WO1998036860A1 - Method and device for producing bodies on a metallic basis in a semi-solid state - Google Patents
Method and device for producing bodies on a metallic basis in a semi-solid state Download PDFInfo
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- WO1998036860A1 WO1998036860A1 PCT/DE1997/000306 DE9700306W WO9836860A1 WO 1998036860 A1 WO1998036860 A1 WO 1998036860A1 DE 9700306 W DE9700306 W DE 9700306W WO 9836860 A1 WO9836860 A1 WO 9836860A1
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- melting container
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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
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
Definitions
- the invention relates to a thixo casting process for the shaping production of bodies on a metallic basis, according to which the primary material is first produced and the shaping takes place after subsequent reheating to the partially liquid state.
- the invention also relates to an apparatus for performing this method.
- thixo casting This process, which is related to die casting, is characterized by the special nature of the processing of the metal in the partially liquid state. Due to the "casting temperature" within the solidification interval, which is completely atypical for a master molding process, thixo casting offers a process potential that can be classified between the master molding of casting processes and the forming by forging processes.
- Thixo casting fulfills the requirements placed on economical and innovative manufacturing technology. This includes high productivity as in die casting with very good component properties.
- the near-net-shape castings produced by this special casting process are weldable, pressure-tight and heat treatable.
- a typical area of application lies in the substitution of high-quality components, which cannot be die-cast due to high demands on the material properties, but have to be cost-forged or die-cast.
- the typical components include, for example, brake cylinders, parts of the vehicle injection system or vehicle chassis parts.
- the thixo casting process can be divided into three process steps. This includes the production of a special primary material, its reheating to the semi-liquid state and the directly connected shaping by a modified die casting process. Each individual process step contains a large number of parameters, the precise control and control of which is crucial for the success of the process.
- the first process step i.e. the production of the primary material
- the production of individual bolts of the primary material resulted in cost-intensive work steps, such as continuous casting of the material and subsequent cutting to length and turning of the bolts to the required bolt dimension. These operations are carried out at ambient temperature, so that an increased supply of heat is required for reheating the bolt, which is reflected in further costs.
- the invention is based on the tasks of providing a thixoforming method and an apparatus for carrying out this method with significantly improved economy with a correspondingly simplified method sequence.
- individual bolts are produced from the primary material, the solidification of the material being carried out under increased pressure and application of an external magnetic field.
- This single-slug production eliminates the time-consuming and costly work steps such as cutting and unscrewing the bolts.
- the cost-effectiveness is improved by the fact that the stud with an increased initial temperature can be fed directly to the reheating system.
- this method has great flexibility when changing alloys and, in particular, enables problem-free processing of alloys that are difficult to cast, e.g. high-strength Al-based kneading materials.
- the device for carrying out the method according to the invention is characterized by a heatable melt container, the melt charge of which can be pressurized by means of a pretensioning device and to which a magnetic field can be applied via an excitation winding surrounding the container.
- the bolt can be produced in the near-net-shape quality within the melting container, i.e. the bolt can be fed to the reheating process without further processing.
- the cylindrical container wall is heated. Furthermore, the container with one is advantageous Provide cooling foot, which, according to one embodiment of the invention, is a water-cooled copper foot.
- the printing device comprises a sealing plate resting on the melt pool, which is advantageously designed as a graphite disc. Due to their resistance to aluminum melts and good resistance to temperature changes, graphite materials are particularly suitable for this process. Continuous contact between the graphite disc and the melt can be achieved by preferably applying cyclic pressure to the stamp device.
- the container is double-walled.
- the walls consist of two concentric cylindrical stainless steel tubes.
- the inner stainless steel tube has coil heaters on the outside for preheating the mold wall, each of which can be controlled separately.
- the outer stainless steel tube is used on the one hand for insulation, so that there is not too much heat loss through the winding heater, and on the other hand for fastening the copper base.
- the cooling medium runs in a flow-controlled manner within a meandering cooling channel present in the cooling foot.
- FIG. 1 is a vertical section through a first embodiment of the device according to the invention in a schematic representation
- FIG. 2 shows a side view of a preferred embodiment of the melt container according to the invention.
- Fig. 3 is also a perspective view of the cooling foot.
- the melt container identified by reference number 10 contains the melt pool 11, the rheological structure 12 being shown in the lower region of the melt container 10.
- a heating element 13 is embedded in the wall of the melting container 10.
