EP0878252B1 - Mould for automatic moulding plant and method for producing such a mould - Google Patents
Mould for automatic moulding plant and method for producing such a mould Download PDFInfo
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- EP0878252B1 EP0878252B1 EP98103795A EP98103795A EP0878252B1 EP 0878252 B1 EP0878252 B1 EP 0878252B1 EP 98103795 A EP98103795 A EP 98103795A EP 98103795 A EP98103795 A EP 98103795A EP 0878252 B1 EP0878252 B1 EP 0878252B1
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- Prior art keywords
- mould
- casting
- box
- mold
- moulding
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
Definitions
- the invention relates to a casting mold and a method for Production of a casting mold consisting of one of two mold box halves formed box, the means of transportation has on automatic molding machines and a bound Sand mold picks up, which with cores and with a pouring funnel and a feeder is provided.
- Casting molds with bound molding sands are either made with molding boxes manufactured, which consist of two mold box halves, this molding box is usually frame-shaped is and provided on two of its end faces with running strips with which he is on an automatic roller conveyor Molding machine is transportable.
- This molding box gives the in this bound sand mold has the required strength, so that they can be transported easily can.
- the sand for the mold can be clay-bound, what an inexpensive reprocessing of the molding sand is guaranteed.
- boxless molds are known, which are dependent of the casting from a variety of items these molds are no longer clay-bound, but are chemically bound to be sufficient Strength for their handling and pourability to obtain.
- These chemically bound sand forms require elaborate machines for producing the partial molds, the Cores as well as machines that turn these parts into one Put the mold together. Aside from the high apparatus There is another effort that must be made here Disadvantage in that the sand can only be reprocessed with great effort is. In addition to the expensive molding and assembly device represents a high cost factor.
- boxless forms of green sand which consist of individual identical cuboid blocks are constructed, the part on two opposite sides of the mold cavity.
- pouring spout as well as molded in the feeder.
- These blocks will be then pushed against each other with their mold cavities, so that they complement and support each other.
- the molding sand is shot from above, which means that they are in the shadow of the model Form areas do not get the same hardening as the remaining areas.
- the feeder can also only be limited in form and also essentially only to the side of the actual mold cavity, which severely limits the quality of the feeder. By injecting the molding sand is also a great wear on models received what the procedure makes expensive.
- Molding sand in molding boxes can not only be clay-bound but is also much cheaper in its manufacture.
- the molding box only needs one half of the molding box placed separately on a model plate, then the molding box is filled with sand. After mechanical The mold half is finished compacting the molding sand. This then lies horizontally with the mold cavity turned upwards so that cores are inserted can.
- the mold boxes are placed one above the other for casting, previously in the then upper mold box Mold opening and the feeder incorporated into the molding sand must become. This happens before turning the top one Molding box with rotating tools.
- These mold boxes are then poured horizontally, which is disadvantageous here that for the feeder in the mold only a relatively small one Volume remains and also the supply of the ones below Mold parts are not always optimal.
- the pouring funnel can be produced relatively easily, but prepares the training of the feeder problems, especially since the feeder Reduced cross section, which is used to shoot the sand Available. Such are for the casting of aluminum Casting molds less suitable, especially since large, effective ones Feeders are needed.
- DE-A-26 52 657 relates to a foundry molding device a molding box, which is cast in a standing position is pivoted, wherein the mold division plane is perpendicular. In the mold parting level there is a pouring funnel and a ventilation opening arranged.
- WO 91/12104 describes one Molding box, which is also intended for a standing cast is, the pouring funnel in the parting plane of lies both mold box calves.
- JP-A-55 105 656 is well as from JP-A-55 106 658 a molding box known, which is poured in the lying state, whereby in the mold division level of the upper and lower box cores are inserted. These cores penetrate the mold cavity and are supported in the edge areas.
- the core ventilation is essential Problem that has not yet been solved satisfactorily is.
- the invention has for its object to provide a mold a molding box which has a shape of bound molding sand, to be trained in such a way that they work automatically Molding machines can be used and horizontally in the usual way can be manufactured in which the post-processing of Pouring funnel and the feeder as well as additional ones the feeder to be placed on the mold can be dispensed with and which also has effective ventilation Cores is guaranteed.
- Another object of the invention is a method for the production of such Propose mold.
- the molding box points in the area of its division level a like at least part of the length Recess extending one side of the molding box on, in the area of the recess the pouring funnel and the feeder opens.
- the feeder is in within the sand mold the mold.
- the cores are designed in this way and arranged to penetrate the feeder and above the sand form.
- the mold boxes for casting molds with bound molding sands can So manufactured in a conventional manner, d. H. the frame of the molding box is placed on a model plate, filled with sand and compacted.
- the two mold box halves are manufactured in the same way.
- the difference to conventional mold boxes is that the feeder and the pouring funnel are no longer on the open Side of the mold frame is formed on the top Mold box half, but that the opening in front of the pouring funnel like the feeder in the parting plane of the two mold box halves is misplaced. This means that the casting of the mold no longer like with conventional molds Molded boxes are the case lying horizontally, but standing he follows.
