US3536126A - Casting machine with lightweight casting wheel - Google Patents

Casting machine with lightweight casting wheel Download PDF

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Publication number
US3536126A
US3536126A US770050A US3536126DA US3536126A US 3536126 A US3536126 A US 3536126A US 770050 A US770050 A US 770050A US 3536126D A US3536126D A US 3536126DA US 3536126 A US3536126 A US 3536126A
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Prior art keywords
casting
casting wheel
wheel
machine
casting machine
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Expired - Lifetime
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US770050A
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English (en)
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George E Lenaeus
John H Murphy
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Southwire Co LLC
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Southwire Co LLC
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels

Definitions

  • the casting machine disclosed is a casting machine having a casting wheel which is generally U" shaped in transverse cross section, which is mounted on a casting machine by being inserted into an annular channel between two mounting members that engage only the sides of the casting wheel and only with edges that are relatively narrow and that are displaced inwardly from the outer edges of the casting wheel, and which has all of its portions sufficiently thin for the thermal stress in compression induced during casting in the metal from which the casting wheel is formed not to exceed the yield point in compression ofthc metal.
  • a characteristic, of a prior art casting machine such as is shown by one of these U.S. patents is that the casting wheel is a rather massive structure which has generally been manufactured by forging and subsequent machining on a large lathe. As a result, the casting wheel in a prior art casting machine of this type causes many problems in the casting ofmolten metal.
  • the fact that the casting wheel must be manufactured by forgingand subsequent machining makes the cost of manufacturing the casting wheel relatively high and places a practical limitation on the diameter of the casting wheel even though it is known that a large diameter lessens the amount of straightening to which a cast bar is subjected as it leaves the casting wheel.
  • the weight of a casting wheel which is a rather massive structure makes the casting wheel difficult to mount upon and remove from a casting machine and generally makes it necessary to use special lifting equipment in order to accomplish the mounting or removing of the casting wheel.
  • the problem with the casting wheel of a prior art casting machine relating to the cost of manufacturing the casting wheel can be partially alleviated by machining the casting wheel after it has been removed from the casting machine so as to repair the surface of the peripheral groove.
  • the peripheral groove of the casting wheel can be repaired by machining only a limited number of times before the structural integrity of the casting wheel is lost by removal of metal or before the entire structure of the casting wheel is damaged by the heat of the molten metal.
  • each repairing ofa peripheral groove requires that the casting wheel be removed from and mounted upon the casting machine so that the problem with the casting wheel of a prior art casting machine relating to the difficulty with which the casting wheel is mounted upon and removed from the casting machine is not alleviated by repairing the peripheral groove. 7
  • the liner and support structure respond almost as a single unit with respect to the inducing of thermal stress by molten metal and as a result the liner deteriorates in use so rapidly that it must be frequently replaced on the casting machine.
  • molten metal in the liner must be cooled by colant applied to the support structure or within channels provided by the support structure, both the liner and support structure must be carefully manufactured to insure that the liner fits snugly into the recess in the support structure so as to achieve the proper application of coolant to the liner.
  • a problem with the casting wheel ofa prior art casting machine which is encountered with or without the use of a liner is that those portions of the casting wheel or support structure which define the sides and bottom of the peripheral groove often have a thickness which is determined in large part by consideration of the structure required to mount the casting wheel or the support structure rather than by consideration of the most efficient cooling of molten metal in the peripheral groove.
  • it is the usual thickness ofthcse portions of the casting wheel or the support structure of a prior art casting machine which causes the rapid deterioration of the surface of the peripheral groove that is a significant problem with the casting wheel and which contributes to the other problems considered above.
  • the invention disclosed here overcomes these and other problems associated with the casting wheel of a prior art casting machine for the casting of molten metal in a peripheral groove in the casting wheel which is closed by a band.
