US3438427A - Machine for centrifugally casting pipes - Google Patents

Machine for centrifugally casting pipes Download PDF

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Publication number
US3438427A
US3438427A US585368A US3438427DA US3438427A US 3438427 A US3438427 A US 3438427A US 585368 A US585368 A US 585368A US 3438427D A US3438427D A US 3438427DA US 3438427 A US3438427 A US 3438427A
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US
United States
Prior art keywords
blocks
machine
girder
stepped
stand
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
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US585368A
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English (en)
Inventor
Pierre Edouard Lorang
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.)
Pont a Mousson SA
Centre de Recherches de Pont a Mousson
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Pont a Mousson SA
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Application filed by Pont a Mousson SA filed Critical Pont a Mousson SA
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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
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • B22D13/023—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 horizontal
    • 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

Definitions

  • the present invention relates to centrifugally casting tubular bodies and more particularly to machines of the t-ype in which the rotary mould or shell is mounted on a stand having a variable inclination.
  • Machines of this type are known which are employed for casting thick-walled short tubular bodies. These machines have no casting trough and are fed with liquid metal by a pouring ladle which pours the metal into the mould in a single jet.
  • the metal which partially ills the mould, is ⁇ distributed over the wall of the latter by centrifugal force and forms a cavity whose shape depends on the inclination of the stand, that is, the inclination of the mould driven in rotation.
  • the inclination must be high so as to enable the mould, which forms a container, to retain the metal, and prevent it from overflowing.
  • the object of the invention is to provide a machine for centrifugally casting tubular bodies which has both the advantages of the system including a pivoted stand and those of the fixed stand system having rigid supports or 3,438,427 Patented Apr. 15, 1969 ICC bases.
  • the machine according to the invention comprises a stand which is pivoted to a horizontal transverse pin and rests on the ground through pairs of superimposed blocks of which one block is fixed and the other movable, one of said blocks having a single bearing face whereas the other comprises a step-like bearing face, a control device for shifting the blocks with respect to each other in each pair so that in each pair of blocks the blocks are iu mutual contact by the required step of the step-like face.
  • FIG. 1 is a diagrammatic elevational view of a machine according to the invention
  • FIG. 2 is a cross-sectional view of the machine taken along line 2 2 of FIG. l but on an enlarged scale;
  • FIGS. 3 and 4 are partial sectional views on the same scale as FIG. 2 and taken along lines 3 3 and 4 4 of FIG. l respectively;
  • FIG. 5 is a longitudinal sectional view taken along line 5 5 of FIG. 4;
  • FIG. 6 is a sectional view of a detail of the machine according to the invention on a smaller scale than that of FIGS. 2-5;
  • FIG. 7 is a view similar to FIG. 1 of the machine in the course of changing the inclination of the machine;
  • FIG. 8 is a view similar to FIG. l in the case of a pipe having a larger diameter
  • FIG. 9 is a View similar to FIG. 5 of a variant of the invention.
  • FIGS. 1-8 the invention is applied to a centrifugal casting machine for example of the de Lavaud type for casing pipes T (FIGS. 1 and 8).
  • This machine comprises a pivotal pouring ladle A which pours the molten metal into a trough or spout B.
  • the latter pours the metal into the shell or mould C carried by a carriage D which is movable along a runway.
  • a withdrawing carriage E Movable in the axial extension of the mould-support carriage D and its runway, is a withdrawing carriage E which is adapted to take hold of the cast pipe and withdraw it from the mould.
  • the withdrawing carriage E is also movable along a runway.
  • the stand is a composite braced girder 1 comprising for example H-section members (see FIG. 2).
  • This girder 1 supports the runway for the carriage C, the ladle A and the trough B.
  • the runway of the withdrawing carriage E is carried by a braced composite girder 2 which is in the extension of the girder 1.
  • the girders 1 and 2 are pivotally interconnected at their adjacent ends by a common horizontal shaft or pin 3 (FIGS. l and 2) carried by bearings, the girder 1 being connected to the shaft 3 by a depending portion 4al and the shaft 2 being connected to the shaft 3 by an extension 2a.
  • a common horizontal shaft or pin 3 (FIGS. l and 2) carried by bearings, the girder 1 being connected to the shaft 3 by a depending portion 4al and the shaft 2 being connected to the shaft 3 by an extension 2a.
  • girders 1 and 2 are raisable or lowerable by jacks 5 and 6 pivoted to supports 7 and 8.
  • the girders 1 and 2 can be supported at various points in their lengths and in accordance with variable inclinations, while remaining in the axial extension of each other, by pairs of blocks, for example three pairs of blocks.
  • Each pair of blocks comprises a lower block 9 carried by a iixed support 10 and provided with a single upper bearing face 11, and an associated upper block 12 whose active lower bearing face 13 is in the shape of inverted steps.
  • the girder 1 carries a longitudinally extending lead-screw 14 mounted, for example but not exclusively, on its longitudinal axis by means of a oating suspension.
  • This floating suspension is for example a-rranged in the following -manner (FIG. 6).
  • a number of brackets 15, for example secured to the bracing members of the composite girder 1, are provided with vertically elongated apertures 16. Slidable in each of the apertures is a pair of pins 17 rigid with a lug 18 which carries a sleeve 19 (FIGS.
  • each of the blocks 12 constitutes a movable carriage which is suspended by rollers 22 from the treads of the H-section members of the composite girder 1.
  • the rollers 22 are rollable on the upper face of the flanges of said treads (FIG. 3).
  • the blocks 12 act as a support for the girder 1 through their upper faces 23 which ⁇ are in contact with the lower treads of the H-section members of the girder (FIG. 4).
