EP0037125A1 - Arrangement for die casting metals and alloys - Google Patents

Arrangement for die casting metals and alloys Download PDF

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Publication number
EP0037125A1
EP0037125A1 EP81102472A EP81102472A EP0037125A1 EP 0037125 A1 EP0037125 A1 EP 0037125A1 EP 81102472 A EP81102472 A EP 81102472A EP 81102472 A EP81102472 A EP 81102472A EP 0037125 A1 EP0037125 A1 EP 0037125A1
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EP
European Patent Office
Prior art keywords
press
gas
chamber
cavity
die
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Granted
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EP81102472A
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German (de)
French (fr)
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EP0037125B1 (en
Inventor
Stantscho Christov Dipl.-Ing. Vutov
Raschko Rajkov Dipl.-Ing. Slavov
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INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
Institute po Metaloznanie i Technologia na Metalite
Original Assignee
INSTITUT PO METALOSNANIE I TECHNOLOGIA NA METALITE
Institute po Metaloznanie i Technologia na Metalite
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Priority to AT81102472T priority Critical patent/ATE4967T1/en
Publication of EP0037125A1 publication Critical patent/EP0037125A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/06—Air injection machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging

Definitions

  • the invention relates to a device for the press casting of metals and alloys using an increased gas pressure above the solidifying melt, consisting of a hydraulic press with a press cylinder, a piston which divides the cylinder into two spaces which are connected to the hydraulic system of the press , and with a piston rod to which a press plate and a press mold are fastened, wherein at least one gas collection cavity is formed in the press mold and is connected to a gas container by shut-off elements.
  • the press mold is connected to a press piston by means of a pneumatic piston which is arranged in a pneumatic cylinder, the compression space in front of the pneumatic piston being connected to the press mold cavities, to which compressed gas is supplied by gas lines and at least one adjustable check valve is supplied, which opens in the direction from the compression space in front of the pneumatic piston to the mold cavities (Bulg. Pat. No. 21 077).
  • This device has the disadvantage that the usable stroke is shortened due to the installation of an additional element, namely a pneumatic cylinder with piston between the plunger and the die, that the die is unsafe during operation due to its movable connection with the plunger and that the mold must first be closed before the gas can be compressed.
  • Vorrich- un t g is provided with an independent hydro-pneumatic multi p l ikator, which is arranged in the plunger and by means of respective shut-off elements h older with a Gasbe- and is connected to the die cavity.
  • the multiplier is operated on a special command to increase the pressure of the gas in the mold cavity to the required value.
  • This device has the disadvantage that it very compli - is built ert zi and does not permit the application of a high gas pressure immediately after closing the mold.
  • the invention has for its object to design the device of the type mentioned so that the compression of the gas take place automatically during the empty stroke of the press and a high gas pressure can be exerted on the solidifying melt immediately after closing the mold.
  • a chamber is formed in the piston rod, which is filled to a certain level with operating fluid from the hydraulic system of the press.
  • the lower part of this chamber is with the space of the press cylinder connected below the piston. This space is in turn connected to the hydraulic system of the press via a shut-off element.
  • the upper part of the chamber is connected to the gas container via a check valve and to the mold cavity via a shut-off valve.
  • the mold cavity is in turn connected to the atmosphere via another shut-off valve.
  • the device according to the invention has the advantage that the development of systems for compressing the gas in each mold is eliminated and a maximum gas pressure can be exerted immediately after the mold is closed.
  • a movable partition can advantageously be arranged in the chamber between the operating liquid and the gas.
  • the device consists of a press cylinder 1 with a press piston 2 arranged therein, which has a piston rod 3. On the piston rod 3, a press plate 14 and a die 15 are attached. The piston 2 and the cylinder 1 are sealed from one another by means of ring-shaped sealing elements 6. The piston rod 3 and the cylinder 1 are sealed by sealing elements 12.
  • the space 4 above the piston 2 is connected to the hydraulic system of the press by means of a pipeline 5.
  • the space 8 of the press cylinder 1 below the Piston 2 is connected to the hydraulic system of the press via a shut-off element 10.
  • a chamber 9 is formed, which to a certain level st._ with operating liquid 13 from the hydraulic system of the press is filled i
  • the rest of the chamber 9 is filled with gas 24th
  • the lower part of the chamber 9 is connected via a pipe 11 and a channel 7 to the space 8 below the piston 2.
  • the upper part of the chamber 9 is connected via a pipe 23 at the same time via a check valve 21 to the gas container 22, via a shut-off valve 18 to the cavity 16 of the mold 15 and via an adjustable check valve 19 to the atmosphere.
  • the cavity 16 of the die 15 is in turn connected to the atmosphere via a shut-off valve 17.
  • the chamber 9 is connected to a manometer 20 for checking the gas pressure.
  • valve 18 After solidification of the pressed part in the mold the valve 18 closed.
  • the valve 17 for releasing the gas remaining in the die into the atmosphere is opened.
  • a command is given for the backward stroke of the plunger, ie the pressure in chamber 4 is reduced by connecting pipe 5 to the press container.
  • the piston, together with the die 15 moves upwards under the action of the pressure of the gas in the chamber 9, the operating liquid 13 running back into the space 8 below the piston.
  • the piston 2 After the pressure in the chamber 9 and in the gas container 22 has been equalized, the piston 2 moves further downward, an additional quantity of gas flowing from the gas container 22 through the check valve 21 into the chamber 9, as a result of which the device returns to the starting position.
  • the device according to the invention operates as a normal hydraulic press.
  • a movable partition 25 is arranged in the chamber 9 between the operating liquid 13 and the gas 24, which is designed as a floating piston which is sealed to the wall of the chamber 9 by means of annular sealing elements 26. In this way, direct contact between gas and operating fluid is avoided and the risk of possible interaction is eliminated.
  • the movable partition is designed as an elastic membrane 27 which is fixedly attached to the chamber 9.

