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EP3700697B1 - Procédé pour la fabrication de pièces coulées pourvues de microcanaux - Google Patents

Procédé pour la fabrication de pièces coulées pourvues de microcanaux Download PDF

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Publication number
EP3700697B1
EP3700697B1 EP18803559.6A EP18803559A EP3700697B1 EP 3700697 B1 EP3700697 B1 EP 3700697B1 EP 18803559 A EP18803559 A EP 18803559A EP 3700697 B1 EP3700697 B1 EP 3700697B1
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EP
European Patent Office
Prior art keywords
fiber
casting
cavity
manufacturing
fibers
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.)
Not-in-force
Application number
EP18803559.6A
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German (de)
English (en)
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EP3700697A1 (fr
Inventor
Franz-Josef Wöstmann
Jonas KLEI
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Publication of EP3700697A1 publication Critical patent/EP3700697A1/fr
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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
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded

Definitions

  • the invention relates to a method for producing cast parts with microchannels.
  • it is necessary to dissipate excess heat and to protect components from overheating or to control the temperature in a targeted manner.
  • the space available for component temperature control and the need to get as close as possible to the components to be temperature-controlled are of crucial importance, in addition to ensuring heat exchange and removal.
  • cooling is now achieved, for example, via directed forced ventilation by means of a flow of air.
  • Cooling channels can be formed by assembling a housing from several parts. The exposed structure of the cooling channels is shown in one half of the housing, while the other half of the housing closes the cooling channels, or modifications of this described design. In cast components, cooling channels can be created using cores, cast-in tubes or in a subsequent processing step. All variants are subject to geometric constraints such that cooling channels are constrained by length to diameter ratio and shape complexity.
  • lost cores can still be used in order to produce complex hollow structures by casting.
  • the cores are subject to geometric restrictions due to their low strength. So no arbitrary relationship between length, diameter and complexity of the cavity can be set within the cast component.
  • Hollow structures introduced subsequently into a cast component are also known. These are subject to severe geometric constraints in terms of length-to-width ratio and complexity. Undesirable deformations can also occur within the component due to the reduction of internal stress when the hollow structures are introduced.
  • Battery systems for electrically powered vehicles require a controllable cooling system, with the addition being brought in by the cooling system Weight is at the expense of the range of the vehicle and should be minimized.
  • cooling manifolds are formed between individual laminations of a stator core.
  • DE 11 2012 003 041 describes the production of microchannels by means of diffusion welding and/or brazing, which achieves complete channel separation and resistance to the prevailing operating pressure.
  • A1 electrical components are cooled by means of a base plate and metallic foils, which are bonded to one another so that channels with a width of 100 to 350 ⁇ m and a depth of 30 to 150 ⁇ m are created.
  • the mean distance between the channels is 30 to 300 ⁇ m.
  • microchannels are applied to metallic surfaces and sealed by build-up deposition.
  • DE 11 2006 0000 160 describes the formation of microchannels by using an ablative process and arranging multiple layers.
  • the pamphlet U.S. 2003/173720 A1 discloses articles with very small diameter channels that are very closely spaced. These can be made by packing elongated cores in a jig, clamping them, and then inserting matrix material around the cores. The matrix material is formed and consolidated into a unitary body. The cores are pulled out, leaving open channels in the places where they were.
  • the U.S. 5,070,606 A shows a method of making an article having a body with one or more closed channels extending therethrough, such as for the circulation of liquids.
  • the body is preferably formed by metal deposition around one or more fibers to create the trapped channels, with at least one end of the fibers extending beyond the body.
  • the fibers are then pulled out of the ducts in the body to leave the ducts open for fluid to circulate through.
  • the object of the present invention is to enable the most efficient possible cooling of components, with the component size and weight being kept as small as possible. Furthermore, the stated disadvantages of cooling systems according to the prior art are to be avoided.
  • the object is achieved by a manufacturing method for a casting with the features of independent claim 1.
  • the present invention can be provided in particular to integrate cooling directly into components by means of microchannels or to dimension a cooling element or heat exchanger smaller than is possible according to the prior art.
  • the production of the microchannels and their geometric design and positioning are part of the invention.
  • a production method is therefore aimed at producing the component as a cast part with at least one microchannel.
