EP1299204A2 - Procede et dispositif de coulee ascendante a l'aide d'un moule pourvu d'un orifice de coulee place vers le bas et dote d'une fermeture coulissante - Google Patents

Procede et dispositif de coulee ascendante a l'aide d'un moule pourvu d'un orifice de coulee place vers le bas et dote d'une fermeture coulissante

Info

Publication number
EP1299204A2
EP1299204A2 EP01969359A EP01969359A EP1299204A2 EP 1299204 A2 EP1299204 A2 EP 1299204A2 EP 01969359 A EP01969359 A EP 01969359A EP 01969359 A EP01969359 A EP 01969359A EP 1299204 A2 EP1299204 A2 EP 1299204A2
Authority
EP
European Patent Office
Prior art keywords
opening
casting
riser pipe
passage
plate
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
EP01969359A
Other languages
German (de)
English (en)
Other versions
EP1299204B1 (fr
Inventor
Wolfgang Müller
Alexander Fischer
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.)
Hydro Aluminium Deutschland GmbH
Original Assignee
Hydro Aluminium Deutschland GmbH
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 Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Priority to DE20122418U priority Critical patent/DE20122418U1/de
Priority to SI200130352T priority patent/SI1299204T1/xx
Priority to DK01969359T priority patent/DK1299204T3/da
Publication of EP1299204A2 publication Critical patent/EP1299204A2/fr
Application granted granted Critical
Publication of EP1299204B1 publication Critical patent/EP1299204B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 invention relates to a method and a device for rising casting / low-pressure casting - in particular of light metal alloys - with a casting furnace at the bottom with a riser pipe and a mouth opening of the riser pipe and with a casting mold with a pouring opening at the bottom and with a slide closure for the sprue opening, which forms a passage, which assumes a substantially straight longitudinal course of in particular a constant cross section for casting.
  • rising pouring has the main advantage of a calm, controlled pouring process. This avoids the entry of air bubbles and the entry of oxidation skin, which is associated with any turbulence in the melt during casting.
  • core packages are used as casting molds, the detachment and entrainment of molding material in the gate and in the casting run can be avoided, which otherwise leads to a reduction in the quality of the castings.
  • a three-plate slide closure for steel casting vessels is known, which is intended to control the pouring of such vessels below.
  • a bottom plate, a slide plate and a lower plate are arranged in a cassette to be fitted under the bottom of such vessels from top to bottom, which have through-openings forming a flow channel.
  • the opening in the lower plate in the direction of movement of the slide plate is twice as large as the openings in the base plate and in the slide plate. The direction of flow of the melt is always falling in this slide closure.
  • the following invention is based on the object of further improving a method and a device of the type mentioned in order to accelerate the course of the method.
  • the solution lies in a process for increasing casting / low-pressure casting, in which two immediately adjacent opening sections of the passage channel are shifted against one another in the slide opening, after the casting, while the melt is still molten, transversely to the longitudinal course of the passage channel so that an overhead opening section is shifted against one another in the slide closure remains openly connected to the sprue opening without an undercut and an opening section located below remains openly connected to the mouth opening of the riser pipe, the opening sections being completely offset from one another, and the melt in the riser pipe is then lowered to below the mouth opening of the riser pipe, the lower opening section of the passage channel is emptied of melt.
  • a corresponding device is characterized in that the slide closure comprises two mutually displaceable plates, each having a passage opening, the plates for casting can be brought into overlap with their passage openings and the plates for blocking can be displaced relative to one another in such a way that the passage opening in the upper plate is openly connected to the sprue opening without an undercut and the passage opening in the lower plate is openly connected to the riser pipe, while the passage openings are completely offset from one another.
  • the melt contained in the through opening of the upper plate in a through hole remains connected to the casting or the pouring opening of the mold in such a way that it can be easily removed from the top after solidification and that in the Through opening of the lower plate melt contained in a through hole can flow back into the riser.
  • the casting mold can be lifted off the casting table without waiting for the solidification process even in the sprue and another casting mold with its slide Closure can be placed on the riser pipe.
  • a plurality of casting molds must therefore be used. After removal from the mold, the lifted-off mold is ready for operation again by simply opening the slide lock without further measures.
  • the mutually displaceable plates can be moved relative to one another in a linear movement or in a rotating movement.
