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EP4347154A1 - Dispositif de coulée pour la coulée de métal fondu et procédé de coulée de métal fondu - Google Patents

Dispositif de coulée pour la coulée de métal fondu et procédé de coulée de métal fondu

Info

Publication number
EP4347154A1
EP4347154A1 EP22727243.2A EP22727243A EP4347154A1 EP 4347154 A1 EP4347154 A1 EP 4347154A1 EP 22727243 A EP22727243 A EP 22727243A EP 4347154 A1 EP4347154 A1 EP 4347154A1
Authority
EP
European Patent Office
Prior art keywords
melt
flow connection
electrode
casting device
connection element
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.)
Granted
Application number
EP22727243.2A
Other languages
German (de)
English (en)
Other versions
EP4347154C0 (fr
EP4347154B1 (fr
Inventor
Jürgen ILLK
Edmundo OLIVEIRA
Christian PUMBERGER
Markus SCHEIKL
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.)
Fill GmbH
Original Assignee
Fill 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 Fill GmbH filed Critical Fill GmbH
Publication of EP4347154A1 publication Critical patent/EP4347154A1/fr
Application granted granted Critical
Publication of EP4347154C0 publication Critical patent/EP4347154C0/fr
Publication of EP4347154B1 publication Critical patent/EP4347154B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B22D18/08—Controlling, supervising, e.g. for safety reasons
    • 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
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/003—Aluminium alloys
    • 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
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould

Definitions

  • the invention relates to a casting device for casting a melt and a method for casting a melt.
  • An electromagnetic pump for conveying a melt between a melting furnace and a casting mold is known from EP1097013B1.
  • EP1097013B1 has the disadvantage that the electromagnetic pump is poorly effective, particularly in the case of paramagnetic materials such as aluminum.
  • the object of the present invention was to overcome the disadvantages of the prior art and to provide a method and a device by means of which paramagnetic materials can also be conveyed.
  • a casting device is designed for casting a melt of a metallic material, the casting device having a flow connection element for guiding the melt.
  • a first electrode and a second electrode are arranged on the flow connection element, with the first electrode having a first melt contact surface and the second electrode having a second melt contact surface, with the melt contact surfaces being designed for contacting the melt guided in the flow connection element when the electrodes are installed.
  • a magnetic element is arranged on the flow connection element, which is designed to apply a magnetic field to the area of the melt to which current is applied.
  • the casting device according to the invention has the advantage that it can improve the quality of the casting process.
  • the magnetic element is designed as an electromagnet.
  • An electromagnet has the advantage that the magnetic field can be applied selectively. 2
  • At least one first heating element is arranged in the area of the first electrode and at least one second heating element is arranged in the area of the second electrode.
  • This has the advantage that excessive cooling of the melt in the area of the electrodes can be prevented by the heating elements, as a result of which solidification and/or cooling of the melt in the area of the electrodes can be prevented.
  • This can be necessary in particular if a material which has a high thermal conductivity is used for the electrodes. Especially with such a configuration, heat is quickly dissipated from the melt, resulting in the risk of local solidification and/or cooling of the melt in the area of the electrodes.
  • the melt can be kept at a certain melt level in the riser tube between individual casting processes, in particular during the removal of a cast workpiece, without the melt flowing in the riser tube.
  • the measures according to the invention make it possible to ensure that the melt does not solidify in the area of the electrodes.
  • the first heating element and the second heating element are each in the form of a resistance heating element, in particular with a ceramic heating conductor.
  • a heating element designed in this way can be easily heated if required, and moreover a sufficiently high temperature for heating the electrodes can be reached.
  • resistance heating elements with a ceramic heating element can quickly be heated to a high temperature.
  • two of the first heating elements are arranged on opposite sides of the cross section of the first electrode. This has the advantage that the electrode can be heated uniformly and/or more quickly over its cross section.
  • the first electrode has a rectangular cross section and that two of the first heating elements are arranged on opposite sides of the cross section of the first electrode. This has the advantage that the electrode can be heated evenly over its cross section. Provision can also be made for the heating elements to be dimensioned in such a way that if one of the two heating elements fails, the second of the heating elements can still generate sufficient thermal energy to maintain the required temperature.
