EP3100801B1 - Method and device for producing casting moulds with at least one side feeder system - Google Patents

Method and device for producing casting moulds with at least one side feeder system Download PDF

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Publication number
EP3100801B1
EP3100801B1 EP16171209.6A EP16171209A EP3100801B1 EP 3100801 B1 EP3100801 B1 EP 3100801B1 EP 16171209 A EP16171209 A EP 16171209A EP 3100801 B1 EP3100801 B1 EP 3100801B1
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Prior art keywords
frame
casting
feeder system
model
casting model
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EP16171209.6A
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German (de)
French (fr)
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EP3100801A1 (en
Inventor
Jörg Schäfer
Thomas Schäfer
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GTP Schaefer Giesstechnishe Produkte GmbH
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GTP Schaefer Giesstechnishe Produkte GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088—Feeder heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/084—Breaker cores

Definitions

  • the invention relates to a side feed system for use in molds in which a molding cavity imaging casting model is formed, wherein the side feed system having an inner feeder cavity feeder and a connecting channel to the casting model or the mold cavity having feeder and the main axis of the connecting channel at an angle to the main axis of the feeder runs, and wherein in the connecting channel a consisting of a refractory material mesh-like fabric is arranged.
  • the feeders In the foundry industry, it is often necessary to arrange additional feeders in the molds, which fill with the casting of the casting with the liquid metal and compensate for the solidification of the casting occurring volume deficiencies in order to prevent a voids formation in the casting.
  • the feeders must be such that the liquid metal fed therein solidifies later than the casting, so that during the solidification process, a material transport can take place towards the casting, which tightly feeds the casting.
  • the feeders consist of an exothermic and / or insulating material or are shaped as so-called natural feeders in the mold sand enclosing the casting model.
  • the feeders are arranged with an arbitrary geometric shape at the point to be fed of the later casting on the casting model and firmly formed or formed during the preparation of the mold by compaction of the introduced molding sand.
  • cavities are created during molding of the casting model by means of the molding sand into which individual, consisting of an exothermic and / or insulating material feeders are subsequently used and thereby connected to the created by the demolding of the casting mold cavity.
  • the feeders are distinguished in so-called head feeders, which are arranged on the G confusemodellober Structure or the later casting, and in so-called side feeders, which are positioned for example due to the inaccessibility of upper feed points laterally to the casting model or later mold cavity and this on the one hand an inner feeder cavity forming feeder and a feed channel having a connection channel to the casting model, wherein the main axis of the connection channel extends at an angle to the main axis of the feeder.
  • This feeder dome is formed when creating the mold by means of a corresponding model in the molding sand of the mold or also consists of a separate, made of an exothermic and / or insulating material molding.
  • Such a side feed system is for example from the DE 84 18 911.8 U1 known.
  • a filter fabric is turned on.
  • the filter fabric is held in a frame made of sand, which is formed in the molding sand during the production of the mold.
  • the invention is therefore an object of the invention to provide a side feed system having the features mentioned, a frame for use with such a side feed system and a method for producing molds containing such a side feed system, in which each of the net-like fabric provides a low flow resistance for the liquid metal and yet limits the occurrence of existing after casting on the casting and to be removed by cleaning metal residues.
  • the invention initially provides a side feed system in which the net-like fabric has a through-hole and is clamped in a frame made of a heat-resistant material between the casting-model-side end of the connection channel and the casting model or the mold cavity.
  • the invention has the advantage that due to the net-like fabric spanned in the frame, these frames can be reliably handled as a separate component in the production of the casting mold and can be positioned together with the formation of the side feed system in the immediate vicinity of the casting mold or mold cavity.
  • the arrangement of the frame allows tension and retention of the net-like Fabric in the frame regardless of the strength of the molding sand at the positioning of the net-like fabric.
  • the use of a frame made of a heat-resistant material for holding the tensioned net-like fabric also has the advantage that the frame is not melted by the hot metal flowing through the mold and thus do not create harmful for the casting process combustion gases.
