EP0802839A1 - Process for introducing cores into a casting mould - Google Patents
Process for introducing cores into a casting mouldInfo
- Publication number
- EP0802839A1 EP0802839A1 EP96924883A EP96924883A EP0802839A1 EP 0802839 A1 EP0802839 A1 EP 0802839A1 EP 96924883 A EP96924883 A EP 96924883A EP 96924883 A EP96924883 A EP 96924883A EP 0802839 A1 EP0802839 A1 EP 0802839A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- cores
- casting mold
- core group
- clamping
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
Definitions
- the invention relates to a method for introducing cores into a casting mold.
- the invention is based on the object of creating a method which simplifies the introduction of the Causes cores in such a mold and avoids costly post-processing.
- This object is achieved according to the invention in that the individual cores are introduced into a setting jig, that the adjoining cores forming a core group in the setting jig are connected to one another via tensioning and holding means, that the interconnected core group is combined in one Sizing bath is dipped and dried and that the dried core group is inserted into the casting mold and then the bracing is released.
- This method takes advantage of the fact that at least some cores forming a core group are each provided with core brands which can be designed such that on the one hand they touch one another and on the other hand also protrude beyond the actual shaping core surface and form corresponding contact surfaces , so that here the cores can be clamped against each other and fixed against each other by means of a corresponding, for example frame-shaped, clamping means and can thus be handled as a unit. It is expedient if the contacting contact surfaces of the cores are provided with so-called green glue before insertion into the setting gauge in order to improve the cohesion even further.
- this core group is immersed in a size bath in accordance with the method according to the invention and the size is dried after dripping, the relatively thin gaps in the area of the contact surfaces of adjoining individual cores, which cannot be avoided, are filled in by the size, so that this results in the formation of burrs is avoided.
- the core group is then transported further with the aid of the clamping and holding means and inserted into the prepared casting mold, for example a lower box, so that after the tensioning has been released, the upper box is put on and the casting process can be carried out in the usual way.
- the method according to the invention makes it possible, depending on the design of the casting to be produced, to connect a single core group composed of a plurality of individual cores or also one of a plurality of core groups forming a core assembly for a casting mold as a core set via the clamping and holding means and in the individual treatment steps until it is inserted into the mold.
- This enables the handling of very complex core groups in this way.
- the previously required additional inlay work which always led to the formation of burrs in the transition region between the individual core and the associated basic core, is avoided in this way, since the approach between the core approach and the associated basic core avoids burr formation by covering the entire
- the individual cores 1, 2, 3 and 4 are then placed in a setting gauge 5 in method step I, by means of which the mutual assignment of the cores 1, 2, 3 and 4 is fixed.
- the cores 1, 2, 3 and 4 are on their outside facing side in the usual way provided with core marks 6, which are now designed so that they have an outwardly facing contact surface, which in turn is expediently designed such that adjacent contact surfaces 7 are aligned with each other.
- the individual cores 1, 2, 3 and 4 forming a core group and inserted into the setting gauge 5 are now firmly clamped together with a clamping and holding means 8, for example, in the form of a frame, the mutually directed projections 9 on the individual cores 1, 2, 3 and 4, which, depending on the design of the casting to be produced, either serve to produce openings in corresponding wall parts of the casting or, on the other hand, are designed as core marks and are firmly pressed together.
- the cores can be provided with a so-called green adhesive on their mutually facing contact surfaces 9.1, so that in this area the fixation is further increased by adhesive bonding.
- the core group combined to form a unit 10 can now be transported in a method step III via the manipulator 8.1, which detects the clamping and holding means 8 on the gripping cam 8.2, and immersed in a sizing bath 11.
- the tensioning and holding means 8 can also be turned by the manipulator 8.1, so that excess size can drip off after immersion. Since the, for example, frame-shaped clamping and holding means 8 holds the cores 1, 2, 3 and 4 combined as a core group only in the area of the core brands later during casting, the surfaces of the core group forming the corresponding areas of the casting are completely covered with size, the gaps between the individual adjacent cores 1, 2, 3 and 4 being closed by the size and thus avoiding the formation of casting burrs.
- the unit 10 In the subsequent process step IV, the unit 10 must be fed to a drying device 16 in which the size coating is dried, for example by a combined microwave and air drying process.
- the manipulator 8.1 deposits it in a movable oven support 12.
- the furnace support 12 has clamping cheeks 13 on two opposite sides, which are inclined toward one another with their inwardly facing clamping surfaces 14 opening upwards.
- clamping cams 15 Arranged on both sides of the gripping cam 8.2 on the clamping and holding means 8 are clamping cams 15 each projecting therefrom, which are provided with a counter surface corresponding to the clamping surface 14, so that when the unit 10 is placed in the furnace support
- the manipulator 8.1 can then be released and the entire arrangement can be moved into the drying device 16.
- the core group combined in the unit 10 is lifted out of the oven support 12 by the manipulator 8.1 and is now inserted in the next process step V into the lower case 17 or a set-up gauge for a prepared casting mold. Only now is the frame-shaped clamping and holding means 8 released and removed from the core group. Subsequently, in the following process step VI, the upper box 18 is placed on the lower box 17 and firmly connected to it, so that the casting process can then take place. From the above description of the process sequence for a schematic exemplary embodiment with a core group composed of four individual cores, it is evident that even very complex castings can be produced using the method according to the invention.