- a prestressing device 14 is able to exert a force in the direction of the arrow 15, the pressure being transmitted to a graphite disc 16 resting on the melt 11.
- the circumference of the graphite disc 16 is adapted to the inner cross section of the melting container 10 and seals it, so that the melt 11 can be put under pressure, as a result of which macro cavities in the head region of the billets, which are caused by the solidification shrinkage of the metal, can be avoided. Cyclic pressurization of the stamping device enables continuous contact between the graphite disc and the melt.
- the temperature of the cooling base 17 can be adjusted by controlling the flow of the coolant.
- the melting container 10 is surrounded by an excitation winding 18.
- a continuously variable transformer with corresponding display devices which is not shown in the drawing, is provided, with which the electric field strength and thus the shear force can be adjusted.
- the electromagnetic stirrer destroys the dendritic structure, which is unsuitable for the thixo casting process due to the poor fluidity in the partially liquid state, and builds up a globulistic structure, which leads to a good fluidity of the metallic suspension.
- FIG. 2 shows a melting container 10 as it is used according to a preferred embodiment.
- the melting container 10 consists of two concentric stainless steel tubes 19 and 20.
- the inner VA tube 19 has four winding heaters, not shown in the drawing, for preheating the mold wall on the outside, each of which can be regulated separately. These can be set in such a way that there is a temperature gradient which leads to the controlled solidification of the bolt.
- a graphite mold with a clearance fit is inserted on the inside of the inner tube 19 and a bottom in the form of a graphite disc is inserted at the lower end of the mold. Due to their resistance to aluminum melts and good resistance to temperature changes, graphite materials are particularly suitable for this process.
- the outer VA tube 20 serves on the one hand for insulation, so that a not too great heating loss occurs through the winding heater, and on the other hand for fastening the copper base 17 shown in FIG. 3.
- the cooling foot 17 is mounted on the outer tube 20.
- the result is a complete assembled unit consisting of a heatable graphite mold and a water-cooled copper base.
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Abstract
Description
Verfahren und Vorrichtung zur Herstellung von Körpern auf metallischer Basis in teilflüssigem Zustand Method and device for producing metallic-based bodies in a partially liquid state
Die Erfindung betrifft ein Thixo-Gießverfahren zur formgebenden Herstellung von Körpern auf metallischer Basis, gemäß welchem zunächst das Vormaterial hergestellt wird und die Formgebung nach anschließender Wiedererwärmung bis zum teilflüssigen Zustand erfolgt. Die Erfindung betrifft außerdem eine Vorrichtung zur Durchführung dieses Verfahrens .The invention relates to a thixo casting process for the shaping production of bodies on a metallic basis, according to which the primary material is first produced and the shaping takes place after subsequent reheating to the partially liquid state. The invention also relates to an apparatus for performing this method.
Zukünftige Entwicklungen in der Leichtbautechnik hängen insbesondere von den Werkstoffeigenschaften der eingesetzten Bauteile ab. In Konkurrenz zu hochwertigen Schmiedeteilen bedingt die Forderung nach immer besseren Eigenschaften gegossener Werkstoffe die Entwicklung technologisch anspruchsvoller Gießverfahren. Ein relativ neues Sondergießverfahren aus der Klasse des "Semi-Solid-Metalforming" stellt das Thixogießen dar. Dieses mit dem Druckgießen verwandte Verfahren zeichnet sich durch die Besonderheit der Verarbeitung des Metalls im teilflüssigen Zustand aus. Aufgrund der für einen Urformprozeß völlig untypischen "Gießtemperatur" innerhalb des Erstarrungsintervalls bietet das Thixogießen ein Verfahrenspotential, das zwischen dem Urformen von Gießverfahren und dem Umformen durch Schmiedeprozesse eingeordnet werden kann.Future developments in lightweight construction technology depend in particular on the material properties of the components used. In competition with high-quality forgings, the demand for ever better properties of cast materials requires the development of technologically sophisticated casting processes. A relatively new special casting process from the class of "semi-solid metal forming" is thixo casting. This process, which is related to die casting, is characterized by the special nature of the processing of the metal in the partially liquid state. Due to the "casting temperature" within the solidification interval, which is completely atypical for a master molding process, thixo casting offers a process potential that can be classified between the master molding of casting processes and the forming by forging processes.
