WO2019063242A1

WO2019063242A1 - Method for removing filling material from a hollow component, cleaning device for removing filling material, method for producing same and program for implementing this method

Info

Publication number: WO2019063242A1
Application number: PCT/EP2018/073570
Authority: WO
Inventors: Christoph Kiener; Angelo RUDOLPHI
Original assignee: Siemens Aktiengesellschaft
Priority date: 2017-09-26
Filing date: 2018-09-03
Publication date: 2019-04-04
Also published as: EP3687709A1; DE102017217019A1

Abstract

The invention relates to a method for removing filling material (16) from a component (11) having a cavity (12). There is provision according to the invention that, for this purpose, use is made of a cleaning device (15) which has a flushing duct (18) by means of which the cavity (12) can be charged with a positive pressure or a negative pressure. To ensure that the cleaning device (15) can be reliably fixed on the surface (14) of the component (11), a suction chamber (19) which can be charged with a negative pressure is provided. The invention also relates to a cleaning device, to a method for producing same and to a computer program product, which assists in the production of the cleaning device.

Description

description

Method for discharging filling material from a hollow component, cleaning device for discharging filling material, method for the production thereof and program for carrying out this method

The invention relates to a method for discharging filling material of a component with a cavity, wherein the cavity has a connection opening to the environment of the component through which the filler material from the cavity can be ^¬ wear. Furthermore, the invention relates to a cleaning device for discharging filling material, wherein the cavity has a connection opening to the surroundings of the component. Moreover, the invention also relates to a method for producing such a cleaning device. Finally, the invention relates to a computer program product for implementing such a method as well as an already ^¬ tellungsvorrichtung for such a computer program.

A method for cleaning components which have been produced using a preferably powder-bed-based additive production method is described in DE 10 2012 024 266 A1. The additively produced components can therefore be inserted into a chamber by applying a

Overpressure or negative pressure are flushed through with air and thus remove residues of powder from the additive-produced component. The components are fixed on a grid in the chamber, which can be traversed by the air.

The method specified at the outset is also described, for example, in US 2016/0074940 A1. According to this document be ^¬ is the problem that components that by means of an additive method, such. As laser melts have been produced in a powder bed, then have to be freed from the not ver ^¬ melted particles of the powder bed. This causes special problems in cavities that were produced in the ^¬ part. To get the powder out of these cavities To be able to remove, the component has connection openings between the cavity and the environment of the component, through which the powder can be discharged. For this purpose, the component can be moved, for example turned or pivoted, in order to transport the powder in the cavity gradually to the connection opening. At complicated

Cavities or large cavities, this process is time consuming and there is also the risk that the powder from the cavity can not be completely discharged.

A similar problem exists in the additive production of components in liquids, as is the case with stereolithography, for example. The component is produced by local solidification of a liquid material (for example a resin compound), wherein the liquid raw material remains in produced cavities. This is as well as the powder as filling material in the cavities on ^¬ deal. This can flow out through connection openings in the component, wherein the component also has to be pivoted or rotated depending on the geometry of the cavity.

Finally, the method initially mentioned must also be angewen ^¬ det when cavities of cast or injection-molded parts must be freed from the core material, which was inserted for the formation of cavities in the mold. The core material is thus also a filling material, which may be located in the cavity of a component. This can be melted, dissolved or mechanically destroyed, depending on the nature of the material, wherein the Füllma ^¬ material in this way becomes flowable and can flow out of the component through the connection opening.

In addition to the liquid-based additive manufacturing processes, the powder-bed-based production processes should also be mentioned because components which are produced in the powder bed with a cavity are automatically filled with the material of the powder bed as filling material. In particular, methods are applicable in which the material from which a construction Part is to be produced, the component is added during the Entste ^¬ hung. In this case, the component is already in its final form or at least approximately in this shape. The building material may for example be powdery or liquid, wherein the material for the production of the component is chemically or physically solidified by the additive manufacturing process.

In order to produce the component, the component descriptive of data (CAD model) are prepared for the selected additive Fer ^¬ operating procedure. The data is converted to create instructions for manufacturing plant in adapted to the Ferti ^¬ transmission method data of the component since ^¬ can proceed with the appropriate process steps for successive production of the component at the manufacturing facility. The data are processed in such a way that the geometric data for the respective layers (slices) of the component to be produced are available, which is also referred to as slicing.

