EP0274964B1 - Lost foam casting process for metal pieces - Google Patents

Lost foam casting process for metal pieces Download PDF

Info

Publication number
EP0274964B1
EP0274964B1 EP87420309A EP87420309A EP0274964B1 EP 0274964 B1 EP0274964 B1 EP 0274964B1 EP 87420309 A EP87420309 A EP 87420309A EP 87420309 A EP87420309 A EP 87420309A EP 0274964 B1 EP0274964 B1 EP 0274964B1
Authority
EP
European Patent Office
Prior art keywords
mould
metal
pressure
lost foam
casting process
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
EP87420309A
Other languages
German (de)
French (fr)
Other versions
EP0274964A1 (en
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
Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP0274964A1 publication Critical patent/EP0274964A1/en
Application granted granted Critical
Publication of EP0274964B1 publication Critical patent/EP0274964B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 present invention relates to a lost foam molding process for metal parts, in particular aluminum and its alloys according to the preamble of claim 1.
  • the invention therefore consists, after filling the mold with the molten metal, that is to say when the model has been completely destroyed by the metal and the vapors emitted have been evacuated, for example by using placing the mold under vacuum, and while the quantity of liquid is still slightly greater than the quantity of solid formed, putting the whole of the mold and the part under increasing isostatic pressure and not applying the chosen pressure directly.
  • pressure is applied before solidification begins, that is, while the metal is still completely in the liquid state.
  • This operation can be carried out using a sealed box in which the mold has been placed, said box being fitted with one or more pipes suitably distributed over its surface and connected to a source of pressurized gas.
  • This box can moreover be used for the evacuation of the combustion vapors of the model by connection with a vacuum pump.
  • the pressure necessary for the invention must preferably be between 0.5 and 1.5 MPa, since, for most parts, outside this range either the pressure is insufficient, or it is superfluous.
  • the pressurization must be carried out as quickly as possible to avoid any development of solidification and preferably the maximum value applied must be reached in less than 15 seconds.
  • the parts obtained are free from pitting and porosity following microretassuring.
  • Cylindrical hollow bodies with an external diameter of 45 mm, a wall thickness of 4 mm, comprising adjacent ribs and bosses of 20 ⁇ 20 ⁇ 80 mm were molded according to the method of the invention, that is to say that applied inside the enclosure containing the mold and just before solidification begins, an isostatic gas pressure steadily increasing from atmospheric pressure to 1 MPa in 10 seconds.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Moulding By Coating Moulds (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Continuous Casting (AREA)
  • Mold Materials And Core Materials (AREA)
  • Pyridine Compounds (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Laminated Bodies (AREA)

Abstract

1. A lost foam casting process for the casting of metal objects, in particular of aluminium and its alloys, in which a pattern of the product to be obtained which is produced from a foam of organic material is immersed into a mould constituted by a bath of dry sand containing no binder, characterised in that an isostatic gas pressure is applied by a gradual increase to the selected value to the mould after ? the mould has been filled with the molten metal and before the solidified fraction of metal exceeds 40 percent by weight.

Description

La présente invention est relative à un procédé de moulage à mousse perdue de pièces métalliques, notamment en aluminium et en ses alliages selon le préambule de la revendication 1.The present invention relates to a lost foam molding process for metal parts, in particular aluminum and its alloys according to the preamble of claim 1.