Das Thixogießen erfüllt die Anforderungen, die an eine wirtschaf liche und innovative Fertigungstechnologie gestellt werden. Dazu zählen eine hohe Produktivität wie beim Druckgießen bei gleichzeitig sehr guten Bauteileigenschaften. Die nach diesem Sondergießverfahren hergestellten Gußteile in "near-net-shape"-Qualität sind schweißbar, druckdicht und wär ebehandelbar. Ein typisches Anwendungsgebiet liegt in der Substitution hochwertiger Bauteile, die aufgrund hoher Anforderungen an die Werkstoffeigenschaften nicht druckgegossen werden können, sondern kostenintensiv geschmiedet oder kokillengegossen werden müssen. Zu den ty- pischen Bauteilen zählen z.B. Bremszylinder, Teile der Kfz- Einspritzanlage oder Kfz-Fahrwerksteile.Thixo casting fulfills the requirements placed on economical and innovative manufacturing technology. This includes high productivity as in die casting with very good component properties. The near-net-shape castings produced by this special casting process are weldable, pressure-tight and heat treatable. A typical area of application lies in the substitution of high-quality components, which cannot be die-cast due to high demands on the material properties, but have to be cost-forged or die-cast. The typical components include, for example, brake cylinders, parts of the vehicle injection system or vehicle chassis parts.
Der Verfahrensablauf des Thixogießens läßt sich dabei in drei Prozeßschritte unterteilen. Hierzu zählen die Herstel- lung eines speziellen Vormaterials, dessen Wiedererwärmung in den teilflüssigen Zustand und die unmittelbar angeschlossene Formgebung durch einen modifizierten Druckgießprozeß. Jeder einzelne Prozeßschritt beinhaltet eine Vielzahl an Parametern, deren genaue Kontrolle und Steuerung für den Erfolg des Verfahrens von entscheidender Bedeutung sind .The thixo casting process can be divided into three process steps. This includes the production of a special primary material, its reheating to the semi-liquid state and the directly connected shaping by a modified die casting process. Each individual process step contains a large number of parameters, the precise control and control of which is crucial for the success of the process.
Insbesondere ist der erste Verfahrensschritt, d.h. die Herstellung des Vormaterials, beim herkömmlichen Verfahrensab- lauf äußerst aufwendig. Zur Herstellung jeweils einzelner Bolzen des Vormaterials ergaben sich kostenintensive Arbeitsschritte, wie Stranggießen des Materials und anschließendes Ablängen und Abdrehen der Bolzen auf das geforderte Bolzenmaß. Diese Arbeitsvorgänge werden bei Um- gebungstemperatur durchgeführt, so daß für die Wiedererwärmung des Bolzens eine erhöhte Wärmezufuhr erforderlich ist, was sich in weiteren Kosten niederschlägt.In particular, the first process step, i.e. the production of the primary material, extremely complex in the conventional process. The production of individual bolts of the primary material resulted in cost-intensive work steps, such as continuous casting of the material and subsequent cutting to length and turning of the bolts to the required bolt dimension. These operations are carried out at ambient temperature, so that an increased supply of heat is required for reheating the bolt, which is reflected in further costs.
Angesichts dieser Problematik liegt der Erfindung die Auf- gäbe zugrunde, ein Thixoformingverfahren sowie eine Vorrichtung zur Durchführung dieses Verfahrens mit wesentlich verbesserter Wirtschaftlichkeit bei entsprechend vereinfachtem Verfahrensablauf zur Verfügung zu stellen.In view of this problem, the invention is based on the tasks of providing a thixoforming method and an apparatus for carrying out this method with significantly improved economy with a correspondingly simplified method sequence.
Gelöst wird diese Aufgabe gemäß der Erfindung durch die im Kennzeichen des Hauptanspruches bzw. des unabhängigen Vorrichtungsanspruches angegebenen Merkmale. Hinsichtlich be- vorzugter Ausgestaltungen wird auf die Merkmale der Unteransprüche verwiesen.This object is achieved according to the invention by the features specified in the characterizing part of the main claim and the independent device claim. With regard to preferred embodiments, reference is made to the features of the subclaims.
