EP0971805B1 - Verfahren und giesseinrichtung für feinguss - Google Patents
Verfahren und giesseinrichtung für feinguss Download PDFInfo
- Publication number
- EP0971805B1 EP0971805B1 EP98906787A EP98906787A EP0971805B1 EP 0971805 B1 EP0971805 B1 EP 0971805B1 EP 98906787 A EP98906787 A EP 98906787A EP 98906787 A EP98906787 A EP 98906787A EP 0971805 B1 EP0971805 B1 EP 0971805B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- gas
- mould
- mold
- container
- 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.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases
-
- 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
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
Definitions
- the invention relates to a method for casting metallic objects in a casting device for investment casting with at least one casting mold, one device for pouring liquid metal into the mold and with devices for generating vacuum and pressure and a pouring device for Performing this procedure.
- Investment casting is the casting of jewelry, art objects or ornaments, as well as precise small parts for industry, especially from Gold, silver, platinum, bronze and other metals understood.
- They are pouring devices known in which a crucible and a mold in one Containers are arranged.
- the crucible is provided with an internal cavity Receiving raw material and equipped with a heating device, e.g. one provided electrical induction device.
- a heating device e.g. one provided electrical induction device.
- Can be used as pouring devices the known possibilities the known possibilities are used, the known example has a floor spout with a stopper.
- Below the crucible the mold is positioned, which is made of gas-permeable, porous material consists.
- the casting mold has a mold cavity, which mostly Allows casting of a plurality of individual parts in the same casting process, i.e.
- the mold cavity has a tree structure with a sprue.
- the production the mold is usually made using a plastic or wax model, and the shape can only be used once.
- the process of casting metallic objects in this known casting device are exposed several steps together. For the time being, the crucible is opened with the container open filled with raw material and the mold in the lower part of the container used. The lower part of the container is separated from the upper part.
- the upper part of the container is provided with a device for generating an overpressure and the lower part of the container with a device for generating negative pressure connected.
- the container is sealed gas-tight to initiate the pouring process and the melting process is initiated in the crucible.
- the stopper By opening of the stopper, the liquid melt flows into the mold cavity by pouring downwards the mold until it is completely filled.
- a vacuum which affects the porosity of the mold material also extends into the mold cavity.
- excess pressure becomes in the upper container space generated so this pressure also on the level of the melt in the pouring funnel the mold works.
- DE-A-3927 998 discloses such a precision casting device for manufacturing known from dental castings made of titanium or titanium alloys.
- this publication describe a method and an apparatus with which during during the casting process, an overpressure of at least 4 to 5 bar is generated.
- the sprue side with a heavy gas in the form of argon pressurized Such one Overpressure should be necessary to titanium or titanium alloys without blowholes and To be able to pour inclusions.
- the liquid melt may not be enough distribute quickly in the mold cavity. This has the consequence that some fine ramifications not filled out, or different structures of the frozen Metals occur because of the rate of cooling and the time of solidification are different in different areas of the mold cavity.
- the mold cavity of the casting mold and the surrounding space of the casting mold exposed to negative pressure.
- the openings and Openings in the at least partially porous and gas-permeable wall the mold is evacuated and air or other gas residues become from it sucked off porous openings.
- the mold cavity and the The surrounding area of the mold is flushed with a light gas with a low density, which has the advantage that this gas enters the pores in the wall of the Mold penetrates and fills it.
- a gas is selected as the light gas which has an atomic number between 1 and 10 and which has the highest possible flow rate of this gas caused by the pores in the wall of the mold.
- a particularly suitable one Gas from this group is helium. After flushing the mold cavity and the surrounding space of the mold with this light gas is at least vacuum is again generated in the mold cavity and then the liquid The melt is poured into the mold cavity. This filling process now takes place extraordinarily fast because the light gas, e.g. Helium, very easily and quickly through the pores in the wall of the casting mold are displaced and flow outwards can. This advantage is due to the high flow rate of the selected light gas caused by pores and capillary openings.
