EP3626028A1 - Schwebeschmelzverfahren mit beweglichen induktionseinheiten - Google Patents
Schwebeschmelzverfahren mit beweglichen induktionseinheitenInfo
- Publication number
- EP3626028A1 EP3626028A1 EP19739553.6A EP19739553A EP3626028A1 EP 3626028 A1 EP3626028 A1 EP 3626028A1 EP 19739553 A EP19739553 A EP 19739553A EP 3626028 A1 EP3626028 A1 EP 3626028A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melting
- batch
- casting
- induction coils
- 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 50
- 238000002844 melting Methods 0.000 title claims abstract description 47
- 230000008018 melting Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005339 levitation Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 37
- 230000001965 increasing effect Effects 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims description 13
- 239000003302 ferromagnetic material Substances 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 11
- 230000005672 electromagnetic field Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000010309 melting process Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 15
- 230000005291 magnetic effect Effects 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 description 23
- 239000000155 melt Substances 0.000 description 19
- 230000008901 benefit Effects 0.000 description 7
- 238000011109 contamination Methods 0.000 description 6
- 230000005294 ferromagnetic effect Effects 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000013021 overheating Methods 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
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 239000012768 molten material Substances 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
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004907 flux Effects 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
- 230000001105 regulatory effect 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
- H05B6/36—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
-
- 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
-
- 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
- H05B6/22—Furnaces without an endless core
- H05B6/24—Crucible furnaces
- H05B6/26—Crucible furnaces using vacuum or particular gas atmosphere
-
- 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
Definitions
- This invention relates to a levitation melting method and a device for producing castings with movable induction units.
- the method uses induction units in which the ferrite poles opposite each other are designed to be movable with the induction coils and to move in opposite directions.
- the induction units for melting the batches can be arranged close together in order to achieve an increase in efficiency of the induced magnetic field.
- the reduction of the induced magnetic field is made by increasing the distance between the ferrite poles and the induction coils and thus avoiding contact with the melt with the ferrite poles or the induction coils.
- 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 egg nes 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. With the procedure described there, a 60 g portion of aluminum could be kept 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, since the frequency of the alternating current applied is 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 suspended. It pushes the batch up out of the coil field.
- a reduction in the distance between the opposite ferrite poles is sought. The reduction in distance allows the same magnetic field to be generated with a lower voltage that is required to hold a specific melt weight. In this way, the holding efficiency of the system can be improved so that a larger batch can be levitated.
- the heating efficiency is also increased, since the losses in the induction coils are reduced.
- the process should allow larger batches to be used due to improved efficiency of the coil field and enable high throughput due to shortened 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.
- alternating electromagnetic fields are used, which are generated with at least one pair of opposing induction coils with a core made of a ferromagnetic material, the induction coils with their cores are movably arranged in each pair in each pair and move between a melting position at a short distance and a casting position at a large distance, 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 (“fill volume”). After filling the mold, it is allowed to cool or is 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 efficiency of the generated alternating electromagnetic field can be increased by moving the induction coil pairs closer together. This enables even heavier batches to be levitated.
- the risk of the molten batch touching the coils or ferrite poles increases as the free cross section between the coils decreases. Such contaminations are to be strictly avoided, since they are difficult and expensive to remove again and therefore result in a longer failure of the system.
- the induction coils with their cores according to the invention are each movably mounted 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 mold, the coils are not simply switched off or the current level is regulated down, as is customary in the prior art, but instead are moved outwards according to the invention into a casting position. This increases the distance between the coils, which on the one hand creates a larger free diameter for the melt on its way into the mold and on the other hand continuously and in a controlled manner reduces the load-bearing capacity of the induced magnetic field.
- 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 Prevent contact. This prevents contamination of the coils and ensures a clean cast into the mold without splashing.
- 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 path of the induction coils because the induced magnetic field is no longer reduced only by the greater distance between 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 of 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.
- it must be taken into account for which batch weights the system is to be designed and how large the minimum distance between the coils and the field strength that can be generated with them.
