EP0953392B1 - Process for making permanent moulds - Google Patents
Process for making permanent moulds Download PDFInfo
- Publication number
- EP0953392B1 EP0953392B1 EP99103744A EP99103744A EP0953392B1 EP 0953392 B1 EP0953392 B1 EP 0953392B1 EP 99103744 A EP99103744 A EP 99103744A EP 99103744 A EP99103744 A EP 99103744A EP 0953392 B1 EP0953392 B1 EP 0953392B1
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- EP
- European Patent Office
- Prior art keywords
- layers
- mould
- permanent
- sheet metal
- metal container
- 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.)
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
Definitions
- the invention relates to a method for introduction spatially designed, tempering metal Pipes in a permanent metal form for Archetypes of metals or plastics under pressure, the pipelines the spatial course of the Engraving surfaces of the cavity at least largely adapted become.
- Permanent forms for the primary shaping of metals under pressure for example of aluminum or zinc pressure guá or of plastics, by pressure or injection molding, as well as mold inserts or cores in the area of the cavity Permanent forms are often used with tempering Channels. These channels are used during the Original molding with a coolant that the Control of heat dissipation during solidification and cooling of the molded part.
- the channels are mainly produced by drilling and therefore run straight. Customizing the channels to a spatial course of the engraving areas of the Cavity is therefore very difficult. For this purpose, in generally many holes from appropriate directions introduced and interconnected in the form. There a large part of the holes from auxiliary holes exists, they must be closed again later. Despite the high manufacturing costs, the can on The above-mentioned channels are only produced in sections follow the engraving. Therefore, the so produced are sufficient Permanent forms under heat transfer aspects the requirements are often very inadequate. About that the necessary auxiliary holes also form static ones Weaknesses of the highly stressed permanent forms that lead to Starting point of signs of fatigue and can lead to failure of the permanent form.
- This The procedure can only be used if the decomposition the permanent form can be made so that the individual body at least partially contain.
- a permanent form with this procedure channels formed compared to a permanent form drilled channels have less rigidity. Moreover sealing problems can occur.
- a powder metallurgical process is also known, that allows any temperature control system to be designed in Introduce die casting molds (DE 44 26 544 A1). at This process uses a metal channel Modeled material, especially copper.
- the spatially shaped metal rods are initially in one Tin containers that contain or represent the later form should be laid in terms of construction. Then the Container filled up with a metal powder and gas-tight locked. After that, the metal powder becomes hot isostatic compacted. Following this, the Metal rods melted out of the molded body and thus the cooling channels exposed.
- the invention has for its object a method for installing spatially designed pipelines in to create a permanent metal shape that enables the pipes are largely free in space, but with high positional accuracy and inside one metal permanent form to connect material and form-fitting.
- every cut surface of the individual layers is intended to accommodate at least one cooling tube the number of layers by the number of required Cooling pipes set.
- the contact areas of the individual layers are so intimate connected that they are neither by ultrasonic testing nor can be found metallographically.
- the firmness the diffusion composite does not differ from that Strength of the base material of the permanent mold.
- Diffusion-welded permanent shape can be soft annealed and edit in any other way, for example to incorporate the engraving into the permanent shape.
- the powder bed has - depending on the type of chosen Powder beds - different effects.
- a metal one Powder bed suitably made of the same type of material steel powder is elected if a firm connection after hot isostatic pressing to be brought about to the layers. in this connection the powder bed serves to fill gaps, gaps and cavities compensate.
- a ceramic, not sintered Powder bed for example made of aluminum or zirconium oxide, has the opposite effect. In this case hot isostatic pressing does not create a connection between the layers and the powder bed as well as the Tin container formed so that the container to End can be removed with little effort.
- the method according to the invention can still do this be improved that the tin container before closing flushed with inert gas, preferably nitrogen and that the closing of the tin container under Inert gas takes place. This is conveniently done Closing the sheet metal container at ambient pressure.
- inert gas preferably nitrogen
- the Disassembly of the permanent mold or the molded body to be cooled or use of mold in layers both vertically as well as horizontally to the mold parting line thus consists of vertical and / or horizontal and / or mixed stacks of plane-parallel layers.
