EP0137103B1 - Hand operated mechanism for ladle sliding gate - Google Patents

Hand operated mechanism for ladle sliding gate Download PDF

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Publication number
EP0137103B1
EP0137103B1 EP84106295A EP84106295A EP0137103B1 EP 0137103 B1 EP0137103 B1 EP 0137103B1 EP 84106295 A EP84106295 A EP 84106295A EP 84106295 A EP84106295 A EP 84106295A EP 0137103 B1 EP0137103 B1 EP 0137103B1
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EP
European Patent Office
Prior art keywords
crank
slider
push
slider plate
pull
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
Application number
EP84106295A
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German (de)
French (fr)
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EP0137103A1 (en
Inventor
Josef Lothmann
Leo Löhrer
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Zimmermann and Jansen GmbH
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Zimmermann and Jansen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zimmermann and Jansen GmbH filed Critical Zimmermann and Jansen GmbH
Priority to AT84106295T priority Critical patent/ATE24852T1/en
Publication of EP0137103A1 publication Critical patent/EP0137103A1/en
Application granted granted Critical
Publication of EP0137103B1 publication Critical patent/EP0137103B1/en
Expired legal-status Critical Current

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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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/38—Means for operating the sliding gate

Definitions

  • the invention relates to a manual actuation mechanism for a ladle slide closure, with a push and pull rod displacing the slide plate, which is articulated to a slide plate carrier and a push and pull crank which can be rotated by means of an actuating rod.
  • a difficulty with such manually operated ladle slide closures is that the mutually movable parts in both end positions, i. H. in the open position and in the closed position, stick together by adhering solidifying metal and can therefore only be set in motion with great effort.
  • the slide plate can be moved relatively easily.
  • attempts have been made in the prior art to extend the actuating rod so that a longer lever arm is available for turning the crank.
  • an excessively long actuating rod is difficult to handle and cannot be operated properly due to the limited space.
  • the invention proposes, starting from a manual actuation mechanism of the type mentioned at the outset, that the push and pull crank can be rotated by at least 180 °, the displacement path of the slide plate and the angle of rotation of the crank being matched to one another such that the full open position and the full closed position of the slide plate coincide with the two dead centers of the crank mechanism.
  • the invention cleverly uses the fact that with a crank mechanism in the dead center area the stroke goes to zero and the lifting force is theoretically infinitely large. In this way it is possible to provide a very large actuating force for the initial movement of the slide plate from the open or closed position without the actuating lever needing to be excessively long.
  • an expedient development of the invention provides that the actuating rod can be inserted into two angularly offset insertion openings assigned to the crank. In this way, it is possible to divide the angular path of the crank into two sections, although the actuating rod must be moved from the first insertion opening into the second insertion opening. For the movement of the slide plate from the intermediate position which it assumes when the actuating rod is repositioned, no particularly large actuating forces are required because, during the short repositioning time, parts which move against one another cannot solidify due to solidifying metal.
  • the angular offset between the two insertion openings is suitably 70 ° to 110 °. In this angular range, the ergonomically most favorable method of actuation results both for pivoting and for repositioning the actuating rod.
  • the invention provides that the passage opening of the slide closure, viewed in the direction of displacement, is made smaller on the upper side of the slide plate than on the underside thereof, and that the first insertion opening of the crank is fitted such that the slide plate is closed at the end of the first when the slide closure is closed
  • Actuating path shuts off the smaller passage opening on the top of the slide plate and leaves the larger passage opening on the underside of the slide plate still open.
  • the slide plate of the three-plate The slide lock can in no case be closed in one go, so that it is excluded with certainty that liquid metal remains in the passage opening of the slide plate.
  • the slide closure is designated in its entirety with the reference number 1. It is arranged in a known manner on the bottom of a ladle 2 and has a top plate 3, a slide plate 4, a support plate 5 and an outlet sleeve 6.
  • the slide plate 4 is fastened in a slide plate carrier 7, which is slidably mounted in the housing 8 of the slide closure 1.
  • a push and pull rod 9 is used, which is cranked in the length range and is articulated both on the slide plate carrier 7 and also on a push and pull crank 10.
  • the push and pull crank 10 is rotatably mounted on a bolt 11 which is firmly connected to the ladle 2 by 180.
  • the push and pull rod 9 engages on the push and pull crank 10 at a distance from its axis of rotation.
  • crank mechanism 9, 10 formed by the push and pull crank 10 and the push and pull rod 9 is both in the open position of the slide closure (see FIG. 1) and in the closed position of the slide closure (see FIG. 3) at the two dead centers, so that when the push and pull crank 10 is rotated, a very large actuating force is initially applied by means of the actuating rod 14 inserted into the insertion openings 12 and 13, respectively.
  • the passage opening 15 of the slide closure is smaller on the upper side of the slide plate 4 than on the underside thereof. Furthermore, the first insertion opening 13 of the crank is arranged so that the slide plate 4 closes the small passage opening at the top of the slide plate 4 when the slide closure is closed at the end of the first actuation path and leaves the larger passage opening on the underside of the slide plate 4 still open.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Transmission Devices (AREA)

