EP0633080A2 - Continuous casting mould for casting thin slabs - Google Patents

Continuous casting mould for casting thin slabs Download PDF

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Publication number
EP0633080A2
EP0633080A2 EP94110511A EP94110511A EP0633080A2 EP 0633080 A2 EP0633080 A2 EP 0633080A2 EP 94110511 A EP94110511 A EP 94110511A EP 94110511 A EP94110511 A EP 94110511A EP 0633080 A2 EP0633080 A2 EP 0633080A2
Authority
EP
European Patent Office
Prior art keywords
strips
continuous casting
side walls
narrow
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94110511A
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German (de)
French (fr)
Other versions
EP0633080B2 (en
EP0633080B1 (en
EP0633080A3 (en
Inventor
Hans Streubel
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0633080A2 publication Critical patent/EP0633080A2/en
Publication of EP0633080A3 publication Critical patent/EP0633080A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a continuous casting mold for casting thin slabs with cooled broad side walls and between these, arranged arranged, cooled narrow side walls, which form an upper molded part and a lower support part.
  • the cooled broad side walls and narrow side walls form the upper molded part and the support part surrounding the thin slab on all sides up to the mold exit.
  • the support part is closed at the bottom by the start-up head.
  • the desired width of the thin slab can be adjusted by adjusting the narrow side walls.
  • the known mold has the disadvantage that cracks form in the edges of the thin slabs, particularly when casting at high casting speeds. This leads to a reduction in quality in the rolled finished product.
  • the object of the invention is to provide a mold of the type specified, the formation of edge cracks in the in a simple manner without impairing the dimensional stability Thin slab is avoided. An adjustment of the narrow side wall and a seal at the lower end of the mold should be possible.
  • This formation of distance between the casting strand side and the side strips of the narrow side walls in a simple manner prevents excessive cooling of the casting strand edges on both sides and thus prevents the formation of cracks. It is possible to seal the mold by the start-up head at the lower end of the mold and to adjust the narrow side walls to change the format and to adjust the taper.
  • each narrow side wall consists of a flat upper section and a lower section with lowered side strips.
  • each narrow side wall consists of an upper section with raised side strips and a flat lower section.
  • the width of the side strips is advantageously a maximum of 15 mm.
  • the length of the outwardly offset side strips in the lower section of the narrow side wall is a maximum of 400 mm.
  • the length of the protruding side strips in the upper section of the narrow side wall is at least 400 mm.
  • a mold for casting thin slabs consists of two broad side walls 1, 2 and two on the side between the broad side walls 1, 2 adjustably arranged narrow side walls 3, 4.
  • the wide side walls 1, 2 are curved at the top and form an enlarged pouring area 5.
  • the wide side walls 1, 2 and the narrow side walls 3, 4 are provided with cooling water channels 6.
  • FIGS. 3, 5 and 7. An inventive design of the working side of the narrow side walls 3 according to FIG. 1, left side, is illustrated in FIGS. 3, 5 and 7. Thereafter, the narrow side walls 3 consist of an upper section 3a with a flat working surface 3a 'and a lower section 3b. In the lower section 3b, a middle strip 3b 'is aligned with the upper working surface 3a'. Two side strips 3b '' are recessed with respect to the central strip 3b '. Their width is advantageously less than 15 mm.
  • FIGS. 4, 6 and 8 An alternative design according to the invention of the working side of the narrow side wall 4 according to FIG. 1, right side, is illustrated in FIGS. 4, 6 and 8.
  • the narrow side walls 4 consist of an upper section 4a and a lower section 4b.
  • the upper section 4a has a central strip 4a 'and two projecting side strips 4a''.
  • the lower section 4b forms an overall flat working surface 4b 'aligned with the central strip 4a' of the upper section.
  • the strand shell 9 shown in FIG. 4 solidifies on the working surfaces 4a ′, 4a ′′ of the upper section 4a of the narrow side wall 4, with the side strips 9a behind.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