Abstract

The invention relates to an apparatus for pressure die casting of metals and alloys involving the action of increased gas pressure on the solidifying melt. In this apparatus, the gas is pressurized automatically during the stroke of the press and pressurized gas at elevated pressure is applied to molten metal in the die cavity immediately after the closing of the die. For this purpose, the apparatus comprises a hydraulic press including a cylinder and a piston slidably mounted therein, which piston divides the cylinder into a first and second chamber. The first chamber is in communication with a source of pressurized liquid and the second chamber is in communication with a gas retaining cavity disposed in the piston rod of the piston. A press plate and die having at least one die cavity is rigidly mounted on the piston rod. The cavity of the die is connected by means of corresponding valves to a supply reservoir with gas under low pressure. The gas retaining cavity within the piston rod is filled up to a fixed level with working liquid from the hydraulic system of the press. The bottom part of this cavity is connected to the second chamber of the pressing cylinder below the piston. This second chamber is connected to the hydraulic system of the press by means of a valve. The upper part of the gas retaining cavity is connected simultaneously by means of a check valve to a supply reservoir for gas and by means of a shut-off valve to the die cavity. The die cavity is connected by means of another shut-off valve to the atmosphere.

Description

Die Erfindung betrifft eine Vorrichtung zum Preßgießen von Metallen und Legierungen unter Anwendung eines erhöhten Gasdrucks über der erstarrenden Schmelze, bestehend aus einer hydraulischen Presse mit einem Preßzylinder, einem Kolben, der den Zylinder in zwei Räume teilt, die mit dem hydraulischen System der Presse verbunden sind, und mit einer Kolbenstange, an der eine Preßplatte und eine Preßform befestigt sind, wobei in der Preßform mindestens ein Gassammelhohlraum ausgebildet ist, der durch Absperrelemente mit einem Gasbehälter verbunden ist.The invention relates to a device for the press casting of metals and alloys using an increased gas pressure above the solidifying melt, consisting of a hydraulic press with a press cylinder, a piston which divides the cylinder into two spaces which are connected to the hydraulic system of the press , and with a piston rod to which a press plate and a press mold are fastened, wherein at least one gas collection cavity is formed in the press mold and is connected to a gas container by shut-off elements.