  • the invention provides a casting machine with a casting wheel which has a relatively low cost of manufacturing, which may be of substantially any desired diameter, which is relatively light in weight and otherwise relatively easy to mount upon and remove from a casting machine without the use of special lifting equipment, and which has those portions defining the sides and bottom of the peripheral groove of a thickness that facilitates the cooling of molten metal in the peripheral groove and that retards the deterioration of the surface of the peripheral groove.
  • a casting wheel which is generally U" shaped in transverse cross section, which is mounted on a casting machine by being inserted into the annular channel between two mounting members that engage only the sides of the casting wheel and only with edges that are relatively thin and displaced inwardly from the outer edges of the casting wheel, and which has most or all of its portions relatively thin.
  • the casting wheel in the casting machine provided by the invention is substantially a ring which is generally U" shaped in transverse cross section and which requires that no portion be of excessive thickness
  • a casting wheel having substantially any desired diameter is conveniently manufactured from a metal such as low carbon steel by forming a ring from sheet stock, a channel or the like in a conventional ring forming machine and by welding the abutting ends of the ring together.
  • the casting wheel is mounted on a casting machine by being inserted into an annular channel peripheral groove; V
  • the mounting of the casting wheel by inserting the casting- "wheelinto an annular channel between the edges of two mounting members provides a castingwheel in which those which facilitates cooling of molten metal in the peripheral groove by coolantsprayed on the casting wheel or in a channel defined by the casting wheelanda partition positioned between the mounting members inwardly of the casting wheel.
  • H6. 1 is a cross-sectional-vie w through a casting wheel I showin'ga first embodiment of the invention disclosed herein;
  • FIG. 2 is a cross-sectional view through a casting wheel showing a second'embodiment of the invention disclosed' '4-g herein; 7 I a i g 7
  • FIG. 3 is aphotomicrograph showing a prior art casting wheel at and adjacent the surface of itsperipheral groove following approximately three and one-half hours of casting; and
  • FIG; 4 isa photomic rograph showing the castingwheelof FIG. 1 at and adjacent the surface of its peripheral groove fol- I lowing approximately three and one-halfhours of casting; J l
  • -F1G. 5 is'a graph showing the thermal stressin themetal of 1 the castingwheel ofra priorart casting machine, the casting wheel being formed of 510W carbon steeland thermal stress being a function of time following'the pouring of molten copper into the peripheral groove;
  • F1656 is a graph showing the thermal stress in the metal'of the casting wheel of a prior art casting machine, the casting wheel being formed of copper and thermal stress being a func-. tion of time following the pouring of molten copper intothe 'FIG. 7 is a graph showing th'e thermalstress in the metal of the casting wheel-of alcasting machine embodying the'invention disclosed herein, the casting wheel being formed of low 7 carbon steel and thermal stress being a function of time following the pouringflof molten c'o ppe r into the I. peripheral groove.
  • the invention disclosed herein is a casting machine having a castingwheel 10 'which avoids many problems encountered in the prior art.
  • the casting machine is substantially as shown by one of the patents listed above in; describing the prior art. Accordingly, only the castin g'wheellfl and related mounting structure are shown in the drawing and described below since the use of the casting wheel 10 on a casting machine and those structural components of a casting machine not shown or described will be understood by those skilled inithe art.
  • the invention disclosedherein is a continuous ring having a casting wheel llldefinesa peripheral groove 11 by opposed walls 12 and 13 and'by a bottom 14.
  • the walls 12 and 13 and bottom 14 cooperate with abandM15' positioned againsty the casting wheel '10-in conventional nanner to form a casting moldM.
  • the walls 12 and 13 and the bottom 14 are of substantially the same thickness as the band 15.
  • 'lhecasting wheel 10 is mounted on'a casting machine by being inserted into an annular channel 16 provided by a mounting means including an inner mounting member 17 and an; outer mounting member.18:"Theinner mounting member 17' includes an inner angle member 19 which is attached by a.
  • the outer mounting member 18' includes an outer angle membcr24 which is attached by a plurality of bolts such as bolt 50 to an outer ring member .25.1
  • the outer ring member 25 ispositionedlaterally relative to thc3i nner ring member 21 by a plurality of positioning members sup as positioning member "26ywhich are.
  • the casting wheel 10 is firmly wedged into the annular channel 16 or may simply ffioat in i l the annular channel 16 Hgw everfif 'the casting wheel 10 is I wedged into the annular channel l6,"that portion 32 of the inner angle member .19 which engages the casting wheel 10 is relatively thin and engage s the wall 12 of the casting wheel 10 only in a circle that row gin width relative to the radial width of the wall 12 and that is displaced inwardly from the outer edge 33 of the wall [2.
