structures. This depends on: – Geometry, mainly inclination to reduce layer lines. – Areas that need great smoothness or post-processing

Available Materials

Plastics
Elastomer

SLS Nylon (PA12)

SLS Nylon Glassfilled(PA12+GF)

SLS TPU Rubber

SLS TPU Rubber(X92A)

Available Finishes

Default
Other

The finish option with the quickest turnaround. Which normally includes:

Removal of build envelope: The build envelope is removed from the machine
Remove powder: Parts are broken out of the powder cake. Afterwards excess powder is removed from the parts by sand blasting. This is usually straight forward, however might require some extra effort for parts with complex geometric features (e.g. trapped powder)

In addition to the removal of remaining powder, the part surface is media blasted to provide a uniform finish.

Media Polishing
Painting
Dyeing(Only black available for now)
UV Coating
Don’t see the finish you need? Submit an RFQ with ‘Suggest’ option, we’ll look into a finishing process for you.

SLS Applications

Prototypes

With SLS, the prototype can be made using nylon material with great functionality. Fast turnaround makes it a good choice for functional prototyping.

Customized Products

The speed and versatility of SLS let variable production of customized gifts/samples for different users become possible.

Batched Products

SLS can be applied to make high-quality small batched products from 1-10,000 units, ideal for small businesses that wishes to test the market’s reaction to thier newly developed products.

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