EP0477119B1 - Dispositif intermédiaire pour la coulée de pièces moulées - Google Patents

Dispositif intermédiaire pour la coulée de pièces moulées Download PDF

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Publication number
EP0477119B1
EP0477119B1 EP91470021A EP91470021A EP0477119B1 EP 0477119 B1 EP0477119 B1 EP 0477119B1 EP 91470021 A EP91470021 A EP 91470021A EP 91470021 A EP91470021 A EP 91470021A EP 0477119 B1 EP0477119 B1 EP 0477119B1
Authority
EP
European Patent Office
Prior art keywords
mould
feed shaft
casting
metal
mold
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
EP91470021A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0477119A1 (fr
Inventor
Daniel Boudot
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
Publication of EP0477119A1 publication Critical patent/EP0477119A1/fr
Application granted granted Critical
Publication of EP0477119B1 publication Critical patent/EP0477119B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Definitions

  • the present invention relates to the low pressure casting of metal with a high melting point.
  • It relates more particularly to an intermediate wear device for the implementation of a process for the low pressure casting of molded parts of metal alloy with high melting point such as cast iron, steel, superalloy from a melting furnace or ladle in a sand mold, under the driving pressure of a gas, by feeding the mold from bottom to top.
  • high melting point such as cast iron, steel, superalloy from a melting furnace or ladle in a sand mold
  • French patent FR-A-1 187 724 discloses a pressure mold supply tube.
  • the upper end of the supply tube is fixed to a housing.
  • a mixture fills the voids between the housing and the supply tube, thus ensuring a seal.
  • a ring is mounted on the upper part of the housing.
  • the intermediate device produced according to patent FR-A-1 187 724 does not prevent or reduce the thermal and mechanical stresses undergone by the supply tube. Indeed, this device although placed in the upper part surrounds the tube, which rises as high as the device. The cooling of the metal starts from the top. So the tube undergoes more violent thermal shocks than the device which is distant from the metal by the thickness of the tube.
  • the metal solidifies in the supply tube.
  • the solidified metal is removed mechanically, which causes mechanical shock in the tube.
  • thermal and mechanical shock leads to rapid wear of the tube which, in the first instance, destroys the surface finish, which causes leaks and, in the second phase, forces the tube to be replaced.
  • the oven must be stopped and then dried, which immobilizes said melting furnace or the ladle and the mold.
  • low pressure casting installations are known in which a part forming an intermediate device is placed on the pouring channel.
  • the upper part of the intermediate piece is positioned in contact with the lower part of said mold, the device being centered relative to the casting well open towards the bottom of the mold, the lower part of the device coming into contact with the upper face of the nose of the mold. casting.
  • a first object of the present invention aims to remedy these drawbacks, and to provide various advantages consisting essentially in reducing the wear of the supply tube or the pouring channel supplying the mold with liquid metal, by eliminating mechanical and thermal shocks in the tube or in the channel by bringing these shocks to an intermediate device.
  • Another object of the invention is to eliminate the risks of leakage of liquid metal.
  • the intermediate wear device for implementing a process for the low pressure casting of molded parts is characterized according to the invention in that the latter comprises the following parts, a ring having a flat base on its lower face and a hollow cylindrical internal part opening out at its upper face and at the level of its lower face and a cylindrical sleeve made of refractory material, its outer casing fitting into the hollow internal part of the ring by the interposition of packed concrete, the upper and lower faces of the sleeve coming at the level of the upper and lower faces of the Ring.
  • a seal is interchangeable with respect to the mold and with respect to the device according to the invention formed by the ring and the sleeve.
  • the intermediate device is characterized in that it has a flat upper face and a flat lower face, the upper face being included in a plane parallel to said lower face.
  • the intermediate wear device has an upper face merged in the same horizontal plane as the lower face of the mold.
  • the device according to the invention comprises a hollow cylindrical internal part extending the runner in a regular section and connected to the supply well of the mold.
  • this device is removable, being detachably fixed relative to the pouring nose.
  • said device comprises a sealed and refractory junction between the sleeve and the refractory lining of the channel of the pouring nose obtained by a bead of rammed earth crushed by the positioning of the device, said bead forming a joint.
  • Another object of the invention relates to a supply tube forming a low pressure casting channel supplying metal with an imprint of a mold in blind sand comprising at least one casting well open downwards, the metal being brought to the imprint via the tapping well by the gas pressure above atmospheric pressure, on the free surface of the liquid metal contained in a sealed enclosure, said supply tube being provided with a device as described above.
  • the imprint can be supplied with a metal alloy with a high melting point such as cast iron, steel, superalloy.
  • the invention also relates to the use of a device as defined above, to recover after casting all the solidified metal and all the dross in the upper portion of its hollow internal part.
