US3627016A - Method for conducting a dummy bar into a mold - Google Patents

Method for conducting a dummy bar into a mold Download PDF

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Publication number
US3627016A
US3627016A US861295A US3627016DA US3627016A US 3627016 A US3627016 A US 3627016A US 861295 A US861295 A US 861295A US 3627016D A US3627016D A US 3627016DA US 3627016 A US3627016 A US 3627016A
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US
United States
Prior art keywords
mold
dummy bar
guide element
bar
dummy
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
Application number
US861295A
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English (en)
Inventor
Max Burkhardt
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 Concast AG
Original Assignee
Concast AG
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 Concast AG filed Critical Concast AG
Application granted granted Critical
Publication of US3627016A publication Critical patent/US3627016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/085—Means for storing or introducing the starter bars in the moulds

Definitions

  • the invention relates to a method of introducing the dummy bar into an open-ended continuous casting mold with the aid of a guide element and to apparatus for performing the method.
  • Continuous casting is performed by pouring the metal into an open-ended mold. Before pouring begins the exit end of the mold must first be closed by the insertion of the upper end of a dummy bar to prevent the metal poured into the mold from a pouring vessel from running out of the mold. Only after the solidified metal and the dummy bar head have formed a connection can the casting be withdrawn from the mold. After leaving the mold the casting passes through a secondary cooling zone which usually begins near the exit end of the mold and in which the casting continues to be cooled while being supported and guided by rollers. The withdrawal force is applied to the casting by driven rollers which press against the dummy bar.
  • the dummy bar is usually introduced from below by reverse rotation of the driven rollers and the dummy bar thus passes upwards between the rollers located in the secondary cooling zone.
  • the method proposed by the present invention for achieving this object consists in lowering a guide element through the mold along a path extending from the mold to the upper end of the roller apron for the casting, in coupling this guide element to the dummy bar and in introducing the dummy bar upwards into the mold while maintaining said coupling connection between the guide element and the dummy bar.
  • the apparatus for performing this method consists of a guide element in the form of a guide rod or bar having a cross section which at least in parts conforms with the cross section of the mold cavity, and which is provided at its lower end with connecting means for coupling said guide element to the upper end of the dummy bar.
  • the drawing shows an open-ended mold l which has a curved mold cavity.
  • Small rollers 2 which participate in the movements of the mold are mounted close to the exit end of the mold. These rollers are not part of the roller apron located in the secondary cooling zone but serve for minimizing any tendency of the casting to assume a rhomboid cross section.
  • Drive means not shown in the drawing such as the driven rollers in a combined withdrawing and straightening unit, are operated to move a dummy bar 3 approximately to the level of the uppermost pair of rollers Al in roller apron 5.
  • a guide element 7 is lowered from above through the mold until its leading end likewise arrives at the upper end of the roller apron 5, said guide element being guided through the mold along a path determined, for instance, by the mold walls or the rollers 2.
  • the guide element 7 is a bar whose cross section throughout its length substantially conforms with the cross section of the mold cavity.
  • the guide bar 7 may consist of wood or plastic.
  • the coupling means for making a connection with the upper end 9 of the dummy bar 3, said coupling means having the form of say a recess 8 permitting said upper end 9 of a dummy bar 3 to be inserted into said recess 8.
  • the coupling connection may simply consist of an opening of suitable dimensions in the guide bar 7 for the reception of the extreme upper end of the dummy bar 3 or of the dummy bar head and may be an ordinary plug and socket connection.
  • the recess b is adapted for the reception of the upper part of a rail section which is inserted into the dummy bar 3.
  • the dummy bar 3 When the dummy bar 3 has thus been connected to the guide bar '7, the dummy bar 3 is raised and plugged into the mold l by withdrawal rollers being driven in reverse, the connection between guide bar 7 and dummy bar 3 being maintained during this operation. Due to the guidance thus given to the leading end 9 of the dummy bar 3, it will enter the mold without damaging the same.
  • the upper end of the guide bar 7 may be provided with hooks or the like, not shown in the drawing, permitting the guide bar to be handled by hoisting means, for instance, for lowering the guide bar through the mold.
  • hoisting means for instance, for lowering the guide bar through the mold.
  • hoisting devices may also assist in pulling the dummy bar 3 upwards into the mold, conventional means being provided for locking the coupling connection between the guide bar 7 and the dummy bar 3.
  • the guide bar 7 is disconnected from the dummy bar and is withdrawn upwards clear of the mold so that other preparatory work prior to casting, such as sealing the dummy bar head, etc., can be clone.
  • the scope of the invention is not limited to the embodiments that have been particularly described. It can also be applied to casting plants of different types of construction, such as casting plants comprising a straight mold with straight or curved roller apron.
  • a method of introducing a dummy bar into an openended continuous casting mold characterized in that, in sucbar which is to be received in the mold and which is below the mold, the guide element is then moved up through the mold until the dummy bar connected thereto is received in the mold, and the guide element is then disconnected from the dummy bar and is lifted out of the mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US861295A 1968-09-30 1969-09-26 Method for conducting a dummy bar into a mold Expired - Lifetime US3627016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1460668A CH475813A (de) 1968-09-30 1968-09-30 Verfahren und Vorrichtung zum Einführen eines Anfahrstanges in eine Durchlaufkokille einer Stranggiessanlage

Publications (1)

Publication Number Publication Date
US3627016A true US3627016A (en) 1971-12-14

Family

ID=4402267

Family Applications (1)

Application Number Title Priority Date Filing Date
US861295A Expired - Lifetime US3627016A (en) 1968-09-30 1969-09-26 Method for conducting a dummy bar into a mold

Country Status (8)

Country Link
US (1) US3627016A (de)
BE (1) BE739516A (de)
CH (1) CH475813A (de)
DE (1) DE1949019B2 (de)
ES (1) ES372289A1 (de)
FI (1) FI47536C (de)
FR (1) FR2019510A1 (de)
GB (1) GB1219068A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921706A (en) * 1973-10-19 1975-11-25 Voest Ag Starter bar for use in continuous casting plants
US20040081519A1 (en) * 2002-10-28 2004-04-29 Gainer Ronald John Milling head for thread whirling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847206A (en) * 1972-06-14 1974-11-12 Kaiser Aluminium Chem Corp Self-centering bottom block assembly
US4291748A (en) * 1980-02-25 1981-09-29 Concast Incorporated Dummy bar for a continuous casting machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921706A (en) * 1973-10-19 1975-11-25 Voest Ag Starter bar for use in continuous casting plants
US20040081519A1 (en) * 2002-10-28 2004-04-29 Gainer Ronald John Milling head for thread whirling

Also Published As

Publication number Publication date
DE1949019A1 (de) 1971-02-11
GB1219068A (en) 1971-01-13
CH475813A (de) 1969-07-31
BE739516A (de) 1970-03-02
FI47536B (de) 1973-10-01
FI47536C (fi) 1974-01-10
DE1949019B2 (de) 1971-03-11
FR2019510A1 (de) 1970-07-03
ES372289A1 (es) 1972-02-16

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