EP1900458A1 - Giessvorrichtung zum Giessen von Metallschmelzen - Google Patents

Giessvorrichtung zum Giessen von Metallschmelzen Download PDF

Info

Publication number
EP1900458A1
EP1900458A1 EP06425638A EP06425638A EP1900458A1 EP 1900458 A1 EP1900458 A1 EP 1900458A1 EP 06425638 A EP06425638 A EP 06425638A EP 06425638 A EP06425638 A EP 06425638A EP 1900458 A1 EP1900458 A1 EP 1900458A1
Authority
EP
European Patent Office
Prior art keywords
crucible
cast iron
casting
liquid
previous
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.)
Withdrawn
Application number
EP06425638A
Other languages
English (en)
French (fr)
Inventor
Guido Calamari
Mario Grigoletto
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.)
Calamari SpA
Progelta Srl
Original Assignee
Calamari SpA
Progelta Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calamari SpA, Progelta Srl filed Critical Calamari SpA
Priority to EP06425638A priority Critical patent/EP1900458A1/de
Publication of EP1900458A1 publication Critical patent/EP1900458A1/de
Withdrawn legal-status Critical Current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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • 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
    • B22D39/04—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/20—Stopper-rod operating equipment

Definitions

  • the present invention relates to an apparatus for casting metal materials, in particular nodular cast iron, of the type specified in the preamble of claim 1.
  • cast iron is an iron-carbon alloy with a high carbon content. Due to the high amount of carbon, this clusters into graphite lamellae or spheroids inside the iron matrix.
  • nodular cast iron has elements in spheroidal graphite. It therefore has improved mechanical properties compared to lamellar cast iron, as spheroidal discontinuities have higher mechanical tolerances than lamellar discontinuities. Moreover, nodular cast iron still has the advantages of castability, workability and low costs of cast irons in general.
  • nodular cast iron is increasingly used to produce mechanical elements such as engines and the like.
  • Nodular cast iron is commonly produced in specific furnaces and subsequently cast, through ladles or the like, into specific molds.
  • nodular cast iron has noteworthy drawbacks during production and casting.
  • nodular cast iron is not particularly stable when in molten state. It deteriorates rapidly into lamellar cast iron and must therefore be cast rapidly into the specific molds.
  • nodular cast iron in molten state can be reduced by keeping it at a specific temperature, but even in this situation nodular cast iron remains unstable, although to a lesser extent.
  • the technical aim underlying the present invention is to devise an apparatus for casting metal materials, in particular nodular cast iron, capable of substantially overcoming the aforesaid drawbacks.
  • an important object of the invention is to produce a casting apparatus that makes it possible to produce high quality metal elements, particularly nodular cast iron elements, at moderate costs.
  • Another important object of the invention is to obtain a casting apparatus that allows optimum casting, without slag inclusions and the like.
  • Last but not least object of the invention is to produce a casting apparatus which adapts to molds, and in particular to sequences of molds, of different types and dimensions.
  • Last but not least object of the invention is to produce a casting apparatus that adapts to production furnaces of different types and dimensions.
  • the apparatus according to the invention is indicated as a whole with the numeral 1 .
  • This crucible 2 comprises a crucible 2 to collect the liquid metal, in particular liquid nodular cast iron.
  • This crucible 2 is suitable to store the liquid nodular cast iron coming from a production furnace and to cast it into specific molds 3 or the like.
  • the liquid cast iron is fed to the crucible 2 opportunely by means of a charge channel 20 of the liquid metal.
  • the charge channel 20 is also preferably removable and detachable from the apparatus 1.
  • the crucible 2 has a cylindrical shape and a capacity ranging from 0.5 t to 1.5 t of liquid cast iron, preferably approximately 1 t. It also has a diameter ranging from 600 mm to 700 mm and a height ranging from 550 mm to 670 mm.
  • the inner wall of the crucible 2 is realized by refractory material of known type.
  • the apparatus 1 also comprises means 4 to heat the liquid cast iron contained inside the crucible 2.
  • the heating means 4 heat the liquid cast iron opportunely by means of the known electromagnetic induction process.
  • This process is based on the physical principle of electromagnetism wherein a conducting coil through which an alternating electromagnetic current passes, creates an electromagnetic field in the areas surrounding the coil, in particular inside the virtual cylinder delimited by the coil. Consequently, through the Joule effect, the electromagnetic field heats the materials it passes through.
  • the heating means 4 therefore comprise a coil 5 through which an alternating current passes with frequencies ranging from 200 Hz to 300 Hz, preferably approximately 250 Hz, and with powers ranging from 100 kW to 200 kW, preferably around 150 kW.
  • the coil 5 is connected to a specific control unit 6 of the apparatus 1.
  • the control unit 6 is connected to the electricity network and supplies the coil 5 with alternating electrical current of adequate powers and frequencies.