Il est connu de l'homme de l'art, principalement par l'enseignement de l'USP n° 3 157 924, d'utiliser pour le moulage des modèles en mousse de polystyrène plongés dans un moule constitué par du sable sec ne contenant aucun agent de liaison. Dans un tel procédé, le métal à mouler, qui a été préalablement fondu, est amené par l'intermédiaire de canaux traversant le sable au contact du modèle et se substitue progressivement à ce dernier en le brûlant et en le transformant en vapeurs qui s'échappent entre les grains de sable. Cette technique s'est avérée séduisante à l'échelle industrielle, parce qu'elle évite la fabrication préalable, par compactage et agglomération de matériaux réfractaires pulvérulents, de moules rigides associés de façon plus ou moins compliquée à des noyaux par l'intermédiaire de canaux, et qu'elle permet une récupération facile des pièces moulées ainsi qu'un recyclage aisé des matériaux de moulage.It is known to those skilled in the art, principally by the teaching of USP No. 3,157,924, to use for molding polystyrene foam models immersed in a mold formed by dry sand containing no liaison officer. In such a process, the metal to be molded, which has been previously melted, is brought through channels passing through the sand in contact with the model and gradually replaces the latter by burning it and transforming it into vapors which escape between the grains of sand. This technique has proven to be attractive on an industrial scale, because it 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 via channels. , and that it allows easy recovery of the molded parts as well as easy recycling of the molding materials.

Cependant, cette technique est handicapée par deux facteurs:

  • - la relative lenteur de la solidification qui favorise la formation de piqûres de gazage
  • - la relative faiblesse des gradients thermiques qui peut causer une microretassure si le tracé de la pièce en rend le masselottage difficile.
However, this technique is handicapped by two factors:
  • - the relative slowness of solidification which favors the formation of gassing pits
  • - the relative weakness of the thermal gradients which can cause micro-back-up if the layout of the part makes its weighting difficult.

Il est connu par le document FR-A 887 120 d'appliquer une pression sur un moule pour accélérer la solidification des pièces.It is known from document FR-A 887 120 to apply pressure to a mold to accelerate the solidification of the parts.

Toutefois, il s'agit de moules classiques à parois rigides ayant une résistance mécanique suffisante pour supporter ladite pression. Dans le cas de l'invention, lorsqu'on applique la pression de gaz sur le moule rempli de métal fondu, les grains de sable provoquent une perte de charge plus importante que le métal, de sorte qu'il en résulte un des équilibre transitoire de pression qui occasionne une poussée du métal à travers lesdits grains et une déformation de la pièce, phénomène qu'on désigne sous le nom d "abreuvage ".However, these are conventional molds with rigid walls having sufficient mechanical strength to withstand said pressure. In the case of the invention, when the gas pressure is applied to the mold filled with molten metal, the grains of sand cause a greater pressure drop than the metal, so that this results in a transient equilibrium pressure which causes a push of the metal through said grains and a deformation of the part, a phenomenon which is designated by the name of "watering".

C'est dans le but d'éviter cet inconvénient que la demanderesse a mis au point un procédé de moulage à mousse perdue, caractérisé en ce qu'après avoir rempli le moule avec le métal fondu et avant que la fraction solidifiée de métal dépasse 40% en poids, on applique sur le métal une pression gazeuse isostatique qui croît dans le temps jusqu'à une valeur choisie.It is in order to avoid this drawback that the Applicant has developed a lost foam molding process, characterized in that after having filled 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 metal which increases over time to a chosen value.

L'invention consiste donc, après avoir rempli le moule avec le métal fondu, c'est-à-dire quand le modèle a été détruit complétement par le métal et que les vapeurs émises ont été évacuées, en s'aidant par exemple d'une mise sous dépression du moule, et alors que la quantité de liquide est encore légèrement supérieure à la quantité de solide formé, à mettre l'ensemble du moule et de la pièce sous une pression isostatique croissante et non à appliquer directement la pression choisie. Cependant, de préférence, la pression est appliquée avant que la solidification s'amorce, c'est-à-dire alors que le métal est encore complètement à l'état liquide. Cette opération peut être réalisée à l'aide d'un caisson étanche dans lequel a été placé le moule, ledit caisson étant équipé d'une ou plusieurs tubulures réparties convenablement sur sa surface et reliée à une source de gaz sous pression. Ce caisson peut d'ailleurs servir à l'évacuation des vapeurs de combustion du modèle par mise en liaison avec une pompe à vide.The invention therefore consists, after filling the mold with the molten metal, that is to say when the model has been completely destroyed by the metal and the vapors emitted have been evacuated, for example by using placing the mold under vacuum, and while the quantity of liquid is still slightly greater than the quantity of solid formed, putting the whole of the mold and the part under increasing isostatic pressure and not applying the chosen pressure directly. Preferably, however, pressure is applied before solidification begins, that is, while the metal is still completely in the liquid state. This operation can be carried out using a sealed box in which the mold has been placed, said box being fitted with one or more pipes suitably distributed over its surface and connected to a source of pressurized gas. This box can moreover be used for the evacuation of the combustion vapors of the model by connection with a vacuum pump.