Examples of additive manufacturing include selective laser sintering (also known as SLS for selective laser sintering), selective laser melting (also known as SLM for selective lasers)

Melting) and the electron beam melting (also EBM for Electron Beam Melting) are called. These methods are particularly suitable for the processing of metallic materials in the form of powders, with which design components can be produced. With the SLM, SLS and EBM, the components are produced in layers in a powder bed. These processes are therefore also referred to as powder bed-based additive manufacturing processes. In each case a layer of the powder in the powder bed ^¬ it testifies that is then melted locally by the energy source (laser or electron beam) in those regions or sintered, in which the component is to entste ^¬ hen. Thus, the component is successively produced in layers and can be removed after completion of the powder bed. There is a desire to be able to remove filling material from cavities of building ^¬ parts as completely as possible and in the shortest possible time. The object of the invention is to provide a method for discharging filling material of a component with which the discharge of filler material mög ^¬ done as completely as possible and in a short time who can ^¬. It is another object of the invention to provide means for implementing this method and a method for their preparation. Finally, it is also an object of the invention to specify a computer program for carrying out the production method and a provision device for this computer program.

The object is achieved with the above-mentioned method for discharging filler according to the invention, that over the connection opening a cleaning device with a flushing channel and a suction chamber is placed. The flushing channel is placed with a mouthpiece on a surface of the component surrounding the connection ^¬ opening, thereby a first edge of the mouthpiece around the connec ^¬ tion opening around, ie in a closed polyline, rests on the surface of the component. The first edge is thus closed annularly, so that the opening on the surface can be sealed around by the edge. In addition, the suction chamber is placed with a suction opening on the surface of the component, wherein a second edge of the suction opening outside the connection opening in a closed Linienzug rests on the surface of the component and the suction opening is outside the connection opening. Since the second edge abuts the outside of the connection opening on the surface of the component, a negative pressure can be generated in the suction chamber, with which the cleaning device can advantageously be reliably fixed on the component.

Due to the holding force generated by the suction chamber, both a negative pressure and an overpressure can advantageously be applied via the flushing channel, whereby a flushing with the flushing medium, preferably air (optionally, but Also, a purge gas, such as an inert gas or stick ^¬ substance) or a rinsing liquid (for example, water) is possible. This has the effect that the powder particles or another building material such as, for example, a non-hardened polymer are loosened and / or mixed by the alternating stress, so that a discharge of filling material from the additively produced component can take place. Of course, the method is also suitable to clean components with cavities and thereby discharge filling material, if these components were not produced by an additive manufacturing process.

The negative pressure in the suction chamber advantageously has the effect that, upon discharge of filling material, an overpressure can also be applied to the cavity without the cleaning device lifting off from the surface of the component. In this case, the holding force, which is generated by the negative pressure in the suction chamber, must be greater than the resulting pressure force, which is generated by applying the overpressure in the flushing channel between the cleaning device and the component. In an estimation of the forces acting on the cleaning device, the suction force for fixing the cleaning device can be calculated from the product of the applied negative pressure and the cross-sectional area of the suction opening. The actual lifting force (counteracting the suction force) created by applying an overpressure in the suction channel is more difficult to calculate, since it is also dependent on the resistance of the filling material in the cavity. Since it is lower in any case than if by no ne opening within the first edge of the scavenging duct ^¬ EXISTING the would, the lifting force must be less than the product of the overpressure and the cross-sectional area, which by the first edge in any case Surface of the component is covered. For a process control or design of the cleaning device, the design rule can be used such that the product of the cross-sectional area of the suction opening and negative pressure to be applied is at least as large as the amount of the product of the surface of the Spülkanalöffnung on the surface of the component and the other permissible overpressure. Preferably, the ratio between the amount of said product of the suction opening to the amount of said product of the flushing opening may also be 1.2 - more preferably 1.5 and more preferably 2, thereby further advantageously increasing the safety against lifting.

