US2940143A - Method for the centrifugal continous casting of metals - Google Patents

Method for the centrifugal continous casting of metals Download PDF

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Publication number
US2940143A
US2940143A US693380A US69338057A US2940143A US 2940143 A US2940143 A US 2940143A US 693380 A US693380 A US 693380A US 69338057 A US69338057 A US 69338057A US 2940143 A US2940143 A US 2940143A
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United States
Prior art keywords
steel
metal
ring
mould
centrifugal
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Expired - Lifetime
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US693380A
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English (en)
Inventor
Daubersy Jean
Schlemmer Albert
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Individual
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Individual
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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
    • B22D11/14—Plants for continuous casting
    • B22D11/144—Plants for continuous casting with a rotating mould
    • 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
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes

Definitions

  • the invention consists in interposing a liquid ring formed by a melted metal heavier than steel between the exterior mould and the centrifuged circular piece.
  • This ring functions as a lubricant to reduce considerably the friction between the exterior mould and the centrifuged circular piece by reduction of the contact between the centrifuged circular piece and the solid wall of the mould.
  • the metal to be used in order to form the liquid ring is selected not only by its density, but also by its melting and ebullition temperature.
  • the metal of the ring must melt at a temperatu're inferior to the melting point of the steel, in order that this metal may remain liquid at the temperature existing in the ring and resulting from the contact with the cooled'mould on the one hand and with the solidifying steel on the other hand.
  • the metal does not begin to boil, that is to say that itsebullition point at'the pressure generated by the centrifuging must be superior to the melting point of the steel or at least to the highest temperature which may exist at its contact with the solidified wall of the steel.
  • the metals used must not contaminate the steel. These conditions may be realized only by a small number of metals.
  • the liquid ring is a simple means to avoid the danger of fissuring of the caststeel, said danger being due to the shrinkage resulting from the solidification and from the cooling.
  • Figure l is a sectional view of a mold structure adapted for practicing the method of the invention.
  • Figures 2, 3 and 4 are sectional views similar to Figure 1, illustrating modified forms of the apparatus exemplified in Figure 1.
  • Figure 1 of the drawings shows in section a device for the centrifugal continuous casting between two concentric moulds.
  • 1 represents the interior mould
  • 2 the exterior mould
  • 3 a supply chamber
  • 4 the solidified centrifuged annular piece
  • 5 the liquid ring.
  • the back-pressure may be made more effective by creating a circulation of the metal of the ring and by controlling by means of bafiles the rate of discharge of the metal in the ring. So, a dynamic pressure, bound to the flow of heavy metal in circulation is added in the ring to the static pressure resulting from the centrifuging, so that the resulting pressure in the mould increases progressively during the shrhflrage.
  • the simplest method consists, according to the invention, in pouring into the supply chamber of the mould together with the steel, small quantities of heavy metal in liquid or even solid condition.
  • Such a system may be compared with a simple lubrication of the mould by afirmof heavy liquid metal. But in addition'to the lubrication properly so called, this heavier metal encircles and exerts a confining on the exterior diameter of the annualpiece, an increasing of the rate of supplying of heavy metal necessarily producing a certain reduction of this diameter.
  • This simple system however presents some disadvantages due to the fact that the heavy metal must pass through the melting steel.
  • FIG. 2 A relatively improved form of the invention is illustrated in Fig. 2 where parts identical to those of the preceding embodiment are designated by similar reference characters.
  • the exterior mould is shaped in the form of a cup which is supplied with heavy metal 6 through one or several chan nels exterior to the steel 3 through a circular supplying chute 7 rotating with the mould which is cooled by not represented devicese.
  • a leakage flow forming a lubricating film escapes between the solidified annular piece and inner periphery of a sleeve on cup 8. This edge will be more or less wide and tapered to the profile naturally formed by the centrifuged annular piece during its shrinkage.
  • the rate of supply of heavy metal must counter- I balance the leakage flow to allow obtaining the desired exterior diameter of the centrifuged circular piece. Any variation of the supplying rate of flow gives rise to. a variation of the pressure in the ring and consequently a variation of the diameter of the annular piece. These variations are automatically balanced by a variation of the leakage-flow, which will normally increase or decrease with the pressure variations in the. ring.
  • n is een that me; adj asgsrome internal diameter ofLtheQliquid ring may be, accomplished by a leakage flow which must be recovered. 1 Recovery may bejaccomplished by following device, as shown-Vin ' Figure 85. steel, including ,lead, bismuth, silver and alloysof these elements, and circulating said molten. metal into and 7 out at the extremity of a gutter 9 situated at the mould end. a r
  • This sheet is collected by a fixed circular chute 10, the shape of said chute being conceived to'receive the metal jet and at the same time to avoid the throwing out of the metal and to absorb its inertia.
  • the chute has for example a spiral shape.
  • the metal isv collected below the chute, for return to the mold by'suit able means, not shown;
  • the chute 10 may have, if needed, a circular movement, by fixing it on themould.
  • the chute retains the collected metal under the influence of the centrifugal force. A relatively low pressure 'will then. be sulfi'cient to bring backthe heavy metal to .thesupplying channel of the mold.
  • the metal constituting the liquid ring is not systematically changed and the leakage fiow' is the one which is exactly necessary for the regulation above mentioned.
  • p p 7 f t The steel'is' cooling down by conduction asin the case of esblid'mould. To go'from steel-to the solid mould, theheat must simply cross. through the intermediary sheet of-heavy metal. The conductivity of the selected metal and the thickness of'the liquid sheet are then important factors for the cooling. . The design of the external mould must also be carefully executed and cooling fiangesiin amaterial with good conductivity of the heatwill. be eventuallyused as shown at 11 in Figure 2.
  • the metal constituting theliquid ring is'rapidly changedand then the'steel is cooled down both by conductivity, as inthe first mode, and by the heating of the heavy metal in circulation.
  • g r i To obtain the desired eifect, it is necessary to have sufficiently high'flowspsince the specific heat .of the used metals generally is. low.
  • the liquid ring will be supplied by a'complete device of circulation, the temperature and the flow of which are regulated.
  • This device may obviously be provided with accumulators, regenerators and all other apparatus generally used to assure the previous purposes.
  • thecooling device may be made as a heat recovering device in order to recover energy in every interesting form.
  • a method for the centrifugal continuous casting of steel in a mold which consists in jinterposing a ring of molten metal heavier than steel. between thelsteel and the wall of the mold, wherein the said ring of molten-metal is formedby adding small quantities of molten metal to the liquid steel poured into'the mold, said molten metal being chosen from the group: which does not alloy with through themold whereby same is dischargedfrom the mold, including the step of regulating the diameter of the centrifuged casting ,of steel by" varying the rate of addition of molten metal to the-steel.
  • a method as claimed in claim 4 including the step of accelerating the cooling of the steel by a rapid circulation of the said metal of the annular ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US693380A 1956-11-09 1957-10-30 Method for the centrifugal continous casting of metals Expired - Lifetime US2940143A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE827262X 1956-11-09

