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EP2859972A1 - Procédé et dispositif de dépôt d'une quantité de dosage d'une matière en fusion - Google Patents

Procédé et dispositif de dépôt d'une quantité de dosage d'une matière en fusion Download PDF

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Publication number
EP2859972A1
EP2859972A1 EP20140186435 EP14186435A EP2859972A1 EP 2859972 A1 EP2859972 A1 EP 2859972A1 EP 20140186435 EP20140186435 EP 20140186435 EP 14186435 A EP14186435 A EP 14186435A EP 2859972 A1 EP2859972 A1 EP 2859972A1
Authority
EP
European Patent Office
Prior art keywords
measuring vessel
melt
container
amount
vessel
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Withdrawn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
EP20140186435
Other languages
German (de)
English (en)
Inventor
Ludger Greskötter
Peter Siwek
Ulrich Sommer
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.)
Strikowestofen GmbH
Original Assignee
Strikowestofen 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 Strikowestofen GmbH filed Critical Strikowestofen GmbH
Publication of EP2859972A1 publication Critical patent/EP2859972A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B22D39/023—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a displacement member
    • 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
    • B22D39/06—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal

Definitions

  • the invention relates to a method for dispensing a metered amount of a melt, in particular a molten metal, from a container according to the preamble of the main claim.
  • the invention also relates to a device for dispensing a metered amount of a melt, in particular a molten metal, according to the preamble of the independent claim.
  • melts especially molten metal such as zinc or aluminum
  • accurate and reliable but still simple metering of the melt is required.
  • a predetermined metered amount of the melt taken from a container or dispensed and then, for example, poured into a mold, such as a die-cast.
  • the discharge quantity of the melt exceeds a capacity of the measuring vessel defined by an overflow edge of the measuring vessel and predetermining the metering quantity, so that a portion of the melt exceeding the capacity flows out of the measuring vessel via the overflow edge.
  • the metered amount of the melt is discharged from the measuring vessel and forwarded for example via a feed chute, for example in a filling chamber of a die casting machine.
  • a feed chute for example in a filling chamber of a die casting machine.
  • the device proposed here for dispensing a predetermined metered quantity of a melt comprises a container for the melt, a measuring vessel and a metering tube, through which the melt from the container into the measuring vessel can be promoted and this typically extends from the container to the measuring vessel.
  • the apparatus further comprises a conveying device, which is set up to convey a predetermined discharge quantity of the melt from the container through the metering tube into the measuring vessel.
  • the proposed method as well as the proposed device are based on the idea of metering the dosage with the measuring vessel form-bound and for this purpose to fill the measuring vessel with the melt to its capacity, ie to its overflow edge. Since the predetermined discharge amount of the melt exceeds the capacity, namely the excess amount, the measuring vessel is always filled up to the overflow edge after the outflow of this excess melt, so that the measuring vessel always contains exactly the same amount of melt, namely the metered amount defined in this way. If the actual discharge quantity deviates from the specified discharge quantity, this deviation has no influence on the dimensioning of the metered quantity, as long as it is ensured that the actual discharge quantity is greater than the capacity of the measuring vessel. In order to ensure this, the given discharge quantity and the surplus quantity given to it can be sufficiently generous.
  • a reliable metering amount is ensured if the given discharge rate is greater than the capacity of the measuring vessel by at least 5% (for a relatively large dose) or at least 10% (for a relatively small dose) the excess amount is at least 5% or at least 10% of the capacity.
  • the given amount of discharge does not exceed the capacity by more than 50% of the capacity. This means that the predetermined excess amount is then no more than 50% of the capacity.
  • the dimension of the metered amount in this way is very simple and reliable feasible.
  • a measurement of the Melting height in the measuring cup can be dispensed with by means of a sensor and, if present, regulation of the conveying device can be considerably simplified.
  • the process is carried out cyclically, ie in recurrent working cycles, so that in each of these working cycles the predetermined discharge quantity is conveyed into the measuring vessel and the metered quantity is measured and dispensed.
  • the predetermined discharge amount is discharged into the measuring vessel in a single discharge stall.
  • the device can comprise a control unit or a control unit, which can then be set up in particular to control the conveyor device, to convey the predetermined discharge quantity of the melt into the measuring vessel.
  • control unit or control unit can be repeated automatically, so that the method is performed several times in automatically recurring working cycles.
  • the dosage of the melt can be drained from the measuring vessel by the measuring vessel is tilted, for example.