In a continuous casting moulding for casting thin slabs, two cooled broad-side walls (1, 2) form, with two cooled narrow-side walls (3, 4) arranged adjustably between them, an upper moulding section and a lower supporting section. To improve product quality, in particular to avoid edge cracks, the narrow-side walls (3, 4) have differing side strips on the inner, working side of the moulding section and the supporting section, the side strips (3b'' and 4b') in the supporting section (3b and 4b respectively) being offset outwards relative to the side strips (3a' and 4a'') of the moulding section (3a and 4a respectively). <IMAGE>

Description

Die Erfindung betrifft eine Stranggießkokille zum Gießen von Dünnbrammen mit gekühlten Breitseitenwänden und zwischen diesen verstellbar angeordneten, gekühlten Schmalseitenwänden, die einen oberen Formteil und einen unteren Stützteil bilden.The invention relates to a continuous casting mold for casting thin slabs with cooled broad side walls and between these, arranged arranged, cooled narrow side walls, which form an upper molded part and a lower support part.

Bei einer derartigen, durch die DE-A1 41 31 829 bekannten Kokille bilden die gekühlten Breitseitenwände und Schmalseitenwände den oberen Formteil und den die Dünnbramme allseitig bis zum Kokillenausgang umschließenden Stützteil. Der Stützteil wird unten zum Anfahren vom Anfahrkopf verschlossen. Durch Verstellung der Schmalseitenwände kann die gewünschte Breite der Dünnbramme eingestellt werden. Die bekannte Kokille hat den Nachteil, daß es insbesondere beim Gießen mit hohen Gießgeschwindigkeiten zur Rißbildung in den Kanten der Dünnbrammen kommt. Dies führt zur Qualitätsminderung im gewalzten Fertigprodukt.In such a mold known from DE-A1 41 31 829, the cooled broad side walls and narrow side walls form the upper molded part and the support part surrounding the thin slab on all sides up to the mold exit. The support part is closed at the bottom by the start-up head. The desired width of the thin slab can be adjusted by adjusting the narrow side walls. The known mold has the disadvantage that cracks form in the edges of the thin slabs, particularly when casting at high casting speeds. This leads to a reduction in quality in the rolled finished product.

Durch die DE-A2 19 06 261 ist es bei der Gattung der Knüppelkokillen bekannt, 300 - 500 mm unter dem Gießspiegel in der Kokillenwandung Eckenspalte vorzusehen und diese Eckenspalte im Abstand durch wärmedämmende Wandplatten abzudecken. Bei dieser aufwendigen Kokille ist eine Endabdichtung durch den Anfahrkopf äußerst schwierig durchführbar. Eine Formatverstellung ist wegen der starren Verbindung der Wände ausgeschlossen. Die Wärmedämmung der Ecken ist beim Gießen von Dünnbrammen mit hoher Gießgeschwindigkeit nachteilig.From DE-A2 19 06 261 it is known in the billet mold category to provide corner gaps 300-500 mm below the casting level in the mold wall and to cover these corner gaps at a distance by heat-insulating wall panels. With this complex mold, end sealing by the start-up head is extremely difficult to carry out. A format adjustment is impossible due to the rigid connection of the walls. The thermal insulation of the corners is disadvantageous when casting thin slabs at a high casting speed.

Aufgabe der Erfindung ist die Schaffung einer Kokille der angegebenen Gattung, wobei ohne Beeinträchtigung der Formstabilität auf einfache Weise die Bildung von Kantenrissen in der Dünnbramme vermieden wird. Dabei soll eine Verstellung der Schmalseitenwand und eine Abdichtung am unteren Kokillenende möglich sein.The object of the invention is to provide a mold of the type specified, the formation of edge cracks in the in a simple manner without impairing the dimensional stability Thin slab is avoided. An adjustment of the narrow side wall and a seal at the lower end of the mold should be possible.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Schmalseitenwände im Formteil und Stützteil an der inneren Arbeitsseite unterschiedliche Seitenstreifen aufweisen und die Seitenstreifen im Stützteil gegenüber den Seitenstreifen des Formteils nach außen versetzt stehen.This object is achieved according to the invention in that the narrow side walls in the molded part and the support part have different side strips on the inner working side and the side strips in the support part are offset to the outside with respect to the side strips of the molded part.

