EP0461052B1 - Procédé de moulage à mousse perdue et sous basse pression de pièces en alliage d'aluminium - Google Patents

Procédé de moulage à mousse perdue et sous basse pression de pièces en alliage d'aluminium Download PDF

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Publication number
EP0461052B1
EP0461052B1 EP91420178A EP91420178A EP0461052B1 EP 0461052 B1 EP0461052 B1 EP 0461052B1 EP 91420178 A EP91420178 A EP 91420178A EP 91420178 A EP91420178 A EP 91420178A EP 0461052 B1 EP0461052 B1 EP 0461052B1
Authority
EP
European Patent Office
Prior art keywords
mpa
pressure
aluminium
mould
aluminium alloy
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
EP91420178A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0461052A1 (fr
Inventor
Michel Garat
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
Priority claimed from FR909007736A external-priority patent/FR2662961B2/fr
Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP0461052A1 publication Critical patent/EP0461052A1/fr
Application granted granted Critical
Publication of EP0461052B1 publication Critical patent/EP0461052B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
    • B22D27/13—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of gas pressure

Definitions

  • the invention relates to a process for molding lost foam and under low pressure of metal parts made of aluminum alloy and constitutes an improvement of the process as described in French patent No. 2606688 filed on November 17, 1986.
  • this technique avoids the prior manufacture, by compacting and agglomeration of powdery refractory materials, of rigid molds associated in a more or less complicated way with cores and allows easy recovery of the molded parts as well as easy recycling of molding materials.
  • This operation can be done immediately after filling while the metal is still completely liquid, but it can still take place later as long as the fraction of solid dendrites formed during solidification in the mold does not exceed 40%, value beyond which the pressure has only a negligible effect.
  • the value of the pressure applied in this request is at most between 0.5 and 1.5 MPa.
  • the "skin" of the part is fragile much longer and the external pressure exerted by the application of the gas on the sand then pushes this skin towards the inside of the part, allowing a fraction of gas to infiltrate between the dendrites towards the recesses and thereby creating a so-called “spongy” recession which is as harmful as conventional recession to obtaining good mechanical properties.
  • the invention consists, as in French patent No. 2606688, of a lost foam molding process for metal parts, in particular aluminum alloy, in which a model of the product to be obtained is made, made of a foam of organic material in a mold consisting of a dry sand bath containing no bonding agent, then after filling the mold with the molten metal and before the solidified fraction of metal exceeds 40% by weight, an isostatic gas pressure is applied to the mold, but this invention is characterized in that it is mainly used in the molding of aluminum alloy parts having a solidification interval greater than 30 ° C. and whose geometry is such that the ratio R of the length which separates the counterweight from the critical zone (s) on half of the average thickness of the part over this length is greater than 10 and that the relative pressure applied is between 0.1 and 0.5 MPa.
  • the invention consists in applying the basic method to parts made of aluminum alloys having a relatively large solidification interval and having a particular geometry such that the ratio R is greater than 10, that is to say where the distance L between the region in which solidification occurs at the last moment and the counterweight is relatively large compared to the average thickness e of the part over this distance.
  • This ratio makes it possible to set the value of the maximum pressure that can be applied without risk of spongy recession: thus the higher the ratio, the lower the value of the pressure should be. It has been found that for a pressure of 0.5 MPa, the minimum value used in French patent No. 2606688, R is close to 10. Therefore when R is higher, it is necessary to use a pressure less than 0.5 MPa and which can go up to 0.1 MPa, value below which the pressure has only a negligible effect and can therefore be suppressed.
  • the invention is preferably applicable to alloys with a large solidification interval such as for example Al-Cu, Al-Cu-Mg, Al-Zn-Mg, Al-Si-Cu-Mg, as well as to Al- Si-Mg hypoeutectics whose silicon content is preferably less than or equal to 9% by weight.
  • the invention finds its application in particular in the manufacture of cylinder heads of automobile engines and of all parts requiring high mechanical characteristics.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Mold Materials And Core Materials (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Exhaust Silencers (AREA)
  • Saccharide Compounds (AREA)
  • Vending Machines For Individual Products (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Continuous Casting (AREA)
EP91420178A 1990-06-07 1991-06-05 Procédé de moulage à mousse perdue et sous basse pression de pièces en alliage d'aluminium Expired - Lifetime EP0461052B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR909007736A FR2662961B2 (fr) 1986-11-17 1990-06-07 Procede de moulage a mousse perdue et sous basse pression de pieces en alliage d'aluminium.
FR9007736 1990-06-07

Publications (2)

Publication Number Publication Date
EP0461052A1 EP0461052A1 (fr) 1991-12-11
EP0461052B1 true EP0461052B1 (fr) 1994-07-27

Family

ID=9397836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420178A Expired - Lifetime EP0461052B1 (fr) 1990-06-07 1991-06-05 Procédé de moulage à mousse perdue et sous basse pression de pièces en alliage d'aluminium

Country Status (22)

