| 摘要 |
The invention relates to a flange profile (1) for connecting two air duct sections of an air duct air-tight, which flange profile is designed as a hollow profile, the cross-section of which is essentially an L-shape and which is made of folded sheet, wherein the L-arms (2, 3) of the flange profile (1) are of double-wall design and have an internal wall (4, 5) and an external wall (6, 7) each. The walls (4, 6) of the first L-arm (2) form an insertion pocket which is open at one end for inserting the wall of one of the air duct sections. The walls (5, 7) of the second L-arm (3) form a receiving chamber (8) for receiving an arm of a corner angle element (17). The second L-arm (3) has at the internal wall (5) thereof, which faces the joint between the air duct sections, a fold (9) which runs along the longitudinal extension of the flange profile (1) and which extends into the interior of the hollow profile to the external wall (7) of the second L-arm (3) and which guides the wall of the air duct section upon inserting said air duct section into the insertion pocket and which has a vertex (11). In order to provide a flange profile that has significantly better stability and sealing properties compared to traditional flange profiles, it is proposed that the external wall (7) of the second L-arm (3) in the transition region to the external wall (6) of the first L-arm (2) has an intermediate section (18) having a rounded shape complementary to the fold (9) and bulging outwardly, wherein the flange profile (1) is deformed after being welded to a wall of the air duct section inserted into the insertion pocket such that the vertex (11) of the fold (9) is pressed against the external wall (7) of the second L-arm (3) in the region of the intermediate section (18) in a planar way. |
