WO2010078201A1 - Moulage en sable basse pression d'éléments de moteur à cylindres en alliage d'aluminium - Google Patents

Moulage en sable basse pression d'éléments de moteur à cylindres en alliage d'aluminium Download PDF

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Publication number
WO2010078201A1
WO2010078201A1 PCT/US2009/069449 US2009069449W WO2010078201A1 WO 2010078201 A1 WO2010078201 A1 WO 2010078201A1 US 2009069449 W US2009069449 W US 2009069449W WO 2010078201 A1 WO2010078201 A1 WO 2010078201A1
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WO
WIPO (PCT)
Prior art keywords
mold
pressure
furnace
low
molten metal
Prior art date
Application number
PCT/US2009/069449
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English (en)
Inventor
Brad Pickering
Rino Raffaele Trotti
Oscar Gerardo Cantu-Gonzalez
Glenn Edwin Byczynski
Original Assignee
Tenedora Nemak, S.A. De C.V.
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 Tenedora Nemak, S.A. De C.V. filed Critical Tenedora Nemak, S.A. De C.V.
Publication of WO2010078201A1 publication Critical patent/WO2010078201A1/fr

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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
    • B22D18/08—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
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
    • 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
    • B22D27/08—Shaking, vibrating, or turning of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D33/00—Equipment for handling moulds
    • B22D33/02—Turning or transposing moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel

Definitions

  • the present invention relates to the field of non-ferrous casting processes in foundries, and more particularly to an improved casting process in sand molds for manufacturing aluminum-alloy automotive parts, for example cylinder engine blocks and cylinder engine heads, and the like.
  • the invention teaches a method and apparatus for filling precision sand molds with liquid aluminum alloys utilizing a low pressure furnace and an automated casting station with advantages over the prior art in investment and operational costs and increased productivity. Background of the invention
  • Automotive and aviation motor parts made of aluminum alloys are produced in a number of casting processes and of types of molds ranging from the permanent metallic molds, semi-permanent molds and one-time usable sand molds.
  • the quality of the cast products meaning its mechanical properties and dimensional stability under all working conditions, depends on many factors which influence the final metallurgical microstructure of the casting, for example, the chemistry of the molten metal used, the type of molds and cores, the amount of inclusions and oxides occurring during the handling of the molten metal and molds pouring, the heat transfer rate and direction of cooling during solidification and subsequent cooling, as well as the heat treatment process undergone by the cast products.
  • casting soundness and machinability meaning the metal hardness and ease of machining the cast product to give precision dimensional surfaces for assembling the motor components in the block).
  • the manufacturing process comprises the following steps: preparation of sand molds and cores, assembly of sand mold packages, filling of the sand mold package with liquid metal, solidification of the liquid metal, elimination of the risers, elimination of the sand cores from the internal spaces of the cast product, and heat treatment of the cast product.
  • the present invention teaches a method and apparatus for casting aluminum cylinder engine parts which allows for combining the best features for each casting process step while more effectively automating the sand mold filling step to allow for an increased productivity of the overall casting process.
  • U.S. Patent No. 4,733,714 to Smith discloses a method of making a casting wherein molten metal is caused to flow from a molten metal furnace acting as a primary source of molten metal.
  • the molten metal is caused to flow through a heated launder system connecting through a rotary nozzle with a molten metal feeding refractory piece in communication with the mold by means of an electromagnetic pump or by pressurizing the holding furnace.
  • This patent is mute regarding the method and means for automating the system by an automatic determination of the moment when the mold is filled up with molten metal.
  • U.S. Patent No. 5,163,500 to Seaton et al. teaches a low pressure casting process wherein sand molds are filled with molten metal from a low pressure holding furnace through a launder connected to an ingate in said mold located at a side of the mold. After the mold is filled up, it is rotated 180° and disconnected from the feeding nozzle. The time for rotating the mold is determined by means of a timer or of a pressure switch in the furnace. The molds are moved into the filling and rotating station by means of pushing bars which move the empty molds from a first conveyor and displace away the molds already filled up with molten metal to a second conveyor.
  • U.S. Patent No. 5,492,165 to Erana discloses a machine for filling sand molds with non-ferrous metals using a low pressure technique wherein a vacuum is applied to the mold [7219 55 .DOC]
  • a level sensor located in the molten metal feeding furnace is used for determining that the mold has been filled up.
  • This patent teaches feeding the mold through an opening in the bottom part thereof and relies on refrigerating the nozzle connecting to the mold ingate for creating a solid plug in the mold before disconnecting the mold from the nozzle.
  • U.S. Patent No. 6,540,007 to Meyer discloses a process for molding a casting made of a light alloy wherein a sand mold is rotated 180°. Before disconnecting the mold from the metal feeding nozzle, the mold ingate is mechanically sealed by means of a suitable metal plate or with a sand plug. This mechanical closure of the mold adds complexity and increases costs and time to the casting process.
  • U.S. Patent Application No. 2004/0050525 Al discloses a process and apparatus for discharging a dose of molten metal from a pressure pouring furnace into casting molds.
  • the control of the molten metal feed to the pressure furnace is made by means of a level sensor in the pressure furnace which emits a signal for actuating to seat or unseat a plunger and sealing plate combination which is located in the wall separating a heating chamber from the pressure chamber of the furnace.
  • Kennedy teaches using the differential pressure measured before and after dosing the molten metal for an accurate control of the quantity to the mold. An algorithm for the relationship between this differential pressure for each type of mold has to be developed and applied.
  • PCT International Application Publication No. WO 2007/079482 teaches a metal casting system using an engineered sand mold without conventional gating design and which utilizes a vacuum pressure for causing the molten metal to fill up the mold.
  • the sand mold is encapsulated for allowing the vacuum negative pressure to raise the molten metal into the mold cavity.
  • This publication does not include any reference to method and means for determining the moment when the mold is full and does not mention rotation of the mold. [7219 55 .DOC]
