EP0971805B2 - Verfahren und giesseinrichtung für feinguss - Google Patents

Verfahren und giesseinrichtung für feinguss Download PDF

Info

Publication number
EP0971805B2
EP0971805B2 EP98906787A EP98906787A EP0971805B2 EP 0971805 B2 EP0971805 B2 EP 0971805B2 EP 98906787 A EP98906787 A EP 98906787A EP 98906787 A EP98906787 A EP 98906787A EP 0971805 B2 EP0971805 B2 EP 0971805B2
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
Application number
EP98906787A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0971805A1 (de
EP0971805B1 (de
Inventor
Christian Reiter
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.)
REITER, CHRISTIAN
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4194659&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0971805(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0971805A1 publication Critical patent/EP0971805A1/de
Application granted granted Critical
Publication of EP0971805B1 publication Critical patent/EP0971805B1/de
Publication of EP0971805B2 publication Critical patent/EP0971805B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 mold, a device for pouring liquid metal into the mold and with means for generating vacuum and pressure and a casting device for performing this method.
  • Investment casting is understood to mean the casting of pieces of jewelery, works of art or ornaments, as well as precision small parts for industry, in particular gold, silver, platinum, bronze and other metals.
  • casting devices in which a crucible and a mold are arranged in a container.
  • the crucible is equipped with an internal cavity for receiving raw material and equipped with a heater, e.g. an electrical induction device provided.
  • a heater e.g. an electrical induction device provided.
  • the known possibilities can be used, wherein the known example has a bottom spout with a stopper.
  • the mold is positioned, which consists of gas-permeable, porous material.
  • the mold has a mold cavity, which usually allows the casting of a plurality of individual parts in the same casting process, i. the mold cavity has a tree structure with a pouring funnel.
  • the production of the mold is usually done with the help of a plastic or wax model, and the form is used only once.
  • the method for casting metallic objects in this known casting device is composed of several steps. For the time being, when the container is open, the crucible is filled with raw material and the casting mold is inserted into the lower part of the container. The lower part of the container is separated from the upper part.
  • the upper container part is connected to a device for generating an overpressure and the lower container part to a device for generating negative pressure.
  • the container is sealed gas-tight and initiated the melting process in the crucible.
  • the stopper By opening the stopper, the liquid melt flows by falling casting into the mold cavity of the mold until it is completely filled.
  • the lower container part, in which the mold is is exposed to a negative pressure, which also expands via the porosity of the mold material into the mold cavity.
  • a negative pressure which also expands via the porosity of the mold material into the mold cavity.
  • an overpressure is generated in the upper container space, so that this pressure also acts on the mirror of the melt in the pouring funnel of the mold.
  • the liquid melt may spread too little in the mold cavity.
  • partial fine ramifications are not filled, or different structures of the solidified metal occur, since the cooling rate and the solidification time are different in different areas of the mold cavity.
  • the mold cavity of the mold and the surrounding space of the mold is exposed to a negative pressure before the start of the casting process, ie before pouring liquid melt into the mold cavity.
  • the openings and passages in the at least partially porous and gas-permeable wall of the mold are evacuated and air or other gas residues are sucked out of these porous openings.
  • the mold cavity and the surrounding space of the mold is purged with a light gas of low density, which provides the advantage that this gas penetrates into the pores in the wall of the mold and fills them.
  • a gas is selected as the light gas, which in the periodic table of the elements has an atomic number between 1 and 10 and which causes the highest possible flow rate of this gas through the pores in the wall of the mold.
  • a special suitable gas from this group is helium. After rinsing the mold cavity and the ambient space of the mold with this light gas, a negative pressure is again generated at least in the mold cavity and then filled the liquid melt in the mold cavity. This filling process is now extremely fast, because the light gas, such as helium, is very easily and quickly displaced by the pores in the wall of the mold and can flow to the outside. This advantage is brought about by the high flow rate of the selected light gas through pores and capillary openings.
  • the advantage is that no partial overpressure is built up in the individual regions of the mold cavity and between the inflowing liquid metal, so that the liquid metal can flow quickly and unhindered into the finest branches of the mold cavity. This alone achieves improved form accuracy and a higher casting speed. This also has the consequence that in all parts of the mold cavity, a better structure of the cast objects arises.
  • the heavy gas As a heavy gas with a higher density while a gas is selected, which has an atomic number of at least 7 in the periodic table of the elements and in any case has a higher atomic number than the light gas with which is purged in the previous process step.
  • the heavy gas may also be a gas mixture which has the same properties.
  • a particularly suitable gas from this group is argon, since it has the property of flowing through the pores of the wall of the mold only at a relatively low flow rate.
  • a casting device which has two sources for different gases of different density. Further advantages arise when the mold is arranged in a first gas-tight container and the crucible and the pouring device are arranged in a second, separate from the first container.