- the feeder and the pouring funnel can cast the mold box with no additional effort during production the mold can be molded, so that any post-processing here not applicable.
- the mold is standing is poured off, usually remains above the casting a room large enough to hold the required volume to accommodate the feeder. This relatively large distance also makes it possible to design the feeder so that the required hydrostatic pressure for the feed is obtained.
- the cores extend with one end upwards and advantageously through the feeder through the opening in the mold frame over the sand of the mold up to the level the pouring opening of the feeder, so that the core ventilation immediately over the pulled out ends of the core can be done.
- the molding box has in the division level, in which the feeder and the pouring funnel are arranged is a recess which in cross section V- or Can be U-shaped. This is advantageous Pouring the casting material in increasing casting, the Pouring channel opens below the casting and over the gate connected to it.
- a molded box is manufactured horizontally, i.e. H. the two halves of the molding box are made in the usual way produced, in contrast to the prior art Pouring funnel and the feeder right in the side of the opening of the molding box is also molded. Through this side The feeder as well as the pouring funnel can be arranged be produced in such a way that post-processing is no longer required.
- the molding boxes are then opened arranged on a roller conveyor and in such a way that the mold cavity points upwards. In this situation the Cores inserted, then one half of the mold over the other is laid in a known manner. In connection the finished casting mold is then turned through 90 °, see above that this now with the pouring opening up on a another now generally narrower roller conveyor is transported further.
- the molding box on the roller conveyor can remain.
- the two halves of the molding box will be then separated in a known manner, turned and the Molding process of the mold begins anew.
- FIG. 1 to 4 is an embodiment of an inventive Casting mold 1 shown.
- the mold is there from two mold halves, each mold half having one Form frame 4, which on one side in the Molding plane has a V-shaped recess 5.
- This V-shaped recess extends, in particular, from Fig. 4 can be seen over part of the width and Length of each mold box half 4.
- the pouring funnel 6 is with connected to a pouring spout 10, which extends to below the Pouring cavity 11 extends and via gates 12 with the Pouring cavity 11 is connected.
- two cores are in the casting cavity 13 inserted, which are provided with an extended end 14 are, which reaches through the feeder 9 and above of the feeder and the sand mold 8 ends. Because of this End 14, that above the food level and the sand mold ends up being an effective core vent as well Venting of the mold guaranteed.
- the recess 5 in the two mold halves 1 and 2 is when they are assembled, V-shaped in cross section educated. It is also conceivable to have a U-shaped one here Provide cutout.
- Each mold box half 4 is provided with running strips 15, with which the molding box on z.
- For the Each half of the molding box is laid on the core Roller conveyor transported and that with the opening of the casting cavity 11 up. This makes it easy to insert of the cores possible without this, as is the case with the moldless molds is the case with special Funds must be kept.
- These cores are in the half of the mold box inserted below while the other Mold box half on the lower horizontal only needs to be hung up. Following this the molding box is turned about its longitudinal axis by 90 °, so that the pouring funnel and the feeder are on top. The cast can then be done.
- the molding box can also be shaped upright, the molding box not being removed from the roller conveyor needs to be. Only the molding sand is needed here including the manufactured casting laterally to be pushed out of the mold frame 4.
- the embodiment 5 to 8 corresponds to the embodiment 1 to 4 with the difference that the feeder 9 is not, as in the embodiment 1 to 4, arranged within the sand mold 8 is and is only accessible via an opening 7, but that here the opening corresponds to the cross section of the feeder. Otherwise the arrangement of the cores is identical, here also the ends 14 of the cores 13 above the level of the maximum Level of the feeder 9 ends.
Abstract
Description
Die Erfindung betrifft eine Gießform sowie ein Verfahren zur Herstellung einer Gießform, bestehend aus einem aus zwei Formkastenhälften gebildeten Formkasten, der Mittel für den Transport auf automatischen Formanlagen aufweist und eine gebundene Sandform aufnimmt, welche mit Kernen und mit einem Eingießtrichter sowie einem Speiser versehen ist.The invention relates to a casting mold and a method for Production of a casting mold consisting of one of two mold box halves formed box, the means of transportation has on automatic molding machines and a bound Sand mold picks up, which with cores and with a pouring funnel and a feeder is provided.
Gießformen mit gebundenen Formsänden werden entweder mit Formkästen hergestellt, die aus zwei Formkastenhälften bestehen, wobei dieser Formkasten in der Regel rahmenförmig ausgebildet ist und an zwei seiner Stirnseiten mit Laufleisten versehen ist, mit denen er auf einer Rollenbahn einer automatischen Formanlage transportierbar ist. Dieser Formkasten gibt der in diesem befindlichen gebundenen Sandform die erforderliche Festigkeit, damit dieser ohne weiteres transportiert werden kann. Der Sand für die Gießform kann tongebunden sein, was eine kostengünstige Wiederaufbereitung des Formsandes gewährleistet. Casting molds with bound molding sands are either made with molding boxes manufactured, which consist of two mold box halves, this molding box is usually frame-shaped is and provided on two of its end faces with running strips with which he is on an automatic roller conveyor Molding machine is transportable. This molding box gives the in this bound sand mold has the required strength, so that they can be transported easily can. The sand for the mold can be clay-bound, what an inexpensive reprocessing of the molding sand is guaranteed.