  • portion 34 of the outer angle member 24 which engages the wall 13 of the casting wheel is relatively thin and engages the wall 13 of the casting wheel 10 in a circle that is narrow relative to the radial width of the wall 13 and that is displaced inwardly from the outer edge 35 ofthe wall 13.
  • the casting wheel 10' is also a continuous ring member having a transverse cross section generally resembling the letter
  • the casting wheel 10' is not of uniform thickness in transverse cross section and as a result, the walls 12 and 13 adjacent the bottom 14' are of greater thickness than the walls 12' and 13 at the outer edges 33 and 35'
  • the inner ring member 21' and the outer ring member are positioned relative to each other by a plurality of spacing members such as the spacing member 36 which is similar to a positioning member 26 in that embodiment of the invention shown in FIG. I except that a spacing member 36 does not include outer nuts 29 and 31.
  • the outer sufaces 37 and 38 of the walls 12' and 13' are substantially perpendicular to the bottom 14' so that the walls 12' and 13' must be welded to the angle members 19' and 24 or a plurality of brackets, such as bracket 42 shown in dashed line in FIG. 2. must be mounted on the inner ring member 2l' in order to position the casting wheel 10' in the annular channel 16'.
  • spacing members such as the spacing member 36 are used simply to maintain the lateral spacing between the ring members 21 and 25'.
  • positioning members such as a positioning member 26 can be used with the casting wheel 10" and that the casting wheel 10 shown in FlG.
  • the portions 32' and 34' ofthC angle members 19' and 24' engaging the casting wheel 10' are relatively thin and engage the casting wheel 10 in circles that are relatively narrow and that are displaced inwardly fromthe outer edges 33 and 35 ofthe walls 12' and 13'.
  • a casting wheel 10 or 10' in a casting machine embodying the invention is a continuous ring having a transverse cross section generally resembling the letter U" and which is mounted on a casting machine by being inserted in an annular channel l6 or 16' between two mounting members 17 and 18 or 17' and'l8' so that it is engaged by only relatively thin portions 32 and 34 or 32' and 34' in circles that are relatively narrow and that are displaced inwardly from the outer edges 33 and 35 or 33' and 35 of the casting wheel 10 or 10.
  • the casting wheel 10 of substantially uniform thickness in transverse cross section shown in FIG.
  • the casting wheel 10 of varying thickness in transverse cross section shown in FIG. 2 is conveniently manufactured from a conventional three inch ship building channel oflow carbon steel by using a conventional ring forming machine to form a ring and by welding the abutting ends of the ring together.
  • a casting wheel 10 or 10' has a relatively low cost of manufacturing and may be of substantially any desired diameter because of the method by which it may be manufactured. Moreover, since a casting wheel 10 or 10' is simply inserted into an annular channel 16 or 16 and since only the outer edges 33 and 35 or 33 and 35' are engaged by a band 15, a casting wheel 10 or 10 need not be a perfect circle and this reduces the cost of manufacturing regardless of method of manufacture.
  • the walls 12 and 13 and bottom 14 have a thickness of approximately .12 inches.
  • the walls 12' and 13 vary in thickness from .25 inches to .5 inches and the bottom 14' has a thickness of approximately .25 inches.
  • a casting wheel 10 or I0 is relatively light in weight compared to the casting wheels of prior art casting machines which have rather massive structures. Moreover, it will be understood that because of this relatively light weight and because the casting wheel 10 or 10' is mounted on casting machine simply by being inserted into a channel 16 or 16, a casting wheel 10 or 10' is relatively easy to mount upon and remove from a casting machine.
  • a casting wheel 10 or 10' can be inserted into or removed from a channel l6 or 16' with the angle members l9 and 24 or 19' and 24' being mounted on the casting machine or with the angle members l9 and 24 or 19' and 24 being welded to the casting wheel 10 or 10' so that they are mounted on and removed front the casting machine with the casting wheel 10 or 10.
  • the casting wheel N) or 10' is still relatively light and can be mounted upon and removed from a casting machine without the use of special lifting equipment.
  • the walls 12 and I3 and the bottom 14 may be of substantially the same thickness and material as the band l5 so that cooling around the transverse cross section of molten metal in the peripheral groove ll is substantially uniform.
  • the walls 12 and 13' vary in thickness so that cooling is related to the mass of molten metal in the peripheral groove ll adjacent each portion ofa wall [2' and [3.
  • the walls 12 and [3 or l2 and 13' and bottom 14 or 14' may be substantially of any desired thickness to provide for a desired transfer of heat from molten metal in the peripheral groove ll or H to coolant.
  • coolant may be sprayed on the casting wheel 10 or 10' as in the casting machine shown in U.S. Pat. No. 3,279,000 referenced above or may be in a channel 40 such as one formed by a partition 41 between ring members 21' or 25' and which is similar to the channels used in the casting machine shown in U.S. Pat. No. 3,318,369 referenced above.