  • the two containers are connected via connecting lines and control valves to the first or second gas source and there are pumps for generating a partial negative or positive pressure, and corresponding control devices. If a third gas space is formed in the region between the spout opening on the crucible and the sprue opening on the casting mold, there is the advantage that this space is relatively small and thus the pressure build-up above the sprue can be faster after the casting mold has been filled and less gas is required becomes.
  • corresponding control and connection devices to the gas sources and / or to the first or second gas-tight container are provided.
  • the region of the pouring opening of the crucible and the region of the pouring opening of the casting mold are displaceable relative to one another in the direction of the casting axis.
  • this allows better accessibility to the casting mold and crucible and, on the other hand, joining or separating the first or second or third container from one another.
  • This by moving the device parts with the crucible or the device parts with the mold against each other. For sealing, at least one gas-tight seal is formed between these parts of the device.
  • the operation of the inventive casting device and the application of the inventive method in this device is carried out in an expedient manner with a controller which contains a control program for performing the method.
  • This control controls the appropriate control valves and controls between the gas sources and the gas tight containers.
  • This control can also take over the control of the known melting and Abgussvortician.
  • a mold 2 is positioned with a mold cavity 3.
  • This mold 2 serves to drain metallic objects, in the example shown, jewelry.
  • a plurality of objects are arranged around a central sprue with a sprue area 17 and biiden a tree-like structure.
  • the mold 2 consists of a porous molding material which is gas-permeable. The mold is produced in a known manner with the aid of a wax model which is melted out after the casting mold 2 has been produced.
  • a crucible 1 is positioned on an intermediate carrier.
  • This crucible 1 comprises a collecting space 25 for raw material or molten metal and a spout opening 14 in the bottom region of the crucible 1.
  • This spout 14 is closed with a stopper 15 and can be opened by an actuator 16 by not shown, but known actuators and getting closed.
  • a heating device in the form of an induction coil is arranged, which is also not shown in the example shown, but is known per se.
  • the stopper 15 and the spout opening 14, as well as the actuator 16 form the spout 4.
  • the interior 26 of the container 5 is sealed gas-tight by means of the lid 24. The interior 26 simultaneously forms the ambient space to the mold 2.
  • a connecting line 19 connects this interior space 26 with a first gas source 6, for example a compressed gas cylinder containing helium.
  • a valve 22 is arranged, which has actuators and is connected via control lines 23 to a controller 10.
  • the interior 26 of the first container 5 is connected to a vacuum pump 8, which is also connected via a control line 23 to the controller 10.
  • a valve 21 with actuators and control lines to the controller 10 is also installed.
  • the vacuum pump 8 may additionally be supplemented with a vacuum tank, not shown.
  • the interior 26 of the container 5 is connected to a second gas source 7, which contains argon in the example described.
  • a second gas source 7 which contains argon in the example described.
  • an overpressure device 9 for example in the form of a pressure pump and a valve 20 is installed, these elements in turn being connected via control lines 23 to the controller 10.
  • the mold cavity 3 of the mold 2 is filled with metal and in the runner 17, the mirror 18 of the cast melt is visible.
  • the filling of the mold cavity 3 with liquid melt takes place according to the following method.
  • the mold 2 is inserted into the container 5 and the collecting space 25 of the crucible 1 filled with the necessary amount of raw material.
  • raw materials such as gold, silver or platinum use, whereby other materials used and other objects, such as art objects or small industrial parts can be poured.
  • the volume of the crucible 1 is approximately between 5 to 2000 cm 3 .
  • the container 5 is sealed gas-tight with the lid 24 and melted in the crucible 1 metal using the heating device, not shown.
  • the entire interior 26 of the container 5 is evacuated with the aid of the vacuum pump 8 to a negative pressure of at least 100 mbar.
  • a negative pressure of at least 100 mbar.
  • the air which has entered during the filling of the container 5 is drawn off from the interior space 26 and the mold cavity 3 and also the pores in the wall of the casting mold 2 are evacuated.
  • a light gas is introduced via the valve 22 from the first gas source 6 with a low density, helium in the example described in the interior 26 of the container 5 and in particular the mold cavity 3 rinsed with this light gas ,
  • a small negative pressure can continue to be maintained via the pump 8, so that the rinsing of the entire casting mold 2 is ensured.
  • an overpressure of 1000 mbar is applied and this overpressure acts directly on the mirror 18 of the melt in the mold cavity 3.
  • the melt in the mold cavity 3 is pressed into the outermost regions of the mold cavity 3 and the light gas helium is completely forced out of the mold cavity 3 displaced.
  • the heavy gas argon has the property that it only very poorly penetrates into the pores of the mold 2 and therefore the pressure build-up initially acts only on the mirror 18 of the melt in the mold cavity and only reduced over the wall as a back pressure.
  • the device for a new casting process with a new, empty mold 2 is ready.
  • the control of the entire casting process via a controller 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 corresponding boundary conditions.
  • other gases in the first or second gas source 6, 7 are used, these changes are also taken into account by the controller 10.
  • Fig. 2 shows an example of a casting device for investment casting, which compared to the example according to Fig. 1 having advantageous supplements.