La pression nécessaire à l'invention doit être de préférence comprise entre 0, 5 et 1, 5 MPa, car, pour la plupart des pièces, à l'extérieur de cette fourchette soit la pression est insuffisante, soit elle est superflue. La mise sous pression doit être effectuée le plus rapidement possible pour éviter tout développement de la solidification et de préférence la valeur maximum appliquée doit être atteinte en moins de 15 secondes.The pressure necessary for the invention must preferably be between 0.5 and 1.5 MPa, since, for most parts, outside this range either the pressure is insufficient, or it is superfluous. The pressurization must be carried out as quickly as possible to avoid any development of solidification and preferably the maximum value applied must be reached in less than 15 seconds.

Dans ces conditions, les pièces obtenues sont exemptes de piqûres et de porosité consécutives à une microretassure.Under these conditions, the parts obtained are free from pitting and porosity following microretassuring.

Il en résulte une augmentation de la compacité qui se traduit par une amélioration des caractéristiques mécaniques, notamment au niveau de la résistance.This results in an increase in compactness which results in an improvement in the mechanical characteristics, in particular in terms of resistance.

L'invention peut être illustrée à l'aide de l'exemple d'application suivant:The invention can be illustrated using the following example of application:

Des corps creux cylindriques de diamètre extérieur 45 mm, d'épaisseur de paroi 4 mm, comportant des nervures adjacentes et des bossages de 20x20x80 mm ont été moulés suivant le procédé de l'invention, c'est-à-dire qu'on a appliqué à l'intérieur de l'enceinte contenant le moule et juste avant que la solidification s'amorce, une pression de gaz isostatique croissant régulièrement de la pression atmosphérique à 1 MPa en 10 secondes.Cylindrical hollow bodies with an external diameter of 45 mm, a wall thickness of 4 mm, comprising adjacent ribs and bosses of 20 × 20 × 80 mm were molded according to the method of the invention, that is to say that applied inside the enclosure containing the mold and just before solidification begins, an isostatic gas pressure steadily increasing from atmospheric pressure to 1 MPa in 10 seconds.

Ces corps ont été réalisés à partir de deux types d'alliages à hautes caractéristiques mécaniques:

  • - l'A-S7G03 de composition en poids % Fe0,20; Si6,5-7,5; Cu0,10; Zn0,10; Mg0,25-0,40; Mn0,10; Ni0,05; Pb0,05; Sn0,05; TiO,05-0,20,alliage modifié au sodium;
  • - LA-U5GT de composition: Fe0,35; Si0,20; Cu4,20-5,00; Zn0,10; Mg0,15-0,35; Mn0,10; Ni0,05; Pb0,05; SnO,05;TiO,05-0,30.
These bodies were made from two types of alloys with high mechanical characteristics:
  • - A-S7G03 of composition by weight% Fe0.20; Si 6.5-7.5; Cu0.10; Zn0.10; Mg0.25-0.40; Mn0.10; Ni0.05; Pb0.05; Sn0.05; TiO, 05-0.20, sodium modified alloy;
  • - LA-U5GT of composition: Fe0.35; Si0.20; Cu 4.20-5.00; Zn0.10; Mg 0.15-0.35; Mn0.10; Ni0.05; Pb0.05; SnO, 05; TiO, 05-0.30.