Bei einer bekannten Vorrichtung zum Preßgießen von Metallen und Legierungen ist die Preßform mit einem Preßkolben mittels eines pneumatischen Kolbens verbunden, welcher in einem pneumatischen Zylinder angeordnet ist, wobei der Kompressionsraum vor dem pneumatischen Kolben mit den Preßformhohlräumen verbunden ist, denen Druckgas durch Gasleitungen und mindestens ein regulierbares Rückschlagventil zugeführt wird, das sich in Richtung von dem Kompressionsraum vor dem pneumatischen Kolben zu den Preßformhohlräumen hin öffnet (Bulg. Pat. Nr. 21 077). Diese Vorrichtung hat den Nachteil, daß der nutzbare Hub infolge des Einbaus eines zusätzlichen Elements, nämlich eines pneumatischen Zylinders mit Kolben zwischen dem Preßkolben und der Preßform, verkürzt wird, daß die Preßform während des Betriebs infolge ihrer beweglichen Verbindung mit dem Preßkolben unsicher geführt ist und daß die Preßform zuerst geschlossen werden muß, ehe das Gas komprimiert werden kann.In a known device for the press casting of metals and alloys, the press mold is connected to a press piston by means of a pneumatic piston which is arranged in a pneumatic cylinder, the compression space in front of the pneumatic piston being connected to the press mold cavities, to which compressed gas is supplied by gas lines and at least one adjustable check valve is supplied, which opens in the direction from the compression space in front of the pneumatic piston to the mold cavities (Bulg. Pat. No. 21 077). This device has the disadvantage that the usable stroke is shortened due to the installation of an additional element, namely a pneumatic cylinder with piston between the plunger and the die, that the die is unsafe during operation due to its movable connection with the plunger and that the mold must first be closed before the gas can be compressed.

Eine andere bekannte Vorrichtung zum Preßgießen unter Anwendung eines erhöhten Gasdrucks hat eine spezialisierte hydraulische Presse mit separaten Einrichtungen für das Schließen der Preßform und für das Pressen. Die Vorrich- tung ist mit einem unabhängigen hydro-pneumatischen Multi- plikator versehen, der im Preßkolben angeordnet ist und mittels entsprechender Absperrelemente mit einem Gasbe- hälter und mit dem Preßformhohlraum verbunden ist. Nach dem Schließen der Preßform erfolgt auf besonderen Befehl das Betätigen des Multiplikators zur Erhöhung des Drucks des Gases im Preßformhohlraum bis auf den erforderlichen Wert.Another known device for die casting using an increased gas pressure has a specialized hydraulic press with separate devices for closing the die and for pressing. The Vorrich- un t g is provided with an independent hydro-pneumatic multi p l ikator, which is arranged in the plunger and by means of respective shut-off elements h older with a Gasbe- and is connected to the die cavity. After the mold has been closed, the multiplier is operated on a special command to increase the pressure of the gas in the mold cavity to the required value.

Diese Vorrichtung hat den Nachteil, daß sie sehr kompli- ziert gebaut ist und die Anwendung eines hohen Gasdrucks unmittelbar nach dem Schließen der Preßform nicht zuläßt.This device has the disadvantage that it very compli - is built ert zi and does not permit the application of a high gas pressure immediately after closing the mold.

Der Erfindung liegt die Aufgabe zugrunde, die Vorrichtung der eingangs genannten Art so auszubilden, daß das Komprimieren des Gases automatisch während des Leerhubs der Presse erfolgen und ein hoher Gasdruck auf die erstarrende Schmelze unmittelbar nach dem Schließen der Preßform ausgeübt werden kann.The invention has for its object to design the device of the type mentioned so that the compression of the gas take place automatically during the empty stroke of the press and a high gas pressure can be exerted on the solidifying melt immediately after closing the mold.