Durch diese Distanzbildung zwischen der Gießstrangseite und den Seitenstreifen der Schmalseitenwände wird auf einfache Weise eine zu starke beidseitige Abkühlung der Gießstrangkanten und damit eine Rißbildung vermieden. Dabei ist eine Abdichtung der Kokille durch den Anfahrkopf am unteren Ende der Kokille und eine Verstellung der Schmalseitenwände zur Formatverstellung sowie zur Einstellung der Konizität möglich.This formation of distance between the casting strand side and the side strips of the narrow side walls in a simple manner prevents excessive cooling of the casting strand edges on both sides and thus prevents the formation of cracks. It is possible to seal the mold by the start-up head at the lower end of the mold and to adjust the narrow side walls to change the format and to adjust the taper.

Nach einem weiteren Merkmal der Erfindung besteht die Arbeitsseite jeder Schmalseitenwand aus einem ebenen oberen Abschnitt und einem unteren Abschnitt mit abgesenkten Seitenstreifen.According to a further feature of the invention, the working side of each narrow side wall consists of a flat upper section and a lower section with lowered side strips.

Alternativ kann es vorteilhaft sein, daß die Arbeitsseite jeder Schmalseitenwand aus einem oberen Abschnitt mit erhöhten Seitenstreifen und einem ebenen unteren Abschnitt besteht.Alternatively, it can be advantageous that the working side of each narrow side wall consists of an upper section with raised side strips and a flat lower section.

Die Breite der Seitenstreifen beträgt vorteilhaft maximal 15 mm.The width of the side strips is advantageously a maximum of 15 mm.

Die Länge der nach außen versetzten Seitenstreifen im unteren Abschnitt der Schmalseitenwand beträgt maximal 400 mm.The length of the outwardly offset side strips in the lower section of the narrow side wall is a maximum of 400 mm.

Bei alternativer Ausbildung beträgt die Länge der vorstehenden Seitenstreifen im oberen Abschnitt der Schmalseitenwand mindestens 400 mm.In an alternative embodiment, the length of the protruding side strips in the upper section of the narrow side wall is at least 400 mm.

In der Zeichnung sind Ausführungsbeispiele mit Merkmalen und Vorteilen der Erfindung dargestellt. Es zeigen

Fig. 1
zwei Teilinnenansichten von Kokillen zum Gießen von Dünnbrammen mit unterschiedlich gestalteten Schmalseitenwänden,
Fig. 2
Teildraufsichten der in Fig. 1 dargestellten Kokillen,
Fig. 3
einen vergrößerten Querschnitt gemäß der Linie III-III in Fig. 1,
Fig. 4
einen vergrößerten Querschnitt gemäß der Linie IV-IV in Fig. 1,
Fig. 5
einen vergrößerten Querschnitt gemäß der Linie V-V in Fig. 1,
Fig. 6
einen vergrößerten Querschnitt gemäß der Linie VI-VI in Fig. 1,
Fig. 7
einen Längsschnitt gemäß der Linie VII-VII in Fig. 1
und
Fig. 8
einen Längsschnitt gemäß der Linie VIII-VIII in Fig. 1.
The drawing shows exemplary embodiments with features and advantages of the invention. Show it
Fig. 1
two partial interior views of molds for casting thin slabs with differently designed narrow side walls,
Fig. 2
Partial top views of the molds shown in FIG. 1,
Fig. 3
2 shows an enlarged cross section along the line III-III in FIG. 1,
Fig. 4
2 shows an enlarged cross section along the line IV-IV in FIG. 1,
Fig. 5
2 shows an enlarged cross section along the line VV in FIG. 1,
Fig. 6
2 shows an enlarged cross section along the line VI-VI in FIG. 1,
Fig. 7
a longitudinal section along the line VII-VII in Fig. 1st
and
Fig. 8
a longitudinal section along the line VIII-VIII in Fig. 1st