  • a failure of one of the heating elements is detected by a machine controller and that the remaining heating element or elements are/are automatically heated beyond normal operation in order to compensate for the failure of one of the heating elements.
  • the failure of one of the heating elements can be detected, for example, by the lack of power consumption.
  • one of the first heating elements is arranged on all four sides of the rectangular cross section of the first electrode. This has the advantage that the electrode can be heated evenly across its cross section.
  • the electrodes it is possible for the electrodes to have a graphite material in a first region of the melt contact surfaces.
  • a graphite material has the advantage that it does not oxidize when it comes into contact with an aluminum melt.
  • a graphite material is a good electrical conductor.
  • a graphite material has a high temperature resistance.
  • the electrodes have an electrically conductive ceramic material in a first region of the melt contact surfaces.
  • a ceramic material has the advantage that it is surprisingly well suited to contacting the melt in the intended application.
  • the ceramic material has a high resistance to deformation, wear and chemical corrosion.
  • the ceramic is produced as a sintered component.
  • the electrodes have a material made of zirconium carbide in a first region of the melt contact surfaces.
  • Zirconium carbide is a compound with high chemical variability in the Zr-C ratio.
  • Zirconium carbide exists in a composition range from ZrCl.0 to approx. ZrC0.6. The electrical properties still remain largely stable.
  • Zirconium carbide differs from other materials in that it is thermally, chemically and mechanically stable up to extremely high temperatures of 2500 °C.
  • the electrodes have an austenitic material in a second region facing away from the melt contact surfaces.
  • This has the advantage that an austenitic material has good electrical conductivity with sufficient temperature resistance.
  • This brings with it the further advantage that the magnetic field is least influenced by an austenitic material. Ferritic materials would deflect the magnetic field.
  • the heating elements are each arranged in the second area of the electrodes.
  • bores are formed in the second region of the first electrode, in which rod-shaped first heating elements are arranged.
  • the use of rod-shaped heating elements inserted into the bores has the advantage that the electrode can be heated evenly and from the inside out.
  • good heat transfer into the electrode can be achieved by using the rod-shaped heating elements in the second area of the first electrode.
  • the bores for the rod-shaped heating elements are introduced into the second region of the electrode, starting from the interface between the first region of the electrode and the second region of the electrode.
  • the heating elements are designed in the form of flat heaters, which can have a rectangular cross section.
  • the magnetic element comprises a first coil and a second coil, which are arranged on two diametrically opposite sides of the cross section of the flow connection element.
  • the magnetic element comprises a magnetic core, in particular an iron core, which is C-shaped and is arranged in the area of the flow connection element in such a way that the flow connection element is located between a first open end of the magnetic core and a second open end of the magnetic core, wherein the first coil surrounds the first open end of the magnetic core and the second coil surrounds the second open end of the magnetic core.
  • the flow connection elements are formed, which are arranged evenly distributed around a center, with individual magnetic core segments being arranged between the flow connection elements, with a magnetic core segment at a first longitudinal end facing a first of the flow connection elements and at a second longitudinal end facing a second of the flow connecting elements, the first longitudinal end of the magnetic core segment being surrounded by a first of the individual coils and the second longitudinal end of the magnetic core segment being surrounded by a second of the individual coils.
  • This arrangement of the magnetic core segments can be distributed in the same way around the circumference. With such a structure, it is conceivable that two flow connection elements, three flow connection elements, four flow connection elements, five flow connection elements or a higher number of flow connection elements are distributed evenly around the circumference.
  • the individual coils are all supplied with current together in order to generate a magnetic field.
  • the individual coils can be supplied with current selectively and independently of one another in order to generate a magnetic field. This has the advantage that the magnetic field can be formed with different strengths across the air gap.
  • the magnetic element comprises a plurality of individual coils which are arranged in an evenly distributed manner around the cross section of the flow connection element, with magnetic core segments between the individual coils. elements are arranged, with a magnetic core segment being surrounded at a first longitudinal end by a first of the individual coils and at a second longitudinal end by a second one of the individual coils.
