Zack Polizzi Maxwell Tucker North Carolina School of Science and Mathematics D ESIGN AND C ONSTRUCTION OF A M ULTI -M ATERIAL 3D P RINTER

Introduction | Design and Construction | Business Plan 3D P RINTERS Allow for rapid creation of 3-dimensional objects Applications in rapid prototyping, design testing, flexible production, and a variety of other uses /2012/8/26/could-3d-printing-help-an-ailing-economy.html

Introduction | Design and Construction | Business Plan P ROBLEMS WITH C URRENT D ESIGNS Current consumer printers offer limited material selection Relatively slow print speeds Extrusion printing struggles with complex unsupported structures

Introduction | Design and Construction | Business Plan O RIGINAL E NGINEERING G OALS Build a working 3D printer which is capable of printing in multiple different materials Create a design that is flexible and extensible Have the ability to print directly from 3D CAD drawings Aiming to print in various metals, plastics, ceramics, sugar, glass, and many other materials

Introduction | Design and Construction | Business Plan D ESIGN E VOLUTION Originally an idea for a Research in Physics project Original design was for a solar- powered 3D printer Built a prototype over Mini-Term Presented research in Singapore Currently working on upgrades and hope to bring product to market through Entrepreneurship class Photo Credit: Luke Fernandez

Introduction | Design and Construction | Business Plan D ESIGN T HEORY Selective Laser Sintering 1.Lay down a base material layer 2.Melt a cross-section of the 3D object into the base material 3.Add a thin layer of additional material 4.Melt the next cross-section into the new material layer 5.Repeat until printing is finished, building 2D layers vertically upon each other until the 3D object is complete

Introduction | Design and Construction | Business Plan C ONSTRUCTION : XY T ABLE Photo Credit: Luke Fernandez

Introduction | Design and Construction | Business Plan C ONSTRUCTION : E LECTRONICS AND P RINT H EAD Photo Credit: Zack Polizzi Photo Credit: Luke Fernandez

Introduction | Design and Construction | Business Plan C URRENT W ORK Planned Upgrades Laser Powered Greater Material Capability Higher Resolution Faster Print Speeds Fully Automatic Printing Photo Credit: Zack Polizzi

Introduction | Design and Construction | Business Plan L ASER U PGRADES Photo Credit: Zack Polizzi

Introduction | Design and Construction | Business Plan L ASER D IODE P OWER S UPPLY 40A Buck Regulator Schematic

Introduction | Design and Construction | Business Plan

Completed Power Supply

Introduction | Design and Construction | Business Plan C OMPETITIVE M ATRIX 16 PrinterOur PrinterMakerbotReprapShapeways EOSINT 280 Print Speed5cm 3 /min1cm 3 /min.5 cm 3 /min6-20 days10cm 3 /min Product Cost$5,000$3,000$700+ $20- $1,000/print $680,000 Material Capabilities Many powdered materials ABS/PLA plastic ABS/PLA Plastic Plastics, 3 metals, ceramic, sandstone Plastics, metals, ceramics

Q UESTIONS ? T HANKS TO L UKE F ERNANDEZ, S TUART W ELLS, D R. L O B UGLIO, D R. H ALPIN, D R. B ENNETT, D R. S HECK NCSSM R ESEARCH