EP1193008B1 - Process for producing a casting vessel and casting vessel - Google Patents

Process for producing a casting vessel and casting vessel Download PDF

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Publication number
EP1193008B1
EP1193008B1 EP00117320A EP00117320A EP1193008B1 EP 1193008 B1 EP1193008 B1 EP 1193008B1 EP 00117320 A EP00117320 A EP 00117320A EP 00117320 A EP00117320 A EP 00117320A EP 1193008 B1 EP1193008 B1 EP 1193008B1
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EP
European Patent Office
Prior art keywords
riser
casting
core
region
casting vessel
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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.)
Expired - Lifetime
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EP00117320A
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German (de)
French (fr)
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EP1193008A1 (en
Inventor
Roland Fink
Norbert Dr.-Ing. Erhard
Herbert Schulte
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Oskar Frech GmbH and Co KG
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Oskar Frech GmbH and Co KG
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Application filed by Oskar Frech GmbH and Co KG filed Critical Oskar Frech GmbH and Co KG
Priority to DE50000293T priority Critical patent/DE50000293D1/en
Priority to ES00117320T priority patent/ES2177495T3/en
Priority to AT00117320T priority patent/ATE220587T1/en
Priority to EP00117320A priority patent/EP1193008B1/en
Publication of EP1193008A1 publication Critical patent/EP1193008A1/en
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Publication of EP1193008B1 publication Critical patent/EP1193008B1/en
Priority to HK02105407.4A priority patent/HK1043756B/en
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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
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines

Abstract

Production of a casting container (1) comprises casting the container from a creep resistant tool steel in one piece; and inserting a casting chamber (2) and a riser (3). The region of the riser is produced by placing a smooth walled core (15) made of a ceramic material into the mold and removing to form the riser. Independent claims are also included for: (a) the casting container produced; and (b) the ceramic core for producing the riser. Preferred Features: The core is made of 75-85 wt.% SiO2 and 15-25 wt.% ZrSiO4.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Gießbehälters, insbesondere für Warmkammer-Druckgießmaschinen, indem der Gießbehälter insbesondere aus einem warmfesten Werkzeugstahl einstückig gegossen wird, wobei zumindest eine Gießkammer und zumindest eine Steigleitung eingebracht werden. Die Erfindung betrifft auch den durch das Verfahren hergestellten Gießbehälter und einen Kern zur Herstellung der Steigleitung.The invention relates to a method for producing a Casting container, in particular for hot chamber die casting machines, by placing the pouring container in particular from a heat-resistant Tool steel is cast in one piece, at least one Casting chamber and at least one riser are introduced. The invention also relates to the one produced by the method Casting container and a core for the production of Riser.

Der DE-A 21 43 937 ist ein Gießbehälter für eine Warmkammer-Druckgießmaschine zu entnehmen, der eine einen Druckkolben aufnehmende Druckkammer und eine sich daran anschließende zu einem Mundstück führende Steigbohrung besitzt. Der Gießbehälter ist ein Gussteil aus einem warmfesten Werkzeugstahl. Die Steigbohrung ist mit Hilfe von eingelegten Sandkernen eingegossen. Um dies zu ermöglichen, ist die Steigbohrung an einem Ende axial aus dem Gießbehälter herausgeführt und wird dort durch eine eingesetzte Schraube verschlossen. Die Verbindung zur Gießkammer erfolgt über einen senkrecht zur Steigbohrung verlaufenden Kanal, der ebenfalls durch einen eingelegten Kern hergestellt wurde und nach außen auch durch eine Schraube verschlossen werden muss. Sowohl die Steigbohrung als auch der Querkanal müssen daher in relativ aufwendiger Weise bearbeitet werden. Infolge des rechtwinkligen Überganges von dem Verbindungskanal zur Steigbohrung in Verbindung mit dem auch im Bereich des Mundstückes vorgesehenen, etwa rechtwinkligen Übergang entstehen Druckverluste für die fließende Schmelze, die sich nachteilig auf die Arbeitsgeschwindigkeit auswirkt.DE-A 21 43 937 is a casting container for a hot chamber die casting machine can be seen in the one a pressure piston receiving pressure chamber and an adjoining one has a riser hole leading a mouthpiece. The pouring can is a casting made from a heat-resistant tool steel. The The riser hole is cast in with the help of inserted sand cores. To make this possible, the riser hole is on one End axially out of the casting tank and is there closed by an inserted screw. The connection to the casting chamber takes place via a perpendicular to the riser hole extending channel, which is also by an inserted Core was made and externally also by a screw must be closed. Both the riser hole as well the cross channel must therefore be processed in a relatively complex manner become. As a result of the right angle transition from that Connection channel to the riser hole in connection with the too provided in the area of the mouthpiece, approximately rectangular Transition creates pressure losses for the flowing melt, which adversely affects the speed of work.