- Disassembly of the permanent mold or the molded body to be cooled or mold insert in layers in any Space arranged levels takes place.
- Permanent form for archiving metals or plastics under pressure is the permanent mold made of known mold steels, like tool and high speed steels, educated.
- Process manufactured metal permanent mold for archiving metals or plastics under Print is the permanent form made of known nickel, copper or Formed aluminum alloys.
- a particularly useful embodiment of the object the invention is that for Cooling tubes steels, especially stainless steels, or Nickel, copper and aluminum alloys are used become.
- the individual layers are expediently the Permanent mold or the molded body or mold insert to be cooled provided with ventilation channels.
- Permanent form can still be improved in that the individual layers of the permanent form or the one to be cooled Shaped body or insert with a profile are provided. As a result, the contact surfaces of the individual layers interlocked.
- the permanent forms shown in the drawing are in Layers 1 disassembled and point in the area of Cut surfaces of the layers 1 cooling lines 2.
- the Cooling lines 2 are adapted to the engraving 3 of the cavity.
- FIG. 1 the cooling lines 2 are represented by thin solid lines.
- the layers 1 forming the permanent shape are provided with grooves 4 provided (Fig. 3) into which the cooling lines 2 are inserted are. However, an additional layer 1 ' be provided that has no groove. Like from the 1 and 2 can be seen, are the merged and fixed layers 1 from a sheet metal container 5 encapsulated from which the cooling lines 2 to the outside protrude.
- the layers 1 the permanent form with a profile 7 and / or with Pin 8 may be provided.
- the layers 1 of the permanent form have ventilation channels 6 on.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Einbringen räumlich gestalteter, der Temperierung dienender metallener Rohrleitungen in eine metallene Dauerform zum Urformen von Metallen oder Kunststoffen unter Druck, wobei die Rohrleitungen dem räumlichen Verlauf der Gravurflächen der Kavität zumindest weitgehend angepaßt werden.The invention relates to a method for introduction spatially designed, tempering metal Pipes in a permanent metal form for Archetypes of metals or plastics under pressure, the pipelines the spatial course of the Engraving surfaces of the cavity at least largely adapted become.
Dauerformen zum Urformen von Metallen unter Druckanwendung, beispielsweise von Aluminium- oder Zinkdruckguá oder von Kunststoffen, durch Druck- oder Spritzgießen, sowie Formeinsätze oder Kerne im Bereich der Kavität der Dauerform werden häufig mit der Temperierung dienenden Kanälen versehen. Diese Kanäle werden während der Urformung mit einem Kühlmittel beaufschlagt, das der Steuerung der Wärmeabfuhr beim Erstarren und Abkühlen des Formteils dient.Permanent forms for the primary shaping of metals under pressure, for example of aluminum or zinc pressure guá or of plastics, by pressure or injection molding, as well as mold inserts or cores in the area of the cavity Permanent forms are often used with tempering Channels. These channels are used during the Original molding with a coolant that the Control of heat dissipation during solidification and cooling of the molded part.
Die Kanäle werden vorwiegend durch Bohren hergestellt und verlaufen daher geradlinig. Das Anpassen der Kanäle an einen räumlichen Verlauf der Gravurflächen der Kavität ist daher sehr schwierig. Hierzu werden im allgemeinen viele Bohrungen aus geeigneten Richtungen eingebracht und in der Form miteinander verbunden. Da ein großer Teil der Bohrungen aus Hilfsbohrungen besteht, müssen diese später wieder verschlossen werden. Trotz des hohen Fertigungsaufwandes können die auf die vorgenannte Weise hergestellten Kanäle nur abschnittsweise der Gravur folgen. Daher genügen die so hergestellten Dauerformen unter Wärmeübertragungsaspekten den Anforderungen häufig nur sehr unzureichend. Darüber hinaus bilden die notwendigen Hilfsbohrungen statische Schwachstellen der hochbelasteten Dauerformen, die zum Ausgangspunkt von Ermüdungserscheinungen werden und dadurch zum Ausfall der Dauerform führen können.The channels are mainly produced by drilling and therefore run straight. Customizing the channels to a spatial course of the engraving areas of the Cavity is therefore very difficult. For this purpose, in generally many holes from appropriate directions introduced and interconnected in the form. There a large part of the holes from auxiliary holes exists, they must be closed again later. Despite the high manufacturing costs, the can on The above-mentioned channels are only produced in sections follow the engraving. Therefore, the so produced are sufficient Permanent forms under heat transfer aspects the requirements are often very inadequate. About that the necessary auxiliary holes also form static ones Weaknesses of the highly stressed permanent forms that lead to Starting point of signs of fatigue and can lead to failure of the permanent form.