Ferner sind kastenlose Gießformen bekannt, die in Abhängigkeit des Gußstückes aus einer Vielzahl von Einzelteilen zusammengesetzt sind, wobei diese Gießformen nicht mehr tongebunden, sondern chemisch gebunden sind, um eine ausreichende Festigkeit für ihre Hantierbarkeit und Abgießbarkeit zu erhalten. Diese chemisch gebundenen Sandformen erfordern aufwendige Maschinen zur Herstellung der Teilformen, der Kerne wie auch Maschinen, die diese Teile wiederum zu einer Gießform zusammenfügen. Abgesehen von dem hohen apparativen Aufwand, der hier betrieben werden muß, besteht ein weiterer Nachteil darin, daß der Sand nur aufwendig wiederaufzubereiten ist. Dies stellt neben der teuren Form- und Montagevorrichtung einen hohen Kostenfaktor dar.Furthermore, boxless molds are known, which are dependent of the casting from a variety of items these molds are no longer clay-bound, but are chemically bound to be sufficient Strength for their handling and pourability to obtain. These chemically bound sand forms require elaborate machines for producing the partial molds, the Cores as well as machines that turn these parts into one Put the mold together. Aside from the high apparatus There is another effort that must be made here Disadvantage in that the sand can only be reprocessed with great effort is. In addition to the expensive molding and assembly device represents a high cost factor.
Bekannt sind ferner kastenlose Grünsandformen, die aus einzelnen identischen quaderförmigen Blöcken aufgebaut sind, die auf zwei gegenüberliegenden Seiten jeweils einen Teil des Gießformhohlraumes aufweisen. Hierbei ist der Gießeinlauf wie auch der Speiser mit eingeformt. Diese Blöcke werden dann mit ihren Formhohlräumen gegeneinander geschoben, so daß diese sich zum einen gegenseitig ergänzen und abstützen. Der Formsand wird dabei von oben eingeschossen, was bedeutet, daß die im Schatten des Modells liegenden Formbereiche nicht die gleiche Verfestigung erhalten wie die übrigen Bereiche. Des weiteren kann der Speiser auch nur begrenzt in der Form vorgesehen werden und auch im wesentlichen nur seitlich des eigentlichen Formhohlraumes, was die Qualität des Speisers doch stark beschränkt. Durch das Einschießen des Formsandes wird darüber hinaus auch ein großer Verschleiß an Modellen erhalten, was das Verfahren teuer macht. Ein weiterer Nachteil besteht darin, daß die Kerne in eine seitlich gerichtete Gießform eingelegt werden müssen und dies in der zur Verfügung stehenden Taktzeit, was zum einen aufwendige Automaten erfordert und zum anderen eine gefährliche Handarbeit bedeutet. Ein wesentlicher Nachteil besteht weiter darin, daß derartige kastenlose Grünsandformen nicht für die Herstellung komplizierter Gußstücke, wie z.B. Motorblöcke oder Zylinderköpfe, insbesondere, wenn diese aus Aluminium bestehen, geeignet sind.Also known are boxless forms of green sand, which consist of individual identical cuboid blocks are constructed, the part on two opposite sides of the mold cavity. Here is the pouring spout as well as molded in the feeder. These blocks will be then pushed against each other with their mold cavities, so that they complement and support each other. The molding sand is shot from above, which means that they are in the shadow of the model Form areas do not get the same hardening as the remaining areas. The feeder can also only be limited in form and also essentially only to the side of the actual mold cavity, which severely limits the quality of the feeder. By injecting the molding sand is also a great wear on models received what the procedure makes expensive. Another disadvantage is that the Cores are placed in a side-facing mold must and this in the available cycle time, which on the one hand requires complex machines and on the other hand dangerous manual labor. An essential one Another disadvantage is that such boxless Green sand molds not for the production of complicated castings, such as. Engine blocks or cylinder heads, in particular, if they are made of aluminum, are suitable.
Formsand in Formkästen kann darüber hinaus nicht nur tongebunden sein, sondern ist auch wesentlich kostengünstiger in seiner Herstellung. Für die Herstellung eines derartigen Formkastens muß lediglich je eine Hälfte des Formkastens getrennt auf eine Modellplatte aufgelegt werden, wobei dann der Formkasten mit Sand gefüllt wird. Nach mechanischer Verdichtung des Formsandes ist die Gießformhälfte fertiggestellt. Diese wird dann horizontal liegend mit dem Formhohlraum nach oben gewendet, so daß Kerne eingelegt werden können. Die Formkästen werden zum Abgießen übereinander gelegt, wobei zuvor in die dann obere Formkastenhälfte die Gießformöffnung und der Speiser in den Formsand eingearbeitet werden muß. Dies geschieht vor dem Wenden des oberen Formkastens mit rotierenden Werkzeugen. Diese Formkästen werden dann liegend abgegossen, wobei hier nachteilig ist, daß für den Speiser in der Gießform nur ein relativ geringes Volumen verbleibt und zudem die Speisung der unten liegenden Gießformteile nicht immer optimal erfolgt.Molding sand in molding boxes can not only be clay-bound but is also much cheaper in its manufacture. For the production of such The molding box only needs one half of the molding box placed separately on a model plate, then the molding box is filled with sand. After mechanical The mold half is finished compacting the molding sand. This then lies horizontally with the mold cavity turned upwards so that cores are inserted can. The mold boxes are placed one above the other for casting, previously in the then upper mold box Mold opening and the feeder incorporated into the molding sand must become. This happens before turning the top one Molding box with rotating tools. These mold boxes are then poured horizontally, which is disadvantageous here that for the feeder in the mold only a relatively small one Volume remains and also the supply of the ones below Mold parts are not always optimal.
