EP0285687B1 - Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine - Google Patents

Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine Download PDF

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Publication number
EP0285687B1
EP0285687B1 EP87105123A EP87105123A EP0285687B1 EP 0285687 B1 EP0285687 B1 EP 0285687B1 EP 87105123 A EP87105123 A EP 87105123A EP 87105123 A EP87105123 A EP 87105123A EP 0285687 B1 EP0285687 B1 EP 0285687B1
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EP
European Patent Office
Prior art keywords
suction tube
casting chamber
guide
support sleeve
coupling position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87105123A
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German (de)
French (fr)
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EP0285687A1 (en
Inventor
Wilfried Schwab
Heinz Ulmer
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Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
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Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
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Application filed by Maschinenfabrik Mueller Weingarten AG, Vereinigte Aluminium Werke AG filed Critical Maschinenfabrik Mueller Weingarten AG
Priority to DE8787105123T priority Critical patent/DE3764263D1/en
Priority to EP87105123A priority patent/EP0285687B1/en
Priority to AT87105123T priority patent/ATE55295T1/en
Publication of EP0285687A1 publication Critical patent/EP0285687A1/en
Application granted granted Critical
Publication of EP0285687B1 publication Critical patent/EP0285687B1/en
Anticipated expiration legal-status Critical
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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
    • 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
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • 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
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • the invention relates to a device for attaching a suction pipe to the casting chamber of a vacuum pressure die-casting machine with a guide frame, which has a holding plate which interchangeably holds the upper end of the suction pipe, which together with it between a coupling position in which the suction pipe connects to the insertion opening of the fixed casting chamber is connected, and a decoupling position, in which the upper end of the suction pipe is located at a distance from the insertion opening of the casting chamber, is longitudinally displaceable and is pressed against the insertion opening of the casting chamber in the coupling position.
  • the object of the invention is to further develop a device of the type mentioned at the outset so that, with a significantly simplified structure and increased operational reliability, it also provides considerably better accessibility to the upper end of the intake manifold in its uncoupling position and thus facilitates quicker removal and quick replacement enables the same.
  • this is achieved in a device of the generic type in that a spring member is provided in the coupling position for applying the pressure force of the suction pipe against the casting chamber, which continuously biases the guide frame towards its coupling position even in the uncoupled state, and in that the holding plate together with the upper end of the suction pipe in the uncoupled state can be swiveled sideways relative to the guide frame.
  • the device according to the invention represents a quick-action clamping device which enables a particularly rapid exchange of the suction tube and always ensures a uniform contact pressure of the suction tube against the casting chamber in the coupling position (working position). Because in that the pretension of the spring is structurally predetermined in the switching position, it is achieved that in this working position, i.e. even after an exchange process, the same contact pressure always occurs and no longer z. B. by re-tightening a clamping screw after each replacement process, a new, possibly different clamping force is generated.
  • the fact that the holding plate can be swiveled sideways in the decoupling position means that the suction tube can be pivoted away completely from the casting chamber and is therefore particularly easily accessible in order to be able to carry out replacement or other work there.
  • Suitable spring elements such as mechanical springs in the form of coil springs or also disc springs, can be used to apply the spring preload in the coupling position.
  • a gas spring is very particularly preferably provided in the guide frame for applying the pressing force.
  • the guide frame for holding the upper end of the suction pipe is further provided with a holding plate which holds the suction pipe in its central region (which just protrudes as much as is required to guide it into the insertion opening in its end position ), while the holding plate is fastened at its two end regions to the lower end of one of two guide parts mounted perpendicular to it and parallel to each other on both sides of the casting chamber, by means of which it can be moved away from the casting chamber, the holding plate at the end of the one Guide part is attached via a swivel joint and at the end of the other guide part via a releasable locking device, such as a suitable locking pin.
  • a releasable locking device such as a suitable locking pin.
  • the two guide parts are preferably connected to one another at their other ends above the casting chamber via two cross plates, both of which receive a support sleeve in their approximately central region, which extends through the two cross plates and has an internal receptacle in the interior, in which the spring member is supported with its lower end on a contact surface on top of the casting chamber and with its upper end at the end of the inner receptacle of the support sleeve, the support sleeve being articulated at its upper end to an actuating lever which is pivotally attached to the die casting machine.
  • a configuration of the guide frame is achieved which not only consists of relatively few individual components, but is also particularly quick to operate with excellent functionality.
  • the suction pipe located in the working position on the casting chamber the operator only has to grasp the lever pivotally attached to the die casting machine and press it down from an upper starting position: the two cross plates and so that the lateral guide parts connected to them also move downwards and relative to the (stationary) casting chamber, against the force of the pretensioning device, which is supported with its lower end on the stationary casting chamber.
  • this also triggers a downward movement of the holding plate, which holds the upper end of the suction tube, whereby the suction tube is simultaneously guided out of the insertion opening on the casting chamber and moved away from the casting chamber.
  • a suitable locking device which holds the frame in this position, after which only the releasable fastening of one end of the holding plate at the lower end of the one guide part has to be opened in order to hold the holding plate laterally around the trained as a swivel joint other end of the guide plate to be able to pivot outward and thereby to reach the final decoupling position in which the intake manifold is easily accessible for replacement or conversion.
  • the pivoting movement of the lever by the operator can be carried out quickly, likewise the subsequent locking of the frame in this position, and also the loosening of the fastening of the holding plate and its pivoting outwards can take place quickly.
  • the whole process can therefore be carried out extremely quickly and the time required for this is comparatively very low. If the suction tube is replaced, the holding plate is pivoted back again, its free end is locked at the end of the other guide rail and then the locking of the frame is released, after which the force of the prestressed spring element has already moved the frame into its upper coupling position and at the same time the upper one End of the suction pipe is pressed against the receiving opening on the casting chamber.
  • the fact that the spring member in this end position, i.e. the coupling position, is still biased, it is ensured that the upper end of the suction tube is always pressed against the casting chamber and thus precisely defined contact conditions are created.
  • the spring is preferably designed so that the strength of its bias can be selected in the coupling position, i.e. can be set in the desired size so that, if desired, even different pressure forces could be built up in the coupling position.
  • the guide parts are provided with lateral guide strips which are displaceable in guide blocks attached to the die casting machine and are guided and mounted in a form-fitting manner.
  • receiving bores for locking bolts are preferably provided along the guide strips and a corresponding contact surface for locking bolts which can be inserted into the bores is provided on the bottom and / or top of each guide block.
  • a gas spring as a spring member in the support sleeve
  • its diameter is preferably chosen to be smaller than that of the inner receptacle of the support sleeve and, at the same time, it is pivotally attached to the support sleeve at its upper end via a transverse axis, preferably in the form of a pivot pin. This ensures that the gas spring within the support sleeve can also assume a position slightly inclined to align the support sleeve when the frame is pressed down to accommodate lateral displacement movements between the frame and gas spring.
  • Another preferred embodiment of the device according to the invention also consists in that an electric heater surrounding the upper end region of the suction pipe is attached to the holding plate, into which the suction pipe can be inserted or pulled out in the decoupling position.
  • the intake manifold holder shown in Figs. 1 and 2 has two horizontally arranged cross plates 1 which are rigidly attached to two lateral guide parts 2, e.g. via a suitable screw connection or similar
  • the two cross plates 1 are connected approximately in their central region to a support sleeve 3, which projects with its outer circumference through two corresponding openings in the cross plates 1, so that it passes through the cross plates 1.
  • the support sleeve 3 has an inner receptacle 17 in its interior in such a way that it is open at the bottom while being closed at its other, upper end.
  • a spring device in the form of a gas spring 4 is installed, which, as shown in FIG. 3, is laterally pivotally attached to the support sleeve 3 at its upper end via a cross bolt 24 and has a diameter which is significantly smaller than the diameter of the inner receptacle 17 and is only about half of the same.
  • the gas spring 4 is supported with its lower end on a contact surface 18 which is formed on top of the casting chamber 8.
  • the support sleeve 3 is articulated in its extension upwards via a swivel bracket 5 to an actuating lever 6 which is pivotally supported at its end near the connection point on a plate 7 which in turn is attached to a fixed frame, for example the die casting machine itself, can be attached.
  • the plate 7 is fastened by means of fastening screws 9 which are mounted in two lateral, parallel longitudinal slots of the plate 7, so that the height of the articulation point of the actuating lever 6 can be adjusted accordingly.
  • the cross plates 1 and the guide parts 2 together with a lower holding plate 11 form a guide frame 10.
  • the lower holding plate 11 is designed as a flat plate which is pivoted at one end via a pivot axis 13 at the lower end of the guide part 2 shown in the figures on the left, while it is at its other end via a suitable locking device, for example in shape a suitably designed locking bolt 15 is attached to the lower end of the other guide part 2.
  • This locking bolt 15 is, however, designed such that, in the coupling position shown in FIG.
  • the upper end 16 of a suction pipe 12 is fastened approximately centrally at a suitable location, an electric heater 14 for the end region of the suction pipe 12 also being attached to the holder 11 at the same time.
  • the suction pipe 12 is fastened to the holding plate 11 in such a way that it protrudes from the holder 11 at its end exactly as far as is necessary for a precise fitting of its end into the corresponding inlet opening on the casting chamber 8.
  • the suction pipe 12 is preferably held in the holding plate 11 by means of a spherical holding flange 16, as can be seen in FIGS. 1 and 2.
  • the frame In the coupling position shown in Fig. 1, the frame is pressed into its upper position by the biasing force which is applied by the gas spring 4, i.e. the operating lever 6 is also in its upper position; at the same time, the holding plate 11 with the end of the suction tube 12 fastened therein is pressed against the casting chamber 8 from below, the upper end of the suction tube 12 is brought into contact precisely with the filling opening of the casting chamber 8 and is under the predetermined prestress with which the gas spring 4 still pushes up in the coupling position.
  • the two guide parts 2 arranged parallel to each other are provided with laterally projecting guide strips 19, which in corresponding, for. B. are mounted on the die casting guide blocks 20 (in FIGS. 1 and 2, because of the perspective view, only the guide block 20 arranged on the right side is shown, the guide block 20 on the other side is covered by the projecting flange of the guide part, but available).
  • the recesses in the guide blocks 20 are chosen exactly according to the shape of the lateral guide strips 19, so that both guide parts 2 are guided precisely and parallel to one another along the guide block 20 via the guide strips 19.
  • receiving bores 21 are provided at regular intervals, into which locking pins 22 (cf. FIG. 2) can be inserted.
  • the locking pins 22 On the top and bottom of the guide blocks 20, the locking pins 22 have corresponding contact surfaces 23 (see FIG. 1), so that when a locking bolt 22 is inserted, the bolt 4 is pressed against the corresponding contact surface 23 of the guide block 20 due to the pressure effect of the spring 4 the desired position locking is thereby achieved (cf. FIG. 2).
  • the guide frame 10 When removing the suction pipe 12, the guide frame 10 is by the lever 6 and the tab 5th pressed down so that the upper part of the intake manifold is moved away from the casting chamber 8.
  • the locking bolt 15 In the lower position of the actuating lever 6, in which the locking bolts 22 cause the guide frame 10 to be locked in position relative to the guide blocks 20, the locking bolt 15 is then opened and the holding plate -11 is pivoted out about the pivot axis 13, as shown in FIG. 2 .
  • the suction pipe 12 is pivoted together with the holding plate 11 and can now be pulled out of the electric heater 14 or a new suction pipe 12 can be inserted.
  • the process is reversed, i.e. the holding plate 11 is pivoted back again until it comes into contact with the locking bolt 15, which is then brought into its locking position. Then the position of the guide frame 10 is released by pulling the locking pins 22 out of the mounting holes 21, after which the guide frame 10 is automatically raised under the force of the compressed gas spring 4 until the upper end of the suction tube 12 is pressed against the inlet opening on the casting chamber 8 . In this position, the guide frame 10 is held under the pre-tensioning of the gas spring 4 (coupling position, working position).

