EP0660765B1 - Procede de fabrication de pieces coulees de precision realisees en materiau composite contenant des fibres - Google Patents

Procede de fabrication de pieces coulees de precision realisees en materiau composite contenant des fibres Download PDF

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Publication number
EP0660765B1
EP0660765B1 EP93918973A EP93918973A EP0660765B1 EP 0660765 B1 EP0660765 B1 EP 0660765B1 EP 93918973 A EP93918973 A EP 93918973A EP 93918973 A EP93918973 A EP 93918973A EP 0660765 B1 EP0660765 B1 EP 0660765B1
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EP
European Patent Office
Prior art keywords
pattern
mold
fibers
process according
preliminary
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
EP93918973A
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German (de)
English (en)
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EP0660765A1 (fr
Inventor
Markus Nolte
Jürgen SCHÄDLICH-STUBENRAUCH
Eric Neussl
Original Assignee
SCHAEDLICH STUBENRAUCH JUERGEN
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/02—Pretreatment of the fibres or filaments
    • C22C47/025—Aligning or orienting the fibres
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1258—Container manufacturing
    • B22F3/1275—Container manufacturing by coating a model and eliminating the model before consolidation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/02—Pretreatment of the fibres or filaments
    • C22C47/06—Pretreatment of the fibres or filaments by forming the fibres or filaments into a preformed structure, e.g. using a temporary binder to form a mat-like element
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/02—Pretreatment of the fibres or filaments
    • C22C47/06—Pretreatment of the fibres or filaments by forming the fibres or filaments into a preformed structure, e.g. using a temporary binder to form a mat-like element
    • C22C47/062—Pretreatment of the fibres or filaments by forming the fibres or filaments into a preformed structure, e.g. using a temporary binder to form a mat-like element from wires or filaments only
    • C22C47/068—Aligning wires
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a method for producing Fiber composite investment castings according to the introductory part of Claim 1.
  • a method for producing precision castings in which using a model material Model formed, then a ceramic around the model Form built up, then the model material melted out, burned out and / or gasified and finally liquid metal is introduced into the mold.
  • Precision castings can be made using such a method produce very complex geometry. Because of one Geometry and due to the fact that after this Process formed ceramic form only relatively low Pressing when inserting the liquid metal into the mold withstands the use of Reinforcing fibers, i.e. the production of fiber composite investment castings not yet practiced.
  • EP-A-0 071 449 describes a method for producing fiber-reinforced investment castings known. It is about a model pre-body, which in a "volatile" Matrix material (model material) embedded fibers consists of a ceramic shape built with a gas-tight layer is provided (applying a coating of a ceramic sealant ", lines 24 and 15 of claim 1 of EP-A-0 071 449).
  • the ceramic shape is with an inlet and provided with an outlet. After the volatilization of the Model material is the liquid metal through the inlet introduced, by generating a vacuum on Outlet a pressure drop within the ceramic form is built up. As a result of this pressure drop, the Fiber material can be permeated with the liquid metal.
  • the fiber material must be be arranged between the inlet and the outlet, so that the ceramic shape is divided into two half-spaces, with the inlet in one and the outlet in the other flows into. It must be avoided that a ("Bypass -") connection between inlet and outlet is created, which does not extend exclusively through the fiber material and / or past the fiber material. Otherwise would namely an infiltration of the fiber material with the liquid metal not or only insufficiently and only take place in certain areas.
  • the fiber material must thus arranged in the form and beyond this shape should be such that the (only) Outlet on the side of the fiber material facing away from the inlet located.
  • the invention has for its object a method for the production of fiber-reinforced investment castings create with which investment castings of different complex Have shape created.
