Plastic and nonmetallic article shaping or treating: processes – Stereolithographic shaping from liquid precursor
Patent
1997-05-13
1999-08-31
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Stereolithographic shaping from liquid precursor
264 401, 264308, 364130, 36446827, 425135, 4251744, B29C 3508, B29C 4102, B29C 4152
Patent
active
059450584
ABSTRACT:
This invention relates to the stepwise layer-by-layer formation of a three-dimensional object through application of the principles of stereolithography and to the automatic detection of surface features of each layer of a three-dimensional object to manufacture parts more reliably, more accurately and more quickly. Automatic detection of trapped volume regions and size of solidified cross-sectional regions are disclosed. Automatic selection of recoating styles is made based on (1) the detected regions,(2) empirically or otherwise determined optimum recoating styles for different types of regions, and (3) a look-up table, other correlation system, or processor for associating recoating style information with laminae containing particular identified regions.
REFERENCES:
patent: 5096530 (1992-03-01), Cohen
patent: 5182715 (1993-01-01), Vorgitch
patent: 5258146 (1993-11-01), Almquist et al.
patent: 5597520 (1997-01-01), Smalley
Copy of International Search Report for International Application No. PCT/US98/09666.
Manners Chris R.
Smalley Dennis R.
3-D Systems, Inc.
Collins Forrest L.
Smalley Dennis R.
Tentoni Leo B.
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