EP0021282B1 - Dispositif pour alimenter en métal fondu une installation de coulée centrifuge pour tuyaux et autres corps tubulaires - Google Patents

Dispositif pour alimenter en métal fondu une installation de coulée centrifuge pour tuyaux et autres corps tubulaires Download PDF

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Publication number
EP0021282B1
EP0021282B1 EP80103311A EP80103311A EP0021282B1 EP 0021282 B1 EP0021282 B1 EP 0021282B1 EP 80103311 A EP80103311 A EP 80103311A EP 80103311 A EP80103311 A EP 80103311A EP 0021282 B1 EP0021282 B1 EP 0021282B1
Authority
EP
European Patent Office
Prior art keywords
channel
casting
shell
inclination
cast iron
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
Application number
EP80103311A
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German (de)
English (en)
French (fr)
Other versions
EP0021282A1 (fr
Inventor
Michel Pierrel
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
Original Assignee
Pont a Mousson SA
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.)
Filing date
Publication date
Application filed by Pont a Mousson SA filed Critical Pont a Mousson SA
Priority to AT80103311T priority Critical patent/ATE3759T1/de
Publication of EP0021282A1 publication Critical patent/EP0021282A1/fr
Application granted granted Critical
Publication of EP0021282B1 publication Critical patent/EP0021282B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B22D13/12—Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
    • 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
    • B22D13/107—Means for feeding molten metal