Bei den kastenlosen chemisch gebundenen Gießformen stellt es hingegen kein Problem dar, den Speiser wie auch den Eingießtrichter gleich mit in die Gießform einzuformen, wobei Speiser und Gießtrichter an der Seite der Gießform angeordnet werden, die für den Abguß des Gußstückes am vorteilhaftesten ist. Die Speisung des erstarrenden Gußstückes ist somit bei kastenlosen, chemisch gebundenen Gießformen gegenüber den Gießformen mit Formkästen wesentlich günstiger. Insbesondere kann hier auf die Maßnahme verzichtet werden, auf dem Formkasten zusätzlich noch einen Speiser aufzusetzen, um den für die Speisung erforderlichen hydrostatischen Druck zu erzeugen. Allerdings sind diese Gießformen nicht nur teuer in Material und Herstellung, sondern erfordern auch extrem hohe Anlageninvestitionen.In the case of the castless, chemically bound casting molds however, it is not a problem, the feeder as well as the pouring funnel to be molded into the mold, whereby The feeder and pouring funnel are arranged on the side of the casting mold be the most advantageous for the casting of the casting is. The feeding of the solidifying casting is thus compared to boxless, chemically bound casting molds the molds with mold boxes much cheaper. In particular, the measure can be dispensed with here. to place an additional feeder on the molding box, the hydrostatic required for the feed To generate pressure. However, these molds are not just that expensive in material and manufacture, but also extremely demanding high investment in equipment.
Bei den kastenlosen Grünsandformen kann zwar der Eingießtrichter relativ problemlos mitgefertigt werden, jedoch bereitet die Ausbildung des Speisers Probleme, zumal der Speiser den Querschnitt verkleinert, der zum Einschießen des Sandes zur Verfügung steht. Für das Gießen von Aluminium sind derartige Gießformen weniger geeignet, zumal hier große wirkungsvolle Speiser benötigt werden.With the boxless green sand molds, the pouring funnel can can be produced relatively easily, but prepares the training of the feeder problems, especially since the feeder Reduced cross section, which is used to shoot the sand Available. Such are for the casting of aluminum Casting molds less suitable, especially since large, effective ones Feeders are needed.
Die DE-A-26 52 657 betrifft eine Gießerei-Formvorrichtung mit einem Formkasten, welcher zum Abguß in eine stehende Stellung verschwenkt wird, wobei die Formteilungsebene lotrecht liegt. In der Formteilungsebene ist ein Gießtrichter und eine Entlüftungsöffnung angeordnet. Die WO 91/12104 beschreibt einen Formkasten, der gleichermaßen für einen stehenden Abguß vorgesehen ist, wobei der Eingießtrichter in der Teilungsebene der beiden Formkastenkälften liegt. Im Gegensatz hierzu ist aus der JP-A-55 105 656 wie auch aus der JP-A-55 106 658 ein Formkasten bekannt, der in liegendem Zustand abgegossen wird, wobei in der Formteilungsebene von Ober- und Unterkasten Kerne eingelegt sind. Diese Kerne durchsetzen den Formhohlraum und stützen sich in den Randbereichen ab. Bei den bekannten Gießformen, seien es kastenlose Gießformen oder auch Gießformen mit Formkästen, stellt die Kernentlüftung ein wesentliches Problem dar, welches bisher nicht zufriedenstellend gelöst ist.DE-A-26 52 657 relates to a foundry molding device a molding box, which is cast in a standing position is pivoted, wherein the mold division plane is perpendicular. In the mold parting level there is a pouring funnel and a ventilation opening arranged. WO 91/12104 describes one Molding box, which is also intended for a standing cast is, the pouring funnel in the parting plane of lies both mold box calves. In contrast, is off JP-A-55 105 656 as well as from JP-A-55 106 658 a molding box known, which is poured in the lying state, whereby in the mold division level of the upper and lower box cores are inserted. These cores penetrate the mold cavity and are supported in the edge areas. With the well-known molds, be it boxless molds or molds with molded boxes, the core ventilation is essential Problem that has not yet been solved satisfactorily is.
Bei den kastenlosen Gießformen wie auch bei den Gießformen mit Formkästen stellt die Kernentlüftung ein wesentliches Problem dar, das bisher nicht zufriedenstellend gelöst ist. With the castless molds as well as with the molds Molded boxes pose a major problem with core ventilation that has not yet been satisfactorily resolved.
