Specifications:
GENERAL CHARACTERICTICS (COMMON) Composed of: Heating chamber with metallic exterior housing, refractory work with isolating wall, metallic muffle of refractory steel and electric resistances. Water cooled refrigerating chamber, attached to the exit of the heating chamber. Continous part hauling system along the furnace by means of a mesh conveyor belt, traction of the hauling drum with tensioning rolls and engine-variator group with chain transmission. Generating equipment of protecting atmosphere through incorporatec ammonia dissociator. Control panel with aotumoatic temperature adjusting equipment and all the necessary electrical devices for the control of the facility. DESCRIPTION HEATING CHAMBER Housing. The furnace is composed exteriorly by a metallic housing of thick folded and welded plate. At the front, there is a small prolongation fitted in its free end with an inclined and heingt-adjustable guillotine door. Work.The housing interior ir coated with an isolating refractory layer of high temperature resistance. Such coating is supported directly from the housing to guarantee its rigidity. Between this coating and the housing there is a thick layer of a great isolating power and low specific heat, so that, apart from reducing the heat losses to a minimum value, it is also reduced the thermal capacity of the furnace mass and as a result, its warming up speed is considerably increased. Muffle. The chamber is longitudinally crossed by a metallic muffle built of refractory steel, joined at one end to he cooling off chamber. iNside this muffle, the conveyor belt slides together with the part. Resistance. Heating is electrically through metallic resistance of special ally and supported in the walls, floor and ceiling of the interior chamber, achieving a perfect temperature uniformity. COOLING OFF CHAMBER Directly coupled to the heating chamber and united to the interior muffle following the same alignmet, there is another chamber with a tunnel shape in which interior circulates the conveyor belt together with the parts for their cooling off, once the thermal process has finished. This chamber is formed by a double jacket through which countercurrent water circulates. At the final end there is a inclined and ajustable guillotine door, similar to that at the entry. The assembly is supported independent of the heating chamber so that the components can be easily separated and united to improve the transport system of the facility to be sent to the user. PART TRANSPORTATION The parts are trasnported along the whole furnace by meansof a metallic belt that circulates inside the heating and cooling chambers respectivelly. The belt is of mesh type, of refractory steel of great resistance to high temperatures. It is mounted forming a closed circuit and its return takes place on a tray supported during the whole run under the furnace. Traction is carried out by menas of a drum against which a tensioning roll system presses strongly the belt to eliminate slidesand thus achieve an efficient hauling. This roll system also has the mission to compensate for the belt’s dilatation and contraction. The whole mechanism is activated by a variator-reducer engine group, allowing to adjust at will and within a large margin the belt’s advance speed. ATMOSPHERE GENERATOR The atmosphere generation for the correct treatment of parts is made through an ammonia dissociator whose resulting gas is highly reducer due to its high Hydrogen content. This gas in introduced into the furnace inside the muffle and in the cooling chamber, thus the parts to be treated are sunk during the whole process in this atmosphere. CONTROL PANEL All control and adjusting devices are centralized in a closet attached to the furnace structure and forming a body with it. Thisdisposition spares room, being a compact unit. Manufactured according to CEE standards.– Manufacture of special furnaces by request – Reserved the right to change technical specifications
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