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WO2008034436A1 - Dispositif de coulée pour la fabrication de structures de mousse à pores ouverts à partir de métal, d'alliages métalliques, de matière plastique ou de céramique avec ou sans enveloppe extérieure fermée - Google Patents

Dispositif de coulée pour la fabrication de structures de mousse à pores ouverts à partir de métal, d'alliages métalliques, de matière plastique ou de céramique avec ou sans enveloppe extérieure fermée Download PDF

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Publication number
WO2008034436A1
WO2008034436A1 PCT/DE2007/001708 DE2007001708W WO2008034436A1 WO 2008034436 A1 WO2008034436 A1 WO 2008034436A1 DE 2007001708 W DE2007001708 W DE 2007001708W WO 2008034436 A1 WO2008034436 A1 WO 2008034436A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting device
vacuum
mold
casting
core stack
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/DE2007/001708
Other languages
German (de)
English (en)
Inventor
Raimund Strub
Ulrich Munz
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.)
Kurtz GmbH
Original Assignee
Kurtz 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 Kurtz GmbH filed Critical Kurtz GmbH
Publication of WO2008034436A1 publication Critical patent/WO2008034436A1/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
    • 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
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/005—Casting metal foams

Definitions

  • Casting device for producing open-pored foam structures made of metal, metal alloys, plastic or ceramic with or without closed outer shell
  • the invention relates to a casting device for producing open-pore foam structures made of metal, metal alloys, plastic or ceramic with or without a closed outer shell according to the teaching of patent claim 1.
  • Casting devices are known from the prior art, the pourable material, such as metal, metal alloys, plastic or ceramic, with suitable blowing agents, such as gases in the liquid state, foam to produce open-pore components, which have a low density and high strength.
  • suitable blowing agents such as gases in the liquid state
  • foam to produce open-pore components, which have a low density and high strength.
  • a disadvantage of the components that emerge from the known casting devices is that the introduced gas bubbles arise very uncontrolled and reach different, not clearly defined sizes. Furthermore, there is the problem that the injected gases cause bubbles to rise to the surface of the components, so that no closed outer skin of defined thickness can be produced.
  • the mechanical properties of the components produced by the known casting devices are difficult to predict and adjustable, and the formation of a closed outer skin of defined thickness is difficult or impossible.
  • the object of the present invention to provide a casting device, which has the goal to produce open-pore foam structures made of metal, metal alloys, plastic or ceramic, which may have a closed outer shell of defined thickness, if necessary. Furthermore, it is an object of this invention to equip the casting device with as many components of known casting devices as possible, so that a simple and cost-effective possibility is provided to convert existing casting devices for the production of such open-pored foam structures.
  • the casting device is embodied in a vacuum-tight manner and comprises a casting mold, a machine control, a vacuum station, a printing station as well as pressure control means, inflow and fill control means and vacuum control means.
  • the casting machine is designed as a low-pressure casting machine, which presses with the aid of an adjustable control pressure, which is generated by a printing station and can be passed by means of pressure control means in an oven, a liquid melt in a mold. The flow rate of the melt and the amount of inflowing material into the mold can be controlled by the inflow and fill control means.
  • a vacuum generated by a vacuum station and controlled by means of vacuum control means By means of a vacuum generated by a vacuum station and controlled by means of vacuum control means, on the one hand, evolved gases are withdrawn from the casting mold and the furnace, and on the other hand a very fine regulation of the height of the melt in the casting mold is achieved made so that the quality of the casting process, in particular the filling of very fine structures of the present in the form of a core stack Gussinnenform can be adjusted.
  • the volume of the vacuum station must be designed so that all of the core gases and other gaseous substances produced during the casting process are sucked out of the mold within a very short time.
  • the machine control makes it possible to freely select the filling pressure, filling speed, switching on and off the vacuum and holding pressure in the production of the foam structure and the outer component shell in any desired stages.
  • the machine controller controls and controls the vacuum station, the printing station, and operates the pressure regulating means, inflow and fill control means, and the vacuum control means.
  • the casting apparatus further comprises vacuum switching means, by means of which a mutually switchable vacuum in the furnace and the casting mold can be controlled.
  • the vacuum system includes vacuum switching means which can optionally create a vacuum in the oven or mold so that the two vacuums can be meaningfully controlled against each other to provide desired pouring characteristics of the pouring apparatus.
  • vacuum switching means may be embodied, for example, in the form of vacuum valves, throttle valves and the like.
  • the feeding of the liquid melt into the casting mold of the casting device can be carried out as desired.
  • the casting device can be connected in a vacuum-tight manner to a replaceable oven.
  • a casting furnace which heats the material to melting temperature, can be used for any purpose and only has to have a vacuum-tight connection flange for connection to the casting device according to the invention, through which the liquid melt can pass from the furnace into the casting mold.
  • the casting device itself may comprise an oven.
  • the furnace is a part of the casting apparatus and can be adapted to the desired requirements of the production of the open-pored foam structures.
  • the melt can be introduced from the furnace in any way in the mold.
  • the liquid melt can flow into the casting mold at one or more points via a ceramic-lined distributor box by means of a ceramic-lined filler neck.
  • the distributor box enables the homogeneous distribution of the melt at the various inlet points.
  • These inlet points of the liquid melt into the casting mold are provided as ceramic filler neck and ensure that all areas of the mold are equally filled with liquid melt and thus a homogeneous material distribution and a uniform solidification of the component is possible.
  • the liquid melt can advantageously also pass directly from the furnace via riser pipes into the casting mold.
  • Direct delivery from the furnace via risers into the mold eliminates the need for additional components, such as the manifold box and filler neck, and allows the metering process to be more accurately metered by controlling the pressure and vacuum conditions in the mold and in the riser tubes.
  • An embodiment of the invention provides that the vacuum station generates at least one specific, predetermined vacuum pressure, In order to suck all formed during the casting process core gases and other gaseous substances within a very short time from the mold.
  • the vacuum station must be able to produce a pre-definable vacuum pressure dependent on the size of the furnace and the mold, which ensures that all gases that can negatively affect the quality of the castings are reliably sucked off, so that the liquid melt securely covers all areas of the casting mold and can fill evenly.
  • the vacuum station ensures by a minimum vacuum pressure that the melt also in the finest areas of the casting mold, for example. is built up in the form of a core stack consisting of individual core bodies, flows in and reliably fills all intermediate spaces.