- Another advantage of the method according to the invention is that the cycle times when casting the finished molds can be increased, since the time required for inserting cores is considerably reduced. Another advantage of the method according to the invention is that there is greater flexibility with regard to customer requirements or further developments. Here it is only necessary to ensure when designing the cores that neighboring cores, even if these have no approaches between them for the formation of breakthroughs and which must then have core brands anyway, are designed in such a way that necessary core marks touch each other directly, so that a bracing is possible with a corresponding design of the core marks on the outside via a preferably frame-shaped clamping and holding means.
- the method according to the invention also allows two or more core groups belonging to one another to be combined into a complete core set in a common clamping and holding means, without the individual core groups themselves having to be brought into contact by means of a corresponding arrangement of approaches.
- the method according to the invention is therefore also possible if individual core groups do not have a common clamping plane with regard to their core brands. It is then possible here to clamp the individual core groups together in a main frame with special clamping and holding means and to handle them for the subsequent process steps until they are inserted into the casting mold.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Casting Devices For Molds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PCT No. PCT/EP96/02943 Sec. 371 Date Jun. 25, 1997 Sec. 102(e) Date Jun. 25, 1997 PCT Filed Jul. 4, 1996 PCT Pub. No. WO97/16271 PCT Pub. Date May 9, 1997A process for inserting cores into a casting mold includes inserting a plurality of individual cores into a template; forming a core group by joining together the plurality of individual cores within the template using a bracing and securing device which is detachable; dipping the core group into a founder's black bath to provide a coated core group; drying the coated core group; inserting the core group after drying into the casting mold; and removing the bracing and securing device. The process advantageously additionally includes providing a plurality of core groups that form a core assembly for a casting mold; forming a core set by joining together the plurality of core groups using a bracing and securing device; dipping the core set into a founder's black bath to provide a coated core set; drying the coated core set; inserting the core set after drying into the casting mold; and removing the bracing and securing device. The plurality of cores have respective contact surfaces that touch each other, and the process advantageously includes providing an adhesive on at least some of the contact surfaces prior to inserting the plurality of cores into the template.
Description
VERFAHREN ZUM EINBRINGEN VON KERNEN IN EINE GIESSFORM METHOD FOR PUTTING CORE INTO A CASTING MOLD
Beschreibungdescription
Die Erfindung betrifft ein Verfahren zum Einbringen von Kernen in eine Gießform.The invention relates to a method for introducing cores into a casting mold.
In der Gießereitechnik, insbesondere in der Graugußtechnik, war es bisher üblich, bei der aus wenigstens zwei Form¬ kästen gebildete Gießform zur Herstellung von dünnwandigen Gußstücken, beispielsweise Motorblöcken, in einen der Form¬ kästen entsprechende Kerne von Hand einzulegen. Insbesondere bei der Herstellung von Motorblöcken aus Grauguß werden in zunehmendem Maße hinsichtlich der Komplexität des Motor¬ blocks, Gewichtseinsparungen, Maßgenauigkeiten und Ober¬ flächenqualität höhere Anforderungen gestellt. Dies macht es erforderlich, im Kernfertigungsbereich möglichst fili¬ grane und auch in ihrer Geometrie sehr komplexe Kerne her¬ zustellen, die die nachfolgende mechanische Bearbeitung der Motorblöcke auf ein Minimum reduzieren. Hier hat es sich herausgestellt, daß es zweckmäßig ist, den jeweils herzustellenden Motorblock so zu konzipieren, daß bisher in einer nachträglichen mechanischen Bearbeitung einge¬ brachte Bohrungen, Durchbrüche oder dergl. von vorneherein mit eingegossen werden. Dies macht es erforderlich, daß einander benachbarte Kerne entsprechende Ansätze aufweisen, die diese Durchbrüche in der Gießform "freihalten". Hierbei hat es sich jedoch herausgestellt, daß infolge eines nicht zu verhindernden Verschleisses und infolge nicht zu verhin¬ dernder Maßabweichungen gerade in diesem Berührungsbereich benachbarter Kerne an den herzustellenden Durchbrüchen Grate entstehen, die nach dem Ausformen des Gußstückes nachbearbeitet werden müssen.In foundry technology, in particular in gray cast iron technology, it was previously customary to manually insert cores corresponding to the mold boxes in the mold formed from at least two mold boxes for the production of thin-walled castings, for example engine blocks. In particular in the manufacture of engine blocks from gray cast iron, higher demands are increasingly being made with regard to the complexity of the engine block, weight savings, dimensional accuracy and surface quality. This makes it necessary to produce cores that are as filigree as possible and also very complex in their geometry in the core production area, which reduce the subsequent mechanical processing of the engine blocks to a minimum. Here it has been found that it is expedient to design the engine block to be manufactured in such a way that previously drilled holes, openings or the like are cast in from the outset in a subsequent mechanical processing. This makes it necessary for the cores which are adjacent to one another to have corresponding projections which “keep” these openings in the casting mold. It has been found, however, that as a result of wear that cannot be prevented and due to dimensional deviations that cannot be prevented, burrs occur on the openings to be produced in this area of contact between adjacent cores, which burrs have to be reworked after the casting has been formed.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zu schaffen, das eine Vereinfachung beim Einbringen der
