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WO2015176799A1 - Dispositif de coulée sous basse pression et procédé permettant de faire fonctionner ledit dispositif - Google Patents

Dispositif de coulée sous basse pression et procédé permettant de faire fonctionner ledit dispositif Download PDF

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Publication number
WO2015176799A1
WO2015176799A1 PCT/EP2015/000936 EP2015000936W WO2015176799A1 WO 2015176799 A1 WO2015176799 A1 WO 2015176799A1 EP 2015000936 W EP2015000936 W EP 2015000936W WO 2015176799 A1 WO2015176799 A1 WO 2015176799A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting
run
low
pressure
mold
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.)
Ceased
Application number
PCT/EP2015/000936
Other languages
German (de)
English (en)
Inventor
Siegfried Botsch
Yusuf Durak
Tilmann Haug
Timotheus Kaiser
Hermann Pfeifer
Martin SCHÖNBORN
Jörg TIMM
Karl-Ludwig Weisskopf
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Priority to CN201590000181.6U priority Critical patent/CN205834180U/zh
Priority to RS20160052U priority patent/RS1514U1/sr
Publication of WO2015176799A1 publication Critical patent/WO2015176799A1/fr
Anticipated expiration legal-status Critical
Ceased 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 low-pressure casting apparatus and a method for operating the latter, wherein the low-pressure casting apparatus comprises at least one casting mold into which a casting material can be introduced by means of gas overpressure via a casting run. Furthermore, the invention relates to a manufactured using this caster
  • the sealing plug comprises a closure body and an attached thereto
  • the stopper is formed as a ball and the guide rod is connected to the dipping into the melt area of the ball.
  • the invention has for its object to provide a comparison with the prior art improved Niederbuchg misvorraum and a method for their operation. Furthermore, the object of the invention is to provide a cast component, in particular an exhaust gas turbocharger housing, which can be produced using such a device or such a method.
  • a low-pressure casting device comprises at least one casting mold into which a casting material can be introduced by means of gas overpressure via a casting run.
  • At least one cooling module is arranged in the casting run, by means of which a casting material flowing in the casting run can be cooled such that it solidifies and the casting run is closed and / or at least one check valve is arranged in the casting run, by means of which the casting run is lowered when a gas pressure is lowered is mechanically closed.
  • the low-pressure casting device By means of the low-pressure casting device according to the invention, it is possible in a particularly advantageous manner to lower the pressure after completion of the casting mold, without the melt emerging from the casting mold and flowing back into the casting run. As a result, a process time of a casting process with mold filling against gravity can be shortened in a profitable manner: as soon as the run is closed by the cooling module or the check valve, no liquid can
  • the casting mold can therefore be decoupled from the low-pressure casting plant, and the casting plant is directly available for filling a further casting mold. In this way, unproductive non-productive times can be reduced and cast components, for example cast steel components,
  • an exothermically reacting substance or an exothermically reacting substance mixture for example a so-called blown powder in the region of filling openings of the mold and / or feeders before filling the liquid casting material; In this way, the solidification rate of the Gusswerstoffs can be reduced and thus the solidification time can be extended.
  • the exothermically reacting substance or the exothermic substance mixture is placed in a container which is destroyed in contact with the liquid casting material such that the exothermic substance or the exothermically reacting substance mixture with the molten material in the at least one Feeder and / or transported into the mold.
  • the provision of the exothermically reacting substance or substance mixture in a container enables a process-reliable placement and quantity control of the exothermically reacting substance or mixture in the region of the filling openings. In this way, the effect of the feeder can be significantly increased.
  • the substance or the mixture can be arranged in a constant and defined definable amount and concentration in the region of the filling openings, so that the process has a very low production bandwidth and error rate.
  • non-metallic inclusions in the cast body to be produced can be considerably reduced.
  • the Feiser angel is significantly increased, which also at least a reduction of shrinkage defects in the casting, ie non-metallic inclusions, can be realized. This makes it possible to reduce a volume of the feeder without losing the feeder effect.
  • cast components can be produced in a cost-effective manner with short process times, in high quality and low wall thicknesses.
  • thin-walled cast components in particular exhaust gas turbocharger housings, can be produced in this way, which at least in some areas,
