US3884291A - Apparatus for production of castings from alloys of metals and gases - Google Patents

Apparatus for production of castings from alloys of metals and gases Download PDF

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Publication number
US3884291A
US3884291A US863308A US86330869A US3884291A US 3884291 A US3884291 A US 3884291A US 863308 A US863308 A US 863308A US 86330869 A US86330869 A US 86330869A US 3884291 A US3884291 A US 3884291A
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US
United States
Prior art keywords
chamber
mould
gas
molten metal
production
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
US863308A
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English (en)
Inventor
Angel Tontchev Balevski
Ivan Dimov Nikolov
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.)
Institute po Metaloznanie i Technologia na Metalite
INSTITUT PO METALOZNANIE I TECHNOLOGIA NA METALITE
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Institute po Metaloznanie i Technologia na Metalite
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.)
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Publication date
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Publication of US3884291A publication Critical patent/US3884291A/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Definitions

  • a reservoir for molten metal is disposed in a first, hermetically closed chamber, in which an atmosphere under pressure is created by the gas to be dissolved in the metal.
  • a compression casting cylinder is provided, such cylinder being connected with the mould, which is disposed in a second chamber. By means of a system of pipes and valve the second chamber may selectively be connected to the first chamber and to a source of gas under pressure.
  • the invention relates to an apparatus for theproduction of shaped castings from metals or metal alloys which contain in solid state a dissolved or chemically bound appropriately chosen gas in such quantity as to exert an advantageous influence on the physical, chemical or other properties of the material obtained.
  • An apparatus permitting the production of castings from such alloys, in which the reservoir for molten metal and the mould are disposed in separate, hermetically closed chambers, which are under the action of the pressure of an atmosphere composed of the gas to be dissolved and some other gas, which is inert to the metal.
  • gases are employed in such a proportion, that the partial pressure of the gas to be dissolved in the chamber with the mould is higher than that in tle chamber with the reservoir for molten metal.
  • the gas, which is dissolved in the melt at a low partial pressure to remain in the solidifying or already solidified casting because of the high partial pressure of the same gas in the atmosphere in which the mould is placed.
  • This improvement eliminates the said disadvantage only to a certain degree, since it is extremely difficult from a design point of view efficiently to seal the barrier of the delivery ripe at great pressure differences; furthermore, the synchronization of of the operation of the said barrier and the inlet of the gas with high pressure, on the one hand, and the process of solidification of the melt in the mould on the other, creates problems that are difficult to solve, since it such synchronization depends on the shape and size of each individual casting.
  • the object of the present invention to overcome the limitations of the existing methods for obtaining such alloys of metals and gases.
  • the invention is particularly applicable to the case in which the solubility of the gas when the melt changes over in solid state is reduced to such a degree that, when controlled by means of the difference in the partial pressures acting upon the melt and the solidifying mould, it is not possible to obtain sufficiently high gas content in the alloy.
  • this problem is solved by delivering the melt, which is saturated with gas by a known method, in a pressure cylinder, from which it is forced by means of piston pressure in the mould, where an atmosphere of the gas to be dissolved with an appropriately selected pressure has been produced in advance. While the melt enters the mould, the gas therein is pressurized to such a degree that can be determined in advance by means of an appropriate selection of the size of a feeder head of the moulds, or by means of the action of a second gas piston, thereby reducing or increasing as desired the final compressed volume of the gas to be dissolved in the chamber where the mould is disposed.
  • the apparatus makes it possible to carry out the solidification process of the melt in the mould at a pressure of the gas to be dissolved which is considerably higher than the pressure at which the melt is saturated.
  • the gas does not separate during the solidification period, but remains in the solid solution.
  • a reservoir for molten metal 1 is disposed, together with a heating device 2, in a hermetically closed and heat-insulated chamber 3.
  • the melt may be drawn into the casting system through the delivery pipe 4 and a known stopper device 5.
  • the gas reservoir 6 contains the gas to be dissolved which is delivered to the melt through the cock 7, respectively to the bottom of the reservoir for the melt 1.
  • a chamber 3 containing the reservoir for the melt l is connected through the cock 9 with the chamber 10, wherein the mold 11 is disposed.
  • the mould is provided in its upper end with a feeder head 12 intended to collect the gas contained in the mould, when the said mould is filled with molten metal.
  • the molten metal is forced into the mould through a cylinder 14 by means of a pressure exerted by a piston 15 on the said molten metal.
  • the gas contained in the chamber of the mould may be directed by means of a cock 13 in a circulation-regenerative system 16, from where it can again be returned to the gas reservoir 6 through a pipe system and a cock 17.
  • a compression cylinder 19 with a piston 20 may be attached to the chamber with the mould.
  • the apparatus according to the present invention operates in the following way:
  • the pressure in chamber 3 is increased in comparison with the pressure in the mould 11, while a specified portion of metal is directed into the pressure cylinder 14.
  • a portion of molten metal is forced by means of the piston 15 into the mould 11, such metal overcoming the gas pressure which acts in its cavity and has been created beforehand by the entrance through the cock 9 of an atmosphere of the gas to be dissolved, said gas entering from the reservoir 6.
  • the gas contained in the mould is forced into the cavity of the feeder head 12 thus creating above the the melt a gaseous atmosphere with a pressure equal to that exerted by the compression piston 20.
  • the compression cylinder 19 may, at a specific proportion of the volumes, replace the action of the feeder head 12; in other cases the additional increase in pressure by means of said cylinder may be found to be unnecessary.
  • Apparatus for the production of alloys of metals and gases comprising a first, hermetically closed chambet, a reservoir for molten metal disposed in said first chamber, means for creating in said first chamber an atmosphere under pressure of the gas to be dissolved in the metal, a second chamber, a mould to be charged with molten metal from said reservoir disposed in the second chamber, means for injecting the molten metal into the mould, and conduit means for selectively connecting the second chamber to the first chamber and to the means for creating gas under pressure.
  • An apparatus for production of castings according to claim 2 comprising a gas compression device including a cylinder with a piston communicating with the interior of the second chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Dental Prosthetics (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US863308A 1968-10-10 1969-10-02 Apparatus for production of castings from alloys of metals and gases Expired - Lifetime US3884291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG1079368 1968-10-10