Gemäß den Figuren 1 und 2 besteht eine Kokille zum Gießen von Dünnbrammen aus zwei Breitseitenwänden 1, 2 und zwei seitlich zwischen den Breitseitenwänden 1, 2 verstellbar angeordnete Schmalseitenwänden 3, 4. Die Breitseitenwände 1, 2 sind im Ausführungsbeispiel oben gewölbt und bilden einen erweiterten Eingießbereich 5. Die Breitseitenwände 1, 2 und die Schmalseitenwände 3, 4 sind mit Kühlwasserkanälen 6 versehen.According to FIGS. 1 and 2, a mold for casting thin slabs consists of two broad side walls 1, 2 and two on the side between the broad side walls 1, 2 adjustably arranged narrow side walls 3, 4. In the exemplary embodiment, the wide side walls 1, 2 are curved at the top and form an enlarged pouring area 5. The wide side walls 1, 2 and the narrow side walls 3, 4 are provided with cooling water channels 6.

Eine erfindungsgemäße Gestaltung der Arbeitsseite der Schmalseitenwände 3 gemäß Fig. 1, linke Seite, ist in den Figuren 3, 5 und 7 verdeutlicht. Danach bestehen die Schmalseitenwände 3 aus einen oberen Abschnitt 3a mit ebener Arbeitsfläche 3a' und einem unteren Abschnitt 3b. Im unteren Abschnitt 3b fluchtet ein mittlerer Streifen 3b' mit der oberen Arbeitsfläche 3a'. Zwei seitliche Streifen 3b'' sind gegenüber dem mittleren Streifen 3b' vertieft. Ihre Breite ist vorteilhaft geringer als 15 mm.An inventive design of the working side of the narrow side walls 3 according to FIG. 1, left side, is illustrated in FIGS. 3, 5 and 7. Thereafter, the narrow side walls 3 consist of an upper section 3a with a flat working surface 3a 'and a lower section 3b. In the lower section 3b, a middle strip 3b 'is aligned with the upper working surface 3a'. Two side strips 3b '' are recessed with respect to the central strip 3b '. Their width is advantageously less than 15 mm.

Hierdurch wird erreicht, daß im oberen Teil 3a an den gekühlten Wänden 1, 2, 3a' eine rechteckige Strangschale 7 erstarrt, die bei der Abwärtsbewegung kontinuierlich dicker wird und bis zum unteren Abschnitt 3b selbststützende Kanten ausbildet. Auf diese Weise entsteht an den zurückliegenden Seitenstreifen 3b'' je ein Spalt 8, in dessen Bereich die Kühlung vermindert und die Bildung von Kantenrissen in der gegossenen Dünnbramme vermieden werden.It is hereby achieved that in the upper part 3a on the cooled walls 1, 2, 3a 'a rectangular strand shell 7 solidifies, which becomes thicker during the downward movement and forms self-supporting edges up to the lower section 3b. In this way, a gap 8 is formed on each of the rear side strips 3b ″, in the area of which the cooling is reduced and the formation of edge cracks in the cast thin slab is avoided.