Kerne in eine derartige Gießform bewirkt und kostenaufwen¬ dige Nachbearbeitungen vermeidet.The invention is based on the object of creating a method which simplifies the introduction of the Causes cores in such a mold and avoids costly post-processing.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die einzelnen Kerne in eine Setzlehre eingebracht wer¬ den, daß die aneinandergrenzenden, eine Kerngruppe bilden¬ den Kerne in der Setzlehre über Spann- und Haltemittel miteinander verbunden werden, daß die miteinander verbundene Kerngruppe in ein Schlichtebad getaucht und getrocknet wird und daß die getrocknete Kerngruppe in die Gießform eingesetzt und dann die Verspannung gelöst wird. Bei diesem Verfahren wird mit Vorteil ausgenutzt, daß zumindest einige, eine Kerngruppe bildende Kerne jeweils mit Kernmarken ver¬ sehen sind, die so gestaltet werden können, daß sie sich einerseits gegenseitig berühren und andererseits auch die eigentliche formende Kernoberfläche überragen und entspre¬ chende Anlageflächen bilden, so daß hier die Kerne durch ein entsprechendes, beispielsweise rahmenfδrmiges Spann¬ mittel über ihre Anlageflächen gegeneinander verspannt und gegeneinander fixiert werden können und somit als eine Einheit gehandhabt werden können. Zweckmäßig ist es, wenn die einander berührenden Anlageflächen der Kerne vor dem Einlegen in die Setzlehre mit sogenanntem Grünkleber ver¬ sehen werden, um den Zusammenhalt noch zu verbessern. Wird diese Kerngruppe entsprechend dem erfindungsgemäßen Verfah¬ ren in ein Schlichtebad getaucht und die Schlichte nach dem Abtropfen getrocknet, dann sind die nicht zu vermeiden¬ den relativ dünnen Spalte im Bereich der Berührungsflächen aneinandergrenzender Einzelkerne von der Schlichte ausge¬ füllt, so daß hierdurch die Bildung von Graten vermieden wird. Die Kerngruppe wird dann mit Hilfe des Spann- und Haltemittels weiter transportiert und in die vorbereitete Gießform, beispielsweise einen Unterkasten, eingesetzt, so daß nach dem Lösen der Verspannung der Oberkasten aufge¬ setzt und die Gießvorgang in üblicher Weise durchgeführt werden kann.
Das erfindungsgemäße Verfahren erlaubt es, je nach Gestal¬ tung des herzustellenden Gußstückes eine einzelne, aus mehreren Einzelkernen zusammengesetzte Kerngruppe oder auch eine aus mehreren, eine Kernbestückung für eine Gie߬ form bildende Kerngruppe als Kernsatz über das Spann- und Haltemittel miteinander zu verbinden und in verspanntem Zustand die einzelnen Behandlungsschritte bis zum Einlegen in die Gießform durchzuführen. Damit ist die Möglichkeit gegeben, auch sehr komplexe Kerngruppen in dieser Weise zu handhaben. Es ist auch möglich, für einzelne Kernteile vorzusehende Ansätze, die bisher noch einzeln in eine Gie߬ form eingelegt wurden, bei der Herstellung der Kerne mit dem zugehörenden Grundkern zu verbinden, beispielsweise über eine Klebeverbindung anzukleben, so daß dieser an sich in seinem Aufbau komplizierte, aus zwei oder mehreren Teilen zusammengesetzter Einzelkern gleichwohl mit in die Kerngruppe einbezogen wird, mit dem Schlichteüberzug ver¬ sehen werden kann und anschließend dann in die Gießform eingelegt werden kann. Die bisher erforderliche zusätzli¬ che Einlegearbeit, die immer zur Bildung von Graten im Ubergangsbereich zwischen dem Einzelkern und dem zugehörigen Grundkern führte, ist hierdurch vermieden, da durch den Schlichteüberzug der gesamten Kerngruppe der Ansatz zwischen dem Kernansatz und dem zugehörigen Grundkern eine Gratbil¬ dung vermeidet.This object is achieved according to the invention in that the individual cores are introduced into a setting jig, that the adjoining cores forming a core group in the setting jig are connected to one another via tensioning and holding means, that the interconnected core group is combined in one Sizing bath is dipped and dried and that the dried core group is inserted into the casting mold and then the bracing is released. This method takes advantage of the fact that at least some cores forming a core group are each provided with core brands which can be designed such that on the one hand they touch one another and on the other hand also protrude beyond the actual shaping core surface and form corresponding contact surfaces , so that here the cores can be clamped against each other and fixed against each other by means of a corresponding, for example frame-shaped, clamping means and can thus be handled as a unit. It is expedient if the contacting contact surfaces of the cores are provided with so-called green glue before insertion into the setting gauge in order to improve the cohesion even further. If this core group is immersed in a size bath in accordance with the method according to the invention and the size is dried after dripping, the relatively thin gaps in the area of the contact surfaces of adjoining individual cores, which cannot be avoided, are filled in by the size, so that this results in the formation of burrs is avoided. The core group is then transported further with the aid of the clamping and holding means and inserted into the prepared casting mold, for example a lower box, so that after the tensioning has been released, the upper box is put on and the casting process can be carried out in the usual way. The method according to the invention makes it possible, depending on the design of the casting to be produced, to connect a single core group composed of a plurality of individual cores or also one of a plurality of core groups forming a core assembly for a casting mold as a core set via the clamping and holding means and in the individual treatment steps until it is inserted into the mold. This enables the handling of very complex core groups in this way. It is also possible to connect approaches to be provided for individual core parts which have hitherto been placed individually in a casting mold during the manufacture of the cores, for example by means of an adhesive connection, so that the structure of the core itself is complicated , individual core composed of two or more parts is nevertheless included in the core group, can be provided with the size coating and can then be inserted into the casting mold. The previously required additional inlay work, which always led to the formation of burrs in the transition region between the individual core and the associated basic core, is avoided in this way, since the approach between the core approach and the associated basic core avoids burr formation by covering the entire core group .
