Custom manufacturing network providing multi jet fusion (MJF), stereolithography (SLA), PolyJet, selective laser sintering (SLS) and fused deposition modeling (FDM) 3D printing services.We service brands all over the world. Contact us to get your 3D prints completed and see what sets us apart from the rest!
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What Is SLS 3D Printing?

Selective laser sintering (SLS) is a powerful 3D printing technology that belongs to the powder bed fusion process series, which can produce high-precision and durable parts, which can be directly used for end-use, small batch production or prototype prototypes. In the printing process of the SLS equipment, a high-power laser is used to fuse small particles of plastic powder into the required three-dimensional shape. The laser selectively fuse powder materials by scanning the three-dimensional data section on the surface of the powder bed. After scanning each section, the powder bed is reduced by a layer of thickness, a new layer of material is added to it, and the selective laser sintering process is repeated until the part is completed.
SLS 3D printing can be used not only for the prototype design of functional polymer components, but also for small production runs because it has high design freedom, high precision, and produces parts with good and consistent mechanical properties. offers online SLS 3D printing services for rapid prototyping and production in volume. Our clients are across a wide variety of industries and companies, including automotive, construction, aerospace, defense, electronics, machinery, industrial automation, medical, healthcare, consumer production, oil & gas, etc. Accelerate your product development and manufacturing process with our industry-leading metal & plastic SLS 3D printing service and SLS 3D printed parts. We’ll find the best SLS 3D printing solution for your projects, to lower your cost and shorten the lead time based on your needs, while maintaining the quality. From SLS 3D prototyping to end-use parts production, multiple materials are available for custom SLS 3D printing parts. Need an alternative to the traditional solution? Submit your 3D CAD file to get an online quotation quickly. Our SLS 3D printing service ensures accuracy and speed. We can help you choose the most appropriate technology and material to match your applications or request.

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Why Choose SLS 3D Printing Service

PTJ meets or exceeds the quality standards of the world’s most demanding industries with our state of the art equipment and quality standards. Our precision and productivity is made possible by our ultimate success factor: the presence of skillful, knowledgeable PTJ experts in sls 3d printing and more additive manufacturing parts.

SLS 3D Printing Process

SLS printing technology uses powder spreading to spread a layer of powder material on the upper surface of the formed part and heat it to a temperature just below the sintering point of the powder. The control system controls the laser beam to be on the powder layer according to the cross-sectional profile of the layer. Scan upwards to raise the temperature of the powder to the melting point for sintering and bonding with the molded part below After one layer is completed, the workbench drops a layer of thickness, and the spreading roller spreads a layer of uniform and dense powder on it, and sinters the section of the new layer until the entire model is completed.

SLS 3D Printing Process
During the molding process, the unsintered powder supports the cavity and cantilever of the model, so the SLS molded workpiece does not need a support structure like the SLA molded workpiece. Compared with SLA, the materials used in the SLS process are relatively abundant, mainly paraffin, polycarbonate, nylon, slender nylon, synthetic nylon, ceramics and even metal.

When the workpiece is completely formed and completely cooled, the workbench will rise to its original height. At this time, the workpiece needs to be taken out and the powder on the surface of the model needs to be removed using a brush or compressed air.

The SLS process supports a variety of materials, no support structure is required for the formed workpiece, and the material utilization rate is high. Although the price of SLS equipment and the price of materials are still very expensive, the materials need to be preheated before sintering, and the materials will volatilize during the sintering process, and the equipment working environment is relatively demanding.

The Lightweight Design Considerations Of SLS Process

Since SLS does not require supporting materials, parts with hollow parts can be printed easily and accurately.
Because the hollow part uses less material, it can reduce the weight and cost of parts, which is particularly important in aerospace. Therefore, in the design process of the part or the data processing process before printing, it is necessary to consider the powder escape hole to remove the unsintered powder from the inside of the component (supporting during the sintering process). It is recommended to add at least 2 escape holes with a minimum diameter of 5 mm in your design.
If stronger stiffness is required, the part must be completely solid printed. Another option is to make a hollow design, eliminating the need for escape holes. In this way, the tightly packed powder will be trapped in the part, thereby increasing its mass and providing some additional support to resist mechanical loads without affecting manufacturing time. The internal honeycomb grid structure can be added to the hollow interior to further improve the rigidity of the component

The Features of SLS 3D Printing

The main advantage of SLS is that it does not require a supporting structure. The unsintered powder provides all the necessary support for the part. Therefore, SLS can be used to create free geometric shapes. As long as it is within the parameters of the printing process, designers can display their talents as they want without worrying about manufacturing issues.
When using SLS for printing, especially for small batch production, it is very important to make full use of the entire build volume and increase the printing volume ratio (the volume ratio of the printed product in the entire printing chamber). According to the layout requirements of the printed products, after the maximum printing height is determined, it will take approximately the same time to print regardless of the number of printed products in the print control. This is because the powder spreading speed of each layer determines the total printing time (laser scanning occurs very quickly), and the machine will have to cycle through the same number of layers.
Therefore, for a factory doing SLS process 3D printing services, a large number of orders can be used, and the order products can be optimally combined as much as possible for production in the same printing warehouse, which will greatly reduce printing costs and increase printing speed. (Reduce the time to wait for orders and collect orders, and quickly start production). and AI order dispatch and order consolidation system solve this problem well and provide customers with comprehensive solutions with the best cost performance.

The Features of SLS 3D Printing

The Material Of SLS 3D Printing

  1. There are many kinds of materials to choose from, and the price is low. As long as the material has a low viscosity after heating, it can basically be used as a SLS material. Including polymers, metals, ceramics, gypsum, nylon and other powder materials.
  2. The process is relatively simple. According to different materials, this process can directly produce complex-shaped prototypes, three-dimensional construction of cavity molds or parts and tools.
  3. No supporting structure is required. The unsintered powder can be used as a support structure.
  4. The material utilization rate is high, because there is no supporting structure and base, all materials can be used.
  5. High precision. Generally affected by factors such as the type of powder and the size of the powder particles, the accuracy is generally between 0.05mm-2.5mm.
  6. Low deformation rate

Compared With SLA, What Are The Advantages Of SLS 3DP

Advantages And Disadvantages Of SLS 3D Printing

Main Advantage:
Main Disadvantages: SLS Case Studies

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Free 3D Printing Quote Process
Upload drawing files (PDF, DXF, IGES, STEP). You can easily register multiple drawings at once with the drawing file batch registration (EDI).
  • * Supports drawing uploads in file formats “.pdf”, “.jpg”, and “.png”.
  • * Supports file uploading and loading of 3D (3D) CAD data “.igs” and “.step”.
  • * Supports file uploading of two-dimensional (2D) CAD data “.dxf” and “.dwg”.
Quotation confirmation / order The shortest estimate from drawing data. Check the quotation on a PC etc. and place an order (order). * Estimates can be confirmed from the member-only management screen (PC, smartphone, tablet).
Started 3D Printing/Rapid Prototyping and production After accepting the request, Rapid Prototyping and manufacturing work is started by a specialist in 3D Printing,Cnc Machining, prototyping, and equipment. You can monitor the progress from your PC, smartphone, tablet, etc.
Finished product inspection / shipping Processing and production completed. After a strict check, we will promptly deliver to the designated delivery destination. Please look forward to the arrival of the finished product.
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