US 12,246,880 B2
Apparatus and method for forming container and container
Byung Kook Lee, Seoul (KR); Kwang Soo Park, Gwacheon-si (KR); Hui Jae Song, Seoul (KR); and Gyu Hwan Cha, Seoul (KR)
Assigned to CJ CHEILJEDANG CORPORATION, Seoul (KR)
Appl. No. 16/650,253
Filed by CJ CHEILJEDANG CORPORATION, Seoul (KR)
PCT Filed Sep. 21, 2018, PCT No. PCT/KR2018/011310
§ 371(c)(1), (2) Date Mar. 24, 2020,
PCT Pub. No. WO2019/066430, PCT Pub. Date Apr. 4, 2019.
Claims priority of application No. 10-2017-0124092 (KR), filed on Sep. 26, 2017; and application No. 10-2018-0112663 (KR), filed on Sep. 20, 2018.
Prior Publication US 2021/0198007 A1, Jul. 1, 2021
Int. Cl. B29C 51/36 (2006.01); B29C 51/10 (2006.01); B65D 21/02 (2006.01); B29L 31/00 (2006.01)
CPC B65D 21/0233 (2013.01) [B29C 51/10 (2013.01); B29C 51/36 (2013.01); B29L 2031/712 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A container forming apparatus for forming a container by hot forming, comprising:
a first mold including a main-body forming part configured to form a main body of the container, a skirt forming part extending upward from the main-body forming part to form a skirt of the container, and a flange forming part extending from an upper end of the skirt forming part in a direction toward the outside to form a lower surface of a flange of the container; and
a second mold provided over the first mold and vertically movably installed to press an upper surface of the flange, the second mold including a pressing surface configured to press down on a sheet, which is to be formed into the flange, in a location corresponding to the flange forming part,
wherein the pressing surface includes an extension that is a portion further extending in a direction toward the center of the main-body forming part beyond an inner end portion of the flange forming part and configured to form a protrusion protruding on an inside surface of the skirt,
wherein the pressing surface is formed in a curved-surface shape, and the extension extends to form a curved surface having the same radius of curvature as the pressing surface,
wherein the skirt includes, on an outside surface of an upper end portion of the skirt, a groove concavely formed along a circumferential direction of the outside surface of the upper end portion of the skirt,
wherein the skirt forming part includes a protrusion protruding along a circumferential direction of the upper end of the skirt forming part to form the groove,
wherein the skirt forming part is formed to be inclined in a direction toward the center of the main-body forming part as the skirt forming part extends upward in an area between an upper end of the main body forming part and a lower end of the protrusion, and
wherein on a vertical cross-section of the first mold and the second mold, a distance from a line vertically extending from an inner end portion of the extension to a line vertically extending from the inner end portion of the flange forming part is formed to be 1 mm to 5 mm.