EP3771506A1 - Casting method with a shaping contour for producing a core, component and system for producing a component - Google Patents

Abstract

The invention relates to a method for producing a component with a cavity, which comprises at least the following steps: providing a profile with ribs, arranging the profile in a core casting tool so that the ribs extend in a space between the profile and the core casting tool, Manufacturing a core in the space between the profile and the core casting tool, removing the profile with the core arranged thereon from the core casting tool, arranging the profile with the core in a casting tool, casting a cast jacket, the cast jacket being in contact with the core and at least in sections Has contact with at least part of the ribs - Removal of the core.

Description

The present property right relates to a casting process in which a shaping contour is used to manufacture a core. The property right also applies to a corresponding component and a system for its manufacture.

Casting processes for producing components with cavities are known from the prior art, in which cores are produced from salt or from other inorganic molding compounds.

On the one hand, the cores are subject to deformation during cooling, which leads to a deviation of the geometry from the target geometry. On the other hand, there are geometric restrictions that result from the mechanical properties of the core materials or the core structures. For example, the ratios of cross section to length that can be achieved in the prior art limited. These processes are therefore only partially suitable for filigree structures. Accordingly, the components known from the prior art also have corresponding inadequacies or can only be produced with relatively great effort.

Against this background, the object of the present invention is to propose an improved casting method and a corresponding component, whereby the problems occurring in the prior art can be at least partially eliminated. Preferably, complex hollow structures should also be made possible at low cost.

This is achieved by a method according to independent claim 1. The advantages according to the invention are also realized by a component according to independent claim 11 and by a system for producing a component according to independent claim 15. Advantageous configurations of the method, the component and the system emerge from the subclaims and from the following description and the figures.

• Bereitstellen eines Profils mit Rippen,
• Anordnen des Profils in einem Kerngusswerkzeug, sodass sich die Rippen in einem Zwischenraum zwischen Profil und Kerngusswerkzeug erstrecken,
• Herstellen eines Kerns in dem Zwischenraum zwischen Profil und Kerngusswerkzeug,
• Entnehmen des Profils mit dem daran angeordneten Kern aus dem Kerngusswerkzeug,
• Anordnen des Profils mit dem Kern in einem Kerngusswerkzeug,
• Gießen eines Gussmantels, wobei der Gussmantel Kontakt zu dem Kern und zumindest abschnittsweise Kontakt zu zumindest einem Teil der Rippen hat,
• Entfernen des Kerns.

Accordingly, a method for producing a component with a cavity is proposed which comprises at least the following steps:

• Providing a profile with ribs,
• Arranging the profile in a core casting tool so that the ribs extend in a space between the profile and the core casting tool,
• Production of a core in the space between the profile and the core casting tool,
• Removing the profile with the core arranged on it from the core casting tool,
• Arranging the profile with the core in a core casting tool,
• Casting a cast jacket, the cast jacket being in contact with the core and at least in sections contact with at least a part of the ribs,
• Removing the core.

In the process, an intermediate product is typically produced, which comprises the profile with the ribs and the core arranged thereon. This is typically characterized by advantageous mechanical properties, which, among other things, can enable the production of filigree structures, whereby complex post-processing or subsequent joining operations can be dispensed with. Furthermore, complex components can also be manufactured inexpensively.

For example, the steps are performed in the order shown above.

Between the ribs, the profile and the casting jacket, where the core is arranged during the casting, typically a plurality of chambers that belong to the cavity of the component remained after the core was removed.

In the process, the profile can be produced, for example, by extrusion or by casting. In one possible design, the profile can be produced together with the ribs in an extrusion or casting process. However, it is also possible for the ribs to be attached to a previously produced starting profile by joining technology.

The profile can be made of metal, in particular aluminum. But it can also be made of plastic.

In the process, the profile can be designed as a hollow cylinder. The ribs can then extend, for example, on the outside of a lateral surface of the hollow cylinder. The ribs can for example run in the axial direction along the outside of the hollow cylinder. A component with such a profile can then have, in addition to the cavities formed by the chambers, one or more additional cavities - in particular the additional cavity located in the interior of the hollow cylinder.

As an alternative or in addition to what has been described above, the ribs can be shorter in possible designs than a total length of the profile and / or be interrupted. This allows neighboring chambers to be present due to the interruptions or the shorter design Passages be fluidically connected to one another. As will be explained later, such an embodiment can be advantageous in particular in the manufacture of electric motors.