Gemäß der Erfindung stellt man einzelne Bolzen aus dem Vor- material her, wobei man die Erstarrung des Materials unter erhöhtem Druck und Anlegen eines äußeren Magnetfeldes ausführt. Durch diese Single-Slug-Production (SSP) entfallen die zeit- und kostenaufwendigen Arbeitsschritte wie das Ablängen und Abdrehen der Bolzen. Darüber hinaus wird die Wirtschaftlichkeit verbessert, indem der Bolzen mit erhöhter Anfangstemperatur direkt der Wiedererwärmungsanlage zugeführt werden kann. Weiterhin weist dieses Verfahren eine große Flexibilität bei einem Legierungswechsel auf und ermöglicht insbesondere eine problemlose Verarbeitung schwer zu vergießender Legierungen, wie z.B. hochfester Al-Basis- Knetwerkstoffe .According to the invention, individual bolts are produced from the primary material, the solidification of the material being carried out under increased pressure and application of an external magnetic field. This single-slug production (SSP) eliminates the time-consuming and costly work steps such as cutting and unscrewing the bolts. In addition, the cost-effectiveness is improved by the fact that the stud with an increased initial temperature can be fed directly to the reheating system. Furthermore, this method has great flexibility when changing alloys and, in particular, enables problem-free processing of alloys that are difficult to cast, e.g. high-strength Al-based kneading materials.
Die Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens zeichnet sich durch einen beheizbaren Schmelzcon- tainer aus, dessen Schmelz-Charge mittels einer Vorspannvorrichtung unter Druck setzbar ist und an welchem über eine den Container umgebende Erregerwicklung ein Magnetfeld anlegbar ist. Innerhalb des Schmelzcontainers läßt sich der Bolzen in "near-net-shape"-Qualität herstellen, d.h. der Bolzen kann ohne weiteren Bearbeitungsaufwand dem Wiedererwärmungsprozeß zugeführt werden.The device for carrying out the method according to the invention is characterized by a heatable melt container, the melt charge of which can be pressurized by means of a pretensioning device and to which a magnetic field can be applied via an excitation winding surrounding the container. The bolt can be produced in the near-net-shape quality within the melting container, i.e. the bolt can be fed to the reheating process without further processing.
Eine wirtschaftliche Fertigung, besonders im Hinblick auf eine industrielle Serienproduktion der Preßbolzen, kann durch den Einsatz mehrerer parallel geschalteter SSP-Rührer und einer maximalen Energieausnutzung durch möglichst schnelle Beschickung der Wiedererwärmungsanlage erreicht werden.Economical production, particularly with regard to the industrial series production of the pressing bolts, can be achieved by using several SSP stirrers connected in parallel and using the maximum amount of energy by loading the reheating system as quickly as possible.
Gemäß einer vorteilhaften Ausgestaltung der erfindungsgemäßen Vorrichtung ist die zylindrische Containerwandung beheizt. Des weiteren ist vorteilhaft der Container mit einem Kühlfuß versehen, bei welchem es sich nach einer Ausgestaltung der Erfindung um einen wassergekühlten Kupferfuß handelt.According to an advantageous embodiment of the device according to the invention, the cylindrical container wall is heated. Furthermore, the container with one is advantageous Provide cooling foot, which, according to one embodiment of the invention, is a water-cooled copper foot.
Die Druckvorrichtung umfaßt eine auf dem Schmelzbad aufliegende Dichtungsplatte, die vorteilhaft als Graphitscheibe ausgebildet ist. Graphitwerkstoffe eignen sich aufgrund der Resistenz gegenüber Aluminiumschmelzen und einer guten Temperaturwechselbeständigkeit besonders gut für die- sen Prozeß. Durch eine vorzugsweise zyklische Druckbeaufschlagung der Stempelvorrichtung läßt sich ein kontinuierlicher Kontakt zwischen Graphitscheibe und Schmelze erreichen.The printing device comprises a sealing plate resting on the melt pool, which is advantageously designed as a graphite disc. Due to their resistance to aluminum melts and good resistance to temperature changes, graphite materials are particularly suitable for this process. Continuous contact between the graphite disc and the melt can be achieved by preferably applying cyclic pressure to the stamp device.