Country Link
US (1) US5161595A (ja)
EP (1) EP0461052B1 (ja)
JP (1) JPH0732947B2 (ja)
KR (1) KR920000413A (ja)
CN (1) CN1021304C (ja)
AT (1) ATE109046T1 (ja)
AU (1) AU632935B2 (ja)
BG (1) BG94584A (ja)
BR (1) BR9102233A (ja)
CA (1) CA2041682C (ja)
CS (1) CS173091A3 (ja)
DE (1) DE69103095T2 (ja)
ES (1) ES2056608T3 (ja)
FI (1) FI912724A (ja)
HU (1) HU208270B (ja)
IE (1) IE911935A1 (ja)
MX (1) MX171021B (ja)
NO (1) NO911985L (ja)
PL (1) PL290532A1 (ja)
PT (1) PT97874A (ja)
RU (1) RU1838042C (ja)
YU (1) YU47535B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104340A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Verfahren zur Herstellung von Mettalschaum und danach hergestellter Metallkörper
DE10104339A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Verfahren zur Herstellung von Metallschaum und danach hergestellter Metallkörper
US6874562B2 (en) 2001-06-07 2005-04-05 Goldschmidt Ag Process for producing metal/metal foam composite components
US6915834B2 (en) 2001-02-01 2005-07-12 Goldschmidt Ag Process for producing metal foam and metal body produced using this process

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5896912A (en) * 1995-04-27 1999-04-27 Hayes Wheels International, Inc. Method and apparatus for casting a vehicle wheel in a pressurized mold
DE19945547A1 (de) * 1999-09-23 2001-04-05 Albert Handtmann Metallguswerk Verfahren zum Vollformgießen mit nachfolgender Gasdruckbeaufschlagung
US6763876B1 (en) 2001-04-26 2004-07-20 Brunswick Corporation Method and apparatus for casting of metal articles using external pressure
US6883580B1 (en) 2003-01-27 2005-04-26 Brunswick Corporation Apparatus and improved method for lost foam casting of metal articles using external pressure
US7100669B1 (en) 2003-04-09 2006-09-05 Brunswick Corporation Aluminum-silicon casting alloy having refined primary silicon due to pressure
US7494554B1 (en) 2003-05-07 2009-02-24 Brunswick Corporation Method for continuous manufacturing of cast articles utilizing one or more fluidized beds for heat treating and aging purposes
US6957685B1 (en) * 2003-05-07 2005-10-25 Brunswick Corporation Method of cleaning and of heat treating lost foam castings
KR200445972Y1 (ko) * 2009-01-30 2009-09-14 서미수 손잡이 부착 종이컵
CN102380608A (zh) * 2010-08-30 2012-03-21 江苏金鑫电器有限公司 一种铝合金铸造方法
US11047032B2 (en) 2013-03-05 2021-06-29 Brunswick Corporation Method for solution heat treating with pressure
KR102324582B1 (ko) * 2020-08-12 2021-11-09 이홍석 굴 양식용 패각

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR887120A (fr) * 1941-11-19 1943-11-04 Silumin Ges M B H Procédé de moulage
DE2622552C3 (de) * 1976-05-20 1979-04-12 Vki-Rheinhold & Mahla Ag, 6800 Mannheim Formkasten zur Herstellung von Gußstücken
FR2606688B1 (fr) * 1986-11-17 1989-09-08 Pechiney Aluminium Procede de moulage a mousse perdue de pieces metalliques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104340A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Verfahren zur Herstellung von Mettalschaum und danach hergestellter Metallkörper
DE10104339A1 (de) * 2001-02-01 2002-08-08 Goldschmidt Ag Th Verfahren zur Herstellung von Metallschaum und danach hergestellter Metallkörper
US6915834B2 (en) 2001-02-01 2005-07-12 Goldschmidt Ag Process for producing metal foam and metal body produced using this process
US6874562B2 (en) 2001-06-07 2005-04-05 Goldschmidt Ag Process for producing metal/metal foam composite components

Also Published As

Publication number Publication date
HU208270B (en) 1993-09-28
BG94584A (bg) 1993-12-24
MX171021B (es) 1993-09-24
CA2041682A1 (fr) 1991-12-08
RU1838042C (ru) 1993-08-30
JPH04251633A (ja) 1992-09-08
KR920000413A (ko) 1992-01-29
EP0461052A1 (fr) 1991-12-11
CA2041682C (fr) 1996-01-16
YU47535B (sh) 1995-10-03
CS173091A3 (en) 1992-02-19
HUT57108A (en) 1991-11-28
ES2056608T3 (es) 1994-10-01
FI912724A (fi) 1991-12-08
YU99691A (sh) 1994-06-10
FI912724A0 (fi) 1991-06-06
BR9102233A (pt) 1992-01-07
CN1057981A (zh) 1992-01-22
CN1021304C (zh) 1993-06-23
AU7607391A (en) 1991-12-12
PL290532A1 (en) 1991-12-16
PT97874A (pt) 1993-08-31
NO911985L (no) 1991-12-09
NO911985D0 (no) 1991-05-23
DE69103095T2 (de) 1994-11-17
AU632935B2 (en) 1993-01-14
US5161595A (en) 1992-11-10
IE911935A1 (en) 1991-12-18
ATE109046T1 (de) 1994-08-15
DE69103095D1 (de) 1994-09-01
JPH0732947B2 (ja) 1995-04-12

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