Abstract

1. Device for attaching a suction tube (12) to the casting chamber (8) of a vacuum die casting machine including a guide frame which has a mounting plate (11) which removably supports the upper end of the suction tube (12) and which is mounted so as to be longitudinally movable with it between a coupling position, in which the suction tube (12) is connected to the insertion opening of the fixed casting chamber, and a decoupling position, in which the upper end of the suction tube (12) is spaced from the insertion opening of the casting chamber (8), and is pressed in the coupling position towards the insertion opening of the casting chamber (8), characterised in that a spring element (4) is provided for applying the pressure of the suction tube (12) against the casting chamber (8) in the coupling position, which spring element constantly urges the guide frame (10) in the direction towards its coupling position, even in the decoupled state and that in the decoupled state the mounting plate (11) may be swung out laterally together with the upper end of the suction tube (12) with respect to the guide frame (10).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Befestigen eines Saugrohres an der Gießkammer einer Vakuum-Druckgießmaschine mit einem Führungsgestell, das eine das obere Ende des Saugrohres auswechselbar halternde Halteplatte aufweist, die zusammen mit ihm zwischen einer Ankoppelstellung, in der das Saugrohr an die Einführöffnung der ortsfesten Gießkammer angeschlossen ist, und einer Abkoppelstellung, in der das obere Ende des Saugrohres sich in einem Abstand von der Einführöffnung der Gießkammer befindet, längsverschieblich angebracht und in der Ankoppelstellung gegen die Einführöffnung der Gießkammer angedrückt ist.The invention relates to a device for attaching a suction pipe to the casting chamber of a vacuum pressure die-casting machine with a guide frame, which has a holding plate which interchangeably holds the upper end of the suction pipe, which together with it between a coupling position in which the suction pipe connects to the insertion opening of the fixed casting chamber is connected, and a decoupling position, in which the upper end of the suction pipe is located at a distance from the insertion opening of the casting chamber, is longitudinally displaceable and is pressed against the insertion opening of the casting chamber in the coupling position.