  • FIG. 1 The casting installation of FIG. 1 includes a sand mold 1 held on a mold support plate 2, an intermediate wear device 3 terminates a supply tube 5, embedded in a pouring nose of an oven.
  • the intermediate wear part 3 is applied to the upward casting under low pressure of a superalloy, this alloy being identical to those described in the French patent of the Applicant FR-B-2,534,167.
  • the invention also applies for ascending low pressure casting of cast iron (gray cast iron or ductile cast iron) or steel.
  • the supply tube 5 of refractory material, leading the liquid metal to the mold, is embedded in the nose 4 in adobe.
  • the junction between the supply tube 5 and the mold 1 is carried out using the intermediate wear device 3.
  • the upper face of the pouring nose 4 is flat and horizontal. It carries the intermediate device 3.
  • the intermediate device 3 comprises a ring 7 with a base in its lower part placed on the casting nose 4, said base covering the casting nose 4; moreover it comprises a refractory liner 8 made of rammed earth such as a basic magnesium aluminous, of the same internal and external diameter as the tube 5 so as to extend the latter.
  • the junction between the tube 5 and the sleeve 8 is obtained by a seal bead 9.
  • the intermediate device 3 crushes the seal 9 during its positioning.
  • the joint 9 is made of adobe.
  • the ring 7 Due to its base, the ring 7 has a smaller diameter at its upper part than at its lower part.
  • the ring 7 is made of cast refractory steel. Then the intermediate device is steamed to harden the rammed earth 18 between the ring 7 and the sleeve 8.
  • a seal 10 flat, flexible, annular and made of refractory material is placed at the top of the intermediate wear device.
  • the seal 10 as described for example in French patent FR-B-2 295 808 in the name of the Applicant, provides sealing with the mold 1.
  • the flexibility of the seal 10 allows it to hold by pressure and without coating. This seal is tightened on its upper face by the mold 1 and on its lower face by the ring 7 and the sleeve 8.
  • the upper and lower faces of the intermediate device 3 are each contained in a plane parallel to the lower face of the mold 1. Thanks to this geometry, the risk of leaks is eliminated because the mold presses uniformly and cannot press so stronger on one side which would cause a leak. Sealing is also obtained by a good surface condition of the intermediate device which, being inexpensive and removable, is changed frequently at the first risk of leakage.
  • the intermediate wear device is housed inside the opening 11 of the mold support plate 2 which allows the centering of the mold 1 and the arrival of the liquid metal in the well 12 opening into the lower part of the blind mold 1.
  • the sand mold 1 is held by means of a jack 13 directed downwards and whose piston rod 14 carries a support plate 15 hinged at its lower end.
  • the liquid metal rises from the tube 5 in the intermediate device 3, then in the mold 1.
  • the metal in the mold solidifies to form the pieces, this solidification starts from the top and stops at a level below the mold 1, this level is represented by the dashed line 6, below this level the metal remains liquid after casting and returns to the furnace.
  • the traces of solidified metal are all found at the level of the device 3 which undergoes the first thermal shocks which solidify the metal. So the tube 5, which does not retain metal after casting, does not need to be cleaned.
  • the intermediate device 3 wears quickly and is removable to be changed at a more sustained frequency than the refractory tube 5. This device 3 is changed frequently. The change is quick because it is not compulsory to cool the oven completely. However, it is necessary that the tube 5 is cold.
  • the refractory sleeve 8 is of a hollow cylindrical shape, the internal wall of the cylinder being of a constant diameter over the height.
  • the external wall of the sleeve 8 cooperates with the hollow cylindrical internal wall of the ring 7 by means of a grouted concrete 18.
  • the height of the sleeve 8 is identical to the height of the ring 7.
  • Notches 17 are provided in the base 16 of the ring 7 to allow the passage of the fixing screws of the intermediate device according to the invention.
  • the intermediate wear device 3 can be placed on the upper face of a pouring channel comprising heating means (see patent FR-A-2,532,866 in the name of the Applicant).
  • Said device 3 can also be used in an installation for the low pressure casting of molded parts from a ladle in a mold, under the driving pressure of a gas, by feeding the mold from bottom to top, the differential pressure being subjected, on the side of the pocket, to a pressure different from that which prevails on the side of the mold.
  • This use of the device according to the invention reduces the maintenance costs of such an installation already patented in France by the Applicant under the number FR-B-2 556 996.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Ceramic Products (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP91470021A 1990-08-27 1991-08-14 Dispositif intermédiaire pour la coulée de pièces moulées Expired - Lifetime EP0477119B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010798A FR2666036A1 (fr) 1990-08-27 1990-08-27 Dispositif intermediaire pour la coulee de pieces moulees.
FR9010798 1990-08-27

Publications (2)

Publication Number Publication Date
EP0477119A1 EP0477119A1 (fr) 1992-03-25
EP0477119B1 true EP0477119B1 (fr) 1995-08-02

Family

ID=9399949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91470021A Expired - Lifetime EP0477119B1 (fr) 1990-08-27 1991-08-14 Dispositif intermédiaire pour la coulée de pièces moulées