  • At least one fiber is fixed in a cavity of a casting tool. The fiber extends within the cavity and is spaced from a wall of the cavity, with at least one end of the at least one fiber lying outside the cavity.
  • a casting material is introduced into the cavity and the casting material casts around the at least one fiber.
  • a cast part formed from the cast material is removed from the cavity, with the end of the at least one fiber protruding from the cavity protruding from the cast part.
  • the at least one fiber is pulled out of the casting at the end protruding from the casting so that a cavity forming the microchannel remains where the fiber ran in the casting.
  • the use of a fiber to produce the microchannel makes it possible to design the microchannel with a complex course, that is to say, for example, to produce one or more bends in the microchannel.
  • the flexibility of the fiber allows it to be pulled even when it contains one or more bends or bends.
  • a diameter of the channel can be kept particularly small. The space available in the component can thus be used optimally.
  • the at least one fiber can have a diameter of about 5 ⁇ m, for example.
  • the diameter can also be more than 5 microns and for example, a few hundred microns at most, about 500 microns at most.
  • the at least one fiber is typically at least 1 mm long. It may be that the length of the at least one fiber is at most a few hundred mm, for example at most 500 mm, in order to still be able to remove the fiber easily.
  • a bending radius of the at least one fiber when it is arranged in the cavity is at least ten times the diameter of the fiber.
  • 0.5 mm can be provided as the smallest bending radius. Such bending radii can prevent the at least one fiber from being torn off.
  • This smallest bending radius is then reflected in the cast part to be produced as the smallest bending radius of the at least one microchannel located therein.
  • a melting point of the at least one fiber is typically at least 1000°C, for example approx. 1200°C.
  • the fiber is typically chosen so that its temperature resistance is at least 750°C.
  • the at least one fiber can be clamped in a frame, for example.
  • the frame can be positioned in the casting tool.
  • the frame can then delimit the cavity, for example, so that the casting material is introduced into an interior of the frame.
  • Aluminum melt such as Anticorodal AC 70, is preferably used as the casting material in the production process.
  • casting material which contains aluminum and/or magnesium and/or zinc and/or lead and/or copper, for example. So there are about alloys of the materials mentioned in question.
  • cast materials are used with a melting point below 700° C., preferably below 600° C.
  • a low-pressure or gravity casting process can be used as the casting process.
  • the fibers remain in the intended position when the casting material is poured in and, moreover, do not form a material bond with the casting material.
  • die casting investment casting or lost foam methods can also be used.
  • the at least one fiber can be designed, for example, as a glass fiber, for example made of S-glass or E-glass, as a carbon fiber, aramid fiber, mineral fiber or metallic fiber. These materials have turned out to be particularly suitable for avoiding the material connection with the cast material.
  • a pulling force for pulling out the at least one fiber can be controlled or regulated.
  • the force can therefore be varied, in particular during the pulling out, in order to prevent the at least one fiber from being torn off. This can be indicated, for example, when the fiber has a curved or angled course.
  • the at least one fiber comprises a multiplicity of fibers that are provided as yarn, hybrid yarn, fiber bundles, rovings or braiding.
  • a micro-channel with accordingly larger diameter can be achieved and, on the other hand, the extraction can be simplified, since the elements mentioned can be compressible compared to individual fibers.
  • Hybrid yarns with an outer sheath made of glass fibers and a temperature-stable core made of steel filaments can also be used.
  • the properties of the fibers can be adapted to the casting process and to the requirements of the microchannels to be created.
  • At least one core marker can be provided in the cavity, with at least one of the at least one fiber being deflected by means of the at least one core marker.
  • a further step for removing the at least one core mark from the cast part can be provided in the method.
  • the core mark can be connected to the casting tool so that the core mark is removed when the casting is removed from the tool. Holes in the cast part caused by the at least one core mark can then be closed, for example before the removal of the at least one core mark, for example by introducing cast material into the holes.
  • At least one wire for fixing and/or deflecting the fiber can be provided in the cavity, with the at least one wire being made of aluminum or of a material that is suitable for entering into a material connection with the cast material used or in solution to go.
  • the wire designed in this way then connects to the cast material introduced into the cavity in a firm and media-tight manner and does not have to be removed. If the If the wire does not completely dissolve in the cast material, it can remain in the cast part as a foreign body in some designs without significantly impairing its performance or leading to a structural weakening of the cast part.
