US3364979A - Continuous casting machine - Google Patents

Continuous casting machine Download PDF

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US3364979A
US3364979A US459202A US45920265A US3364979A US 3364979 A US3364979 A US 3364979A US 459202 A US459202 A US 459202A US 45920265 A US45920265 A US 45920265A US 3364979 A US3364979 A US 3364979A
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casting
annular
groove
mold
flange
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Carton Jean
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Compagnie Francaise Thomson Houston SA
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Compagnie Francaise Thomson Houston SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
    • B22D11/0617—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires the casting wheel having its axis vertical and a casting strip formed in a peripheral groove of the wheel

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  • the mold is supported with the lower end of its cooling flange resting freely on a centerless annular support (28) mounted on rollers (52) and driven in rotation through roller (60).
  • Annular walls (38, 40) upstanding from support (28) define an annular trough in which a body of cooling liquid is formed to a controlled depth in which the cooling flange (26) of the mold (2) is immersed.
  • Molten copper is poured into the casting from tundish (12) and solid copper rod is continuously extracted from the groove at (16) and directly passed to ahot-rolling mill (20), FIGURE 1.
  • This invention relates to the continuous casting of metals in the form of elongated elements or rods of indefinite length and uniform cross section.
  • the invention is more especially concerned with the continuous casting of non-ferrous metals, particularly copper, into rods capable of being directly hot-rolled and processed (e.g. drawn) into wire, strip and other metal products progressively as they solidify.
  • Wire-bars which are thick oblong bars of rectangular cross section.
  • Such wire-bars may he, say, about 1.3 meters long and may weigh from 60 to 140 kilograms. These are first heated to a temperature in the range of BOO-900 C. and hot-rolled into rod stock of from 6 to 12 millimeters diameter. This may require up to twenty rolling passes or more. The hot-rolled rod, after cleaning and pickling, is passed to the wire-drawing machines where it is reduced to its desiredfinal diameter which may range anywhere from some millimeters to the order of one hundredth of a millimeter in size.
  • the copper could be cast not as separate bars, but instead in the form of a continuous rod capable of being passed directly as it solidifies from the casting apparatus to the initial processing stage such as hot-rolling mill.
  • the saving in space, equipment, labour and energy would be immense.
  • the chief ditficulties encountered have concerned the thermal conditions in the system.
  • the molten copper is poured into the casting groove at a temperature of say 1150 -C. It must be completely solidified at its point of emergence from the groove, about three quarters of a circumference beyond the pouring point. However, it must not be allowed to solidify too far ahead of its point of emergence since otherwise it could not be pulled out from its arcuate shape in the groove to a straight condition without cracking.
  • the optimal temperature range at which the copper rod should be extracted in order to be passed directly to a hot-rolling mill is 800 C. surface temperature and not more than 900 C. core temperature. The maintenance of these conditions requires energetic cooling as well as precise thermal control near the casting groove and around the periphery of the casting wheel.
  • the rim of the casting wheel or annular ingot mold has a cross sectional shape whichincludes a massive head portion with an upwardly-open casting groove therein, and a relatively long and slender flange or cooling fin of tapered shape depending from the head portion.
  • the annular mold is centreless, that is, free from any web, spokes, arms or the like radially inward of the rim, so that said rim with the casting groove therein is free to expand in an uninhibited manner circumferentially.
  • This centreless annular mold is supported for rotation about an ideal axis which is generally vertical, and for this purpose said mold is made to rest with the lower end of its depending cooling fin freely engaging under gravity the flat top of an annular supporting member, which is driven in rotation by suitable means such as rollers.
  • suitable means such as rollers.
  • For cooling the mold there are provided walls defining an annular trough on the top of the supporting member, containing a body of cooling liquid, generally water, in which said cooling fin is immersed.
  • the annular supporting member preferably also is in the form of a centreless ring, e.g. of cast steel, and is supported and driven so as to be freely expansible relative to its stationary support structure, whereas the copper casting wheel is in turn freely expansible relative to the annular cast-steel supporting member.
  • the annular mold is preferably made of copper for maximum conduction of heat, and its slender tapered fin provides a path for the rapid dissipation of heat from the casting groove to the surrounding Water.