In the method, as mentioned, the core can in particular be arranged on the outside of the profile. In the method it can be provided that a form fit is established between the ribs and the core casting tool. In the method it is possible in particular for the ribs to protrude from the core. This can be achieved, for example, by the aforementioned form fit between the ribs and the core casting tool, with those sections of the ribs that produce the form fit with the core casting tool not being accessible to the core material. Sections of the ribs that protrude from the core can then produce a further form fit with the cast casing, whereby an improved connection to the cast casing and thus an overall more robust component can be achieved.

The core can contain, for example, salt and / or sand and / or a temperature-stable molding compound. The core can in particular be formed from a molten salt.

The core can be produced in a casting process, for example in a low-pressure casting process. The manufacture of the core is not limited to such processes. The profile can be heated and / or cooled during the process. For example, the profile can be heated prior to casting the core and / or the profile can be cooled during casting and / or after casting.

In the method, the core can comprise a gate. In possible designs, the gate is removed before the cast jacket is cast.

In the method, the cast casing can be produced, for example, in a die-casting process. The cast casing can also be produced, for example, in a low-pressure casting process or in a gravity die casting process or in a sand casting process. The cast jacket can also be produced in an injection molding process.

In the method, the cast casing can be made of metal, for example aluminum. The cast casing can also be made of plastic, for example.

In the method, provision of one or more cover plates can be provided on the cast casing. For example, at least one cover plate can be cast together with the cast jacket and thus represent part of the cast jacket. The cast casing can then have the shape of a cup. Another cover plate can then, for example, be added in a further process step after the casting of the cast jacket. In another version, both cover plates can also be added later.

In the method, at least one contact opening can be provided in at least one of the cover plates. The at least one contact opening can preferably be arranged in the radially extending area of the cover plate in which the cavity extending between the profile and the cast casing extends. For example, a first contact opening can establish a fluidic connection to one of the chambers. Another contact opening can establish a fluidic connection to a further chamber. Thus, the cavity can be contacted via the contacting opening or the contacting openings by a cooling medium, which can be supplied and discharged through the openings.

The invention also relates to a component with a cavity which is produced by a method as described above. The component comprises a profile with a plurality of ribs and a cast casing. The cavity extends between the profile and the cast casing and the ribs extend in the cavity. The cast casing is connected to the ribs. The cavity can therefore be separated into several chambers by the ribs, the chambers being connected to one another, for example, by interruptions in the ribs or by the ribs being shortened on one or both sides, so that a cooling medium can flow between the different chambers. In particular, the ribs can be shortened at alternately opposite ends or in the vicinity of these Ends are interrupted, so that a passage from one chamber to the next is provided alternately at opposite ends of the component and a substantially meandering space is formed.

In the case of the component, there can be a form fit between the ribs and the cast casing.

The profile and the cast casing can be formed, for example, from a metal, for example from aluminum, or from plastic.

In the case of the component, the cast casing can have a hollow cylindrical section. The cast shell can comprise a cast cover plate. The cast casing can alternatively or additionally comprise an attached cover plate.

One or more contact openings for a cooling medium can be arranged in at least one of the cover plates of the cast jacket. For example, the one or more contact openings can be arranged in such a way that they allow access to the cavity, in particular one of the chambers, between the profile and the cast casing.

The component can represent a component of an electric motor. In particular, it can be a motor housing. In particular, it can be a motor housing of a media-cooled electric motor. The design with the fluidically connected chambers and the one or more contacting openings is particularly suitable for this.

However, the component can also be a structural component with a cavity. A support structure can be present, which can be represented in particular by the profile with the ribs.

The invention also relates to a system for producing a component with a cavity. In particular, it can be a system for producing the component described above or a system for carrying out the method described above.

The system comprises a profile with ribs and a core casting tool for receiving the profile with the ribs, wherein the core casting tool can have one or more rib receiving recesses. At least some of the ribs can be partially inserted into the rib receiving recesses, so that a form fit between the core casting tool and the inserted ribs can be produced. An intermediate space between the profile and the core casting tool - in which the non-inserted sections of the ribs and possibly non-inserted ribs also extend - remains free. This gap can then be filled with the core material. The core material can then fill the remaining spaces between the ribs.

