US 12,214,376 B2
Choke bar slot die and slurry coating apparatus including the same
Joon Sun Park, Daejeon (KR); and Hyeong Geun Chae, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/271,049
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jun. 24, 2020, PCT No. PCT/KR2020/008207
§ 371(c)(1), (2) Date Feb. 24, 2021,
PCT Pub. No. WO2021/054581, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0113243 (KR), filed on Sep. 16, 2019.
Prior Publication US 2021/0387223 A1, Dec. 16, 2021
Int. Cl. B05C 5/02 (2006.01); H01M 4/04 (2006.01)
CPC B05C 5/0262 (2013.01) [H01M 4/0404 (2013.01); B05C 5/0258 (2013.01); B05C 5/0266 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A slot die comprising:
a slit-shaped discharge port in which a length of a discharge passage in a width direction based on a cross section of the discharge port is greater than a thickness perpendicular to the width direction,
a lower body configured to form a lower surface of the discharge passage;
an upper body configured to form an upper surface of the discharge passage, the upper body being disposed opposite the lower body to determine the thickness of the discharge passage and to have a slit-shaped through path formed in the width direction;
a stripe shim configured to be positioned on the discharge passage of the slot die and to divide the discharge port in the width direction;
a cover shim configured to be located on the stripe shim and to include a through hole formed in a central part; and
a choke bar configured to open and close a part of the discharge passage of the slot die while moving in a direction perpendicular to the discharge direction through the through path of the upper body,
wherein the discharge direction is a direction in which a slurry is configured to be discharged through the discharge port,
wherein the choke bar is perpendicular to the discharge direction along its longest axis,
wherein the slit-shaped through path extends from an opening in an outer surface of the upper body to the upper surface of the discharge passage, and
wherein an end of the choke bar is configured to travel along the slit-shaped through path from the opening in the outer surface of the upper body to the discharge passage.