  • the casting device consists of two containers, namely a first container 5 ', which receives the mold 2 and a second container 13, which receives the crucible 1.
  • the two containers 5 'and 13 are gas-tight connected to each other, wherein the corresponding connection means are not shown.
  • a lid 24 is arranged, which is connectable via not shown connecting means gas-tight with the container 13.
  • 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 rests on a seal 29 on the upper surface 30 of the mold 2.
  • the mold 2 is turned off in the example shown on a lifting and lowering device 31, by means of which the mold 2 against the bottom 27 and thus driven against the spout opening 14 or can be moved away from it.
  • This makes it possible to connect the interior of the first container 5 'with the interior of the second container 13 via the connecting channels 28 with each other when the mold 2 is lowered down and no longer abuts the seal 29.
  • the crucible 1 not yet melted raw material is filled in the example shown, ie it is the initial state before the start of the melting process and the Abgiessvorganges shown.
  • the two inner spaces of the first container 5 'and the second container 13 are evacuated via the vacuum pump 8 and the connecting pipe 11 to a predetermined pressure.
  • the interior of the container 5 ' forms the surrounding space to the mold 2.
  • a second valve 32 is arranged, which connects the pump 8 with the interior of the second container 13.
  • both valves 21 and 32 are opened to evacuate both in the first container 5 'as well as in the second container 13 to generate the desired negative pressure and to suck the unwanted gases from the mold cavity 3 .
  • the evacuation can also be done with lowered mold 2, in which case only one of the two valves 21, or 32 must be open.
  • the mold 2 is moved in this case by means of the device 31 against the seal 29.
  • the valve 22 is opened and from the first gas source 6, a light gas in the container 5 'and 13 is admitted.
  • helium is used as a light gas with a low density.
  • the time required for the light gas to flow through and fill the pores of the casting mold 2 depends on the size of the casting mold 2 and the molding material selected.
  • the purging operation is stopped by closing the valve 22.
  • an additional valve 33 can be installed.
  • the valve 32 is closed during the flushing process and continues to generate a negative pressure in the ambient space of the mold 2 via the valve 21.
  • the light gas helium then flows into the second container 13 and via the connecting channels 28 in the mold cavity 3 and penetrates from the inside to the outside of the mold 2.
  • the valve 21 is closed before the start of Abgiessvorganges and only via the valve 32 a maintained predetermined negative pressure in the mold cavity 3.
  • the valve 32 is closed and the valve 20 is opened.
  • the heavy gas, again argon, in the interior of the second container 13 is admitted and this heavy gas argon charged via the connecting channels 28, the mirror of the melt in the gate 17 of the mold cavity.
  • an overpressure built is now in the second container 13 with respect to the ambient space of the mold 2 in the first container 5 ', an overpressure built.
  • This causes the liquid melt in the mold cavity 3 to penetrate into the outermost regions of the mold cavity 3, since the light gas drains off helium without great resistance via the pores of the mold 2 into the surrounding space.
  • the heavy gas argon acts only on the sprue area 17 of the mold cavity 3, the outflow of the lighter gas helium from the mold cavity 3 into the surrounding space of the container 5 'is facilitated since no overpressure is built up around the mold 2.
  • Fig. 3 shows an additionally improved embodiment in which a third gas space 34 is formed between the first container 5 "and the second container 13.
  • This third gas space 34 is formed 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 casting mold 2 against the surrounding space in the first container 5 ".
  • the first container 5" and the second container 13, as well as the cover 24, are also not shown in this embodiment connection means connected in a gastight manner.
  • this embodiment has the additional advantage that the air or other gases present in the mold cavity 3 are sucked outwards in any case
  • the valve 22 is opened, and from the first gas source 6 via the conduit 19, the light gas in the form of helium in the interior of the container 13 and the third gas space 34.
  • connection line 36 between the line 19 and the third gas space 34 at The valve 21 remains open, so that due to the negative pressure in the ambient space to the mold 2 in the first container 5 ", the helium from the third gas space 34 flows through the mold cavity 3 to the outside in the surrounding space of the mold 2. This ensures complete purging of the pores and capillary openings in the walls of the mold 2, so that they are completely filled with helium.
  • the valve 22 is closed in the conduit 19 and the pouring of the liquid melt into the mold cavity 3 can be carried out in the manner already described. As soon as the mold cavity 3 is filled with liquid melt, the heavy gas in the form of argon is fed directly to the third gas space 34 via the connecting line 12 '.
  • the desired overpressure in this example of 3000 mbar, compared to the ambient space to the mold 2 in the first container 5 "is thereby built only in the third gas space 34. Since this Only a small amount of argon is required for the third gas space 34, and the construction of the desired overpressure can also take place very quickly and with little expenditure of energy even the light gas is reduced to a minimum.
  • helium / argon In place of the gas exchange combinations helium / argon mentioned for the examples, various other combinations are possible. If pure gases are used, combinations such as nitrogen / argon or helium / nitrogen are possible, for example. With mixed gases, for example, a combination of nitrogen can be used as a light gas, with carbon dioxide as a heavy gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dental Prosthetics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP98906787A 1997-04-03 1998-03-17 Verfahren und giesseinrichtung für feinguss Expired - Lifetime EP0971805B2 (de)