  • the casting mold comprises holding and fixing means for holding and fixing a casting mold, for example a core stack, wherein the core stack consists of individual core bodies connected to each other, so that the holding and fixing means defines one Positioning of the core stack inside the mold and ensure a defined distance of the core stack from the inner wall of the mold.
  • the core stack which is necessary to ensure the open-pore structure of the cast component, is held in a defined position within the mold and thus ensures the uniform and defined distribution of the pores within the component.
  • a defined gap between G manforminnenwand and core stack can be created, which ensures that a desired outer skin of defined thickness can be poured.
  • areas which are filled up completely by the melt can be created at defined positions, for example to create a solid core of a component or certain to achieve desired density changes of the component at fixed positions.
  • the casting device within the casting mold further holding and fixing means for holding and fixing prefabricated component components, in particular cooling channel structures or connection structures, which are poured through the liquid melt in the component or molded onto the component can be.
  • additional holding and fixing means certain component components, such as cooling channel structures, e.g. Cooling coils, or connection structures, e.g. Inject flanges, distributors or other liquid or gas directing means directly into the component.
  • cooling channel structures e.g. Cooling coils
  • connection structures e.g. Inject flanges, distributors or other liquid or gas directing means directly into the component.
  • Due to the large surface area of open-pore structures these are particularly suitable as heat exchangers, for example in use in refrigeration or air conditioning systems or in vehicle construction. Defined throughflow paths for liquids or gases, which are to be cooled or heated, must be created within these components.
  • flow-through channels can already be prefabricated in the form of cooling coils and poured directly into the open-pored component. For this purpose, however, they must be fixed in a defined position within the mold. With the help of such fixing and holding means which are mounted in the mold, they can be in a defined position within the core stack in the mold attach and fix and are poured in the course of the casting together with the core stack, so that a complete radiator or heating structure with prefabricated flow channels results.
  • Such cast guide structures have an optimal heat exchange coefficient with the open-pored component and thus achieve an optimal effect of the heat exchanger.
  • the pouring device may include a heater for heating the core stack, the heated the core stack to oven temperature to ensure the flowability of the melt in the core stack. This can be realized, for example, by heating the casting mold with inserted core stack to oven temperature, so that the liquid melt retains its viscosity as it flows into the casting mold and thus can fill out the smallest area within the core stack.
  • the casting device comprises a flushing device and / or a vibration device which removes the core stack material from the component by flushing with water and / or by vibration.
  • the core stack is poured through the material.
  • the core stack material must then be removed from the component to create the open-pore structure. This is particularly simple after hardening of the melt by vibration of the component or by flushing with water, so that the core stack material is removed from the component.
  • at least one side of the component is generated without outer skin, or it can be subsequently opened again the outer skin at a suitable location, so that the core stack material can be removed without residue.
  • the core stack is a simple coherent structure, so that all the core body of the core stack are connected to each other.
  • a single point at which the core stack material can be flushed out is sufficient since all of the core bodies are interconnected and thus there is always a way to remove all of the core stack material from all areas of the component from a single location.
  • the foam structures can be made in any size and dimension.
  • spiral tubes, pipes or Similar to the production of heat exchangers are poured directly.
  • the surrounding shell of the show structure can be produced in any size and dimension, in particular, even very small wall thicknesses can be performed to a minimum of 0.5 mm.
  • the surrounding sheath can be manufactured in such quality and quality that it can be used predictably even in areas of safety-relevant parts.
  • the filling of the mold and extraction of gases is possible by combining oppositely connected vacuum in the furnace and casting mold and can be controlled by a freely adjustable emphasis.
  • the vacuum-tight casting mold and the vacuum-tight oven can be provided with an overpressure control.
  • Fig. 1 in a schematic representation of an embodiment of the casting apparatus.
  • FIG. 1 an embodiment of a pouring device 01 is shown schematically.
  • the casting apparatus 01 comprises a mold 09, a machine control, which is not shown, a vacuum station 03, a printing station 04 and pressure control means 06, inflow and fill control means 08 and vacuum control and switching means 05.
  • a furnace 02 the casting material becomes a liquid Melt 07 heated, which is shown hatched. This liquid melt 07 passes through a riser 17 into the mold 09.
  • Furnace 02, mold 09 and other components of the casting apparatus 01 are vacuum-tightly connected to each other by means of vacuum seals 18.
  • the mold 09 is divided by a mold parting line 12 into two parts, the upper mold 10 and the lower mold 1 1.
  • a G tellformhebe- / - lowering device 13 is provided, the upper Mold 10 can lift off the lower mold 1 1 at the mold parting line 12.
  • the vacuum station 03 generates a vacuum that, controlled by the vacuum control and switching means 05 via a G demvakuumab Entry 14 can generate a vacuum in the mold 09.
  • a vacuum, controlled by the vacuum control and switching means 05 can be generated inside the furnace 07, which is discharged through a kiln vacuum exhaust 15. With the help of the vacuum station 03, all the core gases and other gaseous substances produced during the casting process are sucked out of the casting mold 09 and / or also out of the furnace 02 within the shortest possible time.
  • a printing station 04 is arranged. This generates a pressure which is introduced via a furnace pressure supply 16 into the furnace in order to pressurize the liquid melt 07, so that the liquid melt 07 in the riser 17 can rise into the casting mold 09.
  • the pressure generated in the furnace 02 can be controlled by the
  • Pressure control 06 can be adjusted. With the help of Grezierstoffn 08, the inflow velocity and the filling amount of the melt 07, which penetrates into the mold 09, can be regulated.
  • the low-pressure casting machine works as follows:
  • the liquid melt 07 increases through freely selectable parameters with respect to pressure, vacuum and speed, which can be adjusted via the pressure control means 06, vacuum control means 05, inflow and fill control means 08, via the riser 17 to the mold 09 on ,
  • At a separately determined for each component time is adjustable according to the height and flow rate vacuum, which is generated by the vacuum station 03, switched on.
  • the filling of the core stack to produce the foam structure is carried out under vacuum until a time specified for the component.
  • the vacuum of the vacuum station 03 is switched off again by the vacuum control means 05, and the further mold filling and recompression takes place via freely selectable parameters with regard to filling speed and filling pressure, which are regulated by the filling control means.
  • tel 08 and pressure control means 06 of the printing station 04 can be adjusted.

