EP1786576B1 - Verfahren und vorrichtung zum giessen von metallschmelze - Google Patents

Verfahren und vorrichtung zum giessen von metallschmelze Download PDF

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Publication number
EP1786576B1
EP1786576B1 EP05778033A EP05778033A EP1786576B1 EP 1786576 B1 EP1786576 B1 EP 1786576B1 EP 05778033 A EP05778033 A EP 05778033A EP 05778033 A EP05778033 A EP 05778033A EP 1786576 B1 EP1786576 B1 EP 1786576B1
Authority
EP
European Patent Office
Prior art keywords
casting mould
casting
mold
melt
molten metal
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.)
Active
Application number
EP05778033A
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German (de)
English (en)
French (fr)
Other versions
EP1786576A1 (de
Inventor
Herbert Smetan
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.)
Nemak Dillingen GmbH
Original Assignee
Nemak Dillingen 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 Nemak Dillingen GmbH filed Critical Nemak Dillingen GmbH
Priority to PL05778033T priority Critical patent/PL1786576T3/pl
Publication of EP1786576A1 publication Critical patent/EP1786576A1/de
Application granted granted Critical
Publication of EP1786576B1 publication Critical patent/EP1786576B1/de
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Anticipated expiration legal-status Critical

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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
    • 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
    • B22D17/26—Mechanisms or devices for locking or opening dies
    • 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
    • B22D18/08—Controlling, supervising, 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
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
    • B22D21/04—Casting aluminium or magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/02—Use of electric or magnetic effects

