WO2006024148A1 - Appareil et procédé pour fabriquer un émail métallique semi-solide - Google Patents

Appareil et procédé pour fabriquer un émail métallique semi-solide Download PDF

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Publication number
WO2006024148A1
WO2006024148A1 PCT/CA2005/001310 CA2005001310W WO2006024148A1 WO 2006024148 A1 WO2006024148 A1 WO 2006024148A1 CA 2005001310 W CA2005001310 W CA 2005001310W WO 2006024148 A1 WO2006024148 A1 WO 2006024148A1
Authority
WO
WIPO (PCT)
Prior art keywords
crucible
side wall
closing plate
lower edge
semi
Prior art date
Application number
PCT/CA2005/001310
Other languages
English (en)
Inventor
Joseph Langlais
Pascal COTÉ
Roger Pelletier
Don Allen Doutre
Original Assignee
Alcan International Limited
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 Alcan International Limited filed Critical Alcan International Limited
Priority to CA002576742A priority Critical patent/CA2576742A1/fr
Priority to EP05778814A priority patent/EP1789221A4/fr
Priority to JP2007528538A priority patent/JP2008511443A/ja
Publication of WO2006024148A1 publication Critical patent/WO2006024148A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase

Definitions

  • the present invention relates to the casting of semi-solid slurries of molten metal, particularly aluminum and aluminum alloys. More particularly, it relates to apparatus for preparing semi-solid slurries and use of a "slurry on demand" method of preparing such slurries.
  • a crucible for preparing semi-solid metallic slurry, having a liquid phase and a solids phase.
  • the crucible comprises a side wall having a lower edge, a closing plate engagable against and separable from the lower edge of the side wall and clamping means for holding the closing plate against the lower edge of the side wall.
  • a method of preparing semi-solids slurry having a liquid phase and a solids phase.
  • the method comprises providing a crucible having a side wall with a lower edge and a closing plate, holding the closing plate in contact with the lower edge of the side wall, filling the crucible with a molten metal, cooling the molten metal to produce a semi-solid slurry, releasing the lower edge of the side wall from contact with the closing plate and finally, transferring the semi-solid slurry from the side wall to a casting machine.
  • Fig. 1 is a vertical cross-sectional view of an embodiment of the present invention, illustrating the side wall and closing plate of the crucible;
  • Fig. 2 is a detail of Fig. 1; showing the hole and plug in a plugged arrangement; and Fig. 3 is a vertical cross-sectional view of the support plate and closing plate, showing a preferred means of cleaning the hole.
  • a crucible 1 is shown that is designed to receive molten metal to be cooled into a semi-solid metallic slurry.
  • the crucible 1 is formed from a side wall in the form of an open ended tube 2, which rests on a closing plate 3. Any convenient cross-sectional shape may be used, but a generally cylindrical shape is particularly preferred.
  • the tube 2 is held in contact against the closing plate 3 to form a seal between a lower edge 4 of the tube 2 and a surface of the closing plate 3.
  • the tube 2 is preferably slightly tapered, more preferably typically with less than about 5 degrees of taper and most preferably about 1 degree of taper.
  • the taper may be in either direction but most preferably having a larger diameter at the lower edge 4, which contacts the closing plate 3.
  • the closing plate 3 in turn can be mounted on a larger support plate 5 that forms part of a support for the crucible 1.
  • Pressure between the tube 2 and the closing plate 3 can be maintained by a number of means well known in the art, including the use of a clamping device 14.
  • the clamping device 14 is in the form of a horseshoe style clamp that is connected to the support plate 5 and which can be remotely actuated to rotate onto and clamp down on a flange 6 that runs around the tube 2, above the lower edge 4.
  • Actuation for the clamp can be pneumatic or hydraulic.
  • the support plate 5 can be remotely controlled to move in a swirling motion to thereby agitate the crucible and enhance cooling of the molten metal in forming the semi-solid slurry.
  • the closing plate 3 may be manufactured from refractory materials, and particularly from alumina-silicate refractory boards such as N-17TM refractory board produced by Pyrotek Inc., or can be a metal, such as steel, stainless steel or titanium.
  • the metal tube 2 may be manufactured from a refractory material or metal as well, and is preferably made from steel or stainless steel.
  • material for the tube 2 and tube thickness and the material and dimensions of the closing plate 3 are chosen based on predetermined heat capacity and mass requirements for cooling the molten metal into the desired semi-solid slurry consistency. However, it is also possible to use a tube and closing plate with less precisely determined properties, together with an external heating or cooling system.