  • a frame suitable for use with the side feed system according to the invention has one according to an embodiment of the invention conically narrowing contour, wherein the net-like tissue is fixed to the narrowing and during molding in the mold to the casting model or the mold cavity side facing the frame.
  • the net-like tissue comes to lie in the positioning of the frame very close to the G confusemodellkontur, while can be used on the located on the widening side of the frame frame part for the determination of the frame in the mold.
  • the frame consists of two mutually movable subframe, which are fixed against each other after application of the required tension of the net-like fabric.
  • this through-hole has a smaller dimension than the cross-section of the connecting channel located in the feeder lower part.
  • the through hole has an area of 10 to 50 percent of the area enclosed by the frame surface of the connecting channel, wherein the mesh width, that is, the width of the mesh openings, 1 to 20 mm at a Width of the net structure forming threads from 1 to 15 mm.
  • the through hole is arranged centrally in the frame and located centrally due to the positioning of the frame in the connecting channel of the feeder dome.
  • the frame may be made of metal, ceramic or a refractory material as each heat-resistant material.
  • the frame together with the side feed system before creating the mold by molding the casting model on a casting model supporting the model plate on the casting model is positioned and molded together with the casting model and the side feed system when creating the mold.
  • the casting mold is produced by jointly molding the casting model with the side feeder system positioned thereon, a recess for the subsequent insertion of the frame is formed.
  • Fig. 1 Initially, only the schematic arrangement of the parts to be introduced in a possibly divided mold box for a mold to be produced parts such as casting model 10, side feed system 11 and the not shown net-like fabric holding frame 16 to each other visible.
  • the aforementioned arrangement is placed on a model plate 19.
  • the parts mentioned are arranged in their technically necessary assignment to each other either in the mold box and by filling the mold box or the mold box halves with molding sand or molded, or it is only the casting model molded in the molding box, whereby by accordingly additional moldings recesses are made in the molding sand, in which then the frame and the side feed system are arranged.
  • the side feed system 11 consists of a feeder 12 having an inner feeder cavity 13 and a feeder cup 14 having a connection channel 15, which is arranged with its connection channel 15 so that a connection between the after removal of the casting model 10 from the not shown Form box existing and to be filled during casting with the hot metal mold cavity and the inner feeder cavity 13 of the feeder 12 is given.
  • a connection between the after removal of the casting model 10 from the not shown Form box existing and to be filled during casting with the hot metal mold cavity and the inner feeder cavity 13 of the feeder 12 is given.
  • net-like fabric having a through hole as a passage for the connecting channel 15 of the feeder dome 14 flowing hot metal.
  • the frame 16 is thereby arranged as close as possible to the casting model 10 or the mold cavity produced thereby, which is supported by the conically narrowing contour of the frame, as far as the narrowing side of the frame 16 faces the casting mold 10 and the mold cavity and the net-like fabric is fixed to the narrowing side of the frame 16.
  • the frame may be made of metal, ceramic or a refractory material.
  • Fig. 2 to 4 is the frame 16 consisting of two sub-frames 24, 26 shown in its design, but without the net-like tissue to be held by the frame 16.
  • the first sub-frame 24 is shown, which forms the outer sub-frame of the two-part frame 16, wherein from Fig. 3 the second sub-frame 26 can be seen, which is so far identical to the first sub-frame 24, but in its dimensions designed such that the second sub-frame 26 in the first sub-frame 24 can be inserted or inserted, wherein the (not shown) reticulate Tissue between the two sub-frames 24 and 26 is inserted and tensioned accordingly.
  • Each sub-frame 24, 26 consists of three circumferential sides frame legs 20 and each forms a U-shaped configuration, wherein the open end of the U-shaped frame legs 20 is closed by a flat connecting leg 27, so that each sub-frame 24, 26 in is designed to be stable.
  • the two subframes each have a conical shape by the frame legs 20 are each placed obliquely so that the lower edge 21 of the frame legs 20 surrounds a smaller area than the upper edge 22 of the frame legs 20.
  • the enclosed by the lower edge of the frame legs 21 The surface is then closed by the net-like fabric inserted between the sub-frames 24, 26, which means that the net-like fabric is arranged on the conically narrowing side of the frame 16 in the finished frame 16.
  • the fixing the frame 16 is used.
  • three fixing openings 28 are formed on the two opposite frame legs 20 of the two sub-frames 24 and 26, which allow a fixation of the frame 16 on the model structure or in molding sand.
  • the molding sand penetrate the fixing holes and thus ensure a positive connection between the frame 16 and the molding sand. It is also conceivable to beat fixing nails 28 through the fixing openings in order to anchor the frame 16 in the foundry sand or else on the model structure.

