EP0243287A1 - Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium - Google Patents

Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium Download PDF

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Publication number
EP0243287A1
EP0243287A1 EP87420105A EP87420105A EP0243287A1 EP 0243287 A1 EP0243287 A1 EP 0243287A1 EP 87420105 A EP87420105 A EP 87420105A EP 87420105 A EP87420105 A EP 87420105A EP 0243287 A1 EP0243287 A1 EP 0243287A1
Authority
EP
European Patent Office
Prior art keywords
mold
holes
created
enclosure
molding
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.)
Withdrawn
Application number
EP87420105A
Other languages
German (de)
English (en)
French (fr)
Inventor
Marc Santarini
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.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
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 Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP0243287A1 publication Critical patent/EP0243287A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • the present invention relates to a quoyde molding of thin and large parts in aluminum alloys.
  • French patent 1,178,083 teaches: "the use of a mold constituted by a sintered and porous material placed in an enclosure in which a relative vacuum is created or includes suction channels so that the liquid metal being introduced into the mold by simple gravity, atmospheric pressure allows the metal to perfectly match the internal profile of the mold through the pores from which the air which previously filled said mold is released. possible to easily produce parts perfectly reproducing the profile of the imprint of the mold ".
  • this material is a sintered metal
  • machining does not completely solve this problem of precision because, more often than not, these sintered metals tend to deform when hot.
  • the plug does not occupy the entire thickness of the mold, it is connected to the enclosure by the hole in which it is fitted or by a hole drilled behind the porous plug and which communicates with the enclosure under vacuum , so that this depression can also be transmitted.
  • This latter arrangement makes it possible to reduce the quantity of porous material.
  • These plugs preferably have a diameter of less than 20 mm and therefore have a very reduced contact surface with the cast metal so that the machining problems posed by the fully porous molds are nonexistent here.
  • holes are preferably placed at the locations of the mold furthest from the place of supply because it is there in general that the evacuation of the air takes place in the worst conditions.
  • the quantity of holes necessary to obtain the best results it obviously depends on the dimensions of the mold. However, it has been found that a hole area at most equal to 50% of the surface of the molded part is perfectly suitable.
  • the vacuum it is a function of the dimensions of the mold, the shape of the part, the number and the arrangement of the plugs. The range of values used is therefore very wide and between 1.10 5 Pa and 1.10 3 Pa.
  • the enclosure can completely surround the mold or on the contrary form two separate parts each in relation with one of the half-shells of the mold so that one can then, at will, create depression on one or the other or on both sides of the molded part.
  • the vacuum is generally made when the mold is supplied with metal but, it can be offset from this moment and preferably it will be done soon after this moment.
  • the vacuum circuit of such a device can be slaved to the supply of the mold by means of control and regulation devices known elsewhere.
  • a mold (1) comprising a conventional lower half-shell (2) and an upper half-shell (3) which according to the invention has porous channels (4) passing through, in the present case, the entire thickness of the mold.
  • These half-shells are partially separated from each other by a gap (5) or imprint of shape corresponding to that of the part to be molded.
  • This imprint is related to a liquid metal supply system composed of a pouring basin (6) pierced at its bottom with an orifice which can optionally be closed by a stopper (7) and which is extended by piping.
  • (8) passing through the upper half-shell up to the level of the cavity and equipped with a metal passage detection probe (9).
  • the vacuum circuit comprising from upstream to downstream a vacuum pump (10), a balloon (11) of large dimensions equipped with a pressure gauge (12), a manual valve (13) , a solenoid valve (14), an adjustable timer (15) connected to the probe (9), a pipe (16) in connection with the enclosure (17) which in this case covers only the top of the upper half-shell .
  • the enclosure (17) is connected to the vacuum circuit in which the valve (13) is open and the solenoid valve (14) closed .
  • the desired vacuum value is displayed on the regulator pressure gauge (12) and the pump (10) is started.
  • the metal is then poured into the basin (6) and the stopper (7) raised; the arrival of the metal in the channel (8) is detected by the probe (9) and the signal transmitted to the timer (15).
  • the air contained in the enclosure (17), the channels (9) and the imprint (5) then escapes through the piping (16) and the metal then gradually fills the imprint down to its smallest recesses.
  • the timer (15) may possibly include a second index which will control the closing of the solenoid valve (14) after a desired time of application of the vacuum.
  • the mold is opened, the part is extracted and the installation ready for a new casting.
  • This device is applicable to a piece molded horizontally but it is obvious that it can be transposed to a piece cast vertically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Powder Metallurgy (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP87420105A 1986-04-23 1987-04-21 Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium Withdrawn EP0243287A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8606558A FR2597770A1 (fr) 1986-04-23 1986-04-23 Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium
FR8606558 1986-04-23

