US 12,311,633 B2
Corrugating roller having enhanced heat transfer effectiveness
Kang Hyung Kim, Gyeonggi-do (KR); Hyung Keun Yoon, Seoul (KR); Hyung Jin Yoon, Gyeonggi-do (KR); Yun Ho Huh, Gyeonggi-do (KR); and Geum Seok Yang, Gyeonggi-do (KR)
Assigned to SRC CORPORATION, Gyeonggi-do (KR)
Appl. No. 17/419,926
Filed by SRC CORPORATION, Gyeonggi-do (KR)
PCT Filed Jan. 15, 2019, PCT No. PCT/KR2019/000566
§ 371(c)(1), (2) Date Jun. 30, 2021,
PCT Pub. No. WO2020/149424, PCT Pub. Date Jul. 23, 2020.
Prior Publication US 2022/0080695 A1, Mar. 17, 2022
Int. Cl. B31F 1/28 (2006.01); D21G 1/02 (2006.01)
CPC B31F 1/2863 (2013.01) [D21G 1/0266 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A fluid circulation heated corrugating roller comprising:
a roller body having a hollow cylindrical shape, the roller body having a first end portion and a second end portion opposing to the first end portion;
rotary shafts extending from the first end portion and the second end portion of the roller body to be formed coaxially;
a plurality of first ducts formed extending along an axial direction within the roller body so as to heat a perimeter portion of the roller body;
a plurality of second ducts formed extending along the axial direction in the perimeter portion of the roller body, the second ducts formed in a same number as the first ducts;
a compressible fluid configured to be used as a heating medium of the fluid circulation heating roller; and
a spiral laminar flow inducer formed within at least one of the first ducts or second ducts to generate a spiral laminar flow in the compressible fluid within the at least one of the first ducts or second ducts by reducing Reynolds number to suppress an occurrence of turbulence,
wherein one of the rotary shafts comprises a plurality of supply channels and a plurality of discharge channels extending in a radial direction of the roller and arranged radially adjacent to the first end portion of the roller body,
wherein a ratio of a diameter of the first ducts and second ducts, a diameter of the supply channels and a diameter of the discharge channels is within a range of (1.5-3):(1.15-2.0):1,
wherein the compressible fluid is steam,
wherein the spiral laminar flow inducer is an insert inserted into at least one of the first ducts or second ducts to extend in the axial direction,
wherein the insert comprises any one of a single ribbon twisted in a spiral shape, a plurality of ribbons twisted in spiral shapes and parallelly disposed, a plurality of intersecting ribbons twisted in spiral shapes, a single ribbon partially twisted in a spiral shape, a plurality of ribbons partially twisted in spiral shapes and parallelly disposed, a plurality of intersecting ribbons partially twisted in spiral shapes, a helical ribbon comprising a spiral ribbon attached to a wire core, and a wire twisted in a spiral shape,
wherein the ribbon twisted in a spiral shape and the helical ribbon comprising the spiral ribbon attached to the wire core have a slope of 30° or less.