摘要:
Die Erfindung betrifft ein Verfahren und einen Durchlaufofen (1) zum Erwärmen von Gegenständen (15) insbesondere flachen Kassetten für Sandwichelemente, auf eine vorgegebene Prozeßtemperatur, die beispielsweise durch eine nachfolgende Beschäumstation bestimmt sein kann. Erfindungsgemäß ist der Durchlaufofen in eine Mehrzahl bei einer Betriebsunterbrechung mit abgestuft gedrosselten Leistungen betreibbare Ofenzonen (11-14) aufgeteilt. Durch Einstellung einer geeigneten Zonenpausentemperatur in den jeweiligen Ofenzonen (11-14) kann eine Überhitzung der vorzuwärmenden Gegenstände (15) bei vorübergehenden Betriebsunterbrechungen vermieden werden.
摘要:
A continuous furnace with an extended through tunnel (2) has a chute (3) for the material throughput. At the through tunnel (2) there are a first distance detector (12) and a second one (18) at a spaced away from the first. By means of the first distance detector (12) it is possible to find the distance (L1) of a measurement object (4a) on the chute (3) from a first reference point (13) on the chute (3) allocated to the first distance detector (12) and with the second distance detector (18) can be found the distance (23) of a measurement object (4b) on the chute (3) from a second reference point (14) on the chute (3) allocated to the second distance detector (18). The two reference points are spaced apart. The two distance detectors form a safety device to detect backing-up of the material throughput.
摘要:
A continuous furnace with an extended through tunnel (2) has a chute (3) for the material throughput. At the through tunnel (2) there are a first distance detector (12) and a second one (18) at a spaced away from the first. By means of the first distance detector (12) it is possible to find the distance (L1) of a measurement object (4a) on the chute (3) from a first reference point (13) on the chute (3) allocated to the first distance detector (12) and with the second distance detector (18) can be found the distance (23) of a measurement object (4b) on the chute (3) from a second reference point (14) on the chute (3) allocated to the second distance detector (18). The two reference points are spaced apart. The two distance detectors form a safety device to detect backing-up of the material throughput.
摘要:
A billet heating furnace of the enclosed skid type comprises a feed mechanism (47) for regularly adding to and pushing a row of billets along a skid (31) extending through a furnace chamber (22) which is formed by a lower section (1) and an upper section (2) hinged to the lower section so that the chamber can be opened and closed. The furnace is heated by at least one high velocity premix gas burner (28) mounted in the upper section of the furnace chamber and controlled so as to raise and maintain an operating temperature in the chamber which is higher than the melting temperature of the billets and which is effective to raise the temperature of the billets passing through the furnace chamber to a suitable stamping temperature. At the outlet end of the furnace chamber the heated billets move onto a delivery path (55, 56, 57) for passage to a press. Along this path there is a billet detector (58 to 63) which responds to any interruption of the regular passage of billets to shut down the burners. The furnace chamber (22) is lined with ceramic fibre material (21) having a low thermal mass such that, if the burners (28) are shut down and there are billets stationary in the furnace chamber, the temperature in the chamber will fall I to below the melting temperature of the billets before the temperature of the billets can rise to the melting tempera- , ture. At the same time as the burners are shut down, a slide (64) in the delivery path (65) is opened so that any billets subsequently leaving the furnace chamber will be directed down a reject chute (66) until the furnace operator decides that the feed to the press is ready to be recommenced.
摘要:
A system for applying a heat-shrinkable sleeve or label to a container such as a vial for pharmaceuticals includes a novel heat tunnel assembly. The heat tunnel assembly, in a preferred embodiment, includes a conveyor for moving the sleeved containers past a heat source. The container has a plurality of rollers upon which the sleeved containers are supported and rotated. The rollers turn at a first rate during initial shrinkage of the sleeve, and at a second, slower, rate after the initial shrinkage has occurred to reduce distortion and unwanted displacement of the label during its application. The heat tunnel assembly also includes a system for withdrawing the heat source from the vicinity of the conveyor should unexpected circumstances arise.
摘要:
An alignment measuring system is used in determining the location of the rotational centre line of a long, cylindrical body having a number of support bearings spaced along its length, during the rotation of the body. The method particularly lends itself to the re-alignment of hot kilns, during their operation, without requiring shut down and the consequent disruption and loss of product. The system utilizes a base line or datum on each side of the kiln for locating the measuring instrument. The distance measuring instrument is a radiant beam instrument such as a diode laser providing an electronic readout, to enable accurate determination of the distance of the outer surface of the kiln shell from the instrument, and hence the location of the rotational centre relative to the established baseline datum, for the longitudinal station being measured. A series of lateral centre line determinations thus made along the length of a kiln, and including a like determination of the height of the centre line at each measuring station, permits adjustment to selected ones of the kiln support bearings to align the rotational centre line along the length of the kiln, including the correction of centre line elevations.
摘要:
A continuous sintering furnace has an entrance-side deaerating chamber (23) through which trays (22) carrying a material (1) to be sintered may pass, preheating, heating and cooling zones (37, 38 and 39) into which the trays (22) are sequentially fed from the deaerating chamber (23), an exit-side deaerating chamber (26) through which the trays (22) having passed through the cooling zone (39) may pass, a pusher (35) for pushing the trays (22) from the deaerating chamber (23) to the preheating zone (37), a puller (36) for pulling the trays (22) from the cooling zone (39) to the deaerating chamber (26), an intermediate puller (43) for pulling the trays (22) from the heating zone (38) to the cooling zone (39), a vertically movable door (28) between the deaerating chamber (23) and the preheating zone (37), a vertically movable intermediate door (41) adjacent to the door (28) and arranged at the upstream end of the preheating zone (37) in the direction of movement of the trays (22), a vertically movable intermediate door (42) between the heating and cooling zones (38) and (39) and a vertically movable door (29) between the cooling zone (39) and the deaerating chamber (26). When the door (42) is in its closed position, heat flow to the cooling zone (39) is suppressed. Movement of the trays (22) in the cooling zone (39) is effected by the intermediate puller (43), thereby decreasing the number of trays (22) to be moved by the pusher (35).