Der Erfindung liegt die Aufgabe zugrunde, eine Gießform mit einem Formkasten, der eine Form aus gebundenem Formsand aufweist, so auszubilden, daß diese auf automatisch arbeitenden Formanlagen einsetzbar ist und in üblicher Weise horizontal gefertigt werden kann, bei der auf die Nachbearbeitung des Eingießtrichters und des Speisers wie auch auf zusätzliche auf der Gießform aufzusetzende Speiser verzichtet werden kann und bei der darüber hinaus eine wirkungsvolle Entlüftung auch der Kerne gewährleistet ist. Eine weitere Aufgabe der Erfindung besteht darin, ein Verfahren für die Herstellung einer derartigen Gießform vorzuschlagen.The invention has for its object to provide a mold a molding box which has a shape of bound molding sand, to be trained in such a way that they work automatically Molding machines can be used and horizontally in the usual way can be manufactured in which the post-processing of Pouring funnel and the feeder as well as additional ones the feeder to be placed on the mold can be dispensed with and which also has effective ventilation Cores is guaranteed. Another object of the invention is a method for the production of such Propose mold.
Diese Aufgabe wird für eine Gießform mit den Merkmalen des Anspruches 1 gelöst. Der Formkasten weist im Bereich seiner Teilungsebene eine sich über zumindest einen Teil der Länge wie Breite einer Seite des Formkastens erstreckende Ausnehmung auf, wobei im Bereich der Ausnehmung der Eingießtrichter sowie der Speiser mündet. Der Speiser ist innerhalb der Sandform in der Gießform ausgebildet. Die Kerne sind derart ausgebildet und angeordnet, daß sie den Speiser durchsetzen und oberhalb der Sandform münden.This task is for a mold with the features of the claim 1 solved. The molding box points in the area of its division level a like at least part of the length Recess extending one side of the molding box on, in the area of the recess the pouring funnel and the feeder opens. The feeder is in within the sand mold the mold. The cores are designed in this way and arranged to penetrate the feeder and above the sand form.
Die Formkästen für Gießformen mit gebundenen Formsänden können also in herkömmlicher Art und Weise hergestellt werden, d. h. der Rahmen des Formkastens wird auf eine Modellplatte aufgelegt, mit Sand abgefüllt und verdichtet. Die beiden Formkastenhälften werden in gleicher Art und Weise hergestellt. Der Unterschied zu den herkömmlichen Formkästen besteht darin, daß der Speiser und der Eingießtrichter nicht mehr auf der offenen Seite des Formrahmens ausgebildet ist und zwar auf der oberen Formkastenhälfte, sondern daß die Öffnung vor dem Gießtrichter wie auch der Speiser in die Teilungsebene der beiden Formkastenhälften verlegt ist. Dies bedingt, daß der Abguß der Gießform nicht mehr, wie dies bei herkömmlichen Gießformen mit Formkästen der Fall ist, horizontal liegend, sondern stehend erfolgt. Durch die Verlegung der Eingießöffnung wie auch des Speisers in die Formteilebene und den dadurch bedingten stehenden Abguß des Formkastens kann der Speiser und der Eingießtrichter ohne zusätzlichen Aufwand gleich bei der Herstellung der Gießform mit eingeformt werden, so daß hier jegliche Nachbearbeitung entfällt. Da darüber hinaus die Gießform stehend abgegossen wird, verbleibt in der Regel oberhalb des Gußstükkes ein ausreichend großer Raum, um das erforderliche Volumen für den Speiser unterzubringen. Dieser relativ große Abstand ermöglicht es auch, den Speiser so auszubilden, daß der erforderliche hydrostatische Druck für die Speisung erhalten wird.The mold boxes for casting molds with bound molding sands can So manufactured in a conventional manner, d. H. the frame of the molding box is placed on a model plate, filled with sand and compacted. The two mold box halves are manufactured in the same way. The The difference to conventional mold boxes is that the feeder and the pouring funnel are no longer on the open Side of the mold frame is formed on the top Mold box half, but that the opening in front of the pouring funnel like the feeder in the parting plane of the two mold box halves is misplaced. This means that the casting of the mold no longer like with conventional molds Molded boxes are the case lying horizontally, but standing he follows. By laying the pouring opening as well as the Feeder in the molded part level and the resulting standing The feeder and the pouring funnel can cast the mold box with no additional effort during production the mold can be molded, so that any post-processing here not applicable. In addition, the mold is standing is poured off, usually remains above the casting a room large enough to hold the required volume to accommodate the feeder. This relatively large distance also makes it possible to design the feeder so that the required hydrostatic pressure for the feed is obtained.