  • Such a configuration has the advantage that an increased effect of the magnetic field can be achieved.
  • a cooling device is formed in the area of the coils. This brings with it the advantage that overheating of the coils can be prevented by this measure.
  • a first recess is formed in the flow connection element, which serves to accommodate the first electrode.
  • a second recess can be formed, which serves to accommodate the second electrode.
  • the first electrode forms a loose fit with the first recess, so that the first electrode closes the first recess when it is inserted into the first recess.
  • the second electrode forms a loose fit with the second recess, so that the second electrode closes the second recess when it is inserted into the second recess.
  • a first positioning element is formed on the first electrode, which is used for positive positioning of the first electrode in the flow connection element.
  • the first positioning element is used for axial positioning and thus for determining the position of the first melt contact surface.
  • the first positioning element is designed in the form of a step, the first electrode being pushed into the flow connection element until the step comes to rest on a contact surface of the flow connection element. Furthermore, it can be provided that the first electrode is inserted into the flow connection element by means of a first pressing element is pressed in so that the paragraph is pressed against the contact surface of the flow connection element. In particular, it can be provided that the first pressing element is designed in the form of a spring element.
  • a second positioning element is formed on the second electrode, which is used for positive positioning of the second electrode in the flow connection element.
  • the second positioning element is used for axial positioning and thus for determining the position of the first melt contact surface.
  • the second positioning element is designed in the form of a step, the second electrode being pushed into the flow connection element until the step comes to rest on a contact surface of the flow connection element. Furthermore, it can be provided that the second electrode is pressed into the flow connection element by means of a second pressing element, so that the shoulder is pressed against the contact surface of the flow connection element. In particular, it can be provided that the second pressing element is designed in the form of a spring element.
  • first melt contact surface and the second melt contact surface have a surface in the form of a cylinder segment and continue the inner lateral surface of the flow connection element when the first electrode and the second electrode are installed.
  • the cross section of the flow connection element is rectangular at least in sections and that the two melt contact surfaces are arranged opposite one another and parallel to one another. This brings with it the advantage that the short-circuit current can flow uniformly over the extent of the melt contact surfaces between them. This allows a more even magnetic field to be generated in the melt.
  • the electrodes are each coupled to power sources by means of detachable clamping contacts. As a result, the individual electrodes can be changed simply and easily if necessary.
  • the invention also relates to a method for casting a melt of a metallic material's.
  • Current is applied to the melt of the metallic material by means of a first electrode and a second electrode, which contact the metallic material by means of melt contact surfaces.
  • a magnetic field acts on the area of the melt to which current is applied, with the electrodes being heated by means of heating elements if required.
  • a casting device is used for casting the melt, which is designed as a low-pressure casting device or as a counter-pressure casting device, wherein the casting device comprises a furnace in which a receiving space for receiving melt is formed, the receiving space being formed by means of the Flow connec tion element is coupled to a mold, wherein
  • the pressure in the receiving space is increased in order to push the melt through the flow connection element into the mold, wherein
  • the pressure in the receiving space is increased in such a way that at an inlet of the mold there is a constant pressure increase, in particular a pressure increase between 16 mbar/s and 45 mbar/s, preferably between 23 mbar/s and 35 mbar/s.
  • a constant pressure increase in particular a pressure increase between 16 mbar/s and 45 mbar/s, preferably between 23 mbar/s and 35 mbar/s.
  • a surprisingly good casting result can be achieved particularly with such a progression of the pressure rise.
  • a deviation of up to 3mbar/s from a linear pressure increase can also be seen as a constant pressure increase.
  • the values given in the paragraph above can relate to an increase in the differential pressure between the receiving space and the mold cavity. If at- For example, if the back pressure in the mold cavity is increased or decreased in a counter-pressure casting process, this can be taken into account accordingly in order to be able to achieve a constant increase in pressure.
  • This calculation result can be used to determine the activation times and activation intensities of the magnetic field and activation times and activation intensities of the current application to the melt, as well as to determine the pressure curve of the pressure application in the melt receiving space.