Zur Befestigung der Saugrohre an den Gießkammern von Vakuum-Druckgießmaschinen wurden bislang häufig Spannschrauben und Haltebügel eingesetzt, über die jeweils das obere Ende eines Saugrohres an die Einführöffnung der Gießkammer angedrückt wird. Da hier aber das Entfernen bzw. Auswechseln eines Saugrohres ein Öffnen der Spannschraube und ein Entfernen des Haltebügels verlangt, was relativ zeitaufwendig ist, wurde für einen schnelleren Umbau bzw. Ausbau des Saugrohres eine besondere Vorrichtung mit Exzentern entwickelt und angebaut. Hierdurch ist zwar ein rascheres Auswechseln bzw. Ausbauen des Saugrohres möglich, die Umrüstung erwies sich dennoch nach wie vor als nicht zufriedenstellend.To fasten the suction pipes to the casting chambers of vacuum die casting machines, clamping screws and holding brackets have been used up to now, via which the upper end of a suction pipe is pressed onto the insertion opening of the casting chamber. However, since removing or replacing a suction pipe requires opening the tensioning screw and removing the retaining bracket, which is relatively time-consuming, a special device with eccentrics was developed and installed for faster conversion or removal of the suction pipe. Although this makes it possible to replace or remove the suction pipe more quickly, the retrofitting has still not proven to be satisfactory.

Aus der US-A 2 837 792 ist eine Vorrichtung der eingangs genannten Art bekannt, bei der das Haltegestell für das Saugrohrende von der Gießkammer weg verschiebbar und dadurch das Saugrohr abkoppelbar ist. Dieses Abkoppeln des Saugrohrendes dient dabei dem Zweck, das Auslaßende des Saugrohres in die Schmelze einzutauchen, um es möglichst warm zu halten und ein Erstarren der Schmelze innerhalb des Rohres zu vermeiden. Ein Entfernen bzw. Auswechseln des Saugrohres aus bzw. in der Halterung ist dabei im Prinzip möglich, jedoch wegen sehr beengter Platzverhältnisse und schlechter Zugänglichkeit schwierig und zeitaufwendig. Überdies besteht bei der bekannten Vorrichtung im Falle eines Hydraulikausfalls die Gefahr, daß die Gesamtmaschine nicht mehr betriebssicher weiterbetrieben werden kann, da dann eine dichtende Druckanlage zwischen Saugrohrende und Gießkammer nicht mehr sicher gewährleistet ist.From US-A 2 837 792 a device of the type mentioned is known in which the holding frame for the suction pipe end can be moved away from the casting chamber and the suction pipe can thereby be uncoupled. This decoupling of the suction pipe end serves the purpose of immersing the outlet end of the suction pipe into the melt in order to keep it as warm as possible and to prevent the melt from solidifying within the pipe. A removal or replacement of the suction pipe from or in the holder is possible in principle, but difficult and time-consuming because of the very limited space and poor accessibility. Moreover, in the known device in the event of a hydraulic failure, there is a risk that the entire machine can no longer be operated in a reliable manner, since then a sealing pressure system between the end of the intake manifold and the casting chamber can no longer be guaranteed.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so weiterzubilden, daß sie bei deutlich vereinfachtem Aufbau und gesteigerter Betriebssicherheit auch eine erheblich bessere Zugänglichkeit des oberen Saugrohrendes in dessen Abkoppelstellung und damit einen erleichterten und rascheren Ausbau bzw. ein schnelles Auswechseln desselben ermöglicht.Proceeding from this, the object of the invention is to further develop a device of the type mentioned at the outset so that, with a significantly simplified structure and increased operational reliability, it also provides considerably better accessibility to the upper end of the intake manifold in its uncoupling position and thus facilitates quicker removal and quick replacement enables the same.

Erfindungsgemäß wird dies bei einer Vorrichtung der gattungsgemäßen Art dadurch erreicht, daß zum Aufbringen der Andruckkraft des Saugrohres gegen die Gießkammer in der Ankoppelstellung ein Federglied vorgesehen ist, welches das Führungsgestell auch im abgekoppelten Zustand laufend in Richtung auf seine Ankoppelstellung hin vorspannt, und daß die Halteplatte samt oberem Ende des Saugrohres im abgekoppelten Zustand gegenüber dem Führungsgestell seitlich abschwenkbar ist.According to the invention, this is achieved in a device of the generic type in that a spring member is provided in the coupling position for applying the pressure force of the suction pipe against the casting chamber, which continuously biases the guide frame towards its coupling position even in the uncoupled state, and in that the holding plate together with the upper end of the suction pipe in the uncoupled state can be swiveled sideways relative to the guide frame.

Die erfindungsgemäße Vorrichtung stellt eine Schnellspannvorrichtung dar, die einen besonders raschen Austausch des Saugrohres ermöglicht und in der Ankoppelstellung (Arbeitsstellung) stets eine gleichmäßige Anpreßkraft des Saugrohres gegen die Gießkammer sicherstellt. Denn dadurch, daß die Vorspannung der Feder in der Schaltstellung konstruktiv vorgegeben wird, wird erreicht, daß in dieser Arbeitsstellung, d.h. auch nach einem Auswechselvorgang, stets die gleiche Anpreßkraft auftritt und nicht mehr z. B. durch ein erneutes Festschrauben einer Spannschraube nach jedem Auswechselvorgang eine neue, möglicherweise unterschiedliche Spannkraft erzeugt wird. Durch die auch im abgekoppelten Zustand wirksame Rückstellkraft der vorgespannten Feder wird auch im Fall eines Ausfalls der Abkoppelkräfte stets eine dichtende Druckanlage des Saugrohrendes an der Gießkammer und damit ein Weiterbetrieb der Gesamtmaschine sichergestellt.The device according to the invention represents a quick-action clamping device which enables a particularly rapid exchange of the suction tube and always ensures a uniform contact pressure of the suction tube against the casting chamber in the coupling position (working position). Because in that the pretension of the spring is structurally predetermined in the switching position, it is achieved that in this working position, i.e. even after an exchange process, the same contact pressure always occurs and no longer z. B. by re-tightening a clamping screw after each replacement process, a new, possibly different clamping force is generated. As a result of the restoring force of the prestressed spring, which is also effective in the uncoupled state, a sealing pressure system of the suction pipe end on the casting chamber and thus continued operation of the entire machine is always ensured even in the event of a failure of the decoupling forces.