  • control unit 6 is electrically connected to the coil 5 by means of specific liquid cooled electrical cables 7 .
  • the electrical cables 7 comprise therewithin copper wires or the like, to conduct the alternating electrical current, and pipes, surrounding the copper wires, containing the cooling liquid and suitable to cool the copper wires.
  • the liquid cooled electrical cables 7 are connected to the coil 5 by means of releasable connections, in particular by means of quick-disconnect releasable connections.
  • the coil 5, supplied electrically by the electrical cables 7, is also liquid cooled. It is opportunely realized by a hollow copper pipe, inside which the cooling liquid flows.
  • This circuit 5a is connected to the control unit 6 and comprises an inlet pipe that connects the control unit 6 to the coil 5, the cavity inside said coil 5, and an outlet pipe that connects the coil to the control unit 6.
  • the inlet and outlet pipes are connected to the coil 5 by releasable connections, in particular by two threaded connections.
  • the crucible 2 comprising the heating means 4, substantially realizes a furnace, in particular a medium frequency induction furnace. Similar furnaces are known per se and utilized to produce specific metals. They have various advantages, including the absence of contact between the conductor material and the heated metal and the fact that they keep a uniform temperature inside the molten metal.
  • the crucible 2 also comprises a feed channel 15 , suitable to allow feed of inoculants or the like into the molten metal contained inside the crucible 2.
  • the crucible 2 also comprises a casting system 8 located on the base of the crucible 2 which preferably extends in the horizontal plane.
  • the casting system 8 comprises a casting hole 9 , produced on the base of the crucible 2, and a casting channel 10 , which surrounds the hole 9 and is made of refractory material, preferably graphite.
  • the hole 9 opportunely has a circular section which in a first stretch tapers from the base of the crucible 2 downwards, while in a second stretch it remains constant.
  • the casting hole 9 is located in an eccentric position on the base of the crucible 2, i.e. in an intermediate position between the center and the walls of the crucible 2, preferably in an intermediate position between the center of the base of the crucible and the perimeter portion of the crucible 2 diametrically opposite the charge channel 20.
  • This solution achieves two important advantages: in the first place, as the hole is not positioned at the center of the base of the crucible 2 it does not excessively weaken said base; in the second place, the liquid cast iron supplied through the charge channel 20 does not flow directly into the crucible at the level of the casting hole 9, but at the level of the refractory forming the base of the crucible 2.
  • the casting system 8 also comprises a closing device 11 of the hole 9.
  • This closing device 11 opportunely comprises a rod 12 , which can be inserted in the hole 9 so as to completely block it.
  • the rod 12 has a pointed end section which is inserted inside the first stretch of the casting hole 9.
  • the rod 12 realized by refractory material, extends in a direction substantially perpendicular to the base of the crucible 2 and therefore in a vertical direction, and passes through the inside of said crucible 2 containing the liquid metal.
  • the rod 12 is operated by a control mechanism 13 , which is part of the closing device 11, and comprising a brushless electric motor, suitable to lift and lower the rod 12.
  • the control mechanism 13 is connected to the control unit 6 through which it, and consequently the closing device 11, can be operated.
  • a video camera 21 suitable to detect correct relative positioning of the hole 9 and of the mold 3 and correct and complete filling of the mold 3, is opportunely positioned at the level of the casting channel 10, in the lower part thereof.
  • the crucible 2 is also opportunely positioned on a specific supporting structure 14 .
  • the purpose of this structure 14 is to allow the molds 3 or the like to be inserted under the crucible 2, so that the liquid cast iron can flow into them.
  • the structure 14 in the case in which parts of engines for automobiles or the like are being cast and a train of molds is present, has a height ranging from 1.5 to 2.5 m.
  • the supporting structure 14 comprises load cells 22 ( Figure 3) located under the crucible 2.
  • the load cells 22 are suitable to detect the mass of the crucible 2, and consequently the presence and quantity of liquid cast iron inside it.
  • the load cells 22 are also connected to the control unit 6.
  • the supporting structure 14 also comprises means 16 ( Figure 4) to move the crucible 2 in the plane parallel to the base of the crucible 2, i.e. substantially in the horizontal plane.
  • the moving means 16 are also opportunely connected and controlled by the control unit 6.
  • This moving means 16 opportunely comprise two pairs of rails 17 , perpendicular to each other and defining two axes of movement 17a and 17b , a plurality of wheels 18 movable on the rails 17, and at least one electric motor 19 , suitable to allow rotation of the wheels 18 and relative movement of the structure 14 and crucible 2.
  • the moving means 16 are suitable to allow, along the first axis of movement 17a, travel ranging from 0.2 m to 0.3 m in both directions and, along the second axis of movement 17b, travel ranging from 0.2 m to 0.3 m in one direction, and from 1.0 m to 1.4 m in the other direction.