Les essais mécaniques effectués sur lesdits corps après des traitements thermiques normalisés Y23 pour l'A-S7G03 et Y24 pour l'A-U5GT ont permis de mesurer les caractéristiques suivantes:

  • - Dans l'A-S7G03, l'indice de qualité Q en MPa qui correspond à la formule Q = R + 150 log A où R est la résistance en MPa et A l'allongement en % et ce, à la fois sur les zones épaisses et minces des pièces.
  • - Dans l'AU5GT, les limites élastiques LE en MPa, la résistance R en MPa et l'allongement A en % et ce, également à la fois sur les zones épaisses et minces.
Mechanical tests carried out on said bodies after standardized heat treatments Y23 for the A-S7G03 and Y24 for the A-U5GT made it possible to measure the following characteristics:
  • - In A-S7G03, the quality index Q in MPa which corresponds to the formula Q = R + 150 log A where R is the resistance in MPa and A the elongation in% and this, both on the thick and thin areas of parts.
  • - In the AU5GT, the elastic limits LE in MPa, the resistance R in MPa and the elongation A in% and this, also on both thick and thin areas.

Les résultats figurent dans le tableau suivant :

Figure imgb0001
The results are shown in the following table:
Figure imgb0001

On constate donc une amélioration des caractéristiques mécaniques résultant directement de l'augmentation de la compacité.There is therefore an improvement in the mechanical characteristics resulting directly from the increase in compactness.

Claims (4)

1. A lost foam casting process for the casting of metal objects, in particular of aluminium and its alloys, in which a pattern of the product to be obtained which is produced from a foam of organic material is immersed into a mould constituted by a bath of dry sand containing no binder, characterised in that an isostatic gas pressure is applied by a gradual increase to the selected value to the mould after? the mould has been filled with the molten metal and before the solidified fraction of metal exceeds 40 percent by weight.
2. A process according to Claim 1, characterised in that a gas pressure is applied before solidification commences.
3. A process according to Claim 1, characterised in that the pressure is between 0.5 and 1.5 MPa.
4. A process according to Claim 1, characterised in that the pressure is attained in less than 15 seconds.
EP87420309A 1986-11-17 1987-11-16 Lost foam casting process for metal pieces Expired - Lifetime EP0274964B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616415 1986-11-17
FR8616415A FR2606688B1 (en) 1986-11-17 1986-11-17 LOSS FOAM MOLDING PROCESS FOR METAL PARTS

Publications (2)

Publication Number Publication Date
EP0274964A1 EP0274964A1 (en) 1988-07-20
EP0274964B1 true EP0274964B1 (en) 1990-05-30

Family

ID=9341190

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420309A Expired - Lifetime EP0274964B1 (en) 1986-11-17 1987-11-16 Lost foam casting process for metal pieces

Country Status (21)

