Device for thermal spraying, manufacturing method for manufacturing such a device, and use of an additive manufacturing method

Abstract

The invention relates to a device for thermally spraying a coating material onto a substrate body to be coated, the device comprising: a burner housing part having a combustion chamber, an input side for supplying process media, and an output side for dispensing a hot process gas, the burner housing part being generated by means of an additive manufacturing method.

Description

[0001] Page 1 / 68 Applicant: SMS group GmbH Our reference: P80839DE May 19, 2023 Device for thermal spraying, manufacturing method for manufacturing such a device, and use of an additive manufacturing method The invention relates to a device for thermally spraying a coating material onto a substrate to be coated. The invention further relates to a manufacturing method for manufacturing a device for thermally spraying a coating material onto a substrate to be coated. The invention also relates to the use of an additive manufacturing method. Generic devices for thermal spraying are known from the prior art, among others, as HVOF burners (high-velocity oxygen fuel burners), HVAF burners (high-velocity air fuel burners), or the like.In this type of thermal spraying, particles to be applied to a substrate are heated using a thermal energy source and accelerated onto a surface of the substrate. Using the particles applied in this way, one or more layers can be built up on the substrate, particularly through adhesion and / or cohesion. Page 2 / 68 P80839DE The particles used and to be melted are generally in powder form. In thermal spraying, particularly using High Velocity Oxygen Fuel (HVOF) or High Velocity Air Fuel (HVAF), process media such as kerosene, hydrogen, propane, etc. are used to generate process energy through oxidation, i.e., combustion.While traditional HVOF burners usually only use kerosene or propane and oxygen as fuel gas to generate process energy, HVAF burners can use hydrogen and / or propane in combination with compressed air to generate process energy. HVOF / HVAF systems also exist in which kerosene or propane, hydrogen, nitrogen, and oxygen are used to generate the required process energy. The combustion of the fuel gas typically takes place in a combustion chamber of the thermal spraying device. A discharge nozzle, usually a Laval nozzle, is connected to the end of such a combustion chamber to further accelerate the fuel gas in addition to the combustion expansion. The particles to be melted or partially melted, or the corresponding powder, are usually introduced radially into the fuel gas just behind the narrowest cross-section of the discharge nozzle.Alternatively, the particles can also be introduced axially into the combustion chamber of the thermal spraying device in powder form, together with other gases. However, known thermal spraying devices are often very energy-intensive and thus frequently ineffective to operate, which is partly due to their previous design. Page 3 / 68 P80839DE The object of the invention is to provide an improvement or alternative to the prior art. In particular, the object of the invention is to enable more energy-efficient operation of thermal spraying devices.The object of the invention is achieved by a device for thermally spraying a coating material onto a substrate body to be coated, comprising a burner housing part having a combustion chamber, an inlet side for supplying process media, and an outlet side for discharging a hot process gas, wherein the burner housing part is generated using an additive manufacturing process. Because the burner housing part is manufactured using an additive manufacturing process, the present thermal spraying device can be constructed significantly more compactly, which, on the one hand, allows the process media required for operating the device, such as in particular fuel, and, on the other hand, simultaneously reduces heat losses at the device.Overall, this can significantly reduce the amount of energy required for thermal spraying, making the thermal spraying device in question much more effective. A burner housing component manufactured using an additive manufacturing process can also reduce the number of joints between individual subtractively manufactured components, thereby eliminating any areas of the burner housing component that are susceptible to process media leakage. The term "additive manufacturing process" is often also referred to as generative manufacturing, whereby additive manufacturing refers to the process itself. Page 4 / 68 P80839DE orIn contrast to traditional subtractive manufacturing processes such as milling, drilling, turning, eroding, or the like, generative manufacturing processes are particularly characterized by the fact that materials can be added essentially layer by layer in order to advantageously manufacture components such as the present burner housing part in a more compact manner. Such additive manufacturing processes also make it possible to completely eliminate manufacturing processes based on joining methods such as welding, soldering, or the like. In contrast to conventional subtractive manufacturing processes, the additive manufacturing process makes it possible to provide the present device for thermal spraying in a particularly compact manner, even if a large number of additional functional areas, functional elements, or the like are present or configured, particularly on or specifically in the burner housing part.For the purposes of the invention, various additive manufacturing processes can be used, such as a 3D printing process, a 3D laser sintering process, or the like. In particular, laser beam melting processes (LBM processes; (laser beam melting)) are also suitable for use within the meaning of the invention. It is advantageous if formless or shape-neutral materials are used for production. For the purposes of the invention, formless materials are, for example, liquids, powders, or the like, whereby shape-neutral materials can be in strip, wire, or the like. Page 5 / 68 P80839DE With regard to the aforementioned 3D printing process, a distinction can be made between powder bed processes, free-space processes, and liquid material processes.Powder bed processes include laser beam melting (LBM), selective