Um dieses Problem zu überwinden, wurde in der DE-A 39 17 487 ein Gießbehälter für Warmkammer-Druckgießmaschinen vorgeschlagen, bei dem als Steigbohrung ein eingegossenes, im Bereich der Mündung zur Gießkammer und im Bereich des Mundstückes gebogenes Rohr vorgesehen wird, welches aus mindestens zwei Teilen zusammengeschweißt ist.To overcome this problem, DE-A 39 17 487 proposed a casting tank for hot chamber die casting machines, in which a cast hole is cast in the area the mouth to the casting chamber and in the area of the mouthpiece bent tube is provided, which consists of at least two parts are welded together.

Das Rohr selber ist im Verlauf seiner Erstreckung mit unterschiedlichen Wandstärken ausgebildet, die sich insbesondere im düsenseitig vorgesehenen Krümmer vergrößern. Hier hat sich als nachteilig erwiesen, dass es beim Umgießen des in die Form eingebrachten geschweißten Rohres im Bereich kleinerer Wandstärken zu temperaturbedingten Rissen kam. Da das Rohr, das zwar glatte Innenkonturen aufweist und somit eine strömungstechnisch günstige Umlenkung des Schmelzmateriales ermöglicht, aus mehreren Teilen besteht, müssen selbige in umständlicher Weise zunächst einmal positioniert und dann miteinander verbunden werden. Auch im Bereich der Schweißnähte kann es beim Umgießen des Rohres zu temperatur- und/oder spannungsbedingten Rissen kommen, wodurch wiederum Strömungsprobleme durch eingedrungenes Material des Gießbehälters in den Innenbereich der Steigbohrung kommen kann.The tube itself is different in the course of its extension Wall thicknesses, which are particularly enlarge in the elbow provided on the nozzle side. Here has proved to be disadvantageous that when it is cast around the Shape introduced welded pipe in the area of smaller Wall thicknesses caused by temperature-related cracks. Since the pipe, which has smooth inner contours and therefore a fluidic enables favorable deflection of the melting material, consists of several parts, the same must be cumbersome Positioned first and then together get connected. Also in the area of the weld seams it can be too temperature and / or when casting the pipe stress cracks occur, which in turn causes flow problems due to penetration of the material in the casting container the inside of the riser hole can come.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und einen Gießbehälter zu konzipieren, dessen Steigleitung ohne Verwendung von separaten Rohren und ohne größere Nachbearbeitungen herstellbar ist, der jedoch die gleichen strömungstechnischen günstigen Eigenschaften wie ein Rohr beinhaltet. Ferner soll ein Kern zur Realisierung der gewünschten Eigenschaften im Bereich der Steigleitung konzipiert werden. The invention has for its object a method and to design a casting tank, the riser without Use of separate pipes and without major rework can be produced, but the same fluidic favorable properties like a pipe. Furthermore, a core is to realize the desired properties be designed in the area of the riser.

Dieses Ziel wird dadurch erreicht, dass zumindest der Bereich der Steigleitung durch Einlegen eines aus einem Keramikmantel gebildeten, im wesentlichen glattwandigen Kernes in die Form erzeugt wird, der im Anschluss an die Guss- und Ausformphase zur Bildung der Steigleitung aus dem Gussbehälter entfernt wird.This goal is achieved by at least the area the riser pipe by inserting a ceramic jacket formed, essentially smooth-walled core in the form is generated after the casting and molding phase removed from the cast container to form the riser becomes.