Country Link
US (1) US5058653A (en)
EP (1) EP0274964B1 (en)
JP (1) JPH0669608B2 (en)
KR (1) KR910001179B1 (en)
AT (1) ATE53180T1 (en)
AU (1) AU592905B2 (en)
BR (1) BR8706146A (en)
CA (1) CA1322098C (en)
DE (1) DE3762952D1 (en)
DK (1) DK600287A (en)
ES (1) ES2015320B3 (en)
FI (1) FI875060A (en)
FR (1) FR2606688B1 (en)
GR (1) GR3001011T3 (en)
IE (1) IE59096B1 (en)
IS (1) IS1521B (en)
MX (1) MX168448B (en)
NO (1) NO167715C (en)
PT (1) PT86142B (en)
SU (1) SU1757448A3 (en)
UA (1) UA5993A1 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014764A (en) * 1986-11-17 1991-05-14 Aluminium Pechiney Lost-foam casting of aluminum under pressure
FR2651453B2 (en) * 1989-09-07 1994-03-25 Pechiney Aluminium IMPROVEMENT IN THE LOST FOAM AND PRESSURE MOLDING PROCESS OF METAL PARTS.
FR2644087B2 (en) * 1986-11-17 1991-05-03 Pechiney Aluminium IMPROVEMENT IN THE LOSS FOAM MOLDING PROCESS OF METAL PARTS
FR2653692B2 (en) * 1986-11-17 1992-01-03 Ney Aluminium IMPROVEMENT IN THE LOST FOAM AND CONTROLLED PRESSURE MOLDING PROCESS OF METAL PARTS.
FR2662961B2 (en) * 1986-11-17 1992-07-31 Pechiney Aluminium LOST FOAM AND LOW PRESSURE MOLDING PROCESS FOR PARTS OF ALUMINUM ALLOY.
US4724889A (en) * 1987-04-27 1988-02-16 Ford Motor Company Degating technique for clustered castings made by ECP
ATE81044T1 (en) * 1989-03-07 1992-10-15 Pechiney Aluminium PROCESS FOR FULL MOLD CASTING OF METALLIC OBJECTS UNDER PRESSURE.
US5088544A (en) * 1989-10-31 1992-02-18 Aluminium Pechiney Process for the lost-foam casting, under controlled pressure, of metal articles
US5161595A (en) * 1990-06-07 1992-11-10 Aluminium Pechiney Process for the lost foam casting, under low pressure, of aluminium alloy articles
US5295530A (en) * 1992-02-18 1994-03-22 General Motors Corporation Single-cast, high-temperature, thin wall structures and methods of making the same
FR2688720B1 (en) * 1992-03-17 1994-06-17 Pont A Mousson LOST MODEL MOLDING PROCESS AND INSTALLATION AND USE OF THE INSTALLATION.
DE4210005A1 (en) * 1992-03-27 1993-09-30 Shera Werkstofftechnologie Gmb Material for the production of molds for cast workpieces made of titanium and other aggressive metal melts
DE4210004A1 (en) * 1992-03-27 1993-09-30 Joachim Pajenkamp Process and ceramic casting mold for the production of dental casting workpieces made of titanium and ceramicizable composition for the production of a ceramic casting mold for the production of dental casting workpieces made of titanium
AT406837B (en) * 1994-02-10 2000-09-25 Electrovac METHOD AND DEVICE FOR PRODUCING METAL-MATRIX COMPOSITES
US5524696A (en) * 1994-08-05 1996-06-11 General Motors Corporation Method of making a casting having an embedded preform
US6453979B1 (en) 1998-05-14 2002-09-24 Howmet Research Corporation Investment casting using melt reservoir loop
US6019158A (en) * 1998-05-14 2000-02-01 Howmet Research Corporation Investment casting using pour cup reservoir with inverted melt feed gate
US6070644A (en) * 1998-05-14 2000-06-06 Howmet Research Corporation Investment casting using pressure cap sealable on gas permeable investment mold
US6640877B2 (en) 1998-05-14 2003-11-04 Howmet Research Corporation Investment casting with improved melt filling
DE19939828C1 (en) * 1999-08-21 2000-11-02 Albert Handtmann Metallguswerk Foamed foundry pattern, especially a lost pattern tree for aluminum casting, is produced by adhesive bonding or welding of a frangible separation element between foamed runner and ingate components
DE19945547A1 (en) * 1999-09-23 2001-04-05 Albert Handtmann Metallguswerk Process for full mold casting comprises directly applying gas pressure while filling a casting funnel/casting basin with liquid metal and closing the casting container
US6969417B2 (en) * 2000-06-19 2005-11-29 Hydrogen Energy America, Llc Catalytic alloy for the dissociation of water into hydrogen and oxygen and method of making
ITTO20010287A1 (en) 2001-03-27 2002-09-27 Teksid Spa CASTING EQUIPMENT FOR THE PRODUCTION OF METALLIC CASTINGS USING "LOST-FOAM" TECHNOLOGY.
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
CN102380608A (en) * 2010-08-30 2012-03-21 江苏金鑫电器有限公司 Aluminum alloy casting method
CN101934351B (en) * 2010-10-19 2012-04-25 湘潭高耐合金制造有限公司 Process for manufacturing oil pressure water tank of concrete delivery pump
CN102198488A (en) * 2011-04-19 2011-09-28 滁州金诺实业有限公司 Method for manufacturing casting blank of refrigerator inner container die by using lost foam casting process
CN102343417A (en) * 2011-09-19 2012-02-08 滁州金诺实业有限公司 Water channel pre-filling method used during lost foam casting of engine cylinder body
CN102806312A (en) * 2012-08-30 2012-12-05 贵州安吉航空精密铸造有限责任公司 Production method of aluminum alloy casting
CN102873308A (en) * 2012-10-09 2013-01-16 西安交通大学 Method for lost foam casting of composite two-liquor bimetallic hammerhead of crusher
CN103894545A (en) * 2012-12-26 2014-07-02 龙工（福建）铸锻有限公司 Lost foam casting technology of casting with flat, inflected, and deep blind hole
US11047032B2 (en) 2013-03-05 2021-06-29 Brunswick Corporation Method for solution heat treating with pressure
CN103567385A (en) * 2013-11-20 2014-02-12 江苏江旭铸造集团有限公司 Hardening agent for lost foam casting
CN103962505B (en) * 2014-05-15 2016-01-20 河北钢铁股份有限公司唐山分公司 A kind of vacuum negative pressure cast technique that can ensure collars castability
CN104338900B (en) * 2014-10-21 2016-05-04 河北瑞欧消失模科技有限公司 The electric control method of separate type Lost Form Casting Production Line
CN104353781A (en) * 2014-10-27 2015-02-18 无锡乐华自动化科技有限公司 Lost foam casting process of low-alloy cast steel wheel for port machinery
US20160158837A1 (en) * 2014-12-06 2016-06-09 Soliden, LLC Sand casting device and associated method with improved mechanical properties
CN104525847A (en) * 2014-12-22 2015-04-22 南京优耐特精密机械制造有限公司 Shell hardening agent
CN105344940B (en) * 2015-12-07 2017-12-05 兴化市雅兰机械制造有限公司 Motor casing lost foam casting process
CN106077483A (en) * 2016-08-08 2016-11-09 安徽兴达动力机械有限公司 A kind of multi-cylinder diesel engine cylinder body casting mould and casting technique thereof
CN106734879B (en) * 2016-12-12 2018-12-04 重庆理工大学 A kind of lost foam casting moulding process of waste incineration reciprocating grate bar