Bei einem anderen bekannten Verfahren werden die der Temperierung dienenden Kanäle in der Weise gebildet, daß die Dauerform zunächst in einfache raumerfüllende geometrische Körper, wie Platten, Zylinder, Kegel o. dgl., zerlegt werden. In diese Körper werden dann die Kanäle eingefräst. Danach werden die einzelnen Körper unter Einfügung von Dichtungen wieder zusammengesetzt. Dieses Verfahren kann nur dann Anwendung finden, wenn die Zerlegung der Dauerform so vorgenommen werden kann, daß die einzelnen Körper die Hohlform zumindest teilweise enthalten. Eine Dauerform mit nach diesem Verfahren gebildeten Kanälen weist gegenüber einer Dauerform mit gebohrten Kanälen eine geringere Steifigkeit auf. Außerdem können Dichtungsprobleme auftreten.In another known method, the Tempering channels formed in such a way that the permanent form first in simple space-filling geometrical Bodies, such as plates, cylinders, cones or the like, be disassembled. The channels then become into these bodies milled. After that, the individual bodies are under Insertion of seals reassembled. This The procedure can only be used if the decomposition the permanent form can be made so that the individual body at least partially contain. A permanent form with this procedure channels formed compared to a permanent form drilled channels have less rigidity. Moreover sealing problems can occur.
Bekannt ist ferner ein pulvermetallurgisches Verfahren, das es erlaubt, beliebig gestaltete Temperiersysteme in Druckgußformen einzubringen (DE 44 26 544 A1). Bei diesem Verfahren werden die Kanäle durch einen metallenen Werkstoff, insbesondere Kupfer, modelliert. Die räumlich geformten Metallstäbe werden zunächst in einem Blechbehälter, der die spätere Form enthalten bzw. darstellen soll, konstruktionsmäßig verlegt. Dann wird der Behälter mit einem Metallpulver aufgefüllt und gasdicht verschlossen. Danach wird das Metallpulver heißisostatische kompaktiert. Im Anschluß daran werden die Metallstäbe aus dem Formkörper ausgeschmolzen und somit die Kühlkanäle freigelegt. A powder metallurgical process is also known, that allows any temperature control system to be designed in Introduce die casting molds (DE 44 26 544 A1). at This process uses a metal channel Modeled material, especially copper. The spatially shaped metal rods are initially in one Tin containers that contain or represent the later form should be laid in terms of construction. Then the Container filled up with a metal powder and gas-tight locked. After that, the metal powder becomes hot isostatic compacted. Following this, the Metal rods melted out of the molded body and thus the cooling channels exposed.
Aus der Literatur (Powder Matallurgy 1996, Vol. 39, No. 4) ist ein weiteres pulvermetallurgiches Verfahren bekannt, bei dem Rohrleitungen aus Stahl räumlich beliebig in einem Behälter verlegt und an den Enden mit diesem gasdicht verschweißt werden. Analog dem vorstehend beschriebenen Verfahren wird der Behälter mit Metallpulver aufgefüllt, gasdicht verschlossen und heißisostatisch gepreßt. Da die Stahlrohre bei diesem bekannten Verfahren von innen mit dem Druckmedium der Heißisostatpresse beaufschlagt werden, bleibt ihr Öffnungsquerschnitt während des Kompaktierungsprozesses bis auf eine isotrope Schwindung weitgehend unbeeinflußt.From the literature (Powder Matallurgy 1996, Vol. 39, No. 4) is another powder metallurgy process known, spatially in the steel piping arbitrarily laid in a container and at the ends with can be welded gas-tight. Analogous to the one above described method is the container with Filled in metal powder, sealed gastight and hot isostatic pressed. Because the steel pipes in this known methods from the inside with the pressure medium When the hot isostatic press is applied, its opening cross-section remains during the compacting process until largely unaffected by isotropic shrinkage.
