US3268959A - Method and apparatus for vertical casting of hollow metalic bodies - Google Patents

Method and apparatus for vertical casting of hollow metalic bodies Download PDF

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Publication number
US3268959A
US3268959A US273098A US27309863A US3268959A US 3268959 A US3268959 A US 3268959A US 273098 A US273098 A US 273098A US 27309863 A US27309863 A US 27309863A US 3268959 A US3268959 A US 3268959A
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US
United States
Prior art keywords
mandrel
mould
axis
casting
hollow
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Expired - Lifetime
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US273098A
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English (en)
Inventor
Babel Louis
Peytavin Pierre
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CIVILE DITE SOCIETE CIVILLE D'ETUDES DE CENTRIFUGATION Ste
ILE SOC CIVILLE D ETUDES DE CE
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ILE SOC CIVILLE D ETUDES DE CE
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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
    • 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
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • B22D13/026—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being vertical

Definitions

  • Apparatus have also been provided which comprise a rotating internal mandrel which may be given a to and fro motion, this mandrel effecting the formation of the inner part of the casting during manufacture.
  • the present invention is concerned with a method and an apparatus belonging to the latter type.
  • the method according to the invention makes it possible to obviate the disadvantages which have been encountered hitherto and which have been due mainly either to the locking of the mandrel in the casting or to irregularities in the formation of the inner part of the casting.
  • the present invention relates to a novel method for effecting the vertical continuous casting of metalic hollow bodies, this method being essentially characterized in that the workpiece is cast in a rotating mould within which is situated a rotating mandrel having a downwardly directed conicity, the axis of this mandrel being slightly eccentric with respect to the axis of the rotating mould, the jet of liquid met-a1 falling on to the casting at a point offset by to 120 approximately upstream (relatively to the direction of rotation of the mandrel and of the casting) of the point of the mould nearest the mandrel
  • the mould is advantageously cooled by a similar circulation.
  • the rotating mandrel is supported by two bearings carried by two eccentric sleeves mounted in one another and adapted to be displaced independently of one another in such a manner as to vary both the value of the eccentricity of the axis of the mandrel relatively to the mould axis, and the direction of this eccentricity.
  • FIGURE 1 is a diagrammatic plan View illustrating the basic idea of the method according to the invention.
  • FIGURE 2 is a diagrammatic vertical sectional view of an apparatus for carrying the method into effect
  • FIGURE 3 is a sectional view taken along the line III-4H of FIGURE 2.
  • FIGURE 1 which represents diagrammatically a horizontal sectional view of the apparatus in a plane situated slightly above the spout through which the liquid metal is fed
  • reference numeral 1 designates the mould which is driven rotationally in the direction of the arrow F about its axis
  • 2 is the mandrel which according to the invention is also driven in rotational movement in the direction of the arrow F about its own axis 0'
  • O-O' has 3,2683% Patented August 30, l fid been shown in this drawing but, as will be seen hereinafter, this eccentricity is in practice much less than what is represented in the drawing.
  • I designates the point of impact of the jet of liquid metal on the casting 3 and the drawing clearly shows the angle as which, according to the invention, should have a value of between 30 and It will be already appreciated, by means of the diagrammatic View shown in FIGURE 1, that the upper portion of the casting is solidified in a Zone adjacent the points A, A, and then is released by the mandrel until it receives a fresh charge of metal when passing below the point I.
  • the method according to the invention owing to the eccentricity of the mandrel relatively to the mould, eliminates substantially all risk of jamming the mandrel in the casting and nevertheless ensures very satisfactory formation of the inner portion of the casting owing to the fact that over a considerable path of travel about the points A, A, the casting, still in the liquid or pasty state, is held supported between two walls which are substantially parallel and are moving in the same direction.
  • reference numeral 11 again indicates the mould which is driven in rotational movement about its axis 0 and the structure of which is such that it can be cooled by means of a fluid entering through the duct 4 and projected onto the mould through appropriate orifices.
  • FIGURE 2 also shows the mandrel 2 rotating about its axis 0, the lower portion 5 of the said mandrel according to the invention having a slight downwardly directed conicity.
