EP0252318B1 - Druckofen zum automatischen Giessen von Gussstücken - Google Patents

Druckofen zum automatischen Giessen von Gussstücken Download PDF

Info

Publication number
EP0252318B1
EP0252318B1 EP19870108317 EP87108317A EP0252318B1 EP 0252318 B1 EP0252318 B1 EP 0252318B1 EP 19870108317 EP19870108317 EP 19870108317 EP 87108317 A EP87108317 A EP 87108317A EP 0252318 B1 EP0252318 B1 EP 0252318B1
Authority
EP
European Patent Office
Prior art keywords
molten metal
type automatic
pressure type
set forth
automatic pouring
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
Application number
EP19870108317
Other languages
English (en)
French (fr)
Other versions
EP0252318A1 (de
Inventor
Michiharu Kawasaki Steel Corp. Ozawa
Kiyoshi Kawasaki Steel Corp. Shibuya
Fumio Kawasaki Steel Corp. Kogiku
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0252318A1 publication Critical patent/EP0252318A1/de
Application granted granted Critical
Publication of EP0252318B1 publication Critical patent/EP0252318B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • 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
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • 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
    • B22D39/06—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal

Definitions

  • the present invention relates to a pressure type automatic pouring furnace for casting of the type as indicated in the pre-characterising portion of claim 1.
  • a pressure type automatic pouring furnace for casting of said type is known from BE-A 887 917 representing the most pertinent state of the art.
  • automatic pouring furnaces have become popular as replacements for manual pouring by means of ladle.
  • the automatic pouring furnaces take various systems for pouring the molten metal within the furnaces to casters.
  • pressure type, inclination type, electromagnetic pump type furnaces are available.
  • the pressure type pouring furnaces are known as advantageous in view of pouring accuracy and consumption of electricity.
  • the pressure type automatic pouring furnace for casting comprises a sealingly enclosed molten metal chamber, a molten metal inlet and outlet extending upwardly from a portion of the molten metal chamber in the vicinity of the bottom of the chamber, and a groove type induction heater section communicated with the lower section of the molten metal chamber for heating the molten metal in the chamber.
  • a given base pressure P is introduced into the molten metal chamber for pre- leveling of the molten metal.
  • additional shot pressure A P is introduced into the molten metal chamber for pouring the molten metal to the caster with a given speed which can be controlled by adjusting the magnitude of the shot pressure.
  • the pressure type automatic pouring furnace of the type set forth above is applicable for continuous casting by supplying molten metal continuously or with a given intervals.
  • the conventional pressure type automatic pouring furnace encounters a disadvantage that it requires the molten metal in the molten metal chamber at a level not lower than a minimum level.
  • the minimum level of the molten metal is determined according to the level of the molten metal outlet opening to the molten metal chamber.
  • 30% to 50% to the maximum molten metal amount is required to be maintained within the molten metal chamber.
  • Maintaining more than minimum amount of molten metal to keep the molten metal level higher than the minimum level requires removal of the molten metal in the chamber when the composition of the metal or alloy to use for casting is to be changed. This significantly lowers the yield in casting operation. Especially, when such automatic pouring furnace is used for a casting line in which relatively large number of mutually different alloys are used for casting.
  • Another object of the invention is to provide a pressure type automatic pouring furnace for casting, which successfully avoid possibility of escaping of the pressurized gas from the molten metal chamber.
  • a further object of the invention is to provide a pressure type automatic pouring furnace which has better pressurization characteristics than that of the conventional furnaces.
  • a pressure type automatic pouring furnace in accordance with the present invention, is formed with a molten metal outlet, provided with the features as laid out in the characterizing portion of claim 1.
  • the molten metal chamber is communicated with a groove type induction heater section at a lower section thereof so that the molten metal in the chamber can be effectively heated.
  • the bottom wall of the molten metal outlet is to be declined for a given angle, e.g. 3 ° toward the heating section with respect to the horizontal plane so as to prevent the molten metal from accumulating within the outlet.
  • a pressure type automatic pouring furnace for casting comprises a furnace body defining a chamber for receiving a molten metal, a molten metal inlet defined through a furnace wall and having a first opening opened substantially at the bottom of the chamber, a molten metal outlet defined through the furnace wall and having a second opening exposed to the chamber and located at an elevation lower than the first opening, and a pressure means for introducing a pressure in the chamber for forcing the molten metal within the chamber to the molten metal outlet.
