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

1989-10-30

1992-07-14

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

156 64, 1562735, 1562755, 1563071, 2504921, 264 401, 264308, 364476, 365106, 365107, 427 8, 427 531, 427 541, B29C 3508, B29C 4102, B29C 4152

Patent

active

051300648

ABSTRACT:
A stereolithographic method for constructing an object from a medium capable of solidification upon exposure to synergistic stimulation (e.g. a laser beam). Stacked layers of solidified medium are constructed by exposing the medium to synergistic stimulation in magnitude and pre-selected pattern, such that each layer is formed with external boundaries and up and down facing surfaces as necessary. At least a portion of a layer which is neither upfacing nor downfacing is also skinned, e.g., provided with a continuous skin formed by overlapping skin vectors or traces of the laser beam. Alternatively, all intermediate or internal cross-sectional layers are provided with skin and cross-hatch. Upfacing and downfacing features, and intermediate layers may be provided with a skin created by scanning in a first pass using non-consecutive skin vectors followed by scanning in at least one additional pass that completes the exposing process by filling in between the originally drawn vectors. To reduce waffling, regions of intersecting vectors at least in down-facing surfaces are determined. Exposure of one or more of the respective intersecting vectors is reduced at the regions of intersection to provide downfacing features with a uniform exposure.

REFERENCES:
patent: 2775758 (1956-12-01), Munz
patent: 4575330 (1986-03-01), Hull
patent: 4752498 (1988-06-01), Fudim
patent: 4863538 (1989-09-01), Deckard
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.
Herbert, A. J. "Solid Object Generation", Journal of Applied Photographic Engineering, vol. 8, No. 4 (Aug. 1982), pp. 185-188.
Fudim, E. V. "Sculpting Parts With Light", Machine Design (Mar. 6, 1986), pp. 102-106.
Fudim, E. V. "A New Method of Three-Dimensional Micromachining", Mechanical Engineering (Sep. 1985), pp. 54-59.
Kodama, Rev. Sci. Instrum. 52(11), Nov. 1981, "Automatic Method For Fabricating A Three Dimensional Plastic Model With Photo-Hardening Polymer", pp. 1770-1773.
Herbert, A. J., Journal of Imaging Technology, vol. 15, Number 4, August 1989 "A Review of 3D Solid Object Generation", pp. 186-190.

Affiliated with

Also associated with

Rating

Method of making a three dimensional object by stereolithography does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making a three dimensional object by stereolithography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a three dimensional object by stereolithography will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-333120