F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 11/00 (2006.01)
Patent
CA 2755138
A high-temperature furnace for the annealing of sheet-metal joints (4) is described, having an annealing base (2), having a support device (3), which forms a placement surface (17) for coaxially receiving a sheet-metal joint (4) with spacing above the annealing base (2), having a protective hood (6), which coaxially encloses the annealing base (2) with the support device (3), and is connected to a protective gas supply line (10) and a protective gas exhaust, made of a cylindrical jacket (7) and a cupola (16) which terminates the jacket (7) on top, having a peripheral seal (9) between the annealing base (2) and the protective hood (6), and having a heating hood (13) which encloses the protective hood (6) with spacing. In order to allow uniform annealed material heating, it is proposed that the axial jacket section of the protective hood (6) which is determined by the vertical spacing (h) of the placement surface (17) of the support device (3) from the annealing base (2) has a surface which makes up at least three-fourths of the cupola surface.
L'invention concerne un four à haute température pour le traitement de recuit de paquets de tôles (4) comportant une base de chauffe (2), un dispositif de support (3) qui forme une surface de pose (17) pour recevoir coaxialement un paquet de tôles (4) à distance au-dessus de la base de chauffe (2), une cloche de protection (6) constituée d'une enveloppe cylindrique (7) raccordée à une conduite d'amenée de gaz de protection (10) et une conduite d'évacuation de gaz de protection, entourant coaxialement la base de chauffe (2) avec le dispositif de support (3) et une coupole (16) fermant le dessus de l'enveloppe (7), un joint d'étanchéité (9) circulaire entre la base de chauffe (2) et la cloche de protection (6) et une cloche chauffante (13) entourant à distance la cloche de protection (6). Pour permettre un réchauffement uniforme des produits à recuire, la section d'enveloppe axiale de la cloche de protection (6), déterminée par la distance en hauteur (h) de la surface de pose (17) du dispositif de support (3) par rapport à la base de chauffe (2), présente, selon l'invention, une surface qui représente au moins trois quarts de la surface de la coupole.
Brandstaetter Dieter Ch.
Ebner Robert
Ebner Industrieofenbau Gesellschaft M.b.h.
Fetherstonhaugh & Co.
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