US 12,403,640 B2
Plasticizing device, injection molding device, and three-dimensional shaping device
Yuki Imai, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on May 26, 2023, as Appl. No. 18/324,190.
Claims priority of application No. 2022-087518 (JP), filed on May 30, 2022.
Prior Publication US 2023/0382031 A1, Nov. 30, 2023
Int. Cl. B29C 45/47 (2006.01); B29C 45/60 (2006.01); B29C 45/74 (2006.01)
CPC B29C 45/47 (2013.01) [B29C 45/60 (2013.01); B29C 45/74 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A plasticizing device comprising:
a rotary body having a groove forming surface in which a groove is formed and having a screw configured to rotate around a rotation axis, the rotary body being configured with a main part and a flange outwardly extending from the main part along a radial direction perpendicular to the rotation axis, the flange having a first contact surface extending along the radial direction;
a barrel having a facing surface facing the groove forming surface and having a communication hole through which a plasticized material flows out to an outside;
a heater configured to heat the material supplied to the groove;
a screw case accommodating the screw, the screw case having a ledge, the ledge having a second contact surface extending along the radial direction, the first and second contact surfaces directly facing and aligning each other along the rotation axis; and
one of a biasing portion and a sealing portion,
wherein the biasing portion is configured to bias the rotary body from the screw case toward the rotary body and having a rotary member having a hardness lower than a hardness of the rotary body at a tip end of the biasing portion, and the biasing portion is provided in the ledge directly adjacent to the first contact surface, and
the sealing portion is configured to seal a fluid in a space between the screw case and the rotary body, and the sealing portion is provided in the ledge directly adjacent to the first contact surface.