- the advantage is that in the individual areas of the mold cavity and no partial overpressure between the flowing liquid metal is built up, so that the liquid metal quickly and unhindered into the finest Ramifications of the mold cavity can flow. This alone will already improved shape accuracy and a higher casting speed. This also has the consequence that in all parts in the mold cavity a better one The structure of the cast objects is created. Once the mold cavity is complete is filled with liquid metal, the level of the melt in the pouring area of the mold cavity with another heavy gas with a higher density acted upon. This gas points towards the surrounding space of the mold overpressure.
- the Heavy gas can also be a gas mixture that has the same properties having.
- a particularly suitable gas from this group is argon, since it has the property only with a relatively low flow rate through the Flow pores of the wall of the mold.
- pressure equalization between the inner wall of the mold and the outer wall of the Casting is 8-10 times slower when one side is charged with argon than when helium is applied. This now has the advantage that the liquid Melt exposed to increased pressure in the mold cavity can be without the negative pressure in the surrounding space of the mold is noticeably reduced. This leads to an even better filling of the mold cavities and an improved structure of the cast objects.
- a pouring device which has two sources for different gases with different densities. Further advantages arise if the Casting mold is arranged in a first gas-tight container and the crucible and the pouring device in a second container separate from the first are arranged. The two containers are via connecting lines and Control valves connected to the first or second gas source and there are Pumps for generating a partial negative or positive pressure, as well as corresponding ones Control devices available. Will be in the area between the pouring spout a third on the crucible and the pouring opening on the casting mold Gas space formed, there is the advantage that this space is relatively small and thereby the pressure build-up over the gate after filling the Mold can be done faster and less gas is needed. Are here too appropriate control and connection facilities to the gas sources and / or provided for the first or second gas-tight container.
- the operation of the casting device according to the invention and the application of the The inventive method in this facility is carried out in a more expedient manner Way with a controller, which is a control program for performing the Procedure contains.
- the corresponding control valves are operated via this control and control devices between the gas sources and the gas-tight ones Containers controlled.
- This control can also control those known per se Take over melting and casting processes.
- the casting device shown in Fig. 1 consists of a container 5 with a Cover 24, the closure devices of this cover 24 not shown are.
- a casting mold 2 with a mold cavity 3 is positioned in the container 5.
- This casting mold 2 serves to metal objects, in the example shown, Cast off jewelry. There are a variety of objects around a central sprue with a sprue 17 arranged and biiden a tree-like structure.
- the casting mold 2 consists of a porous molding material, which is gas permeable. The shape is made in a known manner with the help of a wax model, which is produced after the casting mold 2 is melted out. Above the mold 2 is on an intermediate support Crucible 1 positioned.
- This crucible 1 comprises a collecting space 25 for raw material or molten metal and a pouring opening 14 in Bottom area of the crucible 1.
- This pouring opening 14 is with a Stopper 15 is closed and can be actuated 16 by a not shown, but known actuators are opened and closed.
- a heating device in the form of an induction coil arranged, which is also not shown in the example shown, but is known per se.
- the stopper 15 and the pouring opening 14, as well the actuation 16 form the pouring device 4.
- the interior 26 of the container 5 is closed gas-tight with the help of the cover 24. The interior 26 forms at the same time the surrounding space to the mold 2.
- a connecting line 19 connects this interior 26 to a first gas source 6, for example one Pressurized gas bottle containing helium.
- a Valve 22 is arranged, which has actuators and via control lines 23rd is connected to a controller 10.
- a further connecting line 11 the interior 26 of the first container 5 is connected to a vacuum pump 8, which are also connected to the controller 10 via a control line 23 is.
- a valve 21 with actuators and control lines for control 10 installed.
- the vacuum pump 8 can additionally be supplemented with a vacuum tank, not shown.
- the interior 26 of the container 5 is connected via a further connecting line 12 connected to a second gas source 7, which is argon in the example described contains.
- a second gas source 7 which is argon in the example described contains.
- Overpressure device 9 for example in the form of a pressure pump and a Valve 20 installed, these elements in turn via control lines 23 with the controller 10 are connected.
- the mold cavity 3 of the casting mold 2 is filled with metal and the mirror 18 of the poured-in melt can be seen in the pouring area 17.