- 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 particularly benefit from the advantages of 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. With the method according to the invention, castings can be produced which have a particularly thin or even no oxide layer from the reaction of the melt with the material of the casting 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 upon contact with the mold, the temperature of which 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 preferably limited to at most 300 ° C, in particular at most 200 ° C and particularly preferably at most 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, with "ring-shaped" not only circular elements, but also angular, in particular quadrangular or polygonal ring elements can be understood. So that the inventive movement of the induction coils is possible, the ring elements are divided according to the number of coils into sub-segments, between which the respective induction coils with their poles move positively.
- the ferromagnetic element may also have a plurality of rod sections which, in particular, protrude 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 hundredths 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 Indu Vietnamesesspu len with a core made of a ferromagnetic material for bringing about the Schwebezu state of a batch by means of alternating electromagnetic fields, the induction coils with their cores movable in each pair are arranged and move between a melting position with a small distance and a casting position with a large distance.
- 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 plan view of an arrangement with two pairs of coils and a ferromagnetic ring-shaped element.
- Figure 1 shows a batch (1) made of conductive material, which is in the area of influence of alternating electromagnetic fields (melting range), which are generated with the help of the coils (3). Below the batch (1) there is an empty mold (2) by a holder
- the casting mold (2) has a funnel-shaped filling section
- the holder (5) is suitable for moving the mold (2) from a supply position into a casting mold. position, which is symbolized by the drawn arrow.
- a ferromagnetic material (4) is arranged in the core of the coils (3).
- the axes of the pair of coils (3) are aligned horizontally, with two opposing coils (3) forming a pair.
- the drawing shows the melting position of the coil arrangement at a short distance.
- the batch (1) is melted in the process according to the invention in suspension and poured into the casting mold (2) after the melt has taken place.
- the coils (3) as symbolized by the arrow shown, are separated from each other until the Lorentz force of the field can no longer compensate for the weight of the batch (1).
- Figure 2 shows a plan view of an arrangement with two pairs of coils and a ferromagnetic ring-shaped element (7).
- the annular element (7) is designed as an octagonal ring element.
- Two coils (3) with their ferro-magnetic material (4) lying on an axis A, B form a pair of coils.
- the coil axes A, B are arranged at right angles to each other.
- the figure shows the melting position of the coil arrangement with narrow distances between the coils (3).
- the ferromagnetic materials (4) positively seated in the annular element (7) then move together with their coils (3), as indicated by the double arrows, to pour the levitating melt outwards.
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 (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201930003T SI3626028T1 (sl) | 2018-07-17 | 2019-07-09 | Postopek lebdilnega taljenja s premičnimi indukcijskimi enotami |
PL19739553T PL3626028T3 (pl) | 2018-07-17 | 2019-07-09 | Sposób topienia lewitacyjnego z ruchomymi jednostkami indukcyjnymi |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018117300.8A DE102018117300B3 (de) | 2018-07-17 | 2018-07-17 | Schwebeschmelzverfahren mit beweglichen Induktionseinheiten |