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

Description

Die Erfindung betrifft ein Seitenspeisersystem zum Einsatz in Gießformen, in denen ein einen Formhohlraum abbildendes Gießmodell eingeformt ist, wobei das Seitenspeisersystem einen einen inneren Speiserhohlraum ausbildenden Speiser und eine einen Verbindungskanal zum Gießmodell beziehungsweise dem Formhohlraum aufweisende Speiserkalotte aufweist und die Hauptachse des Verbindungskanals im Winkel zur Hauptachse des Speisers verläuft, und wobei in dem Verbindungskanal ein aus einem feuerfesten Material bestehendes netzartiges Gewebe angeordnet ist.The invention relates to a side feed system for use in molds in which a molding cavity imaging casting model is formed, wherein the side feed system having an inner feeder cavity feeder and a connecting channel to the casting model or the mold cavity having feeder and the main axis of the connecting channel at an angle to the main axis of the feeder runs, and wherein in the connecting channel a consisting of a refractory material mesh-like fabric is arranged.

In der Gießereitechnik ist es häufig notwendig, in den Gießformen zusätzliche Speiser anzuordnen, die sich beim Abguss des Gussstückes mit dem flüssigen Metall füllen und bei der Erstarrung des Gussstücks auftretende Volumendefizite ausgleichen, um eine Lunkerbildung im Gussstück zu verhindern. Dazu müssen die Speiser so beschaffen sein, dass das darin eingespeiste flüssige Metall später als das Gussstück erstarrt, damit während des Erstarrungsvorganges ein Materialtransport zum Gussstück hin stattfinden kann, der das Gussstück dichtspeist. Hierzu bestehen die Speiser aus einem exothermen und/oder isolierenden Material oder werden als sogenannte Naturspeiser in dem das Gießmodell einschließenden Formsand ausgeformt. Im Rahmen von bekannten Verfahren zur Herstellung von mit Speisern zu versehenden Gießformen werden die Speiser mit einer beliebigen geometrischen Form an der zu speisenden Stelle des späteren Gussstücks an dem Gießmodell angeordnet und bei der Erstellung der Gießform durch Verdichtung des eingebrachten Formsandes fest eingeformt bzw. ausgeformt. Bei einem anderen Verfahren werden beim Abformen des Gießmodells mittels des Formsandes Hohlräume geschaffen, in welche einzelne, aus einem exothermen und/oder isolierenden Material bestehende Speiser nachträglich eingesetzt werden und dadurch an den durch das Entformen des Gießmodells geschaffenen Formhohlraum angeschlossen sind. Dabei werden die Speiser in sogenannte Kopfspeiser, die auf der Gießmodelloberfläche beziehungsweise dem späteren Gussteil angeordnet sind, und in sogenannte Seitenspeiser unterschieden, die beispielsweise aufgrund der Unzugänglichkeit von oberen Speisepunkten seitlich zum Gießmodell beziehungsweise späteren Formhohlraum positioniert werden und hierzu einerseits einen einen inneren Speiserhohlraum ausbildenden Speiser und eine einen Verbindungskanal zum Gießmodell aufweisende Speiserkalotte aufweisen, wobei die Hauptachse des Verbindungskanals im Winkel zur Hauptachse des Speisers verläuft. Diese Speiserkalotte wird beim Erstellen der Gießform mittels eines entsprechenden Modells in dem Formsand der Gießform ausgeformt oder besteht ebenfalls aus einem gesonderten, aus einem exothermen und/oder isolierenden Material hergestellten Formteil. Ein derartiges Seitenspeisersystem ist beispielsweise aus der DE 84 18 911.8 U1 bekannt.In the foundry industry, it is often necessary to arrange additional feeders in the molds, which fill with the casting of the casting with the liquid metal and compensate for the solidification of the casting occurring volume deficiencies in order to prevent a voids formation in the casting. For this purpose, the feeders must be such that the liquid metal fed therein solidifies later than the casting, so that during the solidification process, a material transport can take place towards the casting, which tightly feeds the casting. For this purpose, the feeders consist of an exothermic and / or insulating material or are shaped as so-called natural feeders in the mold sand enclosing the casting model. In the context of known methods for producing molds to be provided with feeders, the feeders are arranged with an arbitrary geometric shape at the point to be fed of the later casting on the casting model and firmly formed or formed during the preparation of the mold by compaction of the introduced molding sand. In another method, cavities are created during molding of the casting model by means of the molding sand into which individual, consisting of an exothermic and / or insulating material feeders are subsequently used and thereby connected to the created by the demolding of the casting mold cavity. The feeders are distinguished in so-called head feeders, which are arranged on the Gießmodelloberfläche or the later casting, and in so-called side feeders, which are positioned for example due to the inaccessibility of upper feed points laterally to the casting model or later mold cavity and this on the one hand an inner feeder cavity forming feeder and a feed channel having a connection channel to the casting model, wherein the main axis of the connection channel extends at an angle to the main axis of the feeder. This feeder dome is formed when creating the mold by means of a corresponding model in the molding sand of the mold or also consists of a separate, made of an exothermic and / or insulating material molding. Such a side feed system is for example from the DE 84 18 911.8 U1 known.

Beim Einsatz von Speisern besteht generell das Problem, dass nach dem Abguss im Speiser jeweils erstarrtes Gussmaterial in Form von sogenannten Speiserresten verbleibt, die nach dem Entformen des Gussstücks entfernt werden müssen. Da die damit verbundenen Putzkosten teilweise wirtschaftlich erheblich ins Gewicht fallen, gibt es verschiedene Vorschläge, in der Verbindung zwischen Speiser und Gussstück Einschnürungen oder Kanten als Sollbruchstellen auszubilden, an denen die Speiserreste möglichst nahe an der Oberfläche des Gussstücks abgebrochen oder sonstwie entfernt werden können. Insbesondere Seitenspeisersystem müssen jedoch aufgrund der herrschenden thermischen Bedingungen über größere Verbindungen zum Formhohlraum bzw. dem späteren Gussstück verfügen, so dass zum Entfernen der entsprechenden Speiserreste bei Seitenspeisersystemen oft schwere Maschinen wie Sägen, Flexen oder hydraulische Scheren eingesetzt werden müssen.When using feeders there is generally the problem that after casting in the feeder each solidified casting material remains in the form of so-called food remains, which must be removed after removal of the casting. Since the associated cleaning costs sometimes economically significant weight, there are various proposals to form in the connection between the feeder and casting constrictions or edges as predetermined breaking points at which the food residues as close to the Surface of the casting can be canceled or otherwise removed. In particular side feed system must, however, have greater connections to the mold cavity or the subsequent casting due to the prevailing thermal conditions, so that heavy machines such as saws, flexing or hydraulic shears must often be used to remove the corresponding food residues in side feed systems.