Entsprechend einer besonders bevorzugten Ausführungsform der Erfindung ist der Container doppelwandig ausgebildet. Dabei bestehen die Wandungen aus zwei konzentrischen zylindrischen Edelstahlrohren. Das innere Edelstahlrohr besitzt zur Vorwärmung der Kokillenwand auf der Außenseite Wickel- heizer, die jeweils getrennt regelbar sind. Das äußere Edelstahlrohr dient einerseits zur Isolierung, damit ein nicht zu großer Heizverlust durch die Wickelheizer eintritt, und andererseits zur Befestigung des Kupferfußes. Das Kühlmedium verläuft durchflußkontrolliert innerhalb ei- nes im Kühlfuß vorhandenen mäanderförmigen Kühlkanals.According to a particularly preferred embodiment of the invention, the container is double-walled. The walls consist of two concentric cylindrical stainless steel tubes. The inner stainless steel tube has coil heaters on the outside for preheating the mold wall, each of which can be controlled separately. The outer stainless steel tube is used on the one hand for insulation, so that there is not too much heat loss through the winding heater, and on the other hand for fastening the copper base. The cooling medium runs in a flow-controlled manner within a meandering cooling channel present in the cooling foot.
Weitere Vorteile, Einzelheiten und erfindungswesentliche Merkmale ergeben sich aus der nachfolgenden Beschreibung der Erfindung unter Bezugnahme auf die beigefügten Zeich- nungen. Dabei zeigen im einzelnen:Further advantages, details and features essential to the invention result from the following description of the invention with reference to the attached drawings. The individual shows:
Fig. 1 einen Vertikalschnitt durch eine erste Ausführungsform der erfindungsgemäßen Vorrichtung in schematischer Darstellung,1 is a vertical section through a first embodiment of the device according to the invention in a schematic representation,
Fig. 2 eine Seitenansicht einer bevorzugten Ausführungsform des erfindungsgemäßen Schmelzcontai- ners in perspektivischer Sicht und2 shows a side view of a preferred embodiment of the melt container according to the invention. perspective and
Fig. 3 eine Ansicht des Kühlfußes ebenfalls perspektivisch dargestellt.Fig. 3 is also a perspective view of the cooling foot.
Der grundsätzliche Aufbau soll zunächst anhand der schematischen Darstellung gemäß Fig. 1 näher erläutert werden.The basic structure will first be explained in more detail with reference to the schematic illustration according to FIG. 1.
Der mit der Bezugsziffer 10 identifizierte Schmelzcontainer enthält das Schmelzbad 11 , wobei im unteren Bereich des Schmelzcontainers 10 das Rheogefüge 12 dargestellt ist. In die Wandung des Schmelzcontainers 10 ist ein Heizelement 13 eingebettet.The melt container identified by reference number 10 contains the melt pool 11, the rheological structure 12 being shown in the lower region of the melt container 10. A heating element 13 is embedded in the wall of the melting container 10.
Eine Vorspannvorrichtung 14 vermag eine Kraft in Richtung des Pfeiles 15 auszuüben, wobei der Druck auf eine auf der Schmelze 11 aufliegende Graphitscheibe 16 übertragen wird. Der Umfang der Graphitscheibe 16 ist dem Innenquerschnitt des Schmelzcontainers 10 angepaßt und dichtet diesen ab, so daß damit die Schmelze 11 unter Druck setzbar ist, wodurch sich Makrolunker im Kopfbereich der Billets, die durch die Erstarrungsschwindung des Metalls entstehen, vermeiden lassen. Durch eine zyklische Druckbeaufschlagung der Stempelvorrichtung läßt sich ein kontinuierlicher Kontakt zwischen der Graphitscheibe und der Schmelze erreichen.A prestressing device 14 is able to exert a force in the direction of the arrow 15, the pressure being transmitted to a graphite disc 16 resting on the melt 11. The circumference of the graphite disc 16 is adapted to the inner cross section of the melting container 10 and seals it, so that the melt 11 can be put under pressure, as a result of which macro cavities in the head region of the billets, which are caused by the solidification shrinkage of the metal, can be avoided. Cyclic pressurization of the stamping device enables continuous contact between the graphite disc and the melt.
Unterhalb des Schmelzcontainers 10 befindet sich ein wassergekühlter Kupferfuß 17. Die Temperatur des Kühlfußes 17 läßt sich durch die Strömungssteuerung des Kühlmittels ein- stellen.Below the melting container 10 there is a water-cooled copper base 17. The temperature of the cooling base 17 can be adjusted by controlling the flow of the coolant.