  • the molten metal inlet and outlet are located radially opposite positions.
  • the furnace body has a floor forming the bottom of the chamber, the floor being formed with a stepped down section opposing to the second opening of the molten metal outlet.
  • the second opening has the uppermost section oriented at an elevation substantially corresponding to the general section of the upper surface of the floor.
  • the floor is slanted from the side where the molten metal inlet is formed to the side where the stepped down section is formed.
  • the pressure type automatic pouring furnace further comprises a groove defined in the floor and communicated with the stepped down section, the groove being communicated with a heating means for heating the molten metal.
  • the groove is slanted towards the heating means.
  • the groove is provided a slant angle greater than or equal to 3° with respect to a horizontal plane.
  • the heating means is a groove type induction heating device comprising an electric heater and means defining molten metal path sorrounding the heater and communicated with the goove.
  • the molten metal path defined in the groove type induction heating device is oriented at an elevation lower than the joining section of the groove.
  • the pressure type pouring furnace further comprises a heating means provided beneath the chamber and communicated with the bottom of the chamber.
  • the heating means is a groove type induction heating device comprising an electric heater and means defining molten metal path sorrounding the heater and communicated with the bottom of the chamber. The molten metal path defined in the groove type induction heating device opens to the bottom of the chamber.
  • the pressure means comprises a pressure inlet defined above the chamber for introducing a pressurized gas into the chamber.
  • the pressure type automatic pouring furnace further comprises an auxiliary pressure means associated with the molten metal inlet for introducing a pressurized gas into the chamber through the molten metal inlet.
  • the preferred embodiment of a pressure type automatic pouring furnace has a furnace body 10 defining therein a molten metal chamber 12 by side wall 14 and floor 16.
  • a molten metal inlet path 18 is defined through the side wall 14.
  • the inlet path 18 opens to the molten metal chamber 12 at the inner end thereof.
  • the inner end opening 20 of the inlet path 18 have the lowermost elevation corresponding to the elevation of the upper surface of the floor 16 of the molten metal chamber 12.
  • the inlet path 18 extends upwardly through the side wall 14 of the furnace with a given inclination angle.
  • a closure 22 is provided for sealingly closing the outer end opening 24 of the inlet path 18 in air-tight fashion.
  • a molten metal outlet path 26 is also defined through the side wall 14 of the furnace 10.
  • the outlet path 26 has an inner end 28 opening to the molten metal chamber 12.
  • the outer end 30 of the outlet path 26 communicates with an outlet nozzle 32 in order to pour the molten metal to a caster or casting molding (not shown) therethrough.
  • the inner end 28 of the outlet path 26 has the lowermost elevation lower than that of the general upper surface of the floor 16.
  • the uppermost section of the inner end 28 of the outlet path 26 is positioned at an elevation substantially corresponding to the elevation of the upper surface of the floor 16.
  • a stepped down section 34 is formed on the floor 16 in communication with the inner end 28 of the outlet path 26.
  • the inlet path 18 and the outlet path 26 are located at opposite sides of the furnace 10.
  • the upper surface of the floor 16 is slanted toward stepped down section 34, as indicated by the arrow a in Fig. 2.
  • the stepped down section 34 extends in circumferential direction with a slant angle in a direction 13.
  • the slant angle in p direction in the preferred embodiment, is greater than 3 ° .
  • a groove type induction heater section 36 is provided with the furnace 10.
  • the heater section 36 has an essentially circular molten metal path 38 sorrounding an induction heating device 40, which circular molten metal path is in communication with the lowermost portion of the stepped down section 34 of the floor 16.
  • the upper end of the molten metal chamber 12 is opened and openably closed by means of a closure lid 42.
  • the closure lid 42 sealingly closes the opened upper end of the molten metal chamber 12 in air-tight fashion.
  • the closure lid 42 is provided with a communication path (not shown) to introduce therethrough a pressurized gas.
  • the closure 22 closing the outer end of the inlet path 18 may also have a path for introducing therethrough a pressurized gas. Providing the pressurized gas inlet for the closure 22 should be advantageous to effectively pressurize the molten metal chamber 12 and whereby force the molten metal in the molten metal chamber to the outlet path.
