SLS process. 1 CAD model. 2 Cross section of the model. 3 Laser. 4 sinter powder. 5 Scraper roller. 6 Sinterpowder supply table. 7 SLS model table.
Selective laser sintering (SLS) or laser engineered net shaping is a rapid prototyping technique that uses the sintering process. Using a laser, low to low, a powder is melted into a solid product.
ProcessA virtual CAD model (1) is divided into layers (2). These layers are obtained by a laser (3) with a prism, one sintered until a full copy of the virtual model is obtained.
The sinter powder (4) is pushed up with the sinter powder feed table (6). The SLS model table (7) with the model in turn decreases simultaneously. The scraper roller (5) stretches a layer of fresh sinter powder over the model. Then the laser (3) melts the sinter powder locally. This creates low to low. Advantage
Because the sintered product is surrounded by unsintered powder, it does not require a structure to support the product.
Compared to other methods of rapid prototyping, the SLS process allows for a wide range of materials ranging from nylon, PS, steel, titanium to cast sand. Depending on the material to be sintered, 100% density can be achieved.
SLS technology makes it possible to make complex products with relatively simple means. Disadvantage
The surface quality of the sintered product is usually so bad that a post treatment is necessary. This can be grinded with different techniques, such as rays and / or sliding. History
SLS was developed and patented by Carl Deckard of the University of Texas, Austin, in the mid 1980s. A similar process, without commercial expansion, was also made by R.F. in 1979. Housholder developed. Application
In addition to the production of proto, SLS technology is increasingly used as a full-fledged, low-cost production technique of complex products. Also see Externe link
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