EP0657236B1 - Molten metal pouring pot with induction heater - Google Patents

Molten metal pouring pot with induction heater Download PDF

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Publication number
EP0657236B1
EP0657236B1 EP94119315A EP94119315A EP0657236B1 EP 0657236 B1 EP0657236 B1 EP 0657236B1 EP 94119315 A EP94119315 A EP 94119315A EP 94119315 A EP94119315 A EP 94119315A EP 0657236 B1 EP0657236 B1 EP 0657236B1
Authority
EP
European Patent Office
Prior art keywords
molten metal
pouring pot
induction heater
metal pouring
pot
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
EP94119315A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0657236A1 (en
Inventor
Yasuyuki C/O Fuji Electric Co. Ltd. Ikeda
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Publication of EP0657236A1 publication Critical patent/EP0657236A1/en
Application granted granted Critical
Publication of EP0657236B1 publication Critical patent/EP0657236B1/en
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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means

Definitions

  • the present invention relates to a molten metal pouring pot used when molten metal of conductive metal such as cast iron received from a melting furnace or the like into the molten metal pouring pot is poured into molds or the like, and particularly to a molten metal pouring pot with an induction heater.
  • a molten metal pouring pot is directed to a vessel for storing, carrying and pouring high-temperature molten metal.
  • the housing of the molten metal pouring pot is constituted by a structural steel plate in order to support the weight of the molten metal, and the inner surface thereof is covered with a refractory material so as to be proof against the heat of the molten metal.
  • a molten metal outlet is formed at a place near an upper portion of the molten metal pouring pot so as to facilitate pouring of the molten metal into molds.
  • the metal which is molten in a melting furnace is put into a molten metal pouring pot, and then carried by a carrying means such as a crane, a hoist or the like to a place where molds are prepared. At that place, the molten metal is poured into a plurality of molds out of the molten metal pouring pot. Generally, about 10 to 40 molds are be filled at one time with molten metal stored in one molten metal pouring pot. It takes 10 to 30 minutes from reception of molten metal into a molten metal pouring pot from a melting furnace till completion of pouring of the molten metal into molds.
  • the work of pouring of the molten metal is brought into an end when the temperature of the molten metal becomes lower than the lowest temperature required for casting, even if the molten metal still remains in the molten metal pouring pot.
  • the molten metal remaining in the molten metal pouring pot must be returned into the melting furnace to raise the temperature, and then put into the molten metal pouring pot again so as to be poured into molds. This is a vain work.
  • a conventional molten metal pouring pot with an induction heater for compensating for the temperature drop of molten metal there is a conventional molten metal pouring pot with an induction heater for compensating for the temperature drop of molten metal.
  • Fig. 7 is a front view of a conventional example 1
  • Fig. 8 is a front view of a conventional example 2.
  • Fig. 7 shows an ordinary molten metal pouring pot 71
  • Fig. 8 shows a ladle-type molten metal pouring pot 81.
  • the molten metal pouring pot 71 has a hanger ear 74 and a housing 72 the inner surface of which is covered with a refractory material 73.
  • Molten metal 1 is stored in the molten metal pouring pot 71 and comes out from a molten metal outlet 75 when the molten metal pouring pot 71 is tilted.
  • a groove-type induction heater 76 is provided in a bottom portion of the molten metal pouring pot 71 to thereby compensate for the temperature drop of the molten metal 1.
  • the molten metal pouring pot 81 has a hanger ear 84 and a housing 82 the inner surface of which is covered with a refractory material 83.
  • Molten metal 1 is stored in the molten metal pouring pot 81 and comes out from a molten metal outlet 85 when the molten metal pouring pot 81 is tilted.
  • a crucible-like induction heater 86 is provided in a bottom portion of the molten metal pouring pot 71 to thereby compensate for the temperature drop of the molten metal 1.
  • an apparatus for pouring molten metal comprising a tiltable molten metal pouring pot and an induction heater wherein said induction heater is pivotally mounted to the margin of the open end of said pouring pot so as to be opposite through a gap to any molten metal stored in said molten metal pouring pot.
  • a planar induction coil of the induction heater which is independently separated from the molten metal pouring pot is disposed so as to be opposite through a gap to molten metal stored in the molten metal pouring pot through a gap, and the molten metal pouring pot and the induction heater are shaped and disposed so that the inner circumference of the molten metal pouring pot and the outer circumference of the induction heater do not interfere with each other when the molten metal pouring pot is tilted.
  • the housing of the molten metal pouring pot is constituted by a non-magnetic material.
  • a yoke may be disposed on the back surface of the induction coil of the induction heater.
  • the induction heater may be driven by a commercial frequency.
  • the induction heater may have an elevator movable in the vertical direction.
  • the induction heater is independently separated from the molten metal pouring pot, it is not necessary to provide an induction heater for every molten metal pouring pot, and it is not required to combine the induction heater with the molten metal pouring pot.
  • the planar induction heater is disposed so as to be opposite through a gap to the molten metal of the molten metal pouring pot, the molten metal is heated so that the temperature drop thereof can be compensated for, and at the same time the refractory material of the induction heater has a long life.
