EP1477253A1 - System zum Abgiessen vom Metallschmelze - Google Patents

System zum Abgiessen vom Metallschmelze Download PDF

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Publication number
EP1477253A1
EP1477253A1 EP03101083A EP03101083A EP1477253A1 EP 1477253 A1 EP1477253 A1 EP 1477253A1 EP 03101083 A EP03101083 A EP 03101083A EP 03101083 A EP03101083 A EP 03101083A EP 1477253 A1 EP1477253 A1 EP 1477253A1
Authority
EP
European Patent Office
Prior art keywords
container
molten material
moving
wall
pouring
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.)
Granted
Application number
EP03101083A
Other languages
English (en)
French (fr)
Other versions
EP1477253B1 (de
Inventor
Jacques Vervier
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.)
Maquet SAS
Original Assignee
ALM 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
Priority to ES03101083T priority Critical patent/ES2246458T3/es
Application filed by ALM SA filed Critical ALM SA
Priority to DE60301056T priority patent/DE60301056T2/de
Priority to AT03101083T priority patent/ATE299768T1/de
Priority to EP03101083A priority patent/EP1477253B1/de
Priority to AU2004230277A priority patent/AU2004230277A1/en
Priority to PCT/EP2004/050531 priority patent/WO2004091831A1/en
Priority to CA002522000A priority patent/CA2522000A1/en
Publication of EP1477253A1 publication Critical patent/EP1477253A1/de
Application granted granted Critical
Publication of EP1477253B1 publication Critical patent/EP1477253B1/de
Priority to US11/253,034 priority patent/US20060113058A1/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
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • 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