Definitions

  • the invention relates to a method and a device for casting molten metal, in particular light metal melts, such as aluminum-based melts.
  • a casting mold which has a mold cavity which images the casting to be produced.
  • the molten metal is then poured from a melt container into the mold cavity.
  • the melt container can be, for example, a casting furnace or another container filled with melt, in which the melt is kept at a temperature level required for casting. After the melt in the casting mold has solidified to the casting to be produced, casting mold and casting are separated from each other.
  • the properties of a casting are strongly influenced by the course of the solidification of the melt in the casting mold and the make-up required to compensate for the volume shrinkage.
  • a particularly uniform distribution of properties shows when the mold filling is performed with melt in a continuous process while avoiding large melt flows in the mold and the solidification evenly distributed and used on the side opposite the feeder side of the mold.
  • melt containers are located under the mold.
  • the melt is then forced by pressurizing the atmosphere above the melt in the melt container atmosphere via a riser into the mold cavity of the mold. This is usually done by introducing a gas under pressure into the free space of the melt of the melt container.
  • a negative pressure can be applied to the mold cavity of the casting mold for conveying the melt or the molten metal can be conveyed into the casting mold by means of electromagnetic forces.
  • This filling of the casting mold with melt against the direction of gravity has the advantage that a smooth and controlled casting run is achieved with minimized turbulence of the melt.
  • the risk of casting defects in the manufactured casting can be significantly reduced.
  • a disadvantage of such methods, however, is that the molds must each remain for a long time in the casting plant, which is required for the complete solidification of each casting produced in them.
  • a device for carrying out the rising casting is for example from the DE 100 33 904 A1 known.
  • a slide closure is arranged between the mold and the melt container, which is formed of two superimposed and mutually displaceable plates, each having a passage opening.
  • the passage openings are brought into coincidence so that melt can flow through the riser from the melt container into the casting mold.
  • one of the slide plates is moved relative to the other, so that the passage openings are closed. Subsequently, the mold can be removed and another casting cycle can be started.
  • the slide closure can be removed for use.
  • a cooling device can be provided at the filling opening, which causes a targeted cooling of the melt present in the filling area.
  • a casting mold with a lower pouring opening is used, which is equipped with a detachable shut-off device.
  • the shut-off device comprises for this purpose a base frame, which is attached to the clamping frame made of molded parts screwed as a core package composite mold.
  • the base frame carries a slidably mounted on the base frame plate, in which a passage opening is formed. By moving the plate whose passage opening can be brought into coincidence with the pouring opening of the mold or the inlet opening are closed again.
  • a melt container is used according to this known method, from which the melt against gravity on a the top of the melt container attached filling channel is conveyed in a staggered over the melt container mold.
  • the lying outside of the mold part of the filling channel leads obliquely upwards and opens into the lower region of the side wall of the mold.
  • the continuation of the filling channel within the mold is horizontal. From the filling channel branch up distribution channels and several risers in the overlying cavity of the workpiece from.
  • the metal production is completed, the mold closed by a controlled by the controller sand slide and thereby separated from the outer part of the filling channel. Subsequently, the mold is rotated with the still liquid metal about a horizontal axis which extends approximately through the center of the mold. Since the filling of the mold takes place from the bottom side and the mold is separated from the filling device after closing the sand slide, the sand slider must keep the mold during the rotation permanently closed during this procedure. Otherwise, the melt would leak out of the mold. Accordingly, the sand slider is also destroyed during demoulding of the casting mold.
  • the mold filling is not optimal if, in the case of cylindrical internal geometries, particularly homogeneous solidification morphologies are required.
  • Object of the present invention was to produce castings with high productivity, which also meet further increased quality requirements safely.
  • a device for casting molten metal with a mold having a filling opening, with a device for coupling the mold to a melt container, which is arranged in this operating position below the mold and contains the molten metal, with a device for conveying the molten metal from the melt container into the mold through the filling opening the direction of gravity, with a device for uncoupling the casting mold from the melt container, with a device for rotating the casting mold in the state uncoupled from the melt container about a horizontal axis associated with the casting mold, with a control device which emits a signal for rotating the casting mold about its axis of rotation, when the mold is filled with melt, and with a at least during rotation about its horizontal axis fixed to the mold connected shut-off device for closing the filling opening of the mold, which is releasably connected to the mold.
  • the invention combines rising casting with rotational molding.
  • the invention provides a closure connected to the mold, which remains firmly attached to the mold during rotation and keeps it closed. In this way, it is no longer necessary to wait until the beginning of the rotational movement that a sufficient amount of solidified melt material has formed in the filling opening of the casting mold, but the rotational movement can begin immediately after the filling of the casting mold has ended. Already in this way will be considerably shorter Cycle times achieved when they are possible in the usual rising casting.
  • the mold By the mold is sealed immediately after the filling with melt by at least during the turning operation firmly connected to the mold shut-off device, the mold can be decoupled from the melt container immediately after closing with still liquid molten metal.
  • the shut-off device is separated from the mold according to the invention. In this position, in which the effect of gravity prevents leakage of melt from the mold, unlike in the filling position and during the turning process itself, there is no longer any risk of melt leakage.
  • the separate from the mold shut-off can then be used again for closing subsequently to be filled molds.
  • the melt container is directly after pouring the molten metal into the casting mold for the next casting operation and, if necessary, for refilling Molten metal ready. This, too, leads to productivity, economic efficiency and increased productivity Availability of a device according to the invention over the prior art are increased.
  • the inventive arrangement of at least for the period of rotation connected to the mold shut-off device to perform the rotation of the mold without a docked to the mold melt container.
  • casting of cast parts can not only take place within short cycle times, but also proceeds in a mode of operation which can be implemented simply in terms of apparatus.
  • the inventive method and the device according to the invention are operationally safe to carry out.
