EP3622782A1 - Vorrichtung und verfahren zum schwebeschmelzen mit gekippt angeordneten induktionseinheiten - Google Patents
Vorrichtung und verfahren zum schwebeschmelzen mit gekippt angeordneten induktionseinheitenInfo
- Publication number
- EP3622782A1 EP3622782A1 EP19739555.1A EP19739555A EP3622782A1 EP 3622782 A1 EP3622782 A1 EP 3622782A1 EP 19739555 A EP19739555 A EP 19739555A EP 3622782 A1 EP3622782 A1 EP 3622782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- induction coils
- melting
- batch
- induction
- coils
- 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
Links
- 230000006698 induction Effects 0.000 title claims abstract description 68
- 238000002844 melting Methods 0.000 title claims abstract description 46
- 230000008018 melting Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005339 levitation Methods 0.000 title claims abstract description 25
- 230000001965 increasing effect Effects 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims description 30
- 239000003302 ferromagnetic material Substances 0.000 claims description 16
- 239000004020 conductor Substances 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims description 7
- 238000010309 melting process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000013598 vector Substances 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 2
- 230000005291 magnetic effect Effects 0.000 abstract description 25
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 description 24
- 239000000155 melt Substances 0.000 description 22
- 230000008901 benefit Effects 0.000 description 6
- 238000011109 contamination Methods 0.000 description 6
- 230000005294 ferromagnetic effect Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/22—Furnaces without an endless core
- H05B6/32—Arrangements for simultaneous levitation and heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/44—Coil arrangements having more than one coil or coil segment
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/22—Furnaces without an endless core
- H05B6/24—Crucible furnaces
- H05B6/26—Crucible furnaces using vacuum or particular gas atmosphere
Definitions
- This invention relates to a levitation melting method and a device for producing castings with induction units arranged in a tilted manner.
- induction units are used in which the respective opposite ferrite poles with the induction coils are not configured lying in one plane, but tilted at a certain angle to the levitation plane. In this way, an increase in the efficiency of the induced magnetic field for melting the batches can be achieved in the induction units.
- the tilted arrangement increases the proportion of the induced magnetic field that effectively contributes to the holding force of the field for levitation of the melt.
- US 2,686,864 A also describes a method in which a conductive melting material z. B. is suspended in a vacuum under the influence of one or more coils without the use of a crucible. In one embodiment, two coaxial coils are used to stabilize the material in suspension. After melting, the material is dropped or poured into a mold. The process described there made it possible to hold a 60 g portion of aluminum in suspension.
- the molten metal is removed by reducing the field strength so that the melt escapes downwards through the tapered coil. If the field strength is reduced very quickly, the metal falls out of the device in the molten state. It has already been recognized that the “weak spot” of such coil arrangements lies in the middle of the coils, so that the amount of material that can be melted in this way is limited.
- US 4,578,552 A also discloses an apparatus and a method for levitation melting.
- the same coil is used both for heating and for holding the melt, the frequency of the alternating current applied being varied to regulate the heating power, while the current strength is kept constant.
- the particular advantages of suspension melting are that contamination of the melt by a crucible material or other materials that are in contact with the melt in other processes is avoided.
- the reaction of a reactive melt, for example of titanium alloys, with the crucible material is excluded, which would otherwise force ceramic crucibles to escape onto copper crucibles operated using the cold crucible method.
- the floating melt is only in contact with the surrounding atmosphere, which is e.g. B. can be vacuum or protective gas. Because there is no fear of a chemical reaction with a crucible material, the melt can also be heated to very high temperatures.
- the Lorentz force of the coil field must compensate for the weight of the batch in order to be able to keep it in suspension. It pushes the batch up out of the coil field.
- the aim is usually to reduce the distance between the opposing ferrite poles. The reduction in distance allows the same magnetic field that is required to hold a certain melt weight to be generated with a lower voltage. In this way, the holding efficiency of the system can be improved so that a larger batch can be levitated.
- the process should allow the use of larger batches by improving the efficiency of the coil field.
- it should enable high throughput due to shorter cycle times, while ensuring that the casting process continues safely without contact of the melt with the coils or their poles.
- the object is achieved by the method according to the invention and the device according to the invention.