Durch die seitliche Abschwenkbarkeit der Halteplatte in der Abkoppelstellung wird erreicht, daß das Saugrohr von der Gießkammer völlig weggeschwenkt werden kann und dadurch besonders leicht zugänglich wird, um dort Auswechsel- oder sonstige Arbeiten vorzunehmen zu können.The fact that the holding plate can be swiveled sideways in the decoupling position means that the suction tube can be pivoted away completely from the casting chamber and is therefore particularly easily accessible in order to be able to carry out replacement or other work there.

Zum Aufbringen der Federvorspannung in der Ankoppelstellung lassen sich alle geeigneten Federglieder, etwa mechanische Federn in Form von Schraubenfedern oder auch Tellerfedern, einsetzen. Ganz besonders bevorzugt wird hier jedoch eine Gasfeder im Führungsgestell zum Aufbringen der Andruckkraft vorgesehen.All suitable spring elements, such as mechanical springs in the form of coil springs or also disc springs, can be used to apply the spring preload in the coupling position. However, a gas spring is very particularly preferably provided in the guide frame for applying the pressing force.

Bevorzugt wird bei der erfindungsgemäßen Vorrichtung ferner das Führungsgestell zur Halterung des oberen Endes des Saugrohres mit einer Halteplatte versehen, die in ihrem mittleren Bereich das Saugrohr hält (das dabei gerade um soviel übersteht, wie benötigt wird, um es in seiner Endstellung in die Einführöffnung hineinzuführen), während die Halteplatte an ihren beiden Endbereichen jeweils am unteren Ende eines von zwei senkrecht zu ihr und parallel zueinander beidseits der Gießkammer angebrachten Führungsteilen befestigt ist, mittels derer sie zur Gießkammer hin- von von dieser wegbewegbar ist, wobei die Halteplatte am Ende des einen Führungsteils über ein Verschwenkgelenk und am Ende des anderen Führungsteils über eine lösbare Arretierung, etwa einen geeigneten Arretierungsbolzen, befestigt ist. Hierdurch ergibt sich ein einfacher Aufbau für den das obere Ende des Saugrohres halternden Teil des Führungsgestelles. Die Halteplatte, die in ihrem Mittelbereich das obere Ende des Saugrohres hält, wird zum Überführen des Saugrohres von der Ankoppel- in die Abkoppelstellung zunächst um eine bestimmte Entfernung von der Gießkammer wegbewegt, wonach dann die Befestigung des einen Endes der Halteplatte am zugehörigen Führungsteil gelöst und die Halteplatte um die andere, als Verschwenkgelenk ausgebildete Befestigung am andern Führungsteil einfach und rasch seitlich weggeschwenkt werden kann. Daß diese beiden Vorgänge rasch ausführbar sind (auch in ihrer umgekehrten Reihenfolge), liegt auf der Hand.Preferably, in the device according to the invention, the guide frame for holding the upper end of the suction pipe is further provided with a holding plate which holds the suction pipe in its central region (which just protrudes as much as is required to guide it into the insertion opening in its end position ), while the holding plate is fastened at its two end regions to the lower end of one of two guide parts mounted perpendicular to it and parallel to each other on both sides of the casting chamber, by means of which it can be moved away from the casting chamber, the holding plate at the end of the one Guide part is attached via a swivel joint and at the end of the other guide part via a releasable locking device, such as a suitable locking pin. This results in a simple construction for the part of the guide frame which holds the upper end of the suction pipe. The holding plate, which holds the upper end of the suction tube in its central region, is first moved a certain distance away from the casting chamber to transfer the suction tube from the coupling into the uncoupling position, after which the fastening of one end of the holding plate to the associated guide part is then released and the holding plate around the other, designed as a swivel joint attachment to the other guide part quickly and easily can be pivoted away to the side. It is obvious that these two processes can be carried out quickly (even in the reverse order).

