US3651859A - Apparatus for centrifugal casting of tubular objects - Google Patents

Apparatus for centrifugal casting of tubular objects Download PDF

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Publication number
US3651859A
US3651859A US826039*A US3651859DA US3651859A US 3651859 A US3651859 A US 3651859A US 3651859D A US3651859D A US 3651859DA US 3651859 A US3651859 A US 3651859A
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United States
Prior art keywords
casing
water
sleeves
mold
water casing
Prior art date
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
US826039*A
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English (en)
Inventor
Hans Heinz Wahl
Alfons Gumiaskl
Gunther Lohmann
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Luitpoldhuette AG
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Luitpoldhuette AG
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Filing date
Publication date
Priority claimed from DE19681758026 external-priority patent/DE1758026C3/de
Application filed by Luitpoldhuette AG filed Critical Luitpoldhuette AG
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Publication of US3651859A publication Critical patent/US3651859A/en
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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
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101—Moulds

Definitions

  • the water jacket is mounted on wheels so that the entire assembly can be moved by means of a hydraulic cylinder in the direction of the longitudinal axis of the mold. This movement is along a fixed bed inclined slightly from the horizontal.
  • the molten metal is fed into the mold through a similarly inclined trough which is mounted at the upper end of the fixed bed and extends like a cantilever beam almost the full length of the mold when the mold is at the extreme upper position.
  • the machine operator brings the mold up to speed and actuates the mechanism controlling the tilting of the ladle. In a few seconds, the iron has filled the bell space, at which time, the operator starts the mold carriage longitudinally down the inclined bed.
  • the stream of iron discharged from the trough is distributed along the surface of the mold where it is held in place by centrifugal force and forms the pipe upon cooling.
  • mold rotation is stopped and the pipe is extracted from the mold by moving mold carriage longitudinally up the inclined bed while holding the pipe stationary.
  • the mold carriage is then moved back down the inclined bed to place the mold in a convenient position for setting the bell core, and if a mold coating is used, it may be applied during this stroke of the machine.
  • the bell core is then set and the mold carriage moved to the extreme upper end of the inclined bed to begin another casting cycle.
  • the distribution of the metal along the mold length during the casting operation is controlled by the operator who must commence movement of the mold assembly away from the trough at the correct moment or else the metal delivered to the bell end will not give the proper bell end thickness. For instance, if the carriage movement is started to soon the bell end will be too thin, and if it started late the bell end will be thick. Since it is usually impractical to place the machine operator in a position which commands a good view of the bell end of the mold, it is usually necessary to have a bell core setter, who is in a position which affords the best view of the bell end of the mold, signal the operator to start the mold carriage retraction away from the trough. This is called flagging and is accomplished by throwing a switch which turns on a light or other suitable signal on the operators panel.
  • the operator In addition to starting the mold retraction at the proper instant, the operator must also judge the proper position in which to stop the mold carriage momentarily while the spigot end of the pipe is being cast, following which, retraction of the mold carriage is completed and the ladle pouring is terminated. This is known as hand-checking and is necessary to build up the proper metal thickness at the spigot end of the mold. It is apparent that it is completely within the control of the operator who determines both the position and the duration of the stop. When the mold movement is stopped in the wrong position or for too short a time, the spigot end is made thin, and if it is stopped for too long a time, the spigot end is cast thick.