  • the method is carried out in such a way that the melt in the riser pipe is only slightly lowered below the mouth opening of the riser pipe after the slide closure has been closed, in order to reduce the entry of air to a minimum. It is particularly favorable here to apply protective gas to the riser when the melt is slightly lowered between the individual casting processes, so that the oxidation at the melt level in the riser is reduced.
  • the casting mold when the casting mold is placed on the riser pipe, the latter behaves elastically and resiliently with the part forming the mouth opening.
  • the casting mold is placed on the riser pipe in such a way that a defined contact pressure is established between the slide closure and the part of the riser pipe forming the mouth opening. This can be achieved, for example, by intercepting the casting mold from the casting table after the casting tube has given in a slight elastic yield.
  • the casting mold can also be brought up in guides across the casting table in such a way that in the casting position the riser pipe has assumed a slightly depressed position.
  • the casting furnace with the riser pipe can be moved upwards until the desired contact pressure builds up. It is preferred here that the riser pipe passes through the casting table in an opening and the mouth opening of the riser pipe is a little above the level of the casting table, which is only used to place the casting mold, while the riser pipe and slide closure come into direct contact with one another.
  • the upper plate is displaceable and the lower plate is stationary, the pouring opening of the casting mold being larger than the passage opening in the upper plate, so that the opening in the upper plate is in both of them Positions covered.
  • the upper plate is fixed and the lower plate is displaceable and the mouth opening of the riser pipe is larger than the passage opening in the lower plate, so that it has the passage opening in the lower plate in its two positions covered. In both cases, two-plate gate valves are formed.
  • On the mold side there can also be a base plate also held in the frame of the slide closure, the passage opening of which must correspond to the pouring opening of the mold.
  • a connecting plate with the mouth opening of the riser pipe and the riser pipe firmly connected to it are attached to one end of an elastic corrugated pipe, and a base flange firmly connected to the casting furnace is connected to the other end of the elastic corrugated pipe. If a casting mold is lowered onto the riser pipe, this corrugated pipe can compensate for height and angle errors in the connection plane of the casting mold.
  • the riser pipe has a connection flange at the upper end, on which a ceramic connection plate is held, which directly forms the mouth opening of the riser pipe.
  • the mouth opening is an elongated hole and that the mouth opening widens downward within the connection plate with small opening angles ( ⁇ 3 , ⁇ 4 ).
  • the backflow of the melt from the slide closure after the shut-off is promoted in that the passage opening in the lower plate widens downward with a small opening angle ( ⁇ 2 ).
  • the passage opening in the upper plate widens upwards with a small opening angle ( ⁇ ,).
  • the casting mold can be a permanent casting mold or in particular a core package clamped in a mold frame.
  • a slide closure can be arranged in a fixed manner, while an actuating device for the slide closure can be fixed in place on the casting table, onto which the casting mold can be placed.
  • each slide closure can also have an integrated actuating device.
  • this initially relates to methods and devices in which a controllable gas pressure is applied to the melt level in the sealed casting furnace, which causes the melt to rise or fall back in the riser pipe.
  • a controllable gas pressure is applied to the melt level in the sealed casting furnace, which causes the melt to rise or fall back in the riser pipe.
  • other methods and devices are also included that can regulatably promote the melt in the riser pipe, e.g. Magnetic pump arrangements at the lower end of the riser pipe in the casting furnace.
  • the rising pouring / low-pressure casting relates above to a vertical pouring of the casting molds, from which the corresponding designations upper plate / upper passage opening, lower plate / lower passage opening result.
  • the object of the invention is not left, however, when casting molds with horizontal sprue are used, in which case the term "upper” is to be replaced by “mold side” and the term “lower” is to be replaced by "riser side”, with the flow direction oriented horizontally otherwise unchanged geometry and kinematics.
  • Figure 1 shows a slide member for attachment to a mold a) in bottom view b) in longitudinal section c) in cross section
  • Figure 2 shows a slide member similar to Figure 1 in arrangement on a mold frame which is placed on a casting table from which a riser emerges a) in a longitudinal section corresponding to Figure 1b b) in a cross section corresponding to Figure 1c;
  • Figure 3 shows a riser pipe with a casting table, on which a mold frame with a slide member is placed, in a simplified representation a) in a first vertical section b) in a second vertical section c) in plan view of the mold frame.
  • a slide closure 11 which comprises a base frame 24 which can be screwed from below to a permanent mold / a mold frame for a core package.
  • the base frame 24 holds, via a wedge element 29, a base plate 12 in sealing contact with a fastening surface of the permanent mold / the mold frame (not shown here).