According to an advantageous embodiment of the invention it is provided that the suction chamber and the suction opening the mouthpiece ring surrounded. In this case, it is advantageously possible gleichmä ^¬ SSIG to the scavenging port around, whereby a particularly secure seat of the cleaning device is made possible on the surface of the component advantageous to arrange the power distribution due to the suction force. In this case, the first edge, which seals the flushing opening of the flushing channel on the surface of the component, can at the same time also separate the suction opening from the flushing channel. The wall of the flushing channel forms so to speak the same time a wall of the Saugkam ^¬ mer, so that the suction opening is sealed by both the first edge and by the second edge. As a result, a particularly simple and compact construction of the cleaning device is advantageously possible. In addition, in the event of leaks at the first edge, material residues which pass out the first edge can be removed via the suction chamber when the flushing channel is pressurized so that they do not escape into the environment.

According to a further embodiment of the invention, the first edge and / or the second edge is equipped with a sealing lip. The sealing lip advantageously bridges any tolerances between the surface of the component of the first and / or second edge. It is made of a material which is designed to be more elastic in comparison to the material of the rest of the cleaning device (ie the walls forming the flushing channel and the suction chamber).

According to a particular embodiment of the method, it is provided that an overpressure and a negative pressure are applied alternately to the flushing channel via the cleaning device. Here, there is in the cavity eddies which loosen the filler material and thereby the discharge vereinfa ^¬ chen. Even the most inaccessible parts of the cavity read ^¬ sen advantageously in this way effectively from Füllmateri- clean al. In particular, in this way, a cavity can be cleaned, which has only one connection opening, so that the flow of a rinsing agent is not possible ^¬ Lich. Advantageously, it can also be provided that the component for discharging the filling material is inserted into a cleaning chamber. Within the cleaning chamber, the cleaning ^¬ constriction device is placed in the manner already described to the component. The cleaning chamber enables advanta- way that may be collected from ^¬ trespassing filling material outside of the cleaning device. This filling ^¬ material can escape, for example, through openings from the cavity of the component, which are not closed by the cleaning device. In addition, the cleaning chamber advantageously makes it possible for an overpressure or negative pressure to be applied to the cavity outside the cleaning device if it has a plurality of connection openings to the surface. This supports the advantageous cleaning ^¬ proceed further. In addition, the application of an overpressure advantageously causes the filling material not to escape from openings of the workpiece which are not closed by the cleaning device. The filling material is transported from these openings by the vacuum and in the direction of the cleaning device, if in this a applied negative pressure is not greater.

Furthermore, the object is achieved by an above-mentioned cleaning device for discharging filling material in that the cleaning device is equipped with a flushing channel for the connection opening and a suction chamber, wherein the flushing channel has a mouthpiece, with a first edge, which around the connection opening on the Surface of a matching component can be placed. Au ^¬ ßerdem, the suction chamber to a suction opening, with a second edge, wherein the suction chamber with the suction opening outside the connection opening on the surface of the ^¬ construction part is placed. With the cleaning device, the above-mentioned method can be carried out, wherein the use of the cleaning device is associated with the advantages stated for the method. The achievable with the cleaning device advantages are therefore not explained again at this point. Furthermore, the object with the above-mentioned Ver ^¬ drive for producing a cleaning device according to the invention is achieved in that the mouthpiece with the first edge and the suction opening with the second edge as a negative mold of a surface region of the component on which the cleaning device is to be placed, is manufactured.

This advantageously makes it possible, even with a complicated component geometry reliable operation of Rei ^¬ nigungsvorrichtung be guaranteed. Characterized in that the cleaning device forms a geometric interface, which forms as a negative mold of the surface region of the component is ^¬ on which it is placed, seal the first edge and the second edge of the flushing channel and the suction port optimally. The above-mentioned method for cleaning can therefore be carried out with high efficiency.

It is particularly advantageous if the negative form of the cleaning ^¬ constriction device from a geometry of the component ^¬ be written record is calculated. The data record can be made available for example by a CAD system, so that the calculation of the negative mold is advantageously possible with high accuracy. In this case, expensive process steps of the measurement of the surface of the component can be saved. CAD data of components to be produced are advantageously always available due to the widespread use of computer-aided manufacturing methods. Particularly when the construction ^¬ part is produced with an additive manufacturing process is the creation of a corresponding CAD data set absolutely necessary. Particularly advantageously, the cleaning device can be produced with an additive manufacturing process. Preferably, it is even possible, with the same additive Fertigungsverfah- the manufacture ren Rei ^¬ nigungsvorrichtung and in particular also in the same production run, in which the corresponding component is produced. As a result, set-up times can advantageously be saved, which would be associated with the separate production of the cleaning device.