- a method for the production of castings from an electrically conductive material in the levitation melting method whereby to bring about the levitation of a batch, alternating electromagnetic fields are used, which are generated with at least one pair of opposite induction coils with a core made of a ferromagnetic material, comprising the following steps :
- the volume of the molten batch is preferably sufficient to fill the mold to an extent sufficient for the production of a cast body (“filling volume”). After the casting mold has been filled, it is left to cool or cooled with coolant, so that the material solidifies in the mold. The cast body can then be removed from the mold.
- a “conductive material” is understood to mean a material which has a suitable conductivity in order to inductively heat the material and keep it in suspension.
- a “floating state” is understood to mean a state of complete floating, so that the treated batch has no contact with a crucible or a platform or the like.
- ferrite pole is used synonymously with the term “core made of a ferromagnetic material” in the context of this application.
- coil and “induction coil” are used synonymously next to each other.
- the longitudinal axes of the induction coils with their cores in at least one pair are not arranged within a horizontal plane.
- the induction coils are arranged tilted downward from the level of the levitation.
- the angle ⁇ between the longitudinal axes of the induction coils with their cores and the horizontal plane in at least one pair is in each case 0 ° ⁇ ⁇ 60 °, particularly preferably
- the magnetic flux is identical in the absence of a charge in the magnetic field above and below the plane.
- the magnetic flux below the level makes almost no contribution to the holding force of the magnetic field when levitating a batch.
- the L-shaped arrangement of the coil axes according to the invention makes it possible to increase the holding force of the field, since this increases the magnetic flux above the plane.
- the induction coils and / or their cores made of a ferromagnetic material have, at least in part, a frustoconical or conical shape. see form.
- the special conical shape of the ferrite cores is designed in such a way that the concentration of the magnetic field in the space between the opposing pairs of coils is maximized, but the material still remains far from saturation.
- a ferromagnetic element (ferrite ring), which is arranged around the cores of ferromagnetic material and is described in more detail below, separates the magnetic flux, which would otherwise reduce the magnetic field in the intermediate space.
- the induction coils are arranged in pairs, which are operated at the same frequency and generate a magnetic field in the same direction. In their conical shape, they are optimized in the same way as the poles, on the one hand to minimize joule heat losses in order to achieve an increase in efficiency. On the other hand, they are designed for an optimal distribution of the magnetic field below the melt, which ensures levitation, and of the magnetic fields above and to the side of the melt, which counteract levitation but ensure the shape stability of the melt.
- the induction coils can also be positioned closer to each other so that the distance between the opposite poles becomes smaller, which leads to a further increase in the magnetic field induction on the underside of the levitating charge and thus to a more efficient melting process.
- the induction coils with their cores in a particularly preferred embodiment variant are each movably supported in at least one pair.
- the coils of a pair preferably move in opposite directions in a centrosymmetric manner around the center of the induction coil arrangement.
- the coils are pushed together in the melting position. If the batch has melted and is to be poured into the casting mold, the coils are not simply switched off or the current level is reduced, as is customary in the prior art, but are moved according to the invention to a casting position. This increases the distance between the coils, which on the one hand increases the free passage knife for the melt on its way into the mold and on the other hand continuously and controlledly reduces the load-bearing capacity of the induced magnetic field. In this way, the melt is safely kept away from the induction coils and their cores as they pass through the coil plane and only slowly passes into the case because the field is already weakened in the center, but is still strong enough at the coils to meet the requirements To prevent contact. This prevents contamination of the coils and ensures a clean cast in the mold without splashing.
- the motion vectors of the induction coils in the induction coil pairs are not identical to their longitudinal axes.
- the coils are not separated from one another along their longitudinal axis, but rather the tilted coils are displaced within the horizontal.
- the magnetic field level for levitation remains in the same vertical position even when the batch is poured.
- the current intensity in these induction coils is reduced simultaneously with the movement of the induction coils in the induction coil pairs from the melting position into the casting position. This makes it possible to reduce the displacement of the induction coils, since the induced magnetic field is no longer reduced only by the greater distance of the induction coils. However, it is important to ensure that the reduction in the current intensity is coordinated with the shifting of the coils in such a way that the field strength is always sufficiently high to be able to keep the melt away from the coils.