  • the minimum level of the molten metal required is shown in Fig. 4(A).
  • a comparative example is shown in Fig. 4(B).
  • the required amount of the molten metal is to fill only the stepped down section 34. This is clearly smaller than that in the conventional furnace.
  • the effective volume of the molten metal chamber 12 in the furnaces of Figs. 4(A) and 4(B) are the same, e.g. 5.0t, the minimum amount of the molten metal in the inventive furnace of Fig.
  • the molten metal level has to be higher than or equal to the uppermost section of the inlet and outlet paths 18 and 26. Since the molten metal chamber 12 is pressurized, the volume of the molten metal should include amounts to fill the inlet and outlet path for maintaining the molten metal level higher than or equal to the uppermost section of the inner end openings of the inlet and outlet path. Consequently, for the shown example, minimum volume of the molten metal to be required will be 2.7t. In this case, the overall required amout of the molten metal becomes 7.7t.
  • the required minimum amount of the molten metal to be filled in the molten metal chamber become approximately half of that required in the conventional furnace.
  • the induction heating section 36 since the induction heating section 36 is communicated with the stepped down section 34 at the lowermost elevation, heat distribution of the molten metal in the molten metal chamber can be successfully maintained so as to prevent the molten metal from solidifying at the stepped down section 34 opposing the inner end opening 28 of the outlet path 26. That is, as is well known the groove type induction heating device 40 may not have substantial stirring ability. Therefore, heat transmission from the induction heating device to the molten metal in the molten metal chamber 12 generaaly relies on natual convection. This means that the lower temperature molten metal will accumulate at the lower section in the chamber due to difference of the density. If the portion of the stepped down section 34 opposing the inner end opening 28 of the outlet path 26 is located at the lowermost elevation, the lowest temperature part of the molten metal in the molten metal chamber 12 will be accumulated in that portion of the stepped down section.
  • the stepped down section 34 is slanted toward the portion joining with the induction heating section 36, the lowest temperature molten metal flows to the joining section to be introduced into the induction heating system 36 which is located at further lower elevation that that of the joining section. This allows effective heating of the molten metal in the molten metal chamber 12 and thus prevents the molten metal from solidifying in the outlet path during pouring to the caster.
  • additional advantage may be expected that, since the required molten metal mount for maintaining the minimum level is substantially reduced, an electricity required for the induction heating device 40 for heating the molten metal can be reduced correspondingly.
  • the amount of the molten metal to be removed is substantially reduced in comparison with that of the conventional furnace of Fig. 4(B), even when the composition of the metal to be casted was substantially different. This make easier to cast various compositions of metals to be casted by means of the common pouring furnace.
  • the appended table 2 shows average consumed electricities through 3 months while the molten metal has been maintained within the furnace. As will be seen from the table 2, according to the shown embodiment, the consumed electricity can be saved at 10 Kw in comparison with that in the conventional and comparative example of Fig. 4(B).
  • Figs. 6, 7 and 8 show another embodiment of the pressure type automatic pouring furnace according to the invention.
  • the corresponding sections and components common to the foregoing embodiment of Figs. 1 through 3 will be represented by the same reference numerals and thus neglected the detailed discussion in order to avoid redunduncy of discussion and to avoid confusion.
  • the groove type induction heating section 40 is provided beneath the molten metal chamber 12 in the furnace 10.
  • the circular molten metal path 38 communicates with a communication path 52 formed through the bottom of the molten metal chamber 12 directly.
  • the inner end opening 28 of the outlet path 26 is directed to oppose one end of the molten metal path 38 in the induction heating section. Therefore, the molten metal to be introduced into the outlet path 26 may be the one heated by the induction heating section. This may successfully prevent the molten metal in the outlet path from solidifying.
  • the minimum level of the molten metal in the molten metal is that represented by the phantom line 50. Therefore, the minimum amount of the molten metal to maintain the minimum level 50 may be substantially reduced in comparision with that required in the conventional furnace.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (27)