- the mold cavity 3 is filled with liquid melt by the following method.
- the mold 2 is inserted into the container 5 and the collecting space 25 of the crucible 1 is filled with the necessary amount of raw material.
- Raw materials such as gold, silver or platinum are normally used to cast jewelry, whereby other materials can also be used and other objects, such as art objects or small industrial parts, can also be cast.
- the volume of the crucible 1 is approximately between 5 and 2000 cm 3 .
- the container 5 is then closed gas-tight with the lid 24 and the metal present in the crucible 1 is melted with the aid of the heating device, not shown.
- the entire interior 26 of the container 5 is evacuated to a vacuum of at least 100 mbar with the aid of the vacuum pump 8.
- the air that has entered during the filling of the container 5 is drawn out of the interior 26 and the mold cavity 3 and the pores in the wall of the mold 2 are also evacuated.
- a light gas with a low density in the example described helium, is let into the interior 26 of the container 5 via the valve 22 from the first gas source 6, and in particular the mold cavity 3 is flushed with this light gas .
- a slight negative pressure can still be maintained via the pump 8, so that the entire mold 2 is rinsed.
- the device is thus ready for a new casting process with a new, empty casting mold 2.
- the entire casting process is controlled by a control 10, for example a control computer, which is equipped with a corresponding control program and an input device.
- the program and thus the casting process can be adapted to the relevant boundary conditions.
- these changes are also taken into account by the controller 10.
- Fig. 2 shows an example of a casting device for investment castings, which opposite the example of FIG. 1 has advantageous additions.
- the pouring device consists of two containers, namely a first container 5 ', which receives the mold 2 and a second container 13 which the Crucible 1 picks up.
- the two containers 5 'and 13 are gas-tight with one another connectable, the corresponding connection devices not shown are.
- a lid 24 is in turn arranged on the second container 13, which is also gas-tight with the Container 13 is connectable.
- the container 13 has a bottom 27 in which at least one connecting channel 28 is arranged.
- the bottom 27 of the second Container 13 is located on a seal 29 on the upper surface 30 of the Mold 2 on.
- the casting mold 2 is in the example shown on a lifting and Lowering device 31 turned off, by means of which the casting mold 2 against the floor 27 and thus moved against the pouring opening 14 or moved away from it can be. This makes it possible to use the interior of the first container 5 ' the interior of the second container 13 with each other via the connecting channels 28 to connect when the mold 2 is lowered and not more on the seal 29.
- the crucible 1 is in the example shown not yet melted raw material, i.e. it is the initial state shown before the start of the melting process and the pouring process.
- the two Interiors of the first container 5 'and the second container 13 via the vacuum pump 8 and the connecting line 11 evacuated to a predetermined pressure.
- the interior of the container 5 ' forms the surrounding space Casting mold 2.
- the build-up of the negative pressure in the mold cavity 3 takes place via the Interior of the second container 13 and the connecting channels 28, which in the pouring area 17 of the mold 2 open.
- a second valve 32 is arranged in the connecting line 11 to the valve 21, which connects the pump 8 to the interior of the second container 13.
- the casting mold 2 rests on the seal 29 on the bottom 27, are to Evacuate both valves 21 and 32 open to both in the first container 5 ' to generate the desired negative pressure in the second container 13 and the to suck out undesired gases from the mold cavity 3.
- the evacuation can also be done with the mold 2 lowered, in which case only one of the two Valves 21 or 32 must be open.
- the mold 2 using the device 31 against the seal 29 driven.
- the valve 22 opened and the first gas source 6 is a light gas into the container 5 'and 13 embedded. Also in this example, helium is used as a light gas a low density is used.
- the time it takes for the easy one Gas has flowed through and filled the pores of mold 2 is of size the mold 2 and the chosen molding material.
- the flushing process is stopped by the valve 22 is closed.
- a additional valve 33 can be installed. In this case, during the rinsing process the valve 32 closed and a negative pressure continues via the valve 21 generated in the surrounding area of the mold 2.