- the distance between the induction coils in the induction coil pairs from the melting position to the casting position is increased by 5-100 mm, preferably 10-50 mm.
- the batch weights for which the system is to be designed and the size of the minimum distance between the coils and the field strength that can be generated with them must be taken into account.
- the electrically conductive material used according to the invention has at least one high-melting metal from the following group: titanium, zirconium, vanadium, tantalum, tungsten, hafnium, niobium, rhenium, molybdenum.
- a less high-melting metal such as nickel, iron or aluminum can also be used.
- a mixture or alloy with one or more of the aforementioned metals can also be used as the conductive material.
- the metal preferably has a proportion of at least 50% by weight, in particular at least 60% by weight or at least 70% by weight, of the conductive material. It has been shown that these metals are particularly advantageous benefit from the present invention.
- the conductive material is titanium or a titanium alloy, in particular TiAl or TiAIV.
- metals or alloys can be processed particularly advantageously, since they have a pronounced dependence of the viscosity on the temperature and, moreover, are particularly reactive, in particular with regard to the materials of the casting mold. Since the method according to the invention combines contactless melting in suspension with extremely rapid filling of the casting mold, a particular advantage can be realized for such metals.
- the process according to the invention can be used to produce cast bodies which have a particularly thin or even no oxide layer from the reaction of the melt with the material of the mold. And in the case of the high-melting metals in particular, the improved utilization of the induced eddy current and the exorbitant reduction in heat losses due to thermal contact have a noticeable effect on the cycle times. Furthermore, the load capacity of the magnetic field generated can be increased, so that even heavier batches can be kept in suspension.
- the conductive material is superheated during melting to a temperature which is at least 10 ° C., at least 20 ° C. or at least 30 ° C. above the melting point of the material. Overheating prevents the material from instantaneously solidifying when it comes into contact with the mold, whose temperature is below the melting temperature. It is achieved that the batch can be distributed in the mold before the viscosity of the material becomes too high. It is an advantage of levitation melting that there is no need to use a crucible that is in contact with the melt. The high loss of material from the cold crucible process on the crucible wall is avoided, as is contamination of the melt by crucible components.
- the melt can be heated to a relatively high degree, since it can be operated in a vacuum or under protective gas and there is no contact with reactive materials.
- the overheating is therefore preferably limited to a maximum of 300 ° C., in particular a maximum of 200 ° C. and particularly preferably a maximum of 100 ° C. above the melting point of the conductive material.
- At least one ferromagnetic element is arranged horizontally around the area in which the batch is melted in order to concentrate the magnetic field and stabilize the batch.
- the ferromagnetic element can be arranged in a ring around the melting area, whereby “ring-shaped” means not only circular elements, but also angular, in particular quadrangular or polygonal ring elements.
- the ring elements are divided into sub-segments according to the number of coils, between which the respective induction coils with their poles move in a form-fitting manner.
- the ferromagnetic element can furthermore have a plurality of rod sections which, in particular, project horizontally in the direction of the melting region.
- the ferromagnetic element consists of a ferromagnetic material, preferably with an amplitude permeability of m 3 > 10, more preferably m 3 > 50 and particularly preferably m 3 > 100.
- the amplitude permeability relates in particular to the permeability in a temperature range between 25 ° C. and 150 ° C and with a magnetic flux density between 0 and 500 mT.
- the amplitude permeability is in particular at least one hundredth, in particular at least 10 hundredth or 25 hundredths of the amplitude permeability of soft magnetic ferrite (for example 3C92). Suitable materials are known to the person skilled in the art.
- a device for levitation melting of an electrically conductive material comprising at least a pair of opposing induction coils with a core made of a ferromagnetic material to bring about the levitation of a charge by means of alternating electromagnetic fields, the longitudinal axes of the induction coils with their cores in at least one pair are not arranged within a horizontal plane.
- Figure 1 is a side sectional view of a mold below a melting area with ferromagnetic material, coils and a batch of conductive material.
- Figure 2 is a side sectional view of tilted coils.
- FIG. 3 is a sectional side view of an embodiment variant with frustoconical induction coils and poles.