Abstract

1. A hand actuating mechanism for a casting ladle slider-type closure means (1), comprising a push-pull bar (9) for displacing the slider plate (4), which bar (9) is pivotally connected to a slider plate carrier (7) and a push-pull crank (10) which is rotatable by meankans of an actuating bar (14), characterised in that the push-pull crank (10) is rotatable through at least 180 degrees wherein the sliding travel movement of the slider plate (4) and the angle of rotation of the push-pull crank (10) are so matched to each other that the fully open position and the fully closed position of the slider plate (4) coincide with the two dead centre points of the crank drive (9, 10).

Description

Die Erfindung betrifft einen Handbetätigungsmechanismus für einen Gießpfannenschieberverschluß, mit einer die Schieberplatte verschiebenden Schub- und Zugstange, die gelenkig mit einem Schieberplattenträger und einer Schub- und Zugkurbel verbunden ist, welche mittels einer Betätigungsstange verdrehbar ist.The invention relates to a manual actuation mechanism for a ladle slide closure, with a push and pull rod displacing the slide plate, which is articulated to a slide plate carrier and a push and pull crank which can be rotated by means of an actuating rod.

Handbetätigte Gießpfannenschieberverschlüsse werden insbesondere in Eisengießereien verwendet, wo es aufgrund der beengten Raumverhältnisse in der Gießhalle-nur schlecht möglich ist, dem Schieberverschluß Betätigungsenergie in Form von Druckmitteldruck zuzuführen. Bei nach dem Stande der Technik DE-A- 3 007 758 bekannten handbetätigten Gießpfannenschieberverschlüssen wird für die Schließ- bzw. Offnungsbewegung der Schieberplatte die Schub- und Zugkurbel mit Hilfe der Betätigungsstange um einen Winkel von go verdreht.Manually operated ladle slide gate closures are used particularly in iron foundries, where it is difficult to supply actuation energy in the form of pressure medium pressure to the gate closure due to the limited space in the foundry. In the prior art DE-A-3 007 758 known manually operated ladle slide valve closures for the closing or opening movement of the slide plate, the push and pull crank is rotated by an angle of go using the actuating rod.

Eine Schwierigkeit bei derartigen handbetätigten Gießpfannenschieberverschlüssen besteht darin, daß die gegeneinander beweglichen Teile in beiden Endstellungen, d. h. in der Öffnungsstellung und in der Schließstellung, durch anhaftendes erstarrendes Metall verkleben und deshalb nur mit großem Kraftaufwand in Bewegung gesetzt werden können. Ist der Anfangswiderstand hingegen überwunden, läßt sich die Schieberplatte verhältnismäßig leicht bewegen. Um für den Bewegungsbeginn eine möglichst große Kraft erzeugen zu können, ist nach dem Stande der Technik versucht worden, die Betätigungsstange zu verlängern, so daß für das Verdrehen der Kurbel eine längerer Hebelarm zur Verfügung steht. Dem sind jedoch Grenzen gesetzt, weil eine überlange Betätigungsstange schwer zu handhaben ist und aufgrund der beengten Raumverhältnisse nicht einwandfrei betätigt werden kann.A difficulty with such manually operated ladle slide closures is that the mutually movable parts in both end positions, i. H. in the open position and in the closed position, stick together by adhering solidifying metal and can therefore only be set in motion with great effort. However, if the initial resistance is overcome, the slide plate can be moved relatively easily. In order to be able to generate the greatest possible force for the beginning of the movement, attempts have been made in the prior art to extend the actuating rod so that a longer lever arm is available for turning the crank. However, there are limits to this because an excessively long actuating rod is difficult to handle and cannot be operated properly due to the limited space.