Diese Aufgabe wird bei der Vorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß in der Kolbenstange eine Kammer ausgebildet ist, die bis zu einem bestimmten Niveau mit Betriebsflüssigkeit vom hydraulischen System der Presse gefüllt ist. Der untere Teil dieser Kammer ist mit dem Raum des Preßzylinders unterhalb des Kolbens verbunden. Dieser Raum ist seinerseits mit dem hydraulischen System der Presse über ein Absperrelement verbunden. Der obere Teil der Kammer ist gleichzeitig über ein.Rückschlagventil mit dem Gasbehälter und über ein Absperrventil mit dem Preßformhohlraum verbunden. Der Preßformhohlraum ist seinerseits über ein anderes Absperrventil mit der Atmosphäre verbunden.This object is achieved in the device of the type mentioned in the invention in that a chamber is formed in the piston rod, which is filled to a certain level with operating fluid from the hydraulic system of the press. The lower part of this chamber is with the space of the press cylinder connected below the piston. This space is in turn connected to the hydraulic system of the press via a shut-off element. The upper part of the chamber is connected to the gas container via a check valve and to the mold cavity via a shut-off valve. The mold cavity is in turn connected to the atmosphere via another shut-off valve.

Die erfindungsgemäße Vorrichtung hat den Vorteil, daß die Entwicklung von Systemen für das Komprimieren des Gases in jeder Preßform entfällt und ein maximaler Gasdruck unmittelbar nach dem Schließen der Preßform ausgeübt werden kann.The device according to the invention has the advantage that the development of systems for compressing the gas in each mold is eliminated and a maximum gas pressure can be exerted immediately after the mold is closed.

Vorteilhafterweise kann zwischen der Betriebsflüssigkeit und dem Gas in der Kammer eine bewegliche Trennwand angeordnet sein.A movable partition can advantageously be arranged in the chamber between the operating liquid and the gas.

Anhand der Zeichnungen wird die Erfindung beispielsweise näher erläutert. Es zeigen:

  • Fig. 1 eine erste Ausführungsform der Vorrichtung im Längsschnitt;
  • Fig. 2 und
  • Fig. 3 in Längsschnitten eine zweite und dritte Ausführungsform der Vorrichtung.
The invention is explained in more detail, for example, with reference to the drawings. Show it:
  • Figure 1 shows a first embodiment of the device in longitudinal section.
  • Fig. 2 and
  • Fig. 3 in longitudinal sections a second and third embodiment of the device.

Die Vorrichtung besteht aus einem Preßzylinder 1 mit einem darin angeordneten Preßkolben 2, der eine Kolbenstange 3 hat. An der Kolbenstange 3 sind eine Preßplatte 14 und eine Preßform 15 befestigt. Der Kolben 2 und der Zylinder 1 sind untereinander mittels ringförmiger Dichtungselemente 6 abgedichtet. Die Kolbenstange 3 und der Zylinder 1 sind durch Dichtungselemente 12 abgedichtet.The device consists of a press cylinder 1 with a press piston 2 arranged therein, which has a piston rod 3. On the piston rod 3, a press plate 14 and a die 15 are attached. The piston 2 and the cylinder 1 are sealed from one another by means of ring-shaped sealing elements 6. The piston rod 3 and the cylinder 1 are sealed by sealing elements 12.

Der Raum 4 oberhalb des Kolbens 2 ist mittels einer Rohrleitung 5 mit dem hydraulischen System der Presse verbunden. Der Raum 8 des Preßzylinders 1 unterhalb des Kolbens 2 ist über ein Absperrelement 10 mit dem hydraulischen System der Presse verbunden. In der Kolbenstange 3 ist eine Kammer 9 ausgebildet, die bis zu einem bestimmten Niveau mit Betriebsflüssigkeit 13 aus dem hydraulischen System der Presse gefüllt ist._ Der übrige Teil der Kammer 9 ist mit Gas 24 gefüllt. Der untere Teil der Kammer 9 ist über ein Rohr 11 und einen Kanal 7 mit dem Raum 8 unterhalb des Kolbens 2 verbunden. Der obere Teil der Kammer 9 ist über ein Rohr 23 gleichzeitig über ein Rückschlagventil 21 mit dem Gasbehälter 22, über ein Absperrventil 18 mit dem Hohlraum 16 der Preßform 15 und über ein regulierbares Rückschlagventil 19 mit der Atmosphäre verbunden. Der Hohlraum 16 der Preßform 15 ist seinerseits über ein Absperrventil 17 mit der Atmosphäre verbunden. Die Kammer 9 ist mit einem Manometer 20 für die Kontrolle des Gasdrucks verbunden.The space 4 above the piston 2 is connected to the hydraulic system of the press by means of a pipeline 5. The space 8 of the press cylinder 1 below the Piston 2 is connected to the hydraulic system of the press via a shut-off element 10. In the piston rod 3, a chamber 9 is formed, which to a certain level st._ with operating liquid 13 from the hydraulic system of the press is filled i The rest of the chamber 9 is filled with gas 24th The lower part of the chamber 9 is connected via a pipe 11 and a channel 7 to the space 8 below the piston 2. The upper part of the chamber 9 is connected via a pipe 23 at the same time via a check valve 21 to the gas container 22, via a shut-off valve 18 to the cavity 16 of the mold 15 and via an adjustable check valve 19 to the atmosphere. The cavity 16 of the die 15 is in turn connected to the atmosphere via a shut-off valve 17. The chamber 9 is connected to a manometer 20 for checking the gas pressure.

