US20030178169A1 - Method and device for uphill casting, comprising a chill or core stackings with an open pouring gate - Google Patents

Method and device for uphill casting, comprising a chill or core stackings with an open pouring gate Download PDF

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Publication number
US20030178169A1
US20030178169A1 US10/312,800 US31280003A US2003178169A1 US 20030178169 A1 US20030178169 A1 US 20030178169A1 US 31280003 A US31280003 A US 31280003A US 2003178169 A1 US2003178169 A1 US 2003178169A1
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United States
Prior art keywords
casting
opening
mould
pouring
flow
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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.)
Abandoned
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US10/312,800
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English (en)
Inventor
Alexander Fischer
Wolfgang Müller
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Hydro Aluminium Deutschland GmbH
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Hydro Aluminium Deutschland GmbH
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Publication date
Application filed by Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Assigned to HYDRO ALUMINIUM DEUTSCHLAND GMBH reassignment HYDRO ALUMINIUM DEUTSCHLAND GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FISCHER, ALEXANDER, MULLER, WOLFGANG
Assigned to HYDRO ALUMINIUM DEUTSCHLAND GMBH reassignment HYDRO ALUMINIUM DEUTSCHLAND GMBH CHANGE OF ADDRESS Assignors: HYDRO ALUMINIUM DEUTSCHLAND GMBH
Publication of US20030178169A1 publication Critical patent/US20030178169A1/en
Abandoned legal-status Critical Current