Definitions

  • the invention relates to a system for tapping and pouring high temperature molten material, comprising a first container and a second container capable of being introduced into the first container.
  • One way to perform this operation is to make use of a ladle capable of being plunged into a bath of molten material, and further capable of taking out a particular amount of said molten material, transporting it for instance on top of a mould to be filled and pouring the molten material into the mould, either by tilting the ladle and by letting the molten material going through a spout or by opening a valve and letting the molten material to drain away through said valve.
  • a system using the above principle is the "Hodler system", as illustrated in Fig. 219 of page 126 of "Technologie de la Fonderie en Moules Metalliques, Fonderie sous pression", Edition techniques des industries de la fonderie, Paris 1968.
  • a container is plunged into a crucible which contains molten metal. Said container is then filled up with molten metal. The container is then removed from the crucible by mechanical means and carried to a place above a mould or a channel leading to a mould. A valve located on the bottom of the mobile container is opened to let the liquid drain away towards the mould.
  • the system is characterized in that the second container is arranged inside the first container and, in operation, remains inside and in contact with the first container, the first and second container share a common element comprising an exit for letting the molten material flowing out of the system, and the system comprises means for moving the second container in respect to the common element to and fro a filling position for filling the second container with molten material present in the first container and a pouring position for pouring molten material from the second container through the exit.
  • the system according to the invention is such that, in operation, the first container is filled with molten material.
  • the second container is arranged inside the first container and executes in operation a movement inside the first container, i.e. the second container remains inside the first container, thus not causing dripping of molten material outside the system and causing less alteration of the molten material, for instance less oxidation and contamination of the molten metal.
  • This is a first advantage over the systems known in the prior art in which molten material often drips from the mobile container, which results in needless loss of material and safety problems.
  • This is the case of the "Hodler system” which also presents the propensity to cause important alteration to the molten material, due to the relatively long transportation time mainly outside the crucible.
  • the system according to the invention significantly improves this situation since the transportation of the molten material before pouring is simplified in a significant way.
  • a second advantage of the system according to the invention is that pouring can easily be controlled and stopped by reversing or stopping the movement of the second container without loss or risk of alteration of the molten material since the molten material which is not poured remains inside the second container and thus inside the first container.
  • a third advantage is that the system is very compact, since the second container does not leave the first container. It means, firstly, that the occupied area on the floor is smaller and, secondly, that the system is much cleaner since the elements of said system are concentrated in a relatively smaller volume, thus requiring less protecting means to constrain to a particular area the high temperatures, the heat radiation, the polluted atmosphere, the molten material ejection and the like.
  • a fourth advantage is that the heat remains subtantially inside the system up until the metal is actually poured, because no molten metal is transported outside the first container until it is poured.
  • the mobile container is transported away from the crucible in such a way as to lead to a larger loss of energy and to subject a larger area to safety hazard.
  • a fifth advantage of the system according to the invention is that only relatively small and simple movements are involved in the tapping and pouring operations since the second container remains inside the first container. No complex movement is required since the second container moves with respect to the common element and thus the movement is at least to some extent guided, i.e. for instance only a certain type or certain types of movement, such as a translation or a rotation of the second container with respect to the first container, are possible. Moreover, the system may be totally automatized without complex mechanisms thanks to its simplicity.
  • characteritics of the invention provide an at least partial solution to the mentioned problems of the prior art tapping and pouring systems, said problems being very specific to high-temperature molten materials. Indeed, the circumstances in which these systems are used are very particular, due to the extreme temperatures, the intense radiation, the polluted surrounding atmosphere, the molten metal ejections and so forth. Many normal material and devices cannot be used in these circumstances and any new improvement must be designed keeping in mind the specific context involved.
  • system according to the invention is simpler, more compact, cleaner, less expensive and easier to install and maintain but yet provides for greater accuracy in pouring amounts of molten material, surprising though it may seem.
  • the invention concerns a system (2) for tapping and pouring high-temperature molten material, for instance for tapping molten metal from a crucible (4) and pouring it into a mould.
  • Fig. 1a shows a schematic cross-section representation of an example of the system (2) according to the invention, in operation, while the second container (6) is entirely plunged into the first container bath (8).
  • the first container (4) or crucible contains indeed a bath (8) of molten material, for instance a molten metal, which communicates through a first channel (20) for instance with another crucible, although it will be clear for the person skilled in the art that such a communication channel (20) is neither essential nor compulsory to the invention.
  • a second channel (18) or hollow inner tube is located substantially inside the first container (4) and extends from above the level L B of the first container bath (8) to below the bottom of the first container (4), thus forming a inner wall (26), common to both the first container (4) and the second container (6).