  • DE OS 196 49 014 Al teaches a mold design which is fed with molten metal against gravity from a low pressure furnace through an inclined launder through an ingate located laterally in said mold.
  • the ingate channel is built inside the mold also inclined with respect to the horizontal to prevent the molten metal to flow back to the feeding furnace when the mold is rotated 180°.
  • the inclined design of the feeding channel inside the mold adds unnecessary complexity to the manufacture of the molds.
  • This patent publication does not teach any method or means for automating the casting operation by a suitable determination of the moment when the mold is filled up with molten metal.
  • this patent teaches that the filled molds each remain in their respective casting station for cooling; thus lowering the productivity of the casting stations (which are mounted in a rotary platform) with the consequent disadvantages of (1) a low productivity of the whole set of stations when one of the stations requires maintenance and (2) the operational cost of continuously moving the rotary platform.
  • Objects of the invention It is therefore an object of the present invention to provide an automated low-pressure sand casting process for manufacturing high-quality aluminum-alloys cylinder engine parts at low cost and increased productivity.
  • the objects of the invention are generally achieved by providing an apparatus for casting cylinder engine parts of aluminum alloys comprising a molten metal holding furnace; a low-pressure mold feeding furnace; a conduit communicating said metal holding furnace [72195 5 .DOC]
  • FIG. 1 is a diagrammatic representation of a casting installation according to the present invention using one mold-handling robot for production of high quality cylinder engine parts with increased productivity.
  • Figure 2 is a diagrammatic representation of a casting installation according to the present invention similar to that shown in Figure 1, using two mold-handling robots.
  • Figure 3 is a diagrammatic representation of a casting station according to the present invention. Detailed description of some preferred embodiments
  • the preferred type of molds and cores are those made from silica sand which provide good precision dimensions and low cost for massive production of cylinder engine blocks and heads.
  • the sand cores preferably use a water-soluble binder which may be organic (e.g. based on starch) or inorganic (e.g. based on sodium silicate and sodium phosphate).
  • a water-soluble binder which may be organic (e.g. based on starch) or inorganic (e.g. based on sodium silicate and sodium phosphate).
  • organic e.g. based on starch
  • inorganic e.g. based on sodium silicate and sodium phosphate
  • a metallic chill forming part of the mold is preferably used as a heat sink for setting a direction of the solidification process.
  • the chill is located opposite to the riser section of the mold, so that liquid molten metal feeds the mold cavity during the solidification stage that starts in the sections of the mold where molten metal has contact with said chill.
  • the invention is also fully applicable to sand molds without metallic chills.
  • the preferred pouring process is a low-pressure feed of molten metal against gravity which provides a quiescent (non-turbulent) flow preventing the formation of bubbles and inclusions.
  • the molten metal and pressure furnace vessels are covered and a non-oxidizing gas is used as a source of pressure in order to prevent oxidation of the aluminum alloys.
  • the level of the mold feeding furnace is automatically replenished at each pouring cycle by the action of a ceramic plunger valve which allows molten metal to flow into the pressure pouring furnace from the holding furnace just by the level equalization when the plunger (or graphite plug) valve communicates between both furnaces.
  • a heated launder system connected between the pressure pouring furnace and the mold is designed having an upward inclination with respect to the horizontal direction of feeding flow (preferably about 10°) for causing molten metal in the launder to return to the pouring furnace by gravity when the pressure in said pouring furnace is relieved after the mold is filled up.
  • This feature of the launder avoids the need of separate shutting off devices or complex anti-spill nozzles and special gating and riser designs.
  • the feeding nozzle has a non-spill sealing spherical design which permits the rotation of the filled-up mold about a horizontal axis passing through the mold's molten metal feeding inlet, while the higher pressure of the pouring furnace is maintained on the mold.
  • a sensor mounted on the casting station sends a signal to a PLC controller which then acts on the mold rollover motor whereupon the sand mold at the station is inverted about 180°, so that the solidification starts in the lower part of the mold where the chill is located and the metal shrinkage draws more liquid metal from the upper riser section of the mold, favorably flowing downwardly in the direction of gravity.
  • the pressure exerted in the pouring furnace by a non-oxidizing gas (usually nitrogen) is maintained during rotation of the mold to assure that the liquid aluminum fills all the spaces in the mold complex and thin-walled geometry.
  • the use of a plurality of casting stations and of robots permits the retention of the mold in its casting station during initial cooling.
  • the sand cores and chill are removed from the mold at a recovery position, and the cast product may be cooled down by a water mist and/or further subjected to the predetermined heat treatment to obtain the desired mechanical properties and overall quality.
