EP1194254B1 - Method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, and corresponding seal element - Google Patents
Method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, and corresponding seal element Download PDFInfo
- Publication number
- EP1194254B1 EP1194254B1 EP00935181A EP00935181A EP1194254B1 EP 1194254 B1 EP1194254 B1 EP 1194254B1 EP 00935181 A EP00935181 A EP 00935181A EP 00935181 A EP00935181 A EP 00935181A EP 1194254 B1 EP1194254 B1 EP 1194254B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seal element
- ingot mould
- dummy bar
- seal
- ingot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
- B22D11/088—Means for sealing the starter bar head in the moulds
Definitions
- the present invention refers to a method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, to the sealing gasket for implementing the method, and to the use of the said gasket in continuous casting. More in particular, the invention refers to a method in which the shaped gasket is set in the crystallizer off line, in conditions of total safety.
- the liquid metal is poured into an open-bottomed cooled crystallizer, or ingot mould, located above a line for extraction and further cooling.
- the poured metal solidifies to form a shell, generally still containing liquid metal, which is extracted in a continuous way from the bottom of the ingot mould.
- the liquid metal contained in the shell solidifies completely along the casting line, after which the body thus produced is generally straightened and then cut into parts of a pre-set length.
- a body is used, referred to as dummy bar, having a cross section slightly smaller than that of the ingot mould, so as to act as a provisional closure for the latter.
- the dummy bar is on the one side in contact with an underlying extraction assembly and, on the other, is equipped with means of hooking onto the body being formed by solidification of the liquid metal in the ingot mould.
- gaskets are used to be set directly on the head of the dummy bar, such as, for example, in the published Japanese patent application JP 8174160, or interposed plates, as in the European patent application No. 231 520, it is necessary to prevent the gasket from getting damaged by impact or tearing when the dummy bar is coming up to the ingot mould. Consequently, it is necessary to mount the gasket immediately before the ingot mould, and, to do this, the staff is obliged to work in the cooling chamber underneath the ingot mould to fix the gasket by hand on the head of the dummy bar, i.e., in working conditions that are even more uncomfortable and dangerous than those at the mouth of the ingot mould.
- JP-A-5285610 discloses a seal which is mounted on the dummy bar head.
- the present invention has the purpose of overcoming these drawbacks by providing, according to a first aspect of the invention, a simple and safe method having the features of claim 1, for ensuring sealing of the ingot-mould/dummy-bar assembly.
- the method according to the present invention is essentially based on the fact that a pre-formed seal element is used which is mounted inside the ingot mould, before insertion of the dummy bar in the latter, off the casting line used, preferably outside the casting plant.
- This latter solution is to be preferred on account of the major advantages that it offers, both in terms of execution times and on account of the conditions of absolute safety in which it is carried out.
- there may exist situations for example in plants with an ingot mould mounted in stand-by alongside the casting line used, in which it may prove necessary to install the gasket within the casting plant, albeit outside the casting line being used.
- the aforesaid seal element is preferably equipped, along its entire edge, with a peripheral projecting raised part, roughly at right angles to the plane of the element and having a roughly wedge-shaped cross section tapered towards the free end, to be easily adapted to the head of the dummy bar when the latter is set inside the ingot mould, and to be gradually pressed between the dummy bar and the ingot mould in order to guarantee a perfect seal.
- the seal element may consist of a single sheet-like body made of plastic material, or of a plurality of parts consolidated by an associated rigid plate, for example made of metal.
- the seal element which is provided with a central through hole, may be equipped also with a plurality of cuts that start from the central hole, to facilitate passage of the element of consolidation with the cast body.
- seal elements In practice, a plurality of types of seal elements is prepared, one for each cross section of ingot mould.
- the appropriate seal element is chosen and, before insertion of the dummy bar, the element is installed inside the ingot mould, where it remains blocked, since, as has been mentioned previously, it has a cross section of slightly larger dimensions than the internal dimensions of the ingot mould.
- the ingot mould provided with gasket can then be transported in due time to the continuous-casting machine and fixed on the latter.
- the dummy bar provided with the elements for hooking to the cast body, is made to go up towards the ingot mould and is pushed inside the latter.