  • Said second channel (18) may have a cylindrical shape and may be surrounded by the liquid bath (8).
  • a second container (6) is arranged inside, i.e. fit in, the first container (4) in such a way as, first, to be substantially in contact through a joint (22) or not with the wall (26), secondly, to extend around the second channel (18), for instance to form a cylindrical shape around said channel (18) if said channel (18) has a cylindrical shape, and, thirdly, to be capable of moving vertically only.
  • some means for lifting the second container (6) are provided in order to produce the vertical movement of the second container (6), i.e. in order to lift it and to lift it down.
  • a jack (16) is represented and controls the second container's (6) movement via some rods (14). Nonetheless, it will be clear for the person skilled in the art that some other means may be used without departing from the invention.
  • the term "inside" in “the second container (6) remains inside the first container (4)" must be understood broadly, i.e. it means that the second container (6) stays in operation in or slightly above the first container (4) in such a way as, on the one hand, the movement of the second container (6) when in operation can be operated by a relatively simple mechanism and, on the other hand, the second container (6) stays in the vicinity of the first container (4), thus causing a relatively small heat loss.
  • Fig. 1b shows the system (2) of Fig. 1a while the second container liquid level is slightly above the overflow limit, i.e. the level L A .
  • Fig. 1b is a schematic representation of the system (2) of Fig. 1a at an instant just before some liquid of the second container liquid bath (10) goes through the aperture (12).
  • Fig. 1a shows the second container (6) at the filling position
  • Fig. 1b shows said second container (6) at the pouring position, just before the pouring step actually occurs.
  • Fig. 1c shows the system (2) of Fig. 1a while the second container liquid level is above the level L A and while the exceeding molten material (24) is flowing over the brim of the aperture (12). It will be clear from the person skilled in the art that there may be no aperture (10) and that the exceeding molten material (24) may flow through an overflow outlet system, over the brim of the top of the second channel (18) or via any means of letting the liquid flow without departing from the invention.
  • Fig. 1d shows a top view of the system (2) of Fig. 1c. Both containers (4, 6) are shown and the exceeding molten material (24) is also shown when falling with gravity through the second channel (18).
  • the dashed line A represents the plan according to which the cross-section of Fig. 1c is made.
  • the means (16) for lifting the second container (6) is not shown in Fig. 1d in order to keep said figure as clear as possible.
  • the successive steps shown in the Fig. 1a, 1b and 1c illustrate an example of a way of operating the system (2) according to the invention in order to tap a particular amount or volume of molten material from the bath (8), lift it in a second container (6) and pour it through an aperture (12) in a channel leading for instance to a mould.
  • the volume it is capable to hold is reduced and depends on said particular level.
  • the overflowing molten material (24) that will may be poured into the mould depends on the level to which the second container (6) is lifted.
  • the system (2) may be used for tapping and pouring different volumes or quantities without having to alter the components of said system (2).
  • the molten material that is poured into e.g. a mould may consequently be controlled by the level to which the second container (6) is lifted.
  • means for stopping the means (16) for lifting the second container (6) may be provided.
  • a jack (16) with a carriage stop (32) may be used.
  • Said means for stopping the lifting movement for instance an adjustable carriage stop (32), may be such that it is possible to adapt said means in order to change the volume of liquid to be poured.
  • an adjustable carriage stop 32
  • this is an important advantage over the tapping and pouring systems as known in the art.
  • One notable advantage of the embodiment of the system (2) shown in Fig. 1a, 1b and 1c is that, during the operation, the molten material stays, at least for some time heated by the molten material surrounding the inner tube (18), thus creating less heat and less contamination.
  • Fig. 2a shows a schematic cross-section representation of an example of the system (2) according to the invention, while not in operation, i.e. without any liquid in the containers (4, 6).
  • a first maximum volume V 1 is shown, this is the volume that can be contained by the second container (6) while fit into the first container (4).
  • the volume V 1 is delimited by the wall (26), the walls of the first container (6) and the dashed line that would be the level of liquid in the second container (6) if it was full to the brim, for instance at the filling position.
  • FIG. 2b shows the second container (6) of the system (2) of Fig. 2a, while said second container (6) is completely separated from the first container (4), but, nonetheless, in the same orientation and configuration as the orientation and configuration shown in Fig. 2a.
  • the second maximum volume V 2 is represented and is the volume that can be contained by the second container (6) while completely separated from the first container (4).
  • the second maximum volume V 2 is different from the first maximum volume V 1 .
  • the volume V 2 is smaller than volume V 1 and the volume V 1 is larger than 0.
  • the difference of volume highlighted here is a characteristic of a class of systems (2) according to the invention, the class of systems (2) in which, in operation, the second container (6) only translates with respect to the common element, i.e. the wall (26). In operation, during the process of lifting the second container (6) out of the bath (8), from a certain moment on, the volume that can be contained by the second container (6) is not anymore equal to V 1 and decreases towards V 2 .
  • the third volume V 3 is defined as the maximum volume of molten material which can be contained into the second container (6) while the means (16) for moving said container bumps into the adjustable carriage stop (32) when said carriage stop (32) is at its highest position.
  • the fourth volume V 4 is shown on Fig. 1c and 4 and is defined as the maximum volume of molten material which can be contained into the second container (6) while the means (16) for moving said container bumps into the adjustable carriage stop (32), said carriage stop (32) being in a particular intermediate position.