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1846913A (en) * 1929-05-06 1932-02-23 Max S Shapiro Dental casting apparatus
FR887120A (en) * 1941-11-19 1943-11-04 Silumin Ges M B H Molding process
US3157924A (en) * 1964-02-12 1964-11-24 Maytag Co Method of casting
DE2622552C3 (en) * 1976-05-20 1979-04-12 Vki-Rheinhold & Mahla Ag, 6800 Mannheim Mold box for the production of castings
JPS5884662A (en) * 1981-11-12 1983-05-20 Toyota Motor Corp Method and device for pressure casting
SU1079353A1 (en) * 1982-05-17 1984-03-15 Московский автомеханический институт Method of casting into sand-clay moulds in autoclave
FR2559407B1 (en) * 1984-02-15 1986-09-05 Pont A Mousson FOUNDRY MOLDING PROCESS AND MOLD FOR PRECISION CASTING UNDER LOW PRESSURE, WITH GASIFIABLE MODEL AND SAND MOLD WITHOUT BINDER
JPS60234736A (en) * 1984-05-07 1985-11-21 Yukio Toyama Vacuum casting method using consumable master pattern
GB2159445B (en) * 1984-06-02 1988-07-06 Cosworth Res & Dev Ltd Casting of metal articles
DE3603310A1 (en) * 1986-02-04 1987-08-06 Leybold Heraeus Gmbh & Co Kg Method and apparatus for the casting of mouldings with subsequent isostatic compression
EP0241426B1 (en) * 1986-04-11 1989-07-12 Schweizerische Aluminium Ag Process and plant for pressure casting
EP0254680A1 (en) * 1986-07-21 1988-01-27 Schweizerische Aluminium Ag Low pressure die casting method
US4724889A (en) * 1987-04-27 1988-02-16 Ford Motor Company Degating technique for clustered castings made by ECP
JP2543898B2 (en) * 1987-07-30 1996-10-16 マツダ株式会社 Full-mold casting method

