WO2002004147A1 - Device for producing castings that comprises a wall which can be guided into the casting mold - Google Patents

Device for producing castings that comprises a wall which can be guided into the casting mold Download PDF

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Publication number
WO2002004147A1
WO2002004147A1 PCT/DE2001/002486 DE0102486W WO0204147A1 WO 2002004147 A1 WO2002004147 A1 WO 2002004147A1 DE 0102486 W DE0102486 W DE 0102486W WO 0204147 A1 WO0204147 A1 WO 0204147A1
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WO
WIPO (PCT)
Prior art keywords
mold
chamber
walls
wall
casting mold
Prior art date
Application number
PCT/DE2001/002486
Other languages
German (de)
French (fr)
Inventor
Christian Boehnke
Original Assignee
Ing. Walter Hengst Gmbh & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ing. Walter Hengst Gmbh & Co. Kg filed Critical Ing. Walter Hengst Gmbh & Co. Kg
Priority to JP2002508591A priority Critical patent/JP2004502549A/en
Priority to EP01953863A priority patent/EP1301301A1/en
Priority to KR1020027003013A priority patent/KR20020064281A/en
Priority to BR0106937-3A priority patent/BR0106937A/en
Publication of WO2002004147A1 publication Critical patent/WO2002004147A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting

Definitions

  • the invention relates to a device according to the preamble of
  • a generic device is known from EP 1 046 444 A1. With three pistons, a variable volume chamber is created for the material to be injected. Two pistons are axially movable in a tubular cavity, and a third piston can be moved transversely to the longitudinal axis of the chamber between the two aforementioned pistons in order to transport the material into the mold cavity. This requires a precise seal between the three pistons from each other and from the chamber. With regard to the space requirement and the demands on the authenticity, the generic device is very expensive to manufacture.
  • DE 199 14 830 A1 describes a device in which two walls designed as a valve and as a piston are axially movable in a tubular cavity.
  • DE 43 10 755 A1 describes a device in which two walls designed as a non-driven, movable clamping disk and as a driven piston are axially movable in a tubular cavity. They border on a sprue, through which the material to be injected enters the actual mold cavity.
  • Interchangeable mold inserts are known from "Ernst Brunnhuber” Modern Die Casting Production “Fachverlag Schiele and Schön GmbH, Berlin, 1971, pages 137 and 139", which can form parts of the wall of the mold cavity.
  • the present invention has for its object to improve a generic device so that it is as powerful as possible, compact dimensions and can be operated as inexpensively.
  • the invention proposes not to arrange the movable chamber walls exclusively outside the casting mold, but to enable the chamber contents to be shifted into the casting mold. In this way, material savings can be achieved since the sprue can be avoided or significantly reduced. As a result, the amount of material to be fed into the circuit can be reduced, which has to be cooled again in each circuit and then melted again and which may have a burn-up of expensive alloy elements, this burn-up always having to be supplemented.
  • the sprue can be reduced or can be omitted entirely reduces the amount of heated material and thus also the temperature load on the injection unit and the mold itself, so that shorter cooling phases are possible and consequently a higher number of units per unit time can be produced, so that the performance of the system is improved.
  • the material passes directly from the chamber into the casting mold without an intermediate injection channel enables large flow cross sections and, if necessary, deflections of the material flow can thereby be avoided.
  • the material therefore does not have to be heated as high as to allow for an optimal flow of comparatively small inflow channels into the mold or for long paths to flow through. In this way, a lower temperature level of the melt can be set, so that this measure also reduces the temperature load on the device and — as already mentioned — shortens cooling times and increases the performance of the device.
  • the injection unit extends into the casting mold and is not arranged exclusively outside the casting mold, the device can be produced with compact dimensions. This is made possible in particular by the fact that one of the two walls can not only be brought up to the casting mold, but can also be guided into the casting mold.
  • One of the two movable walls of the chamber of the injection unit can advantageously be formed as part of that wall of the mold cavity which is designed to be movable for opening the mold. In this way, complicated multi-axis movements can be avoided and it is ensures that when opening the mold this wall of the injection unit, which can be guided into the casting mold, is moved together with the part of the casting mold to be opened, so that the accessibility to the casting can be maintained unchanged when the mold is open and allows optimum accessibility for removing the casting.
  • Fig. 1 to 6 an apparatus for producing castings in different phases of a casting process.
  • Fig. 1, 1 generally designates a device for
  • the device 1 has a two-part mold 2, which is in its closed arrangement in FIG. 1. Furthermore, the device 1 has an injection unit 3, which serves to inject the flowable material into the mold 2. 1 shows the injection unit 3 in an initial phase of its filling process:
  • a conveyor unit 4 conveys molten or at least partially molten material into a chamber 5 of the injection unit 3.
  • the chamber walls are formed by a round tube 6, an injection piston 7 and a sealing piston 8.
  • Fig. 1 the volume of the chamber 5 is comparatively small.
  • the chamber volume can possibly be completely minimized by bringing the two pistons 7 and 8 together. In any case, it is ensured that even oxidation-friendly material can be processed without any problems, because contact with ambient air can be largely avoided.
  • the material will conveyed by the delivery unit 4 into the chamber 5 and adapted to the amount of material flowing in, the sealing piston 8 is increasingly removed from the injection piston 7, as shown in FIG. 2.
  • Fig. 2 shows the injection unit 3 in an end phase of its filling process when the injection unit 3 is largely filled with the material to be cast.
  • the volume of the chamber 5 has increased accordingly, and the injection piston 7 is still in a position in which the access from the delivery unit 4 into the chamber 5 is open.
  • Chamber 5 closed opposite the delivery unit 4.
  • the sealing piston 8 is led out of the tube 6 and into the form 2. This opens the tube 6 and thus the chamber 5. A further movement of the injection piston 7 causes the material from the chamber 5 to be injected into the mold 2.
  • the end position of the injection piston 7 can be seen from FIG. 4.
  • the sealing piston 8 is located within the casting mold 2 in a position in which it forms part of the wall of the casting mold 2, which delimits a mold cavity 9 which determines the later contour of the casting.
  • it is a casting, for. B. a rotationally symmetrical component such as a wheel, a cover or the like.
  • the shaping of the sealing piston 8 is directly involved and can be contoured accordingly to determine the desired surface profile of the casting.
  • the sprue point is shifted into the casting, so that advantageously a "sprue" in the conventional sense, that is to say a part, which has to be removed from the casting and can only be used as a recycle material is eliminated.
  • one or more individual end products are arranged radially around the area of the two pistons 7 and 8, so that the casting produced comprises on the one hand this number of products and a sprue which extends from the area between the pistons 7 and 8 extends to these products.
  • the sprue is therefore minimal and has no components that lead out of the actual casting mold 2.
  • the injection piston 7 can be guided further than shown in FIG. 3 in order to keep the material thickness of the sprue as small as possible.
  • the casting mold 2 consists of a stationary molded part 10 and a mold part 11 which is movable relative thereto.
  • the sealing piston 8 is mounted within the movable mold part 11 and can be moved together or separately with the movable mold part 11, so that after opening the mold 2 the removal of the
  • Casting can take place unhindered with the same good accessibility as in a conventional injection unit, in which all components are arranged outside the mold 2.
  • the movable molded part 11 can be brought back to the fixed molded part 10 of the casting mold.
  • the sealing piston 8 is again guided to the injection piston 7 remaining in its end position. 6 that the sealing piston 8 is preferably brought up to the injection piston 7 in order to enable a minimal volume of the chamber 5 before the mold 2 is completely closed. In this way, the escape of the ambient atmosphere can be easily made, so that the chamber 5 with minimal
  • Chamber volume is set. For safety reasons only In order to avoid mechanical damage to the pistons 7 and 8, the piston control shown does not allow the pistons 7 and 8 to rest directly against one another.
  • the mold 2 is closed, i. H. the movable molded part 11 is completely brought up to the fixed molded part 10 and then the clamping plates of the casting mold 2 are locked in order to absorb the injection pressures.
  • An advantage of a device according to the invention is that the sealing piston 8 can be supported on the movable molded part 11 during the injection process, so that there is no need for a separate support for the sealing piston 8 in terms of cost and construction, since those acting on the sealing piston 8 Injection pressures are taken from the mold 2 or from the clamping plates.
  • Casting mold 2 has been closed, the chamber 5 is displaced by a movement of the two pistons 7 and 8 in the same direction and at the same speed until the chamber 5 is in front of the opening of the conveyor unit 4, so that a new working cycle can take place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

The invention relates to a device for producing castings from flowable or strewable starting material. Said device comprises an injection unit, out of which the at least partially liquefied material can be injected into a casting mold. The injection unit has an inlet opening for supplying the material, and the injection unit has a chamber with two moveable walls. These walls can either be moved together in one direction or in opposite directions in such a manner that the volume of the interior of the chamber can be altered as desired and/or the interior of the chamber can be displaced, whereby one or both walls form a portion of the wall delimiting the mold cavity. The invention provides that both walls each form a portion of the wall delimiting the mold cavity, whereby one of the walls can be guided into the casting mold.

