Post on 18-Dec-2015
transcript
STEREOLITHOGRAPHYChris Hannigan
Joe McCullough
WHAT IS IT?
Additive Manufacturing Process Rapid Prototyping
First method of rapid prototyping developed by 3D Systems Patented in 1986 by
Chuck Hull
http://www.futuristspeaker.com/2012/02/2-billion-jobs-to-disappear-by-2030/
http://www.micromoldcorp.com/RPRO/Frame2Aa.html
HOW DOES IT WORK?
http://www.custompartnet.com/wu/stereolithography
CURING PROCESS
Liquid Photopolymer Acrylic monomer determines properties Photoinitiators Curing agent Oligomer Small monomer used to bond
UV Laser Cures by wavelength
Typically 320 - 360 nm
Blade
Jacobs, Paul F. Rapid prototyping & manufacturing: fundamentals of stereolithography. Sme, 1992
http://www.warnlaser.com/Laser_pointer/500mw-200mw-100mw-50mw-uv-violet-laser-pointer-razor-series
POST-CURING
“Green” parts only cured 80-96% Gaussian Energy Distribution
Post curing apparatus needed for further solidification Ultraviolet chamber: 300 Watts Microwave oven: 700 Watts Thermal oven: 125˚C
[1]
http://wired.wikidot.com/uv-lightbox
DISADVANTAGES
Cost Initial $100,000 -$400.000 Resin $300 per gallon
Shrinkage Inaccuracies can occur during any phase Tolerance must be monitored
Size of model Low volume output
ADVANTAGES
Functional Prototype Comparatively fast Material Efficiency Excellent Surface Finish
http://www.materialise.co.jp/giant-prototypes
FUTURE OUTLOOK
Specific medical devices Improvements in accuracy Desktop Stereolithography
$3,299
http://www.kickstarter.com/projects/formlabs/form-1-an-affordable-professional-3d-printer
PRINTED GUNS????
http://thekneeslider.com/rapid-prototypes/
http://info-rapidprototyping.blogspot.com/2009_02_15_archive.html
REFERENCE
[1] Salmoria, G.V., C.H. Ahrens, V.E. Beal, A.T.N Pires, and V. Soldi. "Evaluation of Post-curing and Laser Manufacturing Parameters on the Properties of SOMOS 7110 Photosensitive Resin Used in Stereolithography." Materials & Design 30.03 (2009): 758-63. Science Direct. Web