Es hat sich in überraschender Weise gezeigt, dass ein solcher glattwandiger Keramikkern die Herstellung der Steigbohrung in solcher Qualität ermöglicht, dass die Strömungsverhältnisse für die Schmelze mindestens jenen entsprechen, die durch eingegossene Rohre erzielbar sind. Dadurch, dass keine Schweißstellen wie bei eingegossenen und zusammengesetzten Rohren auftreten, ist ein durchgehender strömungsfreier Strömungsverlauf gesichert.It has surprisingly been shown that such a smooth-walled ceramic core the production of the riser hole in such quality allows the flow conditions for the melt at least correspond to those cast by Pipes are achievable. Because there are no welds as with cast and assembled pipes occur is a continuous flow-free flow secured.

Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind den zugehörigen verfahrensgemäßen Unteransprüchen zu entnehmen.Advantageous further developments of the subject matter of the invention are the associated procedural subclaims.

Dieses Ziel wird auch erreicht durch einen Gießbehälter, insbesondere für Warmkammer-Druckgießmaschinen, der insbesondere aus einem warmfesten Werkzeugstahl einstückig gegossen ist und zumindest eine Gießkammer sowie zumindest eine Steigleitung aufweist, die an ihrem einen Ende in eine Gießkammer mündet und an ihrem anderen Ende zur Aufnahme einer Spritzdüse in ein Mundstück ausläuft, wobei die Steigleitung durch Einbringung und Entfernung eines der Kontur der Steigleitung entsprechenden Keramikkernes hergestellt ist, und dass die Kontur der Steigleitung durch ineinanderübergehende geradlinige und gekrümmte Abschnitte gebildet ist.This goal is also achieved by a casting tank, in particular for hot chamber die casting machines, the particular is cast in one piece from a heat-resistant tool steel and at least one casting chamber and at least one riser has at one end in a casting chamber opens and at its other end for receiving a spray nozzle runs out into a mouthpiece, the riser through Insertion and removal of one of the contours of the riser corresponding ceramic core is made, and that the Contour of the riser through a straight line and curved sections is formed.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Gießbehälters sind den zugehörigen gegenständlichen Unteransprüchen zu entnehmen. Advantageous further developments of the casting container according to the invention are to the related substantive claims remove.

Dieses Ziel wird ebenfalls erreicht durch einen Keramikkern mit im wesentlichen glattwandiger Oberfläche zur Erzeugung einer Steigleitung im Bereich eines Gießbehälters, insbesondere für eine Warmkammer-Druckgießmaschine, bestehend aus ineinander übergehenden geradlinigen und gekrümmten Abschnitten, wobei die geradlinigen Abschnitte zumindest teilweise unterschiedliche Durchmesser aufweisen.This goal is also achieved through a ceramic core with an essentially smooth-walled surface for production a riser in the area of a casting tank, in particular for a hot chamber die casting machine, consisting of one inside the other merging straight and curved sections, the rectilinear sections at least partially have different diameters.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Keramikkernes sind den zugehörigen Unteransprüchen zu entnehmen.Advantageous further developments of the ceramic core according to the invention can be found in the associated subclaims.

Infolge des erfindungsgemäßen Herstellungsverfahrens sowie der gegenständlichen Ausgestaltung des Gießbehälters unter Verwendung des ebenfalls erfindungsgemäßen Keramikkernes ist es möglich, die gleichen strömungstechnischen Vorteile, wie bei der DE-A 39 17 487 gegeben, zu erzielen, ohne jedoch ein separates Rohr einsetzen zu müssen. Der Keramikkern kann an die Kontur der Steigleitung angepasst werden und besteht vorzugsweise aus einer Zusammensetzung (in Masse-%) von 75% bis 85% SiO2 sowie 15% bis 25% ZrSiO4. Der Keramikkern wird zur Erzeugung einer glattwandigen Oberfläche verpresst, wobei sich hier unterschiedliche Herstellungsverfahren (z.B. Kaltpressen) anbieten.As a result of the manufacturing process according to the invention and the physical design of the casting container using the ceramic core, which is also according to the invention, it is possible to achieve the same fluidic advantages as given in DE-A 39 17 487, but without having to use a separate tube. The ceramic core can be adapted to the contour of the riser and preferably consists of a composition (in mass%) of 75% to 85% SiO 2 and 15% to 25% ZrSiO 4 . The ceramic core is pressed to produce a smooth-walled surface, whereby different manufacturing processes (eg cold pressing) are available.