  • the inner circumference of the molten metal pouring pot and the outer circumference of the induction heater do not interfere with each other when the molten metal pouring pot is tilted, it is possible to proceed the tilting without any fear that the induction heater hits the molten metal pouring pot even if the molten metal pouring pot is tilted so as to further pour the molten metal into molds.
  • the housing of the molten metal pouring pot is constituted by a nonmagnetic material, the interlinkage of magnetic flux with the molten metal is not prevented, and the housing is not heated.
  • the yoke may increase the magnetic flux density, and facilitates the interlinkage of the magnetic flux with the molten metal.
  • the induction heater is driven by a commercial frequency it has a superior electrical efficiency.
  • the molten metal pouring pot can be moved horizontally to a place under the induction heater which has been raised once by the elevator.
  • the center of tilting is disposed near the molten metal outlet, the surface of the molten metal, the position of which depends on the molten metal outlet, is always constant near the center of tilting even if continuous pouring decreases the molten metal. Accordingly, even if the height of the center of tilting and the height of the induction heater are kept constant relative to the floor, induction heating is continued properly while the gap between the molten metal and the induction heater is always kept constant.
  • the molten metal pouring pot has its tilting center in the neighborhood of the molten metal outlet, the trace of the flow of the molten metal dropping from the molten metal outlet naturally and quietly is rarely changed. Accordingly, even if continuous pouring decreases the molten metal, the positions of molds and so on relative to the floor can be left constant without adjustment.
  • Fig. 1 is a front view showing a molten metal pouring pot with an induction heater according to a first embodiment. Parts referenced by the same numeral in the conventional examples and the drawings have almost the same function, and will not always be described repeatedly.
  • a planar induction coil 32 of an induction heater 31 which is independently separate from the molten metal pouring pot 12 is disposed so as to be opposite through a gap to the molten metal 1 stored in the molten metal pouring pot 12.
  • the molten metal pouring pot 12 and the induction heater 31 are shaped and located so that the inner circumference of the molten metal pouring pot 12 and the outer circumference of the induction heater 31 do not interfere with each other when the molten metal pouring pot 12 is tilted.
  • the housing 13 of the molten metal pouring pot 12 is constituted by a nonmagnetic material, and a yoke 33 is disposed on the back surface of the induction coil 32 of the induction heater 31.
  • the induction heater 31 is driven by a commercial frequency (50 or 60 Hz).
  • the induction heater 31 has an elevator 34 movable in the vertical direction.
  • the molten metal pouring pot 12 is moved by a crane or the like while a not-shown hanger ear hangs the handle 11.
  • the molten metal pouring pot 12 is then put on a fixed roller conveyor 16a, and tilted by a tiltable roller conveyor 16b.
  • the center of tilting is located on a pin 17 near the molten metal outlet 15, and the pin 17 of the molten metal pouring pot 12 which has moved there is fitted into a fixed hook 18.
  • Fig. 2 is a front view showing a molten metal pouring pot with an induction heater according to a second embodiment
  • the molten metal pouring pot shown in Fig. 2 has the same structure as that in Fig. 1, except for the molten metal pouring pot is a ladle-type molten metal pouring pot 22.
  • the molten metal pouring pot 22 is constituted by a handle 11, a nonmagnetic housing 23, a refractory material 14, a molten metal outlet 15, roller conveyors 16a and 16b, a pin 17 near the molten metal outlet 15, and a hook 18.
  • a planar induction coil 32 of an induction heater 31 is disposed so as to be opposite to molten metal 1.
  • the molten metal pouring pot 22 and the induction heater 31 are shaped and located so that the inner circumference of the molten metal pouring pot 22 and the outer circumference of the induction heater 31 do not interfere with each other when the molten metal pouring pot 22 is tilted.
  • This embodiment of Fig. 2 is similar to that of Fig. 1 in the point that the induction heater 31 has a yoke 33 and an elevator 34 and it is driven by a commercial frequency.
  • the induction heater 31 is independently separated from the molten metal pouring pot 12 or 22, it is not necessary to provide such an induction heater 31 for every molten metal pouring pot, and it is not required to perform a work to combine the induction heater 31 with the molten metal pouring pot 12 or 22.
  • the planar induction heater 31 is disposed so as to be opposite through a gap to the molten metal 1 of the molten metal pouring pot 12 or 22, the molten metal 1 is heated so that the temperature drop thereof can be compensated for, and at the same time the refractory material 14 of the induction heater 31 has a long life.
  • the inner circumference of the molten metal pouring pot 12 or 22 and the outer circumference of the induction heater 31 do not interfere with each other when the molten metal pouring pot 12 or 22 is tilted, it is possible to proceed the tilting without any fear that the induction heater 31 hits the molten metal pouring pot even if the molten metal pouring pot 12 or 22 is tilted to continue the pouring of the molten metal 1 into molds 19.
  • the housing 13 or 23 of the molten metal pouring pot 12 or 22 is constituted by a nonmagnetic material, magnetic flux is not prevented from interlinking with the molten metal 1, and the housing 13 and 23 is not heated.