  • the cast iron in particular nodular cast iron, is produced in the furnace and poured, through the charge channel 20, into the crucible 2.
  • the quantity of cast iron fed in is measured and regulated through the load cells 22 and the control unit 6.
  • the liquid cast iron is kept at a constant temperature in the crucible 2 by the heating means 4 described. These heating means 4 are consequently active and supplied by the supply means 6. Moreover, the casting system 8 is in the closed position; therefore, the rod 12, which is part of the closing device 11, is inserted in the casting hole 9, and prevents the liquid metal from passing through.
  • Various substances can be added to the liquid cast iron through the feed channel 15, for the purpose of improving the quality thereof.
  • inoculants suitable to allow clustering of the graphite contained in the cast iron can be added.
  • the mold 3 Located under the crucible 2 is the mold 3, which is preferably part of a train of molds 3 moved automatically. As it is known, the molds have an inlet channel 3a of the liquid metal.
  • the control unit 6 consequently controls, through the information received by the video camera 21, correct alignment of the casting hole 9 and of the inlet channel 3a of the mold.
  • control unit 6 When the control unit 6 detects incorrect reciprocal positioning of the hole 9 and the channel 3a, said unit 6 activates the means 16 to move the crucible 2.
  • This moving means 16 can in fact vary the position of the crucible 2 and therefore the reciprocal position of the crucible and of the molds 3. Movements of a few centimeters or millimeters along the two axes of movement 17a and 17b, in the horizontal plane, are therefore sufficient to allow perfect reciprocal alignment between the casting hole 9 and the inlet channel 3a.
  • control unit 6 controls movement of the closing device 11 to the open position: the rod 12 is lifted and moved away from the hole 9 which is consequently left open.
  • the liquid cast iron then flows through the casting channel 10 and, through the inlet channel 3a, into the mold 3.
  • the level of cast iron inside the mold 3 is monitored by the control unit 6 through the video camera 21.
  • the closing device 11 is once again returned to the closed position: the rod 12 is lowered and inserted in the hole 9.
  • the mold 3, filled with liquid cast iron, is then replaced with another mold 3, and the mold filling process is repeated.
  • the quantity of liquid cast iron contained in the crucible 2 naturally decreases. This quantity is accurately monitored by the control unit 6 by means of the load cells 22 and, subsequent to a specific partial emptying, the need to fill the crucible 2 again is indicated. Filling takes place once again by means of the casting channel 20.
  • the apparatus 1 therefore makes it possible to perform the casting process in molds without interruptions. Nonetheless, maintenance operations and the like are at times necessary.
  • the electrical cables 7 and the cooling circuit 5a can in fact be disconnected and reconnected rapidly; in fact, both have releasable connections separate from each other.
  • the invention comprises a new process for casting nodular cast iron.
  • the cast iron is subsequently cast into one or more molds 3, through the casting system 8 described.
  • the invention achieves important advantages.
  • the apparatus 1 makes it possible to produce high quality metal elements, made in particular of nodular cast iron, at moderate costs.
  • liquid cast iron in particular nodular cast iron, inside the crucible 2 is kept at optimum and even temperatures and is cast immediately and promptly.
  • a further advantage is represented by the fact that the apparatus 1 allows casting without inclusions of slag present in the bath of liquid cast iron.
  • slag floats on the liquid cast iron and is therefore to be found on the upper surface of the bath. Consequently, the casting hole 9 located on the base allows exclusion of slag from the casting process.
  • Casting is moreover improved by the presence of the video camera 21 and of the control unit 6. In fact, these elements allow accurate casting in the inlet channel 3a of the mold 3.
  • Another advantage is represented by the specific dimensions of the crucible 2. In fact, it allows a metallostatic head adequate for the casting flow and, at the same time, a quantity of charge that allows the liquid cast iron contained in the crucible 2 to retain the spheroidizing effect.
  • apparatus 1 adapts to molds, and in particular to sequences of molds, of different types and dimensions and to production furnaces of any type and dimension.
  • Yet another advantage of the apparatus 1 is its high level of automation. In fact, it has load cells 22 for automatic control of the quantity of liquid cast iron in the crucible 2, and a video camera 21 to control correct filling of the molds 3.
  • Last but not least advantage of the apparatus 1 is realized by the fact that cleaning, maintenance and repair operations on the furnace can be performed rapidly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP06425638A 2006-09-15 2006-09-15 Giessvorrichtung zum Giessen von Metallschmelzen Withdrawn EP1900458A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06425638A EP1900458A1 (de) 2006-09-15 2006-09-15 Giessvorrichtung zum Giessen von Metallschmelzen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06425638A EP1900458A1 (de) 2006-09-15 2006-09-15 Giessvorrichtung zum Giessen von Metallschmelzen

