EP4008451B1 - Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement - Google Patents

Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement Download PDF

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Publication number
EP4008451B1
EP4008451B1 EP20212290.9A EP20212290A EP4008451B1 EP 4008451 B1 EP4008451 B1 EP 4008451B1 EP 20212290 A EP20212290 A EP 20212290A EP 4008451 B1 EP4008451 B1 EP 4008451B1
Authority
EP
European Patent Office
Prior art keywords
running surface
lubricant
distribution section
lubricant channel
ingot mould
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.)
Active
Application number
EP20212290.9A
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German (de)
English (en)
Other versions
EP4008451A1 (fr
Inventor
Christian Karl Fellsner
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.)
Hertwich Engineering GmbH
Original Assignee
Hertwich Engineering GmbH
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 Hertwich Engineering GmbH filed Critical Hertwich Engineering GmbH
Priority to EP20212290.9A priority Critical patent/EP4008451B1/fr
Priority to PCT/EP2021/084052 priority patent/WO2022122563A1/fr
Priority to CA3204366A priority patent/CA3204366A1/fr
Priority to US18/265,594 priority patent/US20240075520A1/en
Publication of EP4008451A1 publication Critical patent/EP4008451A1/fr
Application granted granted Critical
Publication of EP4008451B1 publication Critical patent/EP4008451B1/fr
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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
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • 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
    • B22D11/07—Lubricating the moulds