Description

"Vorrichtung zum Herstellen von Gußstücken, mit in die Gießform führbarer Wandung""Device for producing castings, with a wall that can be guided into the casting mold"
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff desThe invention relates to a device according to the preamble of
Anspruches 1.Claim 1.
Aus der EP 1 046 444 A1 ist eine gattungsgemäße Vorrichtung bekannt. Mittels dreier Kolben wird dort eine volumenveränderli- eher Kammer für das einzuspritzende Material geschaffen. Dabei sind zwei Kolben in einem rohrartigen Hohlraum axial beweglich, und ein dritter Kolben kann quer zu der Kammerlängsachse zwischen die beiden vorgenannten Kolben gefahren werden, um das Material in den Formhohlraum zu transportieren. Dabei bedarf es einer präzisen Abdichtung zwischen den drei Kolben untereinander und gegenüber der Kammer. Hinsichtlich des Platzbedarfs und der Ansprüche an die Dchtigkeit ist die gattungsgemäße Vorrichtung sehr aufwendig herzustellen. In der DE 199 14 830 A1 wird eine Vorrichtung beschrieben, bei der zwei als Ventil und als Kolben ausgestaltete Wandungen in einem rohrartigen Hohlraum axial beweglich sind. Sie grenzen an einen Angießkanal, durch welchen das einzuspritzende Material in den eigentlichen Formhohlraum gelangt. In der DE 43 10 755 A1 wird eine Vorrichtung beschrieben, bei der zwei als nicht angetrieben, beweglich Klemmscheibe und als angetriebener Kolben ausgestaltete Wandungen in einem rohrartigen Hohlraum axial beweglich sind. Sie grenzen an einen Angießkanal, durch welchen das einzuspritzende Material in den eigentlichen Formhohlraum gelangt.A generic device is known from EP 1 046 444 A1. With three pistons, a variable volume chamber is created for the material to be injected. Two pistons are axially movable in a tubular cavity, and a third piston can be moved transversely to the longitudinal axis of the chamber between the two aforementioned pistons in order to transport the material into the mold cavity. This requires a precise seal between the three pistons from each other and from the chamber. With regard to the space requirement and the demands on the authenticity, the generic device is very expensive to manufacture. DE 199 14 830 A1 describes a device in which two walls designed as a valve and as a piston are axially movable in a tubular cavity. They border on a sprue, through which the material to be injected enters the actual mold cavity. DE 43 10 755 A1 describes a device in which two walls designed as a non-driven, movable clamping disk and as a driven piston are axially movable in a tubular cavity. They border on a sprue, through which the material to be injected enters the actual mold cavity.
Aus „Ernst Brunnhuber „Moderne Druckgussfertigung" Fachverlag Schiele und Schön GmbH, Berlin, 1971 , Seiten 137 und 139" sind auswechselbare Formeinsätze bekannt, die Teile der Wandung des Formhohlraums bilden können.Interchangeable mold inserts are known from "Ernst Brunnhuber" Modern Die Casting Production "Fachverlag Schiele and Schön GmbH, Berlin, 1971, pages 137 and 139", which can form parts of the wall of the mold cavity.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung dahingehend zu verbessern, daß diese möglichst leistungsfähig ist, kompakte Abmessungen ermöglicht und möglichst kostengünstig betrieben werden kann.The present invention has for its object to improve a generic device so that it is as powerful as possible, compact dimensions and can be operated as inexpensively.
Diese der Erfindung zugrundeliegende Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Anspruches 1 gelöst.This object on which the invention is based is achieved by a device having the features of claim 1.