  • the inner mandrel 2 is cooled by the introduction of water circulating at a considerable speed, which enters through the tube 6 and leaves at 7, as indicated by the arrows in the figure.
  • the mandrel 2 is supported by two upper and lower radial bearings 8 and 8.
  • the outer portion of the bearing 8 (FIGURE 2) is supported by a sleeve 9 capable of being rotated within a sleeve It) by means of peripheral teeth 11 driven by a worm 12.
  • the sleeve ltl is itself adapted to be rotated within the frame 13 of the apparatus by means of peripheral teeth 14 driven by a worm 15.
  • the eccentricity of the mandrel 2 relatively to the sleeve 9 being equal to the eccentricity of the sleeve 9 relatively to the sleeve 10, it will be appreciated that, by acting on the worm 12, it is possible to vary the eccentricity of the mandrel 2 relatively to the sleeve 16) between zero and a maximum value.
  • the sleeve It is capable of being displaced in rotational movement on an axis identical with the axis of rotation of the mould 1, it will also be appreciated that it is possible to vary the angular orientation of the eccentricity of the mandrel 2 relatively to the mould 1 by acting on the hand wheel 16 connected to the worm 15.
  • the apparatus according to the invention permits of great flexibility in the regulation of the position of the mandrel relatively to the mould.
  • FIGURE 2 shows, the mandrel is rotated by means of the motor 17 fixed to a cage 18 which is itself mounted on the upper portion of the mandrel 2 by means of radial bearings 19, and rotational movement of which is prevented by any desired means.
  • the total conicity of the mandrel is understood to be the ratio between the variation of the diameter measured between two given points on the axis of the mandrel, and the distance of these two points from the axis of the mandrel.
  • a displacement of 1000 millimeters along the length of the mandrel corresponds to a variation of diameter of the mandrel of 8 mm.
  • a displacement of 100 millimeters along the length of the mandrel corresponds to a variation of diameter of the same of 0.8 mm.
  • the value of the eccentricity represented by the distance O-O in FIGURE 1 is generally between 0.4 and 2.5 mm.
  • the speed of extraction of the casting varies between 50 cm. and 2 metres per minute, whereas the rotational speed of the mould is generally between 60 and 200 rpm.
  • the angle or formed by the jet impact point I relatively to the point A on the mould, at which the mandrel is nearest to it is generally, according to the invention, between 30 and 120 and preferably in the vicinity of 90.
  • a casting of semi-hard steel is continuously cast with an external diameter of 190 mm. and an internal diameter of 120 mm., with an extraction speed of 1 metre per minute, regulating the apparatus in such a manner that the on angle is about 90, the eccentricity OO' being 0.4 mm., the rotational speed of the mandrel 150 revolutions per minute, and the total conicity of the mandrel 8%
  • the embodiment of the invention which has been described hereinbefore is not intended to have any limitative character, and may be modified in any desirable way without thereby departing from the scope of the invention.
  • Apparatus for casting metal comprising a mandrel mounted to rotate about a vertical axis, a hollow mould encircling said mandrel and mounted to rotate about an axis parallel to but slightly spaced from the axis of said mandrel so that the inner wall of the mould approaches the outer wall of said mandrel more closely at one point. on its periphery than elsewhere, and means for supplying molten metal to said mould at an angular distance of between 30 and 120 from said one point preceding the point at which the mandrel and mould are closest.
  • Apparatus as claimed in claim 1 comprising means for adjusting the distance between said axes.
  • said mandrel comprises an outer sleeve having within it an eccentrically mounted inner sleeve, and an inner mandrel member rotatably mounted in said inner sleeve, said mandrel having a cylindrical outer surface and an inner core positioned eccentrically with respect to said outer sleeve which surrounds said mandrel, so that rotation of said inner sleeve within the bore of said outer sleeve causes the axis of said inner sleeve to shift relative to that of said mandrel.
  • the method of making hollow castings by vertical continuous casting comprising the steps of rotating a first cylindrical surface within a second cylindrical surface about an axis displaced from but parallel to that of said second cylindrical surface so that said surfaces approach each other most closely at one particular position and feeding molten metal between said surfaces at a feeding position reached by any given point on one of said surfaces between 30 and before it reaches said particular position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Centrifugal Separators (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
US273098A 1962-04-26 1963-04-15 Method and apparatus for vertical casting of hollow metalic bodies Expired - Lifetime US3268959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR895753A FR1329048A (fr) 1962-04-26 1962-04-26 Nouveau procédé de coulée continue verticale de corps creux métalliques et dispositif pour mettre en oeuvre ce procédé