PCT/EP2019/068430 WO2020016061A1 (de) | 2018-07-17 | 2019-07-09 | Schwebeschmelzverfahren mit beweglichen induktionseinheiten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3626028A1 true EP3626028A1 (de) | 2020-03-25 |
EP3626028B1 EP3626028B1 (de) | 2020-06-03 |
Family
ID=67262292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19739553.6A Active EP3626028B1 (de) | 2018-07-17 | 2019-07-09 | Schwebeschmelzverfahren mit beweglichen induktionseinheiten |
Country Status (13)
Country | Link |
---|---|
US (1) | US11197351B2 (de) |
EP (1) | EP3626028B1 (de) |
JP (1) | JP6931749B1 (de) |
KR (1) | KR102217611B1 (de) |
CN (1) | CN111771425B (de) |
DE (1) | DE102018117300B3 (de) |
ES (1) | ES2803427T3 (de) |
PL (1) | PL3626028T3 (de) |
PT (1) | PT3626028T (de) |
RU (1) | RU2735331C1 (de) |
SI (1) | SI3626028T1 (de) |
TW (1) | TWI727370B (de) |
WO (1) | WO2020016061A1 (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 (15)
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 |
US2664496A (en) * | 1952-11-25 | 1953-12-29 | Westinghouse Electric Corp | Apparatus for the magnetic levitation and heating of conductive materials |
BE655473A (de) | 1963-11-21 | 1900-01-01 | ||
US4578552A (en) * | 1985-08-01 | 1986-03-25 | Inductotherm Corporation | Levitation heating using single variable frequency power supply |
SU1764189A1 (ru) * | 1988-08-29 | 1992-09-23 | Производственное объединение "Черниговский радиоприборный завод" | Устройство дл бесконтакной плавки и очистки электропроводных материалов во взвешенном состо нии |
US5033948A (en) * | 1989-04-17 | 1991-07-23 | Sandvik Limited | Induction melting of metals without a crucible |
SU1697283A1 (ru) * | 1989-07-11 | 1991-12-07 | Ленинградский институт инженеров железнодорожного транспорта им.акад.В.Н.Образцова | Устройство дл плавки металла во взвешенном состо нии |
TW297050B (de) | 1995-05-19 | 1997-02-01 | Daido Steel Co Ltd | |
US6144690A (en) * | 1999-03-18 | 2000-11-07 | Kabushiki Kaishi Kobe Seiko Sho | Melting method using cold crucible induction melting apparatus |
KR19990033628U (ko) * | 1999-05-08 | 1999-08-16 | 김지순 | 고주파부양용해진공주조장치 |
KR100952904B1 (ko) * | 2008-12-30 | 2010-04-16 | 김차현 | 2단계 고주파 부양용해를 이용한 진공주조장치 및 주조방법 |
DE102011082611A1 (de) * | 2011-09-13 | 2013-03-14 | Franz Haimer Maschinenbau Kg | Induktionsspuleneinheit |
CN102519249A (zh) * | 2011-11-24 | 2012-06-27 | 吉林大学 | 压电超声波/高频电磁混合悬浮非接触熔炼的方法和装置 |
DE102017100836B4 (de) | 2017-01-17 | 2020-06-18 | Ald Vacuum Technologies Gmbh | Gießverfahren |
-
2018
- 2018-07-17 DE DE102018117300.8A patent/DE102018117300B3/de not_active Expired - Fee Related
-
2019
- 2019-07-09 JP JP2020567542A patent/JP6931749B1/ja active Active
- 2019-07-09 WO PCT/EP2019/068430 patent/WO2020016061A1/de unknown
- 2019-07-09 PT PT197395536T patent/PT3626028T/pt unknown
- 2019-07-09 CN CN201980014921.4A patent/CN111771425B/zh active Active
- 2019-07-09 SI SI201930003T patent/SI3626028T1/sl unknown
- 2019-07-09 RU RU2020125343A patent/RU2735331C1/ru active
- 2019-07-09 EP EP19739553.6A patent/EP3626028B1/de active Active
- 2019-07-09 US US17/049,526 patent/US11197351B2/en active Active
- 2019-07-09 PL PL19739553T patent/PL3626028T3/pl unknown
- 2019-07-09 ES ES19739553T patent/ES2803427T3/es active Active
- 2019-07-09 KR KR1020207024932A patent/KR102217611B1/ko active IP Right Grant
- 2019-07-15 TW TW108124860A patent/TWI727370B/zh active
Also Published As
Publication number | Publication date |
---|---|
PL3626028T3 (pl) | 2020-09-07 |
KR102217611B1 (ko) | 2021-02-19 |
US11197351B2 (en) | 2021-12-07 |
JP2021526302A (ja) | 2021-09-30 |
CN111771425B (zh) | 2021-05-14 |
SI3626028T1 (sl) | 2020-08-31 |
RU2735331C1 (ru) | 2020-10-30 |
WO2020016061A1 (de) | 2020-01-23 |
JP6931749B1 (ja) | 2021-09-08 |
CN111771425A (zh) | 2020-10-13 |
TWI727370B (zh) | 2021-05-11 |
KR20200105960A (ko) | 2020-09-09 |
PT3626028T (pt) | 2020-07-07 |
DE102018117300B3 (de) | 2019-11-14 |
EP3626028B1 (de) | 2020-06-03 |
TW202007225A (zh) | 2020-02-01 |
US20210251054A1 (en) | 2021-08-12 |
ES2803427T3 (es) | 2021-01-26 |
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