  • the weight of an exhaust gas turbocharger housing produced in this way for a 4-cylinder engine is more than 30% lower than a corresponding exhaust gas turbocharger housing in conventional
  • the inventive method significantly reduces a scrap rate to less than 10% rejects compared to the typical one
  • Fig. 1 shows a schematic perspective view of an inventive
  • Fig. 2 shows a schematic perspective view of an inventive
  • Low-pressure casting device with a non-return valve arranged in a runner;
  • Fig. 3 is a schematic perspective view of one in the
  • FIG. 1 shows a low-pressure casting device 10 according to the invention.
  • the low-pressure casting apparatus 10 comprises at least one casting mold 11, the mold cavity of which is not shown in such a way that it corresponds to a mold of a cast component 40 to be produced, for example an exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44 (shown schematically in FIG. 3). Furthermore, the exhaust gas turbocharger housing 44
  • Low-pressure casting 10 in the present embodiments according to Figures 1 and 2 two runners 12 and, for example, a melting furnace thirteenth
  • An upward movement of the casting material is in this case effected against the force of gravity, preferably according to a gas pressure principle. It is envisaged that after a casting process, ie after a filling of the
  • the casting 12 is closed to prevent leakage of the casting material from the mold 11.
  • Low-pressure casting 10 as described above, two runners 12 through which the casting material is pressed by means of a gas overpressure in the mold 11.
  • a gas overpressure in the mold 11 Approximately centrally along the longitudinal extent of the runners 12, the cross section of the respective runner 12 in a section 24 is increased.
  • a cooling module 20 is arranged at this section 24 of the cross-sectional enlargement.
  • the cooling module 20 is arranged on the respective run 12, that it rests positively on the runner 12, in particular material, form and / or non-positively attached thereto.
  • the cooling module 20 is attached to the runner 12 such that it is not completely enclosed by the cooling module 20, for example.
  • a surface portion 25 of the run 12 is exposed.
  • a geometry of the cooling module 20 depends on this
  • the cooling module 20 itself is z. B. formed from a molding sand, a metal and / or a ceramic, although other materials may be suitable.
  • the cooling module 20 serves to remove the casting material flowing in the casting run 12, in particular the casting material passing through the section 24 of the cross-sectional enlargement
  • a cooling device for example a cooling device, may be provided on the cooling module 20, for example on a lower side 21 of the cooling module 20.
  • B. in the form of a cooling iron (not shown), whereby a heat transfer is accelerated.
  • a surface of the lower side 21 of the cooling module 20 corresponds to a cooling surface of the cooling device facing the underside 21.
  • a further cooling module 20 for example with a cooling device, which is particularly preferably switched on and off as required.
  • the cooling surface of the cooling module 20, which rests directly on the casting run 12, d. H. is arranged at this arcuate run, whereby a cooling of the casting material is fluidically optimized.
  • FIG. 2 shows a further possible embodiment of a device according to the invention
  • a check valve 22 in the form of a ball 23 is arranged in each of these for closing the pouring runs 12, which are illustrated transparently.
  • a geometry of the ball 23 and a geometry of the runner 12 is particularly advantageously chosen so that the ball 23 does not close the casting run 12 in the direction of flow 27 of the casting mold 1 when the gas overpressure prevails in the casting run 12.
  • an unillustrated shut-off element is provided for this purpose, which is a flow of the casting material in
  • the ball 23 as a check valve 22 in about one half of the
  • Casting 12 between, for example, furnace 13 and mold 11 is arranged.
  • the runner 12 in the region of the ball 23 has a space 26 in the form of a formation which extends to each side, d. H. in the flow direction 27 and opposite, tapered.
  • the ball 23 is arranged as a check valve 22.
  • the ball 23 is formed of metal, ceramic and / or other suitable material.
  • Casting 12 pressed, wherein at least a portion of the ball 23 closes the opening 28 and thus the runner 12 and the casting material is not from the mold 11th back into the runner 12 can flow.
  • the low-pressure casting apparatus 10, 10 ' According to the invention, it is possible in a particularly advantageous manner to lower the gas pressure after filling the casting mold 11 without the casting material flowing out of the casting mold 11, as a result of which a processing time of a casting process can be shortened. That is, the mold 11 can be removed from the low-pressure casting apparatus 10, 10 'without the
  • Casting material from the mold 1 1 flows out.
  • the low-pressure casting apparatus 10, 10 'with a further casting mold arranged thereon can for example be used immediately for the production of a further cast component.
  • FIG 3 shows a perspective view of an exhaust gas turbocharger housing 44 as an example of a cast component 40 which was produced using the low-pressure casting apparatus 10 "of FIGURE 1 or 2.