Es ist deshalb Aufgabe der Erfindung, den Handbetätigungsmechanismus der eingangsgenannten Art dahingehend weiterzubilden, daß jeweils für den Beginn der Bewegung aus der Öffnungsstellung bzw. Schließstellung heraus sehr große Kräfte zur Verfügung stehen, ohne daß die Betätigungsstange übermäßig verlängert werden muß.It is therefore an object of the invention to develop the manual actuation mechanism of the type mentioned in such a way that very large forces are available in each case for the start of the movement from the open position or closed position without the actuating rod having to be excessively extended.

Zur Lösung dieser Aufgabe schlägt die Erfindung ausgehend von einem Handbetätigungsmechanismus der eingangsgenannten Art vor, daß die Schub- und Zugkurbel um mindestens 180° verdrehbar ist, wobei der Verschiebeweg der Schieberplatte und der Verdrehwinkel der Kurbel so aufeinander abgestimmt sind, daß die volle Öffnungsstellung und die volle Schließstellung der Schieberplatte mit den beiden Totpunkten des Kurbeltriebes zusammenfallen.To achieve this object, the invention proposes, starting from a manual actuation mechanism of the type mentioned at the outset, that the push and pull crank can be rotated by at least 180 °, the displacement path of the slide plate and the angle of rotation of the crank being matched to one another such that the full open position and the full closed position of the slide plate coincide with the two dead centers of the crank mechanism.

Die Erfindung nutzt auf geschickte Art und Weise die Tatsache, daß bei einem Kurbeltrieb im Bereich der Totpunkte der Hub gegen Null geht und die Hubkraft theoretisch unendlich groß wird. Auf diese Weise ist es möglich, für die Anfangsbewegung der Schieberplatte aus der Öffnungs- bzw. Schließstellung heraus eine sehr große Betätigungskraft zur Verfügung zu stellen, ohne daß der Betätigungshebel übermäßig lang zu sein braucht.The invention cleverly uses the fact that with a crank mechanism in the dead center area the stroke goes to zero and the lifting force is theoretically infinitely large. In this way it is possible to provide a very large actuating force for the initial movement of the slide plate from the open or closed position without the actuating lever needing to be excessively long.

Da aufgrund der Platzverhältnisse eine Verschwenkung der Kurbel um 180° in einem Zuge nur schwer zu bewerkstelligen ist, sieht eine zweckmäßige Weiterbilddung der Erfindung vor, daß die Betätigungsstange in zwei der Kurbel zugeordnete, winkelversetzte Einstecköffnungen einsteckbar ist. Auf diese Weise ist es möglich, den Winkelweg der Kurbel in zwei Abschnitte zu unterteilen, wobei allerdings die Betätigungsstange von der ersten Einstecköffnung in die zweite Einstecköffnung umgesteckt werden muß. Für die Bewegung der Schieberplatte aus der Zwischenstellung heraus, die sie beim Umstecken der Betätigungsstange einnimmt, sind keine besonders großen Betätigungskräfte erforderlich, weil während der kurzen Umsteckzeit ein Verkleben der gegeneinander beweglichen Teile durch erstarrendes Metall nicht eintreten kann.Since a swiveling of the crank by 180 ° in one go is difficult to accomplish due to the available space, an expedient development of the invention provides that the actuating rod can be inserted into two angularly offset insertion openings assigned to the crank. In this way, it is possible to divide the angular path of the crank into two sections, although the actuating rod must be moved from the first insertion opening into the second insertion opening. For the movement of the slide plate from the intermediate position which it assumes when the actuating rod is repositioned, no particularly large actuating forces are required because, during the short repositioning time, parts which move against one another cannot solidify due to solidifying metal.