Das erfindungsgemäße Verfahren wird anhand eines Fließbildes nachstehend näher erläutert.The process according to the invention is explained in more detail below with the aid of a flow diagram.
Wie aus der Zeichnung ersichtlich, werden in vier Kernform¬ stationen vier einzelne, zur Herstellung eines Gußstückes erforderliche Kerne geformt und in üblicher Weise verfestigt.As can be seen from the drawing, four individual cores required for producing a casting are formed in four core forming stations and solidified in the usual way.
Die Einzelkerne 1, 2, 3 und 4 werden dann im Verfahrens¬ schritt I in eine Setzlehre 5 eingelegt, durch die die gegenseitige Zuordnung der Kerne 1, 2, 3 und 4 fixiert ist. Die Kerne 1, 2, 3 und 4 sind auf ihrer nach außen
weisenden Seite in üblicher Weise mit Kernmarken 6 versehen, die nun so gestaltet sind, daß sie eine nach außenweisende Anlagefläche aufweisen, die zweckmäßigerweise ihrerseits so gestaltet ist, daß einander benachbarte Anlageflächen 7 miteinander fluchten.The individual cores 1, 2, 3 and 4 are then placed in a setting gauge 5 in method step I, by means of which the mutual assignment of the cores 1, 2, 3 and 4 is fixed. The cores 1, 2, 3 and 4 are on their outside facing side in the usual way provided with core marks 6, which are now designed so that they have an outwardly facing contact surface, which in turn is expediently designed such that adjacent contact surfaces 7 are aligned with each other.
Die eine Kerngruppe bildenden, in die Setzlehre 5 eingeleg¬ ten Einzelkerne 1, 2, 3 und 4 werden nunmehr mit einem beispielsweise rahmenförmig ausgebildeten Spann- und Halte¬ mittel 8 fest miteinander verspannt, wobei die gegeneinander gerichteten Ansätze 9 an den einzelnen Kernen 1, 2, 3 und 4, die je nach Gestaltung des zu erzeugenden Gußstückes entweder zur Herstellung von Durchbrüchen in entsprechenden Wandungsteilen des Gußstückes dienen oder aber die ihrer¬ seits als Kernmarken ausgebildet sind, fest aneinander gedrückt werden. Die Kerne können an ihren einander zuge¬ kehrten Anlageflächen 9.1 mit einem sogenannten Grünkleber versehen sein, so daß in diesem Bereich durch eine Verkle¬ bung die Fixierung noch erhöht wird. Bei entsprechender Gestaltung der einzelnen Kerne 1, 2, 3 und 4 ist somit die Möglichkeit gegeben, die einzelnen Kerne über das Spann- und Haltemittel 8 zu einer handhabbaren Einheit 10 zusammen¬ zufassen, wie dies für den anschliessenden Verfahrens¬ schritt II dargestellt ist. Die Verspannung des Spann- und Haltemittels 8 kann nun bei entsprechender Gestaltung durch das Mittel selbst oder aber über einen greifenden und spannenden Manipulator 8.1 erfolgen.The individual cores 1, 2, 3 and 4 forming a core group and inserted into the setting gauge 5 are now firmly clamped together with a clamping and holding means 8, for example, in the form of a frame, the mutually directed projections 9 on the individual cores 1, 2, 3 and 4, which, depending on the design of the casting to be produced, either serve to produce openings in corresponding wall parts of the casting or, on the other hand, are designed as core marks and are firmly pressed together. The cores can be provided with a so-called green adhesive on their mutually facing contact surfaces 9.1, so that in this area the fixation is further increased by adhesive bonding. With a corresponding design of the individual cores 1, 2, 3 and 4, there is thus the possibility of combining the individual cores via the clamping and holding means 8 to form a manageable unit 10, as is shown for the subsequent method step II. The tensioning of the clamping and holding means 8 can now take place with a suitable design by the means itself or via a gripping and exciting manipulator 8.1.