  • the relatively much more massive head, in which the casting groove is formed possesses easily and accurately the body of cooling liquid in the trough.
  • the provision for free independent expansion of the continuous casting retains a thermal inertia and thus stabilizes the temperature of the metal in the casting groove, resulting in a steady, continuous decrease in temperature around the circumference from the point at which the moltenmetal is poured to the a point at which the solid rod is withdrawn.
  • the final temperature of the metal at this point of withdrawal can be adiusted as by varying the depth of steel or cast iron annular supporting member and the copper annular mold prevents darn-aging distortion to the parts of the casting machine and ensures that the uniform undistorted cross section throughout.
  • FIG. 1 is a perspective view, somewhat simplified, of the main parts of an improved continuous copper casting machine
  • FIG. 2 is a larger-scale View in perspective and in section generally on line 11-11 of FIG. 1 further showillustrated in FIG. 1;
  • FIG. 3 is a cross sectional view showing in detail a preferred contour used for the annular casting mold
  • FIG. 4 is a cross section, generally on the line IV-IV of FIG. 1, on an enlarged scale;
  • FIG. 5 is a small-scale schematic plan view of the machine and shows in phantom the positions assumed by the casting wheel and other parts at elevated casting temperature, the displacements from the full-line positions being considerably exaggerated for clarity;
  • FIG. 6 is a large-scale perspective View of the extractor device associated with the casting wheel
  • FIG. 7 is a large-scale fragmentary view in cross section of. the casting groove and casting therein and illustrates a heat-isolating coating lining the walls of the groove, in exaggerated form;
  • FIG. 8 is a partial view on a scale larger than that of FIG. 1, showing the casting wheel and its supporting means in cross section and the ladle and feeder tank in elevation together with the movable mounting means for the feeder tank.
  • the continuous copper casting machine illustrated includes as an essential component a revolving annular ingot mold or casting wheel 2 supported for rotation in the direction indicated by the arrow A in FIG. 1 in a generally horizontal plane, through means later described.
  • the annular mold 2 is formed in its upper surface with an annular casting groove 4.
  • a conventional casting ladle 6 containing a body of molten metal, in this instance copper, supplied thereto at a suitable casting temperature from an appropriate melting furnace not shown.
  • the ladle '6 is supported on a frame generally designated 8 by way of the horizontally aligned pivots 10 for rotation about a horizontal rocking axis, whereby the molten contents of ladle 6 can be poured into a regulating feeder tank or tundish 12 which is sup ported from frame 8 in a position such that a bottom outlet orifice of tundish -12 directly overlies at all times a point of the casting groove 4 in the annular mold 2.
  • the supporting means for tundish or feeder tank 12 will be later described in detail.
  • the molten metal can thus 4,. be made to flow as a regular uniform-rate stream the casting groove 4, and as the casting wheel 2 revolves, a charge of molten metal isthus continuously deposited into the casting groove.
  • the metal thus deposited into the casting groove 4 rather rapidly cools and solidifies as it is carried around- .with the revolving mold 2, so that at a point situated some three fourths of a circumference or so beyond the point at which the stream of molten metal is poured, the metal has solidified.
  • the continuous solid copper rod is stripped from the casting groove t by means of an extractor device generally designated 16 and later described in detail.
  • this extractor device consists of a stationary ramp or wedging member inserted into the groove 4 so as to lift the solidified metal rod out of the groove.
  • the continuous rod 18 thus extracted is shown as being fed directly to the rolls of a conventional hot rolling mill 2i). i
  • the reference 22 designates a sprayer device, schematically shown, positioned to overlie the groove 4 in the are I thereof beyond the extracting station 16 and ahead of the casting station 14; and serving to spray a suitable lubricant composition into the empty casting groove as later described in greater detail.
  • I 1 a a The annular ingot mold 2 is formed with a cross sectional contour clearly shown in FIG. 3 as including a relatively massive upper head part 24 in which thecasting groove 4 is formed, and a relatively thin, downwardly tapered circumferential flange 26 extending downward from the head 24.
  • a supporting and cooling assembly for the annular mold 2 is shown as comprising an annular support member 28 which may be a steel or iron casting and has the general cross sectional shape of an inverted channel. Secured to the fiat upper surface of the member 28 are a series of supporting blocks or shims 30 which extend radially across the annular upper surface of member 28 and are spaced. circumferentially. around that surface. The blocks 30 have flat upper surfaces over a major intermediate portion of their extent, and tap er down at their ends as shown at 32.