  • mineral fibers are used as fibers. These can be Al 2 O 3 or SiC fibers which are, for example, 10 ⁇ m thick. Handling such fibers can be a health hazard if these fibers are exposed. According to the present method, however, it is possible to machine such fibers mechanically into preforms. When handling these preforms, these fibers are then enclosed by the model material and are therefore no longer a health hazard.
  • the fibers in the form of a bundle of Monofilaments or multifilaments or as woven, non-woven or scrims or as fiber preforms with bridges You can choose from the options given here the respective forms and requirements of the Be cast.
  • wax will be used as the model material becomes.
  • This model material is the most commonly used and usually the easiest to treat. For its removal from the mold is only a relatively low one Energy expenditure required.
  • the method according to the invention can also be carried out in this way be used as a model material plastic resin becomes. Because of the selected fibers and also with regard to this model material for special applications may be particularly suitable.
  • the preform at the ends or edges is freed from the model material and thus the exposed Lots of fibers when building the ceramic form in these are fixedly embedded. In this way, the Preform particularly precise in shape and thus in the too creating casting are placed.
  • the method according to the invention can also be carried out in this way be that the preform by appropriate shaping Geometry and load requirements of the to be manufactured investment casting is adapted.
  • the model will consist of at least one Forebody is formed.
  • the forebody can therefore immediately take the shape of the casting to be made, so no longer needs by applying model material to be trained.
  • Such an approach offers advantages, particularly for simple shapes.
  • one or more preforms for the purpose of the construction of a model are surrounded by model material. In this way, too, it can be made sufficiently precise Place the preform (s) in the model.
  • the method according to the invention requires for the exact Placement of the fibers no permanent bond in the form of Binder bridges or the like between the fibers, such as this is previously known when using preforms. There Such preform trusses hinder metal infiltration.
  • such bridges are dispensed with because the Fibers in the preform are held by the model material until the mold cavity is closed and then the model material is removed.
  • Fig. 1 is shown schematically how from “endless” Fibers 1 strand-shaped cut to the desired length Preform 2 are formed.
  • Preform 2 Preform 2
  • several fibers 1 by rolling through a heated wax bath 4 passed through and impregnated with wax, see above that all individual fibers 1 are wetted with wax.
  • Impregnated wax fiber strand is in a heated die 5 shaped into the desired cross section and in one subsequent cooling device 6 solidified.
  • the thus obtained initially "endless” wax fiber preform is by means of a separator 3 to the desired lengths cut to length.
  • Fig. 2 shows some examples of different cross sections such preform 2. Profiles can be made in this way with a high packing density of the fibers as well as profiles with high section modulus and combinations thereof realize.
  • Fig. 2 is also a flat Preform 7 shown, which e.g. created in the form of a fabric can be.
  • Fig. 3 shows an embodiment of a half 8 of a injection mold consisting of two halves.
  • a pre-body 2 inserted around which a model 9 is built.
  • the preform 2 protrudes both ends beyond the model 9.
  • the preform 2 overmolded with model wax through an injection channel 10 and so that the model contour is filled.
  • Fig. 4 shows an embodiment of a half 12 of a Injection mold, with the inserted preform 2 not emerge from the model body.
  • winding devices for inserting the preform 2 in reproducible model positions in the injection mold can be used winding devices. After Closing the injection mold also becomes model wax here injected, which surrounds the preform (s), so that a model is formed.
  • Fig. 5 shows a finished model with exiting from it exposed fiber ends. These ends are used for fixation the fibers 1 in an investment casting shell.
  • the exposed Lots of fibers are through at Investment casting molds used ceramic slip and sanding material surround and thus firmly in the emerging Form shell anchored.
  • the model material is then melted, burned out, gasified or triggered. When the metal is introduced, it can be placed in the molded shell anchored fibers no longer from their specified, desired Position can be moved out.
  • FIG. 6 finally shows the model according to FIG. 5 in one formed from ceramic slip and sanding material Investment casting shell.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