1. Druckofen (10) zum automatischen Gießen von Gußstücken, umfassend:
einen Ofenkörper, welcher eine Kammer (12) zur Aufnahme einer Metallschmelze definiert;
einen Metallschmelzeneinlaß (18, 24), welcher die Ofenwandung (14) durchsetzt und eine Öffnung (20) aufweist, die im wesentlichen am Boden der Kammer (12) angeordnet ist;
einen Metallschmelzenauslaß (26, 28, 30, 32), welcher die Ofenwandung (14) durchsetzt, und
eine Druckeinrichtung (22, 42) zum Aufbauen eines Druckes in der Kammer (12), so daß die in der Kammer (12) vorhandene Metallschmelze in den Metallschmelzenauslaß (26, 28, 30, 32) gedrückt wird, dadurch gekennzeichnet, daß der Metallschmelzenauslaß (26, 28, 30, 32) eine der Kammer (12) zugewandte Öffnung (28) aufweist, welche auf einem Höhenniveau angeordnet ist, welches sich unterhalb des Höhenniveaus der Öffnung (20) des Metallschmelzeneinlasses befindet.
2. Druckofen zum automatischen Gießen nach Anspruch 1, wobei der Metallschmelzeneinlaß (18, 24) und der Metallschmelzenauslaß (26-30) einander radial gegenüberliegend angeordnet sind.
3. Druckofen zum automatischen Gießen nach Anspruch 2, wobei der Ofenkörper einen den Boden der Kammer bildenden Unterbau (16) aufweist, welcher gegenüber der zweiten Öffnung (28) des Metallschmelzenauslasses (26-50) mit einem abwärts gestuften Abschnitt (34) versehen ist.
4. Druckofen zum automatischen Gießen nach Anspruch 3, wobei die Auslaßöffnung (28) ihren höchsten Querschnitt auf einem Höhenniveau hat, welches im wesentlichen der Hauptebene der oberen Oberfläche des Unterbaus (16) entspricht.
5. Druckofen zum automatischen Gießen nach Anspruch 4, wobei der Unterbau (16) von der Seite des Metallschmelzeneinlasses (18, 24) zu der Seite, in welcher der abwärts gestufte Abschnitt (34) ausgebildet ist, abwärts geneigt verläuft.
6. Druckofen zum automatischen Gießen nach Anspruch 5, wobei in dem Unterbau (16) eine Vertiefung ausgebildet ist, welche mit dem abwärts gestuften Abschnitt (34) in Verbindung steht, wobei diese Vertiefung mit einer Heizeinrichtung (40) zum Erwärmen der Metallschmelze in Verbindung steht.
7. Druckofen zum automatischen Gießen nach Anspruch 6, wobei die Vertiefung in Richtung auf die Heizeinrichtung (40) abwärts geneigt ist.
8. Druckofen zum automatischen Gießen nach Anspruch 7, wobei die Vertiefung einen Neigungswinkel (ß) in bezug auf eine horizontale Ebene aufweist, welcher 3° oder mehr beträgt.
9. Druckofen zum automatischen Gießen nach Anspruch 8, wobei die Heizeinrichtung als Induktionsheizeinrichtung (40) vom Vertiefungstyp ausgebildet ist und eine elektrische Heizung sowie Einrichtungen zum Definieren eines Metallschmelzenpfades (80) aufweist, welcher die Heizung umringt und mit der Vertiefung in Verbindung steht.
10. Druckofen zum automatischen Gießen nach Anspruch 9, wobei der in der Induktionsheizeinrichtung (40) vom Vertiefungstyp definierte Metallschmelzenpfad auf einem Höhenniveau angeordnet ist, welches niedriger ist als das Höhenniveau des Verbindungsabschnittes der Vertiefung.
11. Druckofen zum automatischen Gießen nach Anspruch 2, wobei ferner eine Heizeinrichtung (40) unterhalb der Kammer (12) und in Verbindung mit dem Boden dieser Kammer vorgesehen ist.
12. Druckofen zum automatischen Gießen nach Anspruch 11, wobei die Heizeinrichtung eine Induktionsheizeinrichtung (40) vom Vertiefungstyp ist, welche eine elektrische Heizung sowie einen Metallschmelzenpfad (38) definierende Einrichtungen umfaßt, wobei dieser Strömungspfad die Heizung umringt und mit dem Boden der Kammer (12) in Verbindung steht.
13. Druckofen zum automatischen Gießen nach Anspruch 9, wobei sich der in der Induktionsheizeinrichtung (40) vom Vertiefungstyp definierte Metallschmelzenpfad (38) zu dem Boden der Kammer (12) öffnet.