Publications (1)

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US3268959A true US3268959A (en) 1966-08-30

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ID=8777741

Family Applications (1)

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US273098A Expired - Lifetime US3268959A (en) 1962-04-26 1963-04-15 Method and apparatus for vertical casting of hollow metalic bodies

Country Status (9)

Country Link
US (1) US3268959A (de)
BE (1) BE630715A (de)
CH (1) CH393642A (de)
DE (1) DE1282862B (de)
ES (1) ES287073A1 (de)
FR (1) FR1329048A (de)
GB (1) GB984053A (de)
LU (1) LU43468A1 (de)
NL (2) NL126287C (de)

Cited By (6)

* 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
US3487876A (en) * 1967-12-18 1970-01-06 Robert Bucci Apparatus for casting metal tubing by continuous process
DE1558297B1 (de) * 1966-05-31 1972-03-09 Ile D Etudes De Centrifugation Vorrichtung zum unterbrechungsfreien Beschicken einer Rotations-Stranggiessvorrichtung,sowie Betriebsverfahren hierfuer
US3702630A (en) * 1971-01-05 1972-11-14 Centrifugation Soc Civ De Apparatus for casting solid cylindrical metallic objects
US4137961A (en) * 1976-01-20 1979-02-06 Creusot-Loire Vallourec Continuous casting of metals
US4546816A (en) * 1981-02-11 1985-10-15 Schwarz Gerhard E Method and apparatus of continuously casting hollow round billets with a hypocycloidal mandrel and an inside rolling process

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3583469A (en) * 1968-02-14 1971-06-08 Centrifugation Soc Civ Soc Civ Method of continuously casting solid state cylinders
FR2180494A1 (en) * 1972-04-18 1973-11-30 Etudes De Centrifugation Continuous rotative casting - produces hollow blanks with good internal and external surface qualities
DE3150659A1 (de) * 1981-02-11 1982-09-02 Gerhard E. 44012 Avon Lake Ohio Schwarz Herstellungsweise und vorrichtung zum stranggiessen von runden hohlknueppeln mit einem rolldorn und einem inneren walzverfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538810A (en) * 1940-03-08 1941-08-18 Gen Electric Co Ltd Improvements in and relating to water heaters
US2752648A (en) * 1951-04-05 1956-07-03 Ile D Etudes De Centrifugation Apparatus for the production of tubular metallic objects
FR1253308A (fr) * 1959-12-29 1961-02-10 Ile D Etudes De Centrifugation Procédé pour la coulée de corps creux métalliques
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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538810A (en) * 1940-03-08 1941-08-18 Gen Electric Co Ltd Improvements in and relating to water heaters
US2752648A (en) * 1951-04-05 1956-07-03 Ile D Etudes De Centrifugation Apparatus for the production of tubular metallic objects
FR1253308A (fr) * 1959-12-29 1961-02-10 Ile D Etudes De Centrifugation Procédé pour la coulée de corps creux métalliques
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 (6)

* 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
DE1558297B1 (de) * 1966-05-31 1972-03-09 Ile D Etudes De Centrifugation Vorrichtung zum unterbrechungsfreien Beschicken einer Rotations-Stranggiessvorrichtung,sowie Betriebsverfahren hierfuer
US3487876A (en) * 1967-12-18 1970-01-06 Robert Bucci Apparatus for casting metal tubing by continuous process
US3702630A (en) * 1971-01-05 1972-11-14 Centrifugation Soc Civ De Apparatus for casting solid cylindrical metallic objects
US4137961A (en) * 1976-01-20 1979-02-06 Creusot-Loire Vallourec Continuous casting of metals
US4546816A (en) * 1981-02-11 1985-10-15 Schwarz Gerhard E Method and apparatus of continuously casting hollow round billets with a hypocycloidal mandrel and an inside rolling process

Also Published As

Publication number Publication date
NL126287C (de)
NL291746A (de)
CH393642A (fr) 1965-06-15
DE1282862B (de) 1968-11-14
FR1329048A (fr) 1963-06-07
ES287073A1 (es) 1963-07-16
BE630715A (de)
LU43468A1 (de) 1963-06-04
GB984053A (en) 1965-02-24

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