- the engagement between the dummy bar, the internal walls of the ingot mould and the seal element favours the squeezing of the peripheral edge of the seal element against the ingot mould, in particular if the seal element is provided with a raised part projecting at right angles, thus affording a perfect seal.
- the elements for consolidation of the dummy bar with the cast body may be of any suitable type, for example of the so-called starting hook, or starting cage, or spiral type, may be integral with the dummy bar, or removable from the latter, or may be integral with the rigid plate, which in turn may be connected, in a removable way, with the dummy bar.
- the said consolidation elements or the said plate may be connected to the dummy bar by means of fast-clamping and fast-release elements, for example expansion rings, spring-action hooks, and the like.
- Figure 1 a schematic plan view is shown of a seal element 1, provided with a projecting raised part 2 on its edge (shown hatched), with a central hole 3 and with cuts 4.
- the head of the dummy bar 7 is introduced into the ingot mould 5, as shown in Figure 3, thus squeezing the edge 2 of the seal element 1 between the dummy bar and the internal walls of the ingot mould.
- the consolidation element 6 has forced the cuts 4 of Figure 1 to open so as to be able to pass through the hole 3, project within the ingot mould, and here subsequently hook up to the metal that will be cast into the ingot mould.
- the seal element 1 is advantageously made of semi-rigid and deformable material, such as plastics, thermoplastic resins and other materials having similar characteristics of strength and ductility.
- the seal element 1 can, in this latter case, also be reinforced by a stiffening plate 12, if necessary to achieve a better hold inside the ingot mould.
- the seal body 1 may have the shape of a plane sheet in a relatively rigid deformable material, preferably provided, on its edges, with a continuous raised part 2 having a roughly wedge-shaped section, projecting roughly at right angles from the plane of the said sheet.
- a rigid plate 8 for example made of metal, having, in plan view, a shape similar to the internal cross section of the ingot mould, but of smaller dimensions, this plate being equipped with means 6 for consolidation with the cast body and means (not shown) of hooking to the dummy bar.
- peripheral seal elements 10 which are made of plastic material and which form a continuous projecting part which protrudes beyond the edges of the rigid plate itself, so that the plate-plus-seal-elements ensemble assumes dimensions slightly larger than the internal dimensions of the ingot mould, in a way similar to what has been said regarding the seal element 1 in the form of a sheet, as described above.
- This ensemble is mounted, before insertion of the dummy bar, within the ingot mould, as has already been described for the element 1.
- Figure 5 shows a possible cross sections of the said seal element 10, which is roughly U-shaped, and provided with a continuous raised part 2 having a roughly wedge-shaped cross section.
- Figure 9 shows another variant of the cross section of the seal element, which in this case has the shape of a frame fitting only around the peripheral edge of the dummy bar head and leaving open the central part, to provide space for a hook 13 to couple with a correspondent hook 11 solidarily fixed to the rigid plate 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Sealing Material Composition (AREA)
- Gasket Seals (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
Description
Claims (15)
- Method for the sealing of an ingot-mould/dummy-bar assembly in a continuous-casting plant comprising the following steps:a) providing a pre-formed seal element,b) mounting said seal element inside the ingot mould when this is outside the casting line used,c) inserting the dummy bar in said seal element,d) anchoring said dummy bar to said seal element with clamping means.
- Method according to Claim 1, comprising the step of mounting the seal element in the ingot mould when the latter is outside the casting plant.
- Method according to Claim 1, providing, for the said seal element, in plan view, a shape similar to the internal horizontal section of the ingot mould with which it will be used, and linear dimensions of the sides slightly larger than the dimensions of the corresponding sides of the ingot mould.
- Method according to Claim 3, providing linear dimensions of the sides of the seal element larger than the dimensions of the corresponding sides of the ingot mould by an amount of between 0.1 and 4 %.
- Method according to Claim 1, providing a seal between the dummy bar and the ingot mould by means of a deformation of the edge of the said seal element forced between the internal walls of the ingot mould (5) and the dummy bar (7).
