3D打印技术【英文】PPT文件格式下载.ppt
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3D打印技术【英文】PPT文件格式下载.ppt
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3DPrinters,Whatisa3Dprinter?
@#@,3DprintersarenotyouraverageprinterTheybearlittleresemblancetotodaysdocumentorphotoprinters,Theycanbuildobjectsfromscratchorrather,fromaCADor3Dscannerfileoutofavarietyofmaterials.,HowdoesitWork?
@#@,Atypical3Dprinterisverymuchlikeaninkjetprinter(喷墨式打印机)operatedfromacomputerItbuildsupa3Dmodelonelayeratatime,fromthebottomupward,byrepeatedlyprintingoverthesamearea.,Theprintercreatesamodeloveraperiodofhoursbyturninga3DCADdrawingintolotsoftwo-dimensional(二维),cross-sectionallayersMost3Dprintersessentiallyworksbyextrudingmoltenthermoplastics(mostlyABS)throughatinynozzlethatitmovesaroundpreciselyundercomputercontrol.,Isnotnecessarilyneedtoprintin3Dwithplastic:
@#@intheory,youcanprintobjectsusinganymoltenmaterialthathardensandsetsreasonablyquicklyABShasawhiteish-yellowcolorinitsrawform,butpigmentscanbeaddedtomakeitvirtuallyanycolor,AnewtechniquehasbeencreatedthatprintsoutartificialbloodcellsDesignedbyscientistsatGermansFraunhoferInstitute,Usesofa3DPrinter-Medicine,Thetechniqueinvolvesprintingartificialbiologicalmoleculeswitha3-Dinkjetprinter,andthenzappingthethosemoleculeswithalaserthatformsthematerialintotheshapeofbloodvessels.Likerealbloodvessels,theartificialvesselshavetwolayersandcanformcomplexbranchingstructures.,NowIwillshowaspeech.Ihopeyoucanenjoyit.,
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