  • a further object of this invention is to provide a pipe casting machine which would allow for remaining the auxiliary parts mounted on the casing sleeves while replacing the water casing.
  • the present invention relates to a centrifugal pipe casting machine which comprises a water casing and an integral mold disposed therein, rotatably mounted on carriage provided with wheels and serving as a conveying means for the mold assembly.
  • Rotary movement to the water casing and the mold may be imparted by an electric motor mounted on the frame of the machine and operatively connected to the water casing through suitable gearing or belt-drive and through casing sleeves exteriorly mounted at the extremities of the water casing.
  • the wheels of the carriage are arranged to travel on rails fixed to an inclined base of the casting apparatus.
  • a piston operating in a cylinder secured to the base has its outer end connected to the carriage for moving the carriage to and from on the rails during the casting operation.
  • a pouring trough of a well-known type is fixed at its inlet by means of support which is rigidly mounted with respect to the base so that the outlet end may move in and out of the mold as the mold carriage is moved back and forth on its tracks.
  • Molten metal is supplied to the pouring trough through a spout curving downwardly from the outlet of a ladle. Titlting of the ladle is effected by means of a piston-cylinder arrangement about trunnions affixed to the ladle.
  • the novel aspect of this invention resides in the provision of a supporting casing sleeve on the end portions of the water casing.
  • the casing sleeves are detachably secured to the water casing and rotate therewith during the casting operations.
  • Auxiliary parts of the casting machine, such as cooling water supply and discharge system, ball bearings, sealing glands and various other attachments which are nonnally mounted on the water casing are, in accordance with the present invention, mounted on the casing sleeves.
  • Each casing sleeve is rotatably secured to and supported by a separate sled which is attached to an intermediate carriage platform of a carriage by means of a piston reciprocating in a double-acting cylinder.
  • This piston is rigidly secured to the sled and slidably communicates with the double-acting cylinder disposed within the intermediate carriage platform.
  • a support means is provided for the water casing.
  • the water casing is detached from the casing sleeves at both ends thereof and the pistons are actuated to disengage the casing sleeves from the water casing, leaving a detached water casing resting on the support means.
  • the water casing can subsequently be removed to any desired location by means of a crane.
  • FIG. 1. is a cross-sectional view of the water casing.
  • FIG. 2. is a cross sectional view of the pair of easing sleeves.
  • FIG. 3. is a cross-sectional view through the bell end of the centrifugal pipe casting machine.
  • FIG. 4. is a cross-sectional view through the spigot end of the pipe casting machine.
  • FIG. 5. is a view of the sled taken through plane of FIG. 3.
  • the water casing 10 separately illustrated in FIG. 1, has a plurality of circumferentially arranged lugs l2, 14 on its periphery.
  • mold 20 is positioned within water casing and is spaced therefrom by adjustable spacers 22 which project from the water casing into the cooling water chamber.
  • the mold illustrated in the drawings is integral at its end with the water casing, as is apparent from FIG. 3.
  • the casing sleeves 16, 18 are journaled over the end portions of water casing 10, and are secured thereto by means of bolts 24 projecting through lugs l2, l4 and into bores 26, 28 provided in the bell end and spigot end of the casing sleeves, respectively.
  • Cooling water supply and discharge assembly generally designated by numeral 30, is supported by the respective casing sleeves and is in communication with by the water casing 10 through conduit 34. Rotation of the water casing 10, together with the casing sleeves l6, 18, is facilitated by ball bearings 36 mounted around the circumference of the casing sleeves and disposed in supporting relationship. O-rings 38 and sealing glands 40 provide' for sealing between cooperating parts.
  • Rotation of the water casing, casing sleeves and the mold is effected by an electric motor suitably mounted on the frame of the casting machine through what may be a V- belt operatively engaging a drive-gear 42 on the casing sleeve 16.
