US3626479A - Continuous casting machine with channel coolant control means - Google Patents

Continuous casting machine with channel coolant control means Download PDF

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Publication number
US3626479A
US3626479A US879330A US87933069A US3626479A US 3626479 A US3626479 A US 3626479A US 879330 A US879330 A US 879330A US 87933069 A US87933069 A US 87933069A US 3626479 A US3626479 A US 3626479A
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Prior art keywords
cooling
channel
temperature
valve
casting
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US879330A
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English (en)
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Ilario Properzi
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Continuus SpA
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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
    • B22D11/06—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
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
    • 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
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process

Definitions

  • An apparatus for the adjustment of cooling for a continuous ingot casting machine of the type comprising a rotating casting wheel provided with a peripheral channel or mould which is covered along a certain are by a metal tape, said apparatus comprising means responsive to the temperature of said mould arranged at the noncovered portion of said channel, and adjustment means arranged to be actuated by the temperature responsive means in order to adjust cooling means for cooling said mould.
  • This invention relates to an apparatus for automatically adjusting the cooling in a casting machine for producing continuous metallic ingots.
  • a continuous casting machine of the rotating wheel type for producing continuous metallic bars comprises a rotating wheel provided with a channel on the peripheral surface having the shape of the ingot section which is to be obtained, this channel being covered along a certain are by a metal tape which closes the said channel and moves together with said wheel so that the'molten metal which is introduced at the beginning of the channel covered by the band is retained in the channel and leaves it in the form of a solid continuous bar where the tape abandons the channel.
  • the bar may be well formed and solidified at the point of extraction, itis necessary to provide a sufiicient controlled cooling while the wheel performs a rotation corresponding to the angle of the peripheral are covered by the metal tape.
  • the wheel In order to satisfy production requirements, which for aluminum can exceed 2 kilograms per second and double this quantity for copper, when dealing with ingots of small cross section, from 20 to 40 sq. cm. in many cases, the wheel has to carry out such angular travel in a relatively short time, for example of the order of ten seconds, because of which the cooling of the ingot down to an acceptable extraction temperature must take place with extreme rapidity and uniformity.
  • the cooling is adjusted by graduating the intensity of the cooling effects in various zones in order to favor the formation and conservation of the ingot shell (i.e. the solidified peripheral layer of the molten metal), which adheres to the walls of the mold, but this requires a more or less continuous supervision on the part of the operator and leads to a reduction in efi'lciency of the cooling itself because of its gradualness.
  • the ingot shell i.e. the solidified peripheral layer of the molten metal
  • the problem of cooling is rather delicate in that if the channel or mold of the casting wheel arrives at the filling point at too low a temperature, i.e. lower than certain practical values which vary from metal to metal (for example for pure aluminum the temperature is-about 90l20 C.), the shell, or rather the external film of the ingot being formed, cannot adhere, due also to the shrinkage to the walls of the mold because they are too cold, even if the casting pressure is high.
  • the main object of this invention is that of providing an apparatus for the automatic adjustment of cooling in casting machines, which pennits the mold to be taken to a predetermined temperature value so that the introduction of the molten metal into the mold of the casting wheel takes place under the best possible conditions, in order to obtain continuous ingots with characteristics of best quality.
  • Another object of the invention is that of providing an apparatus by means of which the temperature differences in casting wheels are reduced to a minimum so as to considerably increase their life, with simultaneous increase in production (it should be borne in mind that the channelled wheel constitutes the most costly consumable part of a casting machine).
  • Another object of this invention is that of providing an apparatus of simple construction, of reliable operation and of easy application to continuous casting machines.
