US3437128A - Method and apparatus for continuous casting - Google Patents

Method and apparatus for continuous casting Download PDF

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Publication number
US3437128A
US3437128A US485744A US3437128DA US3437128A US 3437128 A US3437128 A US 3437128A US 485744 A US485744 A US 485744A US 3437128D A US3437128D A US 3437128DA US 3437128 A US3437128 A US 3437128A
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United States
Prior art keywords
mold
expansion grooves
grooves
continuous casting
molds
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Expired - Lifetime
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US485744A
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English (en)
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Werner Poppmeier
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Individual
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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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • Molds for continuous casting are generally made from pure copper of from metals and alloys having a higher strength and lower heat conductivity than copper.
  • the mold consists either of a tubular mold, a plate mold or block mold.
  • a tubular mold consists of a seamless tube.
  • a plate mold is assembled from a plurality of plates.
  • a block mold consists of a cast or forged block. In any case, the manufacture of the molds for continuous casting involves substantial costs so that the durability of the molds is significant for the economy of the continuous casting process.
  • the molds are subject to certain typical changes in operation. These changes necessitate eventually a remachining or scrapping of the molds.
  • the thin-walled tubular molds become mainly unsuitable for further use because the mold wall bulges inwardly into the mold cavity adjacent to the level of the melt surface so that the mold cavity is constricted.
  • Plate molds and block molds become mainly unsuitable for further use due to warping and fire cracks. Longitudinal cracks have also been observed, mainly in molds made from a high-strength material.
  • the present invention is based on the recognition that the inside surface of the mold wall, which surface defines the mold cavity, is subjected to higher temperature fluctuations than the cooled outside surface and that it is preferable for this reason to provide normally open expansion grooves in the inside surfaces of the mold wall, which inside surfaces define the mold cavity. As a result, the dissipation of the stresses is much improved thereby compensating for the differential expansions.
  • the width of the expansion grooves may be as large as 0.8 mm.
  • the expansion grooves are preferably formed with the aid of milling cutters, which may be used for providing expansion grooves as small as 0.2 mm. in width.
  • warpage of the mold Wall, constriction of the mold cavity at the level of the melt surface and formation of longitudinal cracks in the mold wall are preferably overcome by vertical expansion grooves, and that is is sufficient to provide such grooves adjacent to the level of the melt surface.
  • the expansion grooves should begin 1050 mm. below the top edge of the mold and should extend below the level of the melt surface. In thin-walled molds, the depth of the expansion grooves should be about one half of the wall thickness. In thick-walled molds, the depth of the expansion grooves should be at least 4 mm.
  • the expansion grooves are preferably evenly spaced around the periphery of the mold, for instance, with a spacing of about 5 mm. between the grooves. Good results may also be achieved with grooves having a greater spacing. Even grooves spaced about 50 mm. apart have a satisfactory effect in opposing the formation of longitudinal cracks in a mold wall consisting of relatively brittle material. Although the stresses having a peripheral direction predominate, particularly adjacent to the level of the melt surface, substantial stresses which are directed longitudinally of the mold are also present. For this reason the provision of horizontal expansion grooves according to the invention is also proposed. They improve the protection against a premature formation of fire cracks.
  • FIG. 1 is a fragmentary transverse sectional view
  • FIG. 2 is a fragmentary longitudinal sectional view.
  • normally open expansion grooves 1 extend at right angles and have been machined by means of milling cutters in the inside surfaces 3 of mold Wall 2.
  • a continuous casting mold comprising mold walls having inside surfaces defining a mold cavity and a series of expansion grooves formed in said inside surfaces to accommodate temperature gradient stresses therein.
  • a process of continuous casting in a tubular mold which comprises inside surfaces defining a mold cavity and formed with expansion grooves, which process comprises maintaining in said mold cavity a melt surface at a level adjacent to said expansion grooves.
  • a process of continuous casting in a tubular mold which comprises inside surfaces defining a mold cavity and formed with vertical expansion grooves and with substantially horizontal expansion grooves, which process comprises maintaining in said mold cavity a melt surface at a level adjacent to said substantially horizontal expansion grooves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US485744A 1964-09-28 1965-09-08 Method and apparatus for continuous casting Expired - Lifetime US3437128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT823764A AT254415B (de) 1964-09-28 1964-09-28 Stranggießkokille

Publications (1)

Publication Number Publication Date
US3437128A true US3437128A (en) 1969-04-08

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ID=3603697

Family Applications (1)

Application Number Title Priority Date Filing Date
US485744A Expired - Lifetime US3437128A (en) 1964-09-28 1965-09-08 Method and apparatus for continuous casting

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US (1) US3437128A (de)
AT (1) AT254415B (de)
GB (1) GB1124253A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5620045A (en) * 1995-04-24 1997-04-15 Gerding; Charles C. Continuous casting mold formed of plate elements
WO2011018076A1 (de) * 2009-08-14 2011-02-17 Kme Germany Ag & Co. Kg Giessform

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH633206A5 (de) * 1978-11-03 1982-11-30 Alusuisse Kokille mit aufgerauhter oberflaeche zum giessen von metallen.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US288969A (en) * 1883-11-27 Contracting car-wheel chill
US481442A (en) * 1892-08-23 Cornelius a
US528034A (en) * 1894-10-23 Chill for making chilled castings
US532888A (en) * 1895-01-22 Chill
FR985119A (fr) * 1948-05-03 1951-07-16 Moule et procédé de coulée en continu pour la fabrication de lingots en métaux légers et lourds, en particulier d'acier et d'alliages d'acier
US3203055A (en) * 1962-12-24 1965-08-31 Mannesmann Ag Continuous casting mold
US3336973A (en) * 1964-10-20 1967-08-22 Babcock & Wilcox Co Continuous casting mold

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US288969A (en) * 1883-11-27 Contracting car-wheel chill
US481442A (en) * 1892-08-23 Cornelius a
US528034A (en) * 1894-10-23 Chill for making chilled castings
US532888A (en) * 1895-01-22 Chill
FR985119A (fr) * 1948-05-03 1951-07-16 Moule et procédé de coulée en continu pour la fabrication de lingots en métaux légers et lourds, en particulier d'acier et d'alliages d'acier
US3203055A (en) * 1962-12-24 1965-08-31 Mannesmann Ag Continuous casting mold
US3336973A (en) * 1964-10-20 1967-08-22 Babcock & Wilcox Co Continuous casting mold

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5620045A (en) * 1995-04-24 1997-04-15 Gerding; Charles C. Continuous casting mold formed of plate elements
US5730206A (en) * 1995-04-24 1998-03-24 Gerding; Charles C. Continuous strip casting mold formed of plate elements
WO2011018076A1 (de) * 2009-08-14 2011-02-17 Kme Germany Ag & Co. Kg Giessform
CN102470426A (zh) * 2009-08-14 2012-05-23 Kme德国股份及两合公司 铸模
US20120138256A1 (en) * 2009-08-14 2012-06-07 Ludwig Schmitz Casting Mold
US8573284B2 (en) * 2009-08-14 2013-11-05 Kme Germany Ag & Co. Kg Casting mold
CN102470426B (zh) * 2009-08-14 2014-03-19 Kme德国有限及两合公司 铸模

Also Published As

Publication number Publication date
AT254415B (de) 1967-05-26
GB1124253A (en) 1968-08-21

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