Der Winkelversatz zwischen den beiden Einstecköffnungen beträgt zweckmäßig 70° bis 110°. In diesem Winkelbereich ergibt sich die ergonomisch günstigste Betätigungsweise sowohl für das Verschwenken als auch für das Umstecken der Betätigungsstange.The angular offset between the two insertion openings is suitably 70 ° to 110 °. In this angular range, the ergonomically most favorable method of actuation results both for pivoting and for repositioning the actuating rod.

Durch das Umstecken der Betätigungsstange ergibt sich im Ablauf des Schließvorfanges zwangsläufig eine Pause, die man erfindungsgemäß dafür nutzen kann, bei einem Dreiplatten-Schieberverschluß die Durchtrittsöffnung in der Schieberplatte leerlaufen zu lassen. Zu diesem Zweck sieht die Erfindung vor, daß die Durchtrittsöffnung des Schieberverschlusses in Verschieberichtung gesehen an der Oberseite der Schieberplatte kleiner als an deren Unterseite ausgebildet ist und daß die erste Einstecköffnung der Kurbel so angebracht ist, daß die Schieberplatte beim Schließen des Schieberverschlusses am Ende des ersten Betätigungsweges die kleinere Durchtrittsöffnung an der Oberseite der Schieberplatte absperrt und die größere Durchtrittsöffnung an der Unterseite der Schieberplatte noch offen läßt.By repositioning the actuating rod, there is inevitably a pause in the course of the closing start, which can be used according to the invention to allow the passage opening in the slide plate to run empty in the case of a three-plate slide closure. For this purpose, the invention provides that the passage opening of the slide closure, viewed in the direction of displacement, is made smaller on the upper side of the slide plate than on the underside thereof, and that the first insertion opening of the crank is fitted such that the slide plate is closed at the end of the first when the slide closure is closed Actuating path shuts off the smaller passage opening on the top of the slide plate and leaves the larger passage opening on the underside of the slide plate still open.

Auf diese Weise wird sichergestellt, daß das in der Durchtrittsöffnung der Schieberplatte befindliche Metall während der Umsteckpause auslaufen kann, so daß verhindert wird, daß dieses Metall in der Öffnung einfriert, während der Schieberverschluß sich in der Schließstellung befindet. Die zuletzt erläuterte Ausführungsform der Erfindung hat den besonderen Vorteil, daß aufgrund der konstruktiven Merkmale Fehlbedienungen praktisch ausgeschlossen werden. Die Schieberplatte des Dreiplatten-Schieberverschlusses kann nämlich auf keinen Fall in einem Zuge geschlossen werden, so daß es mit Sicherheit ausgeschlossen ist, daß flüssiges Metall in der Durchtrittsöffnung der Schieberplatte verbleibt.In this way it is ensured that the metal located in the passage opening of the slide plate can leak during the changeover, so that this metal is prevented from freezing in the opening while the slide closure is in the closed position. The last-described embodiment of the invention has the particular advantage that incorrect operations are practically excluded due to the design features. The slide plate of the three-plate The slide lock can in no case be closed in one go, so that it is excluded with certainty that liquid metal remains in the passage opening of the slide plate.

Ein Ausführungsbeispiel der Erfindung wird im folgenden an Hand der Zeichnung erläutert. Es zeigen:

  • Fig. 1 schematisch eine Seitenansicht des Schieberverschlusses mit Handbetätigungsmechnismus gemäß der Erfindung in der Öffnungsstellung,
  • Fig. 2 den in Fig. 1 dargestellten Schieberverschluß in der Zwiscbenstellung,
  • Fig. B den in Fig. 1 dargestellten Schieberverschluß in der Schließstellung.
An embodiment of the invention is explained below with reference to the drawing. Show it:
  • 1 schematically shows a side view of the slide closure with manual actuation mechanism according to the invention in the open position,
  • 2 shows the slide closure shown in FIG. 1 in the intermediate position,
  • Fig. B the slide closure shown in Fig. 1 in the closed position.