L'invention concerne un procédé de fabrication de pièces coulées de précision réalisées en matériau composite contenant des fibres, selon lequel au moins un corps préliminaire servant de modèle est produit à partir de fibres et d'un matériau de moulage de modèle et constitue un composant du modèle ou bien le modèle lui-même. Un moule céramique est ensuite réalisé tout autour du modèle. Le matériau de moulage est ensuite enlevé et du métal, sous forme liquide, liquide-solide ou pulvérulente est introduit dans le moule. Si on utilise du métal sous forme pulvérulente, il est liquéfié au moins partiellement. Ce procédé permet de fabriquer des pièces coulées de précision plus résistantes avec un équipement du moulage relativement réduit.

Claims (10)

  1. Procédé de fabrication de pièces obtenues par coulée de précision et réalisées dans un matériau composite contenant des fibres, procédé dans lequel :
    on produit, à partir d'un matériau du modèle et des fibres contenues dans ce matériau, au moins un corps préalable servant de modèle, lequel corps préalable est un élément constitutif du modèle ou le modèle lui-même,
    on constitue ensuite un moule en céramique autour du modèle,
    le matériau du modèle subit ensuite un processus de fusion, de cuisson et/ou de gazéification, où les fibres du corps préalable servant de modèle restent dans le moule en céramique,
    le métal en fusion étant enfin déposé dans le moule
    caractérisé
    en ce que le moule constitué autour du modèle est perméable au gaz, et
    en ce que la pression autour du moule est plus basse par rapport à la pression à l'intérieur du moule, ou
    en ce que la pression à l'intérieur du moule est plus élevée par rapport à la pression autour du moule.
  2. Procédé selon la revendication 1, caractérisé en ce que les fibres utilisées sont des fibres minérales.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les fibres sont utilisées sous forme d'un faisceau de monofilaments ou de multifilaments ou comme des tissus, des voiles ou des tissus non tissés ou comme des ébauches en fibres dotées de ponts de liaison.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on utilise de la cire comme matériau du modèle.
  5. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on utilise de la résine synthétique comme matériau du modèle.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps préalable, au niveau des extrémités ou des bords, est dégagé du matériau du modèle et en ce que les parties de fibres ainsi dégagées sont introduites et fixées dans le moule en céramique au moment où ledit moule est constitué.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps préalable, grâce à un formage adéquat, est adapté aux exigences concernant la géométrie et la charge de la pièce à fabriquer par coulée de précision.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le modèle, seul, est formé au moins par un corps préalable.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un ou plusieurs corps préalables sont entourés du matériau du modèle afin de constituer un modèle.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le moule en céramique perméable au gaz est introduit dans un récipient dans lequel on produit une dépression.
EP93918973A 1992-09-16 1993-09-10 Procede de fabrication de pieces coulees de precision realisees en materiau composite contenant des fibres Expired - Lifetime EP0660765B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4230970A DE4230970C1 (de) 1992-09-16 1992-09-16 Verfahren zur Herstellung von Feingussteilen
DE4230970 1992-09-16
PCT/DE1993/000836 WO1994006582A1 (fr) 1992-09-16 1993-09-10 Procede de fabrication de pieces coulees de precision realisees en materiau composite contenant des fibres

Publications (2)

Publication Number Publication Date
EP0660765A1 EP0660765A1 (fr) 1995-07-05
EP0660765B1 true EP0660765B1 (fr) 1998-01-07

Family

ID=6468089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93918973A Expired - Lifetime EP0660765B1 (fr) 1992-09-16 1993-09-10 Procede de fabrication de pieces coulees de precision realisees en materiau composite contenant des fibres

Country Status (5)

Country Link
US (1) US5649585A (fr)
EP (1) EP0660765B1 (fr)
CA (1) CA2144655A1 (fr)
DE (2) DE4230970C1 (fr)
WO (1) WO1994006582A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6776219B1 (en) 1999-09-20 2004-08-17 Metal Matrix Cast Composites, Inc. Castable refractory investment mold materials and methods of their use in infiltration casting
PT1534451E (pt) 2002-08-20 2007-05-31 Ex One Corp Processo de fundição
DE10323720A1 (de) * 2003-05-24 2004-12-30 Daimlerchrysler Ag Verfahren zur Herstellung eines Werkstücks aus einem Verbundmaterial
DE10332367B4 (de) * 2003-07-17 2008-02-14 Ks Aluminium-Technologie Ag Verfahren zur Herstellung von metallischen Gussteilen mittels des Vollformgießens
US9649687B2 (en) 2014-06-20 2017-05-16 United Technologies Corporation Method including fiber reinforced casting article
CN109304452A (zh) * 2018-11-02 2019-02-05 罗源县白塔乡企业服务中心 一种铜铝双金属复合材料的制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1508655C3 (de) * 1965-10-16 1974-08-29 Gruenzweig + Hartmann Und Glasfaser Ag, 6700 Ludwigshafen Anorganischer Überzug für ein vergasbares Gießmodell und dessen Anwendung
JPS5768261A (en) * 1980-10-15 1982-04-26 Komatsu Ltd Production of turbine impeller
US4476916A (en) * 1981-07-27 1984-10-16 Nusbaum Henry J Method of casting metal matrix composite in ceramic shell mold
JPS5829564A (ja) * 1981-08-17 1983-02-21 Mazda Motor Corp 繊維強化複合体の製造方法
DE3532183A1 (de) * 1985-09-10 1986-01-30 Hans 8450 Amberg Haimerl Metallgussverfahren zur herstellung duennwandiger gegenstaende ohne mechanischen gussvorgang
DE3728918A1 (de) * 1987-08-29 1989-03-09 Monforts Eisengiesserei Gusskoerpermodell und verfahren zum herstellen eines hohlen gusskoerpers
WO1989009669A1 (fr) * 1988-04-15 1989-10-19 Sandvik Australia Pty. Limited Elements composites a base de metal et de metal dur fritte
JPH0489155A (ja) * 1990-08-02 1992-03-23 Hitachi Metal Precision Ltd 複合部を有する精密鋳造品の製造方法
US5394930A (en) * 1990-09-17 1995-03-07 Kennerknecht; Steven Casting method for metal matrix composite castings
JPH04143063A (ja) * 1990-10-04 1992-05-18 Sankyo Eng Kk 強化材添加複合鋳物の製造方法

Also Published As

Publication number Publication date
EP0660765A1 (fr) 1995-07-05
CA2144655A1 (fr) 1994-03-31
DE4230970C1 (de) 1994-07-21
US5649585A (en) 1997-07-22
DE59307953D1 (de) 1998-02-12
WO1994006582A1 (fr) 1994-03-31

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