Die zu einer Einheit 10 zusammengefaßte Kerngruppe kann nunmehr in einem Verfahrensschritt III über den Manipu¬ lator 8.1, der das Spann- und Haltemittel 8 am Greifnocken 8.2 erfaßt, weitertransportiert werden und in ein Schlichte¬ bad 11 getaucht werden. Hierbei kann das Spann- und Halte¬ mittel 8 durch den Manipulator 8.1 auch gewendet werden, so daß nach dem Tauchen überschüssige Schlichte abtropfen kann. Da das beispielsweise rahmenförmig ausgebildete Spann- und Haltemittel 8 die als Kerngruppe zusammengefaßten Kerne 1, 2, 3 und 4 nur im Bereich der Kernmarken hält, sind
später beim Gießen die die entsprechenden Bereiche des Gußstückes formenden Oberflächen der Kerngruppe vollständig mit Schlichte überzogen, wobei insbesondere die Spalte zwischen den einzelnen aneinandergrenzenden Kernen 1, 2, 3 und 4 durch die Schlichte verschlossen sind und damit die Bildung von Gußgraten vermieden wird.The core group combined to form a unit 10 can now be transported in a method step III via the manipulator 8.1, which detects the clamping and holding means 8 on the gripping cam 8.2, and immersed in a sizing bath 11. Here, the tensioning and holding means 8 can also be turned by the manipulator 8.1, so that excess size can drip off after immersion. Since the, for example, frame-shaped clamping and holding means 8 holds the cores 1, 2, 3 and 4 combined as a core group only in the area of the core brands later during casting, the surfaces of the core group forming the corresponding areas of the casting are completely covered with size, the gaps between the individual adjacent cores 1, 2, 3 and 4 being closed by the size and thus avoiding the formation of casting burrs.
In dem anschließenden Verfahrensschritt IV muß nummehr die Einheit 10 einer Trocknungseinrichtung 16 zugeführt werden, in der der Schlichteüberzug abgetrocknet wird, beispielsweise durch eine kombiniertes Mikrowellen- und Lufttrockungsverfahren.In the subsequent process step IV, the unit 10 must be fed to a drying device 16 in which the size coating is dried, for example by a combined microwave and air drying process.
Um die Einheit durch die Trocknungseinrichtung zu führen, wird diese vom Manipulator 8.1 in einem bewegbaren Ofen¬ träger 12 abgelegt. Der Ofenträger 12 weist auf zwei gegen¬ überliegenden Seiten Spannwangen 13 auf, die mit ihren nach innen gerichteten Spannflächen 14 nach oben öffnend gegeneinander geneigt sind. Am Spann- und Haltemittel 8 sind zu beiden Seiten des Greifnockens 8.2 diesen jeweils überragende Spannocken 15 angeordnet, die mit einer der Spannfläche 14 entsprechend geneigten Gegenfläche versehen sind, so daß beim Absetzen der Einheit 10 in den OfenträgerIn order to guide the unit through the drying device, the manipulator 8.1 deposits it in a movable oven support 12. The furnace support 12 has clamping cheeks 13 on two opposite sides, which are inclined toward one another with their inwardly facing clamping surfaces 14 opening upwards. Arranged on both sides of the gripping cam 8.2 on the clamping and holding means 8 are clamping cams 15 each projecting therefrom, which are provided with a counter surface corresponding to the clamping surface 14, so that when the unit 10 is placed in the furnace support
12 das Spann- und Haltemittel 8 zwischen den Seitenwangen12 the clamping and holding means 8 between the side cheeks
13 fest eingeklemmt wird. Danach kann der Manipulator 8.1 gelöst werden und die gesamte Anordnung in die Trocknungs¬ einrichtung 16 eingefahren werden.13 is firmly clamped. The manipulator 8.1 can then be released and the entire arrangement can be moved into the drying device 16.
Nach Abschluß der Trocknung wird die in der Einheit 10 zusammengefaßte Kerngruppe aus dem Ofenträger 12 von dem Manipulator 8.1 herausgehoben und nunmehr im nächsten Ver¬ fahrensschritt V in den Unterkasten 17 oder eine Aufbaulehre einer vorbereiteten Gießform eingelegt. Erst jetzt wird das rahmenförmige Spann- und Haltemittel 8 von der Kern¬ gruppe gelöst und entfernt. Anschließend wird im folgenden Verfahrensschritt VI der Oberkasten 18 auf den Unterkasten 17 aufgesetzt und mit diesem fest verbunden, so daß an¬ schließend der Gießvorgang erfolgen kann.