Zur Schaffung von gewünschten Sollbruchstellen bei einem Seitenspeisersystem ist es aus der gattungsbildenden DE 41 00 949 A1 bekannt, in dem Verbindungskanal zwischen Gießmodell und einem Speiserraum ein netzartiges Gewebe anzuordnen. Dieses netzartige Gewebe soll in erster Linie einer guten Filtrierung des dadurch strömenden flüssigen Metalls dienen. Es ist hierzu auch darauf hingewiesen, dass ein derartiges Filtergewebe ein Wegbrechen eines Speiserrestes nach Beendigung des Gießvorganges erleichtert. Zur Positionierung des Filtergewebes in dem Verbindungskanal ist jedoch in der vorgenannten Druckschrift keine Aussage getroffen; jedenfalls ist das Filtergewebe mit Abstand zum Gießmodell beziehungsweise dem Formhohlraum angeordnet. Auch ist davon auszugehen, dass das sich über die gesamte Fläche des Verbindungskanals erstreckende Filtergewebe die Metallströmung im Verbindungskanal hindert.To create desired breaking points in a side feed system, it is of the generic type DE 41 00 949 A1 known to arrange a net-like fabric in the connecting channel between the casting model and a feeder room. This net-like fabric is primarily intended for good filtration of the flowing liquid metal. It is also noted that such a filter fabric facilitates breaking away of a feeder remainder after completion of the casting process. For positioning of the filter fabric in the connecting channel, however, no statement is made in the aforementioned document; In any case, the filter fabric is arranged at a distance from the casting model or the mold cavity. It can also be assumed that the filter fabric extending over the entire surface of the connecting channel prevents the metal flow in the connecting channel.

Weiterhin ist aus der FR 2 647 381 A1 ein Eingusssystem mit einem Eingusskanal bekannt, in dessen Querschnitt wiederum mit deutlichem Abstand zum Formhohlraum ein Filtergewebe eingeschaltet ist. Das Filtergewebe ist in einem aus Sand gefertigten Rahmen gehalten, der bei der Herstellung der Gießform mit in den Formsand eingeformt wird.Furthermore, from the FR 2 647 381 A1 a Eingusssystem with a sprue known in the cross section, in turn, at a considerable distance from the mold cavity, a filter fabric is turned on. The filter fabric is held in a frame made of sand, which is formed in the molding sand during the production of the mold.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Seitenspeisersystem mit den eingangs genannten Merkmalen, einen Rahmen zur Verwendung mit einem solchen Seitenspeisersystem sowie ein Verfahren zur Herstellung von ein derartiges Seitenspeisersystem enthaltenden Gießformen anzugeben, bei welchem jeweils das netzartige Gewebe einen geringen Durchflusswiderstand für das flüssige Metall bietet und trotzdem das Auftreten von nach dem Abguss an dem Gussstück vorhandenen und durch Putzarbeiten zu beseitigenden Metallresten einschränkt.The invention is therefore an object of the invention to provide a side feed system having the features mentioned, a frame for use with such a side feed system and a method for producing molds containing such a side feed system, in which each of the net-like fabric provides a low flow resistance for the liquid metal and yet limits the occurrence of existing after casting on the casting and to be removed by cleaning metal residues.

Die Erfindung sieht hierzu zunächst ein Seitenspeisersystem vor, bei welchem das netzartige Gewebe ein Durchgangsloch aufweist und in einem zwischen dem gießmodellseitigen Ende des Verbindungskanals und dem Gießmodell beziehungsweise dem Formhohlraum festgelegten, aus einem hitzebeständigen Material bestehenden Rahmen aufgespannt ist.For this purpose, the invention initially provides a side feed system in which the net-like fabric has a through-hole and is clamped in a frame made of a heat-resistant material between the casting-model-side end of the connection channel and the casting model or the mold cavity.

Mit der Erfindung ist der Vorteil verbunden, dass aufgrund des in dem Rahmen aufgespannten netzartigen Gewebes dieser Rahmen als gesondertes Bauteil bei der Herstellung der Gießform prozesssicher gehandhabt und gemeinsam mit der Ausbildung des Seitenspeisersystems in unmittelbarer Nähe des Gießmodells beziehungsweise des Formhohlraums positioniert werden kann. Soweit eine ausreichende Spannung des netzartigen Gewebes im Fließweg deswegen sichergestellt sein muss, damit das Gewebe bei dem Durchströmen mit dem flüssigen Metall während des Abgusses nicht in den Formhohlraum und damit in die Gussteilstruktur hineingezogen wird, ermöglicht die Anordnung des Rahmens eine Spannung und Halterung des netzartigen Gewebes in den Rahmen unabhängig von der Festigkeit des Formsandes an der Positionierungsstelle des netzartigen Gewebes. Der Einsatz eines aus einem hitzebeständigen Material bestehenden Rahmens zur Halterung des gespannten netzartigen Gewebes bietet zudem den Vorteil, dass der Rahmen nicht durch das die Gießform durchströmende heiße Metall aufgeschmolzen wird und damit keine für den Gießprozess schädlichen Verbrennungsgase entstehen.The invention has the advantage that due to the net-like fabric spanned in the frame, these frames can be reliably handled as a separate component in the production of the casting mold and can be positioned together with the formation of the side feed system in the immediate vicinity of the casting mold or mold cavity. Insofar as sufficient tension of the net-like tissue in the flow path must be ensured so that the tissue is not drawn into the mold cavity during casting and thus into the casting structure, the arrangement of the frame allows tension and retention of the net-like Fabric in the frame regardless of the strength of the molding sand at the positioning of the net-like fabric. The use of a frame made of a heat-resistant material for holding the tensioned net-like fabric also has the advantage that the frame is not melted by the hot metal flowing through the mold and thus do not create harmful for the casting process combustion gases.