According to a further embodiment of the method is pre ^¬ see that the cleaning device is made from two materials, with a mouthpiece and the suction-tasting basic body from a first building material and egg ne sealing lip at the first edge and / or at the second

Edge is made of the second building material. In this case, the second building material is preferably a building material having a higher elasticity than the first building material, whereby tolerances can be compensated for when the sealing lip is placed on the surface of the component. Advantageously, therefore, an improved sealing effect can be achieved.

Furthermore, a computer program product with Programmbe ^¬ is missing for implementation of the encryption according to the invention running and / or claimed the embodiments, in each case the dung OF INVENTION ^¬ proper procedures and / or its embodiments are feasible by means of the computer program product. In addition, a variant of the computer program product including program instructions for configuring a production line for additively Customize claims, wherein the Erstellungsge ^¬ advises is configured with the program instructions such that said cleaning device according to the invention is produced.

In addition, a provision device for storing and / or providing the computer program ^{product is claimed} . The provisioning device is, for example a volume that stores and / or provides the computer program product. Alternatively and / or additionally, the providing apparatus is, for example, a network service, a computer system, a server system, in particular a comparable partitioned computer system, a cloud-based computer system and / or virtual computer system which stores the Computerpro ^¬ program product preferably in the form of a data stream and / or provides. This provision takes place, for example, as a download in the form of a program data block and / or command data block, preferably as a file, in particular as a download file, or as a data stream, in particular as a download data stream, of the complete computer program product. This provision, for example, but also as a partial download SUC ^¬ gen, which consists of several parts, in particular through a peer-to-peer network downloaded or is provided as a data stream. For example, such a computer program product is read into a system using the data carrier provisioning device and executes the program instructions so that the method of the invention is executed on a computer or the authoring device is configured to generate the workpiece of the present invention.

Unless otherwise specified in the description below, the terms "create,""compute,""compute,""determine,""generate,""configure,""modify," and the like, preferably refer to acts and / or processes and / or processing steps that modify and / or generate data and / or convert the data into other data, wherein the data may in particular be displayed as physi ^¬ cal variables or may be present, for example as electrical impulses. In particular, the term "computer" is to be interpreted broadly to cover all electronic devices having data processing capabilities. Computers can thus include, for example, personal computers, servers, handheld computer systems, pocket PC devices, mobile devices, and other communication devices that use computerized data processors, and other electronic data processing devices, which may preferably also be connected to a network. In the context of the invention, "computer-aided" can be understood to ^mean , for example, an implementation of the method in which one or more computers execute or execute at least one method step of the method.

By a "processor" may be understood in the context of the invention, for example, a machine or an electronic circuit. In particular, a processor can be a central processing unit (CPU), a microprocessor or a microcontroller, for example an application-specific integrated circuit or a digital signal processor, possibly in combination with a memory unit for storing program instructions act, etc. In a processor may, for example, also be an IC (integrated circuit, engl. Integrated Circuit), in particular an FPGA (engl. Field Programmable Gate Array) or an ASIC (applying ^¬ dung specific integrated circuit, engl. Application- Specific Integrated Circuit) , or a DSP (Digital Signal Processor). Also, a processor can be understood as a virtualized processor or a soft CPU. It can also be, for example, a programmable processor equipped with a configuration for carrying out the above-mentioned method according to the invention.

In the context of the invention, a "memory unit" can be understood as meaning, for example, a computer-readable memory in the form of a random access memory (RAM) or a hard disk.

Further details of the invention are described below with reference to the drawing. The same or corresponding drawing elements are each marked with the same reference numeral. Chen and are only explained several times, as differences arise between the individual figures.