Aus der vorstehenden Beschreibung des Verfahrensablaufes für ein schematisches Ausführungsbeispiel mit einer aus vier Einzelkernen zusammengesetzten Kerngruppe ist ersicht¬ lich, daß auch sehr komplexe Gußstücke nach dem erfindungs¬ gemäßen Verfahren erstellt werden können. So ist es durch¬ aus möglich, mehrere, eine Kernbestückung für eine Gießform bildenden Kerngruppen, die von der Konzeption des Gußstückes untereinander nicht in Verbindung stehen sollen, bei einer entsprechenden Ausgestaltung des Spann- und Haltemittels als vollständigen Kernsatz miteinander zu verbinden und in der nachfolgenden Behandlung, d. h. dem überziehen mit einer Schlichte und dem anschließenden Trocknen bis zum Einlegen in die Gießform zusammenzuhalten.After drying is complete, the core group combined in the unit 10 is lifted out of the oven support 12 by the manipulator 8.1 and is now inserted in the next process step V into the lower case 17 or a set-up gauge for a prepared casting mold. Only now is the frame-shaped clamping and holding means 8 released and removed from the core group. Subsequently, in the following process step VI, the upper box 18 is placed on the lower box 17 and firmly connected to it, so that the casting process can then take place. From the above description of the process sequence for a schematic exemplary embodiment with a core group composed of four individual cores, it is evident that even very complex castings can be produced using the method according to the invention. Thus it is entirely possible to connect several core groups forming a core assembly for a casting mold, which should not be connected to one another from the design of the casting, with a corresponding configuration of the clamping and holding means as a complete core set and in the following Treatment, ie holding together with a size and then drying until it is placed in the mold.
Es ist ohne weiteres ersichtlich, daß durch das Zusammen¬ fassen von einzelnen Kernen zu Kerngruppen und/oder das Zusammenfassen von Kerngruppen zu vollständigen Kernsätzen, der Aufwand für den Transport und die einzelnen Arbeits¬ schritte Tauchen, Trocknen und Einlegen der Kerne in die Gießform minimiert werden. Soweit die Einzelkerne einander zugeordnete Ansätze aufweisen, die zur Erstellung von Durch¬ brüchen im fertigen Gußstück vorgesehen sind, durch den Schlichteüberzug der vollständigen Kerngruppe bzw. des Kernsatzes verschlossen werden, reduzieren sich die nach¬ folgenden Putzarbeiten, insbesondere das Entgraten am ferti¬ gen Gußstück erheblich. Der weitere Vorteil des erfindungs¬ gemäßen Verfahrens besteht darin, daß durch das Einsetzen einer vollständigen Kerngruppe und/oder eines vollständigen Kernsatzes in die Gießform die Maßhaltigkeit verbessert und damit der Ausschuß minimiert wird.It is readily apparent that by combining individual cores into core groups and / or combining core groups into complete core sets, the effort for transport and the individual work steps minimizes dipping, drying and inserting the cores into the casting mold become. Insofar as the individual cores have approaches which are assigned to one another and which are provided for making breakthroughs in the finished casting and are closed by the finishing coat of the complete core group or the core set, the subsequent cleaning work, in particular deburring on the finished casting, is reduced considerably. The further advantage of the method according to the invention is that by inserting a complete core group and / or a complete core set into the casting mold, the dimensional stability is improved and the scrap is thus minimized.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens besteht darin, daß die Taktzeiten beim Abguß der fertigen Formen erhöht werden können, da die für das Einlegen von Kerne benötigte Zeit erheblich reduziert ist.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens be¬ steht außerdem darin, daß eine höhere Flexibilität in bezug auf Kundenanforderungen oder Weiterentwicklungen gegeben ist. Hier ist es lediglich erforderlich, bei der Gestaltung der Kerne dafür Sorge zu tragen, daß einander benachbarte Kerne, auch -wenn diese zwischen sich keine Ansätze zur Bildung von Durchbrüchen aufweisen und die dann ohnehin über Kernmarken verfügen müssen, so gestaltet werden, daß die ohnehin erforderlichen Kernmarken einander unmittelbar berühren, so daß ein Verspannen bei entsprechender Gestal¬ tung der Kernmarken an der Außenseite über ein vorzugsweise rahmenförmiges Spann- und Haltemittel möglich ist.Another advantage of the method according to the invention is that the cycle times when casting the finished molds can be increased, since the time required for inserting cores is considerably reduced. Another advantage of the method according to the invention is that there is greater flexibility with regard to customer requirements or further developments. Here it is only necessary to ensure when designing the cores that neighboring cores, even if these have no approaches between them for the formation of breakthroughs and which must then have core brands anyway, are designed in such a way that necessary core marks touch each other directly, so that a bracing is possible with a corresponding design of the core marks on the outside via a preferably frame-shaped clamping and holding means.
Das erfindungsgemäße Verfahren erlaubt es aber auch, in einem gemeinsamen Spann- und Haltemittel zwei oder mehrere einander zugehörige Kerngruppen zu einem vollständigen Kernsatz zusammenzufassen, ohne daß die einzelnen Kern¬ gruppen selbst über eine entsprechende Anordnung von An¬ sätzen miteinander in Berührung zu bringen sind. Das erfin¬ dungsgemäße Verfahren ist daher auch dann möglich, wenn einzelne Kerngruppen hinsichtlich ihrer Kernmarken keine gemeinsame Spannebene aufweisen. Hier ist es dann möglich, in einem Hauptrahmen die einzelnen Kerngruppen mit geson¬ derten Spann- und Haltemitteln miteinander zu verspannen und für die nachfolgenden Verfahrensschritte bis zum Einlegen in die Gießform zu handhaben.