In der Zeichnung ist der Schieberverschluß in seiner Gesamtheit mit dem Bezugszeichen 1 bezeichnet. Er ist in bekannter Weise am Boden einer Gießpfanne 2 angeordnet und weist eine Kopfplatte 3, eine Schieberplatte 4, eine Stützplatte 5 und eine Auslaufhülse 6 auf. Die Schieberplatte 4 ist in einem Schieberplattenträger 7 befestigt, der in dem Gehäuse 8 des Schieberverschlusses 1 verschiebbar gelagert ist.In the drawing, the slide closure is designated in its entirety with the reference number 1. It is arranged in a known manner on the bottom of a ladle 2 and has a top plate 3, a slide plate 4, a support plate 5 and an outlet sleeve 6. The slide plate 4 is fastened in a slide plate carrier 7, which is slidably mounted in the housing 8 of the slide closure 1.

Zum Verschieben des Schieberplattenträgers 7 mit der Schieberplatte 4 dient eine Schub- und Zugstange 9, die im Längenbereich abgekröpft ausgebildet ist und sowohl an dem Schieberplattenträger 7 und auch an einer Schub- und Zugkurbel 10 gelenkig befestigt ist. Die Schub- und Zugkurbel 10 ist an einem mit der Gießpfanne 2 fest verbundenen Bolzen 11 um 180 verdrehbar gelagert. Die Schub- und Zugstange 9 greift an der Schub- und Zugkurbel 10 mit Abstand zu deren Drehachse an. Zum Verdrehen der Schub- und Zugkurbel 10 ist diese mit zwei Einstecköffnungen 12 und 13 versehen, die um etwa 85 gegeneinander winkelversetzt angeordnet sind und zum Einstecken einer Betätigungsstange 14 dienen.To push the slide plate carrier 7 with the slide plate 4, a push and pull rod 9 is used, which is cranked in the length range and is articulated both on the slide plate carrier 7 and also on a push and pull crank 10. The push and pull crank 10 is rotatably mounted on a bolt 11 which is firmly connected to the ladle 2 by 180. The push and pull rod 9 engages on the push and pull crank 10 at a distance from its axis of rotation. To rotate the push and pull crank 10, it is provided with two insertion openings 12 and 13, which are arranged at an angle of about 85 from one another and are used for inserting an actuating rod 14.

Wie aus einem Vergleich der Fig. 1 und 3 erkennbar ist, befindet sich der von der Schubund Zugkurbel 10 und der Schub- und Zugstange 9 gebildete Kurbeltrieb 9, 10 sowohl in der Öffnungsstellung des Schieberverschlusses (siehe Fig. 1) als auch in der Schließstellung des Schieberverschlusses (siehe Fig. 3) an den beiden Totpunkten, so daß beim Verdrehen der Schub- und Zugkurbel 10 mittels der in die Einstecköffnungen 12 bzw. 13 eingesteckten Betätigungsstange 14 zunächst eine sehr große Betätigungskraft aufgebracht wird.As can be seen from a comparison of FIGS. 1 and 3, the crank mechanism 9, 10 formed by the push and pull crank 10 and the push and pull rod 9 is both in the open position of the slide closure (see FIG. 1) and in the closed position of the slide closure (see FIG. 3) at the two dead centers, so that when the push and pull crank 10 is rotated, a very large actuating force is initially applied by means of the actuating rod 14 inserted into the insertion openings 12 and 13, respectively.

Wie aus der Zeichnung weiterhin ersichtlich ist, ist die Durchtrittsöffnung 15 des Schieberverschlusses in Verschieberichtung gesehen an der Oberseite der Schieberplatte 4 kleiner als an deren Unterseite ausgebildet. Weiterhin ist die erste Einstecköffnung 13 der Kurbel so angeordnet, daß die Schieberplatte 4 beim Schließen des Schieberverschlusses am Ende des ersten Betätigungsweges die kleine Durchtrittsöffnung an der Oberseite der Schieberplatte 4 absperrt und die größere Durchtrittsöffnung an der Unterseite der Schieberplatte 4 noch offen läßt.As can also be seen from the drawing, the passage opening 15 of the slide closure, viewed in the direction of displacement, is smaller on the upper side of the slide plate 4 than on the underside thereof. Furthermore, the first insertion opening 13 of the crank is arranged so that the slide plate 4 closes the small passage opening at the top of the slide plate 4 when the slide closure is closed at the end of the first actuation path and leaves the larger passage opening on the underside of the slide plate 4 still open.