The exemplary embodiments explained below are preferred embodiments of the invention. In the exemplary embodiments, the described components of the embodiments each represent individual features of the invention that are to be considered independently of one another, which also each independently further develop the invention and therefore also individually or in a different combination than the one shown as part of the invention. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

Show it:

1 shows an embodiment of the inventive method for cleaning by means of an exemplary embodiment of the cleaning device according to the invention schematically cut,

2 shows an embodiment of the inventive method for producing the embodiment of the cleaning device according to Figure 1 by a powder bed based additive manufacturing process schematically cut, another embodiment of a erfindungsge MAESSEN cleaning device schematically cut,

4 shows a further embodiment of the erfindungsge ^¬ MAESSEN cleaning apparatus having a cleaning chamber schematically as a block diagram,

Figure 5 shows an embodiment of the inventive method for producing the cleaning device as a flowchart. In Figure 1, a component 11 is shown schematically. This has a cavity 12 which has two connection openings 13 to the outside. The connection openings thus connect the cavity 12 with a surface 14 of the component. The

Surface 14 is not flat in the direction facing upward in FIG. 1, but has a profile.

On the profiled part of the surface 14, which is also pierced by the connection opening 13, a cleaning device 15 is placed, which is provided for cleaning the cavity 13. In this namely 16 is a filler material in the form of a powder which is contained in a row of the manufacturer ^¬ averaging procedure for the component (for example, by SLM or EBM). The cleaning device is adapted in its profile to the profile of the surface 14, so that it can be placed firmly on the surface of the component 14 via sealing lips 17a, 17b. The cleaning device 15 has a flushing channel 18 and a suction chamber 19. The flushing channel 18 is placed with a mouthpiece 20 above the connection opening 13 such that a first edge 21 formed by the sealing lip 17a seals directly on the connection opening 13 and the surrounding surface 14. The suction chamber 19 surrounds the Spülka ^¬ channel 18 annular and has a second edge 22 which is formed by a sealing lip 17 b, with this second edge 22 can also be placed sealingly on the profiled surface 14. Thus, the suction chamber 19 between the sealing lips 17a, 17b, an annular Saugöff ^¬ voltage 23 is formed.

After the suction device was attached 15 to the component 11, the first edge supports 21 around the conjunction opening 13 on the surface 14 down, since the suction port 20 has a larger cross section than the connection ^¬ opening 13. Similarly, supports the second edge 22 on the surface 14 from. Thus, the mouthpiece 20 and the suction ^¬ opening 23 are sealed from the environment. The first Kan te 21 of the mouthpiece 20 can protrude in consideration of the profile of the surface 14 in comparison to the second edge 22, so that the contact pressure of the first edge 21 is increased compared to the contact pressure of the second edge 22 and thus a better sealing effect is achieved.

The suction chamber 19 is acted upon in accordance with the indicated arrow 24 via a connecting piece 30 with a negative pressure, so that via the suction opening 23, a contact pressure of the cleaning device 15 is effected on the surface 14. Therefore, the flushing channel can be acted upon by a further connecting piece 29 both with an overpressure and with a negative pressure (shown by a double arrow ^¬ 25), whereby a flushing effect is achieved. In this way, the rinsing material 16 is successively discharged from the cavity 12. The connecting pieces 29, 30 are used for attachment of hoses 31, can be applied via the de negative pressure or pressure. According to FIG. 2, an additive manufacturing method for the component 11 in a powder bed 26 is shown. The powder is solidified using a laser beam 27 (application ei ^¬ nes SLM). Simultaneously with the component 11, the Rei ^¬ nigungsvorrichtung 15 according to figure 1 in the powder bed 26 is placed manufacturer. This becomes contour near the surface

14 of the component 11 produced in the powder bed, where this is also placed later. In this case, the cleaning device 15 is connected via support structures 28 of the surface 14 of the component 11 during manufacture. These are to be provided for production purposes and moreover ensure the dimensional accuracy of the suction device 15. After production, the suction device 15 is separated from the component 11 by the support structures 28 being removed. The contiguous production of the cleaning device 15 leads to a precise adaptation of the first edge 21 and the second edge 22 to the profile of the surface 14 of the component 11. Therefore, according to Figure 2 is dispensed with production of sealing lips. These can, as can be seen in Figure 3, at Tolerance problems, however, are subsequently added as sealing lips 17a, 17b and then form elastic edges 21, 22. For this purpose, standardized sealing components can be used ver ^¬ . Alternatively, the cleaning device can also be encapsulated with the material of the sealing lips. Finally, manufacturing methods for the cleaning device can also be used which permit production in the multicomponent method, for example multi-component injection molding. It is also possible to produce components from several components by means of additive manufacturing processes, for example by fused deposition modeling

Called free-form filament extrusion.