14. Druckofen zum automatischen Gießen nach Anspruch 1, wobei die Druckeinrichtung (22) einen Druckeinlaß aufweist, welcher oberhalb der Kammer (12) definiert ist, um ein Druckgas in die Kammer einzuführen.
15. Druckofen zum automatischen Gießen nach Anspruch 14, wobei ferner eine Hilfs-Druckeinrichtung vorgesehen ist, welche dem Metallschmelzeneinlaß zugeordnet ist, um ein Druckgas durch den Metallschmelzeneinlaß in die Kammer einzuleiten.
16. Druckofen zum automatischen Gießen nach Anspruch 15, wobei sich der Metallschmelzeneinlaß und der Metallschmelzenauslaß radial einander gegenüberliegen.
17. Druckofen zum automatischen Gießen nach Anspruch 16, wobei der Ofenkörper einen Unterbau (16) aufweist, welcher den Boden der Kammer (12) bildet, wobei dieser Unterbau mit einem abwärts gestuften Abschnitt (34) versehen ist, welcher der Auslaßöffnung (28) des Metallschmelzenauslasses gegenüberliegt.
18. Druckofen zum automatischen Gießen nach Anspruch 17, wobei die Auslaßöffnung (28) ihren obersten Querschnitt in einem Höhenniveau hat, welches im wesentlichen der Hauptebene der oberen Oberfläche des Unterbaus (16) entspricht.
19. Druckofen zum automatischen Gießen nach Anspruch 18, wobei der Unterbau (16) geneigt verläuft von der Seite, an welcher der Metallschmelzeneinlaß ausgebildet ist bis zu der Seite, an welcher der abwärts gestufte Abschnitt (34) ausgebildet ist.
20. Druckofen zum automatischen Gießen nach Anspruch 19, bei welchem ferner eine Vertiefung in dem Unterbau ausgebildet ist, welche mit dem abwärts gestuften Abschnitt (34) verbunden ist, wobei diese Vertiefung mit einer Heizeinrichtung (40) zum Erwärmen der Metallschmelze verbunden ist.
21. Druckofen zum automatischen Gießen nach Anspruch 20, wobei diese Vertiefung in Richtung auf die Heizeinrichtung (40) geneigt verläuft.
22. Druckofen zum automatischen Gießen nach Anspruch 21, wobei die Vertiefung gegenüber einer Horizontalebene einen Neigungswinkel von 3° oder mehr aufweist.
23. Druckofen zum automatischen Gießen nach Anspruch 22, wobei die Heizeinrichtung (40) als Induktionsheizeinrichtung vom Vertiefungstyp ausgebildet ist und eine elektrische Heizung sowie eine Einrichtung zum Ausbilden eines Metallschmelzenpfades (38) aufweist, welcher die Heizung umringt und mit der Vertiefung in Verbindung ist.
24. Druckofen zum automatischen Gießen nach Anspruch 23, wobei der in der Induktionsheizeinrichtung vom Vertiefungstyp definierte Metallschmelzenpfad (38) auf einem Höhenniveau angeordnet ist, welches niedriger ist als das Höhenniveau des anschließenden Abschnittes der Vertiefung.
25. Druckofen zum automatischen Gießen nach Anspruch 16, wobei ferner eine Heizeinrichtung (40) unterhalb der Kammer (12) angeordnet ist, welche mit dem Boden der Kammer (12) in Verbindung ist.
26. Druckofen zum automatischen Gießen nach Anspruch 25, wobei die Heizeinrichtung (40) als Induktionserhitzungseinrichtung vom Vertiefungstyp ausgebildet ist und eine elektrische Heizung sowie Einrichtungen zum Ausbilden des die Heizung umringenden Metallschmelzenpfades (38) aufweist und mit dem Boden der Kammer verbunden ist.
27. Druckofen zum automatischen Gießen nach Anspruch 26, wobei der in der Induktionserhitzungseinrichtung vom Vertiefungstyp definierte Metallschmelzenpfad (38) sich zu dem Boden der Kammer (12) öffnet.
EP19870108317 1986-06-09 1987-06-09 Druckofen zum automatischen Giessen von Gussstücken Expired EP0252318B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP13191886A JPS62289363A (ja) 1986-06-09 1986-06-09 加圧式注湯炉
JP131918/86 1986-06-09