Country Status (18)

Country Link
US (1) US5184665A (cs)
EP (1) EP0477119B1 (cs)
JP (1) JP2611067B2 (cs)
AT (1) ATE125739T1 (cs)
BR (1) BR9103668A (cs)
CA (1) CA2049816C (cs)
CZ (1) CZ290725B6 (cs)
DE (1) DE69111729T2 (cs)
DK (1) DK0477119T3 (cs)
ES (1) ES2069512T3 (cs)
FI (1) FI96100C (cs)
FR (1) FR2666036A1 (cs)
GR (1) GR3017024T3 (cs)
HU (1) HU208930B (cs)
MX (1) MX9100815A (cs)
NO (1) NO179035C (cs)
PL (1) PL169288B1 (cs)
RU (1) RU2074052C1 (cs)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3420263B2 (ja) * 1992-09-02 2003-06-23 黒崎播磨株式会社 連続鋳造用ノズルの支持構造
US6431785B1 (en) 2000-06-05 2002-08-13 Wec Co. Direct pin quick coupler
DE102005009669A1 (de) * 2005-02-28 2006-08-31 Bühler Druckguss AG Giesskammer
RU2330891C2 (ru) * 2006-09-19 2008-08-10 Открытое акционерное общество "Оскольский электрометаллургический комбинат" Сортовой прокат круглый из низкоуглеродистой высокопластичной стали для холодной объемной штамповки
CN107096903B (zh) * 2017-04-26 2019-10-22 哈尔滨工业大学 反重力铸造升液管定位机构
CN108918314B (zh) * 2018-08-17 2021-03-16 西南交通大学 一种能够模拟沙粒及高温复杂环境的冲击磨损试验装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852822A (en) * 1955-08-12 1958-09-23 Griffin Wheel Co Vacuum seal for pressure pouring apparatus
BE557897A (cs) * 1957-06-03 1957-06-15
DE1156942B (de) * 1962-06-12 1963-11-07 Alcan Aluminiumwerke Steigrohr fuer den Anschluss der Kokillen beim Niederdruckgiessverfahren
FR2289279A1 (fr) * 1974-11-04 1976-05-28 Activite Atom Avance Installation de coulee rapide basse pression
US4133370A (en) * 1974-12-24 1979-01-09 Pont-A-Mousson S.A. Method and apparatus for low-pressure casting in a sand mould
FR2378591A1 (fr) * 1977-01-28 1978-08-25 Buscher Kg Conduit elevateur pour la coulee de metaux sous la pression d'un gaz
FR2532866B1 (fr) * 1982-09-13 1985-06-07 Pont A Mousson Chenal de coulee chauffe par induction
FR2534167B1 (fr) * 1982-10-11 1985-06-07 Pont A Mousson Procede de fabrication en fonderie de pieces moulees en alliages metalliques oxydables
FR2556996B1 (fr) * 1983-12-26 1988-03-11 Pont A Mousson Procede d'alimentation de moules de fonderie en alliages metalliques sous pression differentielle controlee
FR2559407B1 (fr) * 1984-02-15 1986-09-05 Pont A Mousson Procede de moulage en fonderie et moule pour la coulee de precision sous basse pression, avec modele gazeifiable et moule en sable sans liant
JPS623859A (ja) * 1985-06-28 1987-01-09 Toyota Motor Corp スト−クと金型間のシ−ル方法

Also Published As

Publication number Publication date
BR9103668A (pt) 1992-05-19
HUT60944A (en) 1992-11-30
HU208930B (en) 1994-02-28
NO913306D0 (no) 1991-08-23
FI96100B (fi) 1996-01-31
CS263791A3 (en) 1992-03-18
HU912587D0 (en) 1992-01-28
CZ290725B6 (cs) 2002-10-16
CA2049816A1 (fr) 1992-02-28
DE69111729T2 (de) 1996-01-18
NO179035C (no) 1996-07-24
GR3017024T3 (en) 1995-11-30
RU2074052C1 (ru) 1997-02-27
ATE125739T1 (de) 1995-08-15
DE69111729D1 (de) 1995-09-07
ES2069512T3 (es) 1995-11-16
FI96100C (fi) 1996-05-10
NO179035B (no) 1996-04-15
PL291507A1 (en) 1992-04-06
PL169288B1 (pl) 1996-06-28
US5184665A (en) 1993-02-09
FR2666036A1 (fr) 1992-02-28
DK0477119T3 (da) 1995-12-27
EP0477119A1 (fr) 1992-03-25
FI913994L (fi) 1992-02-28
NO913306L (no) 1992-02-28
FI913994A0 (fi) 1991-08-23
JP2611067B2 (ja) 1997-05-21
ES2069512T1 (es) 1995-05-16
MX9100815A (es) 1992-04-01
FR2666036B1 (cs) 1994-12-16
CA2049816C (fr) 1996-09-10
JPH0732123A (ja) 1995-02-03

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