EP0878256A1 - Procédé et dispositif de coulée contre gravité dans les moules en sable - Google Patents

Procédé et dispositif de coulée contre gravité dans les moules en sable Download PDF

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Publication number
EP0878256A1
EP0878256A1 EP98103793A EP98103793A EP0878256A1 EP 0878256 A1 EP0878256 A1 EP 0878256A1 EP 98103793 A EP98103793 A EP 98103793A EP 98103793 A EP98103793 A EP 98103793A EP 0878256 A1 EP0878256 A1 EP 0878256A1
Authority
EP
European Patent Office
Prior art keywords
mold
transport plate
riser pipe
casting
crucible
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.)
Withdrawn
Application number
EP98103793A
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German (de)
English (en)
Inventor
Herbert Dipl.-Ing. Grolla
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.)
Heinrich Wagner Sinto Maschinenfabrik GmbH
Original Assignee
Heinrich Wagner Sinto Maschinenfabrik 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 Heinrich Wagner Sinto Maschinenfabrik GmbH filed Critical Heinrich Wagner Sinto Maschinenfabrik GmbH
Publication of EP0878256A1 publication Critical patent/EP0878256A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Definitions

  • the invention relates to a method for increasing Pour into sand molds with liquid metal in one Pouring device by placing in a crucible liquid metal from below in the associated on a transport plate arranged mold, which in an upper box and a lower box is divided, is fed via a riser pipe, the riser pipe to a continuous recess provided for this purpose in the transport plate is attached from below and the at least one inflow opening for its bottom the submersible from placed at the top with the inflow opening on the recess is, as well as a device for performing the method.
  • Foundries are predominantly used to produce castings two-piece sand molds used, whose Mold cavities are filled with liquid metal.
  • so-called Feeder provided when casting the mold be filled with liquid metal from which the casting Vacuum liquid metal while cooling can and around the shrinkage when solidifying the Balance the melt so that it is as homogeneous as possible Cast structure arises.
  • DE-OS 20 56 243 a method of the type mentioned is known, where the molds are filled from below.
  • the liquid metal is poured in from a heated container pressed the shape.
  • the connection between container and Form replaces the feeder.
  • the pressure of the liquid material arises here by tilting the container, so that the melt level in the container is higher than that Casting mold, and is maintained until that Casting is solidified, which takes some time and therefore affects performance.
  • Permanent forms made of metal are expensive, as are those made from chemically bound sands due to the high cost, that arise from the reprocessing of the sand.
  • sand molds are also available in large numbers cheap to produce and reprocess of the sand is easy and environmentally friendly to carry out.
  • the method according to the invention is accordingly distinguished characterized in that after insertion into the casting device the transport plate is lowered, that on the Casting plate to prevent floating the top box is secured by means of holding means, that the riser pipe to the in the transport plate for this provided recess tightly connects that hereafter the liquid metal from the crucible through the riser is pressed into the mold and that after filling the transport plate back to the starting level is raised.
  • the crucible is pressurized with compressed air and that the this creates the internal pressure of the liquid metal the crucible over the riser pipe into the mold.
  • a device for performing the invention Method has a casting device, which the absorbs liquid metal in a crucible and with at least a riser pipe through which the liquid metal from below into the assigned mold reaches which mold from an upper box and a lower box is formed, the one horizontally have aligned parting line, and on a transport plate is arranged, which sub-box on his Bottom at least one inflow opening for the has molten metal, each inflow opening with one provided for this in the transport plate continuous recess cooperates and the Pouring device for filling the mold with at least a riser pipe to the continuous recess is applicable.
  • the inventive Pouring device on a scaffold, which the Carries transport plate with the mold.
  • a melting pot below the transport plate arranged with the riser.
  • a above the transport plate Traverse is arranged on which a pressure plate which is a floating of the top box the mold prevented.
  • each transport plate with exchangeable bushings provided, which with the attached riser pipe form a seal on the casting device.
  • the bushings with sealing elements provided, such as sealing edges or sealing lips.
  • the Transport plate can be moved vertically in the supporting frame, this means that it can be lowered and / or raised.
  • a further improvement of the invention provides that the pouring device is equipped with a cover which seals the mold.
  • the cover with a vacuum device too connect, by means of which a vacuum on the mold is transferable. It is advantageous here that the pressure plate is provided with through openings.
  • the casting device is to ensure the liquid metal with a compressed air device, for example Compressor or pressure bottle, connected, what compressed air provides for the application of the crucible, around the molten metal over the riser pipe to promote in the mold.
