US 12,220,859 B2
Three-dimensional shaping device and method for manufacturing three-dimensional shaped object
Taki Hashimoto, Shiojiri (JP); Kohei Yuwaki, Tsukuba (JP); and Atsushi Majima, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Apr. 13, 2022, as Appl. No. 17/719,662.
Application 17/719,662 is a division of application No. 16/912,260, filed on Jun. 25, 2020, granted, now 11,413,809.
Claims priority of application No. 2019-120736 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0234280 A1, Jul. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/118 (2017.01); B29C 64/209 (2017.01); B29C 64/241 (2017.01); B29C 64/245 (2017.01); B29C 64/295 (2017.01); B29C 64/314 (2017.01); B29C 64/321 (2017.01); B29C 64/343 (2017.01); B29C 64/35 (2017.01); B29C 64/393 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/118 (2017.08) [B29C 64/209 (2017.08); B29C 64/241 (2017.08); B29C 64/245 (2017.08); B29C 64/295 (2017.08); B29C 64/314 (2017.08); B29C 64/321 (2017.08); B29C 64/343 (2017.08); B29C 64/393 (2017.08); B29C 64/35 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 12 Claims
OG exemplary drawing
 
1. A three-dimensional shaping device, comprising:
a plasticization unit having a screw and configured to plasticize a material into a shaping material using the screw;
a drive unit configured to rotate the screw;
a supply flow path communicating with the plasticization unit and through which the shaping material flows;
a nozzle communicating with the supply flow path and configured to discharge the shaping material;
a discharge amount adjusting mechanism having a valve portion provided in the supply flow path, and configured to switch between stop and restart discharging of the shaping material from the nozzle by driving the valve portion;
a suction portion coupled to the supply flow path between the valve portion and the nozzle, the suction portion being configured to suck the shaping material;
a pressure measuring portion configured to measure a pressure of the shaping material in the supply flow path; and
a control unit configured to adjust rotation of the screw by controlling the drive unit according to a measured value of the pressure measured by the pressure measuring portion, wherein the screw of the plasticization unit is a flat screw having a groove forming surface on which a groove is formed through which the material is supplied, the plasticization unit includes a barrel having a facing surface which faces the groove forming surface, with an opening portion of the supply flow path being provided on the facing surface, and is configured to plasticize the material between the flat screw and the barrel into the shaping material, such that the shaping material flows from the opening portion into the supply flow path, the groove includes a first groove and a second groove, a depth of the first groove is greater than a depth of the second groove, and the second groove is located closer to a center of the flat screw than the first groove, and the control unit adjusts the rotation of the screw by controlling the drive unit without using the measured value which is measured during a period when the shaping material is sucked by the suction portion, wherein the control unit controls the drive unit under a first control during a period when the discharging of the shaping material from the nozzle is not stopped by the discharge amount adjusting mechanism, and controls the drive unit under a second control during a period when the discharging of the shaping material from the nozzle is stopped by the discharge amount adjusting mechanism, and a degree of adjustment of the rotation of the screw under the second control is smaller than a degree of adjustment of the rotation of the screw under the first control.