  • the at least one wire can be designed as a thin wire, for example. It can be prepared inside the tool or in a clamping frame outside the tool.
  • the at least one fiber is infiltrate with a temperature-stable matrix material, preferably water glass or silicate adhesive.
  • the at least one fiber is typically introduced into a shaping tool in an upstream process and infiltrated with the temperature-stable matrix material in order to produce prefabricated preforms that can assume a highly complex shape.
  • the fiber produced in this way is dimensionally stable and can have a curved or angled course. It can then be provided in the cavity, an advantage being that the curved or angled run requires no wires or core markers, or at least fewer wires and core markers than with flexible fibres.
  • the fiber can then only be fixed by means of a frame or only by means of wires or core markers.
  • a degree of infiltration is selected so that, on the one hand, there is sufficient dimensional stability and, on the other hand, the infiltrated fiber or fibers can be removed by pulling them out of the cast part.
  • the invention also relates to a component, in particular a cast part, with which efficient cooling can be made possible.
  • the casting has at least one microchannel made in the manner described above.
  • the cast part can be designed as a coil, for example, or as a housing for a battery or an electric motor. It can also be a component of a machine tool, for example a component for a high-speed application power electronics, a gas turbine, a compressor, a turbine blade, a heat exchanger or a burner.
  • the invention also relates to the use of the cast part described here.
  • the configuration of the channels manufactured in the manner described, in particular their small diameter and typically complex shape, can result in certain types of use being advantageous.
  • cooling media can be used which have a low boiling point and flow through the microchannels in gaseous form at least during part of the use.
  • Liquid media suffer from a significant pressure loss in channels with a small cross section and therefore require correspondingly higher pressures, pump performance and, as a result, higher energy consumption when used in microchannels. As a result, the overall system is reduced in terms of efficiency and economy.
  • the cooling medium can be selected according to the operating temperatures relevant to the application.
  • the cooling medium is typically present with a low admission pressure at the entrance of the microchannels.
  • a cooling medium can, for example, be introduced into the at least one microchannel in a liquid state of aggregation.
  • the cooling medium changes its state of aggregation from liquid to gaseous when the component or the cooling jacket is heated.
  • Refrigerants currently in use can be used as possible cooling media.
  • R123a or ammonia can be used.
  • the boiling point of the coolant can be specifically influenced by the inlet pressure.
  • refrigerants can be used for high efficiency, easy detectability, prevention of ozone damage, etc. to be chosen.
  • the possible transition into the gaseous phase results in a high enthalpy absorption and thus a high cooling capacity.
  • the transition to the gaseous state causes an increase in volume, which results in an increase in pressure in the system.
  • the gaseous cooling medium is thus driven through the cooling channel without an increase in the admission pressure.
  • the cooling process can also take place, for example, according to the thermosiphon or heat pipe principle or according to the principle of a refrigerating machine.
  • figure 1 shows at the top a schematic representation of a fiber 2, which is positioned before a casting process in a casting tool 1 shown at the bottom of the figure.
  • An arrow indicates how the fiber 2 formed from fiber material is introduced into a cavity 1.3 of the tool, with a bend in the fiber 2 following a course of the cavity 1.3.
  • the fiber 2 can thus be arranged essentially centrally in the cavity 1.3, so that it extends at a distance from a wall surrounding the cavity 1.3.
  • the fiber 2 is fixed in the cavity of the casting tool in such a way that its ends protrude from the cavity.
  • molten aluminum for example Anticorodal AC 70
  • the fiber 2 i.e. a region of the fiber that lies in the cavity 1.3, is cast around by the casting material.
  • the casting material can also contain magnesium and/or zinc and/or lead and/or copper instead of or in addition to aluminum.
  • the fiber 2 is designed as a glass fiber, for example made of S-glass or E-glass. In other versions, it can also be selected as carbon fiber, aramid fiber, mineral fiber or metallic fiber.
  • the fiber 2 has been introduced into a shaping tool in an upstream process and has been infiltrated with a temperature-stable matrix material (for example water glass, silicate adhesive, etc.).
  • a temperature-stable matrix material for example water glass, silicate adhesive, etc.