Der Schmelzcontainer 10 ist von einer Erregerwicklung 18 umgeben. Zum Betreiben der Erregerwicklung ist ein in der zeichnerischen Darstellung nicht wiedergegebener stufenlos regelbarer Transformator mit entsprechenden Anzeigegeräten vorgesehen, mit dem die elektrische Feldstärke und somit die Scherkraft eingestellt werden kann. Durch die Wirkung des elektromagnetischen Rührers wird das dendritische Gefüge, welches für den Thixogießprozeß aufgrund der schlechten Fließfähigkeit im teilflüssigen Zustand ungeeignet ist, zerstört und ein globulistisches Gefüge aufgebaut, welches zu einer guten Fließfähigkeit der metallischen Suspension führt.The melting container 10 is surrounded by an excitation winding 18. To operate the excitation winding, a continuously variable transformer with corresponding display devices, which is not shown in the drawing, is provided, with which the electric field strength and thus the shear force can be adjusted. By the effect The electromagnetic stirrer destroys the dendritic structure, which is unsuitable for the thixo casting process due to the poor fluidity in the partially liquid state, and builds up a globulistic structure, which leads to a good fluidity of the metallic suspension.
In Fig. 2 ist ein Schmelzcontainer 10 wiedergegeben, wie er gemäß einer bevorzugten Ausführungsform zum Einsatz kommt. Der Schmelzcontainer 10 besteht aus zwei konzentrischen Edelstahlrohren 19 und 20. Das innere VA-Rohr 19 besitzt zur Vorwärmung der Kokillenwand auf der Außenseite vier in der Zeichnung nicht wiedergegebene Wickelheizer, die jeweils getrennt regelbar sind. Diese können derart einge- stellt werden, daß ein Temperaturgradient vorliegt, der zur gelenkten Erstarrung des Bolzens führt. Auf der Innenseite des inneren Rohres 19 ist eine Graphitkokille mit einer Spielpassung eingesetzt und am unteren Ende der Kokille ein Boden in Form einer Graphitscheibe eingefügt. Graphitwerk- stoffe eignen sich aufgrund der Resistenz gegenüber Aluminiumschmelzen und einer guten Temperaturwechselbeständigkeit besonders gut für dieses Verfahren.FIG. 2 shows a melting container 10 as it is used according to a preferred embodiment. The melting container 10 consists of two concentric stainless steel tubes 19 and 20. The inner VA tube 19 has four winding heaters, not shown in the drawing, for preheating the mold wall on the outside, each of which can be regulated separately. These can be set in such a way that there is a temperature gradient which leads to the controlled solidification of the bolt. A graphite mold with a clearance fit is inserted on the inside of the inner tube 19 and a bottom in the form of a graphite disc is inserted at the lower end of the mold. Due to their resistance to aluminum melts and good resistance to temperature changes, graphite materials are particularly suitable for this process.
Das äußere VA-Rohr 20 dient einerseits zur Isolierung, da- mit ein nicht zu großer Heizverlust durch die Wickelheizer eintritt, und andererseits zur Befestigung des in Fig. 3 dargestellten Kuperfußes 17.The outer VA tube 20 serves on the one hand for insulation, so that a not too great heating loss occurs through the winding heater, and on the other hand for fastening the copper base 17 shown in FIG. 3.
Der Kupferfuß gemäß Fig. 3 ist mit einem mäanderförmigen Kühlkanal 21 versehen, durch welchen das Kühlmittel durchflußkontrolliert hindurchströmt.3 is provided with a meandering cooling channel 21 through which the coolant flows in a flow-controlled manner.
Der Kühlfuß 17 ist am äußeren Rohr 20 montiert. Es entsteht somit eine komplette montierte Einheit aus einer beheizba- ren Graphitkokille und einem wassergekühlten Kupferfuß. Es soll an dieser Stelle noch einmal ausdrücklich zum Ausdruck gebracht werden, daß es sich bei der vorangehenden Beschreibung lediglich um eine solche beispielhaften Charakters handelt und daß verschiedene Abänderungen und Modifikationen möglich sind, ohne dabei den Rahmen der Erfindung zu verlassen. The cooling foot 17 is mounted on the outer tube 20. The result is a complete assembled unit consisting of a heatable graphite mold and a water-cooled copper base. At this point, it should again be expressly expressed that the foregoing description is merely of an exemplary nature and that various changes and modifications are possible without departing from the scope of the invention.