  • the metered amount of the melt can also be omitted from the measuring vessel by opening an outlet opening of the measuring vessel arranged below the overflow edge.
  • This opening can be done in a particularly simple manner by moving a closing element closing the outlet opening.
  • a sliding element serving as a closure element can be pushed away from the outlet opening or turned away or a plug can be removed from the outlet opening.
  • the outlet opening can be arranged, for example, in a bottom of the measuring vessel or as close as possible to the bottom of the measuring vessel in a side wall of the measuring vessel.
  • one of the side walls of the measuring vessel can be rotated or be slidably mounted, so that after a corresponding pushing away or turning away this side wall, the melt can flow out of the measuring cup as completely as possible.
  • the apparatus may comprise an outlet device, which is set up to discharge the metered quantity of the melt from the measuring vessel after the discharge of the melt into the measuring vessel has ended.
  • this outlet device which may for this purpose have corresponding formed parts, such as a joint (eg a hinge) for tilting the measuring vessel around this joint, a guide , a sliding bearing and / or a hinge (eg a hinge) for the closure element and / or a drive for tilting the measuring vessel or for moving the closure element, such as a motor or a pneumatic or hydraulic drive.
  • the outlet device is controllable by the control unit in order to achieve the greatest possible automation.
  • the timing of the discharge of the dosing amount from the measuring vessel can be reliably predefined.
  • the metered amount of the melt is not discharged from the measuring vessel, if after flowing out of the excess amount, the melt has evenly distributed in the measuring vessel under the action of gravity and a horizontal surface of the Melt has formed on a height defined by the overflow edge.
  • a sufficiently long waiting period beginning, for example, with the beginning of discharge of the melt into the measuring vessel
  • a sufficiently long waiting period can be maintained before the metered amount of the melt is discharged from the measuring vessel.
  • the outflow speed can be, for example, a given Filling speed of a mold, such as a die-casting machine, depend or defined by this.
  • the excess part of the melt flowing out of the measuring vessel via the overflow edge of the measuring vessel is passed back into the container.
  • this part of the discharge amount is not lost, but can be kept in the container for subsequent melt discharge from the container.
  • an outgoing from the overflow edge return line may be provided and possibly be part of the device.
  • the melt which flows out of the measuring vessel via the overflow edge is passed back into the container via this return line.
  • the return line can be designed as a groove or a pipe.
  • the metering tube can be designed as a return line or as part of the return line.
  • the metering tube typically starts at the overflow edge.
  • the metering tube may be configured as a riser which rises from the container to the measuring vessel to allow a gravity driven return of the excess melt from the measuring vessel into the container. In principle, however, it is also possible that the excess melt is not passed back into the named container, but into a separate collection reservoir.
  • the capacity of the measuring vessel and with it also the dosage can be reduced by means of a displacement body, which displaces part of the melt from the measuring vessel.
  • the displacement body is completely or partially fixed or locked within the measuring vessel, so that the metered amount is reduced by the arranged below the overflow edge volume of the displacement body.
  • the container for the melt is one Pressure vessel, which can therefore be pneumatically pressurized. Then it is possible to discharge the melt by pressurizing the container.
  • the device may thus be, for example, a metering furnace pressurized with a delivery gas.
  • Such metering furnaces are basically known, for example from the document DE 20 22 989 , Accordingly, the conveying device of the proposed device can be set up to produce the said pressure in the container in order to discharge the predetermined discharge quantity of the melt through the metering tube out of the container.
  • the metering tube is configured as a riser tube dipping into the container.
  • the metering tube is submerged within the container in the melt.
  • a lateral vessel wall of the measuring vessel has a passage opening into which the metering tube opens.
  • the measuring vessel is connected at this point with the metering tube by means of a flange connection.
  • the container has an outlet opening for the metering tube through which the metering tube passes.
  • the measuring cup depending on an individually present spatial Aufstellsituation of the container, for example. With respect to a die-casting machine, be arranged or attached to this outlet opening of the container. In this case, the metering tube ends at or in this outlet opening. However, it is also possible for the metering tube to have an end piece extended beyond this outlet opening, at the end of which the measuring vessel can then be fastened as described.
  • FIG. 1 schematically shows a cross section through a device 1 of the type proposed here for dispensing a predetermined dosage amount of a molten metal, for example of aluminum or zinc.