Die Kerne reichen gemäß der Erfindung mit ihrem einen Ende nach oben und vorteilhaft durch den Speiser durch die Öffnung in den Formrahmen über den Sand der Gießform bis über das Niveau der Eingießöffnung des Speisers, so daß die Kernentlüftung unmittelbar über die herausgezogenen Enden des Kernes erfolgen kann. Hierdurch wird die Gefahr von Gußfehlern wesentlich herabgesetzt. Der Formkasten besitzt in der Teilungsebene, in der der Speiser und der Eingießtrichter angeordnet ist, eine Ausnehmung, die im Querschnitt V- oder U-förmig ausgebildet sein kann. Vorteilhaft erfolgt das Eingießen des Gießmaterials in steigendem Guß, wobei der Gießkanal unterhalb des Gußstückes mündet und über Anschnitt mit diesem verbunden ist.According to the invention, the cores extend with one end upwards and advantageously through the feeder through the opening in the mold frame over the sand of the mold up to the level the pouring opening of the feeder, so that the core ventilation immediately over the pulled out ends of the core can be done. This increases the risk of casting errors significantly reduced. The molding box has in the division level, in which the feeder and the pouring funnel are arranged is a recess which in cross section V- or Can be U-shaped. This is advantageous Pouring the casting material in increasing casting, the Pouring channel opens below the casting and over the gate connected to it.
Die Herstellung eines Formkastens erfolgt liegend, d. h. die beiden Hälften des Formkastens werden in üblicher Weise hergestellt, wobei im Gegensatz zum Stand der Technik der Eingießtrichter und der Speiser gleich seitlich in der Öffnung des Formkastens mit eingeformt wird. Durch diese seitliche Anordnung kann der Speiser wie auch der Eingießtrichter derart hergestellt werden, daß eine Nachbearbeitung nicht mehr erforderlich ist. Die Formkästen werden dann auf einer Rollenbahn angeordnet und zwar derart, daß der Formhohlraum nach oben zeigt. In dieser Lage werden dann die Kerne eingelegt, wobei dann die eine Gießformhälfte über die andere in bekannter Art und Weise gelegt wird. Im Anschluß hieran wird die fertige Gießform um 90° gewendet, so daß diese nunmehr mit der Eingießöffnung nach oben auf einer weiteren nunmehr in der Regel schmaleren Rollenbahn weitertransportiert wird. In dieser Lage wird die Gießform abgegossen. Nach dem Erstarren der Gießform wird vorteilhaft in der aufrecht stehenden Form über einen Stempel der Formsand einschließlich dem Gußstück aus dem Formrahmen herausgedrückt, wobei der Formkasten auf der Rollenbahn verbleiben kann. Die beiden Hälften des Formkastens werden dann in bekannter Weise wieder getrennt, gewendet und der Abformvorgang der Gießform beginnt von neuem. A molded box is manufactured horizontally, i.e. H. the two halves of the molding box are made in the usual way produced, in contrast to the prior art Pouring funnel and the feeder right in the side of the opening of the molding box is also molded. Through this side The feeder as well as the pouring funnel can be arranged be produced in such a way that post-processing is no longer required. The molding boxes are then opened arranged on a roller conveyor and in such a way that the mold cavity points upwards. In this situation the Cores inserted, then one half of the mold over the other is laid in a known manner. In connection the finished casting mold is then turned through 90 °, see above that this now with the pouring opening up on a another now generally narrower roller conveyor is transported further. In this position, the mold poured. After the mold solidifies, it becomes advantageous in the upright form over a stamp of Molding sand including the casting from the molding frame pushed out, the molding box on the roller conveyor can remain. The two halves of the molding box will be then separated in a known manner, turned and the Molding process of the mold begins anew.
Ein Ausführungsbeispiel der Erfindung ist im folgenden anhand der Zeichnungen näher beschrieben. In diesen zeigen:
- Fig. 1
- einen Schnitt in der Teilungsebene eines Formkastens,
- Fig. 2
- zwei zu einer Gießform zusammengefügte Formkastenhälften gemäß Schnitt nach Linie 2-2 in Fig. 1,
- Fig. 3
- einen Schnitt nach Linie 3-3 in Fig. 1,
- Fig. 4
- eine Draufsicht auf einen Formkasten gemäß Fig. 1,
- Fig. 5
- einen Schnitt gemäß Fig. 1, jedoch mit einem Speiser, der bis zur Oberfläche der Gießform reicht,
- Fig. 6
- einen Schnitt nach Linie 6-6 in Fig. 5,
- Fig. 7
- einen Schnitt nach Linie 7-7 in Fig. 5 und
- Fig. 8
- eine Draufsicht auf Fig. 5.
- Fig. 1
- a section in the parting plane of a molding box,
- Fig. 2
- two molded box halves joined to form a casting mold according to the section along line 2-2 in FIG. 1,
- Fig. 3
- a section along line 3-3 in Fig. 1,
- Fig. 4
- 2 shows a plan view of a molding box according to FIG. 1,
- Fig. 5
- 2 shows a section according to FIG. 1, but with a feeder that extends to the surface of the casting mold,
- Fig. 6
- 5 shows a section along line 6-6 in FIG. 5,
- Fig. 7
- a section along line 7-7 in Fig. 5 and
- Fig. 8
- 5 shows a plan view of FIG. 5.