  • the difference between the first maximum volume V 1 and the third volume V 3 and the difference between said first maximum volume V 1 and the fourth volume V 4 represent, for a particular system according to the invention, the maximum volume of exceeding molten material that may exit the containers, respectively while the carriage stop (32) is at its highest position and while the carriage stop (32) is at a particular intermediate position.
  • the accurate exceeding volumes that may exit the containers as explained, one must subtract from these differences of volume the possible small quantity of molten material which may leak through the joint (22), said quantity being controlled and independent of the level of molten material L B of the first container (4).
  • the second container (6) shown in Fig. 2b is disassembled from the system (2) according to the invention. Indeed, as explained above, in operation, the system (2) according to the invention is such that the second container (6) is arranged inside the first container (4) and remains in it throughout the entire operation of tapping and pouring.
  • the second maximum volume V 2 is substantially equal to zero.
  • the exceeding molten material (24) flows through an exit in a third channel (28), which starts in an inner wall common to the first container (4) and to the second container (6), said exit being formed by a brim, an edge or a part of an edge of said wall, the means (16) for moving being then for moving the second container (6) up and down said wall.
  • a schematic cross-section representation of said system (2), in operation, is shown in Fig. 3a.
  • the second container liquid level is above the overflow limit and the exceeding molten material (24) is flowing through the third channel (28).
  • the second container (6) is fit into the first container (4) in such a way as to be substantially in contact via the joint (22) with said first container (4), to be capable of moving vertically in respect to the first container (4) and to be also capable of holding a bath of liquid (10).
  • the second container (6) has a shape which may be generated by the rotation of a "L" around an vertical axis, even though it will be clear for the person skilled in the art that the second container's (6) shape may be different without departing from the invention.
  • Fig. 3b shows a top view of the system of Fig. 3a.
  • the dashed line B represents the plan according to which the cross-section of Fig. 3a is made.
  • the means (16) for lifting the second container (6) is not shown in Fig. 1d in order to keep said figure as clear as possible.
  • One notable advantage of the embodiment of the system (2) shown in Fig. 3a is that the construction is simple, i.e. there is no need of installing an inner tube (18) in the first container (4).
  • the second container (6) executes a rotation with respect to a rotation axis linking both containers.
  • the rotation axis is the common element mentionned above.
  • the characteristic stating that the common element (26) comprises an exit must be understood by the following meaning: said exit may be formed in the common element (26) or located in the vicinity of said common element (26) with departing from the system (2) according to the invention.
  • Fig. 4 shows another embodiment of the system (2) according to the invention while the exit (12) is an aperture in the inner wall (26). This embodiment is very similar to the system (2) shown in Fig. 1a, 1b, 1c and 1d.
  • the high-temperature molten material in operation, is a molten metal, such as aluminium, tin, lead or any other metal or alloy of metals. It may also be a molten glass.
  • high-temperature molten material it must be understood that the concerned material has a melting point above about 0 Celsius degrees, although this meaning must not be considered as a limitation and the application of the system to molten material having a melting point below 0 Celsius degree must also be considered as being part of the invention.
  • the material is a metal or an alloy of metals having a melting point comprised between 0 Celsius degrees and 1000 Celsius degrees.
  • the alloy is, in a particular embodiment, an alloy of metals having a low melting point.
  • the molten material is a molten metal and the joint (22) is generally entirely plunged in the bath (8) at any time of the operation of tapping and pouring molten material.
  • the system (2) in operation, is such that the level L A is only slightly higher than the level L B . This slight difference between the level L A and the level L B guarantees that the difference between the pressure at the vicinity of the joint (22) in the second container (6) and the pressure at the vicinity of the joint (22) in the first container (4) stays relatively small, thus reducing the pressure on said joint (22) and the quantity of molten material leaking through said joint (22).
  • System (2) for tapping a high-temperature molten material, especially a molten metal, from a bath (8) and pouring it into a mould comprising a mobile container (6) capable of moving with respect to an element (26) in such a way as, on the one hand, said container (6) may be plunged into the bath (8) to take some liquid and, on the other hand, lift the container (6) above a particular level for forcing the liquid to fall down with gravity through an aperture (10) along the wall.
  • the system (2) does not imply high costs and allows to pour accurate volumes of molten material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
EP03101083A 2003-04-18 2003-04-18 System zum Abgiessen vom Metallschmelze Expired - Lifetime EP1477253B1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE60301056T DE60301056T2 (de) 2003-04-18 2003-04-18 System zum Abgiessen vom Metallschmelze
AT03101083T ATE299768T1 (de) 2003-04-18 2003-04-18 System zum abgiessen vom metallschmelze
EP03101083A EP1477253B1 (de) 2003-04-18 2003-04-18 System zum Abgiessen vom Metallschmelze
ES03101083T ES2246458T3 (es) 2003-04-18 2003-04-18 Sistema para extraer y verter material fundido.
AU2004230277A AU2004230277A1 (en) 2003-04-18 2004-04-15 Tapping and pouring system for molten metals
PCT/EP2004/050531 WO2004091831A1 (en) 2003-04-18 2004-04-15 Tapping and pouring system for molten metals
CA002522000A CA2522000A1 (en) 2003-04-18 2004-04-15 Tapping and pouring system for molten metals
US11/253,034 US20060113058A1 (en) 2003-04-18 2005-10-17 Tapping and pouring system for molten metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03101083A EP1477253B1 (de) 2003-04-18 2003-04-18 System zum Abgiessen vom Metallschmelze