Am Kern wird vorzugsweise im Bereich der späteren Düse ein Ansatz angeformt, der nach dem Gießvorgang sich bis zur korrespondierenden Wand des Gießbehälters erstreckt und somit einen Zugang von außen zum Kern bietet. Durch zumindest teilweise Entfernung dieses Ansatzes kann nun das Restmaterial des Kernes, beispielsweise durch unter hohem Druck stehendes Wasser, entfernt bzw. ausgespült werden. Dadurch wird gleichzeitig die nun gebildete Steigleitung gesäubert, so dass keine Kernmaterialien mehr vorhanden sind. Die Steigleitung ist eine saubere Abbildung des Keramikkerns und weist auch sämtliche geradlinigen und gekrümmten Abschnitte auf. The core is preferably in the area of the later nozzle Approach formed, which after the casting process to the corresponding Wall of the casting tank extends and thus offers external access to the core. By at least in part Removal of this approach can now remove the residual material of the core, for example by high pressure Water, be removed or rinsed out. This will be simultaneous cleaned the riser now formed, so that none Core materials are more available. The riser is a clean image of the ceramic core and also shows all straight and curved sections.

Der Erfindungsgegenstand ist anhand eines Ausführungsbeispieles in der Zeichnung dargestellt und wird wie folgt beschrieben. Es zeigen:

Fig. 1
einen Längsschnitt durch einen Gießbehälter nach der Erfindung,
Fig. 2
eine Seitenansicht des Gießbehälters nach Fig. 1,
Fig. 3
die Ansicht des Gießbehälters der Fig. 1 von unten, teilweise im Schnitt,
Fig. 4
einen Längsschnitt durch einen Gießbehälter ähnlich Fig. 1, jedoch in einer etwas abgewandelten Form, und
Fig. 5
die Darstellung eines glattwandigen Keramikkerns zur Herstellung eines Gießbehälters nach Fig. 4.
The subject matter of the invention is illustrated in the drawing using an exemplary embodiment and is described as follows. Show it:
Fig. 1
2 shows a longitudinal section through a casting container according to the invention,
Fig. 2
2 shows a side view of the casting container according to FIG. 1,
Fig. 3
1 from the bottom, partially in section,
Fig. 4
a longitudinal section through a casting container similar to FIG. 1, but in a somewhat modified form, and
Fig. 5
the representation of a smooth-walled ceramic core for producing a casting container according to FIG. 4.

