Abstract: A fluid circulation heating roller according to an embodiment of the present invention includes a roller body having a hollow cylindrical shape, a rotation shaft extending from each of opposite end portions of the roller body and disposed in the same center line, multiple first ducts extending in an axial direction in the roller body so as to heat the outer circumferential portion of the roller body, multiple second ducts extending in the axial direction on the outer circumferential portion of the roller body, wherein the number of second ducts are the same as the number of first ducts, and an insert inserted into at least one of the first or second ducts and extending in the axial direction. The generation of turbulence flow of fluid can be suppressed and laminar flow can be induced, whereby it is possible to maintain fluid-flowing speed and facilitate steam circulation and heat transfer.

Abstract: A fluid circulation heating roller according to an embodiment of the present invention includes a roller body having a hollow cylindrical shape, a rotation shaft extending from each of opposite end portions of the roller body and disposed in the same center line, multiple first ducts extending in an axial direction in the roller body so as to heat the outer circumferential portion of the roller body, multiple second ducts extending in the axial direction on the outer circumferential portion of the roller body, wherein the number of second ducts are the same as the number of first ducts, and an insert inserted into at least one of the first or second ducts and extending in the axial direction. The generation of turbulence flow of fluid can be suppressed and laminar flow can be induced, whereby it is possible to maintain fluid-flowing speed and facilitate steam circulation and heat transfer.

Abstract: Disclosed are a gear product having an enhance deposition surface and a deposition system for manufacturing the gear product. The gear product having a reinforced deposition surface according to the present disclosure includes: teeth in which valleys and crests are successively famed along an outer or inner circumference of a cylindrical body having a central rotation shaft; and a reinforced deposition layer, which is formed by radiating a laser beam in a coaxial nozzle system to be directed to the teeth and injecting powdered materials to be in contact with a radiation axis of the laser beam around the radiated laser beam such that the powdered materials are melted and integrated with a surface of the teeth.