US3685570A - Means for casting - Google Patents

Means for casting Download PDF

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Publication number
US3685570A
US3685570A US154046A US3685570DA US3685570A US 3685570 A US3685570 A US 3685570A US 154046 A US154046 A US 154046A US 3685570D A US3685570D A US 3685570DA US 3685570 A US3685570 A US 3685570A
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United States
Prior art keywords
melt
space
spaces
channels
casting
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Expired - Lifetime
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US154046A
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English (en)
Inventor
Bengt Fredrikson
Stein Larsen
Erkki Suvanto
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Individual
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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
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • 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
    • B22D39/06—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal

Definitions

  • a first part comprises an inlet part to be filled with melt from a melting furnace, a second part com- Nov. 14, 1968 Sweden ..l543l/68 municates with the lower portion of the first part and is provided with at least one gas inlet and is connected [52] US. Cl. ..164/251, l3/29, l64/28l to at least one inductive heating unit of the Channel Int. Cl 11/10, 322d 27/02 type induction furnace type, and a part has an [58] Field of Search 1 64/25 1 51, 281, 266; 13/29 outlet nozzle or casting opening for feeding melt into a casting equipment, which third part communicates with the lower portion of the second part.
  • the present invention relates to a means for casting, such as dipforming wire, continuous casting or the like.
  • the invention consists of a furnace or container divided into at least three spaces, the first part comprising an inlet part to be filled with melt from a melting furnace, a second part, the furnace hearth, communicating with the lower part of the first-mentioned part, provided with at least one gas inlet and connected to at least one inductive heating unit of the channel-type induction furnace type, and a third part, the outlet part, with a nozzle or casting opening for feeding melt into casting equipment, the third part communicating with the hearth part.
  • Such an arrangement provides considerably more effective utilization of the furnace (container) spaces, and, because of the presence of heating or heat-retaining members in the hearth part, the melt is prevented from freezing in the furnace spaces.
  • the well-known pinch effect in the channels of the inductor unit also has a certain pressure effect on the melt in the hearth part, which also provides a certain stirring and temperature-equalization effect, without having to use separate stirrers.
  • the inlet part communicates with the hearth part and the hearth part with the outlet part at the.
  • lower parts of the spaces and the levels of the melt can be adjusted by varying the gas pressure on the surface of the hearth part and thus, because of the law for communicating vessels, in the outlet part as well, and the surface can be kept above or below the upper edge of the outlet nozzle to the casting crucible and varied as required by altered outlet level and other conditions.
  • the level can be adjusted without much risk of variations in level, the formation of waves or the like which might otherwise cause disturbance.
  • FIGS. 1 and 2 show in vertical and horizontal cross-section respectively (FIG. 1 on the line A-A of FIG. 2) the casting equipment and FIG. 3 shows in principle so-called dip-forming of wire.
  • FIG. 3 shows how melt is fed by hydrostatic pressure through a nozzle 11 around a passing wire 12 in a casting chamber.
  • the melt and the wire should be of the same material.
  • the wire emerging from the casting crucible has naturally greater dimensions than that entering the crucible and can be drawn or rolled to the desired dimensions, and possibly used again as corewire for further wire production. It must of course be possible to vary the level in the casting crucible and there should not be any noticeable amount of slag or other impurities in the melt fed in (Cu, Al or some other metal or alloy).
  • FIGS. 1 and 2 The fumace or container from which the melt is fed into the casting crucible is shown in FIGS. 1 and 2.
  • Melt is filled into the siphon-shaped inlet 13 (FIG. 2) and this shape enables slag and lining particles to be easily removed from the surface of the melt in this inlet by means of slag-removing members (not shown).
  • the inlet 13 communicates, preferably at its lower part, through a passage 21 with the lower part of a central part, the hearth 14, to which at least one inductor unit 15 of the channel-type induction furnace type (submerged-resistor type) is connected, suitably replaceable in accordance with Swedish patent No. 185,973.
  • At least one conduit 16 for gas opens out over the melt surface in the space 14 and, by means of a gas supply member, not shown in the drawings, the desired pressure and thus the desired level of the melt can be adjusted in the space 14.
  • the lower part of the hearth l4 communicates through a passage 22 with the lower part of an outlet part 17 having a nozzle or casting opening 18.
  • the correct level can be chosen in the outlet part 17, suitably above or below the upper edge of the nozzle 18.
  • the inductor 15 is provided with melt channels 23 opening entirely into the second space 14, but close to the connecting passages 21 and 22 leading to the first space 13 and third space 17, respectively.
  • the melt channels run perpendicular to the connecting passages.
  • the changes in pressure, caused by the pincheffect will appear in the second chamber 14, but oscillations in the melt surface in this space will be equalized or damped out in the connecting channel 22 to the third chamber 17 and in the third chamber 17 and they will not cause any uneven spraying at the nozzle 18 or the like.
  • the equipment can thus be made relatively free of disturbances. There is no risk of the melt becoming cold since the heating unit (inductor unit(s) can be given sufficient power to prevent this, even in the outlet part 17.
  • the latter may be provided with a removable lid 19 for inspection and cleaning.
  • the chambers 13 and 17 are both located on the same side of the hearth 14, and the connecting passages 21 and 22 thus extend from the same side of the hearth.
  • the melt channels 23 open into the bottom of the hearth offset from the center of the hearth and adjacent the openings thereinto of the connecting passages.
  • Protective gas may be supplied to the outlet part 17 and, through a special smaller channel 20, to the inlet part. This may also be introduced in the rest of the system in order to prevent oxidization of the melt, and
  • the whole equipment should be made gas-tight.
  • the means is used for dip-forming wire, but it may also be used with the same good results for continuous casting or other similar processes, and
  • Means for continuous casting comprising a furnace divided into three spaces, the first space comprising an inlet part adapted to be filled with melt from a melting furnace, the second space being provided with a least one gas inlet and having at least one inductor unit of submerged resistor type connected therewith and with the ends of its melt channels ending in said second space, means separating the first and second spaces except for one connecting passage at the lower portion of said first and second spaces, means separating the second and third spaces except for one connecting passage at the lower portion of the second and third spaces, and a nozzle communicating with the third space at a substantial distance below the top thereof, opening into a continuous casting device, the melt channels of the inductors opening into the second space adjacent the openings of the connecting channels into such second space to provide stirring and homogenization in said second space and to prevent freezing of the melt in said connecting channels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US154046A 1968-11-14 1971-06-17 Means for casting Expired - Lifetime US3685570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15431/68A SE324863B (de) 1968-11-14 1968-11-14