Die Erfindung schlägt mit anderen Worten vor, die beweglichen Kammerwände nicht ausschließlich außerhalb der Gießform anzuordnen, sondern eine Verschiebung des Kammerinhaltes bis in die Gießform zu ermöglichen. Auf diese Weise kann eine Ma- terialeinsparung bewirkt werden, da der Anguß vermieden oder erheblich verkleinert werden kann. Demzufolge kann die im Kreislauf zu führende Materialmenge verringert werden, die bei jedem Kreislauf erneut abgekühlt und anschließend wieder aufgeschmolzen werden muß und die ggf. einen Abbrand von teu- ren Legierungselementen aufweist, wobei dieser Abbrand stets ergänzt werden muß.In other words, the invention proposes not to arrange the movable chamber walls exclusively outside the casting mold, but to enable the chamber contents to be shifted into the casting mold. In this way, material savings can be achieved since the sprue can be avoided or significantly reduced. As a result, the amount of material to be fed into the circuit can be reduced, which has to be cooled again in each circuit and then melted again and which may have a burn-up of expensive alloy elements, this burn-up always having to be supplemented.
Dadurch, daß der Anguß verringert werden kann oder ganz entfallen kann, verringert sich die Menge erhitzten Materials und damit auch die Temperaturbelastung der Einspritzeinheit sowie der Gießform selbst, so daß kürzere Abkühlphasen möglich sind und demzufolge eine höhere Stückzahl pro Zeiteinheit herstellbar ist, so daß die Leistungsfähigkeit der Anlage verbessert wird.The fact that the sprue can be reduced or can be omitted entirely reduces the amount of heated material and thus also the temperature load on the injection unit and the mold itself, so that shorter cooling phases are possible and consequently a higher number of units per unit time can be produced, so that the performance of the system is improved.
Dadurch, daß das Material ohne einen zwischengeschalteten Einspritzkanal unmittelbar aus der Kammer in die Gießform gelangt, werden große Strömungsquerschnitte ermöglicht und ggf. können hierdurch Umlenkungen des Materialstroms vermieden werden. Das Material muß daher nicht so hoch erhitzt werden, wie um eine optimale Durchströmbarkeit vergleichsweise gerin- ger Einströmkanäle in die Gießform oder das Durchströmen langer Wege zu ermöglichen. Hierdurch kann ein niedrigeres Temperaturniveau der Schmelze eingestellt werden, so daß auch durch diese Maßnahme die Temperaturbelastung der Vorrichtung verringert wird und - wie bereits erwähnt - Abkühlzeiten ver- kürzt und die Leistungsfähigkeit der Vorrichtung gesteigert werden kann.The fact that the material passes directly from the chamber into the casting mold without an intermediate injection channel enables large flow cross sections and, if necessary, deflections of the material flow can thereby be avoided. The material therefore does not have to be heated as high as to allow for an optimal flow of comparatively small inflow channels into the mold or for long paths to flow through. In this way, a lower temperature level of the melt can be set, so that this measure also reduces the temperature load on the device and — as already mentioned — shortens cooling times and increases the performance of the device.
Dadurch, daß ggf. Umlenkungen des Materialstroms vermieden werden können, wird die Belastung der Vorrichtung verringert, da derartige Umlenkungen zu einem vorschnellen Verschleiß und regelrechten Auswaschungen führen können. Zudem verringert sich dadurch ggf. die erforderliche Antriebsleistung, da der Förderwiderstand des Materials verringert werden kann.The fact that deflections of the material flow can be avoided, the load on the device is reduced, since such deflections can lead to premature wear and proper leaching. This may also reduce the required drive power, since the material's conveying resistance can be reduced.
Dadurch, daß die Einspitzeinheit bis in die Gießform reicht und nicht ausschließlich außerhalb der Gießform angeordnet ist, ist die Vorrichtung mit kompakten Abmessungen herstellbar. Dies wird insbesondere dadurch ermöglicht, dass eine der beiden Wandungen nicht nur bis an die Gießform herangeführt werden kann, sondern bis in die Gießform führbar ist.Because the injection unit extends into the casting mold and is not arranged exclusively outside the casting mold, the device can be produced with compact dimensions. This is made possible in particular by the fact that one of the two walls can not only be brought up to the casting mold, but can also be guided into the casting mold.