- the light gas helium then flows into the second container 13 and via the connecting channels 28 in the mold cavity 3 and penetrates the mold 2 from the inside out.
- the valve 21 is closed before the pouring process begins and only a predetermined vacuum in the valve 32 Maintain mold cavity 3.
- the valve 32 is also closed and the valve 20 is opened. From the second gas source 7 and the connecting line 12 that heavy gas, in the example shown again argon, in the interior of the second container 13 admitted and this heavy gas is charged with argon The mirror of the melt in the pouring region 17 via the connecting channels 28 of the mold cavity 3.
- the overpressure device 9 is now in the second Container 13 in relation to the surrounding space of the mold 2 in the first container 5 'built up an overpressure. This in turn causes the liquid melt penetrates into the outermost regions of the mold cavity 3 in the mold cavity 3, since the light gas helium without much resistance over the pores of the mold 2 flows into the surrounding area. Because here the heavy gas argon only the pouring area 17 of the mold cavity 3 is applied, the outflow of lighter gas helium from the mold cavity 3 into the surrounding space of the Container 5 'relieved, since no excess pressure is built up around the mold 2.
- Fig. 3 shows an additionally improved embodiment in which between the first container 5 "and the second container 13 a third gas space 34 is formed.
- This third gas space 34 is between the bottom 27 of the second container 13 and an intermediate wall 35 on the first container 5 ".
- This intermediate wall 35 seals the upper surface 30 of the mold 2 against the surrounding space in the first container 5 ".
- the first container 5" and the second container 13 and the lid 24 are also in this embodiment Gas-tightly connected to one another via connecting means, not shown.
- the start of the pouring process is by means of the vacuum pump 8 and by opening the valves 21 and 32 in the two interior spaces of the two containers 5 ", or 13 generates a desired negative pressure of 60 mbar.
- the valve 21 remains open, so that due to the negative pressure in the surrounding space to the mold 2 in the first container 5 "the helium from the third gas space 34 via the mold cavity 3 outwards into the surrounding space Casting mold 2 flows. This ensures that the pores are completely flushed out and capillary openings in the walls of the mold 2 so that it is complete be filled with helium.
- the valve 22 closed in line 19 and pouring the liquid melt in the mold cavity 3 can be done in the manner already described.
- the third gas space 34 via the connecting line 12 ' directly the heavy gas in the form of argon fed. This in turn takes place via the valve 20, the second gas source 7 and the overpressure device 9.
- the desired overpressure in this example of 3000 mbar, in relation to the surrounding area to mold 2 in the first container 5 "is only built up in the third gas space 34. Since this third gas space 34 can be kept small, only a small amount of argon is required, and also the build-up of the desired overpressure can be done very quickly and done with little energy.
- This configuration of the pouring device leads to an optimization of the casting method according to the invention and the gas consumption of both heavy and light gas is reduced to one Minimum reduced.
- gas exchange combinations helium /
- gases such as nitrogen / argon or helium / nitrogen possible.
- mixed gases for example, is a combination of Nitrogen as a light gas, with carbon dioxide as a heavy gas.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dental Prosthetics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
- Fig. 1
- Eine erfindungsgemässe Giesseinrichtung in schematischer Darstellung,
- Fig. 2
- eine erfindungsgemässe Giesseinrichtung mit einem ersten und einem zweiten Behälter, und
- Fig. 3
- eine erfindungsgemässe Giesseinrichtung mit einem zusätzlichen dritten Gasraum.