  • This has the advantage that the ideal casting process can be calculated for different cast workpieces. By calculating in a computer-implemented simulation model, a surprisingly good result of the cast workpiece can be achieved, since a large number of different parameters can be taken into account in comparison to a test-based procedure and the time to obtain different results can be significantly reduced.
  • the computer-implemented simulation model carries out the calculations using an artificial neural network.
  • a digital twin of the casting device is created and that the computer-implemented simulation model is adapted during the casting process.
  • melt properties such as a melt temperature
  • the parameters of the casting process such as the pressure rise curve over time and/or the time course and the intensity of the generation of the magnetic field and/or the time course and the intensity of the current application of the melt is adjusted depending on the melt properties.
  • the machine controller detects a change in the current or voltage present at the coils or a change in the current or voltage present at the electrodes and that the machine controller can adjust the currents and voltages accordingly. This adjustment can be made on the basis of stored adjustment tables. As an alternative to this, the adaptation can be carried out by using a neural network.
  • the measured currents and voltages allow conclusions to be drawn about the presence of errors.
  • the detected currents and voltages, as well as other sensor values can be taken into account in a simulation of the casting process. In this way, conclusions can be drawn about the quality of the cast workpiece. If a quality defect is expected, a quality inspection of the cast workpiece can be recommended.
  • a heating process for heating the electrodes is started with a lead time before the melt flow stops or before the flow rate falls below a minimum level, with the lead time being between 1 second and 600 seconds, in particular between 5 seconds and 120 seconds, preferably between 10 seconds and 60 seconds.
  • a melt level of the melt flows from a gate into a mold cavity and that meanwhile the pressure in the receiving space is increased and that at a predetermined point in time the magnetic field is deactivated.
  • the pressure in the receiving space is increased in accordance with the paragraph above, while a cast workpiece that has already been cast is removed from the mold cavity.
  • the magnetic field can then be deactivated at least temporarily when the mold cavity is closed again.
  • an air tank is coupled to the receiving space, in particular in a compressed air supply line in front of the compressed air supply opening. It can be provided here that the air tank is used to temporarily store compressed air in order to be able to increase the pressure in the receiving space at an increased speed. This allows the melt to flow into the mold cavity at an increased speed. This results in a shortening of the cycle time.
  • a controller is designed in such a way that the electrodes are permanently heated to a temperature that is higher than the solidus temperature of the melt.
  • this temperature can be between 550° Celsius and 850° Celsius, in particular between 700° Celsius and 750° Celsius.
  • the liquidus temperature is 594°C and the solidus temperature is 561°C.
  • FIG. 1 shows a first exemplary embodiment of a casting device in the form of a low-pressure die-casting device or counter-pressure die-casting device;
  • Fig. 2 shows another embodiment of a casting device in the form of a low-pressure die-casting device or counter-pressure die-casting device;
  • FIG. 4 shows a sectional illustration according to section line IV-IV from FIG. 3;
  • FIG. 5 shows a schematic cross-sectional view of the flow connection element of a further exemplary embodiment of the casting device
  • FIG. 6 shows a sectional illustration of a further exemplary embodiment of the casting device according to section line IV-IV from FIG. 3;
  • FIG. 7 shows a sectional illustration of a further exemplary embodiment of the casting device according to section line IV-IV from FIG. 3;
  • FIG. 8 shows a diagram of a time course of a filling process of a mold cavity of a casting mold.
  • Fig. 1 shows a schematic representation of a first embodiment of a G manvor device 1.
  • the casting device 1 is designed as a low-pressure mold casting device or as a counter-pressure mold casting device.
  • the casting device 1 can comprise a furnace 2 in which a receiving space 3 for receiving melt 4 can be formed.
  • a crucible 5 is arranged in the furnace 2, in which the melt 4 is received.
  • the crucible gel 5 can be made of a ceramic material which has a high temperature resistance.
  • the furnace 2 can be used in particular to keep the melt 4 at a high temperature level so that it remains in the molten state.
  • a mold mounting plate 6 can be formed, which delimits the furnace 2 at the top.