  • Any metallic surfaces of either the closing plate 3 or the tube 2 are preferably coated with suitable metal resistant coatings.
  • suitable metal resistant coatings are well known in the art and, in the case of aluminum alloys, can include mica wash and boron nitride. Any other operable refractory based coatings and coating methods may be used, including coatings applied as wash coats, spray coats or coatings applied by plasma spraying.
  • the closing plate 3 and the support plate 5 preferably contain at least one hole 10 running through them.
  • the hole 10 is preferably tapered, having a smaller diameter adjacent the lower edge 4 of the tube 2 and widening therefrom.
  • the hole 10 has a preferred diameter of from about 3 to about 5 millimeters. In cases where the hole is tapered, the smaller diameter is from about 3 to about 5 millimeters. The particular diameter used is dependent on the alloy cast and size of slurry charge to be prepared.
  • the closing plate 3 can preferably have an upwards conical profile, to enhance draining of liquid metal from the hole 10.
  • a plug 11 fits within the hole 10 from an underside of the supporting plate 5.
  • the plug 11 is optionally mounted on a pivoting cantilever arm 12 that allows for manipulation of the plug 11 in and out of the hole 10.
  • the pivoting cantilever arm 12 can be remotely actuated to plug or unplug the hole 10, and can be either pneumatically or hydraulically actuated.
  • the plug 11 can be made from any suitable material known in the art to be resistant to the molten metal, and is preferably made of boron nitride.
  • the tube 2 is first cooled to a predetermined temperature to aid in cooling the molten metal into a semi-solid slurry.
  • the tube 2 can be cooled to a temperature ranging from room temperature up to 100 - 15O 0 C.
  • the plug 11 is inserted in the hole 10 in the closing plate 3 and the tube 2 is clamped to the closing plate 3 by the clamping device 14.
  • Molten metal typically having a temperature greater than 700 0 C, is poured into the crucible 1 , where it is agitated by movement of the support plate 5 and cools to form a semi-solid slurry.
  • the semi-solid slurry comprises a liquid phase and a solids phase.
  • a cooling process such as that taught in US Patent no. 6,428,636 is particularly preferred for this purpose.
  • the plug 11 is removed from the hole 10 by pivoting the pivoting cantilever arm 12 and some of the liquid phase is allowed to flow out through the hole 10.
  • the fraction of solids phase in the slurry is increased, typically, from about 35 - 40wt% to about 45 - 55wt%.
  • the semi-solid structure and thixotropic behaviour of the slurry within the crucible 1 prevents the solid phase from escaping and only liquid phase is removed.
  • it is desirable to drain off some of the liquid phase so that the semi-solid slurry in the crucible 1 becomes detached from the tube 2 of the crucible 1 , thereby easing transfer of the slurry to a casting machine.
  • the clamping device 14 is released from the tube 2 and the tube 2 containing the semi-solid mass is transferred to a shot sleeve of a conventional die casting machine for forming and solidifying the slurry.
  • the semi-solid slurry leaves the tube 2 through its lower edge 4.
  • the tube can be transferred using any known means in the art, for example, using a remotely controlled robot (not shown).
  • the hole 10 in the closing plate 3 can be cleaned of any molten metal that would otherwise build up and obstruct the hole 10. Because there is no filter element of similar device required in the hole 10, there is little surface area for molten metal to accumulate and the removal of any small residue is quickly accomplished.
  • the hole 10 can preferably cleaned by a simple burst of compressed from an air jet 8.
  • the hole 10 and the closing plate 3 are then ready to be clamped to the tube 2 for formation a next batch of semi ⁇ solid slurry.
  • the air jet 8 can optionally be remotely moved into position under the hole 10 and can be remotely actuated to deliver a burst of compressed air. Actuation of the air jet 8 can be pneumatic or hydraulic.
  • a rotating air jet may also preferably be used to blow away any molten metal droplets that may still adhere to the tube after the semi-solid slurry has been transferred to the casting machine.
  • each of the steps for clamping the support plate 5 to the tube 2, agitating the support plate 5, unclamping the tube 2 from the support plate 5, transferring the slurry to the casting mould, cleaning the hole 10 in the closing plate 3 and re-clamping the tube 2 to the support plate 5 can be timed, automated and remotely controlled. Because of the particular design features, the crucible 1 , in particular when used in the preferred manner, remains free of significant metal residues and can be continuously reused without stopping on each casting cycle for mechanical cleaning and recoating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