Claims (11)
- Verfahren zum Giessen von metallischen Objekten in einer Giesseinrichtung für Feinguss, mit mindestens einer porösen Giessform (2), einer Einrichtung (4) zum Eingiessen von flüssigem Metall in die Giessform (2) und mit Einrichtungen zum Erzeugen von Vakuum und Druck, wobei vor dem Beginn des Giessvorganges im Formhohlraum (3) und im Umgebungsraum der Giessform (2) ein Unterdruck erzeugt wird, dann der Formhohlraum (3) und der Umgebungsraum der Giessform (2) mit einem leichten Gas, mit geringer Dichte, gespült wird, während des Spülens die Poren in den Wandungen der Giessform (2) mindestens teilweise mit dem leichten Gas gefüllt werden, anschliessend mindestens im Formhohlraum (3) erneut ein Unterdruck erzeugt wird, dann die flüssige Schmelze in den Formhohlraum (3) eingefüllt und der Formhohlraum (3) gefüllt wird, nach dem Füllen des Formhohlraumes (3) der Spiegel (18) der Schmelze im Eingussbereich (17) des Formhohlraumes (3) mit einem anderen, schweren Gas, mit höherer Dichte, beaufschlagt und im Gasraum mit dem schweren Gas gegenüber den Hohlräumen in den Poren der Giessform (2) ein Überdruck erzeugt wird.
- Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, dass als leichtes Gas ein Gas verwendet wird, dessen Dichte mindestens um den Faktor 1,2 kleiner ist als die Dichte des schweren Gases.
- Verfahren nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass als leichtes Gas ein Gas aus dem Periodensystem mit der Ordnungszahl 1 bis 10, beispielsweise Helium, und als schweres Gas ein Gas aus dem Periodensystem mit der Ordnungszahl von mindestens 7, beispielsweise Argon, verwendet wird , wobei das schwerere Gas eine höhere Ordnungszahl aufweist als das leichtere.
- Verfahren nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, dass vor dem Beginn des Giessvorganges ein Unterdruck von mindestens 100 mbar und am Ende des Giessvorganges im schweren Gas ein Überdruck gegenüber dem Druck in den Hohlräumen der Poren der Giessform (2) von mindestens 10 mbar erzeugt wird.
- Giesseinrichtung zur Durchführung des Verfahrens nach Patentanspruch 1, umfassend einen Schmelztiegel (1) mit einer Ausgussvorrichtung (4) und mindestens einer Giessform (2) mit einem Formhohlraum (3), wobei die Giessform (2) aus einem mindestens teilweise gasdurchlässigen Material besteht, diese Giessform (2) in einem gasdichten Behälter (5) angeordnet ist, dieser Behälter (5) mit einer ersten und einer zweiten Quelle (6, 7) für je unterschiedliche Gase verbunden ist, eine Verbindungsleitung (11) zu einer Pumpe (8) zum Erzeugen von Unterdruck im Behälter (5) vorhanden ist und in der Verbindungsleitung (12) zwischen Behälter (5) und zweiter Gasquelle (7) eine Einrichtung (9) zur Erzeugung von Überdruck angeordnet ist.
- Giesseinrichtung nach Patentanspruch 5, dadurch gekennzeichnet, dass der Schmelztiegel (1) und die Ausgussvorrichtung (4) in einem zweiten gasdichten Behälter (13) angeordnet sind und dieser Behälter (13) über ein Ventil (20) und eine Verbindungsleitung (12) mit der Einrichtung (9) zur Erzeugung von Überdruck verbunden ist.
- Giesseinrichtung nach Patentanspruch 5 oder 6, dadurch gekennzeichnet, dass zwischen der Ausgussöffnung (14) am Schmelztiegel (1) und der Eingussöffnung (17) an der Giessform (2) ein dritter Gasraum (34) ausgebildet ist.
- Giesseinrichtung nach einem der Patentansprüche 5 bis 7, dadurch gekennzeichnet, dass der Bereich der Ausgussöffnung (14) des Schmelztiegels (1) und der Bereich der Eingussöffnung (17) der Giessform (2) in Richtung der Giessachse gegeneinander verschiebbar sind.
- Giesseinrichtung nach Patentanspruch 8, dadurch gekennzeichnet, dass zwischen dem Bereich der Ausgussöffnung (14) des Schmelztiegels (1) und dem Bereich der Eingussöffnung (17) der Giessform (2) mindestens eine gasdichte Dichtung (29) angeordnet ist.
- Giesseinrichtung nach Patentanspruch 7, dadurch gekennzeichnet, dass der dritte Gasraum (34) über eine Verbindungsleitung (12') mit der Einrichtung (9) zur Erzeugung von Überdruck und/oder über eine Verbindungsleitung (36) mit der ersten Gasquelle (6) verbunden ist.