  • the platen 6 can either be designed as a separate component or as an integral component of the furnace 2 .
  • a mold 7 can be arranged above the mold clamping plate 6 , which mold has a lower mold part 8 and an upper mold part 9 .
  • the two mold parts 8, 9 form a mold cavity 10, which is used to measure the melt 4 and to shape the cast workpiece.
  • the mold 7 can be designed, for example, in the form of a permanent mold, which is suitable for pouring from several workpieces.
  • the casting mold 7 is designed as a lost casting mold, for example made of a sand material, and is therefore only used to cast a single workpiece.
  • a flow connection element 11 is formed, which is used to conduct the melt 4 from the crucible 5 into the mold cavity 10 .
  • the flow connecting element 11 is designed as a riser pipe 12 which protrudes into the receiving space 3 of the furnace 2 and the mold mounting plate 6 penetrates.
  • the lower mold part 8 can connect directly to the riser pipe 12 and have a gate 13 into which the riser pipe 12 opens.
  • a supporting structure 14 is shown in a highly simplified manner, which can be coupled to the upper mold part 9 and can be used to move the upper mold part 9 relative to the lower mold part 8 .
  • Furnace 2 can also have a compressed air supply opening 15 through which compressed air can be introduced into receiving space 3 of furnace 2 .
  • a magnetic element 16 is formed, which is arranged in the area of the flow connection element 11 in the present exemplary embodiment.
  • the magnetic element 16 can comprise an electromagnet 17 which has a coil 18 .
  • the coil 18 is designed in such a way that the flow cross section of the flow connection element 11 is surrounded by the coil 18 in an annular manner.
  • the coil 18 is arranged inside the furnace 2 and surrounds the riser pipe 12 and is subjected to a magnetic field.
  • the coil 18 is integrated into the riser pipe 12 .
  • a permanent magnet can also be provided instead of the coil 18, a permanent magnet can also be provided.
  • the magnetic element 16 in the region of the magnetic element 16 on an inner lateral surface 19 of the riser pipe 12 can comprise a first electrode 20 and a second electrode 21, which are designed for this purpose
  • a Lorenz force 22 can be exerted on the melt 4 guided in the flow connection element 11 by means of the magnetic element 16 .
  • the Lorenz force 22 can act in a conveying direction 23 or also act counter to the conveying direction 23 .
  • a first melt contact surface 24 of the first electrode 20 and a second melt contact surface 25 of the second electrode 21 can be integrated into the inner lateral surface 19 of the flow connection element 11 or the gate 13 .
  • the electrodes 20, 21 can end flush with the inner lateral surface 19 of the flow connection element 11 or the section 13.
  • the Lorenz force 22 acts as a conveying support for conveying the melt 4 from the crucible 5 into the mold cavity 10 .
  • the Lorenz force 22 serves to brake the melt 4 conveyed in the flow connecting element 11 .
  • the casting device 1 is designed as a different type of casting device 1 which has a flow connection element 11 .
  • the magnetic element 16 is arranged between the mold clamping plate 6 and the mold 7 .
  • Fig. 2 shows another embodiment of a low-pressure die casting device or. Counter-pressure gravity die casting device
  • FIG. 2 shows a further and possibly independent embodiment of the low-pressure die casting device or counter-pressure die casting device, the same reference numerals or component designations as in the previous FIG. 1 being used again for the same parts. In order to avoid unnecessary repetitions, reference is made to the detailed description in the preceding FIG. 1 .
  • the magnetic element 16 is integrated into the mold clamping plate 6 and surrounds the flow connecting element 11 in this area.
  • FIGS. 3 and 4 show a further and possibly independent embodiment of the casting device 1, with the same reference symbols or component designations as in the previous FIGS. 1 and 2 being used for the same parts. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIGS.
  • Fig. 3 shows the further exemplary embodiment of the casting device 1, in particular in the area of the magnetic element 16, in a schematic cross-sectional view cut through the flow connection element 11 at the level of the electrodes 20, 21.
  • FIG. 4 the further exemplary embodiment of the casting device 1, in particular in the area of the magnetic element 16, is shown in a sectional view along the section line IV-IV of FIG.
