STEREOLITHOGRAPHY DEVICE AND PRODUCTION METHOD FOR 3D PRINTED OBJECT

WIPO Patent Application WO/2023/058318

A1

Provided is a stereolithography device, the exposure accuracy of which is suitably ensured even when a printed object is enlarged. A projector of an exposure means is configured so as to be capable of movement in a second direction orthogonal to a first direction at an orientation inclined relative to the second direction so that the center positions of two adjacent pixels are shifted by a specified rendering pitch in the first direction,, and is configured so that exposure light can be switched between on/off states each time the projector moves a distance equivalent to the rendering pitch in the second direction. The exposure of a specified rendering area of a photocurable material is carried out sequentially for each of a plurality of strip regions extending in the second direction and having a specified rendering width in the first direction, and when obtaining a 3D printed object by layering multiple layers of the photocurable material while curing the respective layers, a joining section joining two adjacent strip regions among the plurality of strip regions is formed, and the in-plane positions of the joining parts in at least two layers among the plurality of layers are different from each other.

HOKI TETSUO (JP)
KUWABARA AKIRA (JP)
TSUKAHARA EIICHI (JP)

PCT/JP2022/030167

April 13, 2023

August 05, 2022

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SHASHIN KAGAKU CO LTD (JP)

B28B1/30; B29C64/393; B29C64/129; B29C64/282; B33Y10/00; B33Y30/00; B33Y50/02

JP2003340923A	2003-12-02
JP2004249508A	2004-09-09
JP2010089438A	2010-04-22
JP2020023064A	2020-02-13
CN109228348A	2019-01-18

YOSHITAKE Hidetoshi et al. (JP)

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