Ein zur Verwendung mit dem erfindungsgemäßen Seitenspeisersystem geeigneter Rahmen weist nach einem Ausführungsbeispiel der Erfindung eine sich konisch verengende Kontur auf, wobei das netzartige Gewebe an der sich verengenden und beim Einformen in die Gießform dem Gießmodell beziehungsweise dem Formhohlraum zugewandten Seite des Rahmens festgelegt ist. Auf diese Weise wird erreicht, dass das netzartige Gewebe bei der Positionierung des Rahmens ganz nahe an der Gießmodellkontur zu liegen kommt, während der sich an der sich an der erweiternden Seite des Rahmens befindliche Rahmenteil für die Festlegung des Rahmens in der Gießform herangezogen werden kann.A frame suitable for use with the side feed system according to the invention has one according to an embodiment of the invention conically narrowing contour, wherein the net-like tissue is fixed to the narrowing and during molding in the mold to the casting model or the mold cavity side facing the frame. In this way, it is achieved that the net-like tissue comes to lie in the positioning of the frame very close to the Gießmodellkontur, while can be used on the located on the widening side of the frame frame part for the determination of the frame in the mold.

Nach einem Ausführungsbeispiel der Erfindung ist zweckmäßig, wenn der Rahmen aus zwei gegeneinander beweglichen Teilrahmen besteht, die nach Aufbringen der erforderlichen Spannung des netzartigen Gewebes gegeneinander festlegbar sind.According to one embodiment of the invention is expedient if the frame consists of two mutually movable subframe, which are fixed against each other after application of the required tension of the net-like fabric.

Hinsichtlich des in dem netzartigen Gewebe ausgebildeten Durchgangslochs kann vorgesehen sein, dass dieses Durchgangsloch eine geringere Abmessung als der Querschnitt des in dem Speiserunterteil befindlichen Verbindungskanals aufweist. Im Einzelnen kann dabei nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, dass das Durchgangsloch eine Fläche von 10 bis 50 Prozent der von dem Rahmen umschlossenen Fläche des Verbindungskanals aufweist, wobei die Netzweite, das heißt, die Weite der Netzöffnungen, 1 bis 20 mm bei einer Breite der die Netzstruktur bildenden Fäden von 1 bis 15 mm beträgt.With respect to the through-hole formed in the net-like fabric, it may be provided that this through-hole has a smaller dimension than the cross-section of the connecting channel located in the feeder lower part. Specifically, it may be provided according to an embodiment of the invention that the through hole has an area of 10 to 50 percent of the area enclosed by the frame surface of the connecting channel, wherein the mesh width, that is, the width of the mesh openings, 1 to 20 mm at a Width of the net structure forming threads from 1 to 15 mm.

Nach einem Ausführungsbeispiel der Erfindung kann vorgesehen sein, dass das Durchgangsloch mittig in dem Rahmen angeordnet und aufgrund der Positionierung des Rahmens mittig in dem Verbindungskanal der Speiserkalotte gelegen ist.According to one embodiment of the invention can be provided that the through hole is arranged centrally in the frame and located centrally due to the positioning of the frame in the connecting channel of the feeder dome.

Nach Ausführungsbeispielen der Erfindung kann der Rahmen aus Metall, Keramik oder einem Feuerfestmaterial als jeweils hitzebeständigem Material bestehen.According to embodiments of the invention, the frame may be made of metal, ceramic or a refractory material as each heat-resistant material.

Soweit sich die Erfindung auch auf ein Verfahren zur Herstellung von ein Seitenspeisersystem enthaltenen Gießformen richtet, kann entsprechend der bekannten Verfahrenstechnik vorgesehen sein, dass der Rahmen gemeinsam mit dem Seitenspeisersystem vor dem Erstellen der Gießform durch Abformen des Gießmodells an einer das Gießmodell tragenden Modellplatte an dem Gießmodell positioniert und beim Erstellen der Gießform gemeinsam mit dem Gießmodell und dem Seitenspeisersystem abgeformt wird. Alternativ kann vorgesehen sein, dass beim Erstellen der Gießform durch gemeinsames Abformen des Gießmodells mit dem daran positionierten Seitenspeisersystem eine Aussparung zum nachträglichen Einsetzen des Rahmens ausgeformt wird.As far as the invention is directed to a method for producing a side feed system contained casting molds may be provided according to the known process technology that the frame together with the side feed system before creating the mold by molding the casting model on a casting model supporting the model plate on the casting model is positioned and molded together with the casting model and the side feed system when creating the mold. Alternatively, it can be provided that, when the casting mold is produced by jointly molding the casting model with the side feeder system positioned thereon, a recess for the subsequent insertion of the frame is formed.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung wiedergegeben, welches nachstehend beschrieben ist. Es zeigen

