Methods and apparatus for production of three-dimensional objects by stereolithography
US4996010A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1988 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Apr 18, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/49013
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved sterolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bonbardment or chemical reaction, information defining the object being specially processed to reduce curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction even for rather difficult object shapes, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process, and further including post processing wheren the object is subjected to additional UV curing while the object is under water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.