  • Each block 12 carries a sleeve 24 which forms a nut for the lead-screw 14 for the purpose of shifting the block.
  • the heights of the steps of the stepped face 13 can be equal or different. They are provided -for inclining the stand 1 at different inclinations on the order of only a few degrees from a minimum value of on the order of 1.
  • the fixed blocks 9 have such heights as to support the blocks 12 on the three blocks 9 simultaneously so as to ensure a good distribution of the load of the stand and machine.
  • the girder 2 carrying the runway of the withdrawing carriage E also has an inclination which is adjustable by means of blocks and other means ⁇ similar to those pertaining to the girder 1 and carrying the same reference numerals to lwhich the letter a has been added.
  • the stepped blocks 12a and the corresponding fixed blocks and supports 9a and 10a are for example two in number instead of being three.
  • the machine according to the invention ⁇ operates in the following manner:
  • the stand of the machine For small-diameter pipes having, for example, a diameter of about 50-60 mm., the stand of the machine must be inclined to the horizontal to the maximum extent. This inclination is necessary for the flow of the liquid iron in the casting trough. A rapid ow is necessary and results from the slope or inclination so that the stream of liquid iron of very small section has no time to cool and obstruct the trough. However, this inclination is small, and is on the order of merely a few degrees. As can be seen, the girders 1 and 2 are in exact alignment with each other. The girder 1 rests on the spaced Iblocks 9 through the stepped-blocks 12 (FIG.
  • the girders 1 and 2 behave in the manner of relatively elastically yieldable girders which bear on a plurality of supports (stepped blocks 12, 12a, xed blocks 9, 9a and supports 10, 10a). These various supports are necessary owing to the movement of mobile loads, namely the carriage D and the withdrawing carriage E.
  • the girder 1 is raised and pivots about the horizontal pivot shaft 3.
  • the stepped blocks 12 are raised from the fixed blocks ⁇ 9 as seen in IFIGS. 3-7.
  • the adjustable blocks 12 no longer serve as a support by their upper face 23 for the lower flanges of the girder 1 but are suspended from said flanges by the rollers 22 (-FIG. 3).
  • the girder 1 being thus raised, the lead-screw 1'4 is rotated in lthe suitable direction by means of the handwheel 21 so as to shift the blocks 12 and bring the upper steps of their stepped faces 13 in front of the xed blocks 9.
  • the blocks 12 must be shifted ltowards the left (as viewed in these figures).
  • the jacks 5 are once more lowered so as to allow the girder 1 to rest on the blocks 9 through the blocks 12.
  • the same procedure is adopted. However, it is the lower steps of the stepped faces 13a which are brought in front of the blocks 9B. It should be noted -that during the raising of the girder 2 for shifting the stepped blocks 12a, the girder 2 is no longer in the geometric extension of the girder 1 but makes an angle therewith.
  • a single machine capable of receiving moulds of different diameters ranging for example from a small diameter of around 50 mm. to a much larger diameter of around 30G-400 mm., is cap'able of casting pipes of different diameters my modifying the inclination of stand.
  • the simple and strong structure according to the invention economizes several special machines for the different diameters of pipes to be produced and increases the range of possible production with a single machine.
  • FIG. 9 shows a variant of the invention in which the lead-screw 14, instead of being mounted as shown in FIG. 6, is journalled in supports such as .25 which are rigidly secured to lthe composite girder 1, whereas the stepped blocks 12 are mounted to float relative to the lead-screw 14.
  • the blocks 12 are floatably mounted in the lpresently-described embodiment by means of n'ngs 26 which have vertically elongated apertures 27 and are rigid with the stepped blocks 12, these rings being mounted on each side of nuts 24' which are vertically movable and cooperate with the lead-screw 14 so as to shift the blocks 12 axially of the lead-screw.
  • the invention is also applicable to centrifugal casting machines which have no pouring trough.
  • the invention is also applicable to machines provided with a pipe-withdrawing means which is fixed instead of being movable, this means being mounted on a fixed horizontal stand or on an extension of the girder 1 on the other side of the pivot shaft 3.
  • a single jack 5 and a single jack 6 could be provided.
  • the stepped blocks could be fixed and rest on the ground, the cooperating associated blocks having a single bearing face being in this case movable along the composite girder or girders.
  • a structure comprising a stand pivoted to a transverse horizontal pivot shaft, pairs of superimposed blocks mounted on the ground and supporting the stand, one of the blocks of each pair of blocks being Xe'd relative to the ground and the other block being movable, one of the block of each pair of blocks having a single bearing face whereas the other block has a stepped bearing face, a control n device operatively connected to the movable blocks for moving the movable blocks relative to the fixed blocks, whereby in each pair of blocks the two blocks are in contact with each other by the desired step of said stepped face.
  • a structure as claimed in claim 1, comprising at least one jack for supporting the stand at one of the ends of the stand and screw-andmut means for shifting the movable blocks.
  • each block carries a sleeve which is screw threaded and constitutes a nut for a lead-screw and a floatably mounted device suspends said lead-screw from the stand.
  • said floatably mounted device comprises brackets having vertically elongated apertures and vsaid sleeves are movably mounted in said apertures.
  • a structure as claimed in c'laim ⁇ 6, comprising *fixed supports in which the lead-screw is rotatably mounted, the nuts being oatably mounted relative lto the movable blocks.
  • a structure ⁇ as claimed in claim 1, comprising rollers through which the movable blocks are suspended from the stand of the machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Casting Devices For Molds (AREA)
US585368A 1966-06-21 1966-10-10 Machine for centrifugally casting pipes Expired - Lifetime US3438427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR66219A FR1490648A (fr) 1966-06-21 1966-06-21 Machine perfectionnée à couler les tuyaux par centrifugation