  • sand molds 10 having an integrated chill 12 are transported by a conveyor belt 14 up to a point where a robot 13 having arm 16 and mold handling means 18 places a mold 10 in a casting station 20 where the mold is fixed to the casting station frame 23 by means of suitable holders 21.
  • the sand molds 10 are filled with molten aluminum alloy from a low pressure furnace 22 through a heated launder 24 that has an upward slant with respect to the horizontal feed direction (typically 10°).
  • This inclination of launder 24 assures that liquid aluminum in the launder flows back down and returns to the low pressure furnace 22 when the mold 10 has been filled and rolled over, and the pressure in furnace 22 has been released or sufficiently decreased to avoid spilling liquid aluminum upon disengagement of the launder from the mold.
  • the casting station 20 rotates 180° about an axis 30 passing through the ingate 25 of said mold while the pressure of molten metal is maintained.
  • the casting station 20 may rotate in one direction only or can be designed to have a reciprocal motion.
  • the fixture clamps 21 and fill probe 26 are retracted so that the mold 10 can be extracted from the casting station automatically.
  • the chill 12 is in the lower position of the mold (as illustrated in dash-dot outline in Figure 3).
  • Robot 13 may move the inverted mold 10 from the casting station 20 to a cooling position (not shown in Figures 1 or 3, for simplicity of illustration), where the molten metal is cooled down and solidified. If the process involves the use of an integral bulkhead chill 12, sufficient time will be allowed for the mold 10 to cool to permit safe removal of the chill 12 from the casting 60. Thereafter, molds 10 are placed in a recovery station 58; where the chills, sand molds and cores are removed, and cast products 60 are then transported away by means of conveyor 62 for further processing.
  • Molten metal for example aluminum alloys
  • melting furnace 54 having an opening 55 for charging aluminum scrap and ingots as well as the necessary alloying [7219 55 .DOC]
  • molten aluminum is transferred from melting furnace 54 to holding furnace 52 via conduit 59.
  • Holding furnace 52 provides a source of molten metal for replenishing the level of molten metal in low pressure furnace 22.
  • a suitable valve 51 is used for allowing molten metal to refill pressure furnace 22 via conduit 57 after each mold filling operation. Valve 51 also seals the inner space of low pressure furnace 22; so that the pressurizing gas holds the desired pressure level for causing the molten metal to flow into the mold.
  • the casting After the mold filling and inversion, the casting is consequently oriented so that the risers are upright thus providing a gravity feed of molten metal to the casting as it solidifies.
  • the casting station 20 may be loaded and unloaded with molds 10 by any suitable mechanical means including but not limited to a gantry, robot or conveyor.
  • Figure 2 shows the casting installation of Figure 1 modified to use two mold handling robots: 13 and 15.
  • Robot 13 handles the empty molds 10 from conveyor 14 and positions said molds into one of the casting stations 41, 43, 45 or 46 mounted on a rotary turntable 48.
  • Robot 15 takes filled molds 10 from such stations and places them in a recovery station 58 where the metallic chill, the sand molds and cores are removed and cast products 60 are then transported away by means of conveyor 62 for further processing.
  • Rotary turntable 48 may include a plurality of casting stations (other than four) as may best fit for the particular design of a casting installation, presenting the advantage of providing a time for solidification of the liquid aluminum after molds roll-over while other molds are being filled.
  • the precision sand mold 10 is placed (automatically) by a robot 13 into the casting station 20. Clamping means 21 are activated, and launder 24 is advanced into the precision sand core package 10.
  • the precision sand core package 10 will be positioned so that the runner and risers are filled before the rest of the sand mold package.
  • a fill probe 26 mounted on the casting station 20 detects and emits a signal 27 to programmable controller 32 when the mold is full, which in turn sends signal 29 to motor means 28 triggering rotation of the casting station 20 about a horizontal axis 30 preferably passing through the ingate 25 of mold 10.
  • Launder 24 remains connected to mold 10, and therefore mold pressure is maintained during the rotation process.
  • the launder comprises a ceramic tube as well as a ceramic nozzle and has a rotary tip connecting with the ingate 25 of [721955.DOC]
  • Launder 24 is also capable of fine adjustment when it is located against the ingate port of the mold.
  • the pouring launder 24 has a unique ceramic elbow design which has an access port on top for ease of cleaning and also acts as a trap for oxides, preventing them from entering the mold during pouring.
  • Pressure furnace 22 has a gas inlet pipe 40 provided with valve 36 allowing communication with a gas, for example nitrogen (though other inert gases also may be used for example: argon, helium or other inert gases), for pressurizing furnace 22 and causing molten aluminum to flow upwardly through launder 24 as a quiescent flow without turbulence to fill the mold 10.
  • a gas for example nitrogen (though other inert gases also may be used for example: argon, helium or other inert gases), for pressurizing furnace 22 and causing molten aluminum to flow upwardly through launder 24 as a quiescent flow without turbulence to fill the mold 10.