  • the yoke 33 increases magnetic flux density, and facilitates interlinkage of the magnetic flux with the molten metal 1.
  • the induction heater 31 driven by a commercial frequency has a superior electrical efficiency. When the height from the molten metal 1 to the induction heater 31 is smaller than the height from the molten metal 1 to the upper edge of the molten metal pouring pot 12 or 22, the molten metal pouring pot 12 or 22 can be moved horizontally to a place under the induction heater 31 which has been raised once by the elevator 34.
  • the center of tilting is disposed near the molten metal outlet 15, the surface of the molten metal 1 the position of which depends on the molten metal outlet 15 is always constant near the center of tilting even if continuous pouring decreases the molten metal 1. Accordingly, even if the height of the center of tilting and the height of the induction heater 31 are kept constant to the floor, induction heating is properly continued as the gap between the molten metal 1 and the induction heater 31 is always kept constant. In addition, since the molten metal pouring pot 12 or 22 is tilted centering the neighborhood of the molten metal outlet 15, the trace of the flow of the molten metal dropping from the molten metal outlet 15 naturally and quietly is rarely changed. Accordingly, even if continuous pouring decreases the molten metal, the positions of the molds 19 and so on relative to the floor can be left constant without adjustment.
  • Fig. 3 is a longitudinal sectional view showing an induction heater in Fig. 1 or 2 and Fig. 4 is a plan view partially illustrating the section taken on line A-A in Fig. 3.
  • the induction coil 32 has two planar stages of spirals, and the radial yoke 33 is disposed on the back surface (upper surface) thereof and in the horizontal direction.
  • An insulator 35 and an adiabator 36 are successively laid on the surfaces of the induction coil 32 and the yoke 33.
  • a refractory castable 37 is given to the surfaces and outer circumferences of the yoke 33 and the adiabator 36, and an outer frame 38 covers the front surface, the outer circumferential surface and the back surface of the castable 37 other than part of the center portion of the surface.
  • the insulator 35 is suspended by a suspension hook 39 elongated downward from the back of the outer frame 38, and the castable 37 is hung by a locking metal fitting 40.
  • Legs 41 for the elevator 34 are fixed to the back of the outer frame 38.
  • a terminal 42 of the water-cooled induction coil 32 is extracted from the back of the outer frame 38.
  • a cooling pipe 43 is brought into contact with the outer frame 38 so that cooling water is supplied from the outside to cool the induction heater 31.
  • Fig. 5 is a distribution diagram showing magnetic flux in Fig. 2.
  • the illustration of the magnetic flux in the center portion is omitted in the drawing because the density of the magnetic flux is so high at that place.
  • the interlinkage of the magnetic flux with the molten metal 1 can be sen clearly. It was confirmed by experiment that electrical efficiency is better at a commercial frequency of 50 or 60 Hz than at an intermediate frequency in a range of from 150 Hz to 10 kHz.
  • Fig. 6 is a plan view showing an induction coil according to a third embodiment.
  • An induction coil 60 shown in Fig. 6 is shaped into a planar square, and the planar spiral induction coil 32 may be replaced by the planar square induction coil 60.
  • the induction heater is independently separated from the molten metal pouring pot. Accordingly, there is an effect that is not necessary to provide an induction heater for every molten metal pouring pot, and it is not required to combine the induction heater with the molten metal pouring pot.
  • the planar induction heater is disposed so as to be opposite through a gap to molten metal of the molten metal pouring pot, there is an effect that the molten metal is heated so that the temperature drop thereof can be compensated for, and at the same time the refractory material of the induction heater has a long life.
  • a housing of the molten metal pouring pot may be constituted by a nonmagnetic material, there is an effect that magnetic flux is not prevented from interlinking with the molten metal, and the housing is not heated.
  • a yoke increases magnetic flux density, and facilitates the interlinkage of magnetic flux with the molten metal. Still further, there may be obtained an effect that the induction heater driven by a commercial frequency has a superior electrical efficiency.
  • the molten metal pouring pot can be moved horizontally to a place under the induction heater which has been raised once by an elevator.
  • the center of tilting is disposed near a molten metal outlet, there is an effect that the surface of the molten metal the position of which depends on the molten metal outlet is always constant near the center of tilting, so that even if the height of the center of tilting and the height of the induction heater are kept constant to the floor, induction heating is continued as the gap between the molten metal and the induction heater is always kept constant and proper.
  • the molten metal pouring pot has its tilting center in the neighborhood of the molten metal outlet, there is an effect that the trace of the flow of the molten metal dropping from the molten metal outlet naturally and quietly is rarely changed, so that even if continuous pouring decreases the molten metal, the positions of molds and so on relative to the floor can be left constant without adjustment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • General Induction Heating (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP94119315A 1993-12-10 1994-12-07 Molten metal pouring pot with induction heater Expired - Lifetime EP0657236B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP309955/93 1993-12-10
JP05309955A JP3094761B2 (ja) 1993-12-10 1993-12-10 誘導加熱装置を備える注湯ポット
JP30995593 1993-12-10