  • the dispensed dosage of the melt is, for example via a feed chute 2 in a filling chamber of a die-casting machine known type (not shown here) passed and further processed there.
  • a feed chute 2 in a filling chamber of a die-casting machine known type (not shown here) passed and further processed there.
  • other types of processing of the dispensed metered amount of the melt such as alternative casting methods, are possible.
  • the device 1 is designed as a metering furnace and comprises an electrically heatable, fireproofly lined and pressure-tight container 3 for the molten metal 4.
  • a metering tube 5 designed as a ceramic riser enters the melt.
  • the metering tube 5 rises up to an outlet opening 13 of the container 3 and flows there into a measuring vessel 6 of the device 1.
  • the device 1 further comprises a conveying device 7, which is adapted to pump via a gas line 8 with respect to the melt as inert as possible conveying gas into the container 3 and in this way to pressurize the container 3 with an overpressure.
  • the device 1 also comprises an in FIG. 1 shown in a highly schematized control unit 9.1, which is set up to control the conveyor unit 7 in periodically recurring working cycles to generate the overpressure, thereby to promote in each of these cycles a predetermined discharge of the melt through the metering tube 5 in the measuring vessel 6.
  • the discharge quantity flows into the measuring vessel 6 in each case in a single discharge stall in each work cycle.
  • the overpressure in each of the working cycles pulse-like and on the duration of the respective discharge of the predetermined discharge amount be limited so that in each case subsequently the melt in the metering tube 5 drops again.
  • a lateral vessel wall 10 of the measuring vessel 6 has an opening 11 into which the metering tube 5 opens and at which the measuring vessel 6 is connected to the metering tube 5 by means of a flange 12.
  • the metering tube 5 extends through an outlet opening 13 of the container 3 and ends at this outlet opening 13, so that the measuring vessel 6 is arranged and attached directly to this outlet opening 13.
  • the metering tube 5 it would also be possible for the metering tube 5 to have an end piece that is extended virtually as far as desired over this outlet opening 13, at the end of which the measuring vessel 6 would then be fastened.
  • the measuring vessel 6 has an overflow edge 14, by which a capacity of the measuring vessel 6 is limited and defined.
  • this overflow edge 14 is formed by a lower region of an edge 15 of the passage opening 11 of the measuring vessel 6.
  • the predetermined amount of discharge of the melt exceeds this capacity of the measuring vessel 6 by an excess amount, so that after the discharge amount was conveyed into the measuring vessel, a portion exceeding the capacity of the melt, ie the said excess amount, flows out of the measuring vessel via the overflow edge 14 again. In this case, the excess amount flows back through the metering tube 5 back into the container 3. It would also be possible in principle, however, that the excess melt is passed into a separate collecting reservoir.
  • the measuring vessel 6 contains exactly the dosing quantity of the melt defined in this way.
  • the predetermined discharge amount is such that the excess amount is at least 5%, preferably at least 10% of the capacity, but at the same time not more than 100% of the capacity, preferably not more than 50% of the capacity.
  • the metered amount of the melt is then discharged from the measuring vessel 6 into the feed chute 2, whereby the measuring vessel 6 is completely emptied.
  • This can be done in principle by tilting the measuring vessel 6, for example, a corresponding ausgestaltetes and arranged hinge.
  • the measuring vessel 6 has at its bottom 16 an outlet opening 17 for the melt, see FIG. 3
  • the outlet opening can be opened completely or partially and in this way an outflow speed of the melt can be predetermined.
  • the device 1 has an outlet device 19 which can be controlled by means of the control unit 9.2 and which is set up, for example by means of a motor or a pneumatic or hydraulic drive, to move the closure element 18 in order to open and close the outlet opening 17.
  • the control unit 9.2 is set up to actuate the outlet device 19 only after a predetermined waiting time has elapsed for opening the outlet opening 17, wherein the waiting time begins to run with the start of discharging the discharge quantity into the measuring vessel 6 and is selected to be long until its end Excess amount has completely drained from the measuring vessel 6 and in the measuring vessel 6 has formed a horizontal melting mirror at the level of the overflow edge 14.
  • the device 1 has a displacement body 20 which can be fixed or locked completely or partially within the measuring vessel in order to reduce the metering quantity by the volume of the displacement body 20 arranged below the overflow edge.
  • a controllable by the control unit 9.3 drive 21 the immersion depth of the displacement body 20 in the measuring vessel 6, and with it the dosage can be set variably.
  • control units 9.1, 9.2 and 9.3 shown can be connected to one another or integrated in a (central) control unit of the device 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP20140186435 2013-10-14 2014-09-25 Procédé et dispositif de dépôt d'une quantité de dosage d'une matière en fusion Withdrawn EP2859972A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310220670 DE102013220670A1 (de) 2013-10-14 2013-10-14 Verfahren und Vorrichtung zum Abgeben einer Dosiermenge einer Schmelze

