3D打印技術(shù)【英文】ppt課件

1、3D Printers,1,What is a 3D printer?,3D printers are not your average printer They bear little resemblance to todays document or photo printers, They can build objects from scratchor rather, from a CAD or 3D scanner fileout of a variety of materials.,2,How does it Work?,A typical 3D printer is very m

2、uch like an inkjet printer(噴墨式打印機） operated from a computer It builds up a 3D model one layer at a time, from the bottom upward, by repeatedly printing over the same area.,3,The printer creates a model over a period of hours by turning a 3D CAD drawing into lots of two-dimensional（二維）, cross-section

3、al layers Most 3D printers essentially works by extruding molten thermoplastics (mostly ABS) through a tiny nozzle that it moves around precisely under computer control.,4,Is not necessarily need to print in 3D with plastic: in theory, you can print objects using any molten material that hardens and

4、 sets reasonably quickly ABS has a whiteish-yellow color in its raw form, but pigments can be added to make it virtually any color,5,A new technique has been created that prints out artificial blood cells Designed by scientists at Germans Fraunhofer Institute,Uses of a 3D Printer - Medicine,6,The 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