EP1222044B1 - Dispositif de coulee avec compression finale - Google Patents

Dispositif de coulee avec compression finale Download PDF

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Publication number
EP1222044B1
EP1222044B1 EP00972579A EP00972579A EP1222044B1 EP 1222044 B1 EP1222044 B1 EP 1222044B1 EP 00972579 A EP00972579 A EP 00972579A EP 00972579 A EP00972579 A EP 00972579A EP 1222044 B1 EP1222044 B1 EP 1222044B1
Authority
EP
European Patent Office
Prior art keywords
pressure
mold
casting
mold cavity
ascending tube
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.)
Expired - Lifetime
Application number
EP00972579A
Other languages
German (de)
English (en)
Other versions
EP1222044A1 (fr
Inventor
Peter R. Sahm
Peio Stojanov
Hauke Müller-Späth
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.)
Gut Giesserei Umwelt Technik GmbH
Original Assignee
Gut Giesserei Umwelt Technik 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
Priority claimed from DE1999143153 external-priority patent/DE19943153C1/de
Application filed by Gut Giesserei Umwelt Technik GmbH filed Critical Gut Giesserei Umwelt Technik GmbH
Publication of EP1222044A1 publication Critical patent/EP1222044A1/fr
Application granted granted Critical
Publication of EP1222044B1 publication Critical patent/EP1222044B1/fr
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
    • 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
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum 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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices

Definitions

  • the invention relates to a device for pressure and / or vacuum-based Casting workpieces according to the preamble of claim 1.
  • a particular goal lies in the production of workpieces using the casting process therein, predetermined at predetermined locations on the cast workpiece To achieve material properties.
  • predetermined at predetermined locations on the cast workpiece For this purpose, for example, by means of casting Composite materials produced, for example in an outer area high wear resistance of the material is achieved while an inner Carrier body is essentially ductile.
  • the quality of cast Workpieces are largely dependent on the type of melt filling process the mold and the subsequent solidification process.
  • the melt is sealed in a pressure-tight manner
  • the inner space of the melting furnace can be pressurized by means of a pressure generating device. From the A ceramic riser pipe protrudes, which dips into the melt in the furnace and is connected to a mold cavity of the mold. In this way is made by pressurizing the melting furnace through the riser pipe pressed into the mold cavity of the mold.
  • the pressure in the melting furnace can in a predetermined manner the mold cavity the mold are filled with melt.
  • EP-A 937 525 describes a device for low-pressure casting of light metals especially known aluminum, which is a pressurized melting vessel contains a riser pipe with a closure near its outer mouth dips. The closure of the mouth of the riser pipe closes immediately movable. At the end of each pouring cycle, the riser pipe is poured into the sprue reaching melt column near the mouth of the riser pipe at the same time Closure of the same sheared off, this when the melt column is sheared off displaced upward melt volume in the casting mold is displaced and at least one overpressure holding the melt column against the closure is obtained.
  • the invention is therefore based on the object of an improved device of the above. To create a way with which a densification with high densification pressure is possible and at the same time the high compression pressure over a longer period of time can be kept constant with high accuracy.
  • the closure means and the second pressure generating device is integrally formed as a piston are, which is arranged above the riser pipe, the piston on one riser-side end over a first predetermined axial range a first Has diameter which has an inner diameter of the riser pipe corresponds to the fact that the piston at Slide into the riser with the first one predetermined axial area, the riser pipe pressure-tight against the mold cavity closes, and in an adjacent second predetermined axial region has a diameter which is the inner diameter of the mold cavity extension equivalent.
  • the first pressure generating device is expediently a pressure vessel and / or a compressor and / or a vacuum pump.
  • the casting mold is, for example, a permanent mold or a lost mold, in particular a mold or a sand mold.
  • the workpieces produced are, for example, pistons, brake discs, connecting rods, Rims etc. or components in which infiltration or gradient structure as well locally reinforced areas are realized.
  • the casting device shown in FIGS. 1 and 2 comprises a melting furnace 10 with heating 12, such as a heating winding, an inductive heating or a resistance heater, and with one arranged in the melting furnace 10 Crucible 14.
  • the melting furnace 10 is by means of a lid 16 and one appropriate seal sealed pressure-tight.
  • the trained one Pressure space 20 is by means of a first pressure generating device 22, such as a pressure vessel to which a predetermined pressure can be applied.
  • a riser pipe 24 extends through the cover 16, for example. a ceramic riser pipe which is immersed in a melt 26 arranged in the crucible 14. At an end of the riser pipe 24 facing away from the melting furnace 10 This opens into a mold cavity 28 which extends into a mold 30, Ex. into a mold.
  • the mold cavity 28 in forms in the mold 30 the embodiment shown a cavity for producing a piston for an internal combustion engine. However, it is clear that in the mold 30 each any shape can be formed.
  • a vacuum pump 32 is also provided, which optionally pumps out the mold 30.
  • a mold cavity extension 80 is formed in the mold cavity 28, in which a piston is arranged.
  • This piston can be moved in the direction of arrow 44 and has a first portion 36 which is in its outer diameter corresponds to an inner diameter of the riser pipe 24.
  • an outer diameter which is the inner diameter corresponds to the cavity expansion 80 and larger than the inner diameter of the riser pipe 24.
  • the outside diameter of the section 36 is chosen such that when this section 36 is inserted into a Cavity-side opening or junction of the riser pipe pressure-tight is closed against the mold cavity.
  • melt 26 is first over the riser pipe 24 is introduced into the mold cavity 28.
  • the piston is down in the direction of arrow 44 Fig. 1 moves.
  • This downward movement of the piston brings it into one Position in which it meets the opening 40 of the riser pipe 24 into the mold cavity 28 or closes in the mold cavity extension 80 with the first section 36.
  • This position is shown in Fig. 2.
  • closing the riser pipe 24 by means of section 36 it is of great importance that the in the mold cavity 28 already existing melt 26 in no way by the movement of the piston 36 is moved. This is achieved by closing it of the riser pipe 24, the mold cavity with the riser pipe 24 and the Pressure chamber 20 of the melting furnace 10 remains connected, so that the movement the piston can not build up pressure in the mold cavity 28, since this in Escapes in the direction of the melting furnace 10.
  • the post-compression results in a shorter cycle time because the metal is on Walls of the mold 30 is pressed. This leads to faster heat transfer. In contrast to conventional post-compression, this results in low turbulence Mold filling, since post-compaction only takes place after the mold has been completely filled starts.
  • This technology offers great potential for the production of composite components, which is characterized, for example, by infiltration of a preform metallic or ceramic material.
  • An area of application is, for example, the production of pistons for internal combustion engines or Brake discs for railway trains.
  • a particularly advantageous extension of the Casting process results from a combination of low pressure casting, counter pressure casting and vacuum casting.
  • the invention can be applied to both metallic Permanent forms as well as lost sand molds or other casting molds are used become.
  • An essential element of the invention is that initially the mouth 40 of the riser 24 is completed. The next one Post-compression can thus be carried out without damaging the riser pipe 24 corresponding further movement of the single piston. Possibly the process is supported by a vacuum pulling means of the vacuum pump 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (4)