Vorteilhaft kann eine der beiden beweglichen Wandungen der Kammer der Einspritzeinheit als Teil derjenigen Wandung des Formhohlraumes ausgebildet sein, welcher zum Öffnen der Form beweglich ausgestaltet ist. Auf diese Weise können komplizierte mehrachsige Bewegungen vermieden werden und es ist sichergestellt, daß beim Öffnen der Form diese in die Gießform führbare Wandung der Einspritzeinheit gemeinsam mit dem zu öffnenden Teil der Gießform bewegt wird, so daß die Zugänglichkeit zum Gußstück bei geöffneter Form unverändert beibehalten werden kann und eine optimale Zugänglichkeit zur Entnahme des Gußstückes ermöglicht.One of the two movable walls of the chamber of the injection unit can advantageously be formed as part of that wall of the mold cavity which is designed to be movable for opening the mold. In this way, complicated multi-axis movements can be avoided and it is ensures that when opening the mold this wall of the injection unit, which can be guided into the casting mold, is moved together with the part of the casting mold to be opened, so that the accessibility to the casting can be maintained unchanged when the mold is open and allows optimum accessibility for removing the casting.
Die Erfindung wird anhand eines Ausführungsbeispieles im folgenden näher erläutert. Dabei zeigen dieThe invention is explained in more detail below using an exemplary embodiment. The show
Fig. 1 bis 6 eine Vorrichtung zum Herstellen von Gußstücken in unterschiedlichen Phasen eines Gießvorganges.Fig. 1 to 6 an apparatus for producing castings in different phases of a casting process.
In Fig. 1 ist mit 1 allgemein eine Vorrichtung bezeichnet, die zumIn Fig. 1, 1 generally designates a device for
Herstellen von Gußstücken im Druckgießverfahren dient.Manufacture of castings in the die casting process is used.
Die Vorrichtung 1 weist eine zweiteilige Gießform 2 auf, die sich in Fig. 1 in ihrer geschlossenen Anordnung befindet. Weiterhin weist die Vorrichtung 1 eine Einspritzeinheit 3 auf, die dazu dient, das fließfähig eingestellte Material in die Gießform 2 einzuspritzen. In Fig. 1 ist die Einspritzeinheit 3 in einer Anfangsphase ihres Befüllvorganges dargestellt:The device 1 has a two-part mold 2, which is in its closed arrangement in FIG. 1. Furthermore, the device 1 has an injection unit 3, which serves to inject the flowable material into the mold 2. 1 shows the injection unit 3 in an initial phase of its filling process:
Eine Fördereinheit 4 fördert geschmolzenes oder zumindest teilweise geschmolzenes Material in eine Kammer 5 der Einspritzeinheit 3. Die Kammerwandungen werden durch ein rundes Rohr 6, einen Einspritzkolben 7 und einen Abdichtkolben 8 gebildet.A conveyor unit 4 conveys molten or at least partially molten material into a chamber 5 of the injection unit 3. The chamber walls are formed by a round tube 6, an injection piston 7 and a sealing piston 8.
In Fig. 1 ist das Volumen der Kammer 5 vergleichsweise klein. Das Kammervolumen kann ggf. völlig minimiert werden, indem die beiden Kolben 7 und 8 aneinandergeführt werden. In jedem Fall ist sichergestellt, daß auch oxidationsfreudiges Material problemlos verarbeitet werden kann, weil ein Kontakt mit Umgebungsluft weitgehend vermieden werden kann. Das Material wird durch die Fördereinheit 4 in die Kammer 5 gefördert und angepaßt an die Menge des zuströmenden Materials wird der Abdichtkolben 8 zunehmend vom Einspritzkolben 7 entfernt, wie Fig. 2 zeigt.In Fig. 1 the volume of the chamber 5 is comparatively small. The chamber volume can possibly be completely minimized by bringing the two pistons 7 and 8 together. In any case, it is ensured that even oxidation-friendly material can be processed without any problems, because contact with ambient air can be largely avoided. The material will conveyed by the delivery unit 4 into the chamber 5 and adapted to the amount of material flowing in, the sealing piston 8 is increasingly removed from the injection piston 7, as shown in FIG. 2.
Fig. 2 zeigt die Einspritzeinheit 3 in einer Endphase ihres Befüllvorganges, wenn die Einspritzeinheit 3 weitgehend mit dem zu vergießenden Material befüllt ist. Das Volumen der Kammer 5 hat sich entsprechend vergrößert, und der Einspritzkolben 7 be- findet sich nach wie vor in einer Stellung, in der der Zugang von der Fördereinheit 4 in die Kammer 5 geöffnet ist.Fig. 2 shows the injection unit 3 in an end phase of its filling process when the injection unit 3 is largely filled with the material to be cast. The volume of the chamber 5 has increased accordingly, and the injection piston 7 is still in a position in which the access from the delivery unit 4 into the chamber 5 is open.