The system can furthermore comprise a casting tool which is set up to receive the profile with the ribs and a core arranged thereon.

It should be emphasized that features that are only described here in connection with the method can also be claimed for the component and the system and vice versa.

In the following, the invention is further explained with reference to figures.

Figuren 1a, b

ein Profil mit Rippen, in einer perspektivischen Ansicht (a) und einer Seitenansicht (b),

Figur 2

ein Gusswerkzeug in geöffnetem Zustand mit teilweise eingesetztem Profil und in einer vergrößerten Ansicht eine Darstellung eines Formschlusses des Gusswerkzeugs mit dem Profil,

Figur 3

das mit Profil mit gegossenem Kern,

Figur 4a, b

eine perspektivische Ansicht eines Gussteils vor dem Entkernen, umfassend das Profil, einen Gussmantel (a) und den Kern, sowie eine Schnittansicht desselben Gussteils (b),

Figuren 5a-c

das als Motorgehäuse ausgebildete Gussteil nach dem Entkernen, von zwei entgegengesetzten Seiten (a, b) sowie in einer vergrößerten Ansicht (c),

Figur 6a

ein komplex geformtes Profil als Stützstruktur für ein Strukturbauteil,

Figur 6b

das Profil aus Figur 6a mit daran angeordnetem Kern,

Figur 6c

das entkernte Strukturbauteil, das Profil aus Figuren 6a und b umfassend, sowie einen gegossenem Gussmantel.

Show in it

Figures 1a, b

a profile with ribs, in a perspective view (a) and a side view (b),

Figure 2

a casting tool in the open state with a partially inserted profile and, in an enlarged view, a representation of a form fit of the casting tool with the profile,

Figure 3

the one with a profile with a cast core,

Figure 4a, b

a perspective view of a cast part prior to core removal, comprising the profile, a cast casing (a) and the core, and a sectional view of the same cast part (b),

Figures 5a-c

the cast part designed as a motor housing after core removal, from two opposite sides (a, b) and in an enlarged view (c),

Figure 6a

a complex shaped profile as a support structure for a structural component,

Figure 6b

the profile Figure 6a with a core attached to it,

Figure 6c

the cored structural component, the profile Figures 6a and b comprising, as well as a cast iron jacket.

Figures 1a and b show different views of a profile 1 with ribs 2, which is produced in an extrusion process. The profile 1 is produced in the extrusion process together with the ribs 2, as a result of which production costs are kept low. Figure 1a Figure 13 shows a perspective view and Figure 1b a side view. The profile 1 has a hollow cylindrical shape, the ribs 2 being arranged on the outside of a lateral surface of the hollow cylinder and extending in the axial direction. As in both Figures 1a and 1b As can be seen, the ribs do not extend over an entire length of the hollow cylinder, but are shortened at the ends, with adjacent ribs being shortened at opposite ends, so that a meander-shaped gap is created.

Figure 2 shows how the profile looks Figure 1a and Figure 1b is inserted into a core casting tool 3 which comprises two tool halves which can be joined together in such a way that the profile 1 with the ribs 2 can be arranged in a cavity of the core casting tool 3. A surface of the core casting tool that delimits the cavity has rib receiving recesses 4 into which the ribs 2 of the profile used can be introduced. As in the one on the right Figure 2 shown enlarged view, the ribs 2 with the rib receiving recesses 4 form a form fit 10. An intermediate space 11 'between profile 1 and core casting tool 3 is limited on the inside by the hollow cylindrical inner part of the profile 1, on the outside by the core casting tool 3 and also bounded laterally by two of the ribs 2. The core can then be produced in this intermediate space 11 'by introducing a core material, in particular a molten salt, there.

Figure 3 now an intermediate product which comprises the profile and the core 5 arranged thereon. The core 5 extends on the outside of the essentially cylindrical profile 1 and is penetrated by the ribs 2. The core 5 has a chamfer 6 which extends axially on one side of the cylindrical profile 1. Radially outer sections of the ribs 2 protrude radially out of the core 5. The gate 6 can be removed in one step of the method.