  • the first electrode 20 has a first melt contact surface 24 and the second electrode 21 has a second Melt contact surface 25 has.
  • a first positioning element 28 can be formed on the first electrode 20 , which in the present exemplary embodiment is formed, for example, as a shoulder which can be brought into contact with a first contact surface 29 of the flow connection element 11 .
  • a second positioning element 30 can be formed on the second electrode 21 , which in the present exemplary embodiment is formed, for example, as a shoulder which can be brought into contact with a second contact surface 31 of the flow connection element 11 .
  • a first pressing element 36 can be formed, by means of which the first electrode 20 is held in its position in the first recess 26 .
  • a second pressing element 37 can be provided, by means of which the second electrode 21 can be held in its position in the second recess 27 .
  • one or more heating elements 39 are arranged on the second electrode 21 .
  • the heating elements 38, 39 can be arranged on side faces of the electrodes 20, 21, respectively.
  • a magnetic yoke for example in the form of a C-shaped iron core or a magnetic core 41 can be formed, which can have a first open end 42 and a second open end 43 .
  • the magnetic core 41 can be arranged such that the flow connection element 11 is arranged between the first open end 42 and the second open end 43 of the magnetic core 41 .
  • the first coil 18 can surround the iron core 41 in the area of the first open end 42 .
  • the second coil 40 can surround the magnetic core 41 in the area of the second open end 43 .
  • FIG. 5 shows a further exemplary embodiment of the casting device 1.
  • a plurality of flow connection elements 11 to be formed, which can be arranged evenly distributed around a center.
  • these are, for example, four flow connection elements 11.
  • Individual magnetic core segments 45 can be arranged between the flow connection elements 11.
  • Each of the magnetic core segments 45 faces a first of the flow connection elements 11 at a first longitudinal end 46 and a second of the flow connection elements 11 at a second longitudinal end 47 .
  • the first longitudinal end 46 of the magnetic core segment 45 is in each case surrounded by a first of the individual coils 44 and the second longitudinal end 47 of the magnetic core segment 45 is in each case surrounded by a second of the individual coils 44 .
  • four magnetic core segments 45 are arranged between the four flow connection elements 11, with two of the individual coils 44 being formed for each magnetic core segment 45.
  • these can also be, for example, two, three, five, six, seven, eight and also several flow connection elements 11 . It is also conceivable that the individual coils 44 are coupled to a common power source. In an alternative embodiment variant, it is also conceivable that the individual individual coils 44 are each coupled to their own power source and can therefore be switched independently of one another.
  • the individual electrodes 20, 21 are coupled to a common power source. In an alternative embodiment, it is also conceivable that the individual electrodes 20, 21 are each coupled to their own power source and can therefore be switched independently of one another.
  • FIG. 6 shows a further and possibly independent embodiment of the casting device 1, the same reference numerals or component designations as in the preceding FIGS. 1 to 5 being used again for the same parts. In order to avoid unnecessary repetitions, reference is made to the detailed description in the preceding FIGS.
  • the first area 48, 49 and the second area 50, 51 can each lie loosely against one another. It is also conceivable for the first area 48, 49 and the second area 50, 51 to be coupled to one another by means of a joint.
  • FIG. 7 shows a further and possibly independent embodiment of the casting device 1, the same reference numerals or component designations as in the preceding FIGS. 1 to 6 being used again for the same parts. In order to avoid unnecessary repetitions, reference is made to the detailed description in the preceding FIGS. As can be seen from FIG. 7, it can be provided that bores are arranged in the second region 50, 51 and that the heating elements 38, 39 are arranged in the bores.
  • FIG. 8 shows a diagram of a time profile of a filling process for filling a mold cavity of a casting mold with melt.
  • Fig. 8 are different time courses of different filling curves with under different increases in pressure in the flow connecting element 11, in particular in the riser pipe 12, is shown.
  • the filling time is plotted on the abscissa.
  • the flow rate of the melt in the riser pipe 12 is plotted on the ordinate.