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 EP0971805B1 (de) 2001-11-28
EP0971805B2 true 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 (enExample)
EP (1) EP0971805B2 (enExample)
JP (1) JP4275195B2 (enExample)
CN (1) CN1072071C (enExample)
DE (1) DE59802238D1 (enExample)
WO (1) WO1998045071A1 (enExample)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
RU2312738C1 (ru) * 2006-02-09 2007-12-20 Открытое акционерное общество "Новосибирский завод химконцентратов" Способ литья по выплавляемым моделям с кристаллизацией под давлением и устройство для его осуществления
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
US8590595B2 (en) 2011-03-30 2013-11-26 General Electric Company Casting methods and apparatus
US8151865B1 (en) 2011-03-30 2012-04-10 General Electric Company Method and apparatus for casting filaments
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
WO2017217733A1 (ko) * 2016-06-13 2017-12-21 한국기계연구원 금속 판재의 주조 금형
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
JP7367640B2 (ja) * 2020-09-02 2023-10-24 トヨタ自動車株式会社 鋳巣解析方法、プログラム、及び鋳造条件導出方法
DE102024000339A1 (de) 2024-02-02 2024-11-28 Mercedes-Benz Group AG Verfahren zum Ausgestalten eines Gussbauteils und Gussbauteil

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335711A (en) † 1987-05-30 1994-08-09 Ae Plc Process and apparatus for metal casting
DE4433373A1 (de) † 1993-09-20 1995-03-23 Orotig S R L Ofen zum Brennen und/oder Gießen von zahnprothetischen Produkten
EP0686443A1 (de) † 1994-06-09 1995-12-13 ALD Vacuum Technologies GmbH Verfahren zum Herstellen von Gussteilen aus reaktiven Metallen und wiederverwendbare Giessform zur Durchführung des Verfahrens
DE4420138A1 (de) † 1994-06-09 1995-12-14 Leybold Durferrit Gmbh Verfahren zum Herstellen von Gußteilen aus reaktiven Metallen und aus Metall bestehende Kokille zur Durchführung des Verfahrens
DE19539922A1 (de) † 1994-10-26 1996-05-02 Honda Motor Co Ltd Verfahren und Vorrichtung zur Bildung eines Aluminiumlegierungs-Verbundmaterials
DE19505689A1 (de) † 1995-02-20 1996-08-22 Ald Vacuum Techn Gmbh Gießform zum Herstellen von Gußteilen aus reaktiven Metallen
EP0728547A2 (de) † 1995-02-21 1996-08-28 Georg Schultheiss Electronic Aufnahmebehälter, insbesondere Vakuumbehälter, für eine Küvette