Publications (1)

Publication Number Publication Date
US3884291A true US3884291A (en) 1975-05-20

Family

ID=3897326

Family Applications (1)

Application Number Title Priority Date Filing Date
US863308A Expired - Lifetime US3884291A (en) 1968-10-10 1969-10-02 Apparatus for production of castings from alloys of metals and gases

Country Status (14)

Country Link
US (1) US3884291A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT300226B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE739954A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH504260A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1951010C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK123572B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES372141A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2020319A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1269145A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
LU (1) LU59587A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL162577C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO130507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE366486B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SU (1) SU496708A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030538A (en) * 1975-07-07 1977-06-21 Groupement pour les Activities Atomiques et Advancees "GAAA" S.A. Device for adjusting the quantity of molten metal used in pressure casting
US4828460A (en) * 1986-08-13 1989-05-09 Toshiba Kikai Kabushiki Kaisha Electromagnetic pump type automatic molten-metal supply apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG27599A1 (en) * 1978-01-25 1979-12-12 Nikolov Method of metal and other materials casting under pressure and apparatus for realising the method
DE2846519A1 (de) * 1978-10-25 1980-05-08 Dieter Dr Ing Leibfried Niederdruckgiessverfahren fuer metalle, insbesondere ne-metalle
DE2846512A1 (de) * 1978-10-25 1980-05-08 Dieter Dr Ing Leibfried Maschine zum druckgiessen von metallen, insbesondere legierten eisenmetallen (stahl)
DE3134398C2 (de) * 1981-08-31 1983-07-21 Hans Christoph 8000 München Heilos Verfahren und Vorrichtung zur Herstellung von Druckgußstücken
DE3238598C2 (de) * 1982-10-19 1986-06-05 Joachim Dipl.-Ing. 8000 München Schmidt Vorrichtung zur Druckbeaufschlagung einer Schmelze durch einen mit Innendruck beaufschlagten Federbalg aus visko- oder viskoelastischen Materialien
FR2535231B1 (fr) * 1982-10-27 1987-01-23 Inst Po Metalloznanie I Tekno Procede pneumatique a piston pour la coulee de metaux et d'autres materiaux, et equipement pour sa realisation
DE3240242A1 (de) * 1982-10-29 1984-05-03 Institut po Metalosnanie i Technologia na Metalite, Sofija Verfahren und vorrichtung zum giessen von metallen und anderen werkstoffen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181157A (en) * 1938-11-16 1939-11-28 Aluminum Co Of America Method and apparatus for pressure casting
US2195360A (en) * 1938-12-02 1940-03-26 John R Daesen Die casting apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181157A (en) * 1938-11-16 1939-11-28 Aluminum Co Of America Method and apparatus for pressure casting
US2195360A (en) * 1938-12-02 1940-03-26 John R Daesen Die casting apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030538A (en) * 1975-07-07 1977-06-21 Groupement pour les Activities Atomiques et Advancees "GAAA" S.A. Device for adjusting the quantity of molten metal used in pressure casting
US4828460A (en) * 1986-08-13 1989-05-09 Toshiba Kikai Kabushiki Kaisha Electromagnetic pump type automatic molten-metal supply apparatus

Also Published As

Publication number Publication date
NL6915178A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-04-14
ES372141A1 (es) 1971-11-01
CH504260A (de) 1971-03-15
LU59587A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-01-09
AT300226B (de) 1972-07-25
FR2020319A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-10
NO130507B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-09-16
SE366486B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-29
DE1951010C3 (de) 1978-08-10
BE739954A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-03-16
SU496708A3 (ru) 1975-12-25
GB1269145A (en) 1972-04-06
DE1951010B2 (de) 1977-12-01
NO130507C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-12-27
NL162577C (nl) 1980-06-16
DE1951010A1 (de) 1970-04-23
NL162577B (nl) 1980-01-15
DK123572B (da) 1972-07-10

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