Publications (1)

Publication Number Publication Date
EP1900458A1 true EP1900458A1 (de) 2008-03-19

Family

ID=37808368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06425638A Withdrawn EP1900458A1 (de) 2006-09-15 2006-09-15 Giessvorrichtung zum Giessen von Metallschmelzen

Country Status (1)

Country Link
EP (1) EP1900458A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071407A1 (de) * 2007-12-05 2009-06-11 Siemens Aktiengesellschaft Ofen und reinigungseinrichtung für einen ofen
CN108971427A (zh) * 2018-09-13 2018-12-11 南通华东油压科技有限公司 一种球墨铸铁后盖的浇注方法

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945141A1 (de) * 1968-11-11 1970-06-04 Wiener Schwachstromwerke Gmbh Einrichtung zum horizontalen Stranggiessen
JPS55161555A (en) * 1979-06-05 1980-12-16 Sumitomo Electric Ind Ltd Continuous casting method
EP0035488A1 (de) * 1980-03-05 1981-09-09 VOEST-ALPINE Aktiengesellschaft Verfahren zum Ermitteln der in einem Zwischengefäss befindlichen Schlackenmenge während des Stranggiessens einer Metallschmelze sowie Einrichtung zur Durchführung des Verfahrens
GB2127338A (en) * 1981-09-28 1984-04-11 Sumitomo Metal Ind Scarfing method and apparatus
CH647435A5 (en) * 1980-07-11 1985-01-31 Fischer Ag Georg Continuous-flow vessel for positioning between a casting ladle and casting mould
JPS60154867A (ja) * 1984-01-26 1985-08-14 Toyota Motor Corp 注湯量制御方法およびその装置
DE4103243A1 (de) * 1990-02-21 1991-08-29 Inductotherm Corp Verfahren zur steuerung des giessens einer fluessigkeit aus einem gefaess in einzelne gussformen sowie einrichtung zur durchfuehrung des verfahrens
EP0545607A1 (de) * 1991-11-24 1993-06-09 Ontec Limited Verfahren und Vorrichtung zur Herstellung von homogenen Legierungen
EP0717119A2 (de) * 1994-10-25 1996-06-19 NIPPON MINING & METALS COMPANY, LIMITED Verfahren zur Herstellung von einer aktives metallenthaltenden Kupferlegierung
JPH08164459A (ja) * 1994-12-13 1996-06-25 Nikko Kinzoku Kk 加圧式注湯炉の自動注湯制御方法
EP0747152A1 (de) * 1995-06-07 1996-12-11 Inductotherm Corp. Videosystem zur Positionierung einer Giesspfanne
EP1273370A2 (de) * 1991-03-27 2003-01-08 Kawasaki Steel Corporation Vorrichtung zum Entfernen nichtmetallischer Einschlüsse in flüssigem Metall

