<>Contour Crafting builds up shapes in layers by controlling the flow of liquid building materials using two movable, programmable trowel-like tools deployed around a nozzle.
For house construction, the system will use crane- or gantry-
mounted nozzles, from which building material — concrete, in the
prototype now operating in Hwang’s laboratory — comes out at a constant
rate. Moveable trowels surrounding the nozzle mold it into the desired
shape, as the nozzle moves over the work.
Hwang has put into service a working prototype that can build
full-scale walls. Khoshnevis plans to build a freestanding house within
in 24 hours within the next 18 months.
Hwang has been at Information Sciences Institute since leaving the Daniel Epstein department of industrial and systems management, the previous home of the contour crafting project Khoshnevis has been developing for more than three years.
A native of South Korea, Hwang received a B.S. in physics at Dankook University in 1994, and advanced degrees from USC (M.S. mechanical engineering 1999, Ph.D. industrial and systems engineering 2005).