Eine alternative erfindungsgemäße Gestaltung der Arbeitsseite der Schmalseitenwand 4 gemäß Fig. 1, rechte Seite, ist in den Figuren 4, 6 und 8 verdeutlicht. Danach bestehen die Schmalseitenwände 4 aus einem oberen Abschnitt 4a und einem unteren Abschnitt 4b. Der obere Abschnitt 4a weist einen mittleren Streifen 4a' und zwei vorstehendende Seitenstreifen 4a'' auf. Der untere Abschnitt 4b bildet eine mit dem mittleren Streifen 4a' des oberen Abschnitts fluchtende, insgesamt ebene Arbeitsfläche 4b'
Hierbei erstarrt an den Arbeitsflächen 4a', 4a'' des oberen Abschnittes 4a der Schmalseitenwand 4 die in Fig. 4 dargestellte Strangschale 9 mit zurückliegenden Seitenstreifen 9a. Diese bilden, aufgrund der bei fortschreitender Erstarrung wirkenden Selbststützung mit der ebenen Arbeitsfläche 4b' des unteren Abschnitts 4b Spalte 10, durch welche die Kühlung vermindert und Kantenrisse in der gegossenen Dünnbramme vermieden werden.An alternative design according to the invention of the working side of the narrow side wall 4 according to FIG. 1, right side, is illustrated in FIGS. 4, 6 and 8. Thereafter, the narrow side walls 4 consist of an upper section 4a and a lower section 4b. The upper section 4a has a central strip 4a 'and two projecting side strips 4a''. The lower section 4b forms an overall flat working surface 4b 'aligned with the central strip 4a' of the upper section.
Here, the strand shell 9 shown in FIG. 4 solidifies on the working surfaces 4a ′, 4a ″ of the upper section 4a of the narrow side wall 4, with the side strips 9a behind. These form, due to the self-support with progressive solidification with the flat working surface 4b 'of the lower section 4b, column 10, by means of which the cooling is reduced and edge cracks in the cast thin slab are avoided.

Claims (6)

Stranggießkokille zum Gießen von Dünnbrammen mit gekühlten Breitseitenwänden und zwischen diesen verstellbar angeordneten, gekühlten Schmalseitenwänden, die einen oberen Formteil und einen unteren Stützteil bilden,
dadurch gekennzeichnet,
daß die Schmalseitenwände (3, 4) im Formteil und Stützteil an der inneren Arbeitsseite unterschiedliche Seitenstreifen aufweisen und die Seitenstreifen (3b'' bzw. 4b') im Stützteil (3b bzw. 4b) gegenüber den Seitenstreifen (3a' bzw. 4a'') des Formteils (3a bzw. 4a) nach außen versetzt stehen.Continuous casting mold for casting thin slabs with cooled broad side walls and between these, arranged, arranged, cooled narrow side walls, which form an upper molded part and a lower supporting part,
characterized,
that the narrow side walls (3, 4) in the molded part and support part on the inner working side have different side strips and the side strips (3b '' or 4b ') in the support part (3b or 4b) opposite the side strips (3a' or 4a '' ) of the molded part (3a or 4a) are offset to the outside. Stranggießkokille nach Anspruch 1,
dadurch gekennzeichnet,
daß die Arbeitsseite jeder Schmalseitenwand (3) aus einem ebenen oberen Abschnitt (3a') und einem unteren Abschnitt (3b) mit abgesenkten Seitenstreifen (3a'') besteht.Continuous casting mold according to claim 1,
characterized,
that the working side of each narrow side wall (3) consists of a flat upper section (3a ') and a lower section (3b) with lowered side strips (3a''). Stranggießkokille nach Anspruch 1,
dadurch gekennzeichnet,
daß die Arbeitsseite jeder Schmalseitenwand (4) aus einem oberen Abschnitt (4a) mit erhöhten Seitenstreifen (4a'') und einem ebenen unteren Abschnitt (4b') besteht.Continuous casting mold according to claim 1,
characterized,
that the working side of each narrow side wall (4) consists of an upper section (4a) with raised side strips (4a '') and a flat lower section (4b '). Stranggießkokille nach Anspruch 1,
dadurch gekennzeichnet,
daß die Breite der Seitenstreifen (3b'', 4a'') maximal 15 mm beträgt.Continuous casting mold according to claim 1,
characterized,
that the width of the side strips (3b '', 4a '') is a maximum of 15 mm. Stranggießkokille nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet,
daß die Länge der nach außen versetzten Seitenstreifen (3b'') im unteren Abschnitt (3b) der Schmalseitenwand (3) maximal 400 mm beträgt.Continuous casting mold according to claims 1 and 2,
characterized,
that the length of the outwardly offset side strips (3b '') in the lower section (3b) of the narrow side wall (3) is a maximum of 400 mm. Stranggießkokille nach den Ansprüchen 1 und 3,
dadurch gekennzeichnet,
daß die Länge der vorstehenden Seitenstreifen (4a'') im oberen Abschnitt (4a) der Schmalseitenwand (4) mindestens 400 mm beträgt.Continuous casting mold according to claims 1 and 3,
characterized,
that the length of the protruding side strips (4a '') in the upper section (4a) of the narrow side wall (4) is at least 400 mm.
EP94110511A 1993-07-09 1994-07-06 Continuous casting mould for casting thin slabs Expired - Lifetime EP0633080B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4322948A DE4322948A1 (en) 1993-07-09 1993-07-09 Continuous casting mold for casting thin slabs
DE4322948 1993-07-09

