US3552478A - Method for starting and maintaining the supply of metal to a downward operating continuous casting mold - Google Patents

Method for starting and maintaining the supply of metal to a downward operating continuous casting mold Download PDF

Info

Publication number
US3552478A
US3552478A US758270A US3552478DA US3552478A US 3552478 A US3552478 A US 3552478A US 758270 A US758270 A US 758270A US 3552478D A US3552478D A US 3552478DA US 3552478 A US3552478 A US 3552478A
Authority
US
United States
Prior art keywords
mold
metal
launder
supply
molten metal
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
US758270A
Other languages
English (en)
Inventor
Wilhelm Friedrich Lauener
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.)
Alcan Holdings Switzerland AG
Original Assignee
Prolizenz 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 Prolizenz AG filed Critical Prolizenz AG
Application granted granted Critical
Publication of US3552478A publication Critical patent/US3552478A/en
Assigned to SWISS ALUMINIUM LTD. reassignment SWISS ALUMINIUM LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PROLIZENZ AG, A CORP. OF SWITZERLAND
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2713—Siphons
    • Y10T137/2842—With flow starting, stopping or maintaining means

Definitions

  • Marmorek ABSTRACT A method for starting and maintaining the supply of metal to a downward operating continuous casting mold has the steps of sucking metal from a reservoir up through a riser into a launder above the reservoir, then closing the riser and keeping closed the downcomer to the mold, thereafter letting the pressure rise in the launder and subsequently opening the downcomer; then letting the metal flow and starting the casting, thereafter rarefying the air pressure in the launder, and then opening the riser'again.
  • the present invention relates to a method of starting and maintaining the metal supply to a downward operating continuous casting mold, for instance to a casting machine with caterpillar mold, especially for casting strips of nonferrous metals, chiefly of aluminum and aluminum alloys.
  • the mold cavity is defined by a cooperating pair of endless chains of articulated mold blocks, and means are provided for revolving each of said chains about its own center.
  • the chains are mounted so that over a part of theirown length theyengage with each other and define between them a mold cavity having walls which move continuously as the respective chains are revolved together at the same linear speed.
  • Machines of this kind have been named machines with caterpillar mold.” In one 'of the said machines the mold blocks of one row are not connected but are moved separately in a guide system and maintained in circuit in such a way that they meet again at the pouring end of the mold cavity to form a closed mold with the blocks of the other row.
  • a siphon is used.
  • the molten metal is sucked from a reservoir into a closed launder disposed above and connected to an air suction device, the outlets through which the melt enters the supply duct or ducts to the mold being closed; one allows more melt to rise in the launder than necessary for forming a molten metal head on the dummy bar of the mold.
  • the pressure rise in the launder for instance up' to atmospheric (which is the simplest method), and opens the metal-supply ducts.
  • the metal supply When casting downward in caterpillar molds the metal supply presents especially difficult problems as the ducts for the metal supply must project into the closed part of the mold and must be relatively long because of the special path followed by the mold blocks; it follows that the column of molten metal in the supplying ducts must behigh andtherefore it exerts a high metallostatic pressure. It is therefore difficult to obtain the necessary tightness between the supply ducts and the walls of the mold and to prevent leakage of molten metal at the untight spots.
  • the level of the molten metal in the reservoir is somewhat higher than in the mold; for instance, with a casting speed of 3 meters per minute during operation the level difference may be 30 to 50 mm.
  • the level difference may be 30 to 50 mm.
  • a greater level difference of 200 mm. for instance, the said difference being afterwards diminished to about 30 to 50 mm.
  • FIG. is a schematic fragmentary vertical sectional view and shows schematically the principle of a device for carrying out the method according to the invention in a machine with a caterpillar mold.
  • the siphon comprises a suction pipe .11, a launder 12 and a supply tube 13 (of course, onemay use several supply tubes, with or without slit nozzle).
  • a reservoir 14 for the molten casting metal is provided, and the upper part 15 of a caterpillar mold.
  • Valves 16 and 17 are provided, and a suction socket 18.
  • a rarefied pressure of mm for instance (760 mm. Hg 110 mm. Hg 650 mm. Hg) may be sufficient.
  • the valve 16 After reaching the underpr'essure necessary to prevent melt from running out of the launder 12 through the suction pipe 11 into the reservoir 14, the valve 16 may be opened immediately, for instance one second thereafter.
  • the level 23 of the molten metal head in the caterpillar mold is controlled at the same time. It is therefore not necessary to dispose regulating devices in the molten metal head 22.
  • the metal level 25 inthe reservoir 14, which reservoir may be fed from a melting or a holding furnace, may be controlled for instance by means of a floating valve.
  • the method according to the invention offers the further advantage that it is in a great measure independentof the casting speed.
  • the regulation takes place automatically.
  • the method is especially advantageous with continuous casting in a caterpillar mold.
  • it may also be used suitably with other downward continuous casting methods, for instance with the casting between rolls, the strip casting between spaced parallel portions of a pair of flexible metal belts which are moved along with opposite surfaces of the strip being cast (Hazelett), the casting in rotary strip casting machines as well as with the DC casting, and that not only for casting thin plates, but also for casting thick sections, for instance slabs and billets.
  • Siphonlike tubes used in continuous casting are known; however, in distinguished from the method according to the invention, they necessitate a pressure vessel as molten metal reservoir, which makes the device much more expensive and its operation difiicult; moreover, they do not render possible the automatic control of the level of the molten metal head in the mold during the whole duration of the casting operation.
  • a pressure vessel as molten metal reservoir
  • the use of pressure gas in the known devices increases the gas content of the melt, whereas with the method according to the invention a degassing takes place.
  • a method for starting and maintaining the supply of metal to a downward operating continuous casting mold, provided with a dummy bar, comprising sucking molten metal through a suction pipe from a reservoir into a closed launder disposed above and connected to an air suction device, the outlet means through which the melt enters at least one supply duct to deliver melt to the mold being closed: then interrupting the sucking of melt by closing the suction pipe, thereafter letting the pressure rise in the launder, and then letting molten metal flow through said outlet means and supply duct into the mold; thereafter, as soon as a molten metal head has been formed in the mold, beginning to lower the dummy bar, the metal supply being continued through said supply duct, producing again a rarefied air pressure in the launder, and finally opening again the suction pipe.
  • a method according to claim 1 applied to the casting in caterpillar mold comprising putting the chains of articulated mold blocks into motion simultaneously with the beginning of the lowering ofthe dummy bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US758270A 1967-09-07 1968-09-09 Method for starting and maintaining the supply of metal to a downward operating continuous casting mold Expired - Lifetime US3552478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1250767A CH461716A (de) 1967-09-07 1967-09-07 Verfahren zur Ingangsetzung und Aufrechterhaltung der Metallzuführung zu einer Stranggiesskokille und Vorrichtung zur Ausführung des Verfahrens

Publications (1)

Publication Number Publication Date
US3552478A true US3552478A (en) 1971-01-05

Family

ID=4383649

Family Applications (1)

Application Number Title Priority Date Filing Date
US758270A Expired - Lifetime US3552478A (en) 1967-09-07 1968-09-09 Method for starting and maintaining the supply of metal to a downward operating continuous casting mold

Country Status (13)

Country Link
US (1) US3552478A (enrdf_load_html_response)
AT (1) AT290748B (enrdf_load_html_response)
BE (1) BE718796A (enrdf_load_html_response)
CH (1) CH461716A (enrdf_load_html_response)
DE (1) DE1758934A1 (enrdf_load_html_response)
ES (1) ES357581A1 (enrdf_load_html_response)
FR (1) FR1575239A (enrdf_load_html_response)
GB (1) GB1189033A (enrdf_load_html_response)
IS (1) IS868B6 (enrdf_load_html_response)
NL (1) NL6812571A (enrdf_load_html_response)
NO (1) NO129133B (enrdf_load_html_response)
SE (1) SE343494B (enrdf_load_html_response)
YU (1) YU32090B (enrdf_load_html_response)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718175A (en) * 1969-04-15 1973-02-27 Voest Ag Plant for continuous casting without deep casting stream penetration
US3815623A (en) * 1971-11-04 1974-06-11 Farmer Mold & Machine Works Molten metal delivery system
US4425932A (en) 1981-06-08 1984-01-17 Herman Trent S Siphon ladling apparatus
US4594723A (en) * 1983-03-07 1986-06-10 Asea Ab Method for providing pinch control of a tundish channel-type inductor
US5190674A (en) * 1990-04-04 1993-03-02 Monks James H Method and apparatus for controlling the flow of molten metals
US5421562A (en) * 1994-04-28 1995-06-06 General Motors Corporation Gas-shielded siphonic valve
US5590681A (en) * 1993-07-02 1997-01-07 Frank W. Schaefer, Inc. Valve assembly
US5725043A (en) * 1993-07-02 1998-03-10 Frank W. Schaefer, Inc. Low pressure casting process and apparatus
US5967220A (en) * 1997-03-25 1999-10-19 Larex, A.G. Caster including a gas delivery means to resist backflowing and freezing of molten metal to the tip of a nozzle
US6152159A (en) * 1997-01-14 2000-11-28 Frank W. Schaefer, Inc. Valve assembly and method for use in delivery of molten metal
WO2003059554A3 (de) * 2002-01-21 2004-04-22 Rauch Fertigungstechnik Gmbh I Giessvorrichtung
WO2005000500A1 (en) * 2003-06-30 2005-01-06 Norsk Hydro Asa Method and equipment for continuous or semicontinuous casting of metal
WO2009072893A1 (en) * 2007-12-03 2009-06-11 Norsk Hydro Asa Arrangement related to equipment for continuous or semi-continuous casting of metal
WO2017007329A1 (en) * 2015-07-03 2017-01-12 Norsk Hydro Asa Equipment for continuous or semi-continuous casting of metal with improved metal filling arrangement
NO20181185A1 (en) * 2018-09-11 2020-03-12 Norsk Hydro As Casting Equipment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4915270A (en) * 1988-07-13 1990-04-10 Usx Corporation Low-head feeding system for thin section castings
DE10240512A1 (de) * 2002-09-03 2004-03-11 INDUGA Industrieöfen und Giesserei-Anlagen GmbH & Co. KG Verfahren und Vorrichtung zum kontinuierlichen Gießen von Metallen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE879153C (de) * 1943-01-20 1953-06-11 Siegfried Dr-Ing E H Junghans Einrichtung zum ununterbrochenen Giessen von Metallen mit Entlueftung
US3299481A (en) * 1963-01-25 1967-01-24 Hoerder Huettenunion Ag Continuous casting of metal melts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE879153C (de) * 1943-01-20 1953-06-11 Siegfried Dr-Ing E H Junghans Einrichtung zum ununterbrochenen Giessen von Metallen mit Entlueftung
US3299481A (en) * 1963-01-25 1967-01-24 Hoerder Huettenunion Ag Continuous casting of metal melts

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718175A (en) * 1969-04-15 1973-02-27 Voest Ag Plant for continuous casting without deep casting stream penetration
US3815623A (en) * 1971-11-04 1974-06-11 Farmer Mold & Machine Works Molten metal delivery system
US4425932A (en) 1981-06-08 1984-01-17 Herman Trent S Siphon ladling apparatus
US4594723A (en) * 1983-03-07 1986-06-10 Asea Ab Method for providing pinch control of a tundish channel-type inductor
US5190674A (en) * 1990-04-04 1993-03-02 Monks James H Method and apparatus for controlling the flow of molten metals
US5590681A (en) * 1993-07-02 1997-01-07 Frank W. Schaefer, Inc. Valve assembly
US5725043A (en) * 1993-07-02 1998-03-10 Frank W. Schaefer, Inc. Low pressure casting process and apparatus
US5421562A (en) * 1994-04-28 1995-06-06 General Motors Corporation Gas-shielded siphonic valve
US6152159A (en) * 1997-01-14 2000-11-28 Frank W. Schaefer, Inc. Valve assembly and method for use in delivery of molten metal
US5967220A (en) * 1997-03-25 1999-10-19 Larex, A.G. Caster including a gas delivery means to resist backflowing and freezing of molten metal to the tip of a nozzle
US6213193B1 (en) * 1997-03-25 2001-04-10 Larex Ag Caster including a gas delivery means to resist backflowing and freezing of molten metal to the tip of a nozzle and an associated method
WO2003059554A3 (de) * 2002-01-21 2004-04-22 Rauch Fertigungstechnik Gmbh I Giessvorrichtung
WO2005000500A1 (en) * 2003-06-30 2005-01-06 Norsk Hydro Asa Method and equipment for continuous or semicontinuous casting of metal
AU2004251578B2 (en) * 2003-06-30 2009-07-02 Norsk Hydro Asa Method and equipment for continuous or semicontinuous casting of metal
US7445037B2 (en) 2003-06-30 2008-11-04 Norsk Hydro Asa Method and equipment for continuous or semicontinuous casting of metal
RU2351430C2 (ru) * 2003-06-30 2009-04-10 Норск Хюдро Аса Способ и оборудование для непрерывной или полунепрерывной разливки металла
US20060219378A1 (en) * 2003-06-30 2006-10-05 Heggset Bjarne A Method and equipment for continuous or semicontinuous casting of metal
US8413711B2 (en) 2007-12-03 2013-04-09 Norsk Hydro Asa Arrangement related to equipment for continuous or semi-continuous casting of metal
US20110048667A1 (en) * 2007-12-03 2011-03-03 Norsk Hydro Asa Arrangement related to equipment for continuous or semi-continuous casting of metal
WO2009072893A1 (en) * 2007-12-03 2009-06-11 Norsk Hydro Asa Arrangement related to equipment for continuous or semi-continuous casting of metal
RU2488460C2 (ru) * 2007-12-03 2013-07-27 Норск Хюдро Аса Устройство, относящееся к оборудованию для непрерывного или полунепрерывного литья металла
WO2017007329A1 (en) * 2015-07-03 2017-01-12 Norsk Hydro Asa Equipment for continuous or semi-continuous casting of metal with improved metal filling arrangement
US10500635B2 (en) 2015-07-03 2019-12-10 Norsk Hydro Asa Equipment for continuous or semi-continuous casting of metal with improved metal filling arrangement
RU2710240C2 (ru) * 2015-07-03 2019-12-25 Норск Хюдро Аса Оборудование для непрерывного или полунепрерывного литья металла с использованием усовершенствованных средств для заливки металла
NO20181185A1 (en) * 2018-09-11 2020-03-12 Norsk Hydro As Casting Equipment
WO2020052915A1 (en) 2018-09-11 2020-03-19 Norsk Hydro Asa Casting equipment
US11654478B2 (en) 2018-09-11 2023-05-23 Norsk Hydro Asa Casting equipment

Also Published As

Publication number Publication date
IS868B6 (is) 1974-06-28
AT290748B (de) 1971-06-11
FR1575239A (enrdf_load_html_response) 1969-07-18
ES357581A1 (es) 1970-03-16
SE343494B (enrdf_load_html_response) 1972-03-13
GB1189033A (en) 1970-04-22
DE1758934A1 (de) 1971-04-01
NO129133B (enrdf_load_html_response) 1974-03-04
YU32090B (en) 1974-04-30
BE718796A (enrdf_load_html_response) 1968-12-31
CH461716A (de) 1968-08-31
IS1753A7 (is) 1969-03-08
YU206368A (en) 1973-10-31
NL6812571A (enrdf_load_html_response) 1969-03-11

Similar Documents

Publication Publication Date Title
US3552478A (en) Method for starting and maintaining the supply of metal to a downward operating continuous casting mold
EP0366732B1 (en) Apparatus for and process of direct casting of metal strip
US4064925A (en) Continuous casting method and apparatus
CN1037944C (zh) 双辊式连续浇铸机
US3467168A (en) Continuous casting apparatus and method including mold lubrication,heat transfer,and vibration
US3976118A (en) Method for casting material under pressure
YU42341B (en) Device for supplying cast metal into a machine for centrifugally casting
US3746072A (en) Method of pouring molten metal
US3759313A (en) R casting nonferrous metal strips method of starting a casting machine having caterpillar type molds fo
US4217947A (en) Process for the delivery of molten metal to a caterpillar type mold
JP4499927B2 (ja) ストリップ鋳造装置
GB2159076A (en) Continuous vacuum degassing and casting
US4033404A (en) Oscillatory mold equipped with a hollow mold cavity which is curved in the direction of travel of the strand
US3364977A (en) Method for controlling cooling of ingots in continuous casting apparatus
US3763922A (en) Continuous casting machine with storing trough on tiltable frame
US3903954A (en) Apparatus for pouring molten metal
JPS6057935B2 (ja) 連続鋳造用鋳型
KR970005457A (ko) 턴디쉬 노즐의 제어방법 및 그 장치
JPH0431781B2 (enrdf_load_html_response)
JPS60137562A (ja) 薄板連続鋳造方法
JPS60121051A (ja) 薄鋳片連続鋳造装置
JPS55133851A (en) Continuous casting device
JPS5910448A (ja) 連続鋳造における鋳型への給湯方法
JPS6232682Y2 (enrdf_load_html_response)
JPS55133852A (en) Continuous casting device

Legal Events

Date Code Title Description
AS Assignment

Owner name: SWISS ALUMINIUM LTD., CH-3965 CHIPPIS, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PROLIZENZ AG, A CORP. OF SWITZERLAND;REEL/FRAME:004137/0878

Effective date: 19810921