3D打印技術(shù)【英文】ppt課件

1、13D printers are not your average printerThey bear little resemblance to todays document or photo printers,They can build objects from scratchor rather, from a CAD or 3D scanner of a variety of materials. 2A typical 3D printer is very much like an inkjet printer(噴墨式打印機 operated from a computerIt bui

2、lds up a 3D model one layer at a time, from the bottom upward, by repeatedly printing over the same area.3The printer creates a model over a period of hours by turning a 3D CAD drawing into lots of two-dimensional二維, cross-sectional layersMost 3D printers essentially works by extruding molten thermo

3、plastics (mostly ABS) through a tiny nozzle that it moves around precisely under computer control.4Is not necessarily need to print in 3D with plastic: in theory, you can print objects using any molten material that hardens and sets reasonably quicklyABS has a whiteish-yellow color in its raw form,

4、but pigments can be added to make it virtually any color5A new technique has been created that prints out artificial blood cellsDesigned by scientists at Germans Fraunhofer Institute6The technique involves printing artificial biological molecules with a 3-D inkjet printer, and then zapping the those molecules with a laser that forms the material into the shape of blood vessels. Like real blood vessels, the artificial vessels have two layers and can form complex br