  1. Dispositif pour le moulage sous pression et/ou sous vide de pièces d'oeuvres, en particulier pour le moulage à basse-pression, à contre-pression et/ou sous vide, avec un premier dispositif de génération de pression (22) qui règle une pression prédéfinie dans un four à fusion (10) dans lequel est disposée une masse fondue (26), où un tuyau ascendant (24) plongeant dans la masse fondue (26), en particulier un tuyau ascendant en céramique, est relié avec une empreinte (28) d'un moule (30), moyennant quoi est prévu un moyen de fermeture lequel isole à volonté le tuyau ascendant (24) en aval de l'empreinte (28) de manière à conserver la pression, et avec un deuxième dispositif de génération de pression prévu, lequel règle une pression de recompression prédéfinie dans l'empreinte (28) avec un tuyau ascendant (24) fermé, moyennant quoi le moyen de fermeture (36) et le deuxième dispositif de génération de pression (38) sont réalisés sous la forme de pistons, lesquels sont aménagés de manière à s'aligner axialement avec l'extrémité du tuyau ascendant (24) du côté de l'empreinte, dans un élargissement de l'empreinte (80) dont le diamètre intérieur est plus grand qu'un diamètre intérieur du tuyau ascendant (24),
    caractérisé en ce que
    le moyen de fermeture (36) et le deuxième dispositif de génération de pression (38) sont développés d'une seule pièce sous la forme d'un piston lequel est aménagé en amont du tuyau ascendant (24), où le piston présente, à une extrémité du côté du tuyau ascendant sur une première zone axiale prédéfinie, un premier diamètre, lequel correspond à un diamètre intérieur du tuyau ascendant (24), de manière à ce que le piston, lorsqu'il est inséré dans le tuyau ascendant (24), isole le tuyau ascendant (24) avec la première zone axiale (36) prédéfinie de l'empreinte (28) de manière à conserver la pression, et présente un diamètre pour une deuxième zone axiale (38) voisine prédéfinie, lequel correspond au diamètre intérieur de l'élargissement de l'empreinte (80).
  2. Dispositif selon la revendication 1, caractérisé en ce que le premier dispositif de génération de pression (22) est un réservoir sous pression et/ou un compresseur et/ou une pompe à vide.
  3. Dispositif selon les revendications 1 ou 2, caractérisé en ce que le moule (30) est un moule permanent ou un moule perdu.
  4. Dispositif selon la revendication 3, caractérisé en ce que le moule perdu est une coquille ou un moule de coulage en sable.
EP00972579A 1999-09-09 2000-09-07 Dispositif de coulee avec compression finale Expired - Lifetime EP1222044B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19943153 1999-09-09
DE1999143153 DE19943153C1 (de) 1998-03-19 1999-09-09 Gießvorrichtung mit Nachverdichtung
PCT/DE2000/003116 WO2001017714A1 (fr) 1999-09-09 2000-09-07 Dispositif de coulee avec compression finale

Publications (2)

Publication Number Publication Date
EP1222044A1 EP1222044A1 (fr) 2002-07-17
EP1222044B1 true EP1222044B1 (fr) 2003-08-13

Family

ID=7921386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00972579A Expired - Lifetime EP1222044B1 (fr) 1999-09-09 2000-09-07 Dispositif de coulee avec compression finale

Country Status (5)

Country Link
EP (1) EP1222044B1 (fr)
AT (1) ATE246975T1 (fr)
DE (1) DE50003308D1 (fr)
DK (1) DK1222044T3 (fr)
WO (1) WO2001017714A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004016574A1 (de) * 2004-03-31 2005-10-27 Georg Fischer Kokillenguss GmbH Kokillengiessanlage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6402596B2 (ja) * 2014-11-10 2018-10-10 宇部興産機械株式会社 鋳造装置用アタッチメント、鋳造装置、鋳造方法及び溶湯供給量調整方法
CN105499513A (zh) * 2015-12-23 2016-04-20 哈尔滨工业大学 液态充填局部加压补缩铝合金汽车轮毂制造装置及其方法
WO2022112611A1 (fr) * 2020-11-30 2022-06-02 Kurtz Gmbh & Co. Kg Moule, appareil et procédé de coulée à basse pression

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125358A (ja) * 1982-01-20 1983-07-26 Hitachi Ltd 溶湯鍛造装置
DE19807623A1 (de) * 1998-02-21 1999-08-26 Georg Fischer Disa Ag Niederdruck-Gießverfahren für Leichtmetalle, insbesondere Aluminium
DE19812068C2 (de) * 1998-03-11 2000-09-21 Gut Gieserei Umwelt Technik Gm Gießvorrichtung mit Nachverdichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004016574A1 (de) * 2004-03-31 2005-10-27 Georg Fischer Kokillenguss GmbH Kokillengiessanlage

Also Published As

Publication number Publication date
EP1222044A1 (fr) 2002-07-17
DK1222044T3 (da) 2003-11-03
DE50003308D1 (de) 2003-09-18
WO2001017714A1 (fr) 2001-03-15
ATE246975T1 (de) 2003-08-15

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