  • the exhaust gas turbocharger housing 44 is made of a cast steel and has a wall thickness 43 between 1 mm and at least in sections 3.5 mm.
  • a lost core is advantageously used, which is made in a so-called cold box process.
  • a core sand usually quartz sand
  • a binder and a hardener and cold cured and then arranged as a core in the mold.
  • Using a cast-core produced in the cold-box process is a
  • the low-pressure casting method for producing the exhaust-gas turbocharger housing 44 provides that a pressure, a temperature and / or a mold-filling speed of the
  • molten steel and / or other casting material are accurately controlled or will.
  • a laminar mold filling can be realized. This means that a molten steel is pressed into the casting mold in a main flow direction and as a result no turbulence and / or transverse flows occur in the mold cavity.
  • the exhaust gas turbocharger housing 44 can be produced in a high material quality. Furthermore, it is advantageous if the low-pressure casting process for producing the exhaust gas turbocharger housing 44 is carried out under a protective gas atmosphere.
  • the method enables the process-reliable representation of thin-walled structures of cast components 40, whereby the use of materials, in particular a material use of cost-intensive high temperature resistant materials, is reduced during manufacture. Through this reduced use of materials in the production of
  • Exhaust gas turbocharger housing 44 is a lightweight construction and associated therewith
  • the casting mold 11 is advantageously provided with feeders 50 which open into a top surface 55 of the casting tool.
  • feeders 50 which open into a top surface 55 of the casting tool.
  • two feeders 50 are indicated by dashed lines.
  • an exothermically reacting substance or an exothermically reacting substance mixture for example so-called blown powder, is introduced into the feeders 50 together with the material melt.
  • containers 53 are arranged in the region of the filling openings 51 of the feeder, which are connected to the
  • the containers 53 may, for example, be pocket-shaped or formed as a bag and completely cover the filling openings 51 of the feeders 50.
  • the containers 53 with the substance or substance mixture contained therein form so-called pads. These can be machine filled, accurately weighed and dust sealed, and transported and placed mechanically (e.g., by robots).
  • the containers 53 are formed of a material, for example paper, which is at least partially destroyed in contact with the liquid cast material such that the exothermic substance or the exothermic substance mixture with the melted material in the respective feeder 50 and / or in the mold 11 is transported.
  • the material is designed such that it dissolves without residue on contact with the molten material. That way you will be off The resulting foreign inclusions within the casting component 40 to be produced are avoided.
  • an amount of the substance or mixture arranged in the respective container 53 is variably predetermined.
  • the number of containers 53 arranged in the region of the filling openings 51 of the respective feeder 50 is set variably.
  • each feeder 50, a single container 53 is provided.
  • the application of the substance or substance like in the containers 53 allows a precise specification of the amount and concentration of the substance or mixture at the respective filling opening 51 and ensures a fate of the substance or mixture at the respective filling opening 51 until at least partial destruction of the containers 53 through the liquid casting material.
  • the containers 53 may be formed of pressed powdered exothermic reactant or composition; the substance or the substance mixture can be introduced in powder form into these pressed containers 53. This embodiment makes it possible to further reduce the risk of introducing foreign substances into the cast body 40 to be produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Supercharger (AREA)
  • Mold Materials And Core Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif de coulée sous basse pression (10) comprenant un moule (11), dans lequel un matériau de moulage peut être versé en passant par au moins un canal de coulée (12), à la suite d'une surpression de gaz. Au moins un module de refroidissement (20) est disposé dans le canal de coulée (12) et/ou sur le canal de coulée (12) et permet de refroidir un matériau de moulage s'écoulant dans le canal de coulée (12) de telle manière que ce dernier se solidifie et que le canal de coulée (12) soit obturé ; et/ou au moins un clapet anti-retour (22) est disposé dans le canal de coulée (12) et permet d'obturer mécaniquement le canal de coulée (12) lorsque la pression du gaz diminue. Ce dispositif de coulée sous basse pression (10) permet de produire des éléments à paroi mince (40, 44) de qualité élevée.
PCT/EP2015/000936 2014-05-23 2015-05-07 Dispositif de coulée sous basse pression et procédé permettant de faire fonctionner ledit dispositif Ceased WO2015176799A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201590000181.6U CN205834180U (zh) 2014-05-23 2015-05-07 低压浇铸装置和在使用低压浇铸装置的情况下制造的铸件
RS20160052U RS1514U1 (sr) 2014-05-23 2015-05-07 Uređaj za livenje pod niskim pritiskom