Auf diese Weise kann während des Schließvorganges in dieser Zwischenstellung während des Umsteckens der Betätigungsstange 14 in die Einstecköffnung 13 das in der Durchtrittsöffnung der Schieberplatte 4 verbliebene flüssige Metall auslaufen.

Figure imgb0001
In this way, the liquid metal remaining in the passage opening of the slide plate 4 can leak out during the closing process in this intermediate position while the actuating rod 14 is being moved into the insertion opening 13.
Figure imgb0001

Claims (4)

1. A hand actuating mechanism for a casting ladle slider-type closure means (1), comprising a push-pull bar (9) for displacing the slider plate (4), which bar (9) is pivotally connected to a slider plate carrier (7) and a push-pull crank (10) which is rotatable by meankans of an actuating bar (14), characterised in that the push-pull crank (10) is rotatable through at least 180° wherein the sliding travel movement of the slider plate (4) and the angle of rotation of the push-pull crank (10) are so matched to each other that the fully open position and the fully closed Eosition of the slider plate (4) coincide with the two dead centre points of the crank drive (9, 10).
2. A hand actuating mechanism according to claim 1 characterised in that the actuating bar (4) can be fitted into two angularly displaced fitting openings (12,13) associated with the crank (10).
3. A hand actuating mechanism according to claims 1 and 2 characterised in that the angle displacement between the two fitting openings is from 70 to 110°
4. A hand actuating mechanism according to one or more of claims 1 to 3 for use on a three- plate slider characterised in that the passage opening (15) of the slider-type closure means, as considered in the direction of sliding movement, is smaller at the top side of the slider plate (4) than at the underside thereof, and that the first fitting opening (12) of the crank is so arranged that, upon closure of the slider-type closure means, at the end of the first actuating travel, the slider plate closes off the smaller passage opening at the top side of the slider plate (4) and still leaves open the larger passage opening at the underside of the slider plate (4).
EP84106295A 1983-09-23 1984-06-01 Hand operated mechanism for ladle sliding gate Expired EP0137103B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106295T ATE24852T1 (en) 1983-09-23 1984-06-01 MANUAL ACTUATION MECHANISM FOR A LADLE SLATE CAP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3334438A DE3334438C1 (en) 1983-09-23 1983-09-23 Manual actuation mechanism for a ladle slide closure
DE3334438 1983-09-23

Publications (2)

Publication Number Publication Date
EP0137103A1 EP0137103A1 (en) 1985-04-17
EP0137103B1 true EP0137103B1 (en) 1987-01-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106295A Expired EP0137103B1 (en) 1983-09-23 1984-06-01 Hand operated mechanism for ladle sliding gate

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EP (1) EP0137103B1 (en)
AT (1) ATE24852T1 (en)
DE (1) DE3334438C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606686A1 (en) * 1996-02-22 1997-08-28 Zimmermann & Jansen Gmbh Slider closure for opening and closing the outlet channel of a casting vessel for metallic melts
FI120385B (en) * 2007-07-06 2009-10-15 Indref Oy Sealing mechanism for metering of metal melt and method for manufacturing a sealing mechanism

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US311902A (en) * 1885-02-10 Stopper for ladles
US2268482A (en) * 1940-05-04 1941-12-30 Harvey Robert Harold Ladle nozzle construction
DE2014331A1 (en) * 1970-03-25 1972-03-02 Didier Werke AG, 6200 Wiesbaden Slide closure on containers for liquid melt
GB1590775A (en) * 1977-02-17 1981-06-10 Flogates Ltd Sliding gate valves
GB2043217B (en) * 1979-03-02 1982-10-20 Flogates Ltd Spring device for sliding gate valve
IT1141818B (en) * 1980-09-05 1986-10-08 Sirma MANUAL CONTROL DEVICE FOR LADDLE DRAWER

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Publication number Publication date
ATE24852T1 (en) 1987-01-15
DE3334438C1 (en) 1984-07-12
EP0137103A1 (en) 1985-04-17

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