  • the base plate 12 has a passage opening 13 which can be made to coincide with a pouring opening of the mold frame.
  • the frame 27 is used for low-tension fixing of the first slide plate 14, which is made of refractory material.
  • the passage opening 15 of the fixedly arranged first slide plate 14 is aligned with the passage opening 13 in the base plate 12.
  • the openings 13, 15 are undercut-free in the direction of the mold to be assumed above.
  • a second slide plate 16, which has a lower passage opening 17, is arranged under the first slide plate 14.
  • the slide plate 16 is clamped in a flat sealing contact with the first slide plate 14 and in a frame 28.
  • the frame 28 is used for low-tension clamping of the second, made of refractory material Slide plate 16.
  • the two slide plates 14, 16 are pressed against each other and together against the base plate 12 by resilient holding means.
  • the holding means are constructed directly on the base plate 12 and comprise two holding rails 18, 19 which are pivotably held in pairs of tabs 20, 21, 22, 23 fastened to the base plate 12 in pivots 30, 31, 32, 33.
  • the second slide plate 16 can be manipulated by a rod 26 which engages the frame 28 and slides in a guide piece 25 placed on the base frame 24.
  • the passage openings 13, 15, 17 mentioned in the base plate 12 and in the slide plates 14, 16 are each circular. In the position shown in solid lines in FIG.
  • the lower slide plate 16 is displaced relative to the upper slide plate 15 in such a way that the through openings 15, 17 are completely offset from one another, ie the slide closure is in its closed position.
  • the slide closure is in its closed position.
  • FIG. 2 shows the upper end of a casting furnace 81 (only FIG. 2a) as well as an overlying casting table 51 and a mold frame 61 placed on the casting table in their mutual assignment for a casting process.
  • the casting furnace 81 has an upper opening 82 into which a riser pipe 83 is inserted with the interposition of an elastic corrugated pipe 84.
  • the corrugated pipe 84 points to the connection to the casting furnace 81 and
  • Riser pipe 83 has two connecting flanges 85, 86, which are sealed via seals 87, 88 with respect to casting furnace 81 and a riser pipe flange 89 attached to the riser pipe at the top.
  • the lower connecting flange 85 is clamped to the casting furnace 81 by means of holding clamps 90, 91, by screws 92, 93.
  • the upper connecting flange 86 is screwed directly to the riser pipe flange 89 by means of screws 94, 95. Further screw connections are not numbered in detail.
  • a retaining ring 96 is placed on the riser flange 89, which in turn carries a clamping ring 97.
  • the clamping ring holds a contact plate 98 with an opening 99. As can be seen in the comparison of FIGS. 2a and 2b, the opening 99 is elongated and approximately twice the length and width.
  • the last-mentioned parts forming the upper end of the riser pipe pass through the casting table 51 in a circular opening 52.
  • the mold frame 61 has a base plate 62 with a pouring opening 79 into which a sleeve 80 made of refractory material is inserted.
  • a slide closure 11 according to FIG. 1 is screwed onto the base plate 62, the sleeve 80 at the same time being fitted into the passage opening 13 of the base plate 12.
  • the conical passage opening 15 of the upper slide plate 14 adjoins the pouring opening 79, which has a cone angle ⁇ , which, as already mentioned, opens upwards.
  • the passage opening 17 of the lower slide plate 16 adjoins the passage opening 15 at the bottom with an opening angle a 2 , which opens downwards, and the opening 99 in the connecting plate 98, which has the corresponding internal helix angle ⁇ 3 , ⁇ 4 .
  • the mold frame 61 can be seen as a whole; however, the casting furnace 81 and the upper end of the riser pipe 83 are shown in simplified form compared to FIG. 2.
  • the corrugated pipe 84 with the connection flanges is only symbolically represented.
  • the form frame 61 consists of the base plate 62, a cover plate 67 and tension rods 63, 64, 65, 66. Above the cover plate 67 there is a support plate 68 to which two eyelets 69, 70 are screwed, which are connected via bolts 71, 72, 73, 74 and sleeves 75, 76, 77, 78 are screwed onto the cover plate 63.
  • the lower screw connections of the tie rods 64, 65, 66 are protected by bushings, not specified.
  • catch pins 53, 54, 55 can be seen on the casting table 51, on which the catch jaws 57, 58, 59, 60 of the mold frame 61 have caught.
  • the mold frame 61 comprises a base plate 62, to which the slide closure 11 according to FIG. 1 is screwed at the bottom.
  • the corrugated pipe 84 can yield elastically in order to ensure a completely flat contact of the contact plate 98 with the lower slide plate 16 of the slide closure 11.
  • the proportions of the opening 99 in the connection plate 98 and the passage opening 17 in the lower slide plate 16 are such that the passage opening 17 of the slide plate 16 is open with the opening 99 of the connection plate 98 both in the open position and in the closed position of the slide closure of the riser pipe 83 remains connected. This allows the melt to flow back out of the passage opening 17 into the riser pipe after the slide closure 11 has been closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Sliding Valves (AREA)
  • Barrages (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Casting Devices For Molds (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