  • a compressed air device for example Compressor or pressure bottle
  • Fig. 1 is a longitudinal section through an inventive Pouring device 10 shown, which in a not Casting and molding plant shown is.
  • Transport plates are made from this casting and molding plant 12, each loaded with an empty sand mold 14 are, the casting device from the left side of the illustration in Fig. 1 on one of individual rolls 16th Formed roller conveyor fed and after filling with molten metal 18 to the right corresponding to that Arrow T dissipated.
  • Each mold 14 consists of an upper box 14.1 and a lower box 14.2, which has a feed opening 15 for has molten metal.
  • the sub-box 14.2 is placed on the transport plate 12 so that he hereby with his feed opening 15 above one corresponding recess 13 in the transport plate 12 rests, through which the molten metal 18 at Filling flows.
  • the molten metal 18 is in a crucible 20, the one below that in the casting device 10 Transport plate 12 is arranged.
  • a riser pipe 22 is used, which is about ⁇ the height of the crucible 20 dips into this.
  • the casting device 10 comprises a suspension 19, in which is preferably held the crucible 20 Scaffold 24 that extends upwards and that on the Transport plate 12 supplied mold 14 protrudes, and one with springs 26, not here in detail shown lifting and lowering device for the in the casting device located transport plate 12, the also with a section of the roller conveyor mentioned above Is provided.
  • the frame 24 is provided with a pressing device 28, which a pressure plate 30 and a cover 32 lowered to the mold 14 below and so the mold 14 fixed locally, so that the top box 14.1 when filling with molten metal 18 not floats and thereby the casting process respectively prevents the production of the desired casting 17.
  • the mold 14 is in the example shown sealing cover 32 with a not shown Vacuum device connected, which is under the hood 32 sets a negative pressure, which accordingly Arrow U is generated.
  • FIG. 1 the arrangement according to FIG. 1 is in one order 90 ° pivoted sectional view shown. Both representations show those with the empty mold 14 of the Pouring device 10 supplied transport plate 12 before filling with molten metal 18.
  • 3 and 4 is the same arrangement 1 and 2 shown during filling with molten metal 18.
  • the in Casting device located transport plate 12 a little lowered so that the top of the riser directly at the recess 13 in the transport plate 12 is present.
  • this recess 13 is with an interchangeable one shown in Fig. 5 on a larger scale
  • Provide feed socket 13.1 which on the Riser pipe 22 facing side with a seal 23 is provided.
  • the power socket 13.1 replaced.
  • a holder 19 molded nozzle 21 from a not shown Compressed air source, for example pressure accumulator, compressor or compressed air bottle, compressed air P supplied, which acts on the melt surface 18 in the crucible 20 and so through the riser 22 into the mold 14 presses where the molten metal 18 solidifies to the casting 17.
  • Compressed air source for example pressure accumulator, compressor or compressed air bottle
  • compressed air P supplied which acts on the melt surface 18 in the crucible 20 and so through the riser 22 into the mold 14 presses where the molten metal 18 solidifies to the casting 17.
  • Each casting device 10 according to FIGS. 1 to 4 serves to the mold 14 from below under pressure with liquid metal to fill.
  • the liquid metal is in the heated crucible 20, which has a closable Opening can be refilled.
  • the pourable forms 14 are on the transport plates 12 of the casting device 10 fed.
  • the transport plates are 12 on the Point 13, where the filling opening 15 of the mold is located, equipped with interchangeable sockets 13.1.
  • the bushings 13.1 have sealing edges or sealing lips 23, thus a leak-free connection between the form 14 and the crucible 20 can be manufactured.
  • Above the Form 14 are the lowerable pressure plate and the hood 32 following the mold 14 before casting below against the riser pipe 22 of the casting device 10 to press.
  • riser pipe 22, socket 13.1 and fill opening form 15 in the form 14 a continuous channel, through which the liquid material 18 get into the mold 14 can.
  • the pressure plate 30 designed as a perforated plate that against the mold surface can be pressed so that the upper part of the mold 14.1 is not lifted, even if the liquid metal 18 reaches mold 14 with higher pressure.
  • the hood 32 For Supporting the filling process and reducing the Cooling time is the hood 32 to a vacuum pump connected.
  • the roller conveyor is in the area of the casting device 10 with springs 26 resiliently mounted so that on the Transport plate 12 lying shape 14 by the pressure of the Hood 32 can dodge down, causing contact made between socket 13.1 and riser 22 becomes.
  • the compressed air supply 21 to the crucible 20 is opened.
  • the compressed air acts on the surface of the metal bath 18 and presses the liquid metal into the mold 14.
  • the pressure is maintained until the shape 14 completely solidified into a casting 17 and theshrinking process is finished.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP98103793A 1997-05-14 1998-03-04 Procédé et dispositif de coulée contre gravité dans les moules en sable Withdrawn EP0878256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19720057 1997-05-14
DE1997120057 DE19720057A1 (de) 1997-05-14 1997-05-14 Verfahren und Vorrichtung zum steigenden Gießen in Sand-Gießformen

