EP0414220A2 - Procédé et dispositif de prélèvement d'une façon dosée d'un métal liquide à partir d'un récipient pour métal liquide - Google Patents

Procédé et dispositif de prélèvement d'une façon dosée d'un métal liquide à partir d'un récipient pour métal liquide Download PDF

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Publication number
EP0414220A2
EP0414220A2 EP19900116081 EP90116081A EP0414220A2 EP 0414220 A2 EP0414220 A2 EP 0414220A2 EP 19900116081 EP19900116081 EP 19900116081 EP 90116081 A EP90116081 A EP 90116081A EP 0414220 A2 EP0414220 A2 EP 0414220A2
Authority
EP
European Patent Office
Prior art keywords
ladle
melt
scoop
bath level
moved
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.)
Withdrawn
Application number
EP19900116081
Other languages
German (de)
English (en)
Other versions
EP0414220A3 (en
Inventor
Georg Bilz
Hans Lämmermann
Wilhelm Hertlein
Winfried Grabietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novelis Deutschland GmbH
Original Assignee
Alcan Deutschland 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 Alcan Deutschland GmbH filed Critical Alcan Deutschland GmbH
Publication of EP0414220A2 publication Critical patent/EP0414220A2/fr
Publication of EP0414220A3 publication Critical patent/EP0414220A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume

Definitions

  • the invention relates to a method and a device for the metered removal of different volumes of liquid metal from a melt container with fluctuating bath level and transfer of the metal to a casting device by means of a ladle open on one side, according to the preamble of claim 1 and claim 13.
  • a relatively precisely metered volume of liquid metal is to be removed from a holding crucible for casting each mold, to be transferred to the mold and to be emptied there into the pouring funnel of the mold.
  • the removal and pouring is carried out by hand using a trowel or a spoon.
  • the caster immerses the trowel attached to the end of a handle bar with the edge into the melt and turns the trowel under the bath level in such a way that a metal volume determined by the depth of immersion is pricked out of the melt.
  • the foundry then lifts the ladle with the opening in a horizontal position out of the bath, carries it to the mold and empties it there by rotating it over the spout.
  • This traditional method requires heavy manual work and depends on the skill and the precise way the foundry works.
  • the caster Since the volume required for each work step cannot be dosed with the necessary accuracy during the scooping process, the caster usually takes a larger volume and pours the remainder remaining in the trowel after filling the mold into the melt pool. This procedure leads to turbulence and foaming in the melt in the holding crucible when the trowel is poured off.
  • a method corresponding to the preamble of claim 1 and a device corresponding to the preamble of claim 13 is known from DE-OS 28 04 381.
  • a ladle is dipped into the melt to a defined depth with the aid of probes from a defined waiting position above the bath level in order to record the melting volume with the bottom of the spoon.
  • This causes melt to flow over the edge of the spoon into the spoon cavity, causing turbulence.
  • the ladle is then lifted out of the melt and stopped in a precisely set inclined position just above the bathroom mirror. Except for the desired volume, superfluous melt runs like a waterfall back into the melt in the holding crucible, which again creates turbulence and creates foam.
  • the object of the present invention is to develop a method and a device of the type specified in the preamble of claim 1 and claim 13 such that turbulence and foaming both in the ladle and on the surface of the metal bath are practically completely avoided with rapid operation.
  • the object is achieved in that the melt volume located within the scoop during the filling process is kept essentially unchanged and the position of the melt remaining in the holding crucible is essentially unchanged.
  • the object is achieved according to the invention in that the ladle is moved from a defined stop position close to the surface of the bathroom with its open side towards the bathroom in such a way that it rotates relative to the bathroom by a pure 180 ° rotation executes the virtual - or actual - axis at rest, running in the bucket center plane, with one side of its opening edge penetrating the bath approximately vertically and rotating without horizontal displacement in the bath, so that at the end of the rotary movement it is filled with melt with its opening points upwards in the bathroom, from which it can be lifted by moving its holder and then transferred to the casting station.
  • This method of scooping ensures that, despite the immersion by the ladle, which is inevitable for the removal of the metal volume, practically no horizontal movement component is imparted, so that the melt in the holding crucible itself rests during the removal process and is not disturbed by turbulent metal flows. Because of the method of operation according to the invention, only two practically resting metal volumes separated from one another by the bucket wall are ultimately formed in the holding crucible and the volume in the tray cavity is dormantly extracted from the volume remaining in the holding crucible without relevant turbulence. Through the piercing of the scoop according to the invention and its rotary movement, even the oxide skin present on the bath level is cut out through the spoon rim without swirling and is taken up in the spoon cavity.
  • the scooping process itself is largely free of foam formation because the melt is hardly moved when the desired volume is cut out.
  • the definition of a stop position makes it easy to set the dosing quantity, since for a given spoon size this is determined by the height of the stop position above the bath surface and can be exactly maintained with every scoop.
  • the method of holding the spoon by a horizontal distance during the dipping process has the advantage that even with such a construction, the part of the dipper immersed in the bathroom is relative to the bathroom performs pure rotational movement and experiences practically no linear horizontal movement component, so that the unwanted movement or swirling of the molten metal is prevented.
  • Claims 14 to 20 contain advantageous developments of the device according to the invention.
  • the bucket mechanism 4 can have a conventional hydraulic, pneumatic or electric drive on conventional running gear and further comprises a control device (not shown in FIG. 1) for controlling all movements in all spatial axes as well as the rotating or pivoting movement of the ladle 2 .
  • the device 1 also has a probe 5, which is attached to the spoon mechanism 4 and interacts with the control device or a pulse generator thereof when the bathing surface is touched by triggering a signal.
  • Fig. 1 also shows a holding crucible 6, in which a molten metal 7 is contained.
  • the bath mirror which has an oxide skin, is marked with 8.
  • the holding crucible 6 can be designed in the usual way.
  • the ladle 2 is rotatably mounted on the holder 3 via its spout 9.
  • Fig. 1 shows a stop position of the ladle 2 shown in solid lines, in which it is moved slowly after taking an intermediate position.
  • the scoop 2 is lowered into the intermediate position at high speed until the scoop 2 has been moved so far into the holding crucible 6 that the probe 5 touches the bath level 8 and thereby triggers a signal through which a pulse generator (not shown) of the drive and control device is switched on, which controls the further lowering of the scoop 2 at a slow speed to the exactly predetermined position shown in FIG. 1 above the bath level 8 and stops there.
  • the ladle 2 in the illustrated embodiment of the device 1 according to the invention is pivoted via its spout 9 such that it punctures the melt 7 with the edge 10 opposite the spout 9.
  • the ladle 2 is moved horizontally with its holder 3 in such a way that the part of the ladle 2 immersed in the melt experiences practically no linear horizontal movement component relative to the melt.
  • the ladle 2 behaves during its pivoting movement as if its axis of rotation were approximately at the level of the bath level and ran in the central plane of the ladle.
  • FIG. 2 shows the individual pivot positions of the scoop 2 and the corresponding horizontal position of the holder 3.
  • the scoop 2 After the scoop 2 has carried out its rotating scoop movement, it emerges from the melt 7 again at the end of the scoop movement with its opening 11 facing upwards.
  • This position is indicated in Fig. 1 by dash-dotted lines of the ladle 2 and the holder 3. From this illustration it can also be seen that the holder 3 has traversed a horizontal movement path, the length of which approximately corresponds to the scoop diameter.
  • the scoop 2 From this last-mentioned end position, in which the scoop 2 has removed the desired volume from the holding crucible 6, the scoop 2 can be moved in a conventional manner to a mold and emptied there.
  • the bucket drive can be designed as a pure rotary drive, which can be operated in both directions of rotation without limitation of the angle of rotation.
  • the scoop edge 10 is formed by the edge of the scoop 2 opposite the spout 9.
  • the spout 9 is designed such that the quietest possible emptying is achieved when tipping over the horizontal axis.
  • the emptying speed can be controlled according to the requirements of the mold in the course of the casting process according to a predetermined program.
  • the movement of the spoon holder can take place in such a way that several molds and / or crucibles are alternately approached.
  • the scoop 2 is supported via a horizontal axis lying in the region of its snout 9, it is generally also possible to design the scoop 2 in the form of a spherical cap which is arranged around a horizontal, the Swivel axis encompassing ball center is rotatable. In such a case, the horizontal movement of the holder of the scoop can advantageously be omitted without undesired turbulence occurring in the melt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP19900116081 1989-08-23 1990-08-22 Method and device for withdrawing measured quantities of molten metal from a molten metal holding vessel Withdrawn EP0414220A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3927852 1989-08-23
DE3927852A DE3927852A1 (de) 1989-08-23 1989-08-23 Verfahren und vorrichtung zur dosierten entnahme fluessigen metalls aus einem schmelzebehaelter