Hierbei werden vorzugsweise die beiden Führungsteile an ihren anderen Enden oberhalb der Gießkammer über zwei Querplatten miteinander verbunden, die beide in ihrem etwa mittleren Bereich eine Stützhülse aufnehmen, die sich durch die beiden Querplatten hindurch erstreckt und in ihrem Inneren eine Innenaufnahme aufweist, in der das Federglied sich mit seinem unteren Ende auf einer Anlagefläche oben auf der Gießkammer und mit seinem oberen Ende am Ende der Innenaufnahme der Stützhülse abstützt, wobei die Stützhülse an ihrem oberen Ende an einem an der Druckgießmaschine verschwenkbar befestigten Betätigungshebel angelenkt ist. Hierdurch wird eine Ausgestaltung des Führungsgestells erreicht, die nicht nur aus relativ wenigen einzelnen Bauelementen besteht, sondern überdies bei einer vorzüglichen Funktionsfähigkeit besonders rasch bedienbar ist. Soll hier z.B. das in der Arbeitsstellung an der Gießkammer befindliche Saugrohr ausgewechselt werden, muß die Bedienungsperson nur den an der Druckgießmaschine verschwenkbar befestigten Hebel ergreifen und ihn aus einer oberen Ausgangsstellung nach unten drücken: dabei werden über die Stützhülse, die am Hebel angelenkt ist, die beiden Querplatten und damit die mit ihnen verbundenen seitlichen Führungsteile ebenfalls nach unten und relativ zur (ortsfesten) Gießkammer, entgegen der Kraft der Vorspanneinrichtung, die sich mit ihrem unteren Ende auf der ortsfesten Gießkammer abstützt, bewegt. Dies löst aber gleichzeitig auch eine Bewegung der Halteplatte, die das obere Ende des Saugrohres hält, nach unten aus, wodurch das Saugrohr gleichzeitig aus der Einführöffnung an der Gießkammer herausgeführt und von der Gießkammer wegbewegt wird. Ist der Hebel in seine untere Stellung gebracht, wird eine geeignete Arretierung eingesetzt, die das Gestell in dieser Lage festhält, wonach nur mehr die lösbare Befestigung des einen Endes der Halteplatte am unteren Ende des einen Führungsteiles geöffnet werden muß, um die Halteplatte seitlich um das als Schwenkgelenk ausgebildete andere Ende der Führungsplatte nach außen schwenken zu können und dadurch die Abkoppel-Endposition zu erreichen, in der das Saugrohr für ein Auswechseln oder Umbauen gut zugänglich ist. Die Verschwenkbewegung des Hebels durch die Bedienungsperson ist rasch durchführbar, gleichermaßen das anschließende Arretieren des Gestells in dieser Stellung, und auch das Lösen der Befestigung der Halteplatte und deren Verschwenkung nach außen kann schnell erfolgen. Der ganze Vorgang ist somit außerordentlich rasch ausführbar und der zeitliche Aufwand hierfür ist vergleichsweise sehr gering. Ist das Saugrohr ausgewechselt, wird die Halteplatte wieder zurückverschwenkt, mit ihrem freien Ende an dem Ende der anderen Führungsleiste arretiert und danach die Arretierung des Gestells aufgehoben, wonach bereits durch die Kraft des vorgespannten Federgliedes das Gestell in seine obere Ankoppelstellung gefahren und dabei gleichzeitig das obere Ende des Saugrohres gegen die Aufnahmeöffnung an der Gießkammer angedrückt wird. Dadurch, daß das Federglied in dieser Endstellung, d.h. der Ankoppelstellung, noch immer vorgespannt ist, wird sichergestellt, daß auch das obere Ende des Saugrohres stets gegen die Gießkammer angedrückt und damit genau definierte Anpreßverhältnisse geschafft werden. Dabei wird bevorzugt die Feder so ausgeführt, daß die Stärke ihrer Vorspannung in der Ankoppelstellung wählbar ist, d.h. in der gewünschten Größe eingestellt werden kann, so daß, falls gewünscht, sogar unterschiedliche Andruckkräfte in der Ankoppelstellung aufgebaut werden könnten.In this case, the two guide parts are preferably connected to one another at their other ends above the casting chamber via two cross plates, both of which receive a support sleeve in their approximately central region, which extends through the two cross plates and has an internal receptacle in the interior, in which the spring member is supported with its lower end on a contact surface on top of the casting chamber and with its upper end at the end of the inner receptacle of the support sleeve, the support sleeve being articulated at its upper end to an actuating lever which is pivotally attached to the die casting machine. In this way, a configuration of the guide frame is achieved which not only consists of relatively few individual components, but is also particularly quick to operate with excellent functionality. For example, the suction pipe located in the working position on the casting chamber, the operator only has to grasp the lever pivotally attached to the die casting machine and press it down from an upper starting position: the two cross plates and so that the lateral guide parts connected to them also move downwards and relative to the (stationary) casting chamber, against the force of the pretensioning device, which is supported with its lower end on the stationary casting chamber. However, this also triggers a downward movement of the holding plate, which holds the upper end of the suction tube, whereby the suction tube is simultaneously guided out of the insertion opening on the casting chamber and moved away from the casting chamber. If the lever is brought into its lower position, a suitable locking device is used which holds the frame in this position, after which only the releasable fastening of one end of the holding plate at the lower end of the one guide part has to be opened in order to hold the holding plate laterally around the trained as a swivel joint other end of the guide plate to be able to pivot outward and thereby to reach the final decoupling position in which the intake manifold is easily accessible for replacement or conversion. The pivoting movement of the lever by the operator can be carried out quickly, likewise the subsequent locking of the frame in this position, and also the loosening of the fastening of the holding plate and its pivoting outwards can take place quickly. The whole process can therefore be carried out extremely quickly and the time required for this is comparatively very low. If the suction tube is replaced, the holding plate is pivoted back again, its free end is locked at the end of the other guide rail and then the locking of the frame is released, after which the force of the prestressed spring element has already moved the frame into its upper coupling position and at the same time the upper one End of the suction pipe is pressed against the receiving opening on the casting chamber. The fact that the spring member in this end position, i.e. the coupling position, is still biased, it is ensured that the upper end of the suction tube is always pressed against the casting chamber and thus precisely defined contact conditions are created. The spring is preferably designed so that the strength of its bias can be selected in the coupling position, i.e. can be set in the desired size so that, if desired, even different pressure forces could be built up in the coupling position.

In weiterer bevorzugter Ausgestaltung der erfindungsgemäßen Vorrichtung werden die Führungsteile mit seitlichen Führungsleisten versehen, die in an der Druckgießmaschine befestigten Führungsblöcken verschiebbar sowie formschlüssig geführt und gelagert sind. Bevorzugt werden dabei längs der Führungsleisten Aufnahmebohrungen für Arretierbolzen vorgesehen und auf der Unter- und/oder Oberseite jedes Führungsblocks eine entsprechende Anlagefläche für in die Bohrungen einsteckbare Arretierbolzen angebracht. Bei Erreichen einer gewünschten Arretierstellung können die entsprechenden Arretierbolzen in die Aufnahmebohrungen eingesteckt sowie unter Wirkung der Federvorspannung gegen die zugeordneten Anlageflächen an den Führungsblöcken angedrückt werden, was die gewünschte Blockierung bewirkt.In a further preferred embodiment of the device according to the invention, the guide parts are provided with lateral guide strips which are displaceable in guide blocks attached to the die casting machine and are guided and mounted in a form-fitting manner. In this case, receiving bores for locking bolts are preferably provided along the guide strips and a corresponding contact surface for locking bolts which can be inserted into the bores is provided on the bottom and / or top of each guide block. When a desired locking position is reached, the corresponding locking bolts can be inserted into the mounting bores and pressed against the associated contact surfaces on the guide blocks under the action of the spring preload, which brings about the desired blocking.

Bei der Verwendung einer Gasfeder als Federglied in der Stützhülse wird deren Durchmesser bevorzugt kleiner als der der Innenaufnahme der Stützhülse gewählt und sie gleichzeitig an ihrem oberen Ende über eine Querachse, vorzugsweise in Form eines Verschwenkbolzens, verschwenkbar an der Stützhülse befestigt. Hierdurch wird erreicht, daß die Gasfeder innerhalb der Stützhülse auch eine zur Ausrichtung der Stützhülse leicht geneigte Lage bei Herabdrücken des Gestells zur Aufnahme von seitlichen Versetzbewegungen zwischen Gestell und Gasfeder einnehmen kann.When using a gas spring as a spring member in the support sleeve, its diameter is preferably chosen to be smaller than that of the inner receptacle of the support sleeve and, at the same time, it is pivotally attached to the support sleeve at its upper end via a transverse axis, preferably in the form of a pivot pin. This ensures that the gas spring within the support sleeve can also assume a position slightly inclined to align the support sleeve when the frame is pressed down to accommodate lateral displacement movements between the frame and gas spring.

Eine weitere vorzugsweise Ausgestaltung der erfindungsgemäßen Vorrichtung besteht auch darin, daß an der Halteplatte eine den oberen Endbereich des Saugrohres umgebende Elektroheizung angebracht ist, in die das Saugrohr in der Abkoppelstellung einschiebbar bzw. aus ihr herausziehbar ist. Hierdurch wird der ganz wesentliche Vorteil erzielt, daß ein schneller Austausch des Saugrohres möglich ist, ohne daß gleichzeitig die Heizung demontiert werden muß, daß somit der Anbau einer Elektroheizung in geschlossener Ausführung unabhängig vom auszuwechselnden Saugrohr erfolgen kann.Another preferred embodiment of the device according to the invention also consists in that an electric heater surrounding the upper end region of the suction pipe is attached to the holding plate, into which the suction pipe can be inserted or pulled out in the decoupling position. This gives the very important advantage that a quick exchange of the intake manifold is possible without having to dismantle the heating at the same time, so that the installation of an electric heater can be done in a closed version regardless of the intake manifold to be replaced.