Also Published As

Publication number Publication date
MX168448B (en) 1993-05-25
PT86142B (en) 1993-08-31
DK600287D0 (en) 1987-11-16
SU1757448A3 (en) 1992-08-23
CA1322098C (en) 1993-09-14
IE873062L (en) 1988-05-17
DK600287A (en) 1988-05-18
JPH0669608B2 (en) 1994-09-07
UA5993A1 (en) 1994-12-29
KR910001179B1 (en) 1991-02-25
ATE53180T1 (en) 1990-06-15
PT86142A (en) 1988-12-15
FI875060A (en) 1988-05-18
IS1521B (en) 1992-12-15
US5058653A (en) 1991-10-22
ES2015320B3 (en) 1990-08-16
FR2606688B1 (en) 1989-09-08
JPS63137564A (en) 1988-06-09
NO167715C (en) 1991-12-04
FI875060A0 (en) 1987-11-16
IS3282A7 (en) 1988-05-18
GR3001011T3 (en) 1991-12-30
EP0274964A1 (en) 1988-07-20
AU8124087A (en) 1988-10-06
NO167715B (en) 1991-08-26
NO874769L (en) 1988-05-18
DE3762952D1 (en) 1990-07-05
NO874769D0 (en) 1987-11-16
FR2606688A1 (en) 1988-05-20
BR8706146A (en) 1988-06-21
KR880005976A (en) 1988-07-21
IE59096B1 (en) 1994-01-12
AU592905B2 (en) 1990-01-25

Similar Documents

Publication Publication Date Title
EP0274964B1 (en) Lost foam casting process for metal pieces
EP0296074B1 (en) Method and apparatus for sand casting composite parts with a fibre insert in a light alloy matrix
EP0461052B1 (en) Lost foam low-pressure casting of aluminium-alloy pieces
FR2582553A1 (en) DEVICE AND METHOD FOR CASTING METAL
EP0426581B1 (en) Process for the lost foam casting of metal pieces under controlled pressure
EP0421039B1 (en) Lost foam pressure casting process for metal pieces
US5014764A (en) Lost-foam casting of aluminum under pressure
CA1335689C (en) Lost foam pressure moulding process of metal parts
CA2016092C (en) Process and device for supplying moulds with liquid metal
WO1984002668A1 (en) Method and device for casting ingots of ferro-alloys by permanent mould casting into cooled copper chills
FR2526341A1 (en) MOLDING MACHINE BY REFOULAGE
FR2662961A2 (en) Lost-foam and low-pressure method for moulding components made from aluminium alloy
FR2644087A2 (en) Improvement to the method for lost-foam moulding of metallic components
FR2653692A2 (en) Improvement to the method for moulding metal components, with lost foam and under controlled pressure
FR2518913A1 (en) METHOD FOR SEMI-CONTINUOUS CASTING OF METALS
FR2597770A1 (en) DEVICE FOR MOLDING THIN PIECES AND LARGE DIMENSIONS OF ALUMINUM ALLOYS
EP0519798A1 (en) Process for the making of high power explosive charge and device for implementing the process
FR2535231A1 (en) Pneumatic piston method for casting metals and other materials, and equipment for carrying out the said method.
JPS60158971A (en) Casting method of molten steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19880805

17Q First examination report despatched

Effective date: 19890424

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 53180

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

REF Corresponds to:

Ref document number: 3762952

Country of ref document: DE

Date of ref document: 19900705

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3001011

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19941020

Year of fee payment: 8

Ref country code: SE

Payment date: 19941020

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19941101

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19941129

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19941130

Year of fee payment: 8

EAL Se: european patent in force in sweden

Ref document number: 87420309.4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19951116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19951117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19951130

Ref country code: CH

Effective date: 19951130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19960531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960601

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3001011

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960601

EUG Se: european patent has lapsed

Ref document number: 87420309.4

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20021018

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20021113

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20021218

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031130

BERE Be: lapsed

Owner name: *ALUMINIUM PECHINEY

Effective date: 20031130

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051116

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061019

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061020

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20071115