  • the resulting pre-assembled preforms can take on the most complex shape and are then placed in the casting tool.
  • the selected degree of infiltration ensures dimensional stability of the preforms and demoldability from the cast part.
  • the fiber 2 has a diameter of between 5 ⁇ m and 500 ⁇ m and a length of at least 1 mm and at most 500 mm.
  • a bending radius of the fiber 2 is at least ten times the diameter of the fiber and at least 0.5 mm.
  • a melting point of the fiber is over 1200°C and temperature resistance is over 750°C.
  • fibers, fabrics, scrims and other semi-finished fiber products cast in various casting processes are not wetted and do not form a material bond with the aluminum.
  • fibers can be specifically introduced into the casting process, cast around and then pulled out of the component again.
  • the fibers are pulled out of the cast component, creating a microchannel (see also figures 2 and 3 ).
  • the cast part is removed from the cavity and the fiber is pulled out of the cast component in a machine-supported and controlled process in order to prevent tearing within the component.
  • fiber bundles or rovings or yarns or fiber yarns or braids is also possible.
  • Hybrid yarns with an outer sheath made of glass fibers and a temperature-stable core made of steel filaments can also be used.
  • figure 2 shows a schematic representation of the thin-walled cast part 5 with a microchannel 6, its production in connection with FIG figure 1 was described. It has the curved or curved course in the figure 1 shown cavity 1.3.
  • the cast part 5 formed from the cast material was removed from the cavity 1.3, with the fiber 2 protruding at opposite ends of the cast part 5 .
  • One of the ends of the fiber 2 is grasped and pulled out of the casting 5 using the machine assisted and controlled process described above.
  • FIG. 12 shows a schematic representation of the thin-walled casting 5 with microchannel 6.
  • FIG figure 2 in a side view (above) and in a sectional view (below).
  • the microchannel 6 running centrally in the casting 5 can be seen, which has an identical distance that is constant over the length of parallel curved outer sides of the casting 5 and extends over the entire length of the casting 5 and at opposite ends from the Casting 5 emerges.
  • This configuration of the microchannel 6 is explained by the in connection with Figures 1 and 2 manufacturing method described allows.
  • figure 4 1 shows a casting 5 with two microchannels, which was produced using fibers 2 using the method described above.
  • the cast part 5 is shown on the left in a perspective view and on the right in a lateral sectional view, so that the microchannels 6 are visible.
  • the cast part 5 is designed as a coil whose turns are formed from cast aluminum wire with a flattened, rectangular cross-sectional profile. Such flat coils are suitable for making particularly good use of the available installation space. During operation, such coils can also become particularly hot, so that cooling is necessary can be. Prior art cooling devices would run counter to this goal.
  • micro-channels for internal cooling of the individual windings can be introduced using the technology described here. Due to the microchannels shown, no additional components have to be provided.
  • the channels can extend along winding sections. In the example shown, two channels 6 extend parallel to one another between two opposite sides of the coil along two winding sections.
  • cooling media that have a low boiling point and flow through the microchannels in gaseous form.
  • Liquid media suffer from a significant pressure loss in channels with a small cross section and therefore require correspondingly higher pressures, pump performance and, as a result, higher energy consumption when used in microchannels. As a result, the overall system is reduced in terms of efficiency and economy.
  • the liquid cooling medium is selected according to the application-relevant operating temperatures.
  • the cooling medium is present with a low admission pressure at the entrance of the micro-channels. When the component or the cooling jacket heats up, the cooling medium changes its aggregate state from liquid to gaseous.
  • Refrigerants currently in use e.g.
  • R123a ammonia
  • R123a ammonia
  • refrigerants can be selected for high efficiency, easy detectability, prevention of ozone damage, etc.
  • the transition to the gaseous phase results in a high enthalpy absorption and thus a high cooling capacity.
  • the transition to the gaseous state causes an increase in volume, which results in an increase in pressure in the system.
  • the gaseous cooling medium is thus driven through the cooling channel without an increase in the admission pressure.
  • other cast components can also be provided with the microchannels shown in the manner described and then cooled in the manner described when they are used.
  • These other cast components can be, for example, a housing for a battery or an electric motor, or else a component of a machine tool, particularly for high-speed applications. It can also be a component of power electronics, a gas turbine, a compressor, a turbine blade, a heat exchanger or a burner.
