US3807484A - Method and apparatus for casting liquid metals - Google Patents

Method and apparatus for casting liquid metals Download PDF

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Publication number
US3807484A
US3807484A US00322944A US32294473A US3807484A US 3807484 A US3807484 A US 3807484A US 00322944 A US00322944 A US 00322944A US 32294473 A US32294473 A US 32294473A US 3807484 A US3807484 A US 3807484A
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United States
Prior art keywords
trough
mould
furnace
casting
electromagnetic
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
US00322944A
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English (en)
Inventor
Starck A Von
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 Elotherm GmbH
Original Assignee
AEG Elotherm 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
Priority claimed from DE19722212924 external-priority patent/DE2212924C/de
Application filed by AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
Application granted granted Critical
Publication of US3807484A publication Critical patent/US3807484A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
    • B22D39/006—Electromagnetic conveyors

Definitions

  • Appl' 322944 Apparatus for casting metal including a furnace, a refractory obliquely ascending trough connected at its [30] Foreign Application Priority Data lower end to the furnace, a travelling field inductor Mar. 17, 1972 Germany 2212924 extending ng the trough length for conveying metal up the trough from the furnace, and a casting mould 52 US. Cl 1154/49, 164/133, 164/147 removably attached to the pp end Of the trough- [51] Int.
  • the mould is provided with a trough shaped entry [58] Field of Search 164/49, 133, 147, 250, hi h merges in the mould ingate and which forms 164/337, 363 an extension of the trough when the mould is attached to the trough.
  • the metal is preferably conveyed up the [56] Refe Cit d trough at a rate equal to or greater than the rate that UNITED STATES PATENTS the ITlOUid W111 accept the metal.
  • the invention relates to apparatus for casting liquid metals, particularly light metals, comprising a melting or holding furnace, an electromagnetic conveying trough forming a spout consisting of a refractory obliquely ascending trough and an electromagnetic travelling field inductor extending along the length of the trough, as well as at least one casting mould.
  • the invention also relates to a method of operating this apparatus.
  • the windings of the travelling field inducto'r are subdivided into a permanently energised component winding near the bottom end of the trough, which propels the liquid metal to a given point along the length of the trough, and a component inductor winding at the upper end of the trough which is energized during the pour for only a predetermined period of time.
  • This arrangement which is described in German Pat. Specification No. 1,286,701 enables a high degree of accuracy to be achieved with regard to the quantity of metal cast in each pour.
  • the pouring rate should vary in a particular way for each 'kind of mould.
  • this is achieved in that during the period of energization of the componenet inductor winding at the upper end of the trough the effective intensity of the travelling field produced by said winding is controllably varied according to a preset program by means of a suitable voltage regulating device.
  • This prior art equipment is particularly useful for the consecutive production of major numbers of castings, bearing in mind that the determination of the appropriate program of voltage control takes some time, which may often be quite substantial, several pours being needed simply for testing. If the number of consecutive castings is not very great or if the casting work as is often the case in jobbing foundries varies considerably with regard to the nature of the castings that are required, then the programming of the intensity of the travelling field will generally be less valuable.
  • the contemplated equipment is also intended to be less expensive and complicated than the above described prior types of equipment.
  • the casting equipment is provided with connecting elements particularly for releasably attaching the casting mould to the upper end of the trough so that the casting mould itself has a trough-shaped entry which merges into the ingate and which forms an extension of the trough when the mould has been attached to the upper end of the trough.
  • connecting elements particularly for releasably attaching the casting mould to the upper end of the trough so that the casting mould itself has a trough-shaped entry which merges into the ingate and which forms an extension of the trough when the mould has been attached to the upper end of the trough.
  • the connecting elements comprise a sealing plate which has an opening forming the sill.
  • the gradient of the bottom of the conveying trough may, in the zone of the final inductor pole at the upper end of the trough, be less than it's gradient elsewhere along the length of the trough.
  • the winding of the travelling field inductor is subdivided into a first component winding which adjoins the furnace vessel at the bottom end of the trough and which remains energized throughout the operation, and a second component winding which is associated with'the remainder of the trough and is energized in the course of the pour.
  • the invention also concerns a method of operating the proposed casting equipment which consists in adjusting the field strength of the travelling field inductor to a level at which the conveying rate of the trough is equal to or exceeds the maximum rate of acceptance of liquid metal by the attached casting mould.
  • Vessel 2 of a conventional holding furnace is mounted on a truck 1.
  • an ascending trough 3 of an electromagnetic conveyor is provided on the top by a cover 4.
  • the top of the furnace vessel 2 is likewise closed by a cover 5 which on its underside carries heating elements 6 for heating a metal charge 7 in furnace vessel 2.
  • Below trough 3 is an inductor 8 for generating a travelling electromagnetic field.
  • the inductor winding comprises a first component winding 9 adjacent the furnace vessel 2 and an adjoining second component winding 10 which extends to the upper end of the trough.
  • the connections 11 for feeding the winding are preferably taken to the outside at the junction between the two components.
  • the bottom 13 of trough 3 levels off into the horizontal.
  • the gradient of this part of the line the trough is less than elsewhere.
  • a sealing plate 14 containing an opening forming a sill 15 which rises above the bottom 13 of the trough 3.
  • Sealing plate 14 permits a releasable connection which is at least substantially tight to be formed with a casting mould 16, which in this example is of the permanent type.
  • pneumatically-operated clamping elements are preferably provided between sealing plate 14 and mould 16. These clamping elements draw the assembly on the truck, comprising the holding furnace and conveyor trough towards mould 16 and connect these two units releasably together.
  • Mould 16 has a trough-shaped entry 17 which forms a continuation of the trough when the end of the trough and the mould have been connected together, and which merges directly into the ingate 18.
  • the described casting equipment is preferably operated as follows:
  • the component winding 9 remains energized throughout the operation.
  • the electromagnetic travelling field produced by this component winding propels the liquid metal from the furnace vessel 2up the trough to the point where the second component winding begins.
  • This causes a stationary layer of metal 19 to form which heats upt the body of the trough 3 without itself cooling since it remains in a state of continuous mass exchange with the charge 7 inside the furnace.
  • the second component winding 10 is also energized and the liquid metal is thereby driven further up the trough to its upper end where it flows over sill into trough-shaped entry 17 of the mould l6 and thence into the ingate 18.
  • the intensity of the travelling field produced by the inductor is adjusted until the maximum rate of flow up the trough exceeds the maximum rate of acceptance of the metal into the mould. Under such conditions a layer ofliquid metal will form in the trough and in the trough-shaped mould entry very soon after pouring begins, this layer having the contour indicated by a chain line 20 in the drawing at a level which substantially depends only upon the performance of the trough.
  • the second component winding 10 is switched off. This allows the liquid metal to flow back from the mould entry 17 into the trough until the conditions shown in the drawing have been restored.
  • the connection between the upper end of the trough and the mould can be undone and a fresh mould which has been prepared for the next pour can take the place of the full mould.
  • the moulds may be mounted on a turntable or travelling conveyor which permits them to be carried into register with the upper end of the trough in succession.
  • sand moulds can be used in which case the seal between the mould and the upper end of the trough would conveniently be proucked by pressing a sealing element attached to the upper end of the trough against or into the relatively soft moulding sand.
  • the further improvement comprising a sill for dividing the liquid metal between the trough and the trough-shaped entry into the mould.
  • connecting means includes a sealing plate having an opening which forms the sill.
  • the winding of the travelling field inductor is subdivided into a first component winding which adjoins the furnace vessel at the bottom end of the trough, and which remains energized throughout the operation, and a second component winding which is associated with the remainder of the trough and which is energized in the course of the pour.
  • Apparatus for casting liquid metals comprising:
  • an electromagnetic trough connected to said furnace and including a refractory obliquely ascending trough up which metal is transported from said furnace, an electromagnetic travelling field inductor extending along the length of said trough and pouring spout formed on the end of said trough remote from said furnace, and
  • Apparatus as in claim 7 further including said mould and wherein said mould has a trough shaped entry which merges into a mould ingate.
  • a method of casting liquid metals comprising:

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Details (AREA)
US00322944A 1972-03-17 1973-01-12 Method and apparatus for casting liquid metals Expired - Lifetime US3807484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722212924 DE2212924C (de) 1972-03-17 Gießvorrichtung zum Vergießen von flüssigem Metall mit einem Schmelz oder Warmhalteofen und einer elektromag netischen Forderrinne sowie Verfahren zum Betrieb dieser Vorrichtung

Publications (1)

Publication Number Publication Date
US3807484A true US3807484A (en) 1974-04-30

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Application Number Title Priority Date Filing Date
US00322944A Expired - Lifetime US3807484A (en) 1972-03-17 1973-01-12 Method and apparatus for casting liquid metals

Country Status (6)

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US (1) US3807484A (xx)
JP (1) JPS518855B2 (xx)
CH (1) CH561091A5 (xx)
FR (1) FR2176780B1 (xx)
GB (1) GB1368921A (xx)
IT (1) IT974107B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240128A2 (en) * 1986-04-04 1987-10-07 Inductotherm Corp. Apparatus and method for providing constant molten metal level in gaspermeable shell mold metal casting
US4745620A (en) * 1986-04-04 1988-05-17 Inductotherm Corporation Apparatus and method for maintaining constant molten metal level in metal casting
US5191929A (en) * 1987-07-09 1993-03-09 Toshiba Kikai Kabushiki Kaisha Molten metal supplying apparatus
US6453978B1 (en) * 1999-05-03 2002-09-24 Heinrich Wagner Sinto Maschinenfabrik Gmbh Method and an apparatus for filling of molds with liquidy metals
US20030075249A1 (en) * 2000-12-01 2003-04-24 Andreas Krause Method for the controlled tempering of a casting trough and a casting trough for carrying out the method
US6659165B1 (en) * 2000-01-07 2003-12-09 Nissin Dental Products, Inc. Metal casting device and metal casting method using the same
CN114696502A (zh) * 2022-05-04 2022-07-01 安徽工程大学 一种自冷却电枢绕组系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264463A (en) * 1977-12-27 1981-04-28 Nissan Chemical Industries Ltd. Process for removing calcium oxalate scale

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515898A (en) * 1967-10-20 1970-06-02 Aeg Elotherm Gmbh Apparatus for pouring measured quantities of liquid metals from an electromagnetic conveyor channel
US3534886A (en) * 1967-09-07 1970-10-20 Aeg Elotherm Gmbh Method and apparatus for metering liquid metals to be conveyed electromagnetically from melting crucibles or heat-retaining vessels
US3696858A (en) * 1968-09-24 1972-10-10 Aeg Elotherm Gmbh Method for casting metered quantities of liquid metals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534886A (en) * 1967-09-07 1970-10-20 Aeg Elotherm Gmbh Method and apparatus for metering liquid metals to be conveyed electromagnetically from melting crucibles or heat-retaining vessels
US3515898A (en) * 1967-10-20 1970-06-02 Aeg Elotherm Gmbh Apparatus for pouring measured quantities of liquid metals from an electromagnetic conveyor channel
US3696858A (en) * 1968-09-24 1972-10-10 Aeg Elotherm Gmbh Method for casting metered quantities of liquid metals

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240128A2 (en) * 1986-04-04 1987-10-07 Inductotherm Corp. Apparatus and method for providing constant molten metal level in gaspermeable shell mold metal casting
EP0240128A3 (en) * 1986-04-04 1988-01-20 Inductotherm Corp. Apparatus and method for providing constant molten metal level in gaspermeable shell mold metal casting
US4745620A (en) * 1986-04-04 1988-05-17 Inductotherm Corporation Apparatus and method for maintaining constant molten metal level in metal casting
US5191929A (en) * 1987-07-09 1993-03-09 Toshiba Kikai Kabushiki Kaisha Molten metal supplying apparatus
US6453978B1 (en) * 1999-05-03 2002-09-24 Heinrich Wagner Sinto Maschinenfabrik Gmbh Method and an apparatus for filling of molds with liquidy metals
US6460605B1 (en) * 1999-05-03 2002-10-08 Heinrich Wagner Sinto Maschinenfabrik Gmbh apparatus for filling of molds with liquidy metals
US6659165B1 (en) * 2000-01-07 2003-12-09 Nissin Dental Products, Inc. Metal casting device and metal casting method using the same
US20030075249A1 (en) * 2000-12-01 2003-04-24 Andreas Krause Method for the controlled tempering of a casting trough and a casting trough for carrying out the method
US6763877B2 (en) * 2000-12-01 2004-07-20 Km Europa Metal Ag Method for the controlled tempering of a casting trough and a casting trough for carrying out the method
CN114696502A (zh) * 2022-05-04 2022-07-01 安徽工程大学 一种自冷却电枢绕组系统
CN114696502B (zh) * 2022-05-04 2023-09-22 安徽工程大学 一种自冷却电枢绕组系统

Also Published As

Publication number Publication date
CH561091A5 (xx) 1975-04-30
DE2212924A1 (xx) 1973-01-25
GB1368921A (en) 1974-10-02
FR2176780A1 (xx) 1973-11-02
IT974107B (it) 1974-06-20
FR2176780B1 (xx) 1976-09-10
JPS518855B2 (xx) 1976-03-22
DE2212924B1 (de) 1973-01-25
JPS495829A (xx) 1974-01-19

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