  • an apparatus for the adjustment of cooling for a continuous casting machine of the type including a turning wheel provided with a peripheral channel which is partially covered by a metal tape and cooling means for said channel, wherein according to the improvement, said apparatus further comprises control means responsive to the temperature of said peripheral channel at the noncovered portion thereof and controlling the cooling intensity of said cooling means.
  • FIG. 1 shows a diagrammatic partially sectional frontal view of a casting machine provided with the device according to the invention
  • FIG. 2 is an axial sectional view of the casting wheel, to an enlarged scale, with the apparatus for adjustment according to the invention shown schematically;
  • FIG. 3 is a detailed sectional view of the channel of the casting wheel
  • FIG. 4 is a diagrammatic representation of a second embodiment.
  • FIG. 1 shows in a diagrammatic manner a continuous casting machine comprising a casting wheel 1 having a peripheral channel or mold 2 inside which a continuous ingot 3 is formed.
  • the said mold 2 is closed for about one-half of the circumference of the shell 1 by a steel tape 4 which is guided adjacent the wheel I by two rollers 5 and 6 and wound round intermediate pulleys 7 and 8.
  • FIG. 1 also shows an upper container 9 for the molten metal with corresponding control members, and internal and external cooling devices, 10 and I1 respectively, which embrace the wheel I for a certain arc of a circle. Said cooling devices 10 and 11 cause the molten metal to solidify so that the latter is converted into the continuous ingot 3, while the wheel 1 is made to rotate continuously.
  • the external cooling device 11 comprises a plurality of nozzles Ila arranged in pairs and directed so as to spray a cooling fluid, for example softened water, on to the external surface of the tape 4.
  • the internal cooling device I0 comprises a plurality of nozzles 10a arranged to spray the cooling water on to the internal surface of the mold 2.
  • Said nozzles 10a are connected to radial pipes 12 (FIG. 2 whose other ends communicate with a central fixed distributor 13 which is connected to an axial pipe 14.
  • FIG. 2 also shows two gears I5 and 16' which transmit rotary motion to the casting wheel 1.
  • the rate of flow of cooling water through the axial pipe 14 is adjusted by means of a valve I5 which is movable by means of an electric motor I6, for example of the two-phase alternating current type, through a suitable reduction gear 17.
  • the phase voltage of the motor 16 is adjusted by means of a voltage modulator 18 which is controlled by an electronic amplifier 19, for example of the transistor type (FIG. 2).
  • the input to the electronic amplifier 19 consists of two electrical conductors 20 which are connected to a ribbon thermocouple 21 mounted so as to slide on the bottom of the channel 2 at the upper part of the wheel I between the introduction of the molten metal and the point of extraction of the formed ingot 3 (FIG. I).
  • the thermocouple 21 is pushed downwards by a counterweight 22 (FIG. I).
  • the apparatus acts on the internal cooling device 10 so as to adjust the flow of water through the nozzles 10a towards the mold 2 (FIG. 3), according to the temperature sensed" by the thermocouple 21.
  • the desired temperature of the mold portion reaching the filling point is first chosen by setting the regulator of the voltage modulator 18.
  • an automatic adjustment of the flow of cooling water through the axial pipe 14, is effected so as to obtain the desired cooling action.
  • thermocouple 21 The signal from the thermocouple 21 is in fact amplified by the amplifier l9 and sent to the voltage modulator 118 which makes the electric motor I6 act in one direction or the other, according to the direction in which the temperature sensed by the thermocouple 21 varies with respect to the prefixed temperature. In other words if the temperature of the mold 2 tends to increase with respect to the preestablished value, the valve will be opened and increases the flow of cooling water through the axial pipe 14 and hence through the nozzles 100.
  • Casting under pressure when coupled with the apparatus for automatic cooling adjustment according to the invention gives rise to a production in which there is the maximum possible transfer of thermal energy from the ingot being formed to the cooling fluid, while excellent quality of superficial and internal structure of the continuous bar obtained is guaranteed.
  • the output signal in millivolts (mV) of the thermocouple 21 is sent to a transductor 119, which converts the mV signal into milliamperes (mA).
  • the mA signal is introduced into a converter I20, which transforms the mA signal into p.s.i. It is thus obtained a signal in p.s.i. (air pressure) which is variable and is a function of the temperature sensed by the thermocouple.
  • This p.s.i. signal is sent to a regulating and recording instrument 121 capable to regulate or set the valve 122, which controls the rate of flow of water through the supply pipe 14 for water supply to the internal cooling system.