  • the annular mold 2 is supported on the shims 30 atop the member 28 under its own weight, with the lower end surface of flange 26 resting upon the flat upper surfaces of the shims 30 substantially centrally thereof.
  • one or more radially extending key elements such as the one shown at 34' in FIG. 2 are secured to the upper surface of member 28 in'addition to the shims 30, and project upwardly into a complementary notch 36 formed in the lower end part of the flange 26 of the the upper surface'of member 28.
  • ingot mold 2 remains at all times connected for bodily rotation with its supporting member 28 as the latter is driven in rotation through means to he later described.
  • An annular trough for a cooling liquid is defined atop the supporting member 28 and around the flange 26 of the ingot mold by a pair of annular walls 38 and 40 made of steel strip, 'aifixed to the vertical sides of the supporting member 28 and projecting upwardly thereabove.
  • the trough thus defined contains a body of cooling liquid, such as water substantially free from mineral salts capable of depositing as scale over the side surfaces of flange 26 and interferring with heat transfer.
  • Means are provided for maintaining the level of cooling water 46 in the trough at a constant, adjustable height, and include a feed pipe 42 and a discharge pipe 44 supported at stationary posiinto 5 tions through means not shown and having their ends bent as shown to project downwardly into opposite sides of the trough.
  • the feed pipe 42 may be connected to a constant-delivery pump, not shown, and discharge pipe 44 may be similarly connected to a pump, not shown, which will operate whenever the level of the water 45 reaches up to the end orifice of the pipe 44.
  • Means including a sealed mechanism casing 47 and handwheel 49 are provided for adjusting the vertical position of discharge pipe 44 thereby to maintain the level of the liquid at a correspondin position. It will be understood that any suitable means other than those just described may be provided for maintaining the level of the cooling liquid 46 in the trough at an adjustable elevation.
  • the water delivered by the feed pipe 42 rapidly fills the bottom of the trough on both sides of the cooling flange 26 of the ingot mold owing to the gaps provided beneath said flange between the circumferentially spaced supporting shims 30 and that the response to any readjustment of the water level is very rapid especially owing to the fact that the trough is revolving whereas the pipes 42, 44 are stationary.
  • the degree of control thus obtained over the temperature in the ingot mold 2 is etficient, sensitive, and precise.
  • a change of one centimeter in the hei ht of the water level 46 in the trough was found to produce a consistent variation of about 50 C. in the temperature of the metal in the ingot mold.
  • the water level 46 in the trough may be automatically regulated to maintain the output temperature of the casting at a prescribed value.
  • a temperature sensing member 51 such as a thermocouple contacting a side of the rod 18 as it issues from the casting groove beyond extractor 16.
  • the output conductors. 53 of temperature senser 51 provide the electrical signal input to a conventional SEI'VO-IllOiOI unit 55 which may include an amplifier and reversible motor operating the handwheel 49 through a. drive connection schematically indicated at 57 so as to raise or lowe the outlet pipe 44.
  • the shims 30 constitute a convenient means of providing the necessary liquid passages over the surface of the bottom of the trough across the flange 25 to ensure the establishment of the requisite hydrostatic balance in the body of liquid on both sides of said flange, other means may be used for this purpose, such as by providing circumferentilaly spaced cutouts in the lower edge of the flange 26.
  • annular hood 48 of inverted channel shape in crosssection is suspended from stationary overhead structure 49 as by means of the suspension rings t ⁇ and hooks or other means.
  • the sides of the annular channel-shaped hood 48 project downward into the body of water 46 in the cooling trough thereby defining a gastight annular tunnel surrounding the ingot mold 2 and the metal cast in the casting groove 4.
  • the stationary hood 48 may be provided with suitable apertures, not shown, for the pouring of the stream of molten metal from tank 12 into the groove and for the withdrawal of the solid continuous rod 18.
  • the cooling water 46 heated by the flange 26 of the ingot mold generates considerable amounts of steam which displace the air from the interior of the hood 48 and inexpensively provide a desirable nonoxidizing atmosphere for casting copper and other metals.
  • means may be connected with the hood 48 for circulating some other desired atmosphere through it, such as an inert gas.
  • the hood 48 may be removed entirely and the whole process carried out in free atmosphere.
  • the means for rotatably supporting the assembly including the annular mold 2 and its supporting and cooling means will now be described.
  • the rotatable supporting means are shown as including three pairs of rollers 52 angularly equispaced around the circumference of the annular structure as shown in FIGS. 1, 4 and 5.