In den Fig. 1 bis 4 ist eine Ausführungsform einer erfindungsgemäßen
Gießform 1 dargestellt. Die Gießform besteht
aus zwei Gießformhälften, wobei jede Gießformhälfte einen
Formrahmen 4 aufweist, der an seiner einer Seite in der
Formteilebene eine V-förmige Aussparung 5 aufweist. Diese
V-förmige Aussparung erstreckt sich, wie insbesondere aus
Fig. 4 ersichtlich ist, über einen Teil der Breite und der
Länge jeder Formkastenhälfte 4. Hierdurch wird eine Öffnung
auf den Formsand im Formkasten freigegeben, wobei im Bereich
der Aussparung 5 der Eingießtrichter 6 und die Öffnung
7 für den im Inneren des gebundenen Sandes 8 angeordneten
Speisers 9 angebracht ist. Der Gießtrichter 6 ist mit
einem Gießeinlauf 10 verbunden, der sich bis unterhalb des
Gießhohlraumes 11 erstreckt und über Anschnitte 12 mit dem
Gießhohlraum 11 verbunden ist.1 to 4 is an embodiment of an inventive
Casting mold 1 shown. The mold is there
from two mold halves, each mold half having one
In den Gießhohlraum sind im Ausführungsbeispiel zwei Kerne
13 eingelegt, die mit einem verlängerten Ende 14 versehen
sind, welches jeweils durch den Speiser 9 greift und oberhalb
des Speisers und der Sandform 8 endet. Durch dieses
Ende 14, das oberhalb des Speiserniveaus und der Sandgießform
endet, ist eine effektive Kernentlüftung wie auch eine
Entlüftung der Gießform gewährleistet.In the exemplary embodiment, two cores are in the
Die Aussparung 5 in den beiden Gießformhälften 1 und 2 ist,
wenn diese zusammengesetzt sind, im Querschnitt V-förmig
ausgebildet. Es ist auch denkbar, hier einen U-förmigen
Ausschnitt vorzusehen.The
Jede Formkastenhälfte 4 ist mit Laufleisten 15 versehen,
mit denen der Formkasten auf z. B. Rollenbahnen horizontal
liegend transportiert werden kann, aber auch auf entsprechend
schmaler angeordneten Rollenbahnen stehend. Für die
Kerneinlegung wird jede Formkastenhälfte liegend auf der
Rollenbahn transportiert und zwar mit der Öffnung des Gießhohlraumes
11 nach oben. Hierdurch ist eine einfache Einlegung
der Kerne möglich, ohne daß diese, wie dies bei den
formkastenlosen Gießformen der Fall ist, mit besonderen
Mitteln gehalten werden müssen. Diese Kerne werden in die
unten liegende Formkastenhälfte eingelegt, während die andere
Formkastenhälfte auf die untere horizontal liegende
lediglich aufgelegt zu werden braucht. Im Anschluß hieran
wird der Formkasten um seine Längsachse um 90° gewendet, so
daß der Gießtrichter und der Speiser oben liegen. Der Abguß
kann dann durchgeführt werden. Each
Das Ausformen des Formkastens kann gleichfalls stehend erfolgen,
wobei der Formkasten nicht von der Rollenbahn abgenommen
zu werden braucht. Hier braucht lediglich der Formsand
einschließlich des hergestellten Gußstückes seitlich
aus dem Formrahmen 4 herausgedrückt zu werden. Das Ausführungsbeispiel
nach den Fig. 5 bis 8 entspricht dem Ausführungsbeispiel
nach den Fig. 1 bis 4 mit dem Unterschied,
daß der Speiser 9 nicht, wie in dem Ausführungsbeispiel
nach den Fig. 1 bis 4, innerhalb der Sandform 8 angeordnet
ist und nur über eine Öffnung 7 zugänglich ist, sondern daß
hier die Öffnung dem Querschnitt des Speiser entspricht.
Ansonsten ist die Anordnung der Kerne identisch, wobei hier
auch die Enden 14 der Kerne 13 oberhalb des Niveaus der maximalen
Füllstandshöhe des Speisers 9 enden.The molding box can also be shaped upright,
the molding box not being removed from the roller conveyor
needs to be. Only the molding sand is needed here
including the manufactured casting laterally
to be pushed out of the
Claims (6)
- A casting mould (1), comprising a moulding box which is formed by two moulding-box halves (4) and which is provided with means (15) for conveying to automatic casting plants and receives a bound sand mould (8) which is provided with cores (13) and with a pouring funnel (6) as well as a feeding means (9),
characterized in that
the moulding box (4) is provided in the region of its separation plane with a recess (5) extending over at least part of the length as well as the width of one side of the moulding box (4), the pouring funnel (6) and the feeding means (9) open in the region of the recess, the feeding means (9) is formed inside the sand mould (8) in the casting mould (1), and the cores (13) are designed and arranged in such a way that they pass through the feeding means (9) and open above the sand mould. - A casting mould according to Claim 1, characterized in that the pouring channel (10) extends at the side of and below the casting cavities (11) in the sand mould.
- A casting mould according to Claim 1 or 2, characterized in that the cross-section of the recess (5) in the moulding box (4) is made V-shaped or U-shaped.
- A method of producing a casting mould according to one of Claims 1 to 3, characterized in that each moulding-box half is filled with sand and shaped in the horizontal state, wherein the feeding means, the pouring funnel and the apertures for the cores are jointly formed in the sand mould in the same operation, next the moulding-box halves are turned with the plane of the moulded parts and thus with the moulding cavity upwards in order to insert the cores, the cores are arranged in the sand mould in such a way that they emerge from the sand mould with an extended end, wherein one or more cores pass through the feeding means, and the moulding-box halves are then joined and turned through 90° in such a way that the casting takes place into the vertical casting mould.