  • thermocouple 21 for each temperature value sensed by the thermocouple 21 there is a corresponding signal expressed in p.s.i. sent to the regulating and recording instrument 1121 and a corresponding aperture of the regulating valve 122, controlled by the instrument 121.
  • thermocouple 21' The instruments 119, 120, 121, I22 and the thermocouple 21' are of commercially available types, known in the art.
  • thermocouple 21' used was of iron-constantan type, mounted on a small are carried by a swinging arm and supported against the bottom of the channel of the copper ring of the wheel, with a constant pressure determined by an adjustable weight.
  • This thermocouple used was of the type M 105 manufactured by the Italian firm Vittorio Piani of Corso Magenta, 56, Milan, Italy.
  • the transductor mV/mA 1 19 was of the type 43,900 of the Electrofact N.A., a Company of Amersfort, Holland.
  • the electropneumatic transductor I20 mAp.s.i. was of the type T-IS of the same Dutch company.
  • the circuit comprises also an air filtering reducer 123 of the type FRA-120, specification 2l0.00l-l of the firm J.S.P. of Via Bordoni 32, Milan, Italy.
  • the pneumatic regulating and recording instrument was of the type 3,682 manufactured by the Italian Company Soc. OBSA S. p.A.
  • the instrument type 3,682 of this company besides effecting the above-described regulation, is provided with a recording diagram on which a first pen records the temperature sensed by the thermocouple and a second pen records the pressure of water downstream of the regulating valve I22, i.e. at the internalcooling distributor 13.
  • the regulating valve I22 was of the diaphragm type 5,9l2 Fluxotrol, with flange connectors DN 32 PN l6 and with a diaphragm servomotor, as manufactured by the Soc. Fluxotrol S.p.A., an Italian Company of Via Mauro Macchi 26, Milan, and represented by the Firm J.S.P. of Via Bordoni, 32, Milan, Italy, specification N. 270002/1.
  • the system according to the invention regulates the aperture of the valve as a function of the temperature sensed and records the temperature of the wheel ring and the pressure of water at the internal cooling water distributor 13.
  • the instrument 121 records on the same diagram the temperature sensed by the thermocouple and the rate of flow of water sent for the internal cooling of the casting machine, in liters/min.
  • the casting machine carried out into practice and provided with this automatically controllable cooling system had a diameter of the casting wheel of 1,400 mm., with a casting section of 3,460 mm. Molten aluminum has been used for conductors. The casting wheel rotated at a speed of 3 rpm. corresponding to a calculated production of about 7,000 kg./hour ingot.
  • the molten metal had a temperature within the crucible of the casting machine of 700 C.
  • the ingot outgoing from the wheel had a temperature of about 540 C.
  • the temperature of the wheel ring, measured by the thermocouple on the bottom of the channel was set for [25 C.
  • the water pressure recorded during the operation oscillated within a range between 0.8 and L8 kg/cm
  • the closing stroke of the regulating valve was mechanically limited so that the pressure within the cooling distributor could never be lower than 0.4 atmospheres.
  • thermocouple which slides on the tape 4.
  • An apparatus for the adjustment of cooling for a continuous casting machine of the type including a turning wheel provided with a peripheral casting channel which has a portion thereof covered by a metal tape and a noncovered portion thereof, cooling means for said channel and control means for controlling the cooling intensity of said cooling means, wherein according to the improvement the apparatus further comprises temperature sensing means arranged in the reach of the noncovered portion of said peripheral channel and sensing the temperature thereof, said control means being responsive to the temperature of said noncovered portion of the casting channel sensed by the sensing means.
  • said casting channel has a bottom and wherein, according to the improvement said sensing means comprise a ribbon thermocouple sliding on the bottom of the noncovered portion of said peripheral casting channel and near to the filling point of the molten metal.
  • cooling means comprises a plurality of nozzles directing the cooling fluid on portions of said casting channel and said tape
  • control means comprises an axial feed pipe for the cooling fluid and a valve in said axial feed pipe for controlling the flow of cooling fluid therethrough, an electric motor with adjustably phase voltage and having transmission means connected with said valve, a modulator adapted to adjust the phase voltages of said motor, an amplifier having its input connected to said thermocouple and controlling said modulator,
  • said motor being adapted to adjust said valve when its phase voltage is adjusted by said modulator.
  • An apparatus as claimed in claim 4 wherein said pneumatically operated regulating instrument comprises a recording section continuously recording the signals received.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US879330A 1968-11-25 1969-11-24 Continuous casting machine with channel coolant control means Expired - Lifetime US3626479A (en)

