D打印技术英文3DPrintersWhatisa3Dprinter?3Dprintersarenotyouraverageprinter?Theybearlittleresemblancetotoday'sdocumentorphotoprinters,?Theycanbuildobjectsfromscratch—orrather,fromaCADor3Dscannerfile—outofavarietyofmaterials.?HowdoesitWork??Atypical3Dprinterisverymuchlikeani...
3DPrintersWhatisa3Dprinter?3Dprintersarenotyouraverageprinter?Theybearlittleresemblancetotoday'sdocumentorphotoprinters,?Theycanbuildobjectsfromscratch—orrather,fromaCADor3Dscannerfile—outofavarietyofmaterials.?HowdoesitWork??Atypical3Dprinterisverymuchlikeaninkjetprinter(喷墨式打印机)operatedfromacomputer?Itbuildsupa3Dmodelonelayeratatime,fromthebottomupward,byrepeatedlyprintingoverthesamearea.?Theprintercreatesamodeloveraperiodofhoursbyturninga3DCADdrawingintolotsoftwo-dimensional(二维),cross-sectionallayers?Most3Dprintersessentiallyworksbyextrudingmoltenthermoplastics(mostlyABS)throughatinynozzlethatitmovesaroundpreciselyundercomputercontrol.?Isnotnecessarilyneedtoprintin3Dwithplastic:intheory,youcanprintobjectsusinganymoltenmaterialthathardensandsetsreasonablyquickly?ABShasawhiteish-yellowcolorinitsrawform,butpigmentscanbeaddedtomakeitvirtuallyanycolorUsesofa3DPrinter-Medicine?Anewtechniquehasbeencreatedthatprintsoutartificialbloodcells?DesignedbyscientistsatGermans'FraunhoferInstitute?Thetechniqueinvolvesprintingartificialbiologicalmoleculeswitha3-Dinkjetprinter,andthenzappingthethosemoleculeswithalaserthatformsthematerialintotheshapeofbloodvessels.Likerealbloodvessels,theartificialvesselshavetwolayersandcanformcomplexbranchingstructures.?NowIwillshowaspeech.?Ihopeyoucanenjoyit.
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