Die Vorrichtung arbeitet folgendermaßen:

  • In der Ausgangsstellung sind das Absperrelement 10 und die Absperrventile 17 und 18 geschlossen. Nach dem Erzeugen eines Drucks im Raum 4 des Zylinders 1 beginnt die Abwärtsbewegung des Kolbens 2, wobei die Betriebsflüssigkeit von Raum 8 unterhalb des Kolbens durch den Kanal 7 und das Rohr 11 in die Kammer 9 gefördert wird, wodurch eine Verminderung des Volumens bzw. eine Erhöhung des Drucks des dort befindlichen Gases 24 hervorgerufen wird. Dieser Vorgang dauert fort,bis der Druck in der Kammer 9 und im Raum 8 unterhalb des Kolbens den durch die Einstellung des regulierbaren Rückschlagventils 19 bestimmten Wert erreicht. Bei der weiteren Abwärtsbewegung des Kolbens 2 wird der Druck nicht erhöht, da ein Teil des Gases 24 durch das Sicherheitsventil 19 in die Atmosphäre ausgelassen wird. Nach dem Schließen der Preßform wird durch Öffnen des Absperrventils 18 Druckgas in den Hohlraum 16 eingeführt.
The device works as follows:
  • In the starting position, the shut-off element 10 and the shut-off valves 17 and 18 are closed. After a pressure has been generated in the chamber 4 of the cylinder 1, the piston 2 begins to move downwards, the operating fluid being conveyed from the chamber 8 below the piston through the channel 7 and the pipe 11 into the chamber 9, thereby reducing the volume or Increasing the pressure of the gas 24 located there is caused. This process continues until the pressure in the chamber 9 and in the space 8 below the piston reaches the value determined by the adjustment of the adjustable check valve 19. During the further downward movement of the piston 2, the pressure is not increased, since part of the gas 24 is released into the atmosphere through the safety valve 19. After the mold has been closed, compressed gas is introduced into the cavity 16 by opening the shut-off valve 18.

Nach dem Erstarren des Preßteils in der Preßform wird das Ventil 18 geschlossen. Das Ventil 17 für das Auslassen des in der Preßform übriggebliebenen Gases in die Atmosphäre wird geöffnet. Es wird ein Befehl für den Rückwärtshub des Preßkolbens gegeben, d.h. der Druck im Raum 4 wird abgebaut, indem die Rohrleitung 5 mit dem Behälter der Presse verbunden wird. Zuerst bewegt sich der Kolben zusammen mit der Preßform 15 aufwärts unter der Wirkung des Drucks des Gases in der Kammer 9, wobei die Betriebsflüssigkeit 13 zurück in den Raum 8 unterhalb des Kolbens läuft. Nach dem Ausgleich des Drucks in der Kammer 9 und im Gasbehälter 22 erfolgt die weitere Abwärtsbewegung des Kolbens 2, wobei eine zusätzliche Gasmenge vom Gasbehälter 22 durch das Rückschlagventil 21 in die Kammer 9 strömt, wodurch die Vorrichtung in die Ausgangsstellung zurückkommt.After solidification of the pressed part in the mold the valve 18 closed. The valve 17 for releasing the gas remaining in the die into the atmosphere is opened. A command is given for the backward stroke of the plunger, ie the pressure in chamber 4 is reduced by connecting pipe 5 to the press container. First, the piston, together with the die 15, moves upwards under the action of the pressure of the gas in the chamber 9, the operating liquid 13 running back into the space 8 below the piston. After the pressure in the chamber 9 and in the gas container 22 has been equalized, the piston 2 moves further downward, an additional quantity of gas flowing from the gas container 22 through the check valve 21 into the chamber 9, as a result of which the device returns to the starting position.