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    • 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 an apparatus for uphill casting, especially for the casting of light metal alloys.
  • uphill casting has the substantial advantage of a smooth controlled casting process. By this means the entrance of air bubbles and oxidation skin which is associated with any turbulence of the melt during casting is avoided.
  • core packages as moulds, the separation and entrainment of moulding material in the gate and in the runner can be avoided which otherwise leads to a deterioration in the quality of the castings.
  • a disadvantage with uphill casting is that in general it is necessary to wait for the solidification process of up to 15 minutes duration before the mould just filled can be removed and the next mould can be brought over the casting furnace.
  • moulds should be closed directly after the low-pressure casting in the pouring-in opening and removed immediately from the riser pipe.
  • DE 198 21 419 A1 and DE 198 07 623 A1 disclose methods of the specified type in which boxless mould bodies (core packages) or moulding boxes each having a downwardly open pouring-in opening are pushed over the mouth of the riser pipe of a casting furnace which lies beneath a conveyer for these mould bodies (core packages) or moulding boxes. After the uphill casting, in each case a closure at the upper end of the riser pipe is first closed before the mould body (core package) or the moulding box is transported further and replaced by a following one.
  • the object of the invention is to improve a method and an apparatus of said type in order to increase the reliability.
  • the solution for this according to a first approach consists in a method for uphill/low-pressure casting, especially of light metal alloys, with a casting table having a flow-through opening, with a casting furnace lying below the casting table with a riser pipe forming an upwardly open mouth opening, with a mould having a base plate which has a downwardly open pouring-in opening; the mouth opening is positioned against the flow-through opening in a sealing fashion from below, the mould is brought with its pouring-in opening over the flow-through opening, melt is conveyed from the casting furnace via the riser pipe into the mould until it is filled, the mould is displaced horizontally on the casting furnace with open melt-filled communication between the casting furnace and the mould until the pouring-in opening is closed by the casting table below and the flow-through opening is closed by the base plate above, and the melt is allowed to drop in the riser pipe as far as below the mouth opening.
  • a method for uphill/low-pressure casting is proposed with a casting table having a flow-through opening, with a casting furnace lying below the casting table with a riser pipe forming an upwardly open mouth opening, with a mould having a base plate which has a downwardly open pouring-in opening, the mouth opening is positioned against the flow-through opening in a sealing fashion from below, the mould is brought with its pouring-in opening over the flow-through opening, melt is conveyed from the casting furnace via the riser pipe into the mould until it is filled, the mould is left in this position until the casting has solidified, the melt is allowed to drop in the riser pipe as far as below the mouth opening, the mould is displaced horizontally on the casting table with its flow-through opening emptied of melt, until the pouring-in opening is closed by the casting table below and the mouth opening is closed by the base plate above.
  • An apparatus suitable for implementing these methods comprises a casting table with a flow-through opening, a casting furnace lying below the casting table with a riser pipe, forming an upwardly open mouth opening, a mould with a base plate having a downwardly open pouring-in opening; the mouth opening is positioned against the flow-through opening in a sealing fashion from below, the mould is positioned with its pouring-in opening against the flow-through opening from above, means for horizontal displacement of the mould on the casting table and means for simultaneously maintaining a positive pre-pressure of the mould base plate towards the casting table.
  • the mould with still-liquid melt in the downwardly open sprue is displaced with respect to the flow-through opening of the casting table or the mouth of the riser pipe on the casting table such that the previously uniform melt column in the riser pipe and in the sprue is directly and exclusively sheared by the displacement of the sprue of the mould with respect to the flow-through opening in the casting table or the mouth opening of the riser pipe.
  • Acting as closure means here are the upper side of the casting table which can be reinforced with an inserted ceramic plate or rail, and the underside of the base plate of the mould which lie flat one on top of the other.
  • the moulds can be conveyed into the casting position in various ways, wherein either the mould is in each case placed from above on the casting table so that the flow-through opening or the mouth opening is in open communication with the pouring-in opening or wherein alternatively, the mould is in each case transferred horizontally over the casting table so that the flow-through opening or the mouth opening is in open communication with the pouring-in opening.
  • the mould After casting and displacement, the mould can be held in a position in which the casting table under the pouring-in opening of the mould is cooled. In addition to this, the mould with the pouring-in opening can be moved during displacement over the cooled section of the casting table. By means of these two measures rapid solidification of the melt is in the sprue achieved after which the mould can be lifted from the casting table or the corresponding conveying means with solidification not yet completed.
  • FIGS. 1 to 8 show an apparatus according to the invention with a casting table, casting furnace and two moulds, with the individual phases:
  • FIG. 1 Build-up of a pre-pressure in the casting furnace; mould 1 in casting position;
  • mould 2 is opened
  • FIG. 2 Casting of mould 1 ; mould 2 is closed;
  • FIG. 3 Mould 2 in casting position; mould 1 in solidification position;
  • FIG. 4 Casting of mould 2 ; mould 1 is opened;
  • FIG. 5 Casting of mould 2 ; demoulding of mould 1 ;
  • FIG. 6 Mould 1 in casting position; mould 2 in solidification position;
  • FIG. 7 Casting of mould 1 ; mould 2 is opened;
  • FIG. 8 Casting of mould 1 ; demoulding of mould 2 ;
  • FIG. 9A casting installation according to the invention with a plurality of moulds
  • FIG. 10 shows a casting installation according to the invention with a smelting furnace, two casting stations and four casting furnaces.
  • FIGS. 1 to 8 are first described jointly insofar as the details agree.
  • a horizontal casting table 11 has a flow-through opening 12 which is lined with an outer lining 13 and an inner lining 14 .
  • Below the casting table 11 there is a casting furnace 21 having a riser pipe 22 which is inserted in the casting furnace in a sealing fashion and at the bottom is immersed in the melt 23 contained therein and at the top has a mouth opening 24 .