  • controller 32 sends a signal 31 to controller 34 to release the pressure on the low pressure furnace 22 by opening valve 42 on the gas outlet 44. Controller 32 then signals robot 13 which removes sand mold 10 from casting station 20 (in the embodiment shown in Figure 1), or from the corresponding casting station 43 of turntable 48 (shown in Figure 2), and places it on a recovery station 58 where the metallic chill, the sand molds and cores are removed from the casting.
  • controller 34 Upon removal of sand mold 10 from casting station 20, controller 34 sends signal 33 to open valve 51 to allow molten aluminum to flow from holding furnace 52 to low pressure furnace 22 to recover the level of liquid aluminum in said low pressure furnace 22.
  • Molten aluminum furnace 52 is larger than said low pressure furnace 22 so that the level in furnace 22 is recovered by just opening valve 51, thus dispensing with the use of a pumping means for transferring the liquid aluminum.
  • Aluminum make-up to furnace 52 may be similarly carried out by transfer means known in the art. This arrangement of furnaces provide a casting system of improved productivity while maintaining a high quality control of the molten aluminum by placing filters 56 in conduits 57 and 59.
  • the mold is filled with the runner and risers in the downward position.
  • Mold 10 may or may not include an integral metallic chill or smaller localized chills to cool the casting bulkheads rapidly during the casting process.
  • Probe 26 in one preferred embodiment has an electricity conducting bar76 which may be inserted and retracted through a suitable opening in the sand mold, for example by means [721955 DOC]
  • Probe 26 can also be any one of a number of sensing devices, such as a capacitive sensor, an eddy current probe, or a laser level sensor, depending on the core package design.
  • the sand mold package may be designed; so that it will have a clearance or an opening for the metal sensing device to detect the level of molten metal inside said mold.
  • a predetermined mold filling profile is developed for each specific product being produced.
  • the actual filling flow of the metal is controlled by a feedback signal 37 from a transducer 39 that detects the level of pressure in the low pressure furnace 22.
  • This signal 37 is compared with the predetermined filling profile by controller 34 to make fine adjustments to valves 36 and 42 thus compensating for any shortfall or excess of pressure in the furnace during the pouring process.
  • the system also allows the operator to set one or more pressure levels over discrete time periods during a mold fill profile according to mold configurations and the remaining amount of melt in the pressure chamber.
  • the furnace 22 is pressurized using nitrogen, so that molten aluminum flows through launder 24 and into the precision sand core package in a quiescent manner.
  • a signal 37 from pressure transducer 39 that is mounted on the low pressure furnace is taken by controller 34 for actuating on valve 36 through signal 72 and/or valve 42 through signal 74 so that any loss or surplus of pressure in the furnace 22 is carefully controlled during the pouring process.
  • Transducer 39, along with controller 34 allow the system to automatically compensate for any pressure leaks that may exist in the system and permit a very fine control of the internal pressure in the furnace 22.
  • the system of the invention has both the ability to inject and release gas during the mold's filling process.
  • valve 36 opens to inject nitrogen into the furnace 22, and the pressure inside the furnace is actually 3.2psi, the system acts on valve 42 and releases pressure in order to bring back the furnace to the 3.0 psi level.
  • the fill probe 26 detects that the mold is full, it triggers the PLC controller to rollover the casting station 20 for 180° while the furnace holds a constant mold pressure to maintain head height preventing any fluctuation in mold pressure. [7219 55 .DOC]
  • a casting system and method having an increased productivity through an automatic operation.
  • a method and apparatus are provided for controlling the filling up of molds with liquid aluminum alloys utilizing a set of three pressure transducers in a low-pressure casting system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention porte sur un procédé et sur un appareil de remplissage de précision de moules en sable par des alliages d'aluminium liquide en utilisant un four basse pression et un poste de moulage automatisé, tel qu'un appareil de fabrication d'éléments de moteur en alliage d'aluminium dans des moules en sable comportant un orifice de remplissage, comprenant en association, un four de maintien du métal fondu; un four d'alimentation des moules à basse pression; un conduit faisant communiquer ledit four de maintien de métal et ledit four à basse pression, des moyens de vannes destinés à commander l'écoulement par gravité du métal fondu dudit four de maintien audit four à basse pression; un moyen de positionnement et d'extraction robotisé; un moyen de table de coulée pour remplissage des moules destinée à recevoir et bloquer un moule en sable positionné robotiquement dans celui-ci dans une orientation de remplissage et pour retourner ledit moule lorsqu'il est rempli de métal fondu; un chenal de coulée chauffé reliant ledit four à basse pression et ledit moule au moyen d'un orifice de remplissage durant le remplissage et le retournement; un dispositif de détection disposé sur ladite table de coulée pour envoyer un signal lors de la détection de ce qu'un moule à sable est rempli de métal fondu; et un dispositif de commande programmable agissant sur ladite table de coulée en réponse à un signal provenant dudit dispositif de détection afin de retourner le moule rempli de métal fondu.
PCT/US2009/069449 2008-12-31 2009-12-23 Moulage en sable basse pression d'éléments de moteur à cylindres en alliage d'aluminium WO2010078201A1 (fr)