  • Each pair of rollers 52 comprises two aligned, frustoconical rollers 52a and 52b freely rotatable on a common generally horizontal shaft 54 and having their peripheral surfaces defining a common conical surface.
  • the two rollers 52:: and 52b of each pair are engaged by the lower end surfaces of the outer and inner walls 28a and 28b respectively, of the channel-shaped supporting member 28. It will be noted that said walls 28a and 28b are bevelcut to unequal lengths so as to conform to the common conical surface defined by the rollers 52:: and 521).
  • each pair of rollers 52 there is associated a roller 56 freely rotatable on a vertical shaft 58 and engaging the outer vertical surface of the radially inner wall 28b of the member 23.
  • the horizontal shaft 54 and the vertical shaft 58 of each of the three sets of three supporting rollers described may be supported from a common fixed frame structure of suitable character, not shown. It will be noted that the arrangement described provides for the rotational support of the entire annular structure about an ideal axis of revolution without having to materialize such axis physically as a shaft.
  • the steel annular support member 28 is thu allowed to expand circumferentially with temperature, and in so doing its flanges 28a and 28b will shift radially over the rollers 52a and 52b.
  • the rollers being separately rotatable about their common shaft 54, the contact thereof with the respective flanges 23a and 23b is substantially slip-free.
  • the supporting structure (not shown) for the shafts 54 and 58 of the three sets of supporting and centering rollers 52 and 56 may be so arranged that the entire annular assembly is supported in a substantially horizontal plane for rotation about a vertical axis.
  • said supporting structure may be so arranged that said annular assembly is supported in a general plane tilted to the horizontal, in a direction away from the casting station at which the molten metal stream pours into the casting groove 4 of ingot mold 2, thereby opposing any tendency to backflow of the molten metal as it enters the groove 4 with a tangential component in the direction of arrow A as earlier described.
  • cans are provided for imparting rotation to the annular assembly comprising support 28 and the ingot mold 2 resting upon it.
  • the cylindrical vertical surface of the radially inner wall 28b of the annular member 28 is engaged by a friction roller 60 secured on the vertically projecting shaft of a suitable motor 64 mounted on the fixed frame structure.
  • the outer surface of the radially outer wall 28a of annular member 28 is engaged by a backing roller 66.
  • Roller 66 is mounted for free rotation by a compression spring 74 thereby urging the backing roller 66 into resilient pressure engagement with the wall 28a and urging wall 28b against drive roller 60.
  • the backing pressure exerted by roller 66 is made adjustable through displacement of a movable abutment member, not shown, abutting the rear end of spring 74 and preferably comprising a screw and nut device supported from the frame member 72.
  • the drive arrangement thus described is simple and efficient, and at the same time permits free circumferential or radial expansion of the annular supporting member 28 with temperature, owing to the virtually point character of the areas of engagement between said member and the respective drive and backing rollers 60, 66.
  • the steel annular member 28 expands radially to assume the form shown (in an exaggerated manner) in- FIG. in broken lines, in which the radially inner surface of member 28 no longer vengages the centering rollers 56 but still rides freely on the supporting rollers 52 as earlier explained.
  • the extractor device generally designated 16 in FIG. 1 will now be described in greater detail with reference to FIG. 6. As known per se and as indicated earlier herein,
  • the extractor device 16 includes a wedge-shaped member 7 6 of such transverse dimension as to be freely insertable into the bottom of the casting groove 4, and having an upper surface tapering down into the direction of movement of the ingot mold 2 indicated by arrow A.
  • the larger end of the wedge member 76 is pivoted on a transverse horizontal shaft 78.
  • the shaft 78 is mounted on suitable supporting structure, not shown, which is gennerally stationary but permits sufficient freedom of motion for said shaft 78 to allow the lifter member 76 to remain properly positioned within the groove 4 regardless of thermal expansion and contraction of the annular ingot mold 2.
  • the feeder tank or tundish 12 while being mounted in a generally stationary manner from the frame 8 as earlier indicated, is arranged to be capable of freely following the displacements of the casting groove 4 as the ingot mold 2 expands and contracts with changes in temperature.
  • the feeder tank or tundish 12 is secured on a truck 80 movable on a bracket 82 secured to a side of the ladle structure 6 and projecting above the casting wheel 2.
  • the truck is provided with rollers 84 riding on rails 86 attached to the horizontal top of the bracket 82 in a direction radial to the casting wheel.
  • a pivot shaft 88 projecting vertically downward from the truck 80 has a follower roller 90 pivoted to its lower end so as tobe engageable with the cylindrical inner surface of the casting wheel 2.
