Speed is critical in today’s fast-paced world. Fast transitions from ideas to functional prototypes will provide you with an advantage. Delays in prototyping, testing and getting into production will stall innovation and skyrocket costs. This is where the Selective Laser Sintering (SLS) technology can become your strongest asset.
Unlike traditional manufacturing methods, which require tooling, molds and extensive lead times, SLS technology offers a rapid method by which companies can create highly complex, structurally sound components that allow for reduced delays, mitigated risks, and accelerated product development.
What Is SLS 3D Printing?
Selective Laser Sintering (SLS) is an advanced additive manufacturing technique that utilizes a high-energy laser beam to fuse fine nylon polymer powder into solid parts that are highly durable, one layer at a time.
In the process, the SLS system creates a thin layer of powder on a build platform and the laser is used to sinter (fuse) the powder according to a digital model. After each layer is complete the build platform is lowered slightly and the process is repeated until the entire part is created. All of the unsintered powder surrounding the part acts as a natural support structure, eliminating the need for additional support materials.
This ability allows designers to create highly complex geometries, internal features and interlocking components that would otherwise be difficult, expensive or even impossible to create using traditional manufacturing processes.
1. Faster Prototyping Without Tooling Delays
Tooling is one of the biggest bottlenecks in a traditional manufacturing process. Injection moulding and other traditional methods use custom tooling to create a part; therefore, creating, manufacturing and testing the tooling for most injection moulding processes takes weeks or months to complete. This lengthens the timeline for the beginning phase of product development.
Selective Laser Sintering (SLS) 3D Printing removes this bottleneck entirely because SLS prints parts directly from digital CAD files with no tooling or custom tooling required to create parts. Therefore, once the part design is finalised, production can be initiated, which means:
- Rapid workflow from design to production.
- Short lead times.
- Lower upfront investment.
- Fast redesigns without needing to change and/or update any tooling.
By removing tooling delays, companies will be able to go from an idea to creating the actual prototype in just a few days instead of weeks, therefore reducing the overall development timeframe significantly.
2. Functional Prototypes That Perform Like Final Products
Another area where the prototyping techniques have limitations is the fact that many of these prototype designs & methods generate prototypes that do not have the right physical characteristics to function in the real world, as intended. Therefore, a lot of prototypes will create inaccurate test results and an engineer could experience unexpected failures with them during the later stages of their project.
SLS technology has helped to resolve this issue by producing strong, durable nylon prototypes which exhibit excellent mechanical performance. SLS prototypes are manufactured to be structurally sound, resistant to heat and capable of withstanding the loads and stresses required in their applications.
This means that SLS prototypes allow engineers to:
- Conduct functional testing in real-world conditions,
- Validate mechanical performance,
- Assess snap-fit assembly and hinge design efficacy,
- Evaluate durability based upon repeated usage,
- Conduct structural and stress testing.
By utilizing an SLS manufactured prototype, an engineer is able to realistically identify any design flaws early in their project and thereby reduce the frequency of expensive redesign later on within the timeline of projects.
3. Complex Designs Without Manufacturing Constraints
In traditional manufacturing processes, the constraints imposed by the manufacturing process can often lead the designer to simplify the design. Complex geometries, such as channels inside the component, intricate lattice structures, and complex curves, can greatly increase the complexity and cost of the manufacturing process.
In the process of SLS, the design flexibility is greatly enhanced. The surrounding powder supports the component during the printing process, eliminating the need for supports. This allows for:
- Complex geometries
- Internal channels
- Lattice structures
- Integration of multiple components into one
- Moving parts within one build
By eliminating the constraints associated with traditional manufacturing processes, the designer is able to concentrate on optimizing the product instead of adjusting the design to suit the manufacturing process.
4. Rapid Design Iterations and Parallel Testing
Product Development is rarely a straight path. Multiple design revisions are often necessary before achieving an optimum design. In traditional manufacturing, each design change requires tool changes, which adds both time and cost.
SLS Technology allows for much quicker iteration of designs. Designers can easily modify their CAD files, submit new versions of the CAD file for printing, and simply print a modified version of the part without incurring any additional set-up costs. Designers can even produce multiple versions of a part simultaneously, allowing designers to rapidly compare different versions side by side.
(SLS) provides for:
- Faster Feedback Loops
- Simultaneous Testing of Design Alternatives
- Immediate Design Optimization
- Reduction in Development Risk
The ability to make quick iterations results in better performing products, and it can reduce the overall development time significantly.
5. Seamless Transition to Low-Volume Production
Many businesses experience a gap between the completion of their prototype validation and their full-scale production. In traditional manufacturing, this often results in a higher minimum order quantity and (or) higher upfront tooling investments.
SLS provides an effective means of bridging that gap. SLS technology:
- is well-suited for low-volume production runs,
- better meets both low-volume & custom product runs,
- allows for market-testing before full-scale production,
- can manufacture spare-parts on-demand, and
- provides flexibility in meeting unexpected demand.
Using SLS technology, businesses can bring products to market quicker without having to invest in tooling or produce large volume quantities of product. Within SLS, businesses can verify that the prototypes that have been approved by their customers can now be mass produced at the correct quantities. This will reduce financial risk for the business.
6. Reduced Overall Development Costs
Many businesses experience a gap between the completion of their prototype validation and their full-scale production. In traditional manufacturing, this often results in a higher minimum order quantity and (or) higher upfront tooling investments.
SLS provides an effective means of bridging that gap. SLS technology:
- is well-suited for low-volume production runs,
- better meets both low-volume & custom product runs,
- allows for market-testing before full-scale production,
- can manufacture spare-parts on-demand, and
- provides flexibility in meeting unexpected demand.
Using SLS technology, businesses can bring products to market quicker without having to invest in tooling or produce large volume quantities of product. Within SLS, businesses can verify that the prototypes that have been approved by their customers can now be mass produced at the correct quantities. This will reduce financial risk for the business.
Who Benefits Most from SLS in Product Development?
SLS 3D Printing is best suited for:
- Product designers who need innovative product designs
- Start-ups who need rapid product development
- Engineering teams who need functional testing
- Automotive and industrial product manufacturers
- R&D teams who need performance validation
For industries like these, which require speed, strength, and accuracy, SLS is the best competitive advantage.