  • An arrow 25 indicates that compressed air can be applied to the casting furnace 21 so that a melt column 26 rises in the riser pipe 22 .
  • On the casting table are located two moulds designated by the numbers “1” and “2” which have a common base plate 30 .
  • This base plate 30 has pouring-in openings 31 , 32 which can be brought to cover the flow-through opening 12 alternatively by transverse displacement of the base plate 30 .
  • the pouring-in openings 31 , 32 are each provided with linings 33 , 34 .
  • the moulds 1 , 2 mounted on the base plate 30 each have holders 35 , 36 , 37 , 38 with adjusting cylinders 39 , 40 , 41 , 42 which act on mould halves 43 , 44 , 45 , 46 . Midway between the mould halves there is a central mandrel 47 , 48 , respectively, whose suspension is not shown in detail.
  • this mandrel 47 , 48 respectively forms a hollow cylinder with slightly conical inner shape and external ribbing.
  • the casting to be produced using the moulds 1 , 2 shown can especially be a light-metal cylinder liner for combustion engines. Changes in volume and shape of the casting during solidification are neglected in all representations.
  • the riser pipe 22 adjoins the casting table 11 at the bottom in the area of the flow-through opening 12 in a sealing fashion.
  • the casting furnace 21 can be adjustable in height from below towards the casting table 11 with the riser pipe 22 suspended elastically in the casting furnace 21 .
  • the respective pouring-in opening 31 , 32 in the base plate 30 in each case lies on the upper outlet of the flow-through opening 12 in a sealing fashion.
  • Lowering of the casting furnace is especially advantageous to exchange an empty casting furnace for a filled casting furnace.
  • FIG. 1 a pre-pressure is built up in the casting furnace which makes the melt column 26 rise as far as slightly above the mouth opening 24 .
  • the mould 1 is allocated to the casting furnace 21 by displacing the base plate 30 to the right into a first casting position.
  • the mould 1 is closed, as indicated by arrows and ready for casting.
  • the mould 2 is opened, as indicated by arrows and demoulded.
  • FIG. 2 the pre-pressure in the casting furnace 21 is increased so that the melt column 26 has risen and the mould 1 is completely filled.
  • the casting process as such is already ended here.
  • the mould 2 is now shown closed, as indicated by the arrows.
  • the base plate 30 is displaced to the left into a second casting position wherein the melt column in the mould 1 has been sheared between the casting table 11 and the base plate 30 and a finished casting has formed in mould 1 .
  • Mould 2 is allocated to the casting furnace 21 by displacing the base plate 30 to the left into a second casting position and is in the closed position ready for casting.
  • the melt column 26 is initially made to drop again in the riser pipe 22 as far as slightly above the mouth opening 24 .
  • mould 1 is opened as indicated by arrows, wherein the finished casting is held still on the central mandrel 47 .
  • the melt column has risen as a result of a pressure increase in the casting furnace so that the mould is completely filled. The actual casting process has already ended here.
  • FIG. 5 the mould 1 is re-closed wherein the finished casting 49 is completely demoulded. Mould 2 is shown as in FIG. 4 during the casting process.
  • mould 2 is opened as shown by arrows wherein a finished casting still sits on the central pin 48 .
  • the melt column 26 has risen as a result of increasing the pre-pressure in the casting furnace 21 and is thus filled, so that the actual casting process is completed here.
  • FIG. 8 the casting 50 is removed from mould 2 and the mould is re-closed for the next casting process.
  • Mould 1 is in the same position as in FIG. 7 and by displacing the mould with the base plate the melt column 26 is sheared in the next moment between the base plate 30 and the casting table 11 .
  • FIG. 9 shows a casting table 51 with a flow-through opening 52 and cooling positions 53 , 54 indicated by arrows.
  • a casting furnace 61 with a riser pipe 62 filled with melt.
  • the mouth opening 64 of the riser pipe 62 adjoins the flow-through opening 52 from below.
  • Three individual moulds 71 , 72 , 73 are placed on the casting table 51 .
  • the mould 71 has its sprue 74 over the casting furnace 61 and is directly engaged in the casting process.
  • the mould 72 has already been displaced left with respect to the flow-through opening 52 wherein the melt column has been sheared and is located in a position where the sprue 75 , 76 in the mould 72 , 73 lies above a cooling region 53 of the casting table.
  • the mould 73 is displaced further and is located in a position in which the sprue 75 , 76 in the mould 72 , 73 lies over a cooling region 53 , 54 of the casting table wherein solidification has taken place in the sprue 76 . From here the mould can be displaced further or lifted directly from the casting table.
  • Arrows 77 , 78 indicate the effect of a pre-pressure which prevents escape of the melt during filling of the mould.
  • An arrow 79 indicates the effect of a higher active pressure for feeding.
  • FIG. 10 shows a top view of an apparatus according to the invention wherein a casting table 91 is only constructed as a narrow path.
  • the casting table here has two casting stations 92 , 93 with flow-through openings 94 , 95 and two solidification stations 96 , 97 .
  • Moulds 101 , 102 can each be placed on the casting stations from above for casting wherein, after casting, they can be displaced and then take on the positions of the moulds 103 , 104 shown here during soldification.
  • Casting furnaces ND 1 , ND 2 , ND 3 , ND 4 can be brought into the vicinity of a melting furnace 111 and from there can be moved into a holding position before the casting stations 92 , 93 , into a casting position and into a holding position behind the casting stations 92 , 93 so that empty casting furnaces can each be refilled at the melting furnace 111 and after a casting furnace has been emptied, a filled casting furnace can immediately be refilled from a waiting position into the casting position under the casting table.
  • At least one of the casting stations 92 , 93 of the casting table should always be ready for casting so that there is no interruption of production during changing a casting furnace. In the normal case, the two casting stations can also be run in parallel to increase the production rate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Casting Devices For Molds (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Confectionery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US10/312,800 2000-07-11 2001-07-10 Method and device for uphill casting, comprising a chill or core stackings with an open pouring gate Abandoned US20030178169A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE100-33-625.6 2000-07-11
DE10033625A DE10033625A1 (de) 2000-07-11 2000-07-11 Verfahren und Vorrichtung zum steigenden Gießen mit einer Kokille / einem Kernpaket mit offener Eingußöffnung

