25-07-2014, 11:02 AM
3D Printing
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3D
3D computer graphics are graphics which are using three dimensional representation of geometric data
Printing process
Printing is a process for reproducing text and images, typically with ink on paper using a print press.
3D Printing
3D Printing is a phrase used to describe the process of creating three objects from digital file using a materials printer, in a manner similar to printing images on paper.
SLS method
Selective laser sintering (SLS) is an additive manufacturing technique that uses a high power laser (for example, a carbon dioxide laser) to fuse small particles of plastic, metal (direct metal laser sintering),ceramic or glass powders into a mass that has a desired 3-dimensional shape
Methods of FDM printing
Laser sintering uses a laser to melt granular material in place upon the object.
A UV ray is used to cure and harden polymers layer by layer.
Nozzles lay material in gel form on top the object.
Laminated object manufacturing
Laminated object manufacturing (LOM) is a rapid prototyping system developed by Helisys Inc. In it, layers of adhesive-coated paper, plastic or metal laminates are successively glued together and cut to shape with a knife or laser cutter.
How it works
Stratasys FDM (Fused Deposition Modeling) technology provides the foundation for all Dimension 3D printers. Two materials — one for models, one for support — are heated in an extrusion head and deposited in thin layers on a modeling base. The model is precisely built layer upon layer. When the model is complete, the support material is removed leaving an accurate, durable functional 3D model.
SUCCESS stories
Auto parts: for example, parts of "Formula 1" car engines, are made by direct laser sintering of metal;
Aircraft parts: F-18 (fight aircraft) tube for the control system environment;
Individual orthodontics: the company Align Technology uses the 3D Printing to generate accurate individual dental braces for hundreds of thousands of patients worldwide by stereolithography from 3D-scans of the mouth; polymer is used as a material for the production of staples;
Individual hearing devices: manufactured by companies Siemens and Phonak, based on 3D-scan of the ear canal, so that the device is ideally suited to the user;
In Conclusion
3D printing is an expanding technology which may soon start an industry in which everyone has the possibility of being a manufacturer.
3D printing has a lot of possible benefits to society, although the products created must be regulated.