Die beiden letztgenannten bekannten Verfahren zeichnen sich durch ihre nahezu beliebige räumliche Gestaltungsfreiheit aus. Dennoch fanden diese Verfahren bisher nur wenig Verbreitung. Dies ist darauf zurückzuführen, daß die Genauigkeit der Leitungsführung in der fertigen Form erheblich eingeschränkt ist und damit in krassem Gegensatz zu der sonst üblichen hohen Präzision des Formenbaus steht. Dieser Mangel ist die Folge der nicht sehr genau vorhersehbaren Schwindung des Formenkörpers beim Kompaktierungsprozeß. Im Formenbau sind die pulvermetallurgischen Verfahren nicht bekannt.Draw the latter two known methods through their almost unlimited spatial design freedom out. However, these methods have so far only been found little spread. This is due to the fact that the accuracy of the cable routing in the finished form is considerably restricted and therefore in stark contrast to the otherwise usual high precision of mold making stands. This lack is the result of not being very precisely predictable shrinkage of the molded body during Compaction process. In mold making, the powder metallurgy Process not known.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Einbringen räumlich gestalteter Rohrleitungen in eine metallene Dauerform zu schaffen, das es ermöglicht, die Rohrleitungen räumlich weitgehend frei, jedoch mit hoher Lagegenauigkeit zu gestalten und im Innern einer metallenen Dauerform stoff- und formschlüssig zu verbinden.The invention has for its object a method for installing spatially designed pipelines in to create a permanent metal shape that enables the pipes are largely free in space, but with high positional accuracy and inside one metal permanent form to connect material and form-fitting.
Die gestellte Aufgabe wird bei dem Verfahren der eingangs beschrieben Art dadurch gelöst,
- daß die Dauerform bzw. der zu kühlende Formkörper oder Formeinsatz in eine Vielzahl planparalleler Schichten, wie Rechteck-, Vieleck- oder Zylinderplatten, zerlegt wird, die so bemessen sind, daß die spätere Gravur von den Schichten vielfach geschnitten wird,
- daß jede Schicht mit mindestens einer Nut versehen wird, wobei die Nuten derart angeordnet werden, daß sie mit dem gewünschten Verlauf der Kühlrohre entlang der Kontur der später einzuarbeitenden Gravur übereinstimmen,
- daß in die Nuten die Kühlrohre eingefügt und befestigt werden,
- daß die Schichten in der richtigen Reihenfolge lagengenau zu der Gesamtform zusammengelegt und fixiert werden,
- daß die zusammengelegten und fixierten Schichten in einen die Gesamtform allseitig engumschlieáenden Blechcontainer eingekapselt werden, wobei der Blechcontainer im Bereich der austretenden Kühlrohre entsprechende Öffnungen aufweist, durch die die Kühlrohre hindurchgeführt sind,
- daß der Blechcontainer gasdicht verschlossen und luftleer gepumpt wird
- und daá der Blechcontainer derart heißisostatisch gepreßt wird, daß die einzelnen Schichten untereinander und mit den Kühlrohren diffusiv verschweißt werden.
- that the permanent mold or the molded body or mold insert to be cooled is broken down into a large number of plane-parallel layers, such as rectangular, polygonal or cylindrical plates, which are dimensioned such that the later engraving is often cut by the layers,
- that each layer is provided with at least one groove, the grooves being arranged in such a way that they correspond to the desired course of the cooling tubes along the contour of the engraving to be incorporated later,
- that the cooling pipes are inserted and fastened in the grooves,
- that the layers are put together and fixed in the correct order to form the overall shape,
- that the collapsed and fixed layers are encapsulated in a sheet metal container that closely encloses the overall shape on all sides, the sheet metal container having corresponding openings in the area of the emerging cooling tubes through which the cooling tubes are passed,
- that the sheet metal container is sealed gas-tight and pumped air-free
- and that the sheet metal container is so hot isostatically pressed that the individual layers are welded to one another and to the cooling tubes diffusively.