Wenn das Absperrelement 10 geöffnet und die Verbindung zwischen der Kammer 9 und dem Gasbehälter 22 unterbrochen wird, arbeitet die erfindungsgemäße Vorrichtung als normale hydraulische Presse.When the shut-off element 10 is opened and the connection between the chamber 9 and the gas container 22 is interrupted, the device according to the invention operates as a normal hydraulic press.

Bei der zweiten Ausführungsform von Fig. 2 ist in der Kammer 9 zwischen der Betriebsflüssigkeit 13 und dem Gas 24 eine bewegliche Trennwand 25 angeordnet, die als schwebender Kolben ausgeführt ist, der an der Wand der Kammer 9 mittels ringförmiger Dichtungselemente 26 abgedichtet ist. Auf diese Weise wird der direkte Kontakt zwischen Gas und Betriebsflüssigkeit vermieden und die Gefahr einer eventuellen Wechselwirkung beseitigt.In the second embodiment of Fig. 2, a movable partition 25 is arranged in the chamber 9 between the operating liquid 13 and the gas 24, which is designed as a floating piston which is sealed to the wall of the chamber 9 by means of annular sealing elements 26. In this way, direct contact between gas and operating fluid is avoided and the risk of possible interaction is eliminated.

In der dritten Ausführungsform von Fig. 3 ist die bewegliche Trennwand als eine elastische Membrane 27 ausgeführt, die fest an der Kammer 9 befestigt ist.In the third embodiment of Fig. 3, the movable partition is designed as an elastic membrane 27 which is fixedly attached to the chamber 9.

Claims (2)

1. Vorrichtung zum Preßgießen von Metallen und Legierungen unter Anwendung eines erhöhten Gasdrucks über der erstarrenden Schmelze, bestehend aus einer hydraulischen Presse mit einem Preßzylinder, einem Kolben, der den Zylinder in zwei Räume teilt, die mit dem hydraulischen System der Presse verbunden sind, und mit einer Kolbenstange, an der eine Preßplatte und eine Preßform befestigt sind, wobei in der Preßform mindestens ein Gassammelhohlraum ausgebildet ist, der durch Absperrelemente mit einem Gasbehälter verbunden ist, dadurch gekennzeichnet, daß in der Kolbenstange (3) eine Kammer (9) ausgebildet ist, die bis zu einem bestimmten Niveau mit Betriebsflüssigkeit (13) gefüllt ist, während der untere Teil der Kammer mit dem Raum (8) unterhalb des Preßkolbens verbunden ist, wobei dieser Raum über ein Absperrelement (10) mit dem hydraulischen System der Presse verbunden ist, während der obere Teil der Kammer (9) gleichzeitig über ein Rückschlagventil (21) mit dem Gasbehälter (22) und über ein Absperrventil-(18) mit dem Hohlraum (16) der Preßform (15) und der Hohlraum (16) über ein Absperrventil (17) mit der Atmosphäre verbunden ist.1. Device for the press casting of metals and alloys using an increased gas pressure over the solidifying melt, consisting of a hydraulic press with a press cylinder, a piston which divides the cylinder into two spaces, which are connected to the hydraulic system of the press, and with a piston rod to which a press plate and a press mold are fastened, at least one gas collection cavity being formed in the press mold and being connected to a gas container by shut-off elements, characterized in that a chamber (9) is formed in the piston rod (3) which is filled to a certain level with operating fluid (13), while the lower part of the chamber is connected to the space (8) below the plunger, this space being connected via a shut-off element (10) to the hydraulic system of the press , while the upper part of the chamber (9) at the same time via a check valve (21) with the gas container (22) and practice r a shut-off valve (18) with the cavity (16) of the mold (15) and the cavity (16) via a shut-off valve (17) is connected to the atmosphere. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß zwischen der Betriebsflüssigkeit (13) und dem Gas (24) in der Kammer (9) eine bewegliche Trennwand (25) angeordnet ist.2. Device according to claim 1, characterized in that a movable partition (25) is arranged between the operating liquid (13) and the gas (24) in the chamber (9).
EP81102472A 1980-04-02 1981-04-01 Arrangement for die casting metals and alloys Expired EP0037125B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102472T ATE4967T1 (en) 1980-04-02 1981-04-01 DEVICE FOR PRESSURE CASTING OF METALS AND ALLOYS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG47207/80 1980-04-02
BG8047207A BG31832A1 (en) 1980-04-02 1980-04-02 Method for liquid or semi- liquid stamping