Procédé de coulée/coulée à basse pression ascendante, en particulier d'alliages de métaux légers, qui repose sur l'utilisation d'un dispositif comportant un four de coulée situé sous un plateau de coulée et doté d'un tuyau ascendant formant une bouche, et un moule doté d'un orifice de coulée placé vers le bas et d'une fermeture coulissante formant un canal traversant qui présente pour la coulée une trajectoire longitudinale essentiellement droite. La fermeture coulissante comporte deux segments d'orifice du canal traversant immédiatement adjacents qui, pour la fermeture du canal, sont poussés l'un vers l'autre transversalement par rapport à la trajectoire longitudinale du canal traversant, immédiatement après la coulée et en présence de métal en fusion encore liquide dans l'orifice de coulée, de manière telle qu'un segment d'orifice supérieur reste relié de manière ouverte avec l'orifice de coulée sans contre-dépouille et qu'un segment d'orifice inférieur reste relié de manière ouverte à la bouche du tuyau ascendant, les deux segments d'orifice étant alors complètement décalés l'un par rapport à l'autre. Ensuite, le niveau du métal fondu dans le tuyau ascendant est abaissé au-dessous de la bouche dudit tuyau, le segment d'orifice inférieur du canal traversant étant ainsi vidé du métal en fusion.
EP01969359A 2000-07-12 2001-07-10 Procede et dispositif de coulee ascendante a l'aide d'un moule pourvu d'un orifice de coulee place vers le bas et dote d'une fermeture coulissante Expired - Lifetime EP1299204B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE20122418U DE20122418U1 (de) 2000-07-12 2001-07-10 Vorrichtung zum steigenden Gießen mit einer Gießform mit untenliegender Eingußöffnung mit einem Schieberverschluß
SI200130352T SI1299204T1 (en) 2000-07-12 2001-07-10 Method and device for uphill casting/low pressure casting having a mould with anunderlying pouring-in opening and having a slide valve closure
DK01969359T DK1299204T3 (da) 2000-07-12 2001-07-10 Fremgangsmåde og indretning til stigende stöbning med en stöbeform med bundplaceret indstöbningsåbning med et skydespjæld