Da jede Schnittfläche der einzelnen Schichten dazu bestimmt ist, mindestens ein Kühlrohr aufzunehmen, wird die Anzahl der Schichten durch die Anzahl der erforderlichen Kühlrohre festgelegt.Because every cut surface of the individual layers is intended to accommodate at least one cooling tube the number of layers by the number of required Cooling pipes set.
Nach Abschluß des erfindungsgemäßen Verfahrens sind alle Teile metallurgisch miteinander verbunden. Die diffusionsverschweißten Schichten sind nicht mehr trennbar. After completion of the process according to the invention, all are Parts metallurgically connected. The diffusion welded Layers are no longer separable.
Die Kontaktflächen der einzelnen Schichten sind so innig verbunden, daß sie weder durch Ultraschallprüfung noch metallographisch wieder auffindbar sind. Die Festigkeit des Diffusionsverbundes unterscheidet sich nicht von der Festigkeit des Grundwerkstoffs der Dauerform.The contact areas of the individual layers are so intimate connected that they are neither by ultrasonic testing nor can be found metallographically. The firmness the diffusion composite does not differ from that Strength of the base material of the permanent mold.
Die nach dem erfindungsgemäßen Verfahren hergestellte diffusionsverschweißte Dauerform läßt sich weichglühen und in jeder sonstigen Weise bearbeiten, beispielsweise um die Gravur in die Dauerform einzuarbeiten.The one produced by the method according to the invention Diffusion-welded permanent shape can be soft annealed and edit in any other way, for example to incorporate the engraving into the permanent shape.
In Ausgestaltung der Erfindung wird zwischen den zusammengelegten und fixierten Schichten und dem Blechcontainer ein metallenes oder keramisches Pulverbett eingebracht.In an embodiment of the invention is between the merged and fixed layers and the sheet metal container a metal or ceramic powder bed brought in.
Das Pulverbett hat - abhängig von der Art des gewählten Pulverbetts - unterschiedliche Wirkungen. Ein metallenes Pulverbett, das zweckmäßigerweise aus artgleichem Werkstoffstahlpulver gebildet ist, wird dann gewählt, wenn nach dem heißisostatischen Pressen eine feste Verbindung zu den Schichten herbeigeführt werden soll. Hierbei dient das Pulverbett dazu, Lücken, Spalte und Hohlräume auszugleichen. Ein keramisches, nicht sinteraktives Pulverbett, beispielsweise aus Aluminium- oder Zirkoniumoxid, hat eine gegenteilige Wirkung. In diesem Falle wird durch das heißisostatische Pressen keine Verbindung zwischen den Schichten und dem Pulverbett sowie dem Blechcontainer gebildet, so daß sich der Container zum Schluß mit geringem Aufwand entfernen läßt.The powder bed has - depending on the type of chosen Powder beds - different effects. A metal one Powder bed, suitably made of the same type of material steel powder is elected if a firm connection after hot isostatic pressing to be brought about to the layers. in this connection the powder bed serves to fill gaps, gaps and cavities compensate. A ceramic, not sintered Powder bed, for example made of aluminum or zirconium oxide, has the opposite effect. In this case hot isostatic pressing does not create a connection between the layers and the powder bed as well as the Tin container formed so that the container to End can be removed with little effort.
Das erfindungsgemäße Verfahren kann noch dadurch verbessert werden, daß der Blechcontainer vor dem Verschließen mit Inertgas, vorzugsweise Stickstoff, gespült wird und daß das Verschließen des Blechcontainers unter Inertgas erfolgt. Hierbei erfolgt zweckmäßigerweise das Verschließen des Blechcontainers bei Umgebungsdruck.The method according to the invention can still do this be improved that the tin container before closing flushed with inert gas, preferably nitrogen and that the closing of the tin container under Inert gas takes place. This is conveniently done Closing the sheet metal container at ambient pressure.
