| An explanation of & free help with selective laser sintering process / SLS models | |
| The selective
laser sintering process builds SLS models using STL files created
from a 3D cad design. The basic material consists of powder with particle sizes of around 50 m which are successively spread in layers on top of each other. A computer controlled CO2 laser beam scans the surface & selectively binds together the relevant particles to make the SLS model During laser exposure, the powder temperature rises above the glass transition point causing the adjacent particles to flow together - this process is called sintering As the powder is solid, it is self-supporting, so unlike the SLA process, supports aren't necessary for SLS models |
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| free help with selective laser sintering process - notes & examples of SLS models | ||
When considering using the selective laser sintering process please bear in mind the following :- 1. The standard accuracy of SLS models is 0.2% / 0.2mm, but higher accuracy can be achieved. 2. The minimum wall thickness is 1 mm, but living hinges are possible with SLS models at 0.3 mm. 3. The selective laser sintering process creates SLS models which typically have a grainy surface with acceptable roughness. For aesthetic & part evaluation models, the stereolithography process is more suitable. 4. PA SLS models can be used for functional tests - snap fits, living hinges, thermal & mechanical loads. Glass filled PA SLS models are suitable for functional tests with high thermal resistance & impact strength. PS SLS models can be used to make lost wax models for investment casting. After PU impregnation, 80 Shore A TPE SLS models are watertight & can withstand a wide range of liquids. SLS models have mechanical properties comparable to injection moulded PA12 parts. Key: PA=Polyamide PS=Polystyrene TPE=Thermoplastic Elastomer 5. Although dimensions aren't limited, SLS models may be made of several sub-parts. |
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| carrier bag handle SLS model | door hinge SLS model | roof bracket SLS model |