  • the follower roller 90 is biassed into engagement with the casting wheel 2 by means here shown as a compression spring 92 having its ends engaging suitable seating surfaces on the bracket 82 and truck 80*.
  • a counterweight may be used as the biassing means.
  • the arrangement is such that when follower roller 90 is engaging the rim of the annular casting member 2 as shown, the pouring outlet 94 of the feeder tank is positioned substantially centrally of the casting groove 4. It will be evident that with this arrangement, the stream of molten metal will be properly delivered into the casting groove regardless of any distortions of the casting member 2 and its supporting member 28 due to temperature variations.
  • the upper rim or head part of the cross section of the ingot mold is relatively massive. This is necessary in order to impart the desired dimensional and thermal stability to the casting groove 4 therein and to the ingot mold as a whole.
  • said rim or head part 24 is approximately octagonal in outer contour (disregarding the groove 4).
  • the flange 26 In contrast to the massive rim or head part 24, the flange 26 must be relatively long and slender in order to achieve the desired rapid rate.
  • cross sectional contour of the annular ingot mold 2 is conically angled to the general axis of symmetry of the annular mold, in a downward-outward sense. That is,
  • this axis AA is tilted downwardly away from the central axis of revolution of the annular mold, indicated at OO.
  • the surface of revolution generated by the symmetry axis AA of the cross sectional outline about the symmetry axis 00 of the entire ingot mold isna cone whose apex lies above the general plane of the ingot mold.
  • the molten metal initially poured into the casting groove at 14 is highly fluid, and the centrifugal force created by the rotation of the mold about its centre axis 00 therefore causes the free upper surface of the metal in the groove 4 to slant upwardly in the radially outward direction, away from centre axis 00.
  • the resulting casting would have an asymmetrical cross sectional contour in which the top and bottom surfaces would not be parallel.
  • the casting groove 4 has substantially straight side surfaces 102 which diverge slightly in the upward direction symmetrically to the opposite sides of the groove symmetry axis BB, in order to facilitate withdrawal of the solidified casting from the groove.
  • This angle of divergence or taper may be of the order of 2 on each side, as here indicated.
  • the sides 102 of the casting groove connect with the bottom 100 of it by way of rounded corners, as shown, the radius at each corner being preferably about 2 mm. This radius is substantially the same as the radius assumed due to surface tension at the lines of contact of the upper free surface of the molten metal with the sides 102 of the casting groove.
  • the inner surfaces of the casting groove 4 are coated with a thin layer of a suitable heat-insulating and refractory substance, such as any of various silicates, aluminates or bentonite.
  • This coating has the dual function of preventing overheating of the mold and over-cooling of the metal, and the coating thickness is determined by test to obtain optimum temperature conditions in the casting at the point of its extraction from the casting groove.
  • these optimum conditions are such that the cast rod as it is withdrawn at the extraction station 16 is fully solidified to the core, and is still at a surface temperature not substantially less than about 800 C. (a suitable range of temperatures throughout the cross section of the trapezoidal rod is from 800 to 900 C).
  • the continuous rod as it issues from the ingot mold can be directly passed through the hot-rolling mill 20 without having to be reheated, with considerable advantage to the overall economy of the process.
  • a generally suitable range of thicknesses for the heatinsulating lining just mentioned is from 0.1 to 0.5 millimeter. It has been found however that for best results the thickness of this lining, as indicated at 104 in FIG. 7, is preferably not uniform, but is somewhat greater in the upper or outer parts of the groove sides 102 and then 7 tapers down to a uniform value along the bottom surface of the groove. This precaution serves to oppose a tendency to a premature cooling of the metal as it first contacts the side walls 102 and consequent defects such as cracks in the casting. Alternatively, a similar result can be obtained by imparting to the groove sidewalls an incurvated contour somewhat as indicated in dotted lines at 102 in FIG. 7. In this figure, reference 106 indicates the cast metal in the groove 4.
  • a thin film of lubricant such as colloidal graphite, serving to prevent adhesion of the solidified metal to the underlying surface.
  • This lubricant coating is applied continuously during the casting process, as already indicated, by means of the sprayer unit 22. in the casting groove 4 in the empty arcuate segment thereof between the extractor station 16 and the pouring station 14. The rate of delivery of the sprayer 22 is adjusted to coat the inner surfaces of the groove 4 with a thin film which may be of the order of a few hundredths of one millimeter in depth.
  • the cross sectional shape of the mold was substantially as shown in FIG. 3, the groove 4 being about 22 mm. deep and formed and dimensioned to provide a finished rod having a trapezoidal cross section 13.5 mm. in altitude and 13.5 mm. average width.