Die Fig. 1 bis 3 zeigen einen Gießbehälter 1, der in eine in der DE-A 39 17 487 beschriebene Warmkammer-Magnesium-Druckgießmaschine eingesetzt werden kann. Der Gießbehälter 1 beinhaltet eine Gießkammer 2, die unten durch einen eingesetzten Stopfen 21 verschlossen ist, sowie eine mit dieser verbundene Steigleitung 3. Die Steigleitung 3 ist im Bereich ihres einen Endes 4 mit einem geradlinigen Abschnitt 5 versehen, der in die Gießkammer 2 einmündet. Der Bereich 6 der Steigleitung 3 ist ebenfalls geradlinig ausgebildet und läuft etwa parallel zur Gießkammer 2. Im Bereich des anderen Endes 7 der Steigleitung 3 schließt sich wiederum ein geradliniger Abschnitt 8 an, der in ein Mundstück 9 zur Aufnahme einer nicht weiter dargestellten Düse ausläuft. Die Steigleitung 3 kann unter Verwendung eines in Fig. 4 dargestellten, kaltgepressten Keramikkernes der Zusammensetzung (in Masse-%) 80% SiO2 sowie 20% ZrSiO4 hergestellt werden, wobei der - anhand der Fig. 5 näher beschriebenen - Ansatz 17 anschließend an den Bereich 6' an der Oberseite vorgesehen wird. Zur Entfernung des Kernes wurde eine Bohrung 10 erzeugt, die mittels eines Stopfens 11 wieder verschließbar ist. Über Schweißnähte 11' wird der Stopfen 11 mit der Bohrungswand 10' verbunden. Der Stopfen 11 besteht hierbei vorzugsweise aus dem gleichen Material wie der Gießbehälter 1 selber. Die Innenkontur 12 des Stopfens 11 entspricht der inneren Kontur der Steigleitung. Die Bohrung 10 ist in diesem Beispiel im Bereich des Mundstückes 9 (gekrümmter Abschnitt 7) vorgesehen, kann jedoch auch an anderen Bereichen, z.B. in gekrümmten Abschnitten 4 des Gießbehälters 1 (siehe Fig. 4) angeordnet werden. Die Bohrung 10 erstreckt sich bis zur Außenwand 1' und ist demzufolge von außen zugänglich, um das Kernmaterial zu entfernen.1 to 3 show a casting container 1 which can be used in a hot chamber magnesium die casting machine described in DE-A 39 17 487. The casting container 1 contains a casting chamber 2, which is closed at the bottom by an inserted plug 21, and a riser pipe 3 connected to the latter. The area 6 of the riser 3 is also straight and runs approximately parallel to the casting chamber 2. In the area of the other end 7 of the riser 3 there is in turn a straight section 8 which ends in a mouthpiece 9 for receiving a nozzle, not shown. The riser 3, by using a cold-pressed ceramic core illustrated in Figure 4 of the composition (in% by mass) 80% SiO 2 and 20% ZrSiO 4 are produced, wherein the -. Then to approach 17 - with reference to Figure 5 in more detail above. the area 6 'is provided at the top. To remove the core, a bore 10 was created, which can be closed again by means of a plug 11. The plug 11 is connected to the bore wall 10 'via weld seams 11'. The stopper 11 is preferably made of the same material as the casting container 1 itself. The inner contour 12 of the plug 11 corresponds to the inner contour of the riser. In this example, the bore 10 is provided in the area of the mouthpiece 9 (curved section 7), but can also be arranged in other areas, for example in curved sections 4 of the casting container 1 (see FIG. 4). The bore 10 extends to the outer wall 1 'and is therefore accessible from the outside to remove the core material.

Für die Fig. 4 gelten die vorstehenden Ausführungen ebenfalls. Gleiche Teile sind daher mit gleichen Bezugszeichen versehen. Unterschiedlich ist in Fig. 4 lediglich, dass die Bohrung 10 und demzufolge auch der Stopfen 11 nicht am oberen Ende der Steigleitung 3, sondern im unteren Bereich derselben angeordnet ist.The above statements also apply to FIG. 4. The same parts are therefore with the same reference numerals Mistake. The only difference in FIG. 4 is that the Bore 10 and therefore the plug 11 is not at the top End of the riser 3, but in the lower area of the same is arranged.

Die geradlinig verlaufenden Abschnitte, 5, 6, 8 sind in beiden Fällen durch gekrümmte Abschnitte 13, 14 miteinander verbunden. Die geradlinig verlaufenden Abschnitte 5, 6, 8 weisen unterschiedliche Durchmesser auf. So kann z.B. der geradlinige Abschnitt 5 einen Durchmesser von 20mm, der geradlinige Abschnitt 6 einen Durchmesser von 18mm und der geradlinige Abschnitt 8 einen Durchmesser von 17mm aufweisen. Die Angleichung an die unterschiedlichen Durchmesser erfolgt über die gekrümmten Abschnitte 13 und 14. Da der geradlinige Abschnitt 5 unmittelbar ohne weitere Absätze in die Gießkammer 2 einmündet, werden hier keine den Strömungsfluss der Schmelze hindernde Kanten gebildet, so dass das Material problemlos dem Mundstück 9 sowie der sich daran anschließenden Düse zugeführt werden kann. Die Arbeitsgeschwindigkeit kann gegenüber dem Stand der Technik wesentlich erhöht werden, wobei keine Beschädigungen im Bereich der so erzeugten Steigleitung 3 auftreten können, wie es beim Stand der Technik gemäß DE-A 39 17 487 unter Verwendung eines Rohres möglich wäre. Der Gießbehälter 1 besteht vorzugsweise aus einem warmfesten Werkzeugstahl.The rectilinear sections 5, 6, 8 are in both Cases interconnected by curved sections 13, 14. The straight sections 5, 6, 8 have different diameters. For example, the straightforward Section 5 a diameter of 20mm, the straight line Section 6 a diameter of 18mm and the straight line Section 8 have a diameter of 17mm. The approximation to the different diameters takes place over the curved sections 13 and 14. Since the rectilinear section 5 opens directly into the casting chamber 2 without further paragraphs, here are no the flow flow of the melt obstacles formed edges, so that the material easily the mouthpiece 9 and the adjoining nozzle can be. The working speed can be opposite the prior art can be significantly increased, wherein no damage in the area of the riser 3 can occur, as in the prior art according to DE-A 39 17 487 would be possible using a tube. The Casting container 1 preferably consists of a heat-resistant Tool steel.