  • relatively thin walls 12 and 13 or 12' and 13 and bottom 14 or 14' in a casting wheel 10 or 10' of a casting machine embodying the invention disclosed herein serve to provide a casting wheel 10 or 10' having a useful life which is longer than that of casting wheels used in prior art casting machines. This is because the relatively thin walls 12 and 1 3 or 12 and I3 and bottom 14 or 14' retard the deterioration of the surfaces of the walls 12 and 13 or 12' and 13 and the bottom 14 or 14 defining the peripheral groove ll or 11' as is shown by a comparison of HG. 3 with FIG. 4.
  • F IG. 3 is a photomicrograph of a casting wheel in a prior art casting machine such as that shown in U.S. Pat. No. 3,318,369 showing the surface 43 of the bottom 44 that defines in part the peripheral groove 45 of the casting wheel. The surface 43 is shown as it appears after approximately three and one-half hours of use.
  • FIG. 4 is a photomicrograph of the surface 47 of V manner indicated in FIG. 4.
  • the bottom l4 that with the walls 12 and I3 defines the t peripheral groove of a casting wheel 10.
  • the surface also shown as it appearsafter approximatelythree and onehalf hours of use.
  • the ca'sting wheel shown in FIG. B and the castingvvheel 10 shown in FIG. 4 were both formed of low carbon steel and the bottom 44 was approximately .5 inches thick. while the bottom l4 was-only approximatelyl2 inches thick v of the wallslZ and I3 or I2 and IS' and of the 14 or 14' is less than thatc'ritical thickness at whichth J stress induced by molten metal in a peripheral groolie II or 11' exceedsthe yield 'point in compressionofthe -nietal from which 'thereasting wheel'ltl or 10' is formed.
  • the bottom l4 was-only approximatelyl2 inches thick v of the wallslZ and I3 or I2 and IS' and of the 14 or 14' is less than thatc'ritical thickness at whichth J stress induced by molten metal in
  • FIG. 5 is a graph "showing in pounds per square inch the thermal stress incompression at a surface such as the surface 43 of the bottom 44 of the casting wheel of a prior art'casting machine shown in FIG. 3.
  • the casting wheel was formed of low carbon steel and the thermal stress shown in FIG. 5 is a function of time in seconds following the pouring of molten copper into" a peripheral groove such as the peripheral groove 45 shown in FIG.3.
  • '-' I no. 6 is similar to FIG. 5 except that it is for the casting wheel of a prior art casting machineinwhich the casting wheel is formed of copper rather than of low carbon steel, However,
  • I shows thermal stress andthat certain portions of the wall I2 and 13' mayunder some loperatingcon ditions be relatively thick such as in the casting machineuIO' without excessive deterioration of theperipheral groovel If occurring.
  • FIG. 7 is for a casting wheel 10 formed oflow carbon steel and used' in an embodiment of the invention disclosed herein in that the walls 12 and 13 and the bottom I4 are sufficiently thin to-retard deterioration such as that shown by FIG. 3' in the AlthoughFlG. 7shows in pounds per squarcinch thermal stress in compression at a surface such as thcsurfaceflof the bottom 14 in FIG.
  • FIG.f7' is'reprcsentative of any casting wheel 10 or 10' in an embodimentof the invention disclosed herein.
  • FIG.f7' is'reprcsentative of any casting wheel 10 or 10' in an embodimentof the invention disclosed herein.
  • thermal stress reaches a maximum value. From FIG. 5 it is 1 the walls 12 and I3 or I2 and I3. and the bottom 14 or 14' seen that when the bottom 44. is of low carbon steel and has a sion is substantially'less than 30,000 pounds per square inch.
  • the yield point in compression for low carbon steel can be considered to be approximately 30,000 pounds per squareinch underccrtain operating conditions of a casting wheel-Thus, inthe casting.
  • walls 12 and I3 or I2' and I3 and a bottom I4 or I4 will provide an embodiment of the invention disclosed herein if the walls I2 and I3 or 12' and I3" and the bottom I4 or 14' are approximately .30 inches in thickness rather than .50 inches in thickncss as in the casting wheel formed of copper represented by FIG-6. This is because are suflicicntly thin to retard the deterioration. by thermal stress of those surfaces defining a peripheral groove II or I I.
  • the yielded metal does not return to the zero embodiment of the invention disclosed hereimthe thickness face of said peripheral groove and on another side defines an external surface for the application of a coolant, said portion having a thickness between said one side and said another side which is less than that thickness at whichthe thermal stress in compression induced in said solid metal byheat from a molten metal in said peripheral groove equals the yield point in comis copper.
  • the casting machine of claim 4 including a mounting means for forming an annular channel into which said casting wheel is placed for rotation.
  • said mounting means includes a first mounting member and a second mounting member and in which said annular channel is defined between an edge of said first mounting member and an edge of said second mounting member.
  • the casting machine of claim 6 including a partition extending between said first mounting member and said second mounting member inwardly of said casting wheel and positioned to define a coolant channel with said casting wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
US770050A 1968-10-23 1968-10-23 Casting machine with lightweight casting wheel Expired - Lifetime US3536126A (en)