- A method according to Claim 4, characterized in that the casting mould is filled in a rising casting procedure.
- A method according to Claim 5, characterized in that fresh metal is poured into the feeding means or into the opening of the feeding means approximately at the moment at which the moulding cavity of the casting mould is filled with liquid metal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19720056 | 1997-05-14 | ||
| DE19720056A DE19720056A1 (en) | 1997-05-14 | 1997-05-14 | Casting mold for automatically working molding plants and process for the production of the casting molds |
| US09/256,169 US6244328B1 (en) | 1997-05-14 | 1999-02-23 | Mold for automatically working mold systems and a process for the manufacture of the molds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0878252A1 EP0878252A1 (en) | 1998-11-18 |
| EP0878252B1 true EP0878252B1 (en) | 2000-04-12 |
Family
ID=26036523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98103795A Expired - Lifetime EP0878252B1 (en) | 1997-05-14 | 1998-03-04 | Mould for automatic moulding plant and method for producing such a mould |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6244328B1 (en) |
| EP (1) | EP0878252B1 (en) |
| AT (1) | ATE191664T1 (en) |
| DE (2) | DE19720056A1 (en) |
| ES (1) | ES2145634T3 (en) |
| PL (1) | PL326238A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE297823T1 (en) * | 1999-07-02 | 2005-07-15 | Int Engine Intellectual Prop | METHOD AND DEVICE FOR CASTING |
| KR20020060715A (en) * | 1999-10-15 | 2002-07-18 | 로라멘디, 에스.아. | Method for metal casting in green-sand molds and casting gutter sealing device |
| JP3592251B2 (en) * | 2001-03-30 | 2004-11-24 | 日信工業株式会社 | Reduction casting method, reduction casting apparatus and molding die used therefor |
| DE102006058145A1 (en) | 2006-12-09 | 2008-06-12 | Ksm Castings Gmbh | Method for processing, in particular casting, a material, casting mold for carrying out the method and articles produced by the method or in the casting mold |
| US8387678B1 (en) * | 2011-11-18 | 2013-03-05 | General Electric Company | Sensor aided direct gating for metal casting |
| CN105382205B (en) * | 2015-12-07 | 2017-06-13 | 大连金河铸造有限公司 | The modified technique of fuel tank cast casting |
| CN107999699B (en) * | 2018-01-24 | 2023-06-02 | 江西力天机械有限公司 | Lost foam casting die |
| CN108405813A (en) * | 2018-05-10 | 2018-08-17 | 江苏凌特精密机械有限公司 | A kind of middle case class product mold |
| CN110681846A (en) * | 2019-09-30 | 2020-01-14 | 山西江淮重工有限责任公司 | Horizontal modeling vertical differential pressure pouring device and pouring method for aluminum alloy special-shaped structural part |
| PL241319B1 (en) * | 2020-11-02 | 2022-09-05 | Lothar Thoni | Hybrid casting mold and method of making a hybrid casting mold, especially for the production of castings from metal alloys |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1542857A (en) | 1975-11-21 | 1979-03-28 | Workman J | Moulding apparatus |
| JPS55106656A (en) * | 1979-02-09 | 1980-08-15 | Hitachi Metals Ltd | Mold |
| JPS55106658A (en) * | 1979-02-09 | 1980-08-15 | Hitachi Metals Ltd | Mold of pipe joint |
| FR2579494A1 (en) * | 1985-03-28 | 1986-10-03 | Fouquet Jean Paul | Method for casting alloyed steels and alloys, by gravity, in a permanent mould, permitting the manufacture of a finished metal product of the ingot type, of radio soundness and in a small quantity |
| WO1991012104A1 (en) * | 1990-02-16 | 1991-08-22 | Combustion Engineering, Inc. | Vertical pour casting process |
-
1997
- 1997-05-14 DE DE19720056A patent/DE19720056A1/en not_active Withdrawn
-
1998
- 1998-03-04 EP EP98103795A patent/EP0878252B1/en not_active Expired - Lifetime
- 1998-03-04 ES ES98103795T patent/ES2145634T3/en not_active Expired - Lifetime
- 1998-03-04 DE DE59800122T patent/DE59800122D1/en not_active Expired - Lifetime
- 1998-03-04 AT AT98103795T patent/ATE191664T1/en not_active IP Right Cessation
- 1998-05-11 PL PL98326238A patent/PL326238A1/en unknown
-
1999
- 1999-02-23 US US09/256,169 patent/US6244328B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| PL326238A1 (en) | 1998-11-23 |
| DE19720056A1 (en) | 1998-11-19 |
| DE59800122D1 (en) | 2000-05-18 |
| ATE191664T1 (en) | 2000-04-15 |
| US6244328B1 (en) | 2001-06-12 |
| ES2145634T3 (en) | 2000-07-01 |
| EP0878252A1 (en) | 1998-11-18 |
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