US 12,076,923 B2
Three-dimensional shaping device
Eiji Okamoto, Matsumoto (JP); Toshimitsu Hirai, Hokuto (JP); Kaoru Momose, Hara-mura (JP); and Takayuki Yokoyama, Matsumoto (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Feb. 23, 2022, as Appl. No. 17/652,154.
Claims priority of application No. 2021-031033 (JP), filed on Feb. 26, 2021.
Prior Publication US 2022/0274333 A1, Sep. 1, 2022
Int. Cl. B29C 64/357 (2017.01); B29C 64/209 (2017.01); B29C 64/393 (2017.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); B33Y 70/00 (2020.01); B29K 105/00 (2006.01)
CPC B29C 64/209 (2017.08) [B29C 64/393 (2017.08); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); B33Y 70/00 (2014.12); B29K 2105/0005 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A three-dimensional shaping device, comprising:
a binder storage configured to store a binder containing water, a water-soluble resin, and a wetting agent;
a first depressurizing sub-tank configured to receive and store the binder;
a first pressurizing sub-tank configured to receive and store the binder;
an ejection head including a nozzle configured to eject the binder, an individual liquid chamber communicating with the nozzle, an inflow path configured to flow the binder into the individual liquid chamber from a first manifold, and an outflow path configured to flow the binder out of the individual liquid chamber to a second manifold, the inflow path comprising a first common liquid chamber configured to receive the binder;
a circulation flow path configured to circulate the binder flowing out of the second manifold in fluid communication with the outflow path to the first manifold in fluid communication with the inflow path and through the first depressurizing sub-tank, a deaeration device, and the first pressurizing sub-tank in that order, the binder storage being disposed outside of the circulation flow path;
a first pressure sensor disposed within the first common liquid chamber of the ejection head and configured to detect pressure of the binder within the first common liquid chamber of the ejection head; and
a control unit configured to adjust a circulation speed of the binder based on a detection result of the first pressure sensor and increase the circulation speed of the binder when the pressure is smaller than a threshold value, the control unit being configured to adjust an operation of vacuum pump to adjust a pressure in the first common liquid chamber.