- Giesseinrichtung nach einem der Patentansprüche 5 bis 10, dadurch gekennzeichnet, dass die Einrichtung mit einer Steuerung (10) mit einem dem Verfahren gemäss Anspruch 1 entsprechenden Steuerprogramm und mit Steuerventilen (20, 21, 22, 32) in den Verbindungsleitungen (11, 12, 19) für die Gase ausgetattet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH76597 | 1997-04-03 | ||
CH76597 | 1997-04-03 | ||
PCT/CH1998/000103 WO1998045071A1 (de) | 1997-04-03 | 1998-03-17 | Verfahren und giesseinrichtung für feinguss |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0971805A1 EP0971805A1 (de) | 2000-01-19 |
EP0971805B1 true EP0971805B1 (de) | 2001-11-28 |
EP0971805B2 EP0971805B2 (de) | 2009-06-03 |
Family
ID=4194659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98906787A Expired - Lifetime EP0971805B2 (de) | 1997-04-03 | 1998-03-17 | Verfahren und giesseinrichtung für feinguss |
Country Status (6)
Country | Link |
---|---|
US (1) | US6253828B1 (de) |
EP (1) | EP0971805B2 (de) |
JP (1) | JP4275195B2 (de) |
CN (1) | CN1072071C (de) |
DE (1) | DE59802238D1 (de) |
WO (1) | WO1998045071A1 (de) |
Cited By (1)
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DE112006003535B4 (de) * | 2006-02-09 | 2010-11-25 | Otkrytoe Aktsionernoe Obschestvo "Novosibirsky Zavod Khimkontsentratov" | Vorrichtung zum Gießen mit verlorener Gießform bei einer Kristallisation unter Druck |
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DE10327165B4 (de) * | 2003-06-15 | 2008-08-07 | Kern Gmbh Magnesium-Giesstechnik | Vorrichtung zur Herstellung von Leichtmetallgusserzeugnissen |
US7258158B2 (en) | 2004-07-28 | 2007-08-21 | Howmet Corporation | Increasing stability of silica-bearing material |
JP4689342B2 (ja) * | 2005-05-09 | 2011-05-25 | 株式会社Ihi | 精密鋳造法及び精密鋳造品 |
US8030082B2 (en) | 2006-01-13 | 2011-10-04 | Honeywell International Inc. | Liquid-particle analysis of metal materials |
AT503391B1 (de) * | 2006-04-04 | 2008-10-15 | O St Feingussgesellschaft M B | Verfahren zum feingiessen von metallischen formteilen und vorrichtung hierfür |
JP4442598B2 (ja) * | 2006-10-12 | 2010-03-31 | トヨタ自動車株式会社 | 減圧鋳造方法、及び、減圧鋳造装置 |
US20090065354A1 (en) * | 2007-09-12 | 2009-03-12 | Kardokus Janine K | Sputtering targets comprising a novel manufacturing design, methods of production and uses thereof |
GB2454010B (en) * | 2007-10-26 | 2009-11-11 | Castings Technology Internat | Casting a metal object |
KR101225429B1 (ko) * | 2010-09-29 | 2013-01-22 | 현대제철 주식회사 | 턴디쉬용 상부노즐의 퍼징방법 |
CN102107259A (zh) * | 2010-12-08 | 2011-06-29 | 山东梦金园珠宝首饰有限公司 | 钵状饰品的浇注方法 |
US8151865B1 (en) | 2011-03-30 | 2012-04-10 | General Electric Company | Method and apparatus for casting filaments |
US8590595B2 (en) | 2011-03-30 | 2013-11-26 | General Electric Company | Casting methods and apparatus |
JP5328998B1 (ja) * | 2013-01-25 | 2013-10-30 | 株式会社石原産業 | 金属ガラスの鋳造装置及びそれを用いた鋳造方法 |