Fig. 1:
in einer schematischen, auseinandergezogenen Darstellung die Anordnung eines Gießmodells, eines Rahmens mit netzartigem Gewebe sowie eines Seitenspeisersystems,
Fig. 2:
einen ersten Teilrahmen des Rahmens in einer Einzeldarstellung,
Fig. 3:
einen zweiten Teilrahmen des Rahmens in einer Einzeldarstellung,
Fig. 4:
den aus erstem und zweitem Teilrahmen zusammengesetzten Rahmen gemäß Fig. 1.
In the drawing, an embodiment of the invention is reproduced, which is described below. Show it
Fig. 1:
in a schematic, exploded view of the arrangement of a casting model, a frame with reticulated fabric and a side feed system,
Fig. 2:
a first subframe of the frame in a single representation,
3:
a second subframe of the frame in a single representation,
4:
the framework composed of the first and second subframes Fig. 1 ,

Aus Fig. 1 ist zunächst lediglich die schematische Anordnung der in einem gegebenenfalls geteilten Formkasten für eine herzustellende Gießform einzubringenden Teile wie Gießmodell 10, Seitenspeisersystem 11 und den ein nicht dargestelltes netzartiges Gewebe haltenden Rahmen 16 zueinander ersichtlich. Die vorgenannte Anordnung ist auf einer Modellplatte 19 platziert. Im Rahmen der Herstellung einer Gießform werden die genannten Teile in ihrer technisch notwendigen Zuordnung zueinander entweder in dem Formkasten angeordnet und durch Befüllen des Formkastens beziehungsweise der Formkastenhälften mit Formsand ein- beziehungsweise abgeformt, oder es wird lediglich das Gießmodell in dem Formkasten eingeformt, wobei durch entsprechend zusätzliche Formteile Aussparungen in dem Formsand hergestellt werden, in welchen anschließend der Rahmen und das Seitenspeisersystem angeordnet werden.Out Fig. 1 Initially, only the schematic arrangement of the parts to be introduced in a possibly divided mold box for a mold to be produced parts such as casting model 10, side feed system 11 and the not shown net-like fabric holding frame 16 to each other visible. The aforementioned arrangement is placed on a model plate 19. As part of the production of a mold, the parts mentioned are arranged in their technically necessary assignment to each other either in the mold box and by filling the mold box or the mold box halves with molding sand or molded, or it is only the casting model molded in the molding box, whereby by accordingly additional moldings recesses are made in the molding sand, in which then the frame and the side feed system are arranged.

Wie sich aus Fig. 1 ferner ergibt, besteht das Seitenspeisersystem 11 aus einem einen inneren Speiserhohlraum 13 aufweisenden Speiser 12 sowie aus einer einen Verbindungskanal 15 aufweisenden Speiserkalotte 14, welche mit ihrem Verbindungskanal 15 so angeordnet wird, dass eine Verbindung zwischen dem nach Entfernen des Gießmodells 10 aus dem nicht weiter dargestellten Formkasten bestehenden und beim Abguss mit dem heißen Metall zu füllenden Formhohlraum und dem inneren Speiserhohlraum 13 des Speisers 12 gegeben ist. In den Fließweg zwischen dem Formhohlraum und dem Verbindungskanal 15 der Speiserkalotte 14 ist der Rahmen 16 mit dem von ihm einer aufgespannten Weise gehaltenen netzartigen Gewebe angeordnet, welches ein Durchgangsloch als Durchlass für das den Verbindungskanal 15 der Speiserkalotte 14 durchströmende heiße Metall aufweist. Der Rahmen 16 wird dabei möglichst nahe an dem Gießmodell 10 bzw. dem dadurch erzeugten Formhohlraum angeordnet, was durch die sich konisch verengende Kontur des Rahmens unterstützt wird, soweit die sich verengende Seite des Rahmens 16 dem Gießmodell 10 bzw. dem Formhohlraum zugewandt ist und das netzartige Gewebe an der sich verengenden Seite des Rahmens 16 festgelegt ist.As it turned out Fig. 1 Further, the side feed system 11 consists of a feeder 12 having an inner feeder cavity 13 and a feeder cup 14 having a connection channel 15, which is arranged with its connection channel 15 so that a connection between the after removal of the casting model 10 from the not shown Form box existing and to be filled during casting with the hot metal mold cavity and the inner feeder cavity 13 of the feeder 12 is given. In the flow path between the mold cavity and the connecting channel 15 of the feeder dome 14 of the frame 16 is arranged with him held a clamped manner net-like fabric having a through hole as a passage for the connecting channel 15 of the feeder dome 14 flowing hot metal. The frame 16 is thereby arranged as close as possible to the casting model 10 or the mold cavity produced thereby, which is supported by the conically narrowing contour of the frame, as far as the narrowing side of the frame 16 faces the casting mold 10 and the mold cavity and the net-like fabric is fixed to the narrowing side of the frame 16.

Soweit der Rahmen aus einem hitzebeständigen Material bestehen soll, kann der Rahmen aus Metall, Keramik oder einem Feuerfestmaterial bestehen.As far as the frame is to be made of a heat-resistant material, the frame may be made of metal, ceramic or a refractory material.