Landscapes

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

Abstract

L'invention concerne un dispositif de coulée pour la fabrication de structures de mousse à pores ouverts à partir de métal, d'alliages métalliques, de matière plastique ou de céramique avec ou sans enveloppe extérieure fermée. Pour cela, le dispositif de coulée (01) est réalisé de manière étanche au vide et comprend un moule (09), un contrôleur de machine, une station de vide (03), une station de compression (04) ainsi que des moyens de régulation de la pression (06), des moyens de régulation de l'admission et du remplissage (08) et des moyens de régulation du vide (05). À l'aide du dispositif de coulée selon l'invention, des composants quelconques ayant une structure de mousse à pores ouverts peuvent être fabriquées à partir d'un matériau apte à la coulée, qui présente une taille de pore définie et au besoin une épaisseur de paroi extérieure définie, et se caractérise par une solidité et une rigidité élevées ainsi que par une masse volumique basse et un faible poids intrinsèque.
PCT/DE2007/001708 2006-09-22 2007-09-24 Dispositif de coulée pour la fabrication de structures de mousse à pores ouverts à partir de métal, d'alliages métalliques, de matière plastique ou de céramique avec ou sans enveloppe extérieure fermée Ceased WO2008034436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006045267.4 2006-09-22
DE200610045267 DE102006045267A1 (de) 2006-09-22 2006-09-22 Gießvorrichtung zur Herstellung offenporiger Schaumstrukturen aus Metall, Metalllegierungen, Kunststoff oder Keramik mit oder ohne geschlossene Außenhülle

