Patent GB-704620-A (GB)
Title: Arrangement for the continuous casting of metals having high melting points
IPC: B22D11/10
Filed: 1951-04-23
Abstract: 704,620. Continuous-casting machines. JUNGHANS, S. April 23, 1951 [July 25, 1949; July 28, 1949; April 21, 1950; May 6, 1950; June 5, 1950], No. 9389/51. Class 83 (1) Apparatus for the continuous casting of high melting point metals such as iron and steel comprises at least two insulated ladles for conveying molten metal from the melting furnace to the mould, means for controlling the rate of discharge of the ladles, a trough adjustably interposed between the discharging ladle and the mould, spare troughs and means for rapidly interchanging the troughs being also provided. Each ladle 101 is of approximately cylindrical shape with a spout 101a and comprises a metal vessel 103 with two insulating linings 104, 105. There is a similarly constructed cover 102 formed with a slot 102a above the pouring orifice of the spout and with a rear opening, closed by a member 109, through which slag may be removed. Arms 110, 111 bolted to the sides of the ladle carry at their forward ends rollers 114, 115 by which the spout is supported during pouring, while the attaching bolts 112, 113 form lifting-lugs. Preheated ladles are filled from a furnace, carried by overhead means and lowered into a tilting frame with the rollers 114, 115 resting on a fixed standard (not shown). The frame and ladle are tilted by a rope and a winch 7 which can be driven at variable speeds to control the rate of pouring. Two such tilting frames are mounted on a carriage 6 having wheels 9 running on rails 10 so that as soon as one ladle is empty another may be moved into pouring position and the emptied ladle is meanwhile reheated and again filled. The winch is driven by high and low speed motors through an infinitely variable gear and a magnetic coupling. From the ladle the metal is poured into a trough comprising an outer iron shell 401, a refractory lining 401a, a well 402, baffle 405, electrically-heated cover 409 and a pouring orifice 407 positioned over the axis of the mould. In a modified form, Fig. 17, an arcuate strip 503 held in a clamp 504 passes through the pouring aperture to within a short distance of the surface E1 of the metal in the mould. The trough is heated externally by gas or oil. Fig. 3 shows a ladle 1 and trough 11 in pouring position relatively to the mould D, a second ladle 1<SP>1</SP> being in position on the carriage 6 and spare troughs 12, 13 and 14 resting on a carriage 15 running on tracks 18 so that the trough 11 can be rapidly replaced. The carriage 15 is also movable transversely of the rails by a handwheel 22 so as to position the pouring aperture accurately with respect to the mould. In a modification, each trough is mounted on a separate carriage, the carriages running on rails 301, 302 curved in an arc around the mould D as shown in Figs. 11 and 14. Each carriage has wheels such as 308, 310 on inclined axles for running on the rails and rollers 315, 316 supported by depending brackets so as to project upwardly into a central inverted channel-shaped rail 303. A shaft 317 extends through the carriage and may be rotated by levers 319 so that a finger 320 enters one of a series of slots 303a cut in the rail 303 and so holds the carriage in pouring position. The trough is mounted on a platform 328 pivotally mounted at 330 on an intermediate frame supported by rollers on the carriage and movable transversely thereof by arms 339 on a shaft 336 rotatable by levers 338, which arms engage a slot in the intermediate frame.