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US77005068A 1968-10-23 1968-10-23

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US3536126A true US3536126A (en) 1970-10-27

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US770050A Expired - Lifetime US3536126A (en) 1968-10-23 1968-10-23 Casting machine with lightweight casting wheel

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US (1) US3536126A (enrdf_load_stackoverflow)
JP (1) JPS4823250B1 (enrdf_load_stackoverflow)
BE (1) BE740715A (enrdf_load_stackoverflow)
DE (2) DE6940858U (enrdf_load_stackoverflow)
ES (1) ES372817A1 (enrdf_load_stackoverflow)
FR (1) FR2024100B1 (enrdf_load_stackoverflow)
GB (1) GB1273590A (enrdf_load_stackoverflow)
YU (1) YU33648B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667537A (en) * 1968-12-30 1972-06-06 Spidem Ste Nle Cooling device for a continuous-casting wheel
US3682234A (en) * 1970-09-17 1972-08-08 Essex International Inc Structure for the continuous casting of metal bars
US3785428A (en) * 1972-03-02 1974-01-15 Hazelett Strip Casting Corp Wheel-belt continuous casting machine
US3818972A (en) * 1972-10-05 1974-06-25 Southwire Co Cast bar draft angle
US4033405A (en) * 1974-12-02 1977-07-05 Giulio Properzi Casting wheel for a continuous casting machine of the wheel and belt type
US5293927A (en) * 1990-02-15 1994-03-15 Nippon Steel Corporation Method and apparatus for making strips, bars and wire rods
US20150068700A1 (en) * 2012-04-13 2015-03-12 Kme Germany Gmbh & Co. Kg Casting Wheel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279000A (en) * 1963-12-30 1966-10-18 Southwire Co Apparatus for continuous casting of metal
US3311955A (en) * 1965-01-06 1967-04-04 Southwire Co Disposable mold member for casting machine
FR1468070A (fr) * 1965-02-12 1967-02-03 Southwire Co Dispositif de refroidissement d'une roue de coulée pour la coulée continue d'un métal
FR1476009A (fr) * 1965-03-20 1967-04-07 Dispositif de refroidissement monté dans une roue de coulée faisant partie d'une installation pour la production de barres métalliques

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667537A (en) * 1968-12-30 1972-06-06 Spidem Ste Nle Cooling device for a continuous-casting wheel
US3682234A (en) * 1970-09-17 1972-08-08 Essex International Inc Structure for the continuous casting of metal bars
US3785428A (en) * 1972-03-02 1974-01-15 Hazelett Strip Casting Corp Wheel-belt continuous casting machine
US3818972A (en) * 1972-10-05 1974-06-25 Southwire Co Cast bar draft angle
US4033405A (en) * 1974-12-02 1977-07-05 Giulio Properzi Casting wheel for a continuous casting machine of the wheel and belt type
US5293927A (en) * 1990-02-15 1994-03-15 Nippon Steel Corporation Method and apparatus for making strips, bars and wire rods
US5404931A (en) * 1990-02-15 1995-04-11 Nippon Steel Corporation Apparatus for making strips, bars and wire rods
US20150068700A1 (en) * 2012-04-13 2015-03-12 Kme Germany Gmbh & Co. Kg Casting Wheel

Also Published As

Publication number Publication date
JPS4823250B1 (enrdf_load_stackoverflow) 1973-07-12
DE6940858U (de) 1970-07-09
FR2024100A1 (enrdf_load_stackoverflow) 1970-08-28
DE1966414C3 (enrdf_load_stackoverflow) 1974-09-19
YU33648B (en) 1977-12-31
ES372817A1 (es) 1971-11-01
FR2024100B1 (enrdf_load_stackoverflow) 1973-10-19
GB1273590A (en) 1972-05-10
DE1952884A1 (de) 1971-02-04
DE1966414B2 (de) 1974-02-21
BE740715A (enrdf_load_stackoverflow) 1970-04-01
YU246369A (en) 1977-06-30
DE1966414A1 (de) 1972-08-17

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