Definitions

  • the present invention relates to the centrifugation of pipes or other tubular bodies of cast iron. It relates more particularly to centrifugal casting according to the De Lavaud process, in which liquid iron is poured into a rotary shell via a pouring channel supplied by a ladle while causing relative longitudinal movement between this channel and the shell, and the supply of the cast iron channel is interrupted before the spout has reached the outlet end of the shell.
  • this problem of simultaneous introduction of the same quantity of cast iron into the two interlocking ends is essentially resolved by providing along each pouring channel several retaining dams provided with regulation orifices casting jets.
  • the twin channels are tiltable around horizontal articulations provided upstream, in the vicinity of the ladle, and have a variable inclination, even during casting, and in any case only during the casting of the sockets, that is to say before the relative axial displacement of each channel with respect to each shell, in order to regulate the speed of flow of the cast iron.
  • a casting device for a De Lavaud type centrifuge machine of the aforementioned type with articulated channel, with variable inclination, and of the type comprising an approximately horizontal beam in door-to-door position. false supporting a pouring channel of approximately the same length, this device being characterized in that the channel is articulated on the beam in the vicinity of its pouring spout and in that the upstream end of the beam is fixed to a carriage mobile on which is articulated one end of a jack.
  • this device it is possible to raise the pouring channel at the end of casting, towards the end of the relative axial displacement of the channel and of the casting shell, and not, as in the cited earlier patent DE-C-704 037, at the start of casting, before the relative axial displacement in translation, and it is possible to thus strongly modify the inclination of the pouring channel between a non-inclined position relative to the axis of the shell at the start of casting, when the pouring spout is located inside the interlocking end of the casting shell, and a strongly inclined position at an acute angle relative to the axis XX of the casting shell, at the end of casting, when the spout is located inside the plain end of the shell.
  • the centrifuge installation shown in Figs. 1 to 5 comprises a machine 1 for centrifuging pipes 2 of interlocking cast iron having a diameter of, for example, between 600 and 2000 mm. These numerical values of diameters are given for information only and are not limitative.
  • a human silhouette 3 is shown next to the machine.
  • the machine 1 essentially comprises a rotary shell 4 for molding an approximately horizontal axis X-X housed in a casing 5 and carried by rollers 6 of which at least one is a motor.
  • the rollers 6 are carried by a fixed frame 7 parallel to the axis X-X.
  • the shell 4 is supplied with liquid iron by a casting device 8 which will be described in detail below.
  • This casting device comprises a carriage 9 movable in translation on the frame 7 parallel to the axis XX, so as to be able to introduce a channel-beam assembly 10 into the shell up to the most distant end thereof, which is provided with a socket 11.
  • the casting device 8 is itself supplied with cast iron by a tilting casting ladle 12, shown partially, the tilting axis of which is fixed.
  • the installation comprises an extraction device 13 essentially consisting of a rolling track 14 parallel to the axis XX on which two support carriages 15 roll, 16 and an extractor carriage 17, and a lifting device 18.
  • the device 13 may in particular be of the type described in patent FR 74.23701.
  • the assembly 10 comprises a support beam 19 of great inertia and a composite channel 20.
  • the beam 19 is fixed by its upstream end to the carriage 9 and extends cantilevered towards the centrifugation machine 1.
  • the free end of this beam has two horizontal lateral cylindrical studs 21, perpendicular to the axis XX and located in the extension of one another.
  • the channel 20 consists of a cradle 22 in which a pouring chute 23 fitted upstream of a weir 24 and downstream of a pouring spout 25 and composed of a certain number of successive segments.
  • the chute 23 could moreover be in one piece.
  • the cradle 22 extends downstream to the pouring spout 25. A little upstream thereof, it externally comprises two cylindrical lateral half-eyelets 26 corresponding respectively to the upper part of the pins 21 of the beam 19 and based on these.
  • a yoke 27 projects under the cradle.
  • a double-acting jack 28 is articulated on the one hand to this yoke, on the other hand to another yoke 29 provided at the front of the carriage 9.
  • the composite channel 20 is mounted tilting around its downstream end between a roughly horizontal low position shown in FIGS. 1 and 2 and a high position inclined by an angle ce to the horizontal, shown in FIG. 3. These two extreme positions correspond respectively to the fully retracted state and to the fully extended state of the jack 28.
  • the casting device 10 also includes a flow control device shown diagrammatically in FIG. 8.
  • This regulating device comprises a detector 30 of the level of the cast iron in the vicinity of the pouring spout 25 connected to a spool valve 31 with two positions controlling the supply of the jack 28 with pressurized fluid.
  • the detector 30 is an inductor connected by electric wires 32 to a pilot electromagnet 33 acting on the distributor's counter 31 against a return spring 34.
  • the inductor 30 is mounted outside the channel spout, and therefore out of direct contact with the cast iron. It essentially consists of a coil sensitive to the presence of cast iron at a given level N, below which it maintains a supply of electric current on line 32 and below which it cuts this supply.
  • pressurized fluid is sent to the lower chamber of the jack 28, which causes the inclination of the channel 20; in the second case, this fluid is sent to the upper chamber of the jack 28 to bring the channel 20 back to its low position. In each case, the unpowered chamber of the jack is discharged.
  • the pilot device 33 is also equipped with a timer 33a capable of cutting off the supply of electric current when a displayed time has elapsed.
  • the carriage 9 moves in translation in direction f until the pouring spout 25 of the channel 20 is inside the interlocking end 11 of the shell 4 driven in rotation around axis XX. It is at this moment that the liquid iron is poured into the weir 11 through the pocket 12 and that it begins to flow into the shell.
  • the carriage 9 then sets off again in translation in the opposite direction (arrow g) so as to make the spout 25 run the entire length of the shell until it exits through the plain end thereof.
  • the inclination of the channel 10 can be varied if necessary by means of the jack 28 to modulate the rate of cast iron poured by the spout 25 at any point of the shell. This is how if we notice on the centrifuged pipes an excess thickness or a thinning well localized and always in the same place, we can remedy it by instantly increasing the inclination of the channel (for a thinning) or by decreasing it instantly ( for an extra thickness) at the moment when the beak 25 reaches the point of the shell where the irregularity to be corrected takes place, then by bringing the channel at its usual inclination, and this keeping constant both the tilting speed of the bag 12 and the translation speed of the carriage 9. This correction does not involve the regulating device of FIG. 8.
  • the jack 18 is then actuated again so as to gradually increase the inclination of the assembly 10 in order to deposit a constant quantity of cast iron throughout the shell 4, that is to say - say so that the flow rate at the pouring spout 25 remains constant until the latter leaves the shell.
  • the assembly 10 rocks around the two journals 21 of the beam 19.
  • the increase in the inclination of the channel 20 compensates for the lack of supply upstream, so that the end with plain end of the rotary shell receives the same turns of liquid iron, under the same thickness, as before the interruption of the supply. It follows that the centrifuged pipe 2 has a plain end of the same thickness and the same inclination of turns as its current part, and that the quality of this pipe is regular until the plain end.
  • this increase in the inclination can be controlled automatically by the device of FIG. 8, which intervenes, after the interruption of the supply of the weir 24, as soon as the level of the cast iron drops in the vicinity of the pouring spout 25.
  • the channel 20 is almost emptied of its liquid iron.
  • the jack is retracted, for example under the control of the chronometer 33a, to lower the assembly 10 and return it to the normal low rest position of the cradle 22 on the support beam 19 for the next casting.
  • Figs. 6 and 7 illustrate a variant of the invention in which the pouring chute 23a is in one piece and devoid of support cradle. In this case, the half-eyelets 26 are carried directly by this chute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Casting Devices For Molds (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Prostheses (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP80103311A 1979-06-25 1980-06-13 Dispositif pour alimenter en métal fondu une installation de coulée centrifuge pour tuyaux et autres corps tubulaires Expired EP0021282B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103311T ATE3759T1 (de) 1979-06-25 1980-06-13 Vorrichtung zum zufuehren geschmolzenen metalls bei zentrifugalgiessmaschinen fuer roehren und andere zylindrische gegenstaende.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7916251 1979-06-25
FR7916251A FR2459698A1 (fr) 1979-06-25 1979-06-25 Procede et installation de coulee centrifuge

Publications (2)

Publication Number Publication Date
EP0021282A1 EP0021282A1 (fr) 1981-01-07
EP0021282B1 true EP0021282B1 (fr) 1983-06-15

Family

ID=9227044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103311A Expired EP0021282B1 (fr) 1979-06-25 1980-06-13 Dispositif pour alimenter en métal fondu une installation de coulée centrifuge pour tuyaux et autres corps tubulaires