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US14209308P 2008-12-31 2008-12-31
US61/142,093 2008-12-31

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052450A (zh) * 2010-10-27 2011-05-11 天津市奥亚机电有限公司 用铝合金铸造混凝土泵车分动箱壳体的工艺
CN103357821A (zh) * 2013-07-26 2013-10-23 广西玉林玉柴机器配件制造有限公司 用铁型覆砂铸造箱式复杂水冷排气管的方法
CN108526439A (zh) * 2018-06-25 2018-09-14 溧阳市联华机械制造有限公司 一种真空吸铸内浇道快速凝固的壳型结构
DE102019126108A1 (de) * 2019-09-27 2021-04-01 Grohe Ag Vorrichtung zum Niederdruckgießen von Werkstücken mit einer schwenkbaren Kupplung

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WO2007079482A2 (fr) 2006-01-03 2007-07-12 Adolf Hetke Systeme de coulee de metal, moule usine, procede et objets fabriques selon le procede
WO2008132991A1 (fr) * 2007-04-16 2008-11-06 Sintokogio, Ltd. Appareil de coulage basse pression, procédé de remplissage de gaz inerte et procédé de fabrication d'article coulé

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JPS5935874A (ja) * 1982-08-24 1984-02-27 Toyota Motor Corp 低圧鋳造方法
US4733714A (en) 1986-02-21 1988-03-29 Cosworth Research & Development Limited Method of and apparatus for casting
US5163500A (en) 1991-12-13 1992-11-17 Ford Motor Company Rollover method for metal casting
US5492165A (en) 1992-11-20 1996-02-20 Erana; Agustin A. Machine for filling sand moulds with non-ferrous metals using a low pressure technique
US5725043A (en) 1993-07-02 1998-03-10 Frank W. Schaefer, Inc. Low pressure casting process and apparatus
US6247521B1 (en) * 1996-08-15 2001-06-19 Toyota Jidosha Kabushiki Kaisha Pressure difference control method for filling a cavity with melt
DE19649014A1 (de) 1996-11-27 1998-05-28 Ks Aluminium Technologie Ag Verfahren und Vorrichtung zum Herstellen von Gußstücken
EP0979696A1 (fr) * 1997-12-08 2000-02-16 Nippon Steel Corporation Appareil de moulage en continu a jauge de niveau du metal
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EP0995523A1 (fr) * 1998-10-23 2000-04-26 Alusuisse Technology & Management AG Installation de coulée continue verticale avec mesure optimisée du niveau de métal liquide
WO2000044516A1 (fr) * 1999-01-28 2000-08-03 Disa Industries A/S Procede et appareil de moulage
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WO2007079482A2 (fr) 2006-01-03 2007-07-12 Adolf Hetke Systeme de coulee de metal, moule usine, procede et objets fabriques selon le procede
WO2008132991A1 (fr) * 2007-04-16 2008-11-06 Sintokogio, Ltd. Appareil de coulage basse pression, procédé de remplissage de gaz inerte et procédé de fabrication d'article coulé
US20100108285A1 (en) * 2007-04-16 2010-05-06 Shinya Mizuno Device for low-pressure casting, a method for filling inert gas in the device, and method for producing a cast

Cited By (4)

* Cited by examiner, † Cited by third party
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CN102052450A (zh) * 2010-10-27 2011-05-11 天津市奥亚机电有限公司 用铝合金铸造混凝土泵车分动箱壳体的工艺
CN103357821A (zh) * 2013-07-26 2013-10-23 广西玉林玉柴机器配件制造有限公司 用铁型覆砂铸造箱式复杂水冷排气管的方法
CN108526439A (zh) * 2018-06-25 2018-09-14 溧阳市联华机械制造有限公司 一种真空吸铸内浇道快速凝固的壳型结构
DE102019126108A1 (de) * 2019-09-27 2021-04-01 Grohe Ag Vorrichtung zum Niederdruckgießen von Werkstücken mit einer schwenkbaren Kupplung

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