Publications (2)

Publication Number Publication Date
EP1477253A1 true EP1477253A1 (de) 2004-11-17
EP1477253B1 EP1477253B1 (de) 2005-07-20

Family

ID=33016991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03101083A Expired - Lifetime EP1477253B1 (de) 2003-04-18 2003-04-18 System zum Abgiessen vom Metallschmelze

Country Status (8)

Country Link
US (1) US20060113058A1 (de)
EP (1) EP1477253B1 (de)
AT (1) ATE299768T1 (de)
AU (1) AU2004230277A1 (de)
CA (1) CA2522000A1 (de)
DE (1) DE60301056T2 (de)
ES (1) ES2246458T3 (de)
WO (1) WO2004091831A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027252A1 (de) * 2006-06-09 2007-12-13 Volkswagen Ag Vorrichtung und Verfahren zum Giessen von Schmelzen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1375520A (de) * 1973-08-31 1974-11-27
US4174190A (en) * 1977-06-30 1979-11-13 The United States Of America As Represented By The United States Department Of Energy Annular linear induction pump with an externally supported duct
JPH058017A (ja) * 1991-07-03 1993-01-19 Kubota Corp 溶湯搬送装置
JPH08117972A (ja) * 1994-10-19 1996-05-14 Hitachi Metals Ltd 鋳造用掛堰
GB2323804A (en) * 1997-03-31 1998-10-07 Ryobi Ltd Molten metal supply
JP2001239357A (ja) * 2000-02-29 2001-09-04 Aisin Seiki Co Ltd 給湯装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261060A (en) * 1963-09-05 1966-07-19 Winkel Machine Co Inc Precise pouring apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1375520A (de) * 1973-08-31 1974-11-27
US4174190A (en) * 1977-06-30 1979-11-13 The United States Of America As Represented By The United States Department Of Energy Annular linear induction pump with an externally supported duct
JPH058017A (ja) * 1991-07-03 1993-01-19 Kubota Corp 溶湯搬送装置
JPH08117972A (ja) * 1994-10-19 1996-05-14 Hitachi Metals Ltd 鋳造用掛堰
GB2323804A (en) * 1997-03-31 1998-10-07 Ryobi Ltd Molten metal supply
JP2001239357A (ja) * 2000-02-29 2001-09-04 Aisin Seiki Co Ltd 給湯装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 275 (M - 1418) 27 May 1993 (1993-05-27) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 26 1 July 2002 (2002-07-01) *

Also Published As

Publication number Publication date
ES2246458T3 (es) 2006-02-16
AU2004230277A1 (en) 2004-10-28
ATE299768T1 (de) 2005-08-15
US20060113058A1 (en) 2006-06-01
EP1477253B1 (de) 2005-07-20
CA2522000A1 (en) 2004-10-28
DE60301056T2 (de) 2006-06-01
WO2004091831A1 (en) 2004-10-28
DE60301056D1 (de) 2005-08-25

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