In weiterer Ausgestaltung der Erfindung erfolgt die Zerlegung der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes in Schichten sowohl senkrecht als auch waagerecht zur Formentrennebene. Die Dauerform besteht somit aus senkrechten und/oder waagerechten und/oder gemischten Stapeln planparalleler Schichten.In a further embodiment of the invention, the Disassembly of the permanent mold or the molded body to be cooled or use of mold in layers both vertically as well as horizontally to the mold parting line. The permanent form thus consists of vertical and / or horizontal and / or mixed stacks of plane-parallel layers.
Nach einem anderen Merkmal der Erfindung erfolgt die Zerlegung der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes in Schichten sowohl senkrecht als auch waagerecht zur Schließrichtung des Formwerkzeugs.According to another feature of the invention Disassembly of the permanent mold or the molded body to be cooled or use of mold in layers both vertically as well as horizontally to the closing direction of the mold.
In bestimmten Fällen kann es vorteilhaft sein, daß die Zerlegung der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes in Schichten in beliebig im Raum angeordnete Ebenen erfolgt.In certain cases it may be advantageous that the Disassembly of the permanent mold or the molded body to be cooled or mold insert in layers in any Space arranged levels takes place.
Bei einer bevorzugten Ausführungsform der nach dem erfindungsgemäßen Verfahren hergestellten metallenen Dauerform zum Urformen von Metallen oder Kunststoffen unter Druck ist die Dauerform aus bekannten Formenstählen, wie Werkzeug- und Schnellarbeitsstählen, gebildet.In a preferred embodiment of the after Processed metals according to the invention Permanent form for archiving metals or plastics under pressure is the permanent mold made of known mold steels, like tool and high speed steels, educated.
Bei einer anderen Ausführungsform der nach dem erfindungsgemäßen Verfahren hergestellten metallenen Dauerform zum Urformen von Metallen oder Kunststoffen unter Druck ist die Dauerform aus bekannten Nickel-, Kupferoder Aluminiumlegierungen gebildet. In another embodiment of the according to the invention Process manufactured metal permanent mold for archiving metals or plastics under Print is the permanent form made of known nickel, copper or Formed aluminum alloys.
Die vorstehend genannten Werkstoffe haben sich im Formenbau bestens bewährt.The above materials have been used in Mold making well proven.
Eine besonders zweckmäßige Ausführungsform des Gegenstandes der Erfindung besteht darin, daß auch für die Kühlrohre Stähle, insbesondere Rostfreistähle, oder Nickel-, Kupfer- und Aluminiumlegierungen verwendet werden.A particularly useful embodiment of the object the invention is that for Cooling tubes steels, especially stainless steels, or Nickel, copper and aluminum alloys are used become.
Zweckmäßigerweise sind die einzelnen Schichten der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes mit Entlüftungskanälen versehen.The individual layers are expediently the Permanent mold or the molded body or mold insert to be cooled provided with ventilation channels.
Die nach dem erfindungsgemäßen Verfahren hergestellte Dauerform kann noch dadurch verbessert werden, daß die einzelnen Schichten der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes mit einer Profilierung versehen sind. Hierdurch werden die Kontaktflächen der einzelnen Schichten miteinander verzahnt.The one produced by the method according to the invention Permanent form can still be improved in that the individual layers of the permanent form or the one to be cooled Shaped body or insert with a profile are provided. As a result, the contact surfaces of the individual layers interlocked.
Eine weitere Verbesserung der Dauerform kann dadurch erreicht werden, daß die einzelnen Schichten der Dauerform bzw. des zu kühlenden Formkörpers oder Formeinsatzes mit Zapfen, Stiften o. dgl. versehen sind, die in entsprechende Ausnehmungen, die in den jeweils angrenzenden Schichten vorgesehen sind, eingreifen. Dadurch ist eine sehr genaue Fixierung der Bestandteile der Dauerform vor deren diffusivem Verschweißen gewährleistet.This can further improve the permanent form achieved that the individual layers of the Permanent shape or the shaped body to be cooled or Mold insert are provided with pins, pins or the like, in corresponding recesses, in each adjacent layers are provided to intervene. This is a very precise fixation of the components the permanent form before it is diffusively welded.