Publications (1)

Publication Number Publication Date
EP0878256A1 true EP0878256A1 (fr) 1998-11-18

Family

ID=7829356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98103793A Withdrawn EP0878256A1 (fr) 1997-05-14 1998-03-04 Procédé et dispositif de coulée contre gravité dans les moules en sable

Country Status (2)

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EP (1) EP0878256A1 (fr)
DE (1) DE19720057A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843285A1 (de) * 1998-09-22 2000-03-23 Georg Fischer Disa Ag Vorrichtung zum steigenden Niederdruck-Gießen von Metallen, insbesondere Leichtmetallen
EP1097767A1 (fr) * 1999-11-06 2001-05-09 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé et dispositif pour la fabrication d'un moule constitué de deux demi-moules et la coulée de métal liquide dans un tel moule
CN110666136A (zh) * 2019-09-26 2020-01-10 温州瑞明工业股份有限公司 一种半自动砂型低压辊道成型系统

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19845389A1 (de) * 1998-10-02 2000-04-06 Georg Fischer Disa Ag Vorrichtung zum steigenden Niederdruck-Gießen von Metallschmelzen
DE19936973A1 (de) * 1999-08-05 2001-02-08 Induga Industrieoefen Und Gies Vorrichtung zum Niederdruckgießen von Metallen
DE10033625A1 (de) * 2000-07-11 2002-01-31 Vaw Ver Aluminium Werke Ag Verfahren und Vorrichtung zum steigenden Gießen mit einer Kokille / einem Kernpaket mit offener Eingußöffnung
DE10327165B4 (de) * 2003-06-15 2008-08-07 Kern Gmbh Magnesium-Giesstechnik Vorrichtung zur Herstellung von Leichtmetallgusserzeugnissen
DE102020003065A1 (de) 2020-05-24 2021-11-25 BorgWarner Turbo Systems Worldwide Headquarters GrnbH Schmelz- und Gießverfahren und kombinierte Schmelz- und Gießofenanlage
CN115026263B (zh) * 2022-06-09 2024-04-12 浙江惠通全成重工机械科技有限公司 一种减速机箱体铸造用模具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056243A1 (en) * 1970-11-16 1972-05-18 Heinrich Wagner, Maschinenfabrik, 5928 Laasphe Bottom feeding casting plant - with melt level statically adjusted
EP0752292A1 (fr) * 1995-07-07 1997-01-08 Sintokogio, Ltd. Installation de coulée à basse pression comportant deux cuves à métal liquide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2056243A1 (en) * 1970-11-16 1972-05-18 Heinrich Wagner, Maschinenfabrik, 5928 Laasphe Bottom feeding casting plant - with melt level statically adjusted
EP0752292A1 (fr) * 1995-07-07 1997-01-08 Sintokogio, Ltd. Installation de coulée à basse pression comportant deux cuves à métal liquide

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843285A1 (de) * 1998-09-22 2000-03-23 Georg Fischer Disa Ag Vorrichtung zum steigenden Niederdruck-Gießen von Metallen, insbesondere Leichtmetallen
US6460603B1 (en) 1998-09-22 2002-10-08 Georg Fischer Disa Ag Apparatus for the uphill low pressure casting of metals, particularly light metals
EP1097767A1 (fr) * 1999-11-06 2001-05-09 Heinrich Wagner Sinto Maschinenfabrik GmbH Procédé et dispositif pour la fabrication d'un moule constitué de deux demi-moules et la coulée de métal liquide dans un tel moule
CN110666136A (zh) * 2019-09-26 2020-01-10 温州瑞明工业股份有限公司 一种半自动砂型低压辊道成型系统
CN110666136B (zh) * 2019-09-26 2021-06-22 温州瑞明工业股份有限公司 一种半自动砂型低压辊道成型系统

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Publication number Publication date
DE19720057A1 (de) 1998-11-19

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