Definitions

  • the invention relates to a mold for continuous casting with a lubricant channel opening into the running surface, which has a distribution section adjoining the running surface.
  • CH361093 shows a method for lubricating the running surface, in which an external seal defines a distribution section on the circumference of the running surface.
  • the distribution section has several evenly spaced lubricant supply lines and is defined by a supply section adjacent to the running surface and having several channels. These channels are also evenly spaced from one another, offset from the lubricant supply lines and enable the lubricant to be supplied to the running surface.
  • the disadvantage of the current technology is that the lubricant does not apply evenly to the running surface, but is released in a concentrated form via the channels. This uneven distribution not only reduces the transportability mentioned above, but also the surface quality of the cast strand. Based on the current technology, a higher number of lubricant supply lines and nozzles could be provided to allow at least more even lubrication, but this would involve a considerable increase in the amount of control and components that are susceptible to wear.
  • the invention is therefore based on the object of enabling uniform lubrication of the running surface of a mold using components that are as little susceptible to wear as possible.
  • the invention solves the problem in that the flow resistance within the distribution section increases in the direction of the running surface and remains constant in a delivery area of the distribution section adjacent to the running surface parallel to the running surface, the delivery area extending circumferentially at least in sections around the running surface. If lubricant is introduced into the lubricant channel, for example using a fluid line, it is first distributed in the areas of lower flow resistance of the distribution section and fills these areas. Only when the pressure is increased further, for example by further supplying lubricant, does the lubricant flow further in the direction of the running surface and is distributed in the areas of higher flow resistance until the delivery area adjacent to the running surface is reached.
  • the lubricant channel according to the invention requires less than 11, preferably less than 5 and even more preferably only one lubricant supply line in the area of lower flow resistance, since the lubricant is automatically evenly distributed in the areas of lower flow resistance due to the different flow resistances.
  • Different flow resistances can be implemented, for example, by means of different meander structures, surface roughness, channel thicknesses, etc. in certain areas. Due to its simple design, the lubricant channel can be easily arranged on the mold inlet side and enables improved lubrication right from the start of continuous casting.
  • the entire interaction area of the cast strand with the running surface can be evenly lubricated if the delivery area extends circumferentially around the running surface at least in sections. Due to its structure, the lubricant channel according to the invention can easily form a continuous, circumferential delivery area to the running surface, since it is not interrupted by any other components, such as nozzles. In this way, the distribution section can extend circumferentially over 10%, preferably over 15%, even more preferably over 25%, 50% or 75%, in particular over 90% of the running surface cross section and preferably over the entire running surface cross section. As a result, every circumferential point of the running surface is equally accessible to the lubricant via the delivery area. This enables a uniform, continuous lubricating film between the running surface and the cast strand.
  • the flow resistance within the distribution section can increase in the direction of the running surface by reducing the cross-section of the lubricant channel in the region of the distribution section towards the running surface.
  • Lubrication can be implemented in a simple and low-wear manner in terms of manufacturing technology by having the dispensing area with a surface roughness that differs from the rest of the distribution section, with the dispensing area preferably having a higher surface roughness than the rest of the distribution section.
  • the flow resistance can be precisely influenced locally using simple manual measures, since as the surface roughness increases, meandering structures form on the treated parts of the distribution section through which the lubricant must pass. This treatment can be carried out directly on the mold and repeated if necessary, meaning that no further components need to be provided and subsequently replaced if necessary.
  • the dispensing area can extend in the radial direction over up to 100mm, in particular over 5mm.
  • the lubricant throughput can be controlled easily and precisely under simplified manufacturing conditions by placing the dispensing area against the lubricant channel wall opposite it. This makes it easy to increase the flow resistance in the direction of the running surface, and further manufacturing measures, such as increasing the surface roughness, changing the flow cross-section or spacers in front of the dispensing area, can be used to ensure that the lubricant can still reach the dispensing area and from there to the running surface. This means that the possible throughput of lubricant can be precisely adjusted depending on the pressure applied.
  • the channel wall sections have a metal surface. It does not matter whether only the surfaces of the channel wall sections are made of metal or are metallized, or whether the channel walls are made entirely of metal.
  • the discharge area in the longitudinal direction of the mold is delimited by at least two mold components.
  • the mold components can be easily assembled using a screw connection, for example, so that their interaction forms the lubricant channel.
  • the mold components can also be easily separated from one another, which means that the distribution section and the discharge area can be easily inspected and maintained between two work steps.
  • the design enables simplified production of the lubricant channel walls because they are openly accessible before the individual components are assembled. This also means that the lubricant channel can easily be arranged on the mold inlet side, for example by having the nozzle plate form a mold component.
  • the lubricant channel to be arranged in the immediate vicinity of the inlet area of the casting strand, thus ensuring optimized lubrication conditions right from the start of the continuous casting.
  • the channel section facing the running surface with a higher surface roughness is in contact with the channel wall of the distribution section opposite it, the flow resistance decreases with increasing surface roughness, since the lubricant can only pass along the meander structures created by the roughness.
  • only one of the two mold components needs to be machined in order to achieve the flow resistance within the distribution section that increases in the direction of the running surface.
  • the distribution section of one mold component can be machined, while the distribution section of the other mold component remains unmachined.
  • a particularly compact design can be achieved if one of the at least two mold components comprises the running surface.
  • unintentional leakage of lubricant can be reduced and at the same time the lubricant supply can be regulated more precisely by limiting the lubricant channel on the side opposite the distribution section with a seal.
  • the seal prevents lubricant from at least partially leaking out on the side opposite the distribution section, facing away from the running surface, due to the applied pressure and also enables a pressure-tight connection of the interacting mold components.
  • a mold according to the invention for continuous casting comprises a running surface 1 and a lubricant channel 2 opening into the running surface 1, which has a the running surface 1 adjoining distribution section 3.
  • the distribution section 3 comprises a delivery area 4 in which the flow resistance parallel to the running surface 1 is constant.
  • the flow resistance increases in order to induce a uniform distribution of the lubricant in the delivery area 4.
  • This can be implemented, for example, by the delivery area 4 having a smaller cross-section and a different surface roughness than the area 5 of the distribution section 3 upstream of the delivery area 4.
  • the distribution section 3 can extend circumferentially around the entire cross-section of a running surface 1 of a mold.
  • Fig. 3 Particularly favorable manufacturing and maintenance conditions arise, as illustrated in Fig. 3, when the lubricant channel 2 is not designed in one piece, but when two mold components 6, 7 delimit the discharge area 4 in the axial longitudinal direction of the mold.
  • the two mold components 6, 7 lie against one another in the area of the discharge area 4. Due to the rough surface of the discharge area 4 and the resulting fluid connection with high flow resistance to the running surface 1, the pressurized lubricant can reach the running surface 1 from the section 5 upstream of the discharge area 4 despite the mold components 6, 7 lying against one another.
  • the cross-section of the lubricant channel 2 is reduced in the area of the distribution section 3, preferably abruptly in the transition area between the area 5 upstream of the discharge area 4 and the discharge area 4.
  • the second mold component 7 can be built relatively compactly and replaced if necessary.
  • the mold can include a seal 8. This seal 8 delimits the distribution section 3 of the lubricant channel 2 on the side opposite the distribution section 3.
  • a lubricant supply opening 9 can be provided for the lubricant supply, which is fed via a supply line 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (8)

  1. Moule pour coulée continue présentant un canal de lubrifiant (2) ouvert dans la surface d'écoulement (1), comprenant une section de distribution (3) se raccordant à la surface d'écoulement (1), caractérisé en ce que la résistance à l'écoulement à l'intérieur de la section de distribution (3) augmente en direction de la surface d'écoulement (1) et reste constante à l'intérieur d'une région de distribution (4) de la section de distribution se raccordant à la surface d'écoulement (3), parallèlement à la surface d'écoulement (1), et dans lequel la région de distribution (4) s'étend de façon circonférentielle au moins par sections autour de la surface d'écoulement (1).
  2. Moule selon la revendication 1, caractérisé en ce que la section transversale du canal de lubrifiant (2) diminue dans la région de la section de distribution (3) en direction de la surface d'écoulement (1).
  3. Moule selon la revendication 1 ou 2, caractérisé en ce que la région de distribution (4) présente une rugosité de surface différente du reste de la section de distribution (3).
  4. Moule selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la région de distribution (4) prend appui sur la paroi du canal de lubrifiant qui lui est opposée.
  5. Moule selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la région de distribution (4) présente une surface métallique.
  6. Moule selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la région de distribution (4) est délimitée dans la direction longitudinale du moule par au moins deux éléments de moule (6, 7).
  7. Moule selon la revendication 6, caractérisé en ce que l'un desdits au moins deux éléments de moule (6, 7) comprend la surface d'écoulement (1).
  8. Moule selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le canal de lubrifiant (2) est délimité par un joint d'étanchéité (8) sur le côté opposé à la section de distribution (3).
EP20212290.9A 2020-12-07 2020-12-07 Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement Active EP4008451B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20212290.9A EP4008451B1 (fr) 2020-12-07 2020-12-07 Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement
PCT/EP2021/084052 WO2022122563A1 (fr) 2020-12-07 2021-12-02 Moule de coulée continue comprenant un canal de lubrifiant débouchant dans la surface de coulée
CA3204366A CA3204366A1 (fr) 2020-12-07 2021-12-02 Moule de coulee continue comprenant un canal de lubrifiant debouchant dans la surface de coulee
US18/265,594 US20240075520A1 (en) 2020-12-07 2021-12-02 Ingot mould for continuous casting with a lubricant channel opening to the running surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20212290.9A EP4008451B1 (fr) 2020-12-07 2020-12-07 Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement

Publications (2)

Publication Number Publication Date
EP4008451A1 EP4008451A1 (fr) 2022-06-08
EP4008451B1 true EP4008451B1 (fr) 2024-05-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20212290.9A Active EP4008451B1 (fr) 2020-12-07 2020-12-07 Moule pour coulée continue avec canal de lubrifiant ouvert dans la surface de roulement

Country Status (4)

Country Link
US (1) US20240075520A1 (fr)
EP (1) EP4008451B1 (fr)
CA (1) CA3204366A1 (fr)
WO (1) WO2022122563A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104124B (de) * 1957-05-31 1961-04-06 Beteiligungs & Patentverw Gmbh Verfahren zum Zufuehren des Gleitmittels in eine Kokille mit horizontal liegender Achse zum kontinuierlichen Giessen von Metallen
CA1082875A (fr) * 1976-07-29 1980-08-05 Ryota Mitamura Methode et appareil de coulee de premiere fusion en coquille
US4437508A (en) * 1979-10-15 1984-03-20 Olin Corporation Continuous lubrication casting molds
FR2734186B1 (fr) * 1995-05-17 1997-06-13 Unimetall Sa Procede de lubrification des parois d'une lingotiere de coulee continue des metaux et lingotiere pour sa mise en oeuvre
ES2273426T3 (es) * 1997-07-10 2007-05-01 Novelis, Inc. Plataforma de moldeo con un sistema para proporcionar un flujo constante a traves de multiples paredes perimetrales permeables en una lingotera.
US20120186772A1 (en) * 2011-01-25 2012-07-26 Craig Shaber Thermal management system for a continuous casting molten metal mold

Also Published As

Publication number Publication date
US20240075520A1 (en) 2024-03-07
WO2022122563A1 (fr) 2022-06-16
EP4008451A1 (fr) 2022-06-08
CA3204366A1 (fr) 2022-06-16

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