Mit der erfindungsgemäßen Einrichtung ist insgesamt nicht nur ein rascher Austausch des Saugrohres und das Aufbringen einer gleichmäßigen Anpreßkraft, sondern überdies auch eine sehr exakte Führung des Saugrohres bei den Auswechselbewegungen möglich, wodurch sich gegenüber den bislang bekannten Vorrichtungen der große Vorteil deutlich verringerter Ausbauzeiten und verbesserter Gleichmäßigkeit der Anpreßkräfte in der Arbeitsteilung erreichen läßt.Overall, with the device according to the invention not only a quick exchange of the suction pipe and the application of a uniform contact pressure, but also a very exact guidance of the suction pipe during the exchange movements is possible, whereby the great advantage of the previously known devices is significantly reduced removal times and improved uniformity the contact forces in the division of labor.

Die Erfindung wird nachfolgend anhand der Zeichnung im Prinzip beispielshalber noch näher erläutert. Es zeigen:

  • Fig. 1 eine erfindungsgemäße Vorrichtung in ihrer Ankoppelstellung (bei teilweise angeschnittener Gießkammer);
  • Fig. 2 eine erfindungsgemäße Vorrichtung in ihrer Abkoppelstellung mit abgeschwenktem Saugrohr sowie
  • Fig. 3 eine prinzipielle Teilschnittdarstellung durch eine Stützhülse mit eingebauter Gasfeder bei einer erfindungsgemäßen Vorrichtung.
The invention is based on the Drawing explained in principle for the sake of example. Show it:
  • 1 shows a device according to the invention in its coupling position (with a partially cut casting chamber);
  • Fig. 2 shows a device according to the invention in its uncoupled position with the intake manifold pivoted as well
  • Fig. 3 is a basic partial sectional view through a support sleeve with built-in gas spring in a device according to the invention.

Die in den Fig. 1 und 2 gezeigte Saugrohrhalterung weist zwei horizontal angeordnete Querplatten 1 auf, die an zwei seitlichen Führungsteilen 2 starr befestigt sind, z.B. über eine geeignete Verschraubung o.ä.The intake manifold holder shown in Figs. 1 and 2 has two horizontally arranged cross plates 1 which are rigidly attached to two lateral guide parts 2, e.g. via a suitable screw connection or similar

Die beiden Querplatten 1 sind etwa in ihrem mittleren Bereich mit einer Stützhülse 3 verbunden, die mit ihrem Außenumfang durch zwei entsprechende Öffnungen in den Querplatten 1 hindurchragt, so daß sie die Querplatten 1 durchsetzt. Wie Fig. 3 zeigt, weist die Stützhülse 3 in ihrem Inneren eine Innenaufnahme 17 derart auf, daß diese nach unten hin offen ist, während sie an ihrem anderen, oberen Ende verschlossen ist.The two cross plates 1 are connected approximately in their central region to a support sleeve 3, which projects with its outer circumference through two corresponding openings in the cross plates 1, so that it passes through the cross plates 1. As shown in FIG. 3, the support sleeve 3 has an inner receptacle 17 in its interior in such a way that it is open at the bottom while being closed at its other, upper end.

In diese Innenaufnahme 17 ist eine Federeinrichtung in Form einer Gasfeder 4 eingebaut, die wie Fig. 3 zeigt, an ihrem oberen Ende über einen Querbolzen 24 seitlich verschwenkbar an der Stützhülse 3 befestigt ist und einen Durchmesser aufweist, der deutlich geringer als der Durchmesser der Innenaufnahme 17 ist und etwa nur die Hälfte desselben beträgt.In this inner receptacle 17, a spring device in the form of a gas spring 4 is installed, which, as shown in FIG. 3, is laterally pivotally attached to the support sleeve 3 at its upper end via a cross bolt 24 and has a diameter which is significantly smaller than the diameter of the inner receptacle 17 and is only about half of the same.

Die Gasfeder 4 stützt sich, wie aus den Fig. 1 und 2 erkennbar ist, mit ihrem unteren Ende auf einer Anlagefläche 18 ab, die oben auf der Gießkammer 8 ausgebildet ist.As can be seen from FIGS. 1 and 2, the gas spring 4 is supported with its lower end on a contact surface 18 which is formed on top of the casting chamber 8.

Die Stützhülse 3 ist in ihrer Verlängerung nach oben über eine Verschwenklasche 5 gelenkig mit einem Betätigungshebel 6 verbunden, der an seinem in der Nähe der Verbindungsstelle gelegenen Ende verschwenkbar an einer Platte 7 gehaltert ist, die ihrerseits an einem festen Gestell, etwa der Druckgießmaschine selbst, befestigt sein kann. Die Befestigung der Platte 7 erfolgt dabei über Befestigungssschrauben 9, die in zwei seitlichen, parallel zueinander angeordneten Längsschlitzen der Platte 7 angebracht sind, so daß die Höhenlage des Anlenkpunktes des Betätigungshebels 6 entsprechend eingestellt werden kann.The support sleeve 3 is articulated in its extension upwards via a swivel bracket 5 to an actuating lever 6 which is pivotally supported at its end near the connection point on a plate 7 which in turn is attached to a fixed frame, for example the die casting machine itself, can be attached. The plate 7 is fastened by means of fastening screws 9 which are mounted in two lateral, parallel longitudinal slots of the plate 7, so that the height of the articulation point of the actuating lever 6 can be adjusted accordingly.

Die Querplatten 1 und die Führungsteile 2 bilden zusammen mit einer unteren Halteplatte 11 ein Führungsgestell 10 aus. Die untere Halteplatte 11 ist dabei als eine ebene Platte ausgeführt, die an ihrem einen Ende über eine Verschwenkachse 13 am unteren Ende des in den Figuren links dargestellten Führungsteils 2 verschwenkbar angelenkt ist, während sie mit ihrem anderen Ende über eine geeignete Arretierung, etwa in Form eines geeignet ausgebildeten Arretierungsbolzens 15, am unteren Ende des anderen Führungsteils 2 befestigt ist. Dieser Arretierungsbolzen 15 ist allerdings so ausgebildet, daß zwar bei der in Fig. 1 gezeigten Ankoppelstellung eine starre Befestigung zum unteren Ende des rechten Führungsteiles 2 hergestellt wird daß jedoch andererseits auch, wenn man den Betätigungshebel 6 und damit das Führungsgesteil 10 zusammen mit der Halteplatte 11 nach unten drückt, ein leichtes Lösen der Arretierung erfolgen und die Halteplatte 1 seitlich in die in Fig. 2 gezeigte Stellung verschwenkt werden kann.The cross plates 1 and the guide parts 2 together with a lower holding plate 11 form a guide frame 10. The lower holding plate 11 is designed as a flat plate which is pivoted at one end via a pivot axis 13 at the lower end of the guide part 2 shown in the figures on the left, while it is at its other end via a suitable locking device, for example in shape a suitably designed locking bolt 15 is attached to the lower end of the other guide part 2. This locking bolt 15 is, however, designed such that, in the coupling position shown in FIG. 1, a rigid attachment to the lower end of the right guide part 2 is produced, but that, on the other hand, when the actuating lever 6 and thus the guide part 10 together with the holding plate 11 presses down, a slight release of the locking takes place and the holding plate 1 can be pivoted laterally into the position shown in FIG. 2.

