US 11,890,811 B2
Three-dimensional shaping apparatus and three-dimensional shaped article production method
Riona Toda, Shiojiri (JP); and Kenta Anegawa, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Dec. 23, 2021, as Appl. No. 17/560,387.
Claims priority of application No. 2020-214756 (JP), filed on Dec. 24, 2020.
Prior Publication US 2022/0203620 A1, Jun. 30, 2022
Int. Cl. B29C 64/336 (2017.01); B29C 64/236 (2017.01); B29C 64/209 (2017.01); B29C 64/343 (2017.01); B29C 64/295 (2017.01); B29C 64/314 (2017.01); B33Y 50/02 (2015.01); B22F 12/53 (2021.01); B29C 64/118 (2017.01); B29C 64/393 (2017.01); B22F 10/85 (2021.01); B22F 10/18 (2021.01); B33Y 30/00 (2015.01); B33Y 10/00 (2015.01)
CPC B29C 64/336 (2017.08) [B22F 10/18 (2021.01); B22F 10/85 (2021.01); B22F 12/53 (2021.01); B29C 64/118 (2017.08); B29C 64/209 (2017.08); B29C 64/236 (2017.08); B29C 64/295 (2017.08); B29C 64/314 (2017.08); B29C 64/343 (2017.08); B29C 64/393 (2017.08); B33Y 50/02 (2014.12); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 8 Claims
OG exemplary drawing
 
1. A three-dimensional shaping apparatus, comprising:
a plasticizing section that includes a screw and plasticizes a material by rotating the screw to form a plasticized material;
a stage having a deposition face at which the plasticized material is deposited;
an ejection section that ejects the plasticized material toward the deposition face, and has a first nozzle and a second nozzle, each of the first and second nozzles communicates with the plasticizing section;
a first ejection adjusting section that adjusts an ejection amount of the plasticized material from the first nozzle;
a second ejection adjusting section that adjusts an ejection amount of the plasticized material from the second nozzle;
a moving section that relatively moves the ejection section with respect to the stage along a first axis parallel to the deposition face; and
a processor that controls the plasticizing section, the first ejection adjusting section, and the second ejection adjusting section, wherein
the processor is configured to perform
a switching process, the switching process comprising switching from
a first state to a second state, wherein
in the first state, the first ejection adjusting section and the second ejection adjusting section are adjusted such that the ejection of the plasticized material from the first nozzle is stopped and the plasticized material is ejected from the second nozzle, and
in the second state, the first ejection adjusting section and the second ejection adjusting section are adjusted such that the plasticized material is ejected from the first nozzle and the second nozzle, and
an ejection amount decreasing process, occurring before switching from the first state to the second state, the ejection amount decreasing process comprising decreasing the ejection amount of the plasticized material from the second nozzle by controlling the screw or the second ejection adjusting section.