In FIGS. 2 and 3, the cleaning devices are shown in such a way that the respective connecting piece 30 for the

Vacuum 24 is outside the cutting line. However, the respective connecting piece 29 can be seen. In addition, the cleaning device 15 is designed in accordance with Figure 3 for a flat surface (and differs in also from the cleaning device according to FIG 2), so that the component can be universally used for connecting openings, the öff ^¬ nen to a flat surface of a component and have a smaller cross-sectional area than the mouthpiece 20th

According to FIG. 4, the cleaning device 15 is integrated in a cleaning system 32, which also has a cleaning chamber 33. In this cleaning chamber 33, the component 11 is inserted and the cleaning device 15 is placed. The cleaning system 32 also has a conduit system with which the fluidization of the filling material (not shown in Figure 4) takes place.

For this purpose, a pressure vessel 34 and a vacuum tank 35 is provided, wherein a pump 36 via a connecting line 37 can build both the negative pressure in the vacuum tank 35 and the pressure in the pressure vessel 34. As flushing medium, air, nitrogen or argon can be used as gases or as liquids tap water, process water of a cleaning bath with detergents and / or surface-active substances and / or anti-corrosive substances,

Deionized water, ethanol, isopropanol, acetone, coal ^¬ hydrogen mixtures, dimethylformamide, oil or chemically active ve ve substances used to decompose the filler who ^¬ the. Mixtures of these substances are also conceivable.

The suction chamber (not shown in FIG. 4) is connected via a first line 38 to the vacuum tank 35. A negative pressure in the suction chamber can be established by opening a first valve 39. A second line 40 also leads via a separator 41 into the vacuum container 35. By opening a second valve 42, the flushing channel (not shown in FIG. 4) can be subjected to a negative pressure via the second line 40. Likewise, by means of the second line 40 by opening a third valve 43, the cleaning chamber 33 can be acted upon by a negative pressure. A third conduit 44 is connected to the pressure vessel 34. By opening a fourth valve 45 can be acted upon by means of the third line 44 of the purge passage 18 (not shown in Figure 4) with an overpressure, as well as a fifth valve 46, the cleaning chamber.

Both in the cleaning chamber 33 and in the separator 41 collects at the bottom of the discharged filler material (not shown). This filling material can be removed via valves 47 from the cleaning chamber 33 and the separator 41. This can be done for example with compressed air support from the pressure vessel 34 by opening the valves 42, 45 and 46. Alternatively, another

pressurized medium are used, for example, a cleaning fluid.

Other valves may be provided to assist the function of the cleaning device. However, these are not shown in Figure 4. For example, 34 valves could be provided between the vacuum tank 35 and the pump 36 and between the pump 36 and the pressure vessel. To support the discharge of filling material from the Ab- Separator 41 could be provided in the line 40 between the vacuum tank 35 in another valve.

For controlling the valves and carrying out the method, a control unit CRL is provided. This is connected by ge ^¬ dashed lines with said valves. By selectively opening each of a part of the valves 43, 43, 45, 46 in the manner mentioned above, the cavity 12 can be acted upon by an overpressure or with a negative pressure. In order to fluidize the material can also alternately an overpressure and a negative pressure in the cavity are generated, the controller CRL this one for the

Fluidization specifies appropriate frequency. According to FIG. 5, steps of generation of one of the

Surface of a component to be manufactured adapted cleaning device shown. In a first step, a design program CAD is used to determine the geometry of a component to be produced with a cavity. This results in a data set PAR which defines the geometry of the component. Optional SIM can be checked whether the emptying of the cavity filler material raises problems when the component is to be play produced by laser melting at ^¬ and is filled with powder by means of a preparation according to Simulationspro ^¬ program.

If problems occur, a geometry of a suitable cleaning device descriptive data is generated by the SUC Konstruktionspro ^¬ program CAD. Here, a program module Cl is used, with the aid of the geometry of the surface of the component is transmitted to the Ver ^¬ binding aperture on the geometry of the cleaning device such automatic ^¬ shows that the first edge and the second edge of the cleaning device is a negative form of the surface of the Component to the use Verbindungsöff ^¬ tion describes. This negative mold can then be combined with an already stored standard geometry of the cleaning device. This standard geometry are at ^¬ play, the connections of the suction and the Saugkam- mer for corresponding hose lines before (see Figure 1). This creates a production data set PRO or alternatively two production data records PRO.

If a manufacturing data set for each generated, the Rei ^¬ nigungsvorrichtung can be produced together with the component in one manufacturing process, wherein a program module C2 carries out a positioning of the cleaning device relative to the component and may incur support structures that are required for the preparation (see FIG. 2). If two data sets production PRO is used, it is also mög ^¬ Lich that the component and the cleaning device are prepared separately.

After production, an aftertreatment AFT is optionally necessary in order, for example, to separate the cleaning device from the component. Furthermore, sealing lips can subsequently be applied to the cleaning device (compare FIG. 3).

Claims

claims

A method of discharging filler material (16) from a cavity (12) provided in a component (11), the cavity (12) having a connection opening (13) to the surroundings of the component (11),

characterized,

a cleaning device (15) having a flushing channel (18) and a suction chamber (19) is placed over the connecting opening (13), wherein

• the flushing channel with a mouthpiece (20) to a surrounding said Ver ^¬ connection opening (13) surface of the component (11) is placed, while a first edge (21) of the mouthpiece (20) around the connection opening (13) around on the Surface of the component (11) is present,

• The suction chamber (19) with a suction opening (23) outside the connection opening (13) is placed on the surface of the ^¬ construction part while a second edge (22) of the suction opening (23) rests on the surface of the component (11).

2. The method according to claim 1,

characterized,

the suction chamber (19) and the suction opening (23) surround the mouthpiece (20) in an annular manner.

3. The method according to claim 2,

characterized,

the first edge (21) also separates the suction opening (23) from the flushing channel (18).

4. Method according to one of the preceding claims, characterized in that

in that the first edge (21) and / or the second edge (22) are provided with a sealing lip (17a, 17b).

5. The method according to any one of the preceding claims, characterized alternately applying an overpressure and a negative pressure to the flushing channel (18).

6. The method according to any one of the preceding claims,

characterized,

in that the component (11) for discharging the filling material is inserted into a cleaning chamber (33).

7. The method according to claim 6,

characterized,

that the cleaning chamber (33) is subjected to an overpressure and / or negative pressure.

8. Cleaning device for discharging filling material (16) from a cavity (12) present in a component (11), the cavity (12) having a connection opening (13) to the surroundings of the component (11),

characterized,

in that the cleaning device is equipped with a flushing passage (18) for the connection opening (13) and a suction chamber (19), wherein

• The flushing channel has a mouthpiece (20), with a

first edge (21) which can be placed around the connection opening (13) on the surface of the component (11),

• The suction chamber (19) has a suction opening (23), with a second edge (22), wherein the suction chamber (19) with the suction opening (23) outside the connection opening (13) on the surface of the component (11) can be placed.

9. A method for producing a cleaning device (15) according to claim 8,

characterized,

that the mouthpiece (20) with the first edge (21) and the

Suction opening (23) with the second edge (22) as a negative mold of a surface region of the component (11) on which the cleaning device (15) is to be placed is made.

10. The method according to claim 9,

characterized,

the negative form is calculated from a data record (PAR) describing the geometry of the component (11).

11. The method according to claim 9 or 10,

characterized,

the cleaning device (15) is manufactured using an additive manufacturing process.

12. The method according to claim 11,

characterized,

that the cleaning device (15) is made from two materials, with a mouthpiece (20) and the suction ^¬ chamber (19) having Direction base body from the first building material and a sealing lip (17a, 17b) at the first edge (21) and / or at the second edge (22) of the second building material.

13. Computer program ^product with program ^{instructions for} carrying out the method according to claim 10.

14. Computer program product with program instructions for a manufacturing plant, which is koni ^¬ ized by means of the program commands to produce the workpiece according to any one of claims 11 or 12.

15. Deployment device for the computer program product of claim 13 or 14, wherein the providing device storing the computer program product and / or be riding provides ^¬.