  • the conical angle in the cold condition of the mold was 2, and the slant angle 9 of the groove bottom 100 to the symmetry axis AA of the cross section was 140.
  • the head portion 24 was 55 mm. thick and the flange 26 tapered down from 30 mm. to 10 mm. over a length of 70 mm.
  • the cooling system described was operated to maintain a body of water between 30 and 70 mm. deep in the annular trough surrounding the cooling flange 26. Under these conditions it was found that the metal in the casting groove 4 cooled at a rate such that the rod emerging at extractor station 16 had just solidified to the core but its surface temperature was still somewhat above 800 C.
  • the rod was seen to possess a highly regular trapezoidal cross section, with its top and bottom surfaces substantially parallel. The cross section was strictly uniform throughout the length of the rod, about 600 meters for a one-ton copper melt.
  • the crystal structure of the casting was excellent, fine-grained and free from oxidation, occlusions, cracks, blow-holes and other defects.
  • the cast rod must have solidified to the core before it can be extracted, yet it must not have solidified too far ahead of its point of extraction since in such case it would set in a curved state owing to the curvature of the annular mold, and it would then tend to crack as it is straightened out by extractor 16. Also, the rod should preferably be at a temperature where it can be directly hot-rolled without reheating.
  • the cross sectional shape of the annular mold includes two sections differing radically in their geometric and physical characteristics: a relatively massive head or rim portion having the casting groove formed in it, and a slender cooling fin integrally depending from the head and immersed a controllable depth in cooling water.
  • the cooling fin assures efiicient dissipation of heat from the casting groove to the cooling medium at a controllable rate, while the massive head owing to its large moment of inertia imparts thermal as well as dimensional stability to the casting groove and the molten metal therein.
  • the thermal inertia of the head section surrounding the casting groove ensures that the temperature in the casting groove will at no time tend to change abruptly but will present a steady, continuously decreasing gradient all the way from the pouring station to the extracting station, so that the final temperature of the casting at the extracting station remains always perfectly well determined and fully controllable.
  • the centreless annular mold of the invention is preferably made of copper for optimal conduction of heat through its cooling 'fin as explained in the foregoing paragraph, it is contemplated that the mold is supported and driven by resting under its own weight upon an annular supporting member of cast steel, with provision for free expansion of the copper mold and steel supporting annulus independently of one another, thereby preserving the feature of free circumferential expansibility of the copper mold, and with further provision for driving the supporting annulus 12 and mold in bodily rotation without interfering with the free expansibility. of either annular part.
  • ancillary devices of generally conventional character may be associated with the casting machine.
  • suitable guiding means and draft tension-control arrangements may be interposed between the extracting station 16 and the hot-rolling stand 20, and may serve-to impart a controllable retarding force to the rod 18. as it issues from the extractor.
  • Servo-mechanism of conventional type may be provided for automatically controlling the rateat which molten metal is poured from the feeder tank'12, and/ or the rate of rotation of the casting wheel 2 from drive motor 64, in order to regulate the vertical dimension of the continuous cast rod.
  • Such servo-mechanism may be tied in with the servo means earlier described herein for controlling the depth of cooling water in the trough.
  • a continuous metal casting machine comprising:
  • annular casting member in the form of a circumferential-ly continuously integral centreless rim positioned in a generally horizontal plane and having a cross-sectional contour including a massive head POI.
  • cooling fin portion comprising a relatively long and slender flange of a material having high heat conductivity extending front a substantially central area of the undersurface of said head portion;
  • mounting means comprising a supporting member having a generally flattop and means driving said supporting member in rotation about said generally vertical axis, the casting member resting upon, the supporting member with the lower end of said flange of the depending cooling fin freely engaging said flat top so as to be driven in rotation circumferentially with the supporting member while being freely movable radially with respect thereto under forces of differential thermal expansion and contraction; means for retaining a body of cooling liquid atop the supporting member in which said cooling fin portion of the casting member is immersed with both outer sides of said flange being contacted by the liquid; and
  • a continuous casting machine comprising:
  • annular casting member in the form of a centreless rim positioned in a generally horizontal plane and having a cross-sectional contour including a massive head portion with an upwardly open casting groove therein and a relatively long and slender cooling flange portion depending therefrom;
  • annular trough means disposed coaxially with and under said casting member with the lower end of said 13 means for pouring molten metal into the casting groove at one point of its rotational path and means for extracting a continuous casting from the groove at another point of its path; whereby said massive head portion with molten metal in the groove thereof will undergo in operation considerably greater thermal expansion than said slender cooling flange immersed in the cooling liquid and the casting member will consequently be distorted so that said head portion thereof is rotated radially outward relative to the cooling flange portion; and said casting member being formed so that the crosssectional contour thereof at ordinary temperature has an axis of symmetry inclined to said axis of rotation in a downward-outward direction an angular amount such as to cancel said distortion and render said cross sectional contour substantially vertical under casting temperature conditions.
  • said casting groove has a generally flat bottom wall slanting at a small angle downward in the radially inward direction relative to said cross sectional contour.
  • casting groove has a generally trapezoidal cross sectional contour with side walls diverging upward from perpendicnlars to said bottom wall.
  • a continuous casting machine comprising: an annular casting member in the form of a circumferentially continuously integral centreless rim having a massive head portion with an upwardly-open annular casting groove formed in the top thereof and a relatively long and slender annular cooling flange depending from a substantially central area of said massive head portion at least said flange being made of a material having high heat conductivity;
  • annular trough means disposed coaxially with and under the casting member with the lower end of the cooling flange resting on a bottom surface of the trough; means for delivering cooling liquid into the trough at one point and withdrawing liquid from the trough at another point, including means for varying the depth of the body of liquid in the trough, said liquid contacting both outer side surfaces of said cooling flange;
  • servo-means connected with the temperature sensing means and connected with the depth varying means to increase the depth of cooling liquid when the sensed temperature rises and decrease said depth when the sensed temperature decreases.
  • a continuous casting machine comprising:
  • annular casting member in the form of a circumferentially continuously integral centreless rim having an annular upwardly-open casting groove in the top thereof and a cooling flange portion depending from a substantially central area of said massive head portion at least said flange being made of a material having high heat conductivity;
  • annular trough means underlying the casting member generally coaxially therewith with the lower end of the flange portion resting on a bottom of the trough means;
  • a continuous casting machine comprising:
  • annular casting member in the form of a circumferentially continuously integral centreless rim having a massive head portion with an annular upwardlyopen casting groove in the top thereof and an annular cooling flange depending from a substantially central area of said massive head portion at least said flange being made of a material having high heat conductivity;
  • said mounting means comprising an annular supporting member having a generally flat top upon which the lower end of the cooling flange rests freely under gravity whereby the casting member is circumferentially rotatable with the supporting member while being freely movable radially thereof under forces of differential thermal expansionand contraction;
  • a driving roller engaging one peripheral side surface of the annular supporting member and a backing roller engaging an opposite peripheral side surface of the supporting member in radial alignment with the driving roller and motor means for rotating the dirving roller to rotate the supporting and casting members about said axis while permitting free circumferential expansion of the supporting member;
  • a continuous casting machine comprising:
  • annular casting member in the form of a circumferentially continuously integral centreless rim having a massive head portion with an annular upwardlyopen casting groove in the top thereof and an annular cooling flange depending from a substantially central area of said massive head portion at least said flange being made of a material having high heat conductivity;
  • annular trough means underlying the casting member generally coaXially therewith with the lower end of the flange freely resting under gravity on a bottom surface of the trough;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US459202A 1964-06-09 1965-05-27 Continuous casting machine Expired - Lifetime US3364979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR977539A FR1434123A (fr) 1964-06-09 1964-06-09 Perfectionnements apportés aux dispositifs de coulée en continu de métaux non ferreux