- Figure 4 is a top view of the coil assembly of Figure 3.
- Figure 5 is a side perspective view of the coil assembly of Figure 3.
- FIG. 1 shows a batch (1) made of conductive material, which is located in the area of influence of alternating electromagnetic fields (melting area), which are generated with the aid of the coils (3). Below the batch (1) there is an empty mold (2) by a holder (5) is kept in the filling area.
- the casting mold (2) has a funnel-shaped filling section
- the holder (5) is suitable for lifting the casting mold (2) from a feed position into a casting position, which is symbolized by the arrow shown.
- a ferromagnetic material (4) is arranged in the core of the coils (3).
- the axes of the pair of coils shown in dotted lines in the drawing are tilted downwards in relation to the horizontal plane of levitation, two opposing coils (3) forming a pair.
- FIG. 2 shows a side sectional view analogous to FIG. 1 of coils (3) arranged in a tilted manner with their cores made of the ferromagnetic material (4).
- the horizontal plane is shown in dashed lines and the angles ⁇ are marked by which the dotted longitudinal axes of the coils (3) are tilted out of the horizontal plane.
- FIG. 3 shows a side sectional view of an embodiment variant with frusto-conical coils and poles shown in black.
- the section plane runs centrally through the longitudinal axis of a pair of coils.
- the induction coils (3) and their cores made of a ferromagnetic material (4) are each frustoconical in shape and surrounded by a ferrite ring.
- the induction coils (3) are designed as waveguides, which additionally offers the option of internal cooling using a cooling fluid.
- the longitudinal axes of the poles and coils tilted towards the levitation plane are clearly visible.
- FIG. 4 and FIG. 5 show the coil arrangement from FIG. 3 in a top view or a side perspective view.
- the arrangement consists of two pairs of coils, which are oriented at 90 ° to each other.
- the induction coils (3) are mounted with their cores made of a ferromagnetic material (4) in a form-fit, movable manner between four ferrite ring segments, so that an octagonal ferromagnetic element is formed and they can be moved between a closely spaced melting position and a widely spaced casting position.
- Figures 4 and 5 both show the melting position of the coils.
- the displacement path of the coils between the inside of the ring and the outside of the ring can be clearly seen, in particular in FIG. LIST OF REFERENCES
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
- Continuous Casting (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201930009T SI3622782T1 (sl) | 2018-07-17 | 2019-07-09 | Naprava in postopek za lebdilno taljenje z nagnjeno razmeščenimi indukcijskimi enotami |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018117304.0A DE102018117304A1 (de) | 2018-07-17 | 2018-07-17 | Vorrichtung und Verfahren zum Schwebeschmelzen mit gekippt angeordneten Induktionseinheiten |
PCT/EP2019/068432 WO2020016063A1 (de) | 2018-07-17 | 2019-07-09 | Vorrichtung und verfahren zum schwebeschmelzen mit gekippt angeordneten induktionseinheiten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3622782A1 true EP3622782A1 (de) | 2020-03-18 |
EP3622782B1 EP3622782B1 (de) | 2020-09-16 |
Family
ID=67262294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19739555.1A Active EP3622782B1 (de) | 2018-07-17 | 2019-07-09 | Vorrichtung und verfahren zum schwebeschmelzen mit gekippt angeordneten induktionseinheiten |
Country Status (12)
Country | Link |
---|---|
US (1) | US11102850B1 (de) |
EP (1) | EP3622782B1 (de) |
JP (1) | JP6931748B1 (de) |
KR (1) | KR102237272B1 (de) |
CN (1) | CN111742616B (de) |