In der Halteplatte 11 ist etwa mittig an geeigneter Steile das obere Ende 16 eines Saugrohres 12 befestigt, wobei gleichzeitig auch noch eine elektrische Heizung 14 für den Endbereich des Saugrohres 12 ebenfalls an der Halterung 11 angebracht ist. Das Saugrohr 12 ist an der Halteplatte 11 so befestigt, daß es an seinem Ende genau soweit aus der Halterung 11 herausragt, wie dies für ein präzises Einpassen seines Endes in die entsprechende Einlaßöffnung an der Gießkammer 8 erforderlich ist.In the holding plate 11, the upper end 16 of a suction pipe 12 is fastened approximately centrally at a suitable location, an electric heater 14 for the end region of the suction pipe 12 also being attached to the holder 11 at the same time. The suction pipe 12 is fastened to the holding plate 11 in such a way that it protrudes from the holder 11 at its end exactly as far as is necessary for a precise fitting of its end into the corresponding inlet opening on the casting chamber 8.

Vorzugsweise wird das Saugrohr 12 mittels eines kugelförmigen Halteflansches 16 in der Halteplatte 11 gehaltert, wie dies in den Fig. 1 und 2 zu sehen ist.The suction pipe 12 is preferably held in the holding plate 11 by means of a spherical holding flange 16, as can be seen in FIGS. 1 and 2.

Bei der in Fig. 1 gezeigten Ankoppelstellung wird das Gestell über die Vorspannkraft, die von der Gasfeder 4 aufgebracht wird, in seine obere Stellung gedrückt, d.h. der Betätigungshebel 6 befindet sich ebenfalls in seiner oberen Stellung; gleichzeitig ist die Halteplatte 11 mit dem darin befestigten Ende des Saugrohres 12 von unten her gegen die Gießkammer 8 angedrückt, das obere Ende des Saugrohres 12 ist genau an der Einfüllöffnung der Gießkammer 8 in Anlage gebracht und steht unter der vorgegebenen Vorspannung, mit der die Gasfeder 4 auch in der Ankoppelstellung noch nach oben drückt.In the coupling position shown in Fig. 1, the frame is pressed into its upper position by the biasing force which is applied by the gas spring 4, i.e. the operating lever 6 is also in its upper position; at the same time, the holding plate 11 with the end of the suction tube 12 fastened therein is pressed against the casting chamber 8 from below, the upper end of the suction tube 12 is brought into contact precisely with the filling opening of the casting chamber 8 and is under the predetermined prestress with which the gas spring 4 still pushes up in the coupling position.

Die beiden parallel zueinander angeordneten Führungsteile 2 sind mit seitlich vorstehenden Führungsleisten 19 versehen, die in entsprechenden, z. B. an der Druckgießmaschine befestigten Führungsblöcken 20 gelagert sind (in den Fig. 1 und 2 ist wegen der perspektivischen Darstellung nur der auf der rechten Seite angeordnete Führungsblock 20 gezeigt, der Führungsblock 20 auf der anderen Seite ist durch den vorspringenden Flansch des Führungsteiles verdeckt, aber vorhanden). Dabei sind die Ausnehmungen in den Führungsblöcken 20 genau der Form der seitlichen Führungsleisten 19 entsprechend gewählt, so daß längs des Führungsblockes 20 über die Führungsleisten 19 beide Führungsteile 2 genau und parallel zueinander in ihrer Bewegung geführt sind. In den seitlichen Führungsleisten 19 sind, wie aus den Fig. 1 und 2 entnommen werden kann, in gleichmäßigen Abständen Aufnahmebohrungen 21 vorgesehen, in die Arretierstifte 22 (vgl. Fig. 2) eingesteckt werden können. Auf der Ober- und Unterseite der Führungsblöcke 20 sind den Arretierstiften 22 entsprechende Anlageflächen 23 (vgl. Fig. 1) ausgeformt, so daß bei Einstecken eines Arretierbolzens 22 infolge der Druckwirkung der Feder 4 der Bolzen gegen die entsprechende Anlagefläche 23 des Führungsblocks 20 angedrückt und dadurch die gewünschte Lageverriegelung erreicht wird (vgl. Fig. 2).The two guide parts 2 arranged parallel to each other are provided with laterally projecting guide strips 19, which in corresponding, for. B. are mounted on the die casting guide blocks 20 (in FIGS. 1 and 2, because of the perspective view, only the guide block 20 arranged on the right side is shown, the guide block 20 on the other side is covered by the projecting flange of the guide part, but available). The recesses in the guide blocks 20 are chosen exactly according to the shape of the lateral guide strips 19, so that both guide parts 2 are guided precisely and parallel to one another along the guide block 20 via the guide strips 19. In the lateral guide strips 19, as can be seen from FIGS. 1 and 2, receiving bores 21 are provided at regular intervals, into which locking pins 22 (cf. FIG. 2) can be inserted. On the top and bottom of the guide blocks 20, the locking pins 22 have corresponding contact surfaces 23 (see FIG. 1), so that when a locking bolt 22 is inserted, the bolt 4 is pressed against the corresponding contact surface 23 of the guide block 20 due to the pressure effect of the spring 4 the desired position locking is thereby achieved (cf. FIG. 2).

Beim Ausbau des Saugrohres 12 wird das Führungsgestell 10 durch den Hebel 6 und die Lasche 5 nach unten gedrückt, so daß das Saugrohr-Oberteil von der Gießkammer 8 abgefahren wird. In der unteren Stellung des Betätigungshebels 6, in der die Verriegelungsbolzen 22 eine Lageverriegelung des Führungsgestells 10 relativ zu den Führungsblöcken 20 bewirken, wird dann der Arretierbolzen 15 geöffnet und die Halteplatte -11 um die Verschwenkachse 13 ausgeschwenkt, wie dies in Fig. 2 gezeigt ist. Das Saugrohr 12 wird gemeinsam mit der Halteplatte 11 abgeschwenkt und kann nun aus der Elektroheizung 14 herausgezogen bzw. ein neues Saugrohr 12 eingesetzt werden.When removing the suction pipe 12, the guide frame 10 is by the lever 6 and the tab 5th pressed down so that the upper part of the intake manifold is moved away from the casting chamber 8. In the lower position of the actuating lever 6, in which the locking bolts 22 cause the guide frame 10 to be locked in position relative to the guide blocks 20, the locking bolt 15 is then opened and the holding plate -11 is pivoted out about the pivot axis 13, as shown in FIG. 2 . The suction pipe 12 is pivoted together with the holding plate 11 and can now be pulled out of the electric heater 14 or a new suction pipe 12 can be inserted.