Publications (1)

Publication Number Publication Date
US3438427A true US3438427A (en) 1969-04-15

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ID=8611374

Family Applications (1)

Application Number Title Priority Date Filing Date
US585368A Expired - Lifetime US3438427A (en) 1966-06-21 1966-10-10 Machine for centrifugally casting pipes

Country Status (8)

Country Link
US (1) US3438427A (fr)
BE (1) BE696107A (fr)
CH (1) CH474299A (fr)
DE (1) DE1558191B1 (fr)
ES (1) ES341242A1 (fr)
FR (1) FR1490648A (fr)
GB (1) GB1183188A (fr)
SE (1) SE327511B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116260A (en) * 1976-04-13 1978-09-26 Pont-A-Mousson S.A. Installation for the centrifugal casting of large pipes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853755A (en) * 1955-01-13 1958-09-30 Beyer John Henry Centrifugal casting method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1550126A (en) * 1923-03-31 1925-08-18 Tompkins Edward Devoe Process of and apparatus for casting metal in a rotary mold
US1620829A (en) * 1923-08-07 1927-03-15 Sand Spun Patents Corp Method of and apparatus for centrifugally casting metal bodies
DE436713C (de) * 1923-08-18 1926-11-06 William Davis Moore Verfahren und Vorrichtung zur Herstellung von Rohren durch Schleuderguss in wagerechten Gussformen
US1802613A (en) * 1925-04-11 1931-04-28 Paper & Textile Machinery Comp Centrifugal casting machine
DE469571C (de) * 1925-09-13 1928-12-15 Sand Spun Patents Corp Schleudergiessmaschine
US1758483A (en) * 1928-05-18 1930-05-13 Us Cast Iron Pipe & Foundry Co Method for casting pipes
US1746374A (en) * 1928-05-18 1930-02-11 Us Cast Iron Pipe & Foundry Co Centrifugal pipe-casting machine
US1987752A (en) * 1930-08-30 1935-01-15 Cleveland Graphite Bronze Co Bearing manufacture
US1992739A (en) * 1933-02-10 1935-02-26 Centrifugal Pipe Corp Centrifugal casting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853755A (en) * 1955-01-13 1958-09-30 Beyer John Henry Centrifugal casting method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116260A (en) * 1976-04-13 1978-09-26 Pont-A-Mousson S.A. Installation for the centrifugal casting of large pipes

Also Published As

Publication number Publication date
SE327511B (fr) 1970-08-24
FR1490648A (fr) 1967-08-04
CH474299A (fr) 1969-06-30
BE696107A (fr) 1967-09-01
ES341242A1 (es) 1968-06-16
DE1558191B1 (de) 1970-07-02
GB1183188A (en) 1970-03-04

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