Publications (2)

Publication Number Publication Date
EP0414220A2 true EP0414220A2 (fr) 1991-02-27
EP0414220A3 EP0414220A3 (en) 1992-04-08

Family

ID=6387713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900116081 Withdrawn EP0414220A3 (en) 1989-08-23 1990-08-22 Method and device for withdrawing measured quantities of molten metal from a molten metal holding vessel

Country Status (7)

Country Link
US (1) US5131452A (fr)
EP (1) EP0414220A3 (fr)
CA (1) CA2023891A1 (fr)
DD (1) DD297350A5 (fr)
DE (1) DE3927852A1 (fr)
PT (1) PT95084A (fr)
TR (1) TR25110A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19847700B4 (de) * 1998-10-16 2006-04-27 Abb Patent Gmbh Verfahren und Einrichtung zum Aufnehmen von flüssigem Metall mit einem Gießlöffel
US6779585B2 (en) 2002-09-25 2004-08-24 Honda Giken Kogyo Kabushiki Kaisha Method for controlling ladle motion to reduce aluminum oxide formation
DE20308509U1 (de) 2003-05-30 2003-08-07 ROBOTEC Engineering GmbH, 79713 Bad Säckingen Gießvorrichtung für die Schwerkraft-Gießtechnik
US7025115B2 (en) * 2004-08-11 2006-04-11 General Motors Corporation Ladle for molten metal
TW201408398A (zh) * 2012-08-23 2014-03-01 游家龍 供應鋁合金熔融液的方法及裝置
US11027333B2 (en) * 2019-03-22 2021-06-08 Sukhjinder Kullar Liquid-resistant direct-drive robotic ladler
AT523251A1 (de) * 2019-12-13 2021-06-15 Fill Gmbh Verfahren zum Gießen von Schmelze mittels eines Schmelzebehälters in welchem ein Schmelzeaufnahmeraum ausgebildet ist

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2064734A (en) * 1935-01-28 1936-12-15 William L Crawford Flat stereotype metal distributor
US3556354A (en) * 1968-04-30 1971-01-19 Respond Inc Ladle trap chamber and tilting dispenser
US3774815A (en) * 1972-10-30 1973-11-27 J Mccarthy Mechanical ladle mechanism having four-bar configuration
DE2614416A1 (de) * 1975-04-03 1976-11-04 Ryobi Ltd Automatische metallschmelzenspeisevorrichtung
US4155400A (en) * 1977-10-31 1979-05-22 Mcneil Corporation Ladle for and method of tilting about two axes for pouring
DE2804381A1 (de) * 1978-02-02 1979-08-09 Wilfried Ing Grad Dobe Verfahren und vorrichtung zur dosierten entnahme von fluessigem metall aus einem schmelzebehaelter
IT1121027B (it) * 1979-09-17 1986-03-26 Fataluminium Spa Macchina per la colata di leghe leggere
DE3017807C2 (de) * 1980-05-09 1983-12-08 Otto Dipl.-Ing. 5778 Meschede Bolland Pneumatischer Antrieb für den Schöpf- und Gießlöffel von Dosiereinrichtungen
FR2505218A1 (fr) * 1981-05-08 1982-11-12 Renault Dispositif de suspension et de commande pour une poche de coulee
US4558421A (en) * 1983-06-09 1985-12-10 Yellowstone, Ltd. Control system for an automatic ladling apparatus
IN161256B (fr) * 1983-06-09 1987-10-31 Rimrock Corp
DE3412126A1 (de) * 1984-03-31 1985-10-10 Clemens-A. Dipl.-Ing. 5600 Wuppertal Verbeek Verfahren und einrichtung zum restfreien herstellen frei gewaehlter schmelzmengen
DE3420415A1 (de) * 1984-06-01 1985-12-05 Clemens-A. Dipl.-Ing. 5600 Wuppertal Verbeek Dosiergeraet fuer metallische schmelzen

Also Published As

Publication number Publication date
DE3927852A1 (de) 1991-02-28
EP0414220A3 (en) 1992-04-08
DD297350A5 (de) 1992-01-09
TR25110A (tr) 1992-11-01
US5131452A (en) 1992-07-21
CA2023891A1 (fr) 1991-02-24
PT95084A (pt) 1992-04-30
DE3927852C2 (fr) 1992-01-02

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