Plastic article or earthenware shaping or treating: apparatus – Means applying electrical or wave energy directly to work – Radiated energy
Patent
1988-11-29
1992-08-04
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Means applying electrical or wave energy directly to work
Radiated energy
250432R, 2504921, 264 22, 427 531, 427 541, 427 55, B29C 3508
Patent
active
051353792
ABSTRACT:
An improved apparatus forms three-dimensional objects in layers by modulating irradiation of liquid photopolymers, either stepwise by alternating photopolymer deposition and irradiation, or continuously by simultaneous deposition and irradiation. Photopolymer is deposited onto open, unfenced and uncontained, substrate and is contained by a photopolymer wall formed around the object simultaneously with it by supplemental irradiation, for providing to irradiated layer unobstructed access critical to apparatus simplification, automation, fabrication time and to feasibility of continuous forming. To decrease drastically fabrication time, whole layer is irradiated simultaneously using masks photoplotted on a roll of film or a matrix of miniature individually controlled components tightly packed similar to liquid-crystal displays, with shrinkage distortion minimized by constraining the irradiated photopolymer surface and/or by solidifying infinitely thin surfaces in continuous mode.
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