Fig. 5 zeigt nun einen Keramikkern 15 in der Zusammensetzung (in Masse-%) 80% SiO2 und 20% ZrSiO4. Die Oberfläche 16 des Keramikkernes 15 ist glattwandig ausgebildet, so dass auch glattwandige Konturen im Bereich des Steigrohres 2 gebildet werden. Die Querschnittsform des Keramikkernes 15 ist etwa S-förmig ausgebildet, wobei geradlinig geformte Abschnitte 5', 6', 8' vorhanden sind, die über gekrümmte Abschnitte 13', 14' miteinander verbunden sind. Der Keramikkern 15 verfügt über einen Ansatz 17, der in Verlängerung des geradlinigen Abschnittes 6' vorgesehen ist. Der Ansatz 17 weist einen konisch in Richtung des gekrümmten Abschnittes 13' verlaufenden Bereich 18 auf, wobei der verbleibende Bereich 19 etwa zylindrisch ausgebildet ist.5 now shows a ceramic core 15 in the composition (in mass%) 80% SiO 2 and 20% ZrSiO 4 . The surface 16 of the ceramic core 15 is smooth-walled, so that smooth-walled contours are also formed in the region of the riser pipe 2. The cross-sectional shape of the ceramic core 15 is approximately S-shaped, with straight-shaped sections 5 ', 6', 8 'being provided which are connected to one another via curved sections 13', 14 '. The ceramic core 15 has an extension 17 which is provided in the extension of the straight section 6 '. The projection 17 has a region 18 which runs conically in the direction of the curved section 13 ', the remaining region 19 being approximately cylindrical.

Abweichend zu einem Keramikkern, wie er zur Herstellung eines Gießbehälters nach Fig. 1 vorgesehen wäre, ist der Ansatz 17 nicht düsenseitig, sondern gießkammerseitig vorgesehen. Die Lage des Ansatzes 17 ist zunächst einmal in jedem Bereich des Gießkernes 15 denkbar, sollte jedoch vorzugsweise zur besseren Entfernung des Kernmaterials nach Fertigstellung des Gießbehälters 1 in der Verlängerung der Mittelachse 20 des geradlinigen Abschnittes 6'' angeordnet sein. Nach Fertigung des Gießbehälters 1 wird zumindest ein Teilbereich des Ansatzes 17 entfernt, so dass nun beispielsweise eine Einrichtung an- bzw. aufgesetzt werden kann, die mit hohen Drucken Wasser in den Bereich des verbleibenden Kernmaterials führt und selbigen zertrümmert. Die zertrümmerten Kernstücke bzw. Partikel werden entweder in den Bereich der Gießkammer 2 oder aus dem Mundstück 9 herausgedrückt. Somit wird gleichzeitig auch die so entstandene Steigleitung gereinigt. Der verdickte Bereich 9' bildet das spätere Mundstück 9 zur Aufnahme der Düse. Der geradlinig verlaufende Abschnitt 8' in Verbindung mit dem verdickten Bereich 9' steht nicht rechtwinklig auf der Mittelachse 20, sondern wird spitzwinklig, beispielsweise unter einem Winkel von 5°, dazu geführt. Dadurch entsteht zwischen der Achse 20 des geradlinigen Abschnittes 6' und der Achse 22 des Abschnittes 8' ein stumpfer Winkel α. Die Mittelachse 21 des geradlinigen Abschnittes 5' steht senkrecht auf der Mittelachse 20 des Abschnittes 6'.Deviating from a ceramic core, such as that used to manufacture a 1 would be provided, the approach 17th not on the nozzle side, but on the casting chamber side. The Location of the approach 17 is first in each area of the Gießkernes 15 conceivable, but should preferably for better Removal of core material after completion of the Casting container 1 in the extension of the central axis 20 of the rectilinear section 6 ''. After manufacturing of the casting container 1 becomes at least a portion of the approach 17 removed, so that now for example a device can be put on or put on with high pressure water leads into the area of the remaining core material and the same smashed. The smashed core pieces or particles are either in the area of the casting chamber 2 or from the Mouthpiece 9 pushed out. Thus, the the resulting riser cleaned. The thickened area 9 'forms the future mouthpiece 9 for receiving the nozzle. The rectilinear section 8 'in connection with the thickened area 9 'is not at right angles on the central axis 20, but becomes acute, for example under at an angle of 5 °. This creates between the axis 20 of the straight section 6 'and the axis 22 of section 8 'an obtuse angle α. The central axis 21 of the straight section 5 'is perpendicular to the central axis 20 of section 6 '.

