What If you could design a complicated, complete part without investing heavily in costly tooling? That’s why many businesses are turning to SLS 3D Printing for prototyping, product development and low-volume production.
Selective Laser Sintering (SLS) is a technology that fuses polymer powder layer by layer with a laser, producing complex and strong parts without the need for traditional support structures. Therefore, this technology is well suited to functional prototypes and complex parts.
But the SLS pricing is not only determined by material volume. The final cost can be affected by part geometry, material selection, build utilization, quantity, finishing, and design requirements. By understanding these factors and working with a selective laser sintering 3D printing service provider, businesses can make informed decisions.
What Determines the Cost of SLS 3D Printing?
There is no fixed price for an SLS component. The cost of two parts fabricated from the same material may differ due to size, geometry, quantity, or processing requirements.
1. Material Selection
“Material is one of the significant cost factors.” Engineering polymers are commonly used in SLS because they offer a combination of strength, durability, and dimensional properties.
The SLS material options offered by Cubein include PA12 and PA12 + GF30, enabling manufacturers to choose the appropriate materials for their components based on their functional needs.
For functional prototypes and components, PA12 can be used, and for applications demanding improved material properties, glass-fibre-reinforced PA12 is suitable.
The objective should not simply be to select the least expensive material. Instead, choose one that provides the desired performance without extra expense.
2. Part Size and Volume
The larger the part, the more material and build space it may require. However, SLS economics also depend on how efficiently available build capacity is used.
For businesses that need multiple parts, batch production can be beneficial as several smaller components can be created within the same build.
This means it can be more useful to evaluate the cost of a complete production run rather than focusing only on the price of one component.
3. Part Geometry
Complex geometries are one of the key advantages of SLS, but they can still influence manufacturing efficiency.
The intricate internal features, thin walls, small clearances and complicated shapes should be designed according to the capabilities of the SLS process. Meanwhile, SLS can also be used to manufacture geometries that are difficult or costly to produce using traditional methods.
Rather than simply replicating traditionally manufactured designs, engineers can use the design freedom offered by SLS to produce lighter, more integrated parts.
4. Build Utilization
The placement of parts in the build volume can affect production economics.
Efficiently arranging multiple suitable components can help businesses maximise available build capacity. This is especially helpful when a product development team requires several prototypes, variants or small production runs.
The key is effective part arrangement and production planning, and an experienced SLS 3D printing company can help optimise those points to improve the build efficiency.
5. Production Quantity
Manufacturing economics are directly affected by production quantity.
Making one prototype isn’t the same as making dozens of parts. When producing multiple components, it may be advantageous to combine the appropriate parts into a single production batch to improve efficiency.
SLS is especially beneficial in low volume manufacturing, as it does not require the same degree of tooling as many traditional manufacturing processes. This enables businesses to produce smaller quantities without committing to high volume production.
6. Post-Processing
The printing process is only one part of the overall manufacturing cost.
In some applications, components made by SLS may need powder removal and further surface treatment. For suitable applications, 3D prototyping companies such as Cubein provide post-processing options including surface improvement, dyeing, sealing and coating.
The required finish should be determined according to the purpose of the component. The prototype used for functional testing may not require the same cosmetic finish as a customer-facing prototype.
7. Design and Engineering Requirements
The cost of an SLS project can also include design preparation and engineering work.
CAD files may be reviewed for manufacturability, wall thickness, clearances, dimensions and other design considerations. This preparation can be important during product development because it helps identify potential problems prior to production.
Cubein’s rapid prototyping services encompass engineering-driven development, as well as CAE and simulation-based validation, enabling businesses to assess designs before proceeding further into production.
5 Practical Tips to Optimise SLS 3D Printing Cost
When it comes to reducing costs, it’s not about sacrificing the quality of the final product. The goal is to reduce unnecessary costs while retaining the features and keep the features that are important.
1. Optimise the Design
Examine the design before production. Cut down the excess material, avoid oversized sections, and use lightweight structures, where suitable.
Using SLS, engineers are able to reimagine conventional designs and experiment with intricate structures that can save material while still performing their desired functions.
2. Select the Right Material
Select the material based on the actual requirements of the application.
Consider mechanical loads, durability, environmental aspects, dimensional requirements, and the intended application. If PA12 is suitable, the additional performance offered by a reinforced material may not justify the extra cost. However, the reinforced option might be worth selecting if enhanced performance is desired.
3. Consolidate Components
Consider the assembly as a whole rather than focusing on individual components.
Several components can be consolidated into a single part where appropriate. This can reduce the number of components that need to be produced and assembled.
Part consolidation is especially beneficial for functional prototypes and specialised parts due to the ability of SLS to produce complex geometries.
4. Plan Batch Production
If you need multiple parts, consider ordering them together instead of ordering multiple parts over time.
Batch production can improve build utilization and is particularly beneficial for organizations that have multiple design iterations, product variants or short production runs.
5. Avoid Unnecessary Finishing
Not all parts require a high-quality surface finish.
If you are testing for internal purposes, additional cosmetic finishing may not provide significant value. However, a specific finish might be required for customer-facing or production-intent parts.
Determine the purpose of the part before choosing the finishing level.
When Should You Consider SLS 3D Printing?
SLS offers significant advantages for applications involving complex geometries, functional parts, and rapidly changing designs or for small production runs.
It can be particularly relevant for:
- Complex functional prototypes that are difficult to manufacture using conventional methods.
- Durable polymer components for testing and validation
- Rapid design changes without investment in tooling
- Low volume production and short production runs.
- Geometrically complicated parts with low weight
- Functional engineering-polymer parts
- Several parts that can be easily manufactured in a single build
SLS is not necessarily the best option for every project. If production volumes are high, specific surface finishes are required, or specialised materials are needed, another manufacturing process may be more appropriate. The choice depends on the component’s functions, geometry, production quantity, material requirements, desired finish and the production schedule.
Furthermore, the global additive manufacturing market is expanding, with a projected growth rate of 23.9% and an estimated value of $168.9 billion by 2033. This growth is not an indication that the cost of SLS will always be lower than the cost of conventional manufacturing. Rather, it shows how manufacturers are considering additive manufacturing for flexible manufacturing, quick development, and customised applications.
Conclusion
The cost of SLS 3D printing depends on much more than the quantity of powder used. The final cost depends on material selection, part geometry, build utilisation, production volume, finishing and engineering requirements. Thus, the best strategy is to optimize the entire manufacturing process.
The benefits of SLS 3D printing can extend beyond the part itself, particularly when companies need functional prototypes or low-volume production.
Cubein, your trusted SLS 3D printing company, integrates rapid prototyping, SLS 3D printing, low-volume manufacturing, and engineering, empowering businesses to turn digital ideas into tangible parts. When considering SLS for your next prototype or production run, first review the CAD design, quantity, application and material requirements, and at Cubein, we help you with the entire process.
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FAQs
1. What are the factors influencing the cost of SLS 3D printing?
The final cost can be affected by material, part size, geometry, build utilization, quantity, post-processing, and engineering requirements.
2. What are some of the limitations of SLS 3D printing?
While SLS may be more expensive per part, the tooling, assembly and prototype development costs may be lower in some applications.
3. What are some ways to lower the cost of using SLS 3D printing?
Optimise the design, choose materials based on practical requirements, combine appropriate components, plan batch production and avoid unnecessary finishing.
4. What materials can be used for SLS 3D printers?
Engineering polymer powders are commonly used for SLS. Cubein offers two SLS materials: PA12 and PA12 + GF30 to meet different functional requirements.