Wenn die gewünschte Materialmenge in die Kammer 5 eingebracht worden ist, werden die beiden Kolben 7 und 8 gemein- sam bewegt. Hierdurch wird - wie aus Fig. 3 ersichtlich ist - dieWhen the desired amount of material has been introduced into the chamber 5, the two pistons 7 and 8 are moved together. As a result, as can be seen from FIG. 3, the
Kammer 5 gegenüber der Fördereinheit 4 abgeschlossen.Chamber 5 closed opposite the delivery unit 4.
Der Abdichtkolben 8 wird aus dem Rohr 6 herausgeführt und bis in die Form 2 geführt. Hierdurch wird das Rohr 6 und damit die Kammer 5 geöffnet. Eine weitere Bewegung des Einspritzkolbens 7 bewirkt, daß das Material aus der Kammer 5 in die Gießform 2 eingespritzt wird.The sealing piston 8 is led out of the tube 6 and into the form 2. This opens the tube 6 and thus the chamber 5. A further movement of the injection piston 7 causes the material from the chamber 5 to be injected into the mold 2.
Die Endstellung des Einspritzkolbens 7 ist aus Fig. 4 ersichtlich. Der Abdichtkolben 8 befindet sich innerhalb der Gießform 2 in einer Stellung, in der er einen Teil der Wandung der Gießform 2 bildet, welcher einen Formhohlraum 9 begrenzt, der die spätere Kontur des Gußstückes bestimmt. Bei dem dargestellten Ausführungsbeispiel handelt es sich um ein Gußstück, z. B. um ein rotationssymmetrisches Bauteil wie ein Rad, einen Deckel od. dgl., an dessen Formgebung der Abdichtkolben 8 direkt beteiligt ist und dementsprechend konturiert sein kann, um den gewünschten Oberflächenverlauf des Gußstücks zu bestimmen. In diesem Fall ist der Angußpunkt in das Gußstück verlagert, so daß vorteilhaft ein „Anguß" im herkömmlichen Sinn, also ein Teil, welches vom Gußstück entfernt werden muß und lediglich als Kreislaufmaterial verwendet werden kann, entfällt.The end position of the injection piston 7 can be seen from FIG. 4. The sealing piston 8 is located within the casting mold 2 in a position in which it forms part of the wall of the casting mold 2, which delimits a mold cavity 9 which determines the later contour of the casting. In the illustrated embodiment, it is a casting, for. B. a rotationally symmetrical component such as a wheel, a cover or the like., In the shaping of the sealing piston 8 is directly involved and can be contoured accordingly to determine the desired surface profile of the casting. In this case, the sprue point is shifted into the casting, so that advantageously a "sprue" in the conventional sense, that is to say a part, which has to be removed from the casting and can only be used as a recycle material is eliminated.
Alternativ kann vorgesehen sein, daß ein oder mehrere einzelne Endprodukte radial um den Bereich der beiden Kolben 7 und 8 herum angeordnet sind, so daß das hergestellte Gußstück einerseits diese Anzahl der Produkte umfaßt sowie einen Anguß, der sich vom Bereich zwischen den Kolben 7 und 8 bis zu diesen Produkten erstreckt. Der Anguß ist also minimal ausgebildet und weist keine Bestandteile auf, die aus der eigentlichen Gießform 2 herausführen. In diesem Fall kann der Einspritzkolben 7 weiter als in Fig. 3 dargestellt geführt werden, um die Materialstärke des Angusses möglichst klein zu halten.Alternatively, it can be provided that one or more individual end products are arranged radially around the area of the two pistons 7 and 8, so that the casting produced comprises on the one hand this number of products and a sprue which extends from the area between the pistons 7 and 8 extends to these products. The sprue is therefore minimal and has no components that lead out of the actual casting mold 2. In this case, the injection piston 7 can be guided further than shown in FIG. 3 in order to keep the material thickness of the sprue as small as possible.