- Method according to Claim 5, providing the said seal element (1) with an edge having a raised part (2) projecting roughly at right angles to the plane of the seal element and integral with it, the said projecting raised part having a cross section roughly triangular and being forced, in use, between the dummy bar and the internal walls of the ingot mould.
- Seal element (1) for ensuring a seal between a dummy bar (7) and an ingot mould (5) in a continuous-casting plant, and having, in plan view, a plane shape correspondent to that of the ingot mould (5) in which it is inserted, provided with an integral portion (2), along its peripheral edge, projecting at substantially right angle to said plane body, said projecting portion (2) having a substantially triangular cross section tapering toward the bulk of the dummy bar (7) wherein the central portion of the seal element (1) consists of a relatively thin plane body provided with a relatively small central hole (3) for the passage of hooking means (6) protruding from said dummy bar (7), able to anchor the latter to the continuously cast body, and in that the seal element (1) has linear dimensions of the sides slightly greater than those of the corresponding inner sides of the ingot mould, so as to be adapted for mounting within the ingot mould (5) when the dummy bar (7) is outside the casting plant and to be kept in position by means of friction with the latter.
- Seal element according to Claim 7, comprising a rigid plate (1) provided with consolidation means (11) with the dummy bar (7).
- Seal element according to Claim 7, comprising a flexible plate (1, 14) provided with consolidation means (11) with the dummy bar (7).
- Seal element according to Claim 8 or 9, comprising a plurality of separate segments mounted along the edge of said plate.
- Seal element according to Claim 8 or 9, wherein said consolidation means (11) are releasably anchored to said dummy bar (7).
- Seal element according to Claim 9, wherein said flexible plate (14) is provided with a reinforcing rigid plate (12).
- Seal element (1) for ensuring a seal between a dummy bar (7) and an ingot mould (5) in a continuous-casting plant, and having, in plan view, a plane shape correspondent to that of the ingot mould (5) in which it is inserted, provided with a peripheral seal portion (2) projecting at substantially right angle to said plane body, said peripheral seal portion (2) having a substantially triangular cross section tapering toward the bulk of the dummy bar (7) wherein the central portion of the seal element (1) consists of a relatively thin plane body provided with a relatively small hole (3) for the passage of hooking means (6) protruding from said dummy bar (7), able to anchor the latter to the continuously cast body, and in that said peripheral portion is mounted along the edge of said plane body and has linear dimensions of the sides slightly greater than those of the corresponding inner sides of the ingot mould, so as to be adapted for mounting within the ingot mould (5) when the dummy bar (7) is outside the casting plant and to be kept in position by means of friction with the latter.
- Seal element according to Claim 13, wherein said peripheral seal portion (2) is made of a plurality of separate segments (10).
- Use in a continuous-casting process of a seal element (1) according to any of claims 7 to 14, which is mounted within the ingot mould (5) before the dummy bar (7) is inserted into it.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1999MI001295A ITMI991295A1 (en) | 1999-06-10 | 1999-06-10 | METHOD FOR SEALING THE LINGOTTERY SET - FALSE BAR IN A CONTINUOUS CASTING SYSTEM AND RELATIVE SEALING ELEMENT |
ITMI991295 | 1999-06-10 | ||
PCT/EP2000/005221 WO2000076693A1 (en) | 1999-06-10 | 2000-06-07 | Method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, and corresponding seal element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1194254A1 EP1194254A1 (en) | 2002-04-10 |
EP1194254B1 true EP1194254B1 (en) | 2003-08-27 |
Family