Publications (1)

Publication Number Publication Date
EP2859972A1 true EP2859972A1 (fr) 2015-04-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20140186435 Withdrawn EP2859972A1 (fr) 2013-10-14 2014-09-25 Procédé et dispositif de dépôt d'une quantité de dosage d'une matière en fusion

Country Status (2)

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EP (1) EP2859972A1 (fr)
DE (1) DE102013220670A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022989A1 (de) 1970-05-12 1971-12-30 Westofen Gmbh Dosierautomatik fuer fluessige Metalle
DE2817499A1 (de) 1978-04-21 1979-10-31 Otto Dipl Ing Bolland Einrichtung fuer pneumatisch beaufschlagte oefen zur dosierten abgabe von metall, insbesondere an druckgussmaschinen
WO1999024194A1 (fr) * 1997-11-07 1999-05-20 Ab Jåfs Export Oy Holimesy Procede et appareil de fusion de metaux non ferreux, specialement le magnesium
DE19821946A1 (de) * 1998-05-15 1999-11-18 Friedhelm Kahn Verfahren und Vorrichtungen zum automatischen Gießen von Bauteilen durch quantifiziertes Füllen eines Raumes mit geschmolzenem Metall
JP2011161475A (ja) * 2010-02-08 2011-08-25 Fine Forming:Kk 溶湯供給装置及び溶湯貯留方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174440A (en) * 1967-12-05 1969-12-17 Schmitz & Apelt Industrieofenb Equipment for Mechanically Charging Casting Apparatus.
FR2100524A1 (en) * 1970-01-29 1972-03-24 Thomson Csf Molten metal ladle transfer device
DE102009037368A1 (de) * 2009-08-12 2011-02-17 Strikowestofen Gmbh Verfahren und Vorrichtung zum Dosieren von geschmolzenem Metall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022989A1 (de) 1970-05-12 1971-12-30 Westofen Gmbh Dosierautomatik fuer fluessige Metalle
DE2817499A1 (de) 1978-04-21 1979-10-31 Otto Dipl Ing Bolland Einrichtung fuer pneumatisch beaufschlagte oefen zur dosierten abgabe von metall, insbesondere an druckgussmaschinen
WO1999024194A1 (fr) * 1997-11-07 1999-05-20 Ab Jåfs Export Oy Holimesy Procede et appareil de fusion de metaux non ferreux, specialement le magnesium
DE19821946A1 (de) * 1998-05-15 1999-11-18 Friedhelm Kahn Verfahren und Vorrichtungen zum automatischen Gießen von Bauteilen durch quantifiziertes Füllen eines Raumes mit geschmolzenem Metall
JP2011161475A (ja) * 2010-02-08 2011-08-25 Fine Forming:Kk 溶湯供給装置及び溶湯貯留方法

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Publication number Publication date
DE102013220670A1 (de) 2015-04-16

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