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IT2414768 1968-11-25

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US (1) US3626479A (enrdf_load_stackoverflow)
JP (1) JPS4916705B1 (enrdf_load_stackoverflow)
FR (1) FR2024146B1 (enrdf_load_stackoverflow)
GB (1) GB1292851A (enrdf_load_stackoverflow)
NL (1) NL6917631A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155396A (en) * 1975-02-10 1979-05-22 Hazelett Strip-Casting Corporation Method and apparatus for continuously casting copper bar product
US4300618A (en) * 1978-01-10 1981-11-17 Giulio Properzi Fixable width casting wheel
WO1984002669A1 (en) * 1983-01-03 1984-07-19 Southwire Co Individually controlled spray nozzle system and method of use for caster
US4957155A (en) * 1988-08-04 1990-09-18 Zdenek Trnka Cooling system for continuous casting machines
WO1995026841A1 (en) * 1994-03-30 1995-10-12 Lauener Engineering, Ltd. Method and apparatus for continuously casting metal
US5538041A (en) * 1993-09-09 1996-07-23 Hansa Metallwerke Ag Sanitary single-lever mixer valve
US6125915A (en) * 1994-03-30 2000-10-03 Golden Aluminum Company Method of and apparatus for cleaning a continuous caster
AU733447B2 (en) * 1994-03-30 2001-05-17 Nichols Aluminum-Golden, Inc. Method and apparatus for improving the quality of continuously cast metal
US6354364B1 (en) 1994-03-30 2002-03-12 Nichols Aluminum-Golden, Inc. Apparatus for cooling and coating a mold in a continuous caster
US20020189815A1 (en) * 2001-06-12 2002-12-19 Johnson Craig D. Flow control regulation method and apparatus
WO2003064078A1 (en) * 2002-01-30 2003-08-07 Heggset, Engineering, As Casting wheel for continuous casting of metal
CN107755653A (zh) * 2017-10-17 2018-03-06 江苏粤阜合金材料有限公司 一体化铝带压轧修边生产线
CN109137028A (zh) * 2018-08-29 2019-01-04 江苏邦润智能科技有限公司 一种带电过线轮的驱动装置
CN113560513A (zh) * 2021-08-11 2021-10-29 福州丹文科技有限公司 一种铜杆连铸连轧自动控制系统
CN113798454A (zh) * 2021-10-27 2021-12-17 领胜城科技（江苏）有限公司 一种抵接定位式纳米晶制带用冷却辊

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785428A (en) * 1972-03-02 1974-01-15 Hazelett Strip Casting Corp Wheel-belt continuous casting machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279000A (en) * 1963-12-30 1966-10-18 Southwire Co Apparatus for continuous casting of metal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300821A (en) * 1964-08-14 1967-01-31 Gen Motors Corp Battery grid casting method and machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279000A (en) * 1963-12-30 1966-10-18 Southwire Co Apparatus for continuous casting of metal

