US3353587A - Apparatus for effecting the continuous rotary casting of hollow steel blanks - Google Patents

Apparatus for effecting the continuous rotary casting of hollow steel blanks Download PDF

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Publication number
US3353587A
US3353587A US355027A US35502764A US3353587A US 3353587 A US3353587 A US 3353587A US 355027 A US355027 A US 355027A US 35502764 A US35502764 A US 35502764A US 3353587 A US3353587 A US 3353587A
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US
United States
Prior art keywords
mandrel
blank
continuous rotary
taper
effecting
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US355027A
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English (en)
Inventor
Babel Louis
Peytavin Pierre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CIVILE DITE SOCIETE CIVILE D'ETUDES DE CENTRIFUGATION Ste
ILE SOC CIV D ETUDES DE CENTRI
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ILE SOC CIV D ETUDES DE CENTRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by ILE SOC CIV D ETUDES DE CENTRI filed Critical ILE SOC CIV D ETUDES DE CENTRI
Priority to US610707A priority Critical patent/US3416591A/en
Application granted granted Critical
Publication of US3353587A publication Critical patent/US3353587A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • 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
    • 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

Definitions

  • the problem of the formation of the internal wall of the blank involves great difiiculties because, on the one hand, of the necessity of cooling the metal suificiently to obtain its solidification and, on the other hand, of the shrinkage resulting from the lowering of temperature.
  • the present invention relates to a new process for effecting the continuous rotary casting of hollow blanks, for example of steel, with the aid of an internal mandrel, said process being characterised in that the cooling of the blank caused by the central mandrel is reduced by providing, on the periphery of the latter and at least at certain points, means slowing down the heat exchange between the blank and the mandrel.
  • the present invention likewise relates to a new device for the continuous rotary casting of hollow blanks enabling the process defined above to be carried out, saiddevice being characterised essentially in that it comprises a cooled mandrel, the active surface of which is in the form of at least two truncated cones, the apertures of which decrease towards the lower ends of the mandrel.
  • the formation of a solidified skin is obtained by contact between the liquid and the upper truncated cone. Then, since the taper of this portion of the mandrel is greater than the taper assumed by the skin thus formed, bearing in mind the speed of extraction and of contraction, the skin moves away from the mandrel and thus causes the formation of a cushion of gas which considerably reduces the heat exchange and enables the skin to become considerably thicker without the internal wall becoming too brittle following severe cooling.
  • the skin then comes into contact with the second truncated cone of the mandrel which ensures additional cooling, then the same phenomenon recurs and the skin again moves away from the mandrel which again reduces the heat exchange because of the cushion of gas situated between the blank and the mandrel.
  • the mandrel according to the invention does in fact permit the solidification of the internal wall of the blank While limiting the heat exchange between the blank and the mandrel in such a manner that the internal wall is formed under such conditions that internal cracks are avoided.
  • the single figure of this drawing illustrates diagrammatically the mandrel 1 according to the invention which is cooled internally and is held in any manner.
  • the mould 2 which is also cooled and which can be driven in rotation by any means, is likewise illustrated.
  • the base of the mandrel 1 consists of three truncated cones 1a, 1b and 1c, the taper of which decreases.
  • the shape of the blank is also illustrated in section in the drawing, the solidified portions being cross-hatched while the portions which are still molten are represented by broken horizontal lines.
  • the mandrel 1 may, for example be made with relatively thin copper walls, its interior being copiously irrigated with cold water.
  • the first contact between the molten metal and the portion 1a of the mandrel is of short duration because, bearing in mind the speed of extraction of the blank and the contraction thereof, the taper assumed by the internal wall of the blank is less than the taper of the portion 1a of the mandrel so that a separation 3 occurs between the blank and the mandrel. Then the portion of the blank in question comes level with the portion 1b of the mandrel which has less taper so that a fresh contact occurs between the blank and the portion 1b, which contact affords both the support of the internal wall of the blank and additional cooling.
  • such a device renders it possible to reduce considerably the cooling of the internal wall of the blank, which enables said wall, which is extremely fragile at the moment when it is formed, to thicken considerably before its internal wall has been subjected to a major reduction in temperature which would render it brittle.
  • the device according to the invention has a double advantage; on the one hand the heat exchange is reduced between the blank and the mandrel which, other things being equal, enables a thicker skin to be obtained having a more homogeneous temperature; moreover, the fact that free spaces are left between the mandrel and the blank which is forming, which spaces ensure the thermal insulation, permits a free contraction of the blank at these points and enables the internal skin of the blank, which is still plastic, to shrink together under the hydrostatic pressure of the molten metal and so to fill in again any cracks which may have formed.
  • the rotary casting of hollow steel blanks having an external diameter of 190 mm. and a thickness of 35 mm. was obtained under very satisfactory conditions with a speed of extraction of 1 metre per minute.
  • a mandrel was used comprising three truncated cones at its lower portion, the first of these, situated at the top, having a height of 40 mm. and a total taper of 4%, the second having a height of 100 mm. and a total taper of 1.5% and the third having a height of 300 mm. and a total taper of 0.8%.
  • the mandrel which has been described can be used in various devices which are used to effect the continuous casting of steel.
  • such a mandrel may be used to advantage in an apparatus in Which the mandrel turns at a speed substantially equal to the speed of the mould about an axis which is slightly eccentric in relation to the axis of the mould, the jet of molten metal feeding the blank being projected at a suitable point upstream of the point of the mandrel which is closest to the mould.
  • An apparatus for the continuous rotary casting of hollow metal blanks wherein molten metal is cast between a rotating mold and a central mandrel having a temperature lower than that of said molten metal, said mandrel being in the form of at least two superimposed truncated cones, each of said cones diminishing in taper in the direction toward the lower end of said mandrel.
  • said mandrel is in the form of at least three superimposed truncated cones, the upper one of which has a height of approximately mm. and a total taper of approximately 4%, the middle one of which has a height of approximately mm. and a total taper of approximately 1.5%, and the lower one of which has a height of approximately 300 mm. and a total taper of approximately 0.8%.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Mold Materials And Core Materials (AREA)
US355027A 1963-03-27 1964-03-26 Apparatus for effecting the continuous rotary casting of hollow steel blanks Expired - Lifetime US3353587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US610707A US3416591A (en) 1963-03-27 1966-11-29 Process for effecting the continuous rotary casting of hollow steel blanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR929486A FR1421244A (fr) 1963-03-27 1963-03-27 Nouveau procédé pour réaliser la coulée continue rotative d'ébauches creuses enacier