  • the shut-off device can be sufficiently firmly connected to the casting mold in order to securely hold the casting mold tightly closed during rotation despite the resulting loads and to reliably prevent the still molten metal melt from escaping from the mold. This was all the more surprising with the use of such shut-off devices which are released from the casting mold after being turned to be used again.
  • high-quality castings are thus obtained by a complete mold filling with optimized solidification of the molten metal, wherein at the same time the productivity is significantly increased compared to the prior art.
  • the melt container may be, for example, a casting furnace known per se for low-pressure casting.
  • a device according to the invention may comprise a device for pressurizing the melt surface in the melt container.
  • the device for pressurizing may in particular be a compressed gas supply connected to the interior of the melt container via a valve, via which gas can be passed under pressure into the interior, which acts on the surface of the melt contained in the interior of the melt container.
  • the gas can be air. If the risk of oxidation in the melt container is to be reduced, however, it is also possible to use a gas which is inert with respect to the molten metal, for example nitrogen or a noble gas.
  • a particularly robust embodiment of a device according to the invention results when the shut-off device is designed as a slide closure.
  • a slide closure is usually characterized in that a first element of the closure can be displaced such that in a first position of the element a shut-off opening is opened and in a second position of the element, the opening is closed.
  • Such a slide closure can be easily manufactured and takes up only a small amount of space.
  • the slide closure according to the model of the prior art in particular at least two plates each having a passage opening, wherein for closing the mold at least one of the plates from an open position in which the passages are in overlap, is moved to a closed position, in which the passage openings are completely offset from each other.
  • Such a design of the slide closure is on the one hand robust and easy in the production technology application.
  • this embodiment ensures in a particularly secure manner that no molten metal escapes from the casting mold during a rotation of the casting mold.
  • the casting mold may be a permanent casting mold.
  • molded parts such as molded sand parts.
  • Such a mold also referred to as a core package, is destroyed after the casting process and the solidification of the molten metal to the casting, so that then the finished casting is obtained.
  • the casting mold has both permanent casting moldings and molding cores if, for example, complex internal shapes of the casting are to be produced.
  • FIGS. 1 to 5 each show schematically a device for casting of light metal melt in four different operating positions in a partially broken side view.
  • the device V for casting an aluminum-based melt A comprises a casting mold 1, in whose wall 1a a filling opening 2 is formed.
  • the filling opening 2 opens into a formed in the mold 1 feeder section 3, which feeds the mold cavity 4, through which the casting to be produced is imaged.
  • cooling iron 5 are used in the mold cavity 4 .
  • the cooling irons 5 effect a targeted solidification profile in order to form a specific microstructure in the regions of the cast part assigned to the cooling iron 5.
  • the shut-off device 6 has a first of the wall 1a directly associated slide plate 7, in which a through hole 8 is formed at a central location, and a second slide plate 9, which lies on the first slide plate 7 and in which also a through hole 10 is formed. Diameter and shape of the through holes 8,10 are on the diameter and the shape of the filling opening 2 adapted.
  • the slide plates can be moved 7.9 against each other to bring their passage opening 8.10 in a passage position with each other and with the filling opening 2 and in a closed position in which the lying outside the passage opening 8 closed portion of the slide plate 7, the filling opening 2 closes and in which a closed, lying outside the passage opening 10 portion of the second slide plate 9 is disposed below the filling opening 2 and the filling opening 2 directly closing portion of the first slide plate 7 is supported.
  • the mold 1 is rotatably mounted in a rotary bearing, not shown, about a horizontally oriented axis of rotation X. To the rotation axis X, the mold 1 can be rotated by means also not shown. In addition, the mold 1 can be lifted by means of a likewise not shown adjusting device in the vertical direction Y.
  • the device 1 comprises a melt container 12, in which the aluminum melt A to be cast is stored.
  • the melt container 12 has a lid 13, with which the melt container 12 can be sealed tightly against the environment U. Through the lid 13, a vertically aligned riser 14 is guided, the inlet opening 15 is arranged just above the bottom 16 of the melt container 12. In the operating position, the outlet opening 17 of the riser 14 is against positioned just above the lid 13.
  • the melt container 12 is mounted on rollers 18 which are guided on rails 19.
  • the orientation and rotation of the mold 1 and the working positions of the shut-off devices 6 are controlled by a control device 20.
  • the interior space enclosed by the melt container 12 with the cover 13 attached can be subjected to a compressed gas, for example air or nitrogen.
  • a supply line 21 is guided through the cover 13 into the interior 12a of the melt container 12.
  • the supply line 21 is connected to a compressed gas supply 22, which provides a required for the expulsion of each required amount of melt gas volume with sufficient pressure.
  • the mold sits with the outer slide plate 9 on the lid 13 of the positioned below the mold 1 and sealed by the lid melt container 12, wherein the Outlet opening 17 of the riser pipe 14 is aligned with the filling opening 2 of the mold 1 is aligned. In this way, the mold cavity 4 of the mold 1 is connected to the inner space 12a of the melt container 12 ( Fig. 1 ).
  • melt A rises through the riser 14 into the mold 1 and fills in a quiet flow the mold cavity 4 of the mold 1.
  • the atmosphere contained in the mold cavity 4 escapes not over illustrated vents.
  • the melt A contained in the mold cavity 4 of the mold 1 is introduced uniformly and largely avoiding turbulence in all voids formed in the mold cavity 4, so that even complex moldings, such as engine blocks for internal combustion engines or the like, are generated safely and with optimum work result can ( Fig. 2 ).
  • the control device 20 gives a signal to close the shut-off device 6.
  • the slide plates 7, 9 of the shut-off devices 6 are displaced relative to one another until their passage openings 8, 10 are closed by the closed section each other slide plate is closed 9.7.
  • control device 20 Immediately after the separation of the casting mold 1 from the melt container 12, the control device 20 outputs a signal for rotating the casting mold 1 (FIG. Fig. 4 ).
  • the turning device then rotates the casting mold 1 by 180 ° about the axis of rotation X, until its still closed by the shut-off device 6 filling opening 2 faces upwards. If this overhead position, which is directed counter to the direction of gravity, has been reached, the shut-off device 6 can be detached from the casting mold 1 and fed to a casting mold, which is not shown here, and subsequently filled with molten metal A ( Fig. 5 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Dental Prosthetics (AREA)
EP05778033A 2004-09-06 2005-09-02 Verfahren und vorrichtung zum giessen von metallschmelze Active EP1786576B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05778033T PL1786576T3 (pl) 2004-09-06 2005-09-02 Sposób i urządzenie do odlewania ciekłego metalu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004043444A DE102004043444B3 (de) 2004-09-06 2004-09-06 Verfahren und Vorrichtung zum Gießen von Metallschmelze
PCT/EP2005/009469 WO2006027174A1 (de) 2004-09-06 2005-09-02 Verfahren und vorrichtung zum giessen von metallschmelze