  • figure 5 shows the use of a frame 3 with clamped fibers 2 to produce the castings 5 with microchannels 6.
  • the fibers 2 are clamped in a frame 3 outside the tool (on the left in the figure).
  • the frame 3 is placed in the tool 1 (on the right in the figure) and the fibers 2 are cast around.
  • FIG 5 shows how the frame 3 is positioned on a lower mold half 1.1, so that the frame itself lies outside the cavity 1.3 of the casting mold, but the fibers 2 clamped therein run through the cavity 1.3.
  • the casting tool can then be closed by means of an upper tool half.
  • the fibers are flushed with melt, which is fed into cavity 1.3.
  • the frame and sections of the fibers 2 lie outside the cast part.
  • the frame can then be removed and the fibers pulled out. Pulling can again take place in the machine-supported controlled process.
  • the fibers can be designed not only as glass fibers but also as carbon fibers, aramid fibers, mineral fibers or metallic fibers.
  • figure 6 shows the casting 5 with multiple microchannels, its production in connection with figure 5 was described.
  • the frame was removed and the glass fibers 2 were pulled out of the casting, so that where the fibers 2 ran, the microchannels 6 are formed.
  • figure 7 shows a lower half of the tool 1.1 for producing a cast part 5 with a microchannel, with core marks 4 inside the tool serving as fixing or deflection points for the fiber 2 or fibers inside the cavity 1.3 of the tool. The fibers are clamped outside the cavity in the tool.
  • the in figure 5 frames shown are used.
  • the fiber 2 or a semi-finished textile product can map the complex path shown because it is stretched around the core marks 4 in the tool.
  • the fiber is deflected three times.
  • a bending radius of the fiber 2 guided around the core marks is at least ten times the diameter of the fiber and at least 0.5 mm.
  • the core marks 4 are designed in such a way that they do not come into contact with the introduced aluminum melt and can be removed from the component after casting, or the core marks 4 can be connected to the tool so that they can be removed from the cast part when the cast part is removed to be pulled.
  • wires in the cavity for fixing and/or deflecting the fiber for example exactly at the locations of the core marks 4 shown.
  • the wires can be made of aluminum or of a material that is suitable for use with molten aluminum in solution to go.
  • the fibers 2 are prepared using the preferably thin wires inside the tool or using an additional optional clamping frame outside the tool.
  • the wires are cast in during the casting process so that they form a strong connection with the aluminum that is impervious to media.
  • the wires remain in the casting while the fibers can be pulled out after the casting process.
  • figure 8 shows the casting 5, with the in the figure 7 Casting tool shown was made with core brands 4.
  • voids remain within the cast component 5 at the locations where the core marks were 4.
  • the holes are then closed, for example by filling in more melt. This typically occurs before the fiber 2 is pulled out, with the pulling out being advantageously regulated again, since the risk of tearing off can be increased with fibers 2 bent in this way.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (11)

  1. Procédé de fabrication d'une pièce de fonderie (5) pourvue d'au moins un microcanal (6), dans lequel
    - au moins une fibre (2) est fixée dans une cavité (1.3) d'un outil de moulage (1), de sorte que l'au moins une fibre (2) s'étend dans la cavité (1.3) espacée par rapport à la paroi de la cavité (1.3) et au moins une extrémité de l'au moins une fibre (2) se situe à l'extérieur de la cavité (1.3),
    - un matériau de moulage est introduit dans la cavité (1.3) et l'au moins une fibre (2) est incorporée dans le matériau de moulage,
    - une pièce de fonderie (5) formée à partir du matériau de moulage est prélevée dans la cavité (1.3), où l'au moins une extrémité de l'au moins une fibre (2) dépasse de la pièce de fonderie (5),
    - l'au moins une fibre (2) est retirée de la pièce de fonderie (5),
    dans lequel
    au moins un support de noyau (4) est mis en place dans la cavité (1.3) et au moins une des fibres (2) est déviée au moyen de l'au moins un support de noyau (4)
    et/ou
    dans lequel au moins un fil pour la fixation et/ou la déviation de la fibre (2) est mis en place dans la cavité (1.3), où l'au moins un fil est formé à base d'aluminium ou à base d'un matériau qui est approprié pour se lier par liason des matières avec le matériau de moulage ou pour être soluble dans une solution avec le matériau de moulage
    et/ou
    dans lequel l'au moins une fibre (2) est infiltrée dans une matière à matrice thermostable permettant de réaliser une stabilité de forme pour la fibre (2) avec un tracé courbe ou avec des angles.