Aus Fig. 5 ist ersichtlich, daß die Gießform 2 geöffnet ist. Hierzu besteht die Gießform 2 aus einem ortsfesten Formteil 10 und einem demgegenüber beweglichen Formteil 11. Der Abdichtkolben 8 ist innerhalb des beweglichen Formteiles 11 gelagert und gemeinsam oder getrennt mit dem beweglichen Formteil 11 be- weglich, so daß nach Öffnung der Gießform 2 die Entnahme des5 that the mold 2 is open. For this purpose, the casting mold 2 consists of a stationary molded part 10 and a mold part 11 which is movable relative thereto. The sealing piston 8 is mounted within the movable mold part 11 and can be moved together or separately with the movable mold part 11, so that after opening the mold 2 the removal of the
Gußstückes ungehindert mit der gleichguten Zugänglichkeit erfolgen kann wie bei einer herkömmlichen Einspritzeinheit, bei der sämtliche Komponenten außerhalb der Gießform 2 angeordnet sind.Casting can take place unhindered with the same good accessibility as in a conventional injection unit, in which all components are arranged outside the mold 2.
Nach Entnahme des Gußstückes kann das bewegliche Formteil 11 wieder an das ortsfeste Formteil 10 der Gießform herangeführt werden. Hierdurch wird auch der Abdichtkolben 8 wieder an den in seiner Endstellung verbliebenen Einspritzkolben 7 ge- führt. Rein schematisch ist in Fig. 6 dargestellt, daß der Abdichtkolben 8 vorzugsweise an den Einspritzkolben 7 herangeführt wird, um ein minimales Volumen der Kammer 5 zu ermöglichen, bevor die Gießform 2 vollständig geschlossen ist. Auf diese Weise kann problemlos das Entweichen der Umgebungsatmo- Sphäre ermöglicht werden, so daß die Kammer 5 mit minimalemAfter removal of the casting, the movable molded part 11 can be brought back to the fixed molded part 10 of the casting mold. As a result, the sealing piston 8 is again guided to the injection piston 7 remaining in its end position. 6 that the sealing piston 8 is preferably brought up to the injection piston 7 in order to enable a minimal volume of the chamber 5 before the mold 2 is completely closed. In this way, the escape of the ambient atmosphere can be easily made, so that the chamber 5 with minimal
Kammervolumen eingestellt wird. Lediglich aus Sicherheitsgrün- den, um mechanische Beschädigungen der Kolben 7 und 8 zu vermeiden, ist bei der dargestellten Kolbensteuerung vorgesehen, die Kolben 7 und 8 nicht direkt aneinander anliegen zu lassen.Chamber volume is set. For safety reasons only In order to avoid mechanical damage to the pistons 7 and 8, the piston control shown does not allow the pistons 7 and 8 to rest directly against one another.
Ausgehend von dem Zustand nach Fig. 6 wird die Gießform 2 geschlossen, d. h. der bewegliche Formteil 11 wird vollständig an den ortsfesten Formteil 10 herangeführt und anschließend werden die Spannplatten der Gießform 2 zur Aufnahme der Ein- spritzdrücke verriegelt.Starting from the state shown in FIG. 6, the mold 2 is closed, i. H. the movable molded part 11 is completely brought up to the fixed molded part 10 and then the clamping plates of the casting mold 2 are locked in order to absorb the injection pressures.
Ein Vorteil einer erfindungsgemäßen Vorrichtung liegt darin, daß sich der Abdichtkolben 8 beim Einspritzvorgang an dem beweglichen Formteil 11 abstützen kann, so daß kosten- und konstruk- tionsmäßig vorteilhaft keine eigene Abstützung für den Abdichtkolben 8 vorgesehen sein muß, da die auf den Abdichtkolben 8 wirkenden Einspritzdrücke von der Gießform 2 bzw. von deren Spannplatten aufgenommen werden.An advantage of a device according to the invention is that the sealing piston 8 can be supported on the movable molded part 11 during the injection process, so that there is no need for a separate support for the sealing piston 8 in terms of cost and construction, since those acting on the sealing piston 8 Injection pressures are taken from the mold 2 or from the clamping plates.
Anschließend an die Situation nach Fig. 6 und nachdem dieFollowing the situation of Fig. 6 and after the
Gießform 2 geschlossen wurde, wird die Kammer 5 durch eine gleichsinnige und gleichschnelle Bewegung der beiden Kolben 7 und 8 verschoben, bis sich die Kammer 5 vor der Öffnung der Fördereinheit 4 befindet, so daß ein neuer Arbeitszyklus erfolgen kann. Casting mold 2 has been closed, the chamber 5 is displaced by a movement of the two pistons 7 and 8 in the same direction and at the same speed until the chamber 5 is in front of the opening of the conveyor unit 4, so that a new working cycle can take place.