US9381569B2 (en) | 2013-03-07 | 2016-07-05 | Howmet Corporation | Vacuum or air casting using induction hot topping |
CN103433479B (zh) * | 2013-09-12 | 2015-07-08 | 河南正旭精密制造有限公司 | 一种薄壁零件铸造工艺及铸造舱 |
CN103706778A (zh) * | 2013-12-31 | 2014-04-09 | 大连福岛精密零部件有限公司 | 用非真空炉生产斯特林发动机高温合金部件的方法 |
KR101647205B1 (ko) * | 2014-11-20 | 2016-08-09 | 두산중공업 주식회사 | 진공 주조를 위한 불활성 기체의 취입 장치 |
CN105033200A (zh) * | 2015-09-18 | 2015-11-11 | 山东钢铁股份有限公司 | 一种真空冶炼铸造设备及工艺 |
US10675674B2 (en) * | 2016-06-13 | 2020-06-09 | Korea Institute Of Machinery & Materials | Casting mold for metal sheet |
CN108555256A (zh) * | 2018-06-11 | 2018-09-21 | 江苏集萃先进金属材料研究所有限公司 | 一种改善真空感应铸锭凝固质量的装置及其方法 |
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JPH0259168A (ja) * | 1988-08-25 | 1990-02-28 | Reiichi Okuda | 精密鋳造方法 |
EP0651220B1 (de) * | 1993-09-20 | 1999-11-24 | Peacock Limited L.C. | Brenn- und/oder Giess-ofen für Zahnersatzprodukte |
DE19505689C2 (de) † | 1995-02-20 | 2003-10-02 | Ald Vacuum Techn Ag | Gießform zum Herstellen von Gußteilen aus reaktiven Metallen |
EP0686443B1 (de) † | 1994-06-09 | 1999-11-10 | ALD Vacuum Technologies GmbH | Verfahren zum Herstellen von Gussteilen aus reaktiven Metallen und wiederverwendbare Giessform zur Durchführung des Verfahrens |
DE4420138C2 (de) † | 1994-06-09 | 1997-09-25 | Ald Vacuum Techn Gmbh | Verfahren zum Herstellen von Gußteilen aus reaktiven Metallen und aus Metall bestehende Kokille zur Durchführung des Verfahrens |
GB2294474B (en) † | 1994-10-26 | 1998-04-29 | Honda Motor Co Ltd | Method for forming an aluminium or aluminium alloy composite material. |
DE29502808U1 (de) † | 1995-02-21 | 1995-04-27 | Georg Schultheiss Electronic, 71292 Friolzheim | Aufnahmebehälter, insbesondere Vakuumbehälter, für eine Küvette |
JP3630383B2 (ja) * | 1996-12-24 | 2005-03-16 | 本田技研工業株式会社 | 金属・セラミックス複合材料の製造方法 |
-
1998
- 1998-03-17 EP EP98906787A patent/EP0971805B2/de not_active Expired - Lifetime
- 1998-03-17 US US09/381,734 patent/US6253828B1/en not_active Expired - Fee Related
- 1998-03-17 JP JP54220098A patent/JP4275195B2/ja not_active Expired - Fee Related
- 1998-03-17 CN CN98803885A patent/CN1072071C/zh not_active Expired - Fee Related
- 1998-03-17 WO PCT/CH1998/000103 patent/WO1998045071A1/de active IP Right Grant
- 1998-03-17 DE DE59802238T patent/DE59802238D1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112006003535B4 (de) * | 2006-02-09 | 2010-11-25 | Otkrytoe Aktsionernoe Obschestvo "Novosibirsky Zavod Khimkontsentratov" | Vorrichtung zum Gießen mit verlorener Gießform bei einer Kristallisation unter Druck |
Also Published As
Publication number | Publication date |
---|---|
CN1251543A (zh) | 2000-04-26 |
DE59802238D1 (de) | 2002-01-10 |
JP4275195B2 (ja) | 2009-06-10 |
EP0971805A1 (de) | 2000-01-19 |
WO1998045071A1 (de) | 1998-10-15 |
US6253828B1 (en) | 2001-07-03 |
EP0971805B2 (de) | 2009-06-03 |
JP2001518847A (ja) | 2001-10-16 |
CN1072071C (zh) | 2001-10-03 |
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