Anika Lohrentz, Alice Tang, Rexxi Prasasya, Chou Mai William Murphy – Advisor Greg Gion - Client
Background Problem Statement Competition Design Requirements Design Proposals Design Evaluations Future Work
Prosthetic skin: covers amputations and large wounds Client’s Method Hand-paint mold Fill mold with silicone Cure silicone in oven Add external layer of color
Skin prosthetics colored manually Costs time, money, energy Goal: systematic method to mass-produce skin color
Rapid Prototyping Utilizes CAD generated image Time efficient for patients Skin texture not completely precise Color not yet explored
Pigments adhere to substrate Substrate- silicone, polyurethane, TPE Pigment- primary colors Safety- non-toxic and hypoallergenic Operation by one person Cost- under $500
Pad Printing Laser Printing Lithography Inkjet Printing
Three main components Cliché – etched plate with design Silicone pad Ink Uses applied force – transfer ink
Pros User-friendly Versatile Variety of ink colors Easy to modify Uses solvent based-ink Substrate – higher surface energy than silicone pad Thin ink Cons
Electrostatic images on drum assembly Opposite charges transfer images to paper Fuser heats toner
Pros High speed Highly detailed and precise Toner binds to substrate High fuser temperature – above C Routine maintenance Expensive technology Cons
Image converted to film and plates Ink-receptive coating activated Image offset to a rubber “blanket” Image transferred to substrate
Pros Digital pre-press processing Separated fountain inputs Precise reproduction Mass production Cons Expensive One color per unit
Resistor or piezoelectric heater warms ink Ink drops onto surface of paper Plate feed printer for flat surfaces
Pros Inexpensive Simple design Materials easy to obtain Less innovative design Color adheres to surface only Cons
CriteriaWeight Accuracy0.15 Feasability0.35 Durability of Process0.15 Durability of Color0.05 Useability0.1 Cost0.05 Safety0.05 Efficiency (Mass Production)0.1 Total1 LaserPad PrintLithoInkjet
Obtain materials for Inkjet Printing process Plate feed printer Compatible pigment Plasma-treatment setup Coating material for printer – nonstick Silicone Build and test process Upscale process for mass production
“Printing Process Description: Lithography.” Printers’ National Environmental Assistance Center “Copying Wrinkles for Better Prosthetic.” NewScientists Blog. Jan “Offset printing.” MM-Packaging “Offset Lithography.” Serif Printing Resource “How Laser Printer Works.” Tom Harris