In den Fig. 2 bis 4 ist der aus zwei Teilrahmen 24, 26 bestehende Rahmen 16 in seiner Ausgestaltung dargestellt, allerdings ohne das von dem Rahmen 16 zu halternde netzartige Gewebe. In Fig. 2 ist zunächst der erste Teilrahmen 24 dargestellt, der den äußeren Teilrahmen des zweiteiligen Rahmens 16 bildet, wobei aus Fig. 3 der zweite Teilrahmen 26 ersichtlich ist, der insoweit baugleich mit dem ersten Teilrahmen 24 ist, jedoch in seinen Abmessungen derart ausgelegt ist, dass der zweite Teilrahmen 26 in den ersten Teilrahmen 24 einlegbar beziehungsweise einschiebbar ist, wobei das (nicht dargestellte) netzartige Gewebe zwischen den beiden Teilrahmen 24 und 26 eingelegt und entsprechend gespannt wird.In the Fig. 2 to 4 is the frame 16 consisting of two sub-frames 24, 26 shown in its design, but without the net-like tissue to be held by the frame 16. In Fig. 2 First, the first sub-frame 24 is shown, which forms the outer sub-frame of the two-part frame 16, wherein from Fig. 3 the second sub-frame 26 can be seen, which is so far identical to the first sub-frame 24, but in its dimensions designed such that the second sub-frame 26 in the first sub-frame 24 can be inserted or inserted, wherein the (not shown) reticulate Tissue between the two sub-frames 24 and 26 is inserted and tensioned accordingly.

Jeder Teilrahmen 24, 26 besteht demzufolge aus an drei Seiten umlaufenden Rahmenschenkeln 20 und bildet jeweils eine U-förmige Gestalt, wobei das offene Ende der U-förmig angeordneten Rahmenschenkel 20 durch einen flachen Verbindungsschenkel 27 geschlossen ist, so dass jeder Teilrahmen 24, 26 in sich stabil ausgelegt ist. Die beiden Teilrahmen weisen jeweils eine konische Gestalt auf, indem die Rahmenschenkel 20 jeweils derart schräg gestellt sind, dass der untere Rand 21 der Rahmenschenkel 20 eine kleinere Fläche umschließt als der obere Rand 22 der Rahmenschenkel 20. Die von dem unteren Rand der Rahmenschenkel 21 umschlossene Fläche wird dann durch das zwischen die Teilrahmen 24, 26 eingelegte netzartige Gewebe geschlossen, was bedeutet, dass das netzartige Gewebe bei dem fertigen Rahmen 16 auf der sich konisch verengenden Seite des Rahmens 16 angeordnet ist. Soweit der erste Teilrahmen 24 bei der Auslegung des Rahmens 16 den äußeren Randbereich des Rahmens 16 ausbildet, ist an dem unteren Rand 21 des ersten Teilrahmens 24 noch ein sich über die U-förmig angeordneten Rahmenschenkel 20 erstreckender, abstehender Aufstandsrand 25 angeordnet, der der Fixierung des Rahmens 16 dient. An den beiden einander gegenüberliegenden Rahmenschenkeln 20 der beiden Teilrahmen 24 und 26 sind zudem bei dem dargestellten Ausführungsbeispiel jeweils drei Fixieröffnungen 28 ausgebildet, die eine Fixierung des Rahmens 16 an der Modellstruktur oder in Formsand ermöglichen. So kann beispielsweise der Formsand die Fixieröffnungen durchdringen und so für einen Formschluss zwischen dem Rahmen 16 und dem Formsand sorgen. Es ist auch denkbar, durch die Fixieröffnungen 28 Fixiernägel zu schlagen, um den Rahmen 16 im Formsand oder auch an der Modellstruktur zu verankern.Each sub-frame 24, 26 consists of three circumferential sides frame legs 20 and each forms a U-shaped configuration, wherein the open end of the U-shaped frame legs 20 is closed by a flat connecting leg 27, so that each sub-frame 24, 26 in is designed to be stable. The two subframes each have a conical shape by the frame legs 20 are each placed obliquely so that the lower edge 21 of the frame legs 20 surrounds a smaller area than the upper edge 22 of the frame legs 20. The enclosed by the lower edge of the frame legs 21 The surface is then closed by the net-like fabric inserted between the sub-frames 24, 26, which means that the net-like fabric is arranged on the conically narrowing side of the frame 16 in the finished frame 16. As far as the first sub-frame 24 in the design of the frame 16 forms the outer edge region of the frame 16, at the lower edge 21 of the first sub-frame 24 is still arranged over the U-shaped frame legs 20 extending, protruding Aufstandsrand 25, the fixing the frame 16 is used. In the illustrated embodiment, in each case three fixing openings 28 are formed on the two opposite frame legs 20 of the two sub-frames 24 and 26, which allow a fixation of the frame 16 on the model structure or in molding sand. Thus, for example, the molding sand penetrate the fixing holes and thus ensure a positive connection between the frame 16 and the molding sand. It is also conceivable to beat fixing nails 28 through the fixing openings in order to anchor the frame 16 in the foundry sand or else on the model structure.

Die in der vorstehenden Beschreibung, den Patentansprüchen, der Zusammenfassung und der Zeichnung offenbarten Merkmale des Gegenstandes dieser Unterlagen können einzeln als auch in beliebigen Kombinationen untereinander für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features disclosed in the foregoing description, the claims, the abstract and the drawings of the subject matter of these documents may be essential individually as well as in any combination with each other for the realization of the invention in its various embodiments.