However, the method according to the invention also allows two or more core groups belonging to one another to be combined into a complete core set in a common clamping and holding means, without the individual core groups themselves having to be brought into contact by means of a corresponding arrangement of approaches. The method according to the invention is therefore also possible if individual core groups do not have a common clamping plane with regard to their core brands. It is then possible here to clamp the individual core groups together in a main frame with special clamping and holding means and to handle them for the subsequent process steps until they are inserted into the casting mold.
Claims
1. Verfahren zum Einbringen von Kernen in eine Gießform, dadurch gekennzeichnet, daß die einzelnen Kerne (1, 2, 3, 4) in eine Setzlehre (5) eingebracht werden, daß die aneinander- grenzenden, eine Kerngruppe bildenden Kerne (1, 2, 3, 4) in der Setzlehre (5) über ein Spann- und Haltemittel (8) miteinander verbunden werden, daß die miteinander verbundene Kerngruppe in ein Schlichtebad (11) getaucht und getrocknet wird, und daß die getrocknete Kerngruppe in die Gießform (17, 18) eingesetzt und dann die Verspannung gelöst wird.1. A method for introducing cores into a casting mold, characterized in that the individual cores (1, 2, 3, 4) are introduced into a setting jig (5), that the adjacent cores (1, 2 , 3, 4) in the setting gauge (5) by means of a clamping and holding means (8), that the interconnected core group is immersed in a size bath (11) and dried, and that the dried core group in the casting mold (17th , 18) and then the tension is released.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mehrere, eine Kernbestückung für eine Gießform bildende Kerngruppen als Kernsatz über ein Spann- und Haltemittel2. The method according to claim 1, characterized in that a plurality of core groups for a casting mold forming core groups as a core set via a clamping and holding means
(8) miteinander verbunden werden, behandelt und in die Gießform eingesetzt werden.(8) connected together, treated and inserted into the mold.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die einander berührenden Anlageflächen (9.1) der Kerne (1, 2, 3, 4) vor dem Einlegen in die Setzlehre (5) mit einem Kleber versehen werden. 3. The method according to claim 1 or 2, characterized in that the contacting contact surfaces (9.1) of the cores (1, 2, 3, 4) are provided with an adhesive before insertion into the setting gauge (5).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19540023A DE19540023A1 (en) | 1995-10-27 | 1995-10-27 | Process for inserting cores into a mold |
| DE19540023 | 1995-10-27 | ||
| PCT/EP1996/002943 WO1997016271A1 (en) | 1995-10-27 | 1996-07-04 | Process for introducing cores into a casting mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0802839A1 true EP0802839A1 (en) | 1997-10-29 |
| EP0802839B1 EP0802839B1 (en) | 1998-12-02 |
Family
ID=7775929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96924883A Expired - Lifetime EP0802839B1 (en) | 1995-10-27 | 1996-07-04 | Process for introducing cores into a casting mould |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6003588A (en) |
| EP (1) | EP0802839B1 (en) |
| JP (1) | JP3894569B2 (en) |
| CN (1) | CN1131746C (en) |
| AT (1) | ATE173965T1 (en) |
| DE (2) | DE19540023A1 (en) |
| DK (1) | DK0802839T3 (en) |
| ES (1) | ES2127647T3 (en) |
| WO (1) | WO1997016271A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6533020B2 (en) * | 2001-06-11 | 2003-03-18 | General Motors Corporation | Casting of engine blocks |
| US6527039B2 (en) * | 2001-06-11 | 2003-03-04 | General Motors Corporation | Casting of engine blocks |
| US6682315B2 (en) * | 2001-11-28 | 2004-01-27 | Caterpillar Inc | Axial piston pump barrel with a cast high pressure collection cavity |
| US20040159985A1 (en) * | 2003-02-18 | 2004-08-19 | Altoonian Mark A. | Method for making ceramic setter |
| CN107598132B (en) * | 2017-09-28 | 2023-07-21 | 苏州明志科技股份有限公司 | Glue injection workbench for sand core assembly |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273182A (en) * | 1979-12-07 | 1981-06-16 | Ford Motor Company | Core assembly and the method of making and using such assembly |
| JPS6213240A (en) * | 1985-07-10 | 1987-01-22 | Kiriyuu Kikai Kk | Method for assembling core and assembled core |
| DE3526265A1 (en) * | 1985-07-23 | 1987-02-05 | Hottinger Adolf Giesserei | CORE OR MASK PACKING MACHINE |
| JPS62230454A (en) * | 1986-03-31 | 1987-10-09 | Mazda Motor Corp | Casting mold for manihold |
| DE3618703A1 (en) * | 1986-06-04 | 1987-12-10 | Bruehl Eisenwerk | METHOD FOR PRODUCING CORE FOR FOUNDRY PURPOSES AND DEVICE FOR IMPLEMENTING THE METHOD |
| EP0290809B1 (en) * | 1987-04-14 | 1996-04-03 | Northrop Grumman Corporation | Manufacturing system using three-dimensional graphics models |
| DE4322181A1 (en) * | 1993-06-29 | 1995-01-12 | Hottinger Adolf Masch | Device and method for gripping a foundry core, in particular a sole core |
-
1995
- 1995-10-27 DE DE19540023A patent/DE19540023A1/en not_active Withdrawn
-
1996
- 1996-07-04 US US08/836,149 patent/US6003588A/en not_active Expired - Fee Related
- 1996-07-04 ES ES96924883T patent/ES2127647T3/en not_active Expired - Lifetime
- 1996-07-04 AT AT96924883T patent/ATE173965T1/en not_active IP Right Cessation
- 1996-07-04 CN CN96191295A patent/CN1131746C/en not_active Expired - Fee Related
- 1996-07-04 DK DK96924883T patent/DK0802839T3/en active