Publications (2)

Publication Number Publication Date
EP1786576A1 EP1786576A1 (de) 2007-05-23
EP1786576B1 true EP1786576B1 (de) 2009-07-15

Family

ID=35219472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05778033A Active EP1786576B1 (de) 2004-09-06 2005-09-02 Verfahren und vorrichtung zum giessen von metallschmelze

Country Status (14)

Country Link
US (1) US7854251B2 (es)
EP (1) EP1786576B1 (es)
JP (1) JP4891245B2 (es)
KR (1) KR20070103355A (es)
CN (1) CN101039766A (es)
AU (1) AU2005281886B2 (es)
BR (1) BRPI0514945B1 (es)
CA (1) CA2578821A1 (es)
DE (2) DE102004043444B3 (es)
ES (1) ES2330027T3 (es)
MX (1) MX2007002351A (es)
PL (1) PL1786576T3 (es)
WO (1) WO2006027174A1 (es)
ZA (1) ZA200701400B (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008221312A (ja) * 2007-03-15 2008-09-25 Honda Motor Co Ltd 遠心鋳造装置
JP5221195B2 (ja) * 2008-04-17 2013-06-26 株式会社田島軽金属 鋳造装置，鋳造システム及び方法
RU2480309C2 (ru) * 2008-11-24 2013-04-27 Немак Диллинген Гмбх Способ литья отливки из расплавленного металла
CN102632222A (zh) * 2012-05-09 2012-08-15 周学义 一种铸造装置及铸造方法
DE102015208964A1 (de) 2015-05-15 2016-11-17 Harald Justus Weis Verfahren zum Gießen von Metall, Adaptereinheit und Vorrichtung zum Gießen von Metall umfassend eine derartige Adaptereinheit
US11318531B2 (en) * 2017-04-20 2022-05-03 Ksm Castings Group Gmbh Gate valve system, casting plant, and casting process
DE102019126108A1 (de) * 2019-09-27 2021-04-01 Grohe Ag Vorrichtung zum Niederdruckgießen von Werkstücken mit einer schwenkbaren Kupplung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2637813B2 (ja) * 1989-01-18 1997-08-06 本田技研工業株式会社 金型鋳造法
DE4304622C2 (de) * 1993-02-16 1996-09-19 Bruehl Aluminiumtechnik Verfahren zum Füllen einer Gießform
DE19649014A1 (de) * 1996-11-27 1998-05-28 Ks Aluminium Technologie Ag Verfahren und Vorrichtung zum Herstellen von Gußstücken
FR2775917B1 (fr) * 1998-03-10 2000-06-02 Montupet Sa Procede de moulage en grande serie de pieces d'alliage d'aluminium et equipements associes
JP3680979B2 (ja) * 1998-11-11 2005-08-10 新東工業株式会社 鋳造用砂鋳型による鋳造方法
DE10019309C2 (de) * 2000-04-19 2002-04-18 Vaw Mandl & Berger Gmbh Linz Verfahren und Vorrichtung zum Rotationsgießen
DE10033904A1 (de) * 2000-07-12 2002-01-31 Stopinc Ag Huenenberg Schieberverschluss zum Vergiessen von Metallschmelze, sowie eine dazugehörige feuerfeste Platteneinheit
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
AU2002952343A0 (en) * 2002-10-30 2002-11-14 Castalloy Manufacturing Pty Ltd Apparatus and method for low pressure sand casting

Also Published As

Publication number Publication date
WO2006027174A1 (de) 2006-03-16
BRPI0514945A2 (pt) 2012-10-30
CA2578821A1 (en) 2006-03-16
JP2008512246A (ja) 2008-04-24
BRPI0514945B1 (pt) 2014-02-18
US20080190581A1 (en) 2008-08-14
PL1786576T3 (pl) 2009-12-31
JP4891245B2 (ja) 2012-03-07
ES2330027T3 (es) 2009-12-03
EP1786576A1 (de) 2007-05-23
US7854251B2 (en) 2010-12-21
MX2007002351A (es) 2007-08-23
AU2005281886B2 (en) 2009-10-29
DE102004043444B3 (de) 2006-06-14
ZA200701400B (en) 2008-06-28
AU2005281886A1 (en) 2006-03-16
CN101039766A (zh) 2007-09-19
KR20070103355A (ko) 2007-10-23
DE502005007712D1 (de) 2009-08-27

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