Publications (2)

Publication Number Publication Date
EP0252318A1 EP0252318A1 (de) 1988-01-13
EP0252318B1 true EP0252318B1 (de) 1990-06-06

Family

ID=15069235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870108317 Expired EP0252318B1 (de) 1986-06-09 1987-06-09 Druckofen zum automatischen Giessen von Gussstücken

Country Status (3)

Country Link
EP (1) EP0252318B1 (de)
JP (1) JPS62289363A (de)
DE (1) DE3763016D1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0661610B2 (ja) * 1989-05-30 1994-08-17 富士電機株式会社 加圧式注湯炉
JPH051085U (ja) * 1991-06-21 1993-01-08 株式会社ニフコ 取付保持具
AT404328B (de) * 1995-03-24 1998-10-27 Rauch Fertigungstech Gmbh Verfahren und vorrichtung zum beschicken von giessmaschinen
ES2143341B1 (es) * 1996-05-06 2000-11-01 Fundacion Inasmet Horno de colada para moldeo automatico perfeccionado.
DE69719035T2 (de) * 1997-11-18 2003-12-04 Fundacion Inasmet, San Sebastian Giessofen für die automatisches Abgiessen
US7396504B2 (en) 2000-06-22 2008-07-08 Hoei Shokai Co., Ltd. Method for supplying molten metal, system for supplying molten metal, producing method for producing aluminum, producing method for producing aluminum molding product, producing method of automobile, transporting vehicle, container, and apparatus for supplying molten metal
WO2002051740A1 (fr) 2000-12-27 2002-07-04 Hoei Shokai Co., Ltd Receptacle
JP3613686B1 (ja) * 2003-07-25 2005-01-26 日本坩堝株式会社 溶湯運搬用取鍋及び溶湯出湯方法
DE102023106055A1 (de) * 2023-03-10 2024-09-12 Fritz Winter Eisengiesserei Gmbh & Co. Kg NIEDERDRUCKGIEßGEFÄß UND VERFAHREN ZU SEINER HERSTELLUNG
DE102023106056A1 (de) * 2023-03-10 2024-09-12 Fritz Winter Eisengiesserei Gmbh & Co. Kg NIEDERDRUCKGIEßGEFÄß UND VERFAHREN ZUR STATUSBESTIMMUNG EINES NIEDERDRUCKGIEßGEFÄßES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1488313A (fr) * 1966-04-22 1967-07-13 Ct De Rech S De Pont A Mousson Dispositif perfectionné de commande de poches de coulée de liquides
CH646624A5 (en) * 1980-03-13 1984-12-14 Fischer Ag Georg Process for casting molten metal under the pressure of a protective gas and apparatus for carrying out the process

Also Published As

Publication number Publication date
JPS62289363A (ja) 1987-12-16
JPH0224184B2 (de) 1990-05-28
EP0252318A1 (de) 1988-01-13
DE3763016D1 (de) 1990-07-12

Similar Documents

Publication Publication Date Title
US4967827A (en) Method and apparatus for melting and casting metal
EP1018383B1 (de) Druckgiess-verfahren
EP0252318B1 (de) Druckofen zum automatischen Giessen von Gussstücken
US3991263A (en) Means for tapping
EP0717119B1 (de) Verfahren zur Herstellung von einer aktiven metallenthaltenden Kupferlegierung
MXPA01009780A (es) Recipiente metalurgico con un dispositivo de sangrado y metodo para la extraccion controlada exenta de escoria de metal liquido de este recipiente.
US4421257A (en) Metal pouring nozzle with gas inlet
US5271539A (en) Pressure type automatic pouring furnace for casting
EP0347052B1 (de) Gussform und Verfahren zur Herstellung von Gussstücken aus Gusseisen mit Kugelgraphit oder Vermiculargraphit
McLean The Turbulent Tundish--Contaminator or Refiner?
EP0779846B1 (de) Vorrichtung zur strömungregelung
CA1260049A (en) Tiltable metallurgical furnace vessel
EP0067500A1 (de) Giessverfahren für Eisen mit kompakter Graphitausscheidung durch Impfung in der Form
HU205291B (en) Separator for separating metal-slag mixture
GB2103132A (en) A method and apparatus for low pressure casting of metals
US4436142A (en) Method and apparatus for making ductile iron castings
EP1750075A1 (de) Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung
EP0132280A1 (de) Verfahren zum erhitzen geschmolzenen stahls im trichter einer kontinuierlichen giessvorrichtung
EP0531418B1 (de) Herstellungsverfahren von gusseisen mit vermiculargraphit
EP1417355B1 (de) Verfahren zur behandlung von eisenlegierungen in einem behälter
US4971294A (en) Induction heated sliding gate valve for vacuum melting furnace
EP0179790B1 (de) Giessöfen
GB2159076A (en) Continuous vacuum degassing and casting
US5282608A (en) Induction heated metal pouring apparatus
GB2047139A (en) A mould gating system

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): DE GB

17P Request for examination filed

Effective date: 19880510

17Q First examination report despatched

Effective date: 19880929

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB

REF Corresponds to:

Ref document number: 3763016

Country of ref document: DE

Date of ref document: 19900712

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970602

Year of fee payment: 11

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

Ref country code: DE

Payment date: 19970613

Year of fee payment: 11

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

Ref country code: GB

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

Effective date: 19980609

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980609

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: 19990401