L'invention a trait à un creuset permettant de préparer un émail métallique semi-solide, passant par une phase liquide et une phase solide. Le creuset présente une paroi latérale disposant d'un bord inférieur, un plateau de fermeture pouvant s'engager contre le bord inférieur de la paroi latérale et s'en séparer et un moyen de serrage permettant de maintenir le plateau de fermeture contre le bord inférieur de la paroi latérale. Il est également enseigné un procédé de préparation d'un émail semi-solide. Le procédé implique d'apporter un creuset disposant d'une paroi latérale avec un bord inférieur et un plateau de fermeture et de maintenir le plateau de fermeture en contact avec le bord inférieur de la paroi latérale. Le creuset est ensuite rempli d'un métal fondu, lequel est refroidi pour produire un émail semi-solide. Enfin, le bord inférieur de la paroi latérale est libéré du contact avec le plateau de fermeture et l'émail semi-solide est transféré de la paroi latérale à une machine de moulage.
PCT/CA2005/001310 2004-08-30 2005-08-30 Appareil et procédé pour fabriquer un émail métallique semi-solide WO2006024148A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002576742A CA2576742A1 (fr) 2004-08-30 2005-08-30 Appareil et procede pour fabriquer un pate metallique semi-solide
EP05778814A EP1789221A4 (fr) 2004-08-30 2005-08-30 Appareil et procédé pour fabriquer un émail métallique semi-solide
JP2007528538A JP2008511443A (ja) 2004-08-30 2005-08-30 半凝固金属スラリーの製造装置および製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60558604P 2004-08-30 2004-08-30
US60/605,586 2004-08-30

Publications (1)

Publication Number Publication Date
WO2006024148A1 true WO2006024148A1 (fr) 2006-03-09

Family

ID=35999671

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2005/001310 WO2006024148A1 (fr) 2004-08-30 2005-08-30 Appareil et procédé pour fabriquer un émail métallique semi-solide

Country Status (6)

Country Link
EP (1) EP1789221A4 (fr)
JP (1) JP2008511443A (fr)
KR (1) KR20070049233A (fr)
CN (1) CN101010159A (fr)
CA (1) CA2576742A1 (fr)
WO (1) WO2006024148A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2535126A1 (fr) * 2011-06-16 2012-12-19 Cie Automotive, S.A. Dispositif et procédé pour obtenir des boues semi-solides
US9586261B2 (en) 2012-06-12 2017-03-07 Toshiba Kikai Kabushiki Kaisha Apparatus for producing semi-solidified metal, method for producing semi-solidified metal, and semi-solidified metal

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009030049A1 (fr) * 2007-09-06 2009-03-12 Alcan International Limited Revêtement pour des surfaces métallurgiques
JP5956838B2 (ja) * 2012-06-12 2016-07-27 東芝機械株式会社 半凝固金属の製造装置及び製造方法
JP5459812B1 (ja) * 2013-05-09 2014-04-02 東芝機械株式会社 半凝固金属生成容器の冷却装置、半凝固金属の製造装置、半凝固金属の製造方法及び半凝固金属を用いた成形方法
US20200047243A1 (en) * 2016-11-01 2020-02-13 Shiloh Industries, Inc. Composite part with external part cast around internal insert and method for producing the same
JP7191605B2 (ja) * 2018-09-13 2022-12-19 芝浦機械株式会社 スラリー生成装置およびスラリー生成システム
DE102020007286B4 (de) 2020-11-30 2023-05-04 VDEh-Betriebsforschungsinstitut Gesellschaft mit beschränkter Haftung Spannrollensatz für eine Richtanlage zum Richten eines Bandes, Richtanlage, Nachwalzgerüstanlage und Verfahren zum Betreiben einer Richtanlage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681836B1 (en) * 1998-01-20 2004-01-27 Honda Giken Kogyo Kabushiki Kaisha Method and apparatus for manufacturing semi-solidified metal
US6796362B2 (en) * 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231316A1 (de) * 1982-08-23 1984-04-12 Leybold-Heraeus GmbH, 5000 Köln Verfahren und vorrichtung zur steuerung des abgiessens einer schmelze aus einem schmelzenbehaelter mit einer bodenoeffnung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681836B1 (en) * 1998-01-20 2004-01-27 Honda Giken Kogyo Kabushiki Kaisha Method and apparatus for manufacturing semi-solidified metal
US6796362B2 (en) * 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1789221A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2535126A1 (fr) * 2011-06-16 2012-12-19 Cie Automotive, S.A. Dispositif et procédé pour obtenir des boues semi-solides
US9586261B2 (en) 2012-06-12 2017-03-07 Toshiba Kikai Kabushiki Kaisha Apparatus for producing semi-solidified metal, method for producing semi-solidified metal, and semi-solidified metal

Also Published As

Publication number Publication date
JP2008511443A (ja) 2008-04-17
EP1789221A4 (fr) 2008-10-22
KR20070049233A (ko) 2007-05-10
EP1789221A1 (fr) 2007-05-30
CN101010159A (zh) 2007-08-01
CA2576742A1 (fr) 2006-03-09

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