Publications (4)

Publication Number Publication Date
EP0633080A2 true EP0633080A2 (en) 1995-01-11
EP0633080A3 EP0633080A3 (en) 1995-04-26
EP0633080B1 EP0633080B1 (en) 1996-05-15
EP0633080B2 EP0633080B2 (en) 2002-09-04

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EP94110511A Expired - Lifetime EP0633080B2 (en) 1993-07-09 1994-07-06 Continuous casting mould for casting thin slabs

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US (1) US5503216A (en)
EP (1) EP0633080B2 (en)
JP (1) JP3337321B2 (en)
KR (1) KR960013518A (en)
AT (1) ATE138000T1 (en)
CA (1) CA2127639A1 (en)
DE (2) DE4322948A1 (en)

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KR100362255B1 (en) * 2000-06-09 2002-11-29 이현빈 Apparatus for supplying doggy meal
KR20030073158A (en) * 2002-03-08 2003-09-19 조상균 automatic grains provider for a pet
KR100470454B1 (en) * 2002-05-14 2005-02-05 대한민국 Auto-control feeder to provide feed of pigs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1443574A (en) * 1965-07-16 1966-06-24 Schloemann Ag Cooled ingot mold for continuous casting
FR2001683A1 (en) * 1968-02-09 1969-09-26 Tsnii Chernoj Metallurg LINGOTIER FOR FORMING INGOTS WITH RECTANGULAR SECTION BY CONTINUOUS METAL CASTING
FR1586213A (en) * 1968-09-17 1970-02-13
WO1992005898A1 (en) * 1990-10-02 1992-04-16 Mannesmann Ag Liquid-cooled mould for continuous casting of steel billets in slab form

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520352A (en) * 1967-10-19 1970-07-14 Koppers Co Inc Continuous casting mold having insulated portions
US4023612A (en) * 1975-11-25 1977-05-17 Inland Steel Company Continuous casting mold and process of casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1443574A (en) * 1965-07-16 1966-06-24 Schloemann Ag Cooled ingot mold for continuous casting
FR2001683A1 (en) * 1968-02-09 1969-09-26 Tsnii Chernoj Metallurg LINGOTIER FOR FORMING INGOTS WITH RECTANGULAR SECTION BY CONTINUOUS METAL CASTING
FR1586213A (en) * 1968-09-17 1970-02-13
WO1992005898A1 (en) * 1990-10-02 1992-04-16 Mannesmann Ag Liquid-cooled mould for continuous casting of steel billets in slab form

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Publication number Publication date
EP0633080B2 (en) 2002-09-04
US5503216A (en) 1996-04-02
CA2127639A1 (en) 1995-01-10
DE59400276D1 (en) 1996-06-20
EP0633080B1 (en) 1996-05-15
DE4322948A1 (en) 1995-01-12
JP3337321B2 (en) 2002-10-21
JPH07144257A (en) 1995-06-06
ATE138000T1 (en) 1996-06-15
EP0633080A3 (en) 1995-04-26
KR960013518A (en) 1996-05-22

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