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10033903A DE10033903C1 (de) 2000-07-12 2000-07-12 Verfahren und Vorrichtung zum steigenden Giessen mit einer Giessform mit untenliegender Eingussöffnung mit einem Schieberverschluss
DE10033903 2000-07-12
PCT/EP2001/007916 WO2002004144A2 (fr) 2000-07-12 2001-07-10 Procede et dispositif de coulee ascendante a l'aide d'un moule pourvu d'un orifice de coulee place vers le bas et dote d'une fermeture coulissante

Publications (2)

Publication Number Publication Date
EP1299204A2 true EP1299204A2 (fr) 2003-04-09
EP1299204B1 EP1299204B1 (fr) 2005-03-23

Family

ID=7648699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969359A Expired - Lifetime EP1299204B1 (fr) 2000-07-12 2001-07-10 Procede et dispositif de coulee ascendante a l'aide d'un moule pourvu d'un orifice de coulee place vers le bas et dote d'une fermeture coulissante

Country Status (13)

Country Link
US (1) US6899159B2 (fr)
EP (1) EP1299204B1 (fr)
AT (1) ATE291514T1 (fr)
AU (2) AU8963601A (fr)
BR (1) BR0112410A (fr)
CA (1) CA2414770A1 (fr)
DE (2) DE10033903C1 (fr)
ES (1) ES2240515T3 (fr)
HU (1) HUP0301599A2 (fr)
MX (1) MXPA03000285A (fr)
PL (1) PL199011B1 (fr)
SK (1) SK286624B6 (fr)
WO (1) WO2002004144A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10033903C1 (de) * 2000-07-12 2001-11-29 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zum steigenden Giessen mit einer Giessform mit untenliegender Eingussöffnung mit einem Schieberverschluss
EP1631406B1 (fr) * 2003-06-14 2007-04-11 Stopinc Aktiengesellschaft Poste de coulee, notamment pour la coulee du metal sous pression
DE102004016574A1 (de) * 2004-03-31 2005-10-27 Georg Fischer Kokillenguss GmbH Kokillengiessanlage
DE102004043444B3 (de) 2004-09-06 2006-06-14 Hydro Aluminium Alucast Gmbh Verfahren und Vorrichtung zum Gießen von Metallschmelze
KR101517571B1 (ko) * 2014-06-26 2015-05-06 고동근 진공환경에서 금속을 용해하고 성형하는 장치 및 방법

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CH415972A (de) * 1964-03-06 1966-06-30 Alusuisse Druckgiessverfahren und Einrichtung zur Durchführung des Verfahrens
FR1525455A (fr) * 1965-11-02 1968-05-17 Babcock & Wilcox Co Tubes de coulée sous pression
GB1155427A (en) * 1965-11-02 1969-06-18 Babcock & Wilcox Co Refractory Pouring Tubes
US3627018A (en) 1969-09-23 1971-12-14 Amsted Ind Inc Method for producing castings in a permanent mold
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AT317460B (de) * 1970-09-29 1974-08-26 Gravicast Patent Gmbh Vorrichtung zum Gießen im steigenden Guß oder Mittelguß und Verfahren zur Herstellung einer Gußform zur Verwendung in dieser Vorrichtung
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FR2663571B1 (fr) 1990-06-22 1994-11-25 Pont A Mousson Procede, moule et installation de coulee de metal sous basse pression.
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DE10033903C1 (de) * 2000-07-12 2001-11-29 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zum steigenden Giessen mit einer Giessform mit untenliegender Eingussöffnung mit einem Schieberverschluss
DE10033904A1 (de) * 2000-07-12 2002-01-31 Stopinc Ag Huenenberg Schieberverschluss zum Vergiessen von Metallschmelze, sowie eine dazugehörige feuerfeste Platteneinheit

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See references of WO0204144A2 *

Also Published As

Publication number Publication date
US20040011496A1 (en) 2004-01-22
DE10033903C1 (de) 2001-11-29
EP1299204B1 (fr) 2005-03-23
SK242003A3 (en) 2003-10-07
PL359759A1 (en) 2004-09-06
AU2001289636B2 (en) 2004-11-04
AU8963601A (en) 2002-01-21
WO2002004144A9 (fr) 2002-09-19
MXPA03000285A (es) 2005-04-19
US6899159B2 (en) 2005-05-31
DE50105702D1 (de) 2005-04-28
HUP0301599A2 (en) 2003-08-28
BR0112410A (pt) 2003-05-27
SK286624B6 (sk) 2009-02-05
WO2002004144A2 (fr) 2002-01-17
ATE291514T1 (de) 2005-04-15
CA2414770A1 (fr) 2002-01-17
PL199011B1 (pl) 2008-08-29
WO2002004144A3 (fr) 2002-06-20
ES2240515T3 (es) 2005-10-16

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