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5312726A (en) * 1976-07-22 1978-02-04 Kubota Ltd Method of preventing oxidation of casting
GB8712743D0 (en) * 1987-05-30 1987-07-01 Ae Plc Casting method
JPH0259168A (ja) * 1988-08-25 1990-02-28 Reiichi Okuda 精密鋳造方法
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5335711A (en) † 1987-05-30 1994-08-09 Ae Plc Process and apparatus for metal casting
DE4433373A1 (de) † 1993-09-20 1995-03-23 Orotig S R L Ofen zum Brennen und/oder Gießen von zahnprothetischen Produkten
EP0686443A1 (de) † 1994-06-09 1995-12-13 ALD Vacuum Technologies GmbH Verfahren zum Herstellen von Gussteilen aus reaktiven Metallen und wiederverwendbare Giessform zur Durchführung des Verfahrens
DE4420138A1 (de) † 1994-06-09 1995-12-14 Leybold Durferrit Gmbh Verfahren zum Herstellen von Gußteilen aus reaktiven Metallen und aus Metall bestehende Kokille zur Durchführung des Verfahrens
DE19539922A1 (de) † 1994-10-26 1996-05-02 Honda Motor Co Ltd Verfahren und Vorrichtung zur Bildung eines Aluminiumlegierungs-Verbundmaterials
DE19505689A1 (de) † 1995-02-20 1996-08-22 Ald Vacuum Techn Gmbh Gießform zum Herstellen von Gußteilen aus reaktiven Metallen
EP0728547A2 (de) † 1995-02-21 1996-08-28 Georg Schultheiss Electronic Aufnahmebehälter, insbesondere Vakuumbehälter, für eine Küvette

Also Published As

Publication number Publication date
CN1072071C (zh) 2001-10-03
CN1251543A (zh) 2000-04-26
EP0971805A1 (de) 2000-01-19
DE59802238D1 (de) 2002-01-10
US6253828B1 (en) 2001-07-03
JP2001518847A (ja) 2001-10-16
JP4275195B2 (ja) 2009-06-10
WO1998045071A1 (de) 1998-10-15
EP0971805B1 (de) 2001-11-28

