Optical molding process

Details Optical molding process Optical molding process

1996-07-03

1998-10-13

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Stereolithographic shaping from liquid precursor

264162, 264237, 264308, B29C 3508, B29C 4102

Patent

active

058208119

ABSTRACT:
A novel optical molding process for forming a three-dimensional article from a photosensitive resin which is liquid at normal temperatures which involves forming a plurality of laminated cured resin layers by a repetition of the step of forming a cured resin layer by selectively irradiating the surface of a photosensitive resin, wherein the photosensitive resin has been coagulated by cooling and the coagulated resin is irradiated to cure it. The process can produce a three-dimensional article having an overhanging part without producing warping in the finished product and without requiring a support for the overhanging part while this part is being optically molded.

REFERENCES:
patent: 4961154 (1990-10-01), Pomerantz et al.
patent: 5386500 (1995-01-01), Pomerantz et al.

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