Bei bestimmten Verläufen der Kühlrohre kann es zweckmäßig sein, daß zwischen oder neben den mit mindestens einer Nut versehenen Schichten mindestens eine zusätzliche Schicht vorgesehen ist, die keine Nut aufweist. With certain runs of the cooling pipes, it can be useful be between or next to those with at least at least one additional layer provided with a groove Layer is provided which has no groove.
In der Zeichnung sind Ausführungsbeispiele von nach dem erfindungsgemäßen Verfahren hergestellten Dauerformen schematisch dargestellt. Es zeigen:
- Fig. 1
- eine Draufsicht auf eine Dauerform;
- Fig. 2
- eine Vorderansicht eines Teils einer Dauerform;
- Fig. 3
- mehrere Schichten einer Dauerform in der Art einer Explosionszeichnung;
- Fig. 4
- eine Vorderansicht eines anderen Teils einer Dauerform;
- Fig. 5
- mehrere Schichten einer anderen Dauerform in der Art einer Explosionszeichnung;
- Fig. 1
- a plan view of a permanent shape;
- Fig. 2
- a front view of part of a permanent mold;
- Fig. 3
- several layers of a permanent form in the manner of an exploded drawing;
- Fig. 4
- a front view of another part of a permanent shape;
- Fig. 5
- several layers of another permanent form in the manner of an exploded drawing;
Die in der Zeichnung dargestellten Dauerformen sind in
Schichten 1 zerlegt und weisen im Bereich der
Schnittflächen der Schichten 1 Kühlleitungen 2 auf. Die
Kühlleitungen 2 sind dabei der Gravur 3 der Kavität angepaßt.
Der besseren Übersicht wegen sind in der Fig. 1
die Kühlleitungen 2 durch dünne Vollinien dargestellt.The permanent forms shown in the drawing are in
Die die Dauerform bildenden Schichten 1 sind mit Nuten 4
versehen (Fig. 3), in die die Kühlleitungen 2 eingefügt
sind. Es kann aber auch eine zusätzliche Schicht 1'
vorgesehen sein, die keine Nut aufweist. Wie aus den
Fig. 1 und 2 zu ersehen ist, sind die zusammengelegten
und fixierten Schichten 1 von einem Blechcontainer 5
eingekapselt, aus dem die Kühlleitungen 2 nach außen
hervorragen.The
Wie aus Fig. 4 zu ersehen ist, können die Schichten 1
der Dauerform mit einer Profilierung 7 und/oder mit
Zapfen 8 versehen sein. As can be seen from FIG. 4, the
Bei dem in Fig. 5 dargestellten Ausführungsbeispiel
weisen die Schichten 1 der Dauerform Entlüftungskanäle 6
auf.In the embodiment shown in FIG. 5
the
Claims (7)
- Process for integrating three-dimensionally shaped metal pipe work designed for tempering, in a permanent metal mould for master-pattern molding of metals or plastics under pressure, in the course of which the pipe work, at least to a great extent, is adapted to the three-dimensionality of the engraved area of the cavity (mould cavity),
characterized by the fact,- 1.1
- that the permanent metal mould or the mould body or die insert resp. to be cooled is dissected into a multitude of plane-parallel layers (1), such as rectangular, polygonal or cylinder plates, which are dimensioned so that the subsequent engraving (3) of the various layers (1) is cut many times;
- 1.2
- that each layer (1) is provided with a minimum of one groove (4), in which connection the grooves (4) are arranged so that they coincide with the required arrangement of the cooling tubes (2) along the contour of the engraving (3) to be incorporated later;;
- 1.3
- that the cooling tubes (2) are introduced into the grooves (4) and fixed in the grooves (4);
- 1.4
- that the layers (1) are arranged and fixed in the correct order and in exact layers to form the whole mould, and then the layers are fixed;
- 1.5
- that the layers (1) thus put together and fixed, are encapsulated in a gas tight sheet metal container (5) enclosing the whole mould on all sides, with the sheet metal container (5) being provided in the area of the protruding cooling tubes (2) with adequate openings through the cooling tubes (2);
- 1.6
- that the air in the sheet metal container (3) is evacuated completely, and the sheet metal container (3) is then closed gas tight;
- 1.7 and that the sheet metal container (5) is subject to hot isostatic pressing so that the individual layers (1) are diffusion welded amongst each other and with the cooling tubes (2).