Publications (2)

Publication Number Publication Date
EP0657236A1 EP0657236A1 (en) 1995-06-14
EP0657236B1 true EP0657236B1 (en) 2000-05-10

Family

ID=17999370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119315A Expired - Lifetime EP0657236B1 (en) 1993-12-10 1994-12-07 Molten metal pouring pot with induction heater

Country Status (6)

Country Link
EP (1) EP0657236B1 (zh)
JP (1) JP3094761B2 (zh)
CN (1) CN1056326C (zh)
DE (1) DE69424380T2 (zh)
MY (1) MY111808A (zh)
TW (1) TW272953B (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2850282B1 (fr) 2003-01-27 2007-04-06 Jerome Asius Implant injectable a base de ceramique pour le comblement de rides, depressions cutanees et cicatrices, et sa preparation
CN100402193C (zh) * 2004-05-18 2008-07-16 深圳派瑞科冶金材料有限公司 液态金属容器底部加热装置及应用
TWI386262B (zh) 2004-09-01 2013-02-21 Commw Scient Ind Res Org 合金鑄造裝置
JP2016107333A (ja) * 2014-11-28 2016-06-20 白岩　慎一郎 非鉄金属溶解炉、非鉄金属溶解方法、及び非鉄金属溶解設備
CN107511474B (zh) * 2017-08-04 2019-12-10 福建圣力智能工业科技股份有限公司 一种连铸机用加热机构
CN109175340A (zh) * 2018-11-08 2019-01-11 山东杰创机械有限公司 一种浇注定位浇包

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH439603A (de) * 1966-05-25 1967-07-15 Olsson Ag Erik Giessgefäss für metallische Schmelzen
SE415535B (sv) * 1978-06-13 1980-10-13 Asea Ab Anordning vid kontinuerlig gjutning, sasom strenggjutning
DE2906634A1 (de) * 1979-02-09 1980-08-21 Bbc Brown Boveri & Cie Induktionsofen
JPS5756143A (en) * 1980-09-22 1982-04-03 Kawasaki Steel Corp Method for heating molten steel in tandish in continuous casting process
GB2226261B (en) * 1988-12-20 1992-10-14 Rolls Royce Plc Apparatus for pouring molten metals
GB8829689D0 (en) * 1988-12-20 1989-02-15 Rolls Royce Plc Clean melting of superalloys

Also Published As

Publication number Publication date
CN1056326C (zh) 2000-09-13
MY111808A (en) 2001-01-31
TW272953B (zh) 1996-03-21
DE69424380D1 (de) 2000-06-15
EP0657236A1 (en) 1995-06-14
CN1109807A (zh) 1995-10-11
JP3094761B2 (ja) 2000-10-03
JPH07155934A (ja) 1995-06-20
DE69424380T2 (de) 2000-08-24

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