US 11,938,675 B2
3D printing device and 3D printing method
Zhifeng Yao, Beijing (CN)
Assigned to LUXCREO (BEIJING) INC., Beijing (CN)
Appl. No. 16/619,869
Filed by LUXCREO (BEIJING) INC., Beijing (CN)
PCT Filed Apr. 9, 2018, PCT No. PCT/CN2018/082280
§ 371(c)(1), (2) Date Dec. 5, 2019,
PCT Pub. No. WO2018/223761, PCT Pub. Date Dec. 13, 2018.
Claims priority of application No. 201710418091.4 (CN), filed on Jun. 6, 2017.
Prior Publication US 2020/0101658 A1, Apr. 2, 2020
Int. Cl. B29C 64/129 (2017.01); B29C 64/255 (2017.01); B29C 64/268 (2017.01); B29C 64/277 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B29C 64/129 (2017.08) [B29C 64/255 (2017.08); B29C 64/268 (2017.08); B29C 64/277 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 8 Claims
OG exemplary drawing
 
1. A 3D printer comprising:
a liquid storage tank configured to hold a polymerization liquid;
an anti-sticking element arranged on a bottom of the liquid storage tank and in contact with the polymerization liquid, the anti-sticking element being a polymer thin film used as a covering part for the liquid storage tank, wherein
a three-dimensional part is formed by polymerization of the polymerization liquid in a vicinity of the bottom of the liquid storage tank,
the three-dimensional part directly contacts with the anti-sticking element,
the anti-sticking element prevents the three-dimensional part from sticking to the bottom of the liquid storage tank,
an outer surface of the anti-sticking element includes a plurality of microscopic three-dimensional modules, which are in contact with the polymerization liquid,
a width of at least one of the plurality of microscopic three-dimensional modules is in a range from 0.01 μm to 10 μm,
a ratio of a length of at least one of the plurality of microscopic three-dimensional modules to a width of the at least one of the plurality of microscopic three-dimensional modules is approximately 1/1 to 1000/1,
a ratio of a length of at least one of the plurality of microscopic three-dimensional modules to a distance between the at least one of the plurality of microscopic three-dimensional modules and a neighboring microscopic three-dimensional module is approximately 1/1 to 1000/1,
the plurality of microscopic three-dimensional modules reduce an effective contact area between the three-dimensional part and the anti-sticking element, and
a light source configured to irradiate the polymerization liquid in the vicinity of the bottom of the liquid storage tank to form the three-dimensional part.