  • a first filling curve 52 shows the course over time of the flow rate of the melt in the riser pipe 12 with a pressure increase of 34 mbar/s and with activation of the magnetic field after a specific time.
  • a second filling curve 53 shows the course over time of the flow rate of the melt in the riser pipe 12 with a pressure increase of 24 mbar/s and with activation of the magnetic field after a specific time.
  • a third filling curve 54 shows the course over time of the flow rate of the melt in the riser pipe 12 with a pressure increase of 15.7 mbar/s and without activation of the magnetic field during the casting process.
  • This third filling curve 54 represents conventional casting methods as are known from the prior art.
  • All three filling curves 52, 53, 54 relate to three identical cast workpieces which are cast in the same casting device.
  • the drop in flow velocity at the end of the filling curve 52, 53, 54 represents the end of the filling duration of the casting process.
  • a shortened filling time can be achieved with an increased pressure rise, as is illustrated by the first filling curve 52.
  • the exemplary embodiments show possible variants, it being noted at this point that the invention is not limited to the specifically illustrated variants of the same, but rather that various combinations of the individual variants are also possible with one another and these possible variations are based on the teaching of technical action the present invention is within the skill of a person skilled in the art working in this technical field.
  • All information on value ranges in the present description is to be understood in such a way that it also includes any and all sub-ranges, e.g. the information 1 to 10 is to be understood as including all sub-ranges, starting from the lower limit 1 and the upper limit 10 i.e. all sub-ranges start with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un dispositif de coulée (1) pour la coulée d'un matériau métallique fondu (4), ledit dispositif de coulée (1) comportant un élément de raccordement d'écoulement (11) pour conduire le métal fondu (4). Une première électrode (20) et une seconde électrode (21) sont disposées sur l'élément de raccordement d'écoulement (11), la première électrode (20) ayant une première surface de contact avec métal fondu (24), et la seconde électrode (21) ayant une seconde surface de contact avec métal fondu (25). Lorsque les électrodes (20, 21) sont installées, les surfaces de contact avec métal fondu (24, 25) sont conçues pour entrer en contact avec le métal fondu (4) qui est conduit dans l'élément de raccordement d'écoulement (11), et l'élément de raccordement d'écoulement est équipé d'un élément magnétique (16) qui est conçu pour appliquer un champ magnétique à la région de métal fondu (4) qui est alimentée en courant.
EP22727243.2A 2021-05-28 2022-05-25 Dispositif de coulée pour la coulée de métal fondu et procédé de coulée de métal fondu Active EP4347154B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50431/2021A AT525116B8 (de) 2021-05-28 2021-05-28 Gießvorrichtung zum Gießen einer Schmelze, sowie ein Verfahren zum Gießen einer Schmelze
PCT/AT2022/060179 WO2022246488A1 (fr) 2021-05-28 2022-05-25 Dispositif de coulée pour la coulée de métal fondu et procédé de coulée de métal fondu

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US2743492A (en) * 1953-04-20 1956-05-01 Allegheny Ludlum Steel Apparatus for controlling the flow of molten metal
JPH01170561A (ja) * 1987-12-24 1989-07-05 Nippon Steel Corp 溶融金属流通管の通電加熱方法
DE69808150T2 (de) 1998-07-06 2003-05-15 Disa Industries A/S, Herlev Verfahren und vorrichtung für den steigenden guss von metall
US6732890B2 (en) * 2000-01-15 2004-05-11 Hazelett Strip-Casting Corporation Methods employing permanent magnets having reach-out magnetic fields for electromagnetically pumping, braking, and metering molten metals feeding into metal casting machines
AT521190B1 (de) * 2018-04-27 2021-08-15 Fill Gmbh Verfahren zum Gießen einer Schmelze eines metallischen Werkstoffes, sowie zum Durchführen des Verfahrens ausgebildete Gießvorrichtung

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AT525116B8 (de) 2023-08-15
AT525116B1 (de) 2023-06-15
WO2022246488A1 (fr) 2022-12-01
AT525116A1 (de) 2022-12-15
EP4347154C0 (fr) 2025-04-02
EP4347154B1 (fr) 2025-04-02

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