Method of making a three-dimensional object by stereolithography

Details Method of making a three-dimensional object by stereolithography Method of making a three-dimensional object by stereolithography

1992-06-25

1993-10-26

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

395119, 4251744, 427508, 427510, 427512, 427553, 427554, 118620, 1562733, 1562735, 1562755, 1563071, 1563796, 2504921, 264308, 264344, 264DIG59, 364468, 364476, 365106, 365107, B29C 3508, B29C 4102

Patent

active

052563405

ABSTRACT:
An improved method for stereolithographically forming a three-dimensional object wherein ordinarily solidified internal walls of the object remain at least partially unsolidified. Any unsolidified medium within the object can be drained from the internal walls of the object prior to post-curing so that a hollow three-dimensional object is formed. The object is formed on a layer by layer basis with the internal portion of each layer of the object formed as a grid of solidified portions and unsolidified portions wherein the solidified and unsolidified portions are different on each layer. Objects formed in this manner can be used as patterns in investment casting.

REFERENCES:
patent: 4575330 (1986-03-01), Hull
patent: 4844144 (1989-07-01), Murphy et al.
patent: 4863538 (1989-09-01), Deckard
patent: 4961154 (1990-10-01), Pomerantz et al.
Requicha, A. A. G. et al. "Solid Modeling: a historical summary and contemporary assessment". Institute of Electrical and Electronics Engineers Computer Graphics and Applications, Mar. 1982, pp. 9-24.
Kodama, Rev. Sci. Instrum. 52 (11), Nov. 1981, "Automatic Method For Fabricating A Three Dimension Plastic Model with Photo-Hardening Polymer" pp. 1770-1773.
Herbert, A. J., Journal of Imaging Technology, vol. 15, No. 4, Aug. 1989 "A Review of 3D Solid Object Generation", pp. 186-190.
Herbert, A. J., Journal of Applied Photographic Engineering, vol. 8, No. 4, pp. 185-188, Aug. 1982, "Solid Object Generation".

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