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155396A (en) * 1975-02-10 1979-05-22 Hazelett Strip-Casting Corporation Method and apparatus for continuously casting copper bar product
US4300618A (en) * 1978-01-10 1981-11-17 Giulio Properzi Fixable width casting wheel
WO1984002669A1 (en) * 1983-01-03 1984-07-19 Southwire Co Individually controlled spray nozzle system and method of use for caster
US4957155A (en) * 1988-08-04 1990-09-18 Zdenek Trnka Cooling system for continuous casting machines
US5538041A (en) * 1993-09-09 1996-07-23 Hansa Metallwerke Ag Sanitary single-lever mixer valve
AU733447B2 (en) * 1994-03-30 2001-05-17 Nichols Aluminum-Golden, Inc. Method and apparatus for improving the quality of continuously cast metal
US5697423A (en) * 1994-03-30 1997-12-16 Lauener Engineering, Ltd. Apparatus for continuously casting
US5839500A (en) * 1994-03-30 1998-11-24 Lauener Engineering, Ltd. Apparatus for improving the quality of continously cast metal
AU699123B2 (en) * 1994-03-30 1998-11-26 Golden Aluminum Company Method and apparatus for continuously casting metal
US6019159A (en) * 1994-03-30 2000-02-01 Golen Aluminum Company Method for improving the quality of continuously cast metal
US6089308A (en) * 1994-03-30 2000-07-18 Nichols Aluminum Method and apparatus for improving the quality of continuously cast metal
US6125915A (en) * 1994-03-30 2000-10-03 Golden Aluminum Company Method of and apparatus for cleaning a continuous caster
WO1995026841A1 (en) * 1994-03-30 1995-10-12 Lauener Engineering, Ltd. Method and apparatus for continuously casting metal
US6354364B1 (en) 1994-03-30 2002-03-12 Nichols Aluminum-Golden, Inc. Apparatus for cooling and coating a mold in a continuous caster
US6786285B2 (en) * 2001-06-12 2004-09-07 Schlumberger Technology Corporation Flow control regulation method and apparatus
US20020189815A1 (en) * 2001-06-12 2002-12-19 Johnson Craig D. Flow control regulation method and apparatus
WO2003064078A1 (en) * 2002-01-30 2003-08-07 Heggset, Engineering, As Casting wheel for continuous casting of metal
US20050045302A1 (en) * 2002-01-30 2005-03-03 Heggset Bjarne A. Casting wheel for continuous casting of metal
US6962190B2 (en) 2002-01-30 2005-11-08 Heggset Engineering A.S. Casting wheel for continuous casting of metal
CN107755653A (zh) * 2017-10-17 2018-03-06 江苏粤阜合金材料有限公司 一体化铝带压轧修边生产线
CN107755653B (zh) * 2017-10-17 2019-05-17 江苏粤阜合金材料有限公司 一体化铝带压轧修边生产线
CN109137028A (zh) * 2018-08-29 2019-01-04 江苏邦润智能科技有限公司 一种带电过线轮的驱动装置
CN109137028B (zh) * 2018-08-29 2023-09-19 江苏邦润智能科技有限公司 一种带电过线轮的驱动装置
CN113560513A (zh) * 2021-08-11 2021-10-29 福州丹文科技有限公司 一种铜杆连铸连轧自动控制系统
CN113560513B (zh) * 2021-08-11 2022-10-11 福州丹文科技有限公司 一种铜杆连铸连轧自动控制系统
CN113798454A (zh) * 2021-10-27 2021-12-17 领胜城科技（江苏）有限公司 一种抵接定位式纳米晶制带用冷却辊

Also Published As

Publication number Publication date
JPS4916705B1 (enrdf_load_stackoverflow) 1974-04-24
NL6917631A (enrdf_load_stackoverflow) 1970-05-27
DE1958669A1 (de) 1970-06-04
FR2024146A1 (enrdf_load_stackoverflow) 1970-08-27
FR2024146B1 (enrdf_load_stackoverflow) 1974-05-03
DE1958669B2 (de) 1973-01-25
GB1292851A (en) 1972-10-18

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