Claims (20)

  1. Process for the manufacture of a gooseneck (1), especially for hot-chamber magnesium pressure-diecasting machines, in which the gooseneck (1) is especially cast in one piece from a high-temperature tool steel, at least one casting chamber (2) and at least one riser (3) being formed, characterised in that at least the region of the riser (3) is produced by inserting into the mould a substantially smooth-walled core (15) formed from a ceramic material, which core (15) is removed from the casting vessel (1) to form the riser (3) following the casting and shaping phase.
  2. Process according to claim 1, characterised in that cores (15) having the composition (in % by mass) from 75 % to 85 % SiO2 and from 15 % to 25 % ZrSiO4 are used.
  3. Process according to claim 1 or 2, characterised in that, for forming core-removal bores (10) in the region of the gooseneck (1), at least one extension (17) is integrally formed on the respective core (15), especially as a continuation of the portion (6) forming the subsequent riser (3).
  4. Process according to any one of claims 1 to 3, characterised in that the core (15) is provided with rectilinear portions (5', 6', 8') and bent portions (13', 14') to produce predeterminable contours of the riser (3), at least some of the rectilinear portions (5', 6', 8') joined to one another by bent portions (13', 14') not being arranged at a right angle to one another.
  5. Process according to any one of claims 1 to 4, characterised in that the core (15) is provided with different diameters in the region of at least some of its rectilinear portions (5', 6', 8'), adaptation being effected by the bent portions (13', 14').
  6. Process according to any one of claims 1 to 5, characterised in that the core (15) is removed by at least partial removal of the extension (17) and subsequent shattering of the remaining region(s), especially by water under high pressure.
  7. Process according to any one of claims 1 to 6, characterised in that a stopper (11) is employed to seal the bore (10) formed by the extension, which stopper (11) is provided, in the region of the riser (3), with the respective internal contour (12) thereof.
  8. Process according to any one of claims 1 to 7, characterised in that the stopper (11) is made by casting, especially from the same material as the casting vessel (1).
  9. Process according to any one of claims 1 to 8, characterised in that the stopper (11) is placed in the correct position and then joined to the casting vessel (1), especially by welding (11').
  10. Casting vessel, especially for hot-chamber pressure-diecasting machines, which is especially cast in one piece from a high-temperature tool steel and has at least one casting chamber (2) and at least one riser (3) which opens into the casting chamber (2) at its one end (4) and ends in a mouthpiece (9) at its other end (7) for receiving an injection nozzle, characterised in that the riser (3) is produced by introducing and removing a ceramic core (15) corresponding to the contour of the riser (3), and the contour of the riser (3) is formed by rectilinear portions (5, 6, 8) and bent portions (13, 14) which merge one into another.
  11. Casting vessel according to claim 10, characterised in that the riser (3) is provided with a sealable bore (10) which extends in the direction of an outside wall (1') of the casting vessel (1).
  12. Casting vessel according to claim 10 or 11, characterised in that the bore (10) forms the continuation of the longer rectilinear portion (6).
  13. Casting vessel according to any one of claims 10 to 12, characterised in that the bore (10) is provided in the region of the mouthpiece (9) for receiving the injection nozzle.
  14. Casting vessel according to any one of claims 10 to 13, characterised in that the bore (10) is sealable by a stopper (11) which can be fixed therein, especially by welding (11'), and which is provided, on the side towards the riser, with the respective internal contour (12) in that region of the riser (3).
  15. Casting vessel according to any one of claims 10 to 14, characterised in that at least some of the portions (5, 6, 8) of the riser (3) that extend in a straight line are provided with different diameters, it being possible for adaptation to be effected by the respective bent portions (13, 14).
  16. Ceramic core having a substantially smooth-walled surface (16) for producing a riser (3) in the region of a casting vessel (1), especially for a hot-chamber pressure-diecasting machine, consisting of rectilinear portions (5', 6', 8') and bent portions (13', 14') which merge one into another, at least some of the rectilinear portions (5', 6', 8') having different diameters.
  17. Ceramic core according to claim 16, characterised by an extension (17) in the region of one of the bent portions (13', 14'), which extension (17) extends in a straight line.
  18. Ceramic core according to claim 16 or 17, characterised in that the extension (17) is provided as an extension of the longer rectilinear portion (6').
  19. Ceramic core according to any one of claims 16 to 18, characterised in that the core (15) consists of (in % by mass) from 75 % to 85 % SiO2 and from 15 % to 25 % ZrSiO4 and is made by pressing.
  20. Ceramic core according to any one of claims 16 to 19, characterised in that at least one of the rectilinear portions (8') is provided at an obtuse angle (α) to the central line (20) of a further rectilinear portion (6').
EP00117320A 2000-08-21 2000-08-21 Process for producing a casting vessel and casting vessel Expired - Lifetime EP1193008B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50000293T DE50000293D1 (en) 2000-08-21 2000-08-21 Process for producing a casting container and casting container
ES00117320T ES2177495T3 (en) 2000-08-21 2000-08-21 PROCEDURE FOR THE MANUFACTURE OF A COLADA CONTAINER AND COLADA CONTAINER.
AT00117320T ATE220587T1 (en) 2000-08-21 2000-08-21 METHOD FOR PRODUCING A CASTING CONTAINER AND CASTING CONTAINER
EP00117320A EP1193008B1 (en) 2000-08-21 2000-08-21 Process for producing a casting vessel and casting vessel
HK02105407.4A HK1043756B (en) 2000-08-21 2002-07-22 Process for producing a casting vessel and casting vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00117320A EP1193008B1 (en) 2000-08-21 2000-08-21 Process for producing a casting vessel and casting vessel