Publications (1)

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US2940143A true US2940143A (en) 1960-06-14

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US693380A Expired - Lifetime US2940143A (en) 1956-11-09 1957-10-30 Method for the centrifugal continous casting of metals

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US (1) US2940143A (en(2012))
BE (1) BE552459A (en(2012))
FR (1) FR1186471A (en(2012))
GB (1) GB827262A (en(2012))
LU (1) LU35508A1 (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153821A (en) * 1961-10-16 1964-10-27 Anaconda Wire & Cable Co Continuous casting apparatus for casting corrugated cylinders
US3358359A (en) * 1964-03-13 1967-12-19 Rheinstahl Huettenwerke Ag Method of making a socket mold
US3445922A (en) * 1966-02-11 1969-05-27 George R Leghorn Method and apparatus for the forming of longitudinal structural shapes from cast tube
US3455369A (en) * 1966-09-16 1969-07-15 Aluminum Co Of America Horizontal continuous casting
US3616842A (en) * 1968-10-21 1971-11-02 George R Leghorn Continuous centrifugal casting of tube using liquid mold
US3625276A (en) * 1969-02-10 1971-12-07 Apv Co Ltd Centrifugal casting of tubes including slag separation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018161156A1 (en) * 2017-03-10 2018-09-13 8617490 Canada Inc. Tubular shape casting apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189622708A (en) * 1896-10-13 1896-11-14 William Henry Beck New or Improved Apparatus for Indicating the Times of the Tides.
US1831310A (en) * 1927-03-30 1931-11-10 Lewis B Lindemuth Centrifugal casting
US1864270A (en) * 1930-05-07 1932-06-21 Youngstown Sheet Method of continuous centrifugal casting
US2473221A (en) * 1947-03-06 1949-06-14 Rossi Irving Method and apparatus for the continuous casting of metal tubes
US2754559A (en) * 1955-02-11 1956-07-17 Howard A Fromson Method for the casting of sheets of a fusible material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189622708A (en) * 1896-10-13 1896-11-14 William Henry Beck New or Improved Apparatus for Indicating the Times of the Tides.
US1831310A (en) * 1927-03-30 1931-11-10 Lewis B Lindemuth Centrifugal casting
US1864270A (en) * 1930-05-07 1932-06-21 Youngstown Sheet Method of continuous centrifugal casting
US2473221A (en) * 1947-03-06 1949-06-14 Rossi Irving Method and apparatus for the continuous casting of metal tubes
US2754559A (en) * 1955-02-11 1956-07-17 Howard A Fromson Method for the casting of sheets of a fusible material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153821A (en) * 1961-10-16 1964-10-27 Anaconda Wire & Cable Co Continuous casting apparatus for casting corrugated cylinders
US3358359A (en) * 1964-03-13 1967-12-19 Rheinstahl Huettenwerke Ag Method of making a socket mold
US3445922A (en) * 1966-02-11 1969-05-27 George R Leghorn Method and apparatus for the forming of longitudinal structural shapes from cast tube
US3455369A (en) * 1966-09-16 1969-07-15 Aluminum Co Of America Horizontal continuous casting
US3616842A (en) * 1968-10-21 1971-11-02 George R Leghorn Continuous centrifugal casting of tube using liquid mold
US3625276A (en) * 1969-02-10 1971-12-07 Apv Co Ltd Centrifugal casting of tubes including slag separation

Also Published As

Publication number Publication date
GB827262A (en) 1960-02-03
LU35508A1 (en(2012))
BE552459A (en(2012))
FR1186471A (fr) 1959-08-25

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