Publications (1)

Publication Number Publication Date
US3353587A true US3353587A (en) 1967-11-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
US355027A Expired - Lifetime US3353587A (en) 1963-03-27 1964-03-26 Apparatus for effecting the continuous rotary casting of hollow steel blanks

Country Status (10)

Country Link
US (1) US3353587A (no)
AT (1) AT258498B (no)
BE (1) BE645870A (no)
CH (1) CH420496A (no)
DE (1) DE1458193B2 (no)
ES (1) ES298062A1 (no)
FR (1) FR1421244A (no)
LU (1) LU45759A1 (no)
NL (2) NL6403321A (no)
SE (1) SE317160B (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486550A (en) * 1965-07-01 1969-12-30 Phelps Dodge Copper Prod Continuous casting of tubes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409068A (en) * 1965-07-01 1968-11-05 Phelps Dodge Copper Prod Method of continuously casting tubes using a rotating mandrel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR897493A (fr) * 1942-09-24 1945-03-22 Wieland Werke Ag Noyau pour la coulée continue de tubes ou de barres creuses métalliques
CA522526A (en) * 1956-03-13 Junghans Siegfried Cylindrical thorn
DE960126C (de) * 1951-05-08 1957-03-14 Eisenwerke Gelsenkirchen Ag Verfahren zum Stranggiessen von beliebig langen Hohlkoerpern, insbesondere Rohren
DE1099700B (de) * 1953-12-03 1961-02-16 Ver Deutsche Metallwerke Ag Kuehleinrichtung unter Verwendung eines an seinem Ende geschlossenen Dornes und eines Kuehlmittelzuflussrohres innerhalb des Dornes zum Giessen von Hohlbloecken, insbesondere Rohren, in kontinuierlichen Giessverfahren
AT216304B (de) * 1958-04-28 1961-07-25 Th Calow & Co Maschinenfabrik Verfahren zur Herstellung von strangförmigem Gut, insbesondere nahtlosen Rohren, und Einrichtung zur Ausübung des Verfahrens
GB874200A (en) * 1958-11-27 1961-08-02 Electro Chimie Metal Metal casting
DE1136797B (de) * 1960-12-31 1962-09-20 Schloemann Ag Exzentrisch in der Kokille rotierender Dorn zum Stranggiessen von Hohlkoerpern, insbesondere Rohren aus Metallen, beispielsweise Stahl

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA522526A (en) * 1956-03-13 Junghans Siegfried Cylindrical thorn
FR897493A (fr) * 1942-09-24 1945-03-22 Wieland Werke Ag Noyau pour la coulée continue de tubes ou de barres creuses métalliques
DE960126C (de) * 1951-05-08 1957-03-14 Eisenwerke Gelsenkirchen Ag Verfahren zum Stranggiessen von beliebig langen Hohlkoerpern, insbesondere Rohren
DE1099700B (de) * 1953-12-03 1961-02-16 Ver Deutsche Metallwerke Ag Kuehleinrichtung unter Verwendung eines an seinem Ende geschlossenen Dornes und eines Kuehlmittelzuflussrohres innerhalb des Dornes zum Giessen von Hohlbloecken, insbesondere Rohren, in kontinuierlichen Giessverfahren
AT216304B (de) * 1958-04-28 1961-07-25 Th Calow & Co Maschinenfabrik Verfahren zur Herstellung von strangförmigem Gut, insbesondere nahtlosen Rohren, und Einrichtung zur Ausübung des Verfahrens
GB874200A (en) * 1958-11-27 1961-08-02 Electro Chimie Metal Metal casting
DE1136797B (de) * 1960-12-31 1962-09-20 Schloemann Ag Exzentrisch in der Kokille rotierender Dorn zum Stranggiessen von Hohlkoerpern, insbesondere Rohren aus Metallen, beispielsweise Stahl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486550A (en) * 1965-07-01 1969-12-30 Phelps Dodge Copper Prod Continuous casting of tubes

Also Published As

Publication number Publication date
NL129975C (no)
FR1421244A (fr) 1965-12-17
DE1458193A1 (de) 1968-12-19
SE317160B (no) 1969-11-10
DE1458193B2 (de) 1973-01-04
LU45759A1 (no) 1964-05-27
CH420496A (fr) 1966-09-15
AT258498B (de) 1967-11-27
NL6403321A (no) 1964-09-28
ES298062A1 (es) 1964-10-16
BE645870A (no) 1964-07-16

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