  • Rotation of the mold assembly may also be effected by any other suitable means, such as cooperating set of gears.
  • the mold assembly is supported at each end on carriage 44 by structural elements forming chamber 46 and cylindrical support block 48. As is evident from FIGS. 3 and 4, the cylindrical support block 48 also forms a supporting surface for ball bearings 36.
  • Carriage 44 consists of sleds 50, 52 and an intermediate carriage flatform 54. Sled 52 is detachably secured to the intermediate carriage platform 54 by a pair of cooperating lugs 56, 58 situated on the sled and the intermediate carriage platform, slotted bolt 60, and wedge 62 driven into the slot.
  • Interaction between the intermediate carriage platform 54 and the sleds is further enhanced by a stem 64 which extends longitudinally from each sled, and a piston 66 attached to the stern and disposed for reciprocating movement in a doubleacting cylinder 68 provided at each end of the intermediate carriage platform 54.
  • Each piston 66 can be independently acuated, in a manner well known in the art, to impart relative movement between each sled and the intermediate carriage platform 54.
  • a plurality of swingable supports 70 are disposed on the carriage 44 along the extent of the water casing to provide additional support thereto. These supports are swung out whenever it is desired to remove the water casing.
  • the carriage is supported on wheels 72, 74 which ride on tracks disposed on an inclined surface.
  • sled 50 In operative relationship, sled 50, is firmly linked with the intermediate carriage platform 54 by aligned lugs 56, 58, bolt 60 and wedge 62 driven into the slot in said bolt 60. Sled 52 can be shifted relatively to the platform 54 for compensation of thermal expansions and contractions. Supports 70 are swung to their operative position and maintain water casing in the horizontical plane, relative to the inclination of the machine bed.
  • the mold assembly is rotated by a V-belt driven by an electric motor and engaged to the mold assembly through drive-gear 42.
  • Casing sleeves l6, 18 are rigidly secured to water casing 10 by bolts 24 and rotate therewith in unison.
  • the casing sleeves 16, 18 are disconnected from water casing 10 by extracting bolts 24, and sled 50, is disconnected from intermediate carriage portion 54 by removing wedge 62 and bolt 60.
  • a crane is moved over the water casing and cables are draped around the water casing.
  • Supports 70 are swung out from under the water casing and the double-acting cylinders 68 are actuated to cause movement of the sleds away from the intermediate carriage platform 54. Since the casing sleeves 16, 18 are rotatably secured to respective sleds '50, 52, outward movement of the sleds will eventually clear casing sleeves 16, 18 from water casing 10, leaving the water casing suspended by the crane cables.
  • the water casing is moved by crane to any desired location.
  • another water casing is installed by positioning it between the casing sleeves, actuating the double-acting cylinders to move the sleds inwardly until the water casing is snugly nestled within opposing casing sleeves.
  • the reassembly procedure is completed by securely fastening the casing sleeves to the water casing, and the sleds to the intermediate carriage platform.
  • a centrifugal pipe casting apparatus comprising a water casing provided with casing sleeves journaled on its ends mounted for rotation, a mold disposed in said water casing in spaced relationship and rotatable therewith in unison, means for detachably securing said casing sleeves to the water casing for rotation, auxiliary casting parts mounted on said casing sleeves, moveable support means for said sleeves comprised of an intermediate carriage platform and a detachable sled on each end of said platform, means for rotatably affixing said sleeves to said sleds and means for imparting relative movement between each sled and the intermediate carriage platform whereby the casing and mold can be separated from the rest of the apparatus without disassembly thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US826039*A 1968-03-22 1969-03-21 Apparatus for centrifugal casting of tubular objects Expired - Lifetime US3651859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681758026 DE1758026C3 (de) 1968-03-22 Korsett für Kokillen in einer Schleudergießmaschine