Similar Documents

Publication Publication Date Title
EP0971805B2 (de) Verfahren und giesseinrichtung für feinguss
DE60111190T2 (de) Verfahren und vorrichtung zur herstellung von gegossenen schaumkörpern
DE3815828C2 (enExample)
DE4034418A1 (de) Verfahren und vorrichtung zum giessen von metall gegen die schwerkraft
DE68911230T2 (de) Unterdruckgiessverfahren und Vorrichtung.
CH654768A5 (de) Entgasungsvorrichtung an einer druck- oder spritzgiessform.
DE69318519T2 (de) Vorrichtung zum Giessen von Nichteisenmetallen in Sandformen mittels Nachdruck
DE3534029A1 (de) Giesseinrichtung und -verfahren
DE3927998A1 (de) Praezisions-giessverfahren und vorrichtung zu seiner durchfuehrung
DE3705710C2 (enExample)
EP0061532B1 (de) Druckgiessmaschine
DE4326982C1 (de) Verfahren und Vorrichtung zur Herstellung von Formteilen aus Metallschaum
DE4116071A1 (de) Verfahren zum vergiessen von dentalmetallen
DE10025014C2 (de) Vorrichtung zur Herstellung von Leichtmetallgußerzeugnissen, insbesondere von Teilen aus Magnesium bzw. Magnesiumlegierungen
DE60133639T2 (de) Unterdruckgiessverfahren und vorrichtung
DE2400250B2 (de) Verfahren und vorrichtung zum giessen von metallen und metall-legierungen
DE2428263B2 (de) Gießvorrichtung und Verfahren zu deren Betrieb
DD246928A5 (de) Drehbare zufuehrungsvorrichtung fuer fluessiges gusseisen einer kontinuierlichen vertikalen abstichanlage fuer ein gusseisernes rohr mit sphaeroilitischen graphit
DE3873994T2 (de) Verfahren und vorrichtung zum metallgiessen.
DE69225063T2 (de) Differentialdruck-Gegenschwerkraftgiessen
DE69424835T2 (de) Giessvorrichtung mit vakuumabsaugung
DD265994A3 (de) Druckgiessverfahren
DE68924941T2 (de) Gegenschwerkraft-Giesseinrichtung und Verfahren zum Giessen dünnwandiger Teile.
DE2706721A1 (de) Verfahren und vorrichtung zum porenfreien druckgiessen
DE69924726T2 (de) Feingiessen unter verwendung einer abdichtbaren druckkappe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990928

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE IT LI

ITCL It: translation for ep claims filed

Representative=s name: INTERPATENT ST.TECN. BREVETTUALE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20010403

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE IT LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59802238

Country of ref document: DE

Date of ref document: 20020110

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: WERNER BRUDERER PATENTANWALT

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: SCHULTHEISS GMBH

Effective date: 20020812

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLAY Examination report in opposition despatched + time limit

Free format text: ORIGINAL CODE: EPIDOSNORE2

PLAY Examination report in opposition despatched + time limit

Free format text: ORIGINAL CODE: EPIDOSNORE2

PLAT Information related to reply to examination report in opposition deleted

Free format text: ORIGINAL CODE: EPIDOSDORE3

PLBC Reply to examination report in opposition received

Free format text: ORIGINAL CODE: EPIDOSNORE3

PLBC Reply to examination report in opposition received

Free format text: ORIGINAL CODE: EPIDOSNORE3

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: REITER, CHRISTIAN

Owner name: YASUI, SHOUZUI

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

APAL Date of receipt of statement of grounds of an appeal modified

Free format text: ORIGINAL CODE: EPIDOSCNOA3O

APAY Date of receipt of notice of appeal deleted

Free format text: ORIGINAL CODE: EPIDOSDNOA2O

APBA Date of receipt of statement of grounds of appeal deleted

Free format text: ORIGINAL CODE: EPIDOSDNOA3O

APBM Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNO

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUEA

Owner name: CHRISTIAN REITER

Free format text: YASUI, SHOUZUI#4-16-7, EIFUKU#SUGINAMI-KU, TOKYO 168 (JP) $ REITER, CHRISTIAN#ROOM NO. 501, GRACE COURT, 3-40-26, TAMAGAWA#SETAGAWA, TOKYO 158 (JP) -TRANSFER TO- CHRISTIAN REITER#BIELSTRASSE 98#4500 SOLOTHURN (CH)

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: REITER, CHRISTIAN

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20090603

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE IT LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20090216

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100317

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110322

Year of fee payment: 14

Ref country code: IT

Payment date: 20110318

Year of fee payment: 14

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20110616

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 59802238

Country of ref document: DE

Representative=s name: MEISSNER BOLTE PATENTANWAELTE RECHTSANWAELTE P, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 59802238

Country of ref document: DE

Representative=s name: MEISSNER, BOLTE & PARTNER GBR, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59802238

Country of ref document: DE

Effective date: 20121002

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120317

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121002