Publications (1)

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US3685570A true US3685570A (en) 1972-08-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US154046A Expired - Lifetime US3685570A (en) 1968-11-14 1971-06-17 Means for casting

Country Status (5)

Country Link
US (1) US3685570A (de)
DE (1) DE1956550C3 (de)
FR (1) FR2023247A1 (de)
GB (1) GB1279667A (de)
SE (1) SE324863B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991263A (en) * 1973-09-03 1976-11-09 Allmanna Svenska Elektriska Aktiebolaget Means for tapping
US4844147A (en) * 1985-11-12 1989-07-04 Fujikura Ltd. Dip forming apparatus for continuously forming cast rod

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE758998A (fr) * 1969-11-18 1971-04-30 Fischer Ag Georg Recipient destine a recevoir et debiter du metal liquide
US4200143A (en) * 1977-07-28 1980-04-29 General Motors Corporation Continuous horizontal caster
DE2825360C2 (de) * 1978-06-09 1983-10-27 Fried. Krupp Gmbh, 4300 Essen Induktiv beheizte Rinne zum Zuführen von Metall in eine Stranggießkokille

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648716A (en) * 1949-11-10 1953-08-11 Thompson Prod Inc Induction furnace
US2936326A (en) * 1955-05-02 1960-05-10 Ajax Magnethermic Corp Method and apparatus for pressure metal dispensing
US3095464A (en) * 1960-02-11 1963-06-25 Tagliaferri Aldo Forehearth or holding furnace for heating molten metals, equipped with stirrer and induction heater
US3484280A (en) * 1967-04-04 1969-12-16 Gen Electric Atmosphere control in dip-forming process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US58180A (en) * 1866-09-18 Improved burning-fluid
DE30244C (de) * H. FLAD in St. Louis, V. St. A Elektrisch gesteuerte Ventile bei Eisenbahn-Luft-Bremsen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648716A (en) * 1949-11-10 1953-08-11 Thompson Prod Inc Induction furnace
US2936326A (en) * 1955-05-02 1960-05-10 Ajax Magnethermic Corp Method and apparatus for pressure metal dispensing
US3095464A (en) * 1960-02-11 1963-06-25 Tagliaferri Aldo Forehearth or holding furnace for heating molten metals, equipped with stirrer and induction heater
US3484280A (en) * 1967-04-04 1969-12-16 Gen Electric Atmosphere control in dip-forming process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991263A (en) * 1973-09-03 1976-11-09 Allmanna Svenska Elektriska Aktiebolaget Means for tapping
US4844147A (en) * 1985-11-12 1989-07-04 Fujikura Ltd. Dip forming apparatus for continuously forming cast rod

Also Published As

Publication number Publication date
FR2023247A1 (de) 1970-08-07
GB1279667A (en) 1972-06-28
DE1956550B2 (de) 1973-03-29
DE1956550C3 (de) 1974-01-03
SE324863B (de) 1970-06-15
DE1956550A1 (de) 1970-11-05

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