Publications (2)

Publication Number Publication Date
EP1193008A1 EP1193008A1 (en) 2002-04-03
EP1193008B1 true EP1193008B1 (en) 2002-07-17

Family

ID=8169502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00117320A Expired - Lifetime EP1193008B1 (en) 2000-08-21 2000-08-21 Process for producing a casting vessel and casting vessel

Country Status (5)

Country Link
EP (1) EP1193008B1 (en)
AT (1) ATE220587T1 (en)
DE (1) DE50000293D1 (en)
ES (1) ES2177495T3 (en)
HK (1) HK1043756B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143937B2 (en) * 1971-09-02 1977-05-18 Oskar Frech, Werkzeugbau, 7061 Weiler CASTING CONTAINER FOR A HOT CHAMBER DIE CASTING MACHINE
DE3917487A1 (en) * 1989-05-30 1990-12-06 Frech Oskar Gmbh & Co CASTING CONTAINER FOR WARM CHAMBER DIE CASTING MACHINES
US5779809A (en) * 1995-12-26 1998-07-14 General Electric Company Method of dissolving or leaching ceramic cores in airfoils

Also Published As

Publication number Publication date
ES2177495T3 (en) 2002-12-16
ATE220587T1 (en) 2002-08-15
HK1043756A1 (en) 2002-09-27
HK1043756B (en) 2003-01-24
EP1193008A1 (en) 2002-04-03
DE50000293D1 (en) 2002-08-22

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