  2. Procédé de fabrication selon la revendication 1, dans lequel l'au moins une fibre (2) présente un diamètre d'au moins 5 µm et/ou d'au maximum 1000 µm, et/ou dans lequel l'au moins une fibre (2) présente une longueur d'au moins 1 mm et/ou d'au maximum 500 mm.
  3. Procédé de fabrication selon l'une des revendications précédentes, dans lequel un rayon de courbure de l'au moins une fibre (2) est égal à au moins dix fois le diamètre de la fibre et/ou à au moins 0,5 mm.
  4. Procédé de fabrication selon l'une des revendications précédentes, dans lequel un point de fusion de l'au moins une fibre (2) se situe à au moins 1000 °C, et/ou une résistance en température de l'au moins une fibre se situe à au moins 750 °C
    et/ou
    dans lequel l'au moins une fibre (2) est choisie sous forme d'une fibre de verre, d'une fibre de carbone, d'une fibre d'aramide, d'une fibre minérale ou d'une fibre métallique.
  5. Procédé de fabrication selon l'une des revendications précédentes, dans lequel le matériau de moulage est de l'aluminium fondu, de préférence de l'Anticorodal AC 70, ou le matériau de moulage contient de l'aluminium, et/ou du magnésium, et/ou du zinc, et/ou du plomb, et/ou du cuivre, et/ou dans lequel on emploie en tant que procédé de moulage un procédé de moulage à pression réduite ou un procédé de coulée par gravité, ou dans lequel on emploie un procédé de moulage sous pression, un procédé de coulée de précision ou un procédé à mousse perdue.
  6. Procédé de fabrication selon l'une des revendications précédentes, dans lequel l'au moins une fibre (2) comprend un grand nombre de fibres qui sont conçues sous forme de fil, de fil hybride, de stratifil, de faisceau de fibres ou de tresse.
  7. Procédé de fabrication selon l'une des revendications précédentes, dans lequel l'au moins un support de noyau (4) est mis en place dans la cavité (1.3) et au moins une des fibres (2) est déviée au moyen de l'au moins un support de noyau (4), où le procédé comprend en outre une étape permettant l'obturation des trous (7) dans la pièce de fonderie (5) occasionnés par l'au moins un support de noyau (4).
  8. Procédé de fabrication selon l'une des revendications précédentes, dans lequel l'au moins une fibre (2) est infiltrée dans un silicate ou un adhésif de silicate, permettant d'établir une stabilité de forme pour la fibre (2) avec un tracé courbe ou avec des angles.
  9. Procédé de fabrication selon l'une des revendications précédentes, dans lequel l'au moins une fibre (2) est positionnée à l'intérieur d'un cadre (3) et le cadre (3) est positionné dans l'outil de moulage (1).
  10. Procédé de fabrication selon l'une des revendications précédentes, dans lequel une force de traction permettant de retirer l'au moins une fibre (2) est commandée ou réglée.
  11. Procédé de fabrication selon l'une des revendications précédentes, dans lequel la pièce de fonderie (5) est conçue sous forme d'une bobine, ou sous forme d'un boitier d'une batterie ou d'un moteur électrique, ou sous forme d'un composant d'une machine-outil, d'une électronique de puissance, d'une turbine à gaz, d'un compresseur, d'une aube de turbine, d'un échangeur de chaleur ou d'un brûleur.
EP18803559.6A 2017-10-26 2018-10-26 Procédé pour la fabrication de pièces coulées pourvues de microcanaux Not-in-force EP3700697B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017125167 2017-10-26
PCT/EP2018/079515 WO2019081774A1 (fr) 2017-10-26 2018-10-26 Procédé pour la fabrication de pièces coulées pourvues de microcanaux

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EP3700697A1 EP3700697A1 (fr) 2020-09-02
EP3700697B1 true EP3700697B1 (fr) 2022-08-24

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