Publications (1)

Publication Number Publication Date
WO2008034436A1 true WO2008034436A1 (fr) 2008-03-27

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ID=38776269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/001708 Ceased WO2008034436A1 (fr) 2006-09-22 2007-09-24 Dispositif de coulée pour la fabrication de structures de mousse à pores ouverts à partir de métal, d'alliages métalliques, de matière plastique ou de céramique avec ou sans enveloppe extérieure fermée

Country Status (2)

Country Link
DE (1) DE102006045267A1 (fr)
WO (1) WO2008034436A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109622922A (zh) * 2019-01-31 2019-04-16 重庆长安汽车股份有限公司 一种铸造装置
CN119426558A (zh) * 2024-11-05 2025-02-14 宁国桑尼泰克精密铝制品有限公司 一种轻量化铝合金铸件低压成型装置及操作工艺

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109482842B (zh) * 2018-12-07 2020-11-03 中国兵器科学研究院宁波分院 一种钢-铝复合结构铝合金主动轮总成毛坯的差压铸造方法
CN109930152B (zh) * 2019-04-04 2020-04-28 燕山大学 一种竖直式复合坯料层间真空涂镍装置及真空涂镍方法
DE102019003706A1 (de) * 2019-05-27 2020-12-03 Abp Induction Systems Gmbh Schmelz- und Gießverfahren und kombinierte Schmelz- und Gießofenanlage
DE102021131241A1 (de) 2021-11-29 2023-06-01 Ronal Ag Kokille, Vorrichtung und Verfahren zum Niederdruckgießen

Citations (5)

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Publication number Priority date Publication date Assignee Title
GB1379157A (en) * 1971-04-19 1975-01-02 Kureha Chemical Ind Co Ltd Process for the production of composite porous materials
DE4326982C1 (de) * 1993-08-11 1995-02-09 Alcan Gmbh Verfahren und Vorrichtung zur Herstellung von Formteilen aus Metallschaum
EP1354651A2 (fr) * 2002-04-19 2003-10-22 Hütte Klein-Reichenbach Gesellschaft m.b.H. Elément de construction allégé comprenant une mousse métallique ainsi que procédé et installation pour sa fabrication
WO2006021082A1 (fr) * 2004-08-24 2006-03-02 Cymat Corp. Appareil de coulage de mousse métallique et procédés idoines
EP1417063B1 (fr) * 2001-08-17 2006-03-22 Cymat Corp. Procede de moulage de mousse de metal a basse pression

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
FR2705044B1 (fr) * 1993-05-10 1995-08-04 Merrien Pierre Procede de coulee pilotee sous basse pression d'un moule sous vide pour alliages d'aluminium ou de magnesium et dispositif pour sa mise en oeuvre.
FR2773337B1 (fr) * 1998-01-07 2000-02-11 Seva Procede et installation de coulee sous basse pression dans un moule a coquille ceramique
DE19851250C2 (de) * 1998-11-06 2002-07-11 Ip & P Innovative Produkte Und Verfahren zum Herstellen offenporiger, metallischer Gitterstrukturen und Verbundgussteile sowie Verwendung derselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1379157A (en) * 1971-04-19 1975-01-02 Kureha Chemical Ind Co Ltd Process for the production of composite porous materials
DE4326982C1 (de) * 1993-08-11 1995-02-09 Alcan Gmbh Verfahren und Vorrichtung zur Herstellung von Formteilen aus Metallschaum
EP1417063B1 (fr) * 2001-08-17 2006-03-22 Cymat Corp. Procede de moulage de mousse de metal a basse pression
EP1354651A2 (fr) * 2002-04-19 2003-10-22 Hütte Klein-Reichenbach Gesellschaft m.b.H. Elément de construction allégé comprenant une mousse métallique ainsi que procédé et installation pour sa fabrication
WO2006021082A1 (fr) * 2004-08-24 2006-03-02 Cymat Corp. Appareil de coulage de mousse métallique et procédés idoines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109622922A (zh) * 2019-01-31 2019-04-16 重庆长安汽车股份有限公司 一种铸造装置
CN119426558A (zh) * 2024-11-05 2025-02-14 宁国桑尼泰克精密铝制品有限公司 一种轻量化铝合金铸件低压成型装置及操作工艺

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