Publications (1)

Publication Number Publication Date
US3364979A true US3364979A (en) 1968-01-23

Family

ID=8831919

Family Applications (2)

Application Number Title Priority Date Filing Date
US459202A Expired - Lifetime US3364979A (en) 1964-06-09 1965-05-27 Continuous casting machine
US684105A Expired - Lifetime US3478810A (en) 1964-06-09 1967-11-20 Continuous copper wire-making process

Family Applications After (1)

Application Number Title Priority Date Filing Date
US684105A Expired - Lifetime US3478810A (en) 1964-06-09 1967-11-20 Continuous copper wire-making process

Country Status (10)

Country Link
US (2) US3364979A (fr)
AT (1) AT254417B (fr)
BE (1) BE665050A (fr)
CH (1) CH430959A (fr)
DE (1) DE1483546A1 (fr)
ES (1) ES313942A1 (fr)
FR (1) FR1434123A (fr)
GB (1) GB1107054A (fr)
NL (1) NL6507140A (fr)
OA (1) OA01744A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731536A (en) * 1968-12-07 1973-05-08 Demag Ag Apparatus for continually measuring the temperature of a continuously cast metal rod
US5404931A (en) * 1990-02-15 1995-04-11 Nippon Steel Corporation Apparatus for making strips, bars and wire rods
CN117684011A (zh) * 2024-02-02 2024-03-12 陕西天成航空材料股份有限公司 一种真空电子束冷床炉用铸锭冷却装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948818B1 (fr) * 1970-05-18 1974-12-24
DE3111057C2 (de) * 1981-03-20 1984-09-27 Gosudarstvennyj naučno-issledovatel'skij proektnyj i konstruktorskij institut splavov i obrabotki cvetnych metallov "Giprocvetmetobrabotka", Moskva Ringförmige, sich horizontal erstreckende Stranggießkokille
US4465120A (en) * 1983-01-17 1984-08-14 Southwire Company Inclined wheel and belt casting machine
CN110665990B (zh) * 2019-09-30 2020-09-11 江西振鹰智能科技有限公司 一种铜合金线材及其制备方法和包含该线材的电缆
CN116900273B (zh) * 2023-09-13 2023-12-22 绵阳市军豪科技开发有限公司 一种内凹腔多鳍片压铸件成型模具及成型方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US359348A (en) * 1887-03-15 Mechanism for forming ingots
US368817A (en) * 1887-08-23 Mechanism for producing ingots
US405914A (en) * 1889-06-25 Wire-solder machine
CH125883A (de) * 1925-03-17 1928-06-01 Julius Zueblin Vorrichtung zum Giessen von Barren, Platten etc., insbesondere von Aluminium.
US1902559A (en) * 1931-12-03 1933-03-21 Kingston Products Corp Mold
US2659949A (en) * 1951-11-08 1953-11-24 Properzi Ilario Machine for the continuous casting of metal rods
CA528359A (fr) * 1956-07-31 B. Brennan Joseph Coulee de metaux
US3284859A (en) * 1963-10-14 1966-11-15 Phelps Dodge Copper Prod Circular trough casting apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR735035A (fr) * 1931-07-07 1932-11-02 Procédé de moulage et de fabrication des baguettes et fils en métaux et alliages tendres et matériel pour l'application du procédé
US2710433A (en) * 1948-04-30 1955-06-14 Properzi Hario Continuous metal casting machine
US3279000A (en) * 1963-12-30 1966-10-18 Southwire Co Apparatus for continuous casting of metal

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US359348A (en) * 1887-03-15 Mechanism for forming ingots
US368817A (en) * 1887-08-23 Mechanism for producing ingots
US405914A (en) * 1889-06-25 Wire-solder machine
CA528359A (fr) * 1956-07-31 B. Brennan Joseph Coulee de metaux
CH125883A (de) * 1925-03-17 1928-06-01 Julius Zueblin Vorrichtung zum Giessen von Barren, Platten etc., insbesondere von Aluminium.
US1902559A (en) * 1931-12-03 1933-03-21 Kingston Products Corp Mold
US2659949A (en) * 1951-11-08 1953-11-24 Properzi Ilario Machine for the continuous casting of metal rods
US3284859A (en) * 1963-10-14 1966-11-15 Phelps Dodge Copper Prod Circular trough casting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731536A (en) * 1968-12-07 1973-05-08 Demag Ag Apparatus for continually measuring the temperature of a continuously cast metal rod
US5404931A (en) * 1990-02-15 1995-04-11 Nippon Steel Corporation Apparatus for making strips, bars and wire rods
CN117684011A (zh) * 2024-02-02 2024-03-12 陕西天成航空材料股份有限公司 一种真空电子束冷床炉用铸锭冷却装置
CN117684011B (zh) * 2024-02-02 2024-05-14 陕西天成航空材料股份有限公司 一种真空电子束冷床炉用铸锭冷却装置

Also Published As

Publication number Publication date
BE665050A (fr) 1965-12-08
FR1434123A (fr) 1966-04-08
ES313942A1 (es) 1966-03-01
GB1107054A (en) 1968-03-20
OA01744A (fr) 1969-12-15
US3478810A (en) 1969-11-18
AT254417B (de) 1967-05-26
NL6507140A (fr) 1965-12-10
DE1483546A1 (de) 1969-09-18
CH430959A (fr) 1967-02-28

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