DE (1) | DE102018117304A1 (de) |
ES (1) | ES2825948T3 (de) |
PT (1) | PT3622782T (de) |
RU (1) | RU2737067C1 (de) |
SI (1) | SI3622782T1 (de) |
TW (1) | TWI736936B (de) |
WO (1) | WO2020016063A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023122336A1 (en) * | 2021-12-24 | 2023-06-29 | Build Beyond, Llc | System and method for generating a controlled magnetic flux |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE422004C (de) | 1925-11-23 | Otto Muck Dipl Ing | Verfahren und Vorrichtung zum Schmelzen, insbesondere von Leitern u. dgl. durch elektrische Induktionsstroeme | |
US2686864A (en) | 1951-01-17 | 1954-08-17 | Westinghouse Electric Corp | Magnetic levitation and heating of conductive materials |
BE655473A (de) | 1963-11-21 | 1900-01-01 | ||
US3354285A (en) * | 1964-04-17 | 1967-11-21 | Union Carbide Corp | Electromagnetic flux concentrator for levitation and heating |
US4578552A (en) | 1985-08-01 | 1986-03-25 | Inductotherm Corporation | Levitation heating using single variable frequency power supply |
US5150272A (en) * | 1990-03-06 | 1992-09-22 | Intersonics Incorporated | Stabilized electromagnetic levitator and method |
US5003551A (en) * | 1990-05-22 | 1991-03-26 | Inductotherm Corp. | Induction melting of metals without a crucible |
AU680154B2 (en) * | 1994-08-23 | 1997-07-17 | Nippon Steel & Sumitomo Metal Corporation | Method of continuously casting molten metal and apparatus therefor |
SE503562C2 (sv) * | 1995-02-22 | 1996-07-08 | Asea Brown Boveri | Sätt och anordning för stränggjutning |
TW297050B (de) | 1995-05-19 | 1997-02-01 | Daido Steel Co Ltd | |
US6059015A (en) * | 1997-06-26 | 2000-05-09 | General Electric Company | Method for directional solidification of a molten material and apparatus therefor |
US20020005233A1 (en) * | 1998-12-23 | 2002-01-17 | John J. Schirra | Die cast nickel base superalloy articles |
KR100952904B1 (ko) | 2008-12-30 | 2010-04-16 | 김차현 | 2단계 고주파 부양용해를 이용한 진공주조장치 및 주조방법 |
DE102011018675A1 (de) * | 2011-04-18 | 2012-10-18 | Technische Universität Ilmenau | Vorrichtung und Verfahren zum aktiven Manipulieren einer elektrisch leitfähigen Substanz |
DE102011082611A1 (de) | 2011-09-13 | 2013-03-14 | Franz Haimer Maschinenbau Kg | Induktionsspuleneinheit |
DE102017100836B4 (de) | 2017-01-17 | 2020-06-18 | Ald Vacuum Technologies Gmbh | Gießverfahren |
-
2018
- 2018-07-17 DE DE102018117304.0A patent/DE102018117304A1/de not_active Withdrawn
-
2019
- 2019-07-09 JP JP2020567511A patent/JP6931748B1/ja active Active
- 2019-07-09 SI SI201930009T patent/SI3622782T1/sl unknown
- 2019-07-09 RU RU2020126250A patent/RU2737067C1/ru active
- 2019-07-09 WO PCT/EP2019/068432 patent/WO2020016063A1/de unknown
- 2019-07-09 PT PT197395551T patent/PT3622782T/pt unknown
- 2019-07-09 CN CN201980014924.8A patent/CN111742616B/zh active Active
- 2019-07-09 EP EP19739555.1A patent/EP3622782B1/de active Active
- 2019-07-09 US US17/049,537 patent/US11102850B1/en active Active
- 2019-07-09 KR KR1020207026219A patent/KR102237272B1/ko active IP Right Grant
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TW202007223A (zh) | 2020-02-01 |
US20210251055A1 (en) | 2021-08-12 |
KR20200116159A (ko) | 2020-10-08 |
JP6931748B1 (ja) | 2021-09-08 |
WO2020016063A1 (de) | 2020-01-23 |
JP2021526300A (ja) | 2021-09-30 |
CN111742616B (zh) | 2021-06-18 |
ES2825948T3 (es) | 2021-05-17 |
RU2737067C1 (ru) | 2020-11-24 |
DE102018117304A1 (de) | 2020-01-23 |
KR102237272B1 (ko) | 2021-04-07 |
SI3622782T1 (sl) | 2020-11-30 |
US11102850B1 (en) | 2021-08-24 |
TWI736936B (zh) | 2021-08-21 |
CN111742616A (zh) | 2020-10-02 |
EP3622782B1 (de) | 2020-09-16 |
PT3622782T (pt) | 2020-10-19 |
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