Publications (1)

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US3651859A true US3651859A (en) 1972-03-28

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Application Number Title Priority Date Filing Date
US826039*A Expired - Lifetime US3651859A (en) 1968-03-22 1969-03-21 Apparatus for centrifugal casting of tubular objects

Country Status (4)

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US (1) US3651859A (fr)
JP (1) JPS4813212B1 (fr)
FR (1) FR2004528A1 (fr)
GB (1) GB1206077A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718178A (en) * 1970-09-09 1973-02-27 Pont A Mousson Fond Sealing means for a machine for centrifugally casting pipes
US3736980A (en) * 1970-12-30 1973-06-05 Etudes De Centrifugation Mold for continuous centrifugal casting
US3796253A (en) * 1970-09-09 1974-03-12 Pont A Mousson Fond Device for centering a centrifugal casting mould for tubular bodies
US3967674A (en) * 1974-02-20 1976-07-06 Pont-A-Mousson S.A. Sealing structure for a machine for centrifugally casting pipes and machine including said structure
US5277242A (en) * 1992-10-05 1994-01-11 American Cast Iron Pipe Co. Pipe casting machine having improved pipe mold stabling rings

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE181704C (fr) *
US1347582A (en) * 1918-11-01 1920-07-27 Us Cast Iron Pipe And Foundry Centrifugal casting-machine
US1469206A (en) * 1922-02-21 1923-10-02 Anthony Thomas Peacock Pipe manufacture
US1673028A (en) * 1926-11-23 1928-06-12 Us Cast Iron Pipe & Foundry Co Centrifugal pipe-casting machine
US1767024A (en) * 1928-06-29 1930-06-24 Us Cast Iron Pipe & Foundry Co Centrifugal pipe-mold structure
US1958109A (en) * 1931-12-24 1934-05-08 Moore Drop Forging Company Method of making alpha casting of different metals
US2123037A (en) * 1937-06-07 1938-07-05 Frank G Carrington Centrifugal casting machine
US2252219A (en) * 1939-11-03 1941-08-12 Trotzke Frank Centrifugal tube casting machine
US2461765A (en) * 1949-02-15 Method of making composite
US2500799A (en) * 1943-07-08 1950-03-14 Max Kuniansky Stiffener for centrifugal molds
FR995992A (fr) * 1945-04-04 1951-12-11 Pompes Noe L Machine perfectionnée pour le moulage centrifuge de tuyaux
US2681485A (en) * 1952-09-20 1954-06-22 Electric Steel Foundry Co Centrifugal casting of metal
GB883237A (en) * 1959-03-28 1961-11-29 Rheinstahl Eisenwerke Ge An improved method of controlling casting machines

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461765A (en) * 1949-02-15 Method of making composite
DE181704C (fr) *
US1347582A (en) * 1918-11-01 1920-07-27 Us Cast Iron Pipe And Foundry Centrifugal casting-machine
US1469206A (en) * 1922-02-21 1923-10-02 Anthony Thomas Peacock Pipe manufacture
US1673028A (en) * 1926-11-23 1928-06-12 Us Cast Iron Pipe & Foundry Co Centrifugal pipe-casting machine
US1767024A (en) * 1928-06-29 1930-06-24 Us Cast Iron Pipe & Foundry Co Centrifugal pipe-mold structure
US1958109A (en) * 1931-12-24 1934-05-08 Moore Drop Forging Company Method of making alpha casting of different metals
US2123037A (en) * 1937-06-07 1938-07-05 Frank G Carrington Centrifugal casting machine
US2252219A (en) * 1939-11-03 1941-08-12 Trotzke Frank Centrifugal tube casting machine
US2500799A (en) * 1943-07-08 1950-03-14 Max Kuniansky Stiffener for centrifugal molds
FR995992A (fr) * 1945-04-04 1951-12-11 Pompes Noe L Machine perfectionnée pour le moulage centrifuge de tuyaux
US2681485A (en) * 1952-09-20 1954-06-22 Electric Steel Foundry Co Centrifugal casting of metal
GB883237A (en) * 1959-03-28 1961-11-29 Rheinstahl Eisenwerke Ge An improved method of controlling casting machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718178A (en) * 1970-09-09 1973-02-27 Pont A Mousson Fond Sealing means for a machine for centrifugally casting pipes
US3796253A (en) * 1970-09-09 1974-03-12 Pont A Mousson Fond Device for centering a centrifugal casting mould for tubular bodies
US3736980A (en) * 1970-12-30 1973-06-05 Etudes De Centrifugation Mold for continuous centrifugal casting
US3967674A (en) * 1974-02-20 1976-07-06 Pont-A-Mousson S.A. Sealing structure for a machine for centrifugally casting pipes and machine including said structure
US5277242A (en) * 1992-10-05 1994-01-11 American Cast Iron Pipe Co. Pipe casting machine having improved pipe mold stabling rings

Also Published As

Publication number Publication date
GB1206077A (en) 1970-09-23
FR2004528A1 (fr) 1969-11-28
JPS4813212B1 (fr) 1973-04-26
DE1758026A1 (de) 1970-12-10
DE1758026B2 (de) 1975-09-11

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