- A process according to Claim 1, characterized by the fact that between the layers (1) put together and fixed, and the sheet metal container (5) a metallic or ceramical powder bed is introduced.
- A process according to Claim 1 or 2, characterized by the fact that, before closing, the sheet meal container (5) is scavenged with inert gas, preferably with nitrogen before being closed, and that the closing of the sheet metal container (5) is effected under inert gas.
- A process according to Claim 3, characterized by the fact that the closing of the sheet metal container (5) is effected under ambient pressure.
- A process according to one of the Claims 1 through 4, characterized by the fact that the dissecting of the permanent mould of the mould body or die insert resp. to be cooled, into layers (1) takes place both in the vertical and horizontal direction to the mould or die parting plane.
- A process according to one of the Claims 1 through 4, characterized by the fact that the dissecting of the permanent mould of the mould body or die insert respectively to be cooled, into layers (1) takes place both in the vertical and horizontal direction of the mould/die.
- A process according to one of the Claims 1 through 4, characterized by the fact that the dissection of the permanent mould of the mould body or die insert respectively to be cooled, in layers (1) is effected in any optional plane in the space.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19819592 | 1998-04-30 | ||
DE19819592A DE19819592C1 (en) | 1998-04-30 | 1998-04-30 | Method for introducing pipes into a metal die |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0953392A1 EP0953392A1 (en) | 1999-11-03 |
EP0953392B1 true EP0953392B1 (en) | 2003-08-27 |
Family
ID=7866450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99103744A Expired - Lifetime EP0953392B1 (en) | 1998-04-30 | 1999-02-26 | Process for making permanent moulds |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0953392B1 (en) |
AT (1) | ATE248040T1 (en) |
DE (2) | DE19819592C1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006032593B4 (en) * | 2006-07-14 | 2009-11-05 | Dörrenberg Edelstahl GmbH | Method for the production of internal cooling channels having tools |
DE102011052062A1 (en) * | 2011-07-22 | 2013-01-24 | MAGNOTEC Gmbh | Mold for casting a casting material, mold assembly with at least two molds, method for casting a casting material with such mold or mold assembly and a cast metal anode by this method |
FR3088998B1 (en) * | 2018-11-23 | 2021-01-08 | Commissariat A L Energie Atomique Et Aux Energies Alternatives | Method of making a heat exchanger module with at least one fluid circulation circuit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2811761A (en) * | 1954-11-04 | 1957-11-05 | Nat Lead Co | Split dies provided with cooling means |
JPS6188942A (en) * | 1985-09-21 | 1986-05-07 | Kuroki Kogyosho:Kk | Production of mold for continuous casting |
JPS6427919A (en) * | 1987-07-24 | 1989-01-30 | Mitsubishi Heavy Ind Ltd | Production of mold |
JP2643354B2 (en) * | 1988-09-12 | 1997-08-20 | トヨタ自動車株式会社 | Manufacturing method of mold in cooling water channel |
DE4426544A1 (en) * | 1994-07-27 | 1996-02-01 | Thyssen Industrie | Prodn. of a hollow channel in a die-casting mould |
-
1998
- 1998-04-30 DE DE19819592A patent/DE19819592C1/en not_active Expired - Fee Related
-
1999
- 1999-02-26 EP EP99103744A patent/EP0953392B1/en not_active Expired - Lifetime
- 1999-02-26 DE DE59906724T patent/DE59906724D1/en not_active Expired - Fee Related
- 1999-02-26 AT AT99103744T patent/ATE248040T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE19819592C1 (en) | 1999-06-10 |
DE59906724D1 (en) | 2003-10-02 |
EP0953392A1 (en) | 1999-11-03 |
ATE248040T1 (en) | 2003-09-15 |
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