US 12,220,866 B2
Additive manufacturing devices and methods
Guang Zhu, Ningbo (CN); Mike Shang-Yu Yang, Belmont, CA (US); and Michael Robert Strohecker, Belmont, CA (US)
Assigned to LUXCREO INC., Belmont, CA (US)
Filed by LUXCREO INC., Belmont, CA (US)
Filed on Dec. 14, 2023, as Appl. No. 18/540,833.
Application 18/540,833 is a continuation in part of application No. 18/190,059, filed on Mar. 24, 2023.
Application 18/190,059 is a continuation of application No. PCT/CN2022/097817, filed on Jun. 9, 2022.
Claims priority of provisional application 63/208,543, filed on Jun. 9, 2021.
Prior Publication US 2024/0123683 A1, Apr. 18, 2024
Int. Cl. B29C 64/264 (2017.01); A61C 7/00 (2006.01); B29C 64/135 (2017.01); B29C 64/245 (2017.01); B29C 64/255 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 80/00 (2015.01); B29L 31/00 (2006.01)
CPC B29C 64/264 (2017.08) [A61C 7/002 (2013.01); B29C 64/135 (2017.08); B29C 64/245 (2017.08); B29C 64/255 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 80/00 (2014.12); B29L 2031/753 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An additive manufacturing device for manufacturing a transparent dental appliance, comprising
a light source configured to provide light to cure photocurable resins;
a building device including a resin tank configured to store the photocurable resins, the building device having a building surface on which the photocurable resins are cured; and
a light scattering member arranged between the light source and the building surface, the light scattering member being configured to alter a light propagation direction of the light from the light source to cause a light scattering effect on the building surface, wherein:
the light scattering member has a haze of no less than 50%,
a transmittance rate of the light scattering member is no more than 80%, and
the light scattering member has a half peak angle ratio (R) of no less than 1.5, wherein the R is defined as θn/θ0, θn being a first half peak angle of the light scattering member, θ0 being a second half peak angle of a membrane made of fluorinated ethylene propylene (FEP), and the θn and the θ0 are measured under the same conditions.