Figure 4a now shows the intermediate product Figure 3 , with the profile 1 and the salt core 5 arranged thereon, wherein the gate 6 has been removed and, in addition, a cast casting jacket is arranged on the outside of the intermediate product. To produce the cast casing 7, the intermediate product is placed in a casting tool and the cast casing 7 is then produced in a die-casting process, a low-pressure casting process, a gravity die casting process, a sand casting process, or an injection molding process. The cast jacket 7 envelops the intermediate product and is in turn also essentially cylindrical. It also includes a cover plate 8 that was cast in one go. The cast casing 7 engages in a form-fitting manner in the ribs 2, which is made possible by the fact that, as previously described, they protrude a bit from the core material and thus a form fit can be produced for the protruding section.

Figure 4b shows a section through the in Figure 4a arrangement shown. It can again be seen here that some of the ribs 2 do not extend over the entire length of the profile 1 or the cast jacket 7.

Figures 5a to c show the component from the previous figures with the core 5 removed. The core can in particular be removed by detaching it. The component is a housing of an electric motor, with a cavity 11 lying between the profile 1 and the cast casing 7, which is divided into several chambers by the ribs 2 which are connected to one another due to the shortened ribs 2 at the ends of the component. To cool the electric motor, the cavity 11 can be acted upon with a cooling medium which can flow through the cavity, following its meandering shape. The housing of the electric motor is made of metal, in particular aluminum.

Figure 5b shows a rear side of the component, where a cover plate 8 of the cast jacket 7 can be seen. In a radially outer area, at the level of the cavity 11, it has contact openings 9 through which the cavity 11 can be contacted with the cooling medium. On the opposite side can be done in one step. a cover plate can also be arranged during the process; this can for example be attached.

Figure 5c shows in an enlarged illustration the form fit 10 between the ribs 2 and the cast casing 7.

Figures 6a to c refer to a structural component, which can be made of plastic, for example. The production of the structural component takes place analogously to the production of the motor housing, which was described above.

Figure 6a Figure 1 shows a profile 1 with external ribs 2. the profile is cylindrical and the ribs 2 are arranged on its outside thereof.

Figure 6b shows the profile 1 with the core 5 arranged on the outside. This again represents the intermediate product known from the manufacturing process of the electric motor.

Figure 6c Finally, FIG. 4 shows the finished structural component, with a cavity 11 which extends between the cylindrical part of the profile 1, the cast casing 7 and the ribs 2.