Country Status (19)

Country Link
US (1) US4316495A (uk)
EP (1) EP0021282B1 (uk)
JP (1) JPS5832026B2 (uk)
AT (1) ATE3759T1 (uk)
AU (1) AU515665B2 (uk)
BR (1) BR8003941A (uk)
CA (1) CA1146716A (uk)
CS (1) CS261205B2 (uk)
DD (1) DD151704A5 (uk)
DE (1) DE3063760D1 (uk)
EG (1) EG14672A (uk)
ES (1) ES8102865A1 (uk)
FR (1) FR2459698A1 (uk)
IN (1) IN154392B (uk)
PL (1) PL133038B1 (uk)
RO (1) RO80873A (uk)
SU (1) SU1012789A3 (uk)
UA (1) UA6077A1 (uk)
YU (1) YU42341B (uk)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370719A (en) * 1980-11-17 1983-01-25 Amsted Industries Incorporated Control of centrifugal pipe casting operation
SE450694B (sv) * 1983-01-28 1987-07-20 Asea Ab Sett for centrifugalgjutning av ror
FR2561146B1 (fr) * 1984-03-16 1986-08-29 Pont A Mousson Procede et dispositif de coulee centrifuge
JPH059252Y2 (uk) * 1984-10-15 1993-03-08
GB2299534B (en) * 1994-02-18 1998-04-22 New Pro Foundries Limited Metal composite casting method
GB2286786A (en) * 1994-02-18 1995-08-30 New Pro Foundries Limited Metal composite casting
US8567155B2 (en) 2006-07-19 2013-10-29 Tom W Waugh Centrifugally cast pole and method
KR200462012Y1 (ko) 2009-07-17 2012-08-20 현대제철 주식회사 수평원심주조장치 주입관의 축조대
US8733424B1 (en) 2013-03-15 2014-05-27 United States Pipe And Foundry Company, Llc Centrifugal casting method and apparatus
US8910699B2 (en) 2013-03-15 2014-12-16 United States Pipe And Foundry Company, Llc Centrifugal casting method and apparatus
CN103611910B (zh) * 2013-11-26 2015-08-26 武昌船舶重工集团有限公司 一种防止小口径双相不锈钢轴套离心铸造裂纹缺陷的方法
CN111872340A (zh) * 2020-07-24 2020-11-03 湖北翊通铸业有限公司 一种球墨铸铁管的离心浇铸装置
US11491535B1 (en) 2021-07-12 2022-11-08 United States Pipe And Foundry Company, Llc Method and apparatus for estimating dimensional uniformity of cast object
CN113909464B (zh) * 2021-08-26 2023-03-14 合肥工业大学 一种多向调节流槽伸缩装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB212931A (en) * 1922-09-05 1924-07-03 Metallurg D Aubrives Et Viller Improvements in reservoirs and discharging tubes or channels for molten metal
FR646882A (fr) * 1926-01-09 1928-11-16 Metallurg D Aubrives Et Viller Dispositif permettant la fabrication par la force centrifuge de corps creux cylindriques dont le diamètre est petit par rapport à la longueur, ou de diamètre quelconque, mais de grande longueur
BE341924A (uk) * 1926-07-20
US1906511A (en) * 1931-09-23 1933-05-02 Sand Spun Patents Corp Charging machine
DE704037C (de) * 1939-08-20 1941-03-21 Eisenwerke Akt Ges Deutsche Verfahren und Vorrichtung zum gleichzeitigen Giessen mehrerer Hohlkoerper in einer Schleudergussmaschine
FR1260204A (fr) * 1960-03-25 1961-05-05 Cie De Pont A Mousson Dispositif perfectionné de commande de poche d'alimentation en métal fondu pour machine à couler par centrifugation
FR1586466A (uk) * 1968-09-04 1970-02-20
JPS541232A (en) * 1977-06-03 1979-01-08 Kubota Ltd Method and apparatus for pouring cast

Also Published As

Publication number Publication date
PL225121A1 (uk) 1981-03-13
US4316495A (en) 1982-02-23
EG14672A (en) 1984-09-30
YU155080A (en) 1983-09-30
AU5953880A (en) 1981-01-08
ATE3759T1 (de) 1983-06-15
SU1012789A3 (ru) 1983-04-15
ES492788A0 (es) 1981-02-16
JPS566767A (en) 1981-01-23
ES8102865A1 (es) 1981-02-16
BR8003941A (pt) 1981-01-13
YU42341B (en) 1988-08-31
DE3063760D1 (en) 1983-07-21
FR2459698A1 (fr) 1981-01-16
JPS5832026B2 (ja) 1983-07-09
FR2459698B1 (uk) 1983-04-15
PL133038B1 (en) 1985-05-31
RO80873A (ro) 1983-02-01
DD151704A5 (de) 1981-11-04
IN154392B (uk) 1984-10-20
CA1146716A (en) 1983-05-24
UA6077A1 (uk) 1994-12-29
AU515665B2 (en) 1981-04-16
EP0021282A1 (fr) 1981-01-07
CS261205B2 (en) 1989-01-12

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