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410220075.0 2014-05-23
CN201410220075.0A CN105081276A (zh) 2014-05-23 2014-05-23 低压铸造装置和用于运行低压铸造装置的方法

Publications (1)

Publication Number Publication Date
WO2015176799A1 true WO2015176799A1 (fr) 2015-11-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/000936 Ceased WO2015176799A1 (fr) 2014-05-23 2015-05-07 Dispositif de coulée sous basse pression et procédé permettant de faire fonctionner ledit dispositif

Country Status (4)

Country Link
CN (2) CN105081276A (fr)
HU (2) HU4955U (fr)
RS (1) RS1514U1 (fr)
WO (1) WO2015176799A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7240579B1 (ja) 2022-06-10 2023-03-16 有限会社ファンドリーテック・コンサルティング 金属溶湯の逆流防止方法及び鋳造方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110918939B (zh) * 2019-11-28 2021-06-04 阿路米（无锡）有限公司 一种具有悬筋的铝合金产品成型模具及成型方法
CN112387955A (zh) * 2020-11-19 2021-02-23 上海镁镁合金压铸有限公司 一种用于大尺度部件的镁合金单流道浇铸设备和浇铸方法
CN117024226B (zh) * 2023-07-17 2024-12-13 西安近代化学研究所 一种粒铸推进剂浇铸液料流动控制方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009039595A1 (de) * 2009-09-01 2010-05-27 Daimler Ag Niederdruckgießvorrichtung und ein Verfahren zum Betrieb dieser

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87216623U (zh) * 1987-12-11 1988-09-07 魏永梁 套层式发热冒口套

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009039595A1 (de) * 2009-09-01 2010-05-27 Daimler Ag Niederdruckgießvorrichtung und ein Verfahren zum Betrieb dieser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7240579B1 (ja) 2022-06-10 2023-03-16 有限会社ファンドリーテック・コンサルティング 金属溶湯の逆流防止方法及び鋳造方法
JP2023181032A (ja) * 2022-06-10 2023-12-21 有限会社ファンドリーテック・コンサルティング 金属溶湯の逆流防止方法及び鋳造方法

Also Published As

Publication number Publication date
HU4956U (hu) 2019-03-28
CN105081276A (zh) 2015-11-25
CN205834180U (zh) 2016-12-28
HU4955U (hu) 2019-03-28
RS1514U1 (sr) 2017-10-31

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