1. 1. Verfahren zur Herstellung eines Bauteils mit einem Hohlraum (11), zumindest die folgenden Schritte umfassend:
   • Bereitstellen eines Profils (1) mit Rippen (2),
   • Anordnen des Profils (1) in einem Kerngusswerkzeug (3), so dass sich die Rippen (2) in einem Zwischenraum (11') zwischen Profil (1) und Kerngusswerkzeug (3) erstrecken,
   • Herstellen eines Kerns (5) in dem Zwischenraum (11') zwischen Profil (1) und Kerngusswerkzeug (3),
   • Entnehmen des Profils (1) mit dem daran angeordneten Kern (5) aus dem Kerngusswerkzeug (3),
   • Anordnen des Profils (1) mit dem Kern (5) in einem Gusswerkzeug,
   • Gießen eines Gussmantels (7), wobei der Gussmantel (7) Kontakt zu dem Kern (5) und zumindest abschnittsweise Kontakt zu zumindest einem Teil der Rippen (2) hat,
   • Entfernen des Kerns (5).
2. 2. Verfahren gemäß Aspekt 1, wobei das Profil (1) durch Strangpressen oder durch Gießen hergestellt ist.
3. 3. Verfahren gemäß einem der vorhergehenden Aspekte, wobei die Rippen (2) fügetechnisch aufgesetzt sind.
4. 4. Verfahren gemäß einem der vorhergehenden Aspekte, wobei das Profil (1) aus Metall gefertigt ist.
5. 5. Verfahren gemäß einem der vorhergehenden Aspekte, wobei das Profil (1) als Hohlzylinder ausgebildet ist und die Rippen (2) sich außen an einer Mantelfläche des Hohlzylinders erstrecken und vorzugsweise in axialer Richtung, verlaufen.
6. 6. Verfahren gemäß Aspekt 5, wobei die Rippen (2) sich nicht über eine gesamte Länge des Profils (1) erstrecken und/oder unterbrochen sind.
7. 7. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Kern (5) außen an dem Profil angeordnet wird.
8. 8. Verfahren gemäß einem der vorhergehenden Aspekte, wobei zwischen den Rippen (2) und dem Kerngusswerkzeug (3) ein Formschluss (10) hergestellt wird.
9. 9. Verfahren gemäß einem der vorhergehenden Aspekte, wobei die Rippen (2) aus dem Kern (5) herausragen.
10. 10. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Kern (5) Salz und/oder Sand und/oder eine temperaturstabile Form-masse enthält, insbesondere aus einer Salzschmelze gebildet wird.
11. 11. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Kern in einem Gussverfahren, insbesondere einem Niederdruckgussverfahren, hergestellt wird.
12. 12. Verfahren gemäß Aspekt 11, wobei das Profil (1) vor dem Gießen des Kerns (5) erhitzt wird und/oder das Profil (1) während oder nach dem Gießen gekühlt wird.
13. 13. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Kern (5) einen Anschnitt (6) umfasst, der vorzugsweise vor dem Gießen des Gussmantels entfernt wird.
14. 14. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Gussmantel (7) in einem Druckgussverfahren oder einem Niederdruckgussverfahren oder einem Schwerkraftkokillengussverfahren oder einem Sandgussverfahren oder in einem Spritzgießverfahren her-gestellt wird.
15. 15. Verfahren gemäß einem der vorhergehenden Aspekte, wobei der Gussmantel (7) aus Aluminium oder aus Kunststoff hergestellt wird.
16. 16. Verfahren gemäß einem der vorhergehenden Aspekte, wobei eine Deckplatte (8) des Gussmantels (7) mitgegossen wird.
17. 17. Bauteil mit einem Hohlraum (11), hergestellt in einem Verfahren gemäß einem der vorhergehenden Aspekte, ein Profil (1) mit einer Mehrzahl Rippen (2) und einen Gussmantel (7) umfassend, wobei der Hohlraum (11) sich zwischen Profil (1) und Gussmantel (3) erstreckt und sich die Rippen (2) in dem Hohlraum (11) erstrecken, und wobei der Gussmantel (3) mit den Rippen (2) verbunden ist.
18. 18. Bauteil gemäß Aspekt 17, wobei zwischen den Rippen (2) und dem Gussmantel (7) ein Formschluss (10') besteht.
19. 19. Bauteil gemäß Aspekte 17 oder 18, wobei das Profil (1) und der Gussmantel (7) aus Aluminium oder Kunststoff gebildet sind.
20. 20. Bauteil gemäß einem der Aspekte 17 bis 19, wobei benachbarte Rippen (2) derart an entgegengesetzten Enden verkürzt oder unterbrochen sind, dass ein mäanderförmiger Zwischenraum zwischen den Rippen (2) gebildet wird.
21. 21. Bauteil gemäß einem der Aspekte 17 bis 20, wobei der Gussmantel (7) einen hohlzylindrischen Abschnitt und/oder eine Deckplatte (8) aufweist.
22. 22. Bauteil gemäß einem der Aspekte 17 bis 21, wobei in einer/der Deckplatte des Gussmantels (7) Kontaktierungsöffnungen für ein Kühl-medium angeordnet sind.
23. 23. Bauteil gemäß einem der Aspekte 17 bis 22, wobei es sich um eine Komponente, insbesondere ein Motorgehäuse, eines mediengekühlten Elektromotors oder um ein Strukturbauteil mit einem Hohlraum und einer Stützstruktur handelt.
24. 24. System zur Herstellung eines Bauteils mit einem Hohlraum (11), umfassend
    ein Profil (1) mit Rippen (2),
    ein Kerngusswerkzeug (3) zur Aufnahme des Profils (1) mit den Rippen (2), wobei das Kerngusswerkzeug (3) eine oder mehrere Rippenaufnahmeausnehmungen (4) aufweist, in die zumindest ein Teil der Rippen (2) einführbar ist, so dass ein Formschluss (10) zwischen Kerngusswerkzeug (3) und den Rippen (2) herstellbar ist, und ein Zwischen-raum zwischen dem Profil (1) und dem Kerngusswerkzeug (3) freibleibt.
25. 25. System gemäß Aspekt 24, weiterhin ein Gusswerkzeug umfassend, eingerichtet zur Aufnahme des Profils (1) mit den Rippen (2) und einem daran angeordneten Kern (5).