Publications (1)

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US20030178169A1 true US20030178169A1 (en) 2003-09-25

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US10/312,800 Abandoned US20030178169A1 (en) 2000-07-11 2001-07-10 Method and device for uphill casting, comprising a chill or core stackings with an open pouring gate

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US (1) US20030178169A1 (pt)
EP (1) EP1299202B1 (pt)
AT (1) ATE260727T1 (pt)
AU (2) AU7973001A (pt)
BR (1) BR0112408A (pt)
CA (1) CA2412935A1 (pt)
DE (2) DE10033625A1 (pt)
ES (1) ES2217174T3 (pt)
HU (1) HUP0301499A2 (pt)
MX (1) MXPA03000288A (pt)
PL (1) PL198944B1 (pt)
SK (1) SK286623B6 (pt)
WO (1) WO2002004149A1 (pt)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5385197A (en) * 1990-06-22 1995-01-31 Pont-A-Mousson Method and apparatus for feeding a recessed sand mold with molten metal under low pressure
US6196294B1 (en) * 1996-04-04 2001-03-06 Gustav Ohnsmann Casting plant and method of producing castings

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422121A1 (de) * 1984-06-14 1985-12-19 Institut po Metalosnanie i Technologia na Metalite, Sofia/Sofija Fertigungslinie fuer die herstellung von gussstuecken, insbesondere durch gegendruckgiessen
DE4332760A1 (de) * 1993-09-25 1995-03-30 Klaus Doehrer Verfahren zum Betreiben einer Niederdruckmetallgießvorrichtung und Niederdruckmetallgießvorrichtung dafür
DE19720057A1 (de) * 1997-05-14 1998-11-19 Wagner Heinrich Sinto Masch Verfahren und Vorrichtung zum steigenden Gießen in Sand-Gießformen
DE29708575U1 (de) * 1997-05-14 1997-07-31 Wagner Heinrich Sinto Masch Vorrichtung zum steigenden Gießen in Gießformen
IT1296351B1 (it) * 1997-11-18 1999-06-25 Imr Spa Impianto perfezionato di colata in conchiglia a bassa pressione
DE19807623A1 (de) * 1998-02-21 1999-08-26 Georg Fischer Disa Ag Niederdruck-Gießverfahren für Leichtmetalle, insbesondere Aluminium
DE19821419A1 (de) * 1998-05-13 1999-11-18 Georg Fischer Disa Ag Verfahren zum steigenden Niederdruck-Gießen von Metall, insbesondere Leichtmetall
DE19834553A1 (de) * 1998-07-31 2000-02-03 Georg Fischer Disa Ag Verfahren und Vorrichtung zum steigenden Gießen von Leichtmetall
DE19845389A1 (de) * 1998-10-02 2000-04-06 Georg Fischer Disa Ag Vorrichtung zum steigenden Niederdruck-Gießen von Metallschmelzen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5385197A (en) * 1990-06-22 1995-01-31 Pont-A-Mousson Method and apparatus for feeding a recessed sand mold with molten metal under low pressure
US6196294B1 (en) * 1996-04-04 2001-03-06 Gustav Ohnsmann Casting plant and method of producing castings

Also Published As

Publication number Publication date
AU7973001A (en) 2002-01-21
ES2217174T3 (es) 2004-11-01
EP1299202B1 (de) 2004-03-03
AU2001279730B2 (en) 2004-10-28
PL359786A1 (en) 2004-09-06
DE10033625A1 (de) 2002-01-31
ATE260727T1 (de) 2004-03-15
EP1299202A1 (de) 2003-04-09
DE50101632D1 (de) 2004-04-08
HUP0301499A2 (en) 2003-08-28
WO2002004149A1 (de) 2002-01-17
SK286623B6 (sk) 2009-02-05
MXPA03000288A (es) 2005-09-23
BR0112408A (pt) 2003-07-22
SK222003A3 (en) 2003-09-11
CA2412935A1 (en) 2002-12-23
PL198944B1 (pl) 2008-08-29

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AS Assignment

Owner name: HYDRO ALUMINIUM DEUTSCHLAND GMBH, GERMANY

Free format text: CHANGE OF ADDRESS;ASSIGNOR:HYDRO ALUMINIUM DEUTSCHLAND GMBH;REEL/FRAME:014133/0276

Effective date: 20030210

Owner name: HYDRO ALUMINIUM DEUTSCHLAND GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FISCHER, ALEXANDER;MULLER, WOLFGANG;REEL/FRAME:014135/0735

Effective date: 20030512

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION