US3837531A - Method for pouring liquid metal using electromagnetic pump - Google Patents

Method for pouring liquid metal using electromagnetic pump Download PDF

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Publication number
US3837531A
US3837531A US00226114A US22611472A US3837531A US 3837531 A US3837531 A US 3837531A US 00226114 A US00226114 A US 00226114A US 22611472 A US22611472 A US 22611472A US 3837531 A US3837531 A US 3837531A
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US
United States
Prior art keywords
metal
orifice
predetermined
rate
receptacle
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
US00226114A
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English (en)
Inventor
H Eickelberg
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.)
Alco Industries Inc
Modern Equipment Co
Modern Equipment Co Inc
Original Assignee
Modern Equipment Co
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 Modern Equipment Co filed Critical Modern Equipment Co
Priority to US00226114A priority Critical patent/US3837531A/en
Priority to CA138,169A priority patent/CA971334A/en
Priority to DE2217010A priority patent/DE2217010C3/de
Priority to JP47100710A priority patent/JPS529414B2/ja
Priority to IT54895/72A priority patent/IT974207B/it
Priority to FR7301685A priority patent/FR2172100B1/fr
Priority to GB733573A priority patent/GB1370756A/en
Priority to CH211673A priority patent/CH557712A/xx
Application granted granted Critical
Publication of US3837531A publication Critical patent/US3837531A/en
Assigned to ALCO INDUSTRIES, INC. reassignment ALCO INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MODERN EQUIPMENT COMPANY, A CORP OF WI
Assigned to AII, INC. reassignment AII, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALCO INDUSTRIES, INC., A CORP OF WI
Assigned to MODERN EQUIPMENT COMPANY, INC. reassignment MODERN EQUIPMENT COMPANY, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: AII, INC.
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
    • 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

  • ABSTRACT Molten metal is poured from a receptacle through a discharge orifice at a substantially constant predetermined discharge rate. Metal is transferred from the receptacle to the orifice at a rate in excess of the predetermined discharge rate to completely cover the orifice with a predetermined head of liquid metal. Metal transferred to the orifice from the receptacle in excess of the predetermined discharge rate is returned to the receptacle so that the predetermined head is maintained substantially constant.
  • PAI ENIEB sirzmsn SHEET 20f 2 mm mm mm mm METHOD FOR POURING LIQUID METAL USING ELECTROMAGNETIC PUMP BACKGROUND OF THE INVENTION This application relates to the art of pouring liquid metal, and more particularly to pouring molten metal from a receptacle through an orifice.
  • the invention is particularly applicable to an apparatus wherein an electromagnetic induction field is used to move the metal and will be described with particular reference thereto. However, it will be appreciated that the invention may be carried out with other transfer means for transferring metal from the receptacle to the orifice.
  • the rate of flow over a weir is proportional to the metal depth over the lip or crest of the weir raised to a power greater than one. Therefore, a small change in the depth of liquid flowing over the weir greatly changes the flow rate.
  • Metal is poured from a receptacle through a discharge orifice at a substantially constant predetermined discharge rate. Metal is transferred from the re-
  • the improved apparatus and method of the present invention may be used with a mechanical pump or with pressure to define the transfer means for transferring the metal from the receptacle to the discharge orifice.
  • apparatus of the type described has an upwardly inclined discharge passage which terminates at a discharge orifice instead of a weir.
  • Flow through an orifice is proportional to the square root of liquid depth over the orifice.
  • small variations in the depth of metal over the orifice vary the flow rate in a more insignificant manner proportional to the square root of the variation in depth.
  • the electromagnetic induction field is operated to move metal from the receptacle up the discharge passage at a sufficient rate for completely covering the discharge orifice with a predetermined head of liquid metal.
  • This predetermined head is maintained substantially constant so that metal flows through the orifice at a substantially constant predetermined rate.
  • the induction field is operated to move metal up the discharge passage at a rate in excess of that required to maintain metal flowing through the orifice at the desired predetermined rate.
  • Metal in the discharge passage then includes a lower level moving upward under influence of the induction field and an upper level moving downward under influence of gravity.
  • the predetermined head over the discharge orifice is then maintained by having excess metal moved up the discharge passsage under influence of the induction field flow back down in an upper level under influence of gravity.
  • the induction field is alternately energized and deenergized at predetermined intervals of time for successively discharging substantially equal predetermined quantities of metal through'the discharge orifice.
  • the discharge orifice is provided with a selectively openable and closable stopper. Selectively opening and closing the stopper at predetermined intervals of time successively discharges substantially equal predetermined quantities of metal through the discharge orifice. The induction field may then be maintained in operation at all times.
  • FIG. 1 is a side, elevational cross-sectional view showing the metal pouring appparatus having the improvement of the present invention incorporated therein;
  • FIG. 2 is a cross-sectional elevational view looking generally in the direction of arrows 2--2 of FIG. 1;
  • FIG. 3 is a view similar to FIG. 1 showing an alternative arrangement
  • FIG. 4 is a view similar to FIGS. 1 and 3 showing another alternative arrangement.
  • a receptacle A in which liquid or molten metal B is contained.
  • Receptacle A may be heated in a known manner for maintaining metal B in a liquid or molten state.
  • a removable cover may be provided for receptacle A if so desired to minimize heat losses from metal B due to radiation.
  • Receptacle A includes an outlet communicating with an upwardly inclined channel or discharge passage 22 having an upwardly inclined bottom wall 24.
  • Discharge passage 22 is closed at its outer end by wall 26.
  • Bottom wall 24 of discharge passage 22 terminates at a vertical discharge orifice having a substantially circular cross-sectional configuration. It will be recognized that a discharge orifice having other crosssectional shapes may also be used, and it will be further recognized that orifice 30 could extend horizontally through end wall 26 adjacent bottom wall 24. 68
  • an electromagnetic inductor C which is shown only schematically, is positioned directly beneath bottom wall 24 of discharge passage 22.
  • the necessary voltage to energize inductor C may be produced by generator D which is connected with inductor C through transformer E.
  • generator D and transformer E are illustrated only schematically for simplicity, it will be recognized that these are threephase devices.
  • receptacle A contains molten metal B having its upper surface at a level some what higher than the bottom portion of outlet 20. However, it will be recognized that receptacle A is capable of holding sufficient molten metal to bring the surface level up to a higher point such as represented by a maximum level line 34.
  • inductor C may take many forms.
  • inductor C may comprise a three-phase winding having a plurality of pole spans or polar divisions represented by shadow lines 36.
  • the lower end of inductor C is connected with transformer E by a line 40.
  • Another line 42 connects transformer E with a pole span of inductor C short of outer end 44 of inductor C. Therefore, the main portion of inductor C between lines 40 and 42 is energized when main switch 46to generator D is closed.
  • the electrical connections illustrated are only schematic for simplicity of illustration and that connections from the source of energy to the three-phase winding would actually be made every 120 electrical degrees of winding spacing.
  • inductor C extending between line 42 and terminal end 44, is connected with transformer E through line 48 which includes normally open switch 50. It will be recognized that line 42 is connected with transformer E at a point which'energizes inductor C at a lower energy level between lines 40 and 42 as compared to full energization of inductor C when switch 50 is closed.
  • the electromagnetic induction field produced by energization of the main portion of inductor C between lines 40 and 42 is sufficient to raise metal from receptacle A only to around point 58 which is above maximum metal level 34 in receptacle A.
  • switch 50 is closed. This energizes entire inductor C from its inner end 60 to its outer end 44 through lines 40 and 48 at a higher energy level than that provided to that portion of inductor C connected with lines 40 and 42. Metal then rapidly moves up bottom wall 24 of discharge passage 22 and covers outlet nozzle 30 with a predetermined head 64 of molten metal.
  • a metal in discharge passage 22 during a pouring operation includes a lower level 66 moving upward of bottom wall 24 under the influence of the induction field and an upper level 68 moving downward on the lower level under influence of gravity. With this arrangement, fluctuations in the strength of the induction field will have little effect on the rate at which metal is discharged through orifice 30.
  • inductor C has been energized for transferring metal from receptacle A to orifice 30 at a rate of 8 /2 pounds per second. This maintains a head 64 of 5 inches, and metal flows through orifice 30 at a rate of 2.2 pounds per second. With passageway 22 inclined upwardly at 18 degrees, metal flows back into receptacle A in an upper layer at a rate of 6.3 pounds per second.
  • circular orifice 30 has a diameter of 3/4 inch.
  • Variations in the rate at which metal is pumped up discharge passage 22 by inductor C will not vary head 64 significantly. For example, energization of inductor C to move metal upward at a slightly greater or lesser rate than in the example given will simply cause metal in upper layer 68 to flow back down under influence of gravity at a greater or lesser rate without significantly changing head 64.
  • small changes in head 64 produce very small variations in the flow rate through orifice 30 because the flow rate is porportional only to the square root of depth 64.
  • Switch 50 may then be opened.
  • a stopper 70 may be provided for selectively opening and closing discharge orifice 30.
  • Stopper 70 may be connected with a reciprocating rod 72.
  • Rod 72 has a pin 76 extending through a slot 78 in rod 80 which is pivoted at 82.
  • a solenoid 84 has a rod 86 connected with another slot 88 in rod 80 by pin 90.
  • Solenoid 84 may be connected with a timer 92.
  • a spring 94 may be provided for normally biasing rod 80 in a counterclockwise direction about pin 82 for normally placing stopper 70 in orifice 30 to stop flow of metal therethrough.
  • solenoid 84 at predetermined intervals of time by timer 92 may move solenoid rod 86 downward to pivot rod 80 clockwise about pin 82 for raising stoppers 70 out of orifice 30 to permit flow of metal therethrough.
  • entire inductor C from outer end 44 to inner end 60 may be constantly energized at its high energization level for providing excess metal flow to maintain predetermined head 64 over orifice 30.
  • Selective opening and closing of stopper 70 by timer 92 at predetermined intervals of time will permit successive accurate pours of predetermined volumes of metal.
  • discharge passage 22 is somewhat channel-shaped and bottom wall 24 has a substantial width. Slight variations in the rate at which metal is moved up passage 22 by inductor C will then produce very insignificant changes in head 64 because the substantial width of upper level 68 will allow slightly greater or lesser flow with minor fluctuations in head 64.
  • An outlet conduit 102 has an inlet 104 communicating with receptacle A and an outlet 106 discharging through end wall 26 against baffle 107 above orifice 30 and above normal head 64 which is being maintained.
  • a carbide pump P in conduit 102 is driven by an electric motor for transferring metal from receptacle A to discharge orifice 30 at a rate in excess of that required to maintain the predetermined discharge rate.
  • the terminal end portion of discharge passage 22 may be provided with a downwardly extending boxlike portion 112 having a discharge orifice 114.
  • a return passageway or conduit 116 may then be connected with box-like member 112 at any desirable level 118 above orifice 114.
  • Return passageway or conduit 116 may then be connected through a sidewall of passageway 22 or directly with receptacle A.
  • Metal transferred to box member 112 either by induction, mechanical pumping or gas pressure then simply returns to receptacle A through return passageway 116 while desirable head 118 is maintained substantially constant.
  • the connection between box member 112 and return passageway 118 may also include an adjustable gate for regulating return flow to adjust predetermined head 118. This arrangement may also be used with the stopper previously described.
  • conduit 102 instead of a mechanical pump P for conduit102 of FIG. 3 it will be recognized that it is also possible to surround conduit 102 with an induction coil so that electromagnetic force is still used for supplying metal to discharge orifice 30. It will be recognized that it is also possible to use gas pressure for forcing metal from receptacle A to discharge orifice 30 if excess metal is returned to a separate non-pressurized vessel. Arrangements including more than one receptacle, with one being provided for pouring and the other for return metal are also possible. Arrangements wherein discharge orifice 30 is completely separate from receptacle A are also possible.
  • a method of pouring liquid metal from a receptacle through a discharge orifice comprising the steps of; transferring metal from said receptacle to said orifice to completely cover said orifice with a substantially predetermined head of liquid metal so that liquid metal flows through said orifice at a substantially constant predetermined rate proportional to said head, continuing to transfer metal from said receptacle to said orifice at a rate in excess of that required to maintain metal flowing through said orifice at said predetermined rate, and returning excess metal to said receptacle at a rate substantially equal to the transfer rate less the predetermined discharge rate, said predetermined head being maintained by returning to the receptacle metal transferred to the orifice in excess of the predetermined discharge rate.
  • said orifice includes selectively openable and closable stopper means for selectively opening and closing said orifice to flow of metal therethrough, and further including the step of opening and closing said stopper means at predetermined intervals of time for successively discharging substantially equal predetermined quantities of metal through said orifice.
  • a method of pouring liquid metal from a receptacle having an upwardly inclined discharge passage terminating at a discharge orifice comprising the steps of:
  • said discharge orifice includes selectively openable and closable stopper means for selectively opening and closing said orifice to flow of metal therethrough, and further including the step of opening and closing said stopper means at predetermined intervals of time for successively discharging substantially equal predetermined quantities of metal through said discharge orifice.

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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)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US00226114A 1972-02-14 1972-02-14 Method for pouring liquid metal using electromagnetic pump Expired - Lifetime US3837531A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00226114A US3837531A (en) 1972-02-14 1972-02-14 Method for pouring liquid metal using electromagnetic pump
CA138,169A CA971334A (en) 1972-02-14 1972-03-27 Apparatus and method for pouring liquid metal
DE2217010A DE2217010C3 (de) 1972-02-14 1972-04-08 Vorrichtung zum dosierten Vergießen von flüssigem Metall
JP47100710A JPS529414B2 (ja) 1972-02-14 1972-10-09
IT54895/72A IT974207B (it) 1972-02-14 1972-12-20 Perfezionamento nelle disposizioni di colata di metalli fusi con campo elettromagnetico di propulsio ne
FR7301685A FR2172100B1 (ja) 1972-02-14 1973-01-18
GB733573A GB1370756A (en) 1972-02-14 1973-02-14 Apparatus for pouring liquid metal
CH211673A CH557712A (de) 1972-02-14 1973-02-14 Vorrichtung zum giessen fluessiger metalle.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00226114A US3837531A (en) 1972-02-14 1972-02-14 Method for pouring liquid metal using electromagnetic pump

Publications (1)

Publication Number Publication Date
US3837531A true US3837531A (en) 1974-09-24

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ID=22847607

Family Applications (1)

Application Number Title Priority Date Filing Date
US00226114A Expired - Lifetime US3837531A (en) 1972-02-14 1972-02-14 Method for pouring liquid metal using electromagnetic pump

Country Status (8)

Country Link
US (1) US3837531A (ja)
JP (1) JPS529414B2 (ja)
CA (1) CA971334A (ja)
CH (1) CH557712A (ja)
DE (1) DE2217010C3 (ja)
FR (1) FR2172100B1 (ja)
GB (1) GB1370756A (ja)
IT (1) IT974207B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398589A (en) * 1981-09-25 1983-08-16 General Electric Company Pumping and metering device for fluid metals using electromagnetic pump
US6896032B1 (en) 2002-09-26 2005-05-24 Hayes Lemmerz International, Inc. Stopper-poured molten metal casting vessel with constant head height
CN102744257A (zh) * 2012-07-12 2012-10-24 湖南金龙国际铜业有限公司 紫杂铜连铸连轧制杆采用的装置及工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR969953A (fr) * 1948-07-29 1950-12-28 Four de fusion avec chenal de surchauffe amovible pour moulage direct
US3554670A (en) * 1968-04-19 1971-01-12 Aeg Elotherm Gmbh Electromagnetic conveying trough for the transport of liquid metals
DE2061168A1 (de) * 1969-12-13 1971-06-24 Yaskawa Denki Seisakusho Kk Verfahren zum Steuern einer elektromagnetisch betaetigten Metallgiessvorrichtung
US3610600A (en) * 1968-02-15 1971-10-05 Aeg Elotherm Gmbh Continuously operable plant for degassing and pouring metal melts
US3612720A (en) * 1968-10-01 1971-10-12 Aeg Elotherm Gmbh Method of apportioning liquid metal in an electromagnetic conveyor trough
US3713639A (en) * 1970-08-21 1973-01-30 Aeg Elotherm Gmbh Melting or holding vessel for liquid metals with an adjoining electromagnetic conveying trough

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH536154A (de) * 1971-01-16 1973-04-30 Aeg Elotherm Gmbh Elektromagnetische Förderrinne zum Fördern von flüssigem Metall

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR969953A (fr) * 1948-07-29 1950-12-28 Four de fusion avec chenal de surchauffe amovible pour moulage direct
US3610600A (en) * 1968-02-15 1971-10-05 Aeg Elotherm Gmbh Continuously operable plant for degassing and pouring metal melts
US3554670A (en) * 1968-04-19 1971-01-12 Aeg Elotherm Gmbh Electromagnetic conveying trough for the transport of liquid metals
US3612720A (en) * 1968-10-01 1971-10-12 Aeg Elotherm Gmbh Method of apportioning liquid metal in an electromagnetic conveyor trough
DE2061168A1 (de) * 1969-12-13 1971-06-24 Yaskawa Denki Seisakusho Kk Verfahren zum Steuern einer elektromagnetisch betaetigten Metallgiessvorrichtung
US3713639A (en) * 1970-08-21 1973-01-30 Aeg Elotherm Gmbh Melting or holding vessel for liquid metals with an adjoining electromagnetic conveying trough

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398589A (en) * 1981-09-25 1983-08-16 General Electric Company Pumping and metering device for fluid metals using electromagnetic pump
US6896032B1 (en) 2002-09-26 2005-05-24 Hayes Lemmerz International, Inc. Stopper-poured molten metal casting vessel with constant head height
CN102744257A (zh) * 2012-07-12 2012-10-24 湖南金龙国际铜业有限公司 紫杂铜连铸连轧制杆采用的装置及工艺

Also Published As

Publication number Publication date
GB1370756A (en) 1974-10-16
FR2172100B1 (ja) 1976-05-14
FR2172100A1 (ja) 1973-09-28
DE2217010A1 (de) 1973-09-06
CH557712A (de) 1975-01-15
JPS529414B2 (ja) 1977-03-16
CA971334A (en) 1975-07-22
IT974207B (it) 1974-06-20
DE2217010C3 (de) 1974-06-20
DE2217010B2 (de) 1973-11-29
JPS4889835A (ja) 1973-11-24

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Legal Events

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AS Assignment

Owner name: ALCO INDUSTRIES, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MODERN EQUIPMENT COMPANY, A CORP OF WI;REEL/FRAME:004289/0354

Effective date: 19840217

Owner name: AII, INC., A CORP OF WI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALCO INDUSTRIES, INC., A CORP OF WI;REEL/FRAME:004289/0357

Effective date: 19840217

Owner name: MODERN EQUIPMENT COMPANY, INC.

Free format text: CHANGE OF NAME;ASSIGNOR:AII, INC.;REEL/FRAME:004289/0360

Effective date: 19840515

Owner name: ALCO INDUSTRIES, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MODERN EQUIPMENT COMPANY, A CORP OF WI;REEL/FRAME:004289/0354

Effective date: 19840217

Owner name: AII, INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALCO INDUSTRIES, INC., A CORP OF WI;REEL/FRAME:004289/0357

Effective date: 19840217