The present disclosure includes the following aspects, among others:

1. 1. A method for producing a component with a cavity (11), comprising at least the following steps:
   • Providing a profile (1) with ribs (2),
   • Arranging the profile (1) in a core casting tool (3) so that the ribs (2) extend in an intermediate space (11 ') between the profile (1) and the core casting tool (3),
   • Producing a core (5) in the space (11 ') between the profile (1) and the core casting tool (3),
   • Removing the profile (1) with the core (5) arranged thereon from the core casting tool (3),
   • Arranging the profile (1) with the core (5) in a casting tool,
   • Casting a cast casing (7), the cast casing (7) being in contact with the core (5) and at least in sections contact with at least a part of the ribs (2),
   • Remove the core (5).
2. 2. The method according to aspect 1, wherein the profile (1) is produced by extrusion or by casting.
3. 3. The method according to one of the preceding aspects, wherein the ribs (2) are attached by joining.
4. 4. The method according to any one of the preceding aspects, wherein the profile (1) is made of metal.
5. 5. The method according to one of the preceding aspects, wherein the profile (1) is designed as a hollow cylinder and the ribs (2) extend outside on a lateral surface of the hollow cylinder and preferably run in the axial direction.
6. 6. The method according to aspect 5, wherein the ribs (2) do not extend over an entire length of the profile (1) and / or are interrupted.
7. 7. The method according to any one of the preceding aspects, wherein the core (5) is arranged on the outside of the profile.
8. 8. The method according to any one of the preceding aspects, wherein a form fit (10) is produced between the ribs (2) and the core casting tool (3).
9. 9. The method according to any one of the preceding aspects, wherein the ribs (2) protrude from the core (5).
10. 10. The method according to any one of the preceding aspects, wherein the core (5) contains salt and / or sand and / or a temperature-stable molding compound, in particular is formed from a molten salt.
11. 11. The method according to any one of the preceding aspects, wherein the core is produced in a casting process, in particular a low-pressure casting process.
12. 12. The method according to aspect 11, wherein the profile (1) is heated before the casting of the core (5) and / or the profile (1) is cooled during or after the casting.
13. 13. The method according to any one of the preceding aspects, wherein the core (5) comprises a gate (6) which is preferably removed before the casting of the cast jacket.
14. 14. The method according to one of the preceding aspects, wherein the casting shell (7) is produced in a die-casting process or a low-pressure casting process or a gravity die casting process or a sand casting process or in an injection molding process.
15. 15. The method according to any one of the preceding aspects, wherein the cast casing (7) is made of aluminum or plastic.
16. 16. The method according to any one of the preceding aspects, wherein a cover plate (8) of the cast casing (7) is also cast.
17. 17. Component with a cavity (11), produced in a method according to one of the preceding aspects, a profile (1) with a plurality Ribs (2) and a cast jacket (7) comprising, the cavity (11) extending between the profile (1) and the cast jacket (3) and the ribs (2) extending in the cavity (11), and the cast jacket ( 3) is connected to the ribs (2).
18. 18. Component according to aspect 17, wherein there is a form fit (10 ') between the ribs (2) and the cast casing (7).
19. 19. Component according to aspects 17 or 18, wherein the profile (1) and the cast casing (7) are formed from aluminum or plastic.
20. 20. Component according to one of aspects 17 to 19, wherein adjacent ribs (2) are shortened or interrupted at opposite ends in such a way that a meander-shaped space is formed between the ribs (2).
21. 21. Component according to one of aspects 17 to 20, wherein the cast casing (7) has a hollow cylindrical section and / or a cover plate (8).
22. 22. Component according to one of aspects 17 to 21, wherein contact openings for a cooling medium are arranged in one / the cover plate of the cast jacket (7).
23. 23. Component according to one of aspects 17 to 22, which is a component, in particular a motor housing, a media-cooled electric motor, or a structural component with a cavity and a support structure.
24. 24. A system for producing a component having a cavity (11), comprising
    a profile (1) with ribs (2),
    a core casting tool (3) for receiving the profile (1) with the ribs (2), the core casting tool (3) having one or more rib receiving recesses (4) into which at least some of the ribs (2) can be inserted so that a Form fit (10) between the core casting tool (3) and the ribs (2) can be produced, and an intermediate space between the profile (1) and the core casting tool (3) remains free.
25. 25. System according to aspect 24, further comprising a casting tool, set up to receive the profile (1) with the ribs (2) and a core (5) arranged thereon.