Claims (10)

  1. Lateral feeder system (11) for use in casting molds, in which casting molds a casting model (10) forming a model cavity is formed, wherein the lateral feeder system (11) has a feeder (12) forming an inner feeder cavity (13) and a feeder cage (14) having a connecting channel (15) to the casting model (10) or the mold cavity, wherein a primary axis of the connecting channel (15) runs at an angle to a primary axis of the feeder (12), and wherein a net-like web made of fire proof material is arranged in the connecting channel (15), characterized in that the net-like web has a through-hole and is mounted in a frame (16) made from a heat-resistant material, the frame (16) being fixed between an end of the connecting channel (15) on a casting model-side and the casting model (10) or the mold cavity.
  2. Lateral feeder system (11) according to claim 1, wherein the frame (16) has a conical, tapered contour and wherein the netlike web is fixed to the tapered side of the frame (16), wherein the tapered side faces the casting model (10) or the mold cavity.
  3. Lateral feeder system (11) according to claim 2, wherein the frame (16) comprises two partial frames (24, 26) oppositely moveable relative to one another, wherein the two partial frames (24, 26) are attachable to one another after application of the required tensioning of the netlike web.
  4. Lateral feeder system (11) according to claim 2 or 3, wherein the through-hold formed in the netlike web has smaller dimensions than a cross section of the connecting channel (15) formed in a feeder lower section (14).
  5. Lateral feeder system (11) according to one of claims 2 to 4, wherein the through-hole is disposed centrally in the frame (16) and based on the positioning of the frame (16), is positioned centrally in the connecting channel (15) of the feeder cage (14).
  6. Lateral feeder system (11) according to one of claims 2 to 5, wherein the frame (16) is made of a metallic material.
  7. Lateral feeder system (11) according to one of claims 2 to 5, wherein the frame (16) is made of a ceramic material.
  8. Lateral feeder system (11) according to one of claims 2 to 5, wherein the frame (16) is made of a fireproof material.
  9. A method for making a casting model comprising a lateral feeder system (11) according to claim 1, in which the frame (16) is casted with the lateral feeder system (11) before forming the casting mold by molding of the casting model (10) on a model plate (19) supporting the casting model on which the casting model (10) is positioned and upon making of the casting mold commonly with the casting model (10) and the lateral feeder system (11).
  10. A method for making a casting model comprising a lateral feeder system (11) according to claim 1, in which upon making a casting mold by common casting of the casting model (10) with the lateral feeder system (11) positioned thereon, a recess is formed for subsequent insertion of the frame (16).
EP16171209.6A 2015-06-01 2016-05-25 Method and device for producing casting moulds with at least one side feeder system Active EP3100801B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015108656.5A DE102015108656B4 (en) 2015-06-01 2015-06-01 Side feed system, reticulated fabric support frame, and method of making a mold

Publications (2)

Publication Number Publication Date
EP3100801A1 EP3100801A1 (en) 2016-12-07
EP3100801B1 true EP3100801B1 (en) 2019-03-06

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ID=56080324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16171209.6A Active EP3100801B1 (en) 2015-06-01 2016-05-25 Method and device for producing casting moulds with at least one side feeder system

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Country Link
US (1) US20160346832A1 (en)
EP (1) EP3100801B1 (en)
DE (1) DE102015108656B4 (en)
TR (1) TR201906639T4 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556077A (en) * 1978-10-21 1980-04-24 Bridgestone Tire Co Ltd Ceramic porous body
DE3244079A1 (en) * 1982-11-29 1984-06-14 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Screen for holding back oxide skins in the casting of aluminium and its alloys
DE8418911U1 (en) 1984-06-21 1987-11-19 Chemex GmbH, 5802 Wetter Side feeders for castings
DE3423220A1 (en) * 1984-06-21 1986-01-02 Chemex GmbH, 5802 Wetter Side feeder for castings
DE8422497U1 (en) * 1984-07-28 1985-01-10 Stettner & Co, 8560 Lauf CERAMIC CAST FILTER
DE8702296U1 (en) * 1987-02-14 1987-04-09 L. Bregenzer Gießereibedarf GmbH & Co, 7000 Stuttgart Side feeders for use in casting moulds
FR2647381B1 (en) * 1989-04-25 1991-09-13 Fonderie Aluminium Ste Nle FILTER FOR THE FILTERING OF ALUMINUM ALLOYS DURING CASTING MOLDING OPERATIONS, AS WELL AS THE PROCESS USING THIS FILTER
JPH03264142A (en) * 1990-03-14 1991-11-25 Nippon Muki Co Ltd Net body for casting
DE20318773U1 (en) * 2003-12-01 2005-04-07 Drache Umwelttechnik Gmbh Foamed ceramic filter for molten metal, particularly iron and steel, with increased flow area and reduced tendency for cracking, is of elongated configuration and has rounded corners or edges
DE202005006259U1 (en) * 2005-04-19 2005-08-18 Eisenschmid, Jakob Standalone tiled stove heats convection air and has an air filter with a metal frame with two honeycomb sub-frames
US8794298B2 (en) * 2009-12-30 2014-08-05 Rolls-Royce Corporation Systems and methods for filtering molten metal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3100801A1 (en) 2016-12-07
DE102015108656A1 (en) 2016-12-01
US20160346832A1 (en) 2016-12-01
DE102015108656B4 (en) 2017-10-19
TR201906639T4 (en) 2019-05-21

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