- 1996-07-04 JP JP52976696A patent/JP3894569B2/en not_active Expired - Fee Related
- 1996-07-04 EP EP96924883A patent/EP0802839B1/en not_active Expired - Lifetime
- 1996-07-04 WO PCT/EP1996/002943 patent/WO1997016271A1/en active IP Right Grant
- 1996-07-04 DE DE59600907T patent/DE59600907D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9716271A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE173965T1 (en) | 1998-12-15 |
| EP0802839B1 (en) | 1998-12-02 |
| JP3894569B2 (en) | 2007-03-22 |
| ES2127647T3 (en) | 1999-04-16 |
| WO1997016271A1 (en) | 1997-05-09 |
| DE19540023A1 (en) | 1997-04-30 |
| JPH10511315A (en) | 1998-11-04 |
| CN1131746C (en) | 2003-12-24 |
| US6003588A (en) | 1999-12-21 |
| CN1166801A (en) | 1997-12-03 |
| DE59600907D1 (en) | 1999-01-14 |
| DK0802839T3 (en) | 1999-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE112012000293B4 (en) | Manufacturing method for a rotor of an electric motor | |
| DE102008004773A1 (en) | Method for converting a blow molding machine | |
| EP2946462A2 (en) | Electrotechnical coil and/or coil winding, method for the production thereof and electrical appliance | |
| DE102016012742A1 (en) | Method for producing a sheet metal core | |
| DE112016005293B4 (en) | METHOD OF MANUFACTURING A HOLLOW OBJECT | |
| DE112016006377T5 (en) | Core production machine with integrated microwave curing function | |
| DE3829402A1 (en) | IMPROVEMENTS IN THE DESIGN OF GIESS MOLD CORE PACKAGES | |
| DE112004000027T5 (en) | Motor production plant and method for controlling the same | |
| EP0802839A1 (en) | Process for introducing cores into a casting mould | |
| EP0268656B1 (en) | Process for producing moulds and mould elements for casting purposes, in particular for producing cores, and installation for performing the process | |
| DE102008049644B4 (en) | Mold assembly apparatus and method of assembling a permanent mold assembly with lost moldings | |
| EP3024607B1 (en) | Casting device and casting method | |
| DE3624554A1 (en) | System for the production of a core assembly | |
| WO2018178762A1 (en) | Casting core and method for the production thereof | |
| DE2619528A1 (en) | METHOD AND DEVICE FOR FILLING FOUNDRY SHAPES OR CORE BOXES WITH A MOLD-BASED MIX | |
| DE60011307T2 (en) | METHOD AND DEVICE FOR THE STEP-BY-STEP PROCESSING OF CHILLERS IN A CASTING PLANT | |
| EP0731741B1 (en) | Installation and method for producing ready-to-use casting shells or core assemblies | |
| DE102015223960A1 (en) | Method for producing a cast component | |
| EP1651371A2 (en) | Device for the production of core assemblies | |
| DE102008009092B3 (en) | Casting process to manufacture complex cast form e.g. automotive turbo charger components using soluble binding agent and soluble core insert | |
| DE4341122C2 (en) | Device and method for producing ready-to-cast masks or core packages | |
| DE102021122614A1 (en) | Process for the production of molded parts and plant for carrying out the process | |
| DE102019205282A1 (en) | System and method for producing a molded part | |
| DE10357215A1 (en) | Plastic component handling process involves molding products in sets and fixing the moldings in sets with runners onto a handling base | |
| DE3445732A1 (en) | Method for the production of a mould core to be placed in a casting mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19970417 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE DK ES FR GB IE IT SE |
|
| 17Q | First examination report despatched |
Effective date: 19971117 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE DK ES FR GB IE IT SE |
|
| REF | Corresponds to: |
Ref document number: 173965 Country of ref document: AT Date of ref document: 19981215 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59600907 Country of ref document: DE Date of ref document: 19990114 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: GERMAN |
|
| ET | Fr: translation filed | ||
| ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO ROMA S.P.A. |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19990225 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2127647 Country of ref document: ES Kind code of ref document: T3 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20020722 Year of fee payment: 7 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IE Payment date: 20020730 Year of fee payment: 7 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030704 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030731 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20080723 Year of fee payment: 13 Ref country code: DE Payment date: 20080722 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20080726 Year of fee payment: 13 Ref country code: FR Payment date: 20080718 Year of fee payment: 13 Ref country code: AT Payment date: 20080722 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20080723 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20080724 Year of fee payment: 13 |
|
| EUG | Se: european patent has lapsed | ||
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20090704 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20100331 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090704 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100202 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090704 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20090706 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090706 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090704 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090705 |