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1945141A1 (de) * 1968-11-11 1970-06-04 Wiener Schwachstromwerke Gmbh Einrichtung zum horizontalen Stranggiessen
JPS55161555A (en) * 1979-06-05 1980-12-16 Sumitomo Electric Ind Ltd Continuous casting method
EP0035488A1 (de) * 1980-03-05 1981-09-09 VOEST-ALPINE Aktiengesellschaft Verfahren zum Ermitteln der in einem Zwischengefäss befindlichen Schlackenmenge während des Stranggiessens einer Metallschmelze sowie Einrichtung zur Durchführung des Verfahrens
CH647435A5 (en) * 1980-07-11 1985-01-31 Fischer Ag Georg Continuous-flow vessel for positioning between a casting ladle and casting mould
GB2127338A (en) * 1981-09-28 1984-04-11 Sumitomo Metal Ind Scarfing method and apparatus
JPS60154867A (ja) * 1984-01-26 1985-08-14 Toyota Motor Corp 注湯量制御方法およびその装置
DE4103243A1 (de) * 1990-02-21 1991-08-29 Inductotherm Corp Verfahren zur steuerung des giessens einer fluessigkeit aus einem gefaess in einzelne gussformen sowie einrichtung zur durchfuehrung des verfahrens
EP1273370A2 (de) * 1991-03-27 2003-01-08 Kawasaki Steel Corporation Vorrichtung zum Entfernen nichtmetallischer Einschlüsse in flüssigem Metall
EP0545607A1 (de) * 1991-11-24 1993-06-09 Ontec Limited Verfahren und Vorrichtung zur Herstellung von homogenen Legierungen
EP0717119A2 (de) * 1994-10-25 1996-06-19 NIPPON MINING & METALS COMPANY, LIMITED Verfahren zur Herstellung von einer aktives metallenthaltenden Kupferlegierung
JPH08164459A (ja) * 1994-12-13 1996-06-25 Nikko Kinzoku Kk 加圧式注湯炉の自動注湯制御方法
EP0747152A1 (de) * 1995-06-07 1996-12-11 Inductotherm Corp. Videosystem zur Positionierung einer Giesspfanne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071407A1 (de) * 2007-12-05 2009-06-11 Siemens Aktiengesellschaft Ofen und reinigungseinrichtung für einen ofen
CN108971427A (zh) * 2018-09-13 2018-12-11 南通华东油压科技有限公司 一种球墨铸铁后盖的浇注方法

Similar Documents

Publication Publication Date Title
KR101530106B1 (ko) 반액상 금속 처리 및 감지 장치, 이의 이용 방법
AU2011349038B2 (en) Elimination of shrinkage cavity in cast ingots
KR20160105428A (ko) 큰 단면을 갖는 긴 주괴의 생산을 위한 방법 및 플랜트
EP3097994B1 (de) Permanentmagnetartige rührvorrichtung für metallschmelze und schmelzofen sowie stranggiessvorrichtung damit
EP1900458A1 (de) Giessvorrichtung zum Giessen von Metallschmelzen
US9574826B2 (en) Crucible and dual frequency control method for semi-liquid metal processing
RU2533579C1 (ru) Электрошлаковая печь для получения полого слитка
JP2983881B2 (ja) ロックゲートを備えた精密鋳造設備
US3273212A (en) Method of operating an electric furnace
CN104416162A (zh) 一种合金快速凝固设备及其自动控制方法
KR100653556B1 (ko) 연속주조시 용융물, 특히 강 용융물의 온도제어 및/또는온도유지를 위한 방법 및 장치
JP6261422B2 (ja) 誘導加熱式非鉄金属溶解炉システム
JP5267315B2 (ja) 連続鋳造用タンディッシュ及び連続鋳造方法
NL8204522A (nl) Werkwijze en stelsel voor smeltpeilregeling bij doorlopend gieten.
CN219211599U (zh) 一种用于浇注的熔炉
KR101175642B1 (ko) 몰드 슬래그 필름층 형성 시뮬레이터
CN217617694U (zh) 一种金属铸模预热成型装置
US5341394A (en) Furnace for melting materials with low melting point with improved casting duct
RU2290276C1 (ru) Способ получения волокон из расплава и устройство для его реализации
GB2198977A (en) Melting and die-casting metal
RU2295422C2 (ru) Способ получения волокон из расплава и устройство для его реализации
TW202342769A (zh) 金屬熔煉設備
GB2162102A (en) Improvements in metal pouring devices

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080920