Claims

Patentansprüche: claims:
1. Vorrichtung zum Herstellen von Gußstücken aus fließ- oder streufähigem Vormaterial, mit einer Einspritzeinheit, aus der das zumindest teilweise verflüssigte Material in eine Gießform einspritzbar ist, wobei die Einspritzeinheit eine Einlaßöffnung zur Zufuhr des Materials aufweist, und wobei die Einspritzeinheit eine Kammer mit zwei be- weglichen Wandungen aufweist, die wahlweise entweder in einer Richtung gemeinsam beweglich sind oder gegenläufig beweglich sind, derart, daß der Innenraum der Kammer wahlweise volumenveränderlich ist und/oder verschiebbar ist, wobei eine der beiden Wandungen einen Teil der den1. Device for producing castings from flowable or scatterable primary material, with an injection unit, from which the at least partially liquefied material can be injected into a mold, the injection unit having an inlet opening for supplying the material, and wherein the injection unit has a chamber with two has movable walls, which are either either jointly movable in one direction or are movable in opposite directions, such that the interior of the chamber is optionally variable in volume and / or displaceable, one of the two walls being a part of the
Formhohlraum (9) begrenzenden Wandung bildet, dadurch gekennzeichnet, daß beide Wandungen jeweils einen Teil der den Formhohlraum (9) begrenzenden Wandung bilden, wobei eine der beiden Wandungen bis in die Gießform (2) führbar ist.Forming the cavity (9) bounding wall, characterized in that both walls each form part of the wall defining the cavity (9), wherein one of the two walls can be guided into the mold (2).
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet daß die in die Gießform (2) führbare Wandung als Kolben (δ)-ausgebildet ist, der in einer rohrartigen Kammerwandung längsverfahrbar gelagert ist bzw. an die Kammer (5) abdichtend heranführbar gelagert ist und daß diese Wandung gemeinsam mit einem beweglichen Formteil (11) der Gießform (2) beweglich ist.2. Apparatus according to claim 1, characterized in that the wall into the casting mold (2) can be guided as a piston (δ) - which is mounted so as to be longitudinally displaceable in a tubular chamber wall or is sealingly mounted to the chamber (5) and that this wall is movable together with a movable molded part (11) of the casting mold (2).
Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die in die Gießform (2) führbare Wandung den Oberflächenverlauf des Gußstückes mitbestimmend konturiert ist. Apparatus according to claim 1, characterized in that the wall which can be guided into the casting mold (2) is also contoured to determine the surface course of the casting.
PCT/DE2001/002486 2000-07-07 2001-06-30 Device for producing castings that comprises a wall which can be guided into the casting mold WO2002004147A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2002508591A JP2004502549A (en) 2000-07-07 2001-06-30 Apparatus for producing castings with walls guideable in a mold
EP01953863A EP1301301A1 (en) 2000-07-07 2001-06-30 Device for producing castings that comprises a wall of an injection casting chamber, which can be guided into the casting mold
KR1020027003013A KR20020064281A (en) 2000-07-07 2001-06-30 Device for producing castings that comprises a wall which can be guided into the casting mold
BR0106937-3A BR0106937A (en) 2000-07-07 2001-06-30 Device for the production of casting parts consisting of a wall that can be guided into the casting mold

Applications Claiming Priority (2)

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DE10033166.1 2000-07-07
DE10033166A DE10033166A1 (en) 2000-07-07 2000-07-07 Device for producing castings, with a wall that can be guided into the casting mold

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US7216690B2 (en) * 2004-06-17 2007-05-15 Ut-Battelle Llc Method and apparatus for semi-solid material processing
US7897046B2 (en) * 2006-01-25 2011-03-01 Baldwin Filters, Inc. Fluid filter
JP5729239B2 (en) * 2011-09-28 2015-06-03 宇部興産機械株式会社 Injection molding apparatus and injection molding method
KR102445096B1 (en) 2022-04-06 2022-09-20 주식회사 처음부터재테크 Disk ejector to upgrade your computer's performance
CN116851700B (en) * 2023-07-06 2024-04-05 东莞市铭能五金有限公司 Aluminum alloy die-casting structural component forming die

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CH661883A5 (en) * 1982-10-20 1987-08-31 Inst Po Metalloznanie I Tekno Submerged-plunger (hot-chamber piston) die-casting method and a machine for carrying out the method
FR2665654A1 (en) * 1990-08-09 1992-02-14 Armines Machine for die- (pressure-) casting a metal alloy in the thixotropic state
CH690753A5 (en) * 1996-10-29 2001-01-15 Buehler Ag Patentabteilung Assembly for working thixotropic materials has a number of workstations with a conveyor system including an electromagnetic stirrer and an ejector for the metal portions

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KR20020064281A (en) 2002-08-07
DE10033166A1 (en) 2002-01-24
EP1301301A1 (en) 2003-04-16
BR0106937A (en) 2002-05-14
US20030173053A1 (en) 2003-09-18
JP2004502549A (en) 2004-01-29

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