Publications (2)

Publication Number Publication Date
EP0037125A1 true EP0037125A1 (en) 1981-10-07
EP0037125B1 EP0037125B1 (en) 1983-10-12

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EP81102472A Expired EP0037125B1 (en) 1980-04-02 1981-04-01 Arrangement for die casting metals and alloys

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US (1) US4393916A (en)
EP (1) EP0037125B1 (en)
JP (1) JPS5717365A (en)
AT (1) ATE4967T1 (en)
BG (1) BG31832A1 (en)
CS (1) CS231982B2 (en)
DD (1) DD160894A5 (en)
DE (1) DE3161158D1 (en)
IN (1) IN154994B (en)
SU (1) SU1150054A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535231A1 (en) * 1982-10-27 1984-05-04 Inst Po Metalloznanie I Tekno Pneumatic piston method for casting metals and other materials, and equipment for carrying out the said method.
CN104942261A (en) * 2014-03-25 2015-09-30 苏州慧驰轻合金精密成型科技有限公司 Novel piston extrusion casting machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS607211A (en) * 1983-06-24 1985-01-16 Nec Corp Differential amplifier circuit
JPS60160209A (en) * 1984-01-31 1985-08-21 Fujitsu Ltd Fet differential amplifier circuit

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DE1583631B2 (en) * 1967-11-10 1975-03-20 Badische Maschinenfabrik Gmbh, 7500 Karlsruhe Press-in device for hydraulically operated die casting machines
DE2010181B2 (en) * 1969-03-04 1971-06-09 PRESS MECHANISM IN DIE CASTING MACHINES WITH HYDRAULIC DRIVE
DE2450805B2 (en) * 1973-10-29 1976-12-30 Societe de Vente de T Aluminium Pechiney, Paris DIE CASTING PROCESS FOR NEON METALS AND NF ALLOYS AND DEVICE FOR ITS IMPLEMENTATION
DE2355594A1 (en) * 1973-11-07 1975-05-15 Valentin Emmerich Pressure casting machine control - has high pressure booster with stepped piston for finishing pressure phase accumulator
DE2747066B1 (en) * 1977-10-20 1979-03-15 Weingarten Ag Maschf Device for setting the plunger speeds and pressures in die casting machines with a three-phase system, in particular in cold chamber die casting machines
DE2854075B1 (en) * 1978-12-14 1980-01-17 Weingarten Ag Maschf Die casting machine with a press piston which can be displaced in a press cylinder and a pressure multiplier for generating an increased pressure in the press cylinder work space towards the end of the working stroke of the press piston

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CN104942261A (en) * 2014-03-25 2015-09-30 苏州慧驰轻合金精密成型科技有限公司 Novel piston extrusion casting machine

Also Published As

Publication number Publication date
JPS5717365A (en) 1982-01-29
BG31832A1 (en) 1982-04-15
CS231982B2 (en) 1985-01-16
IN154994B (en) 1984-12-22
SU1150054A1 (en) 1985-04-15
EP0037125B1 (en) 1983-10-12
DE3161158D1 (en) 1983-11-17
ATE4967T1 (en) 1983-10-15
DD160894A5 (en) 1984-06-13
CS239581A2 (en) 1984-01-16
US4393916A (en) 1983-07-19

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