Patent ID: 9545753
Date: 2017-01-17
CPC Classifications: B29C,B33Y

Claim:
1. A method for producing a three-dimensional object in layers by a stereolithography machine, the method comprising: a container for a fluid substance in the liquid or paste state suited to be solidified through exposure to predefined radiation, the container having a bottom; means for emitting said predefined radiation, suited to selectively irradiate a layer of said fluid substance having a predefined thickness and arranged adjacent to said bottom in order to solidify it; a modelling plate suited to support said solidified layer; actuator means for moving said modelling plate with respect to said bottom at least according to a modelling direction (X) that is perpendicular to said bottom; levelling paddle developed mainly according to a longitudinal direction arranged in contact with said fluid substance; said method comprising the following operations: immersing said modeling plate in said fluid substance, said modeling plate being arranged at a distance from said bottom equal to said predefined thickness so as to define said layer of fluid substance; selectively irradiating said layer of fluid substance in such a way as to obtain said solidified layer; moving said solidified layer away from said bottom so as to make it emerge from said fluid substance wherein said moving of said solidified layer leaves a depression in said fluid substance, said depression being adjacent to said bottom; filling said depression by moving said levelling paddle between said modelling plate and said container from a first area of said container, in which the level of said fluid substance is higher than the level of said depression, towards said depression, wherein said leveling paddle is immersed in and extracted from said fluid substance, and wherein the levelling paddle is kept in contact with said fluid substance in said container during the movement.