Nach dem Einsetzen eines neuen Saugrohrs läuft der Vorgang umgekehrt ab, d.h. es wird die Halteplatte 11 wieder zurückgeschwenkt, bis sie zur Anlage an den Verriegelungsbolzen 15 kommt, der dann in seine Verriegelungsstellung gebracht wird. Anschließend wird die Lagearretierung des Führungsgestelles 10 durch Herausziehen der Arretierstifte 22 aus den Aufnahmebohrungen 21 aufgehoben, wonach das Führungsgestell 10 selbsttätig unter der Kraft der zusammengedrückten Gasfeder 4 solange angehoben wird, bis das obere Ende des Saugrohres 12 gegen die Einlaßöffnung an der Gießkammer 8 angedrückt ist. In dieser Stellung wird das Führungsgestell 10 unter der dann noch wirkenden Vorspannung der Gasfeder 4 gehalten (Ankoppelstellung, Arbeitsstellung).After inserting a new intake manifold, the process is reversed, i.e. the holding plate 11 is pivoted back again until it comes into contact with the locking bolt 15, which is then brought into its locking position. Then the position of the guide frame 10 is released by pulling the locking pins 22 out of the mounting holes 21, after which the guide frame 10 is automatically raised under the force of the compressed gas spring 4 until the upper end of the suction tube 12 is pressed against the inlet opening on the casting chamber 8 . In this position, the guide frame 10 is held under the pre-tensioning of the gas spring 4 (coupling position, working position).

Claims (9)

1. Device for attaching a suction tube (12) to the casting chamber (8) of a vacuum die casting machine including a guide frame which has a mounting plate (11) which removably supports the upper end of the suction tube (12) and which is mounted so as to be longitudinally movable with it between a coupling position, in which the suction tube (12) is connected to the insertion opening of the fixed casting chamber, and a decoupling position, in which the upper end of the suction tube (12) is spaced from the insertion opening of the casting chamber (8), and is pressed in the coupling position towards the insertion opening of the casting chamber (8), characterised in that a spring element (4) is provided for applying the pressure of the suction tube (12) against the casting chamber (8) in the coupling position, which spring element constantly urges the guide frame (10) in the direction towards its coupling position, even in the decoupled state and that in the decoupled state the mounting plate (11) may be swung out laterally together with the upper end of the suction tube (12) with respect to the guide frame (10).
2. Device as claimed in claim 1, characterised in that the guide frame (10) may be locked in its decoupling position,
3. Device as claimed in claim 1 or 2, characterised in that in its central region the mounting plate (11) supports the suction tube (12) whilst at its two end regions it is fastened to the lower end of a respective one of two guide members (2) which are mounted perpendicular to it and parallel to one another on both sides of the casting chamber (8) and by means of which it is movable towards the casting chamber (8) and away from it and that it is fastened to the end of the one guide member (2) via a pivotal joint (13) and to the end of the other guide member (2) by means of a releasable lock (15).
4. Device as claimed in claim 3, characterised in that at their other ends above the casting chamber (8) the two guide members (2) are connected together by two transverse plates (1) mounted respectively perpendicular to them and secured in their central region to a support sleeve (3), whereby the support sleeve (3) extends through both transverse plates (1) and has an internal space (17) in which the spring element (4) is supported with its lower end on an engagement surface (18) at the top of the casting chamber (8) and with its upper end at the end of the internal space (17) in the support sleeve (3), and that at its upper end the support sleeve (3) is pivotally connected to an actuating lever (6) pivotally secured to the die casting machine.
5. Device as claimed in claim 3 or 4, characterised in that the guide members (2) have lateral guide bars (19) which are received in a movable and form- locking manner in guide blocks (20) which are connectable to the die casting machine.
6. Device as claimed in claim 5, characterised in that receiving bores (21) for locking pegs (22) are provided along the length of the guide bars (19) and a corresponding engagement surface (23) for locking pegs (20) which may be inserted in the bores (21) is provided on the upper and/or lower surface of each guide block (20).
7. Device as claimed in one of claims 1 to 6, characterised in that a gas spring (4) is provided as the spring element in the guide frame (10).
8. Device as claimed in claim 7 and one of claims 3 to 6, characterised in that the cross-section of the gas spring (4) is smaller than the cross-section of the internal space (17) in the support sleeve (3) and the gas spring (4) is pivotally secured at its upper end to the support sleeve (3) by means of a transverse pivot (24).
9. Device as claimed in one of claims 3 to 8, characterised in that an electric heater (14) is secured to the mounting plate (11) which surrounds the upper end region of the suction tube (12) and into which, in the decoupling position, the suction tube (12) may be inserted and withdrawn from it.
EP87105123A 1987-04-07 1987-04-07 Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine Expired - Lifetime EP0285687B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8787105123T DE3764263D1 (en) 1987-04-07 1987-04-07 DEVICE FOR ATTACHING A SUCTION PIPE TO THE CASTING CHAMBER OF A VACUUM PRESSURE CASTING MACHINE.
EP87105123A EP0285687B1 (en) 1987-04-07 1987-04-07 Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine
AT87105123T ATE55295T1 (en) 1987-04-07 1987-04-07 DEVICE FOR ATTACHING A SUCTION PIPE TO THE CASTING CHAMBER OF A VACUUM DIE CASTING MACHINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87105123A EP0285687B1 (en) 1987-04-07 1987-04-07 Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine

Publications (2)

Publication Number Publication Date
EP0285687A1 EP0285687A1 (en) 1988-10-12
EP0285687B1 true EP0285687B1 (en) 1990-08-08

Family

ID=8196904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105123A Expired - Lifetime EP0285687B1 (en) 1987-04-07 1987-04-07 Device for attaching a suction tube to the casting chamber of a vacuum die-casting machine

Country Status (3)

Country Link
EP (1) EP0285687B1 (en)
AT (1) ATE55295T1 (en)
DE (1) DE3764263D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123464A1 (en) * 1991-07-16 1993-01-21 Audi Ag METHOD FOR OPERATING A DIE CASTING MACHINE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112343A (en) * 1935-07-03 1938-03-29 Lester Engineering Co Pressure casting machine
US2837792A (en) * 1953-09-24 1958-06-10 Ring Aluminum Dev Company Die casting machine
US2837794A (en) * 1956-01-23 1958-06-10 Ring Aluminum Dev Company Die casting machine

Also Published As

Publication number Publication date
ATE55295T1 (en) 1990-08-15
DE3764263D1 (en) 1990-09-13
EP0285687A1 (en) 1988-10-12

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