List of reference symbols

1

profile

2

rib

3

Core casting tool

4th

Rib receiving recess

5

core

6th

Bleed

7th

Cast jacket

8th

Cover plate

9

Contact opening

10, 10 '

Form fit

11, 11 '

Cavity, space

Claims (15)

Method for producing a component with a cavity (11), comprising at least the following steps: - providing a profile (1) with ribs (2), - Arranging the profile (1) in a core casting tool (3) so that the ribs (2) extend in an intermediate space (11 ') between the profile (1) and the core casting tool (3), - Production of a core (5) in the space (11 ') between the profile (1) and the core casting tool (3), - removing the profile (1) with the core (5) arranged thereon from the core casting tool (3), - Arranging the profile (1) with the core (5) in a casting tool, - Casting a cast jacket (7), the cast jacket (7) being in contact with the core (5) and at least in sections contact with at least part of the ribs (2), - removing the core (5). Method according to claim 1, wherein a form fit (10 ') is produced between the ribs (2) and the cast casing (7). Method according to claim 1 or 2, wherein the profile (1) is produced by extrusion or by casting and / or wherein the profile (1) is made of metal. Method according to one of the preceding claims, wherein the ribs (2) are attached by joining technology and / or wherein the profile (1) is designed as a hollow cylinder and the ribs (2) extend outside on a lateral surface of the hollow cylinder and preferably run in the axial direction. Method according to one of the preceding claims, wherein the ribs (2) do not extend over an entire length of the profile (1) and / or are interrupted. Method according to one of the preceding claims, wherein a form fit (10) is produced between the ribs (2) and the core casting tool (3) and / or wherein the ribs (2) protrude from the core (5). Method according to one of the preceding claims, wherein the core (5) is arranged on the outside of the profile and / or wherein the core (5) contains salt and / or sand and / or a temperature-stable molding compound, in particular is formed from a molten salt. Method according to one of the preceding claims, wherein the core is produced in a casting process, in particular a low-pressure casting process, and / or wherein the profile (1) is heated before the casting of the core (5) and / or the profile (1) during or after is cooled after pouring. Method according to one of the preceding claims, wherein the core (5) comprises a gate (6) which is preferably removed before the casting of the casting jacket and / or wherein the casting jacket (7) in a die-casting process or a low-pressure casting process or a gravity die casting process or a sand casting process or is produced in an injection molding process. Method according to one of the preceding claims, wherein the cast casing (7) is made of aluminum or plastic and / or wherein a cover plate (8) of the cast casing (7) is also cast. Component with a cavity (11), produced in a method according to one of the preceding claims, comprising a profile (1) with a plurality of ribs (2) and a cast casing (7), the cavity (11) being between the profile (1) and casting shell (3) extends and the ribs (2) extend in the cavity (11), and wherein the cast casing (3) is connected to the ribs (2), which is preferably a component, in particular a motor housing, a media-cooled electric motor or a structural component with a cavity and a support structure. Component according to claim 11, wherein between the ribs (2) and the cast casing (7) there is a form fit (10 ') and / or the profile (1) and the cast casing (7) are made of aluminum or plastic. Component according to one of Claims 11 or 12, adjacent ribs (2) being shortened or interrupted at opposite ends in such a way that a meandering space is formed between the ribs (2). Component according to one of claims 11 to 13, wherein the cast jacket (7) has a hollow cylindrical section and / or a cover plate (8), wherein contact openings for a cooling medium are preferably arranged in the cover plate of the cast jacket (7). A system for producing a component with a cavity (11), comprising a profile (1) with ribs (2), a core casting tool (3) for receiving the profile (1) with the ribs (2), the core casting tool (3) having one or more rib receiving recesses (4) into which at least some of the ribs (2) can be inserted so that a Form fit (10) between the core casting tool (3) and the ribs (2) can be produced, and a gap between the profile (1) and the core casting tool (3) remains free, furthermore preferably comprising a casting tool, set up to accommodate the profile (1) the ribs (2) and a core (5) arranged thereon.

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