ID=11383146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00935181A Expired - Lifetime EP1194254B1 (en) | 1999-06-10 | 2000-06-07 | Method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, and corresponding seal element |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1194254B1 (en) |
CN (1) | CN1221346C (en) |
AT (1) | ATE248039T1 (en) |
AU (1) | AU765130B2 (en) |
DE (1) | DE60004848T2 (en) |
ES (1) | ES2204609T3 (en) |
IT (1) | ITMI991295A1 (en) |
WO (1) | WO2000076693A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009073005A1 (en) * | 2007-12-04 | 2009-06-11 | Loma Machine, A Division Of Magnum Integrated Technologies Inc. | Waterbox for use with a continuous casting assembly for vertically casting metal slabs |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2400704T3 (en) * | 2008-05-23 | 2013-04-11 | Concast Ag | Cold bar head sealing system in a shell of a continuous casting installation for casting large format preliminary profiles |
KR20130088841A (en) * | 2010-06-30 | 2013-08-08 | 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 | Initial casting part, dummy bar head, and dummy bar for a continuous casting machine for casting preliminary profiles |
CN102847895B (en) * | 2012-09-17 | 2015-06-17 | 中天钢铁集团有限公司 | Ingot guide device for steelmaking continuous casting technique and ingot guide method thereof |
CN106925734B (en) * | 2015-12-31 | 2019-12-20 | 宁波创润新材料有限公司 | Method for manufacturing dummy bar head |
US10875087B1 (en) * | 2020-02-20 | 2020-12-29 | Wagstaff, Inc. | System, apparatus, and method for mold starter block alignment |
CN113145812B (en) * | 2021-04-01 | 2022-10-25 | 东北大学 | Method for optimizing flow of continuous casting transient molten steel |
DE102021213770A1 (en) | 2021-12-03 | 2023-06-07 | Sms Group Gmbh | Sealing system for a continuous casting plant |
WO2024094846A1 (en) | 2022-11-04 | 2024-05-10 | Sms Group Gmbh | Sealing system for use with a dummy bar head of a continuous casting system and method for producing a metal product by means of continuous casting using the sealing system |
DE102023210885A1 (en) | 2022-11-04 | 2024-05-08 | Sms Group Gmbh | Sealing system for use with a cold strand head of a continuous casting plant and method for producing a metallic product by continuous casting using the sealing system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH659016A5 (en) * | 1982-12-20 | 1986-12-31 | Concast Service Union Ag | METHOD AND DEVICE FOR SEALING A STARTING HEAD IN A CONTINUOUS CASTING COIL. |
JPH05285610A (en) * | 1992-04-14 | 1993-11-02 | Nippon Steel Corp | Mold seal device for starting continuous casting and using method therefor |
JPH06106307A (en) * | 1992-09-29 | 1994-04-19 | Sumitomo Heavy Ind Ltd | Method for sealing dummy bar head in continuous casting |
AT401148B (en) * | 1993-03-30 | 1996-06-25 | Voest Alpine Ind Anlagen | GASKET FOR A START-UP HEAD FOR USE IN A CONTINUOUS CASTING SYSTEM |
-
1999
- 1999-06-10 IT IT1999MI001295A patent/ITMI991295A1/en unknown
-
2000
- 2000-06-07 AT AT00935181T patent/ATE248039T1/en active
- 2000-06-07 DE DE60004848T patent/DE60004848T2/en not_active Expired - Lifetime
- 2000-06-07 AU AU50762/00A patent/AU765130B2/en not_active Ceased
- 2000-06-07 CN CN00808711.3A patent/CN1221346C/en not_active Expired - Fee Related
- 2000-06-07 ES ES00935181T patent/ES2204609T3/en not_active Expired - Lifetime
- 2000-06-07 WO PCT/EP2000/005221 patent/WO2000076693A1/en active IP Right Grant
- 2000-06-07 EP EP00935181A patent/EP1194254B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009073005A1 (en) * | 2007-12-04 | 2009-06-11 | Loma Machine, A Division Of Magnum Integrated Technologies Inc. | Waterbox for use with a continuous casting assembly for vertically casting metal slabs |
Also Published As
Publication number | Publication date |
---|---|
DE60004848D1 (en) | 2003-10-02 |
ES2204609T3 (en) | 2004-05-01 |
ITMI991295A1 (en) | 2000-12-10 |
AU5076200A (en) | 2001-01-02 |
WO2000076693A1 (en) | 2000-12-21 |
AU765130B2 (en) | 2003-09-11 |
DE60004848T2 (en) | 2004-07-08 |
ATE248039T1 (en) | 2003-09-15 |
ITMI991295A0 (en) | 1999-06-10 |
CN1354702A (en) | 2002-06-19 |
EP1194254A1 (en) | 2002-04-10 |
CN1221346C (en) | 2005-10-05 |
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