Publications (1)

Publication Number Publication Date
EP0243287A1 true EP0243287A1 (fr) 1987-10-28

Family

ID=9334986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420105A Withdrawn EP0243287A1 (fr) 1986-04-23 1987-04-21 Dispositif de moulage de pieces minces et de grandes dimensions en alliages d'aluminium

Country Status (13)

Country Link
EP (1) EP0243287A1 (ko)
JP (1) JPS62254957A (ko)
KR (1) KR870009791A (ko)
BR (1) BR8701899A (ko)
DK (1) DK202187A (ko)
FI (1) FI871751A (ko)
FR (1) FR2597770A1 (ko)
IL (1) IL82241A0 (ko)
IS (1) IS3217A7 (ko)
MA (1) MA20950A1 (ko)
NO (1) NO871670L (ko)
PT (1) PT84733B (ko)
TN (1) TNSN87058A1 (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325864A2 (en) * 1988-01-25 1989-08-02 General Motors Corporation Countergravity casting apparatus
EP0715915A1 (en) * 1994-12-06 1996-06-12 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1090227A (fr) * 1953-09-09 1955-03-29 Universal Castings Corp Perfectionnements aux appareils à mouler et leur procédé d'utilisation
FR1178083A (fr) * 1957-06-12 1959-05-04 Soralco Procédé de moulage des alliages de fonderie
FR2452986A1 (fr) * 1978-10-02 1980-10-31 Hitchiner Manufacturing Co Appareil pour la coulee de metal sous pression reduite dans un moule rigide autoportant et permeable aux gaz

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1090227A (fr) * 1953-09-09 1955-03-29 Universal Castings Corp Perfectionnements aux appareils à mouler et leur procédé d'utilisation
FR1178083A (fr) * 1957-06-12 1959-05-04 Soralco Procédé de moulage des alliages de fonderie
FR2452986A1 (fr) * 1978-10-02 1980-10-31 Hitchiner Manufacturing Co Appareil pour la coulee de metal sous pression reduite dans un moule rigide autoportant et permeable aux gaz

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325864A2 (en) * 1988-01-25 1989-08-02 General Motors Corporation Countergravity casting apparatus
EP0325864A3 (en) * 1988-01-25 1990-08-01 General Motors Corporation Countergravity casting apparatus
EP0715915A1 (en) * 1994-12-06 1996-06-12 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same
US5769147A (en) * 1994-12-06 1998-06-23 Showa Denko Kabushikikaisha Method for producing metallic ingot for plastic working
US5989365A (en) * 1994-12-06 1999-11-23 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working
EP1118402A1 (en) * 1994-12-06 2001-07-25 Showa Denko Kabushiki Kaisha Metallic ingot for plastic working and method for producing the same

Also Published As

Publication number Publication date
PT84733A (fr) 1987-05-01
DK202187A (da) 1987-10-24
FR2597770A1 (fr) 1987-10-30
IL82241A0 (en) 1987-10-30
IS3217A7 (is) 1987-09-21
TNSN87058A1 (fr) 1990-01-01
NO871670D0 (no) 1987-04-22
MA20950A1 (fr) 1987-12-31
JPS62254957A (ja) 1987-11-06
BR8701899A (pt) 1988-02-02
NO871670L (no) 1987-10-26
PT84733B (fr) 1989-06-05
FI871751A (fi) 1987-10-24
KR870009791A (ko) 1987-11-30
DK202187D0 (da) 1987-04-21
FI871751A0 (fi) 1987-04-22

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Inventor name: SANTARINI, MARC