US 11,718,039 B2
Stereolithography apparatus with periodic, transverse movement with an amplitude of .8 to 15 millimeters
Lorenz Josef Bonderer, Sargans (CH); Jörg Ebert, Buchs (CH); Theresa Sujata Maria Senti, Triesenberg (LI); and Rudolf Jussel, Feldkirch-Gisingen (AT)
Assigned to Ivoclar Vivadent AG, Schaan (LI)
Filed by Ivoclar Vivadent AG, Schaan (LI)
Filed on Feb. 4, 2021, as Appl. No. 17/167,207.
Claims priority of application No. 20157407 (EP), filed on Feb. 14, 2020.
Prior Publication US 2021/0252789 A1, Aug. 19, 2021
Int. Cl. B29C 64/393 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); B29C 64/124 (2017.01); B29C 64/236 (2017.01)
CPC B29C 64/393 (2017.08) [B29C 64/124 (2017.08); B29C 64/236 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 17 Claims
OG exemplary drawing
 
1. A stereolithography apparatus comprising
a build platform,
a tray, into which the build platform can be immersed, wherein at the bottom of the tray a light-transmissive film is formed or arranged which is elastically deformable,
a light source or energy source underneath the film, wherein the tray can be filled with flowable printing material, and
a control apparatus,
wherein the control apparatus (46) controls the movement of the build platform (14) relative to the film (22),
wherein the control apparatus (46) superimposes upon a substantially vertical release movement (32) between a slice of a structure (26), produced by stereolithography (10), on the build platform (34) from the film (22) a substantially horizontal movement (34) which movement (34) has alternating movement directions,
wherein the substantially horizontal movement is a translational, transverse movement, and
wherein the transverse movement (34) is configured as a relative movement between the build platform and the tray, which movement (34) extends at an angle between 60 and 120° relative to the release movement (32),
wherein the release movement (32) is configured as a movement of the build platform (14) and the transverse movement (34) is configured as a movement of the tray (12), and
wherein the transverse movement (34) is a periodic movement, having a movement amplitude in the range of 0.8 mm to 15 mm.