Claims
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1997/000306 WO1998036860A1 (en) | 1997-02-19 | 1997-02-19 | Method and device for producing bodies on a metallic basis in a semi-solid state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1997/000306 WO1998036860A1 (en) | 1997-02-19 | 1997-02-19 | Method and device for producing bodies on a metallic basis in a semi-solid state |
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| WO1998036860A1 true WO1998036860A1 (en) | 1998-08-27 |
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| PCT/DE1997/000306 Ceased WO1998036860A1 (en) | 1997-02-19 | 1997-02-19 | Method and device for producing bodies on a metallic basis in a semi-solid state |
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Cited By (8)
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|---|---|---|---|---|
| DE10047735A1 (en) * | 2000-09-27 | 2002-04-11 | Rauch Fertigungstech Gmbh | Process for die casting and filling sleeve therefor as well as die casting machine |
| EP1407841A3 (en) * | 2002-09-25 | 2005-06-22 | Chunpyo Hong | Method and apparatus for manufacturing billets for thixocasting |
| CN103691895A (en) * | 2013-12-18 | 2014-04-02 | 北京科技大学 | Method and device for manufacturing semi-solid metal by using serpentine vibration channel |
| CN107695318A (en) * | 2017-09-29 | 2018-02-16 | 重庆理工大学 | A kind of foam magnesium sandwich plate and its Semi-Solid Thixoforming Seepage Foundry method |
| CN107952942A (en) * | 2016-10-18 | 2018-04-24 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of holding furnace for being used to continuously prepare aluminium alloy semi-solid slurry |
| CN107952940A (en) * | 2016-10-18 | 2018-04-24 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of continuous temperature control system for preparing aluminium alloy semi-solid slurry holding furnace |
| CN107999720A (en) * | 2016-11-02 | 2018-05-08 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of knotting formula holding furnace for being used to continuously prepare aluminium alloy semi-solid slurry |
| CN109304435A (en) * | 2017-07-27 | 2019-02-05 | 福建省瑞奥麦特轻金属有限责任公司 | A crucible furnace type pressurized solidification semi-solid aluminum alloy small parts forming machine |
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| JPH02156031A (en) * | 1988-12-09 | 1990-06-15 | Suzuki Motor Co Ltd | Method for molding preform for metal composite material |
| EP0719606A1 (en) * | 1994-12-28 | 1996-07-03 | Ahresty Corporation | A Method of manufacturing metallic slurry for casting |
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| JPH02156031A (en) * | 1988-12-09 | 1990-06-15 | Suzuki Motor Co Ltd | Method for molding preform for metal composite material |
| EP0719606A1 (en) * | 1994-12-28 | 1996-07-03 | Ahresty Corporation | A Method of manufacturing metallic slurry for casting |
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| GABATHULER J -P ET AL: "THIXOFORMING-BAUTEILE FUER DEN AUTOMOBILBAU", ATZ AUTOMOBILTECHNISCHE ZEITSCHRIFT, vol. SONDERAUSGABE, 1996, pages 19 - 21, XP000599086 * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10047735A1 (en) * | 2000-09-27 | 2002-04-11 | Rauch Fertigungstech Gmbh | Process for die casting and filling sleeve therefor as well as die casting machine |
| EP1407841A3 (en) * | 2002-09-25 | 2005-06-22 | Chunpyo Hong | Method and apparatus for manufacturing billets for thixocasting |
| CN103691895A (en) * | 2013-12-18 | 2014-04-02 | 北京科技大学 | Method and device for manufacturing semi-solid metal by using serpentine vibration channel |
| CN103691895B (en) * | 2013-12-18 | 2016-05-11 | 北京科技大学 | A kind of vibration serpentine channel preparation method and device of semi-solid-state metal |
| CN107952942A (en) * | 2016-10-18 | 2018-04-24 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of holding furnace for being used to continuously prepare aluminium alloy semi-solid slurry |
| CN107952940A (en) * | 2016-10-18 | 2018-04-24 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of continuous temperature control system for preparing aluminium alloy semi-solid slurry holding furnace |
| CN107999720A (en) * | 2016-11-02 | 2018-05-08 | 福建省瑞奥麦特轻金属有限责任公司 | A kind of knotting formula holding furnace for being used to continuously prepare aluminium alloy semi-solid slurry |
| CN109304435A (en) * | 2017-07-27 | 2019-02-05 | 福建省瑞奥麦特轻金属有限责任公司 | A crucible furnace type pressurized solidification semi-solid aluminum alloy small parts forming machine |
| CN107695318A (en) * | 2017-09-29 | 2018-02-16 | 重庆理工大学 | A kind of foam magnesium sandwich plate and its Semi-Solid Thixoforming Seepage Foundry method |
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