laser sintering (SLS), selective heat sintering (SHS), binder jetting (solidifying powder material using a binder), and electron beam melting (EBM). Free-space processes include fused deposition modeling (FDM) or fused filament fabrication (FFF), laminated object modeling (LOM), cladding, wax deposition modeling (WDM), contour crafting, cold injection molding, and electron beam melting (EBW). Liquid material processes include, for example, stereolithography (SLA) and micro-SLA, digital light processing (DLP), and liquid composite molding (LCM). The following materials can be used in the above processes, among others: 1.2709, 1.4540, 1.4542, 1.4404 (316L), AlSi10Mg, Scalmalloy®, CuNi2SiCr, CuCr1Zr, pure copper, CoCrW, Inconel718, Inconel 625, TiAl6V4, Hastelloy® C22. In other words, the thermal spraying device generated by means of an additive manufacturing process can comprise one of the above materials or consist of one of the above materials, whereby any coatings applied by the additive manufacturing process are not to be taken into account. A more compact design within the meaning of the invention can be achieved particularly easily if production takes place at least partially from a data set for operating a single production facility. Preferably, only a single data set is required for production, which contains all information for producing, in particular, the present burner housing part.The present thermal spraying device can be configured for different thermal spray application methods, including as an HVOF burner device for thermal spraying or an HVAF burner device for thermal spraying. Furthermore, the present thermal spraying device, with appropriate configuration, can be provided as an external coating device for thermally spraying an external coating onto a substrate body or for thermally coating a substrate body, such as a roller part, a pipe part, a drum part, or the like, or alternatively as an internal coating device for thermally spraying an internal coating onto a substrate body or for thermally coating the inside of a substrate body.The term "combustion chamber" describes a functional area of ​​the thermal spraying device within the burner housing part, into which selected process media are introduced, ignited, and discharged at accelerated speed as hot gas. In this respect, the burner housing part can also be regarded as the actual "burner" of the device in question. The term "inlet side" describes an area of ​​the burner housing part, in particular in front of (upstream of) the combustion chamber, in which supply lines for process media are arranged. This inlet side can be designed, in particular, as an area between a receiving surface for receiving an external connection part (Page 7 / 68 P80839DE) for the cumulative supply of process media and the head side of the combustion chamber.The term “outlet side” describes a region of the burner housing part, in particular behind (downstream) of the combustion chamber, in which region in particular the hot gas duct for discharging the hot gas from the combustion chamber is arranged. The hot gas duct can preferably have a curved section, wherein the curved section is designed to deflect the process hot gas within the burner housing part. The curved section can deflect the process hot gas by greater than or equal to 10°, preferably by greater than or equal to 25° and particularly preferably by greater than or equal to 45° or greater than or equal to 75°. Furthermore, the curved section can preferably deflect the process hot gas by greater than or equal to 60°, preferably by greater than or equal to 80° and particularly preferably by greater than or equal to 85° or greater than or equal to 90°.This output side can be designed, in particular, as an area between a receiving surface for receiving an external head section and the base side of the combustion chamber. It is therefore advantageous if the burner housing part is monolithic. A monolithic shape or construction allows the burner housing part to be realized extremely simply, whereby its design can be reduced to an extremely simple shape. In particular, the combustion chamber and especially the areas around the combustion chamber can be material-optimized and thus constructed very compactly. Page 8 / 68 P80839DE Overall, this can significantly reduce energy losses in the device, allowing the device to be operated more efficiently. In this respect, the burner housing part is preferably formed as a single monolithic block.In other words, this means that the combustion chamber as well as the inlet side and the outlet side are physically formed as a single monolithic block. A "monolithically" formed component is understood in particular to mean a component of the device, such as the burner housing part, which is manufactured as a single, coherent and seamless component. In other words, the monolithically formed burner housing part is not composed of several individual parts, nor is it joined together from a plurality of individual parts, for example by means of a welding process. The burner housing part can be designed to be particularly compact if the inlet side and the outlet side are formed monolithically with one another.This makes it possible to dispense with additional connecting elements or component interfaces, especially in relation to the combustion chamber, which significantly reduces the risk of heat loss. In particular, the advantageous reduction of component interfaces enables a smaller and thus more compact design of the thermal spraying device, especially its burner housing. Page 9 / 68 P80839DE Conventional thermal spraying devices have always been constructed in multiple parts. In this case, the number of required components on the thermal spraying device can be advantageously reduced.Due to the large number of different components used and the associated more voluminous design, particularly with regard to a greatly enlarged surface compared to the surroundings, the prior art results in significantly greater and / or more unevenly distributed heat losses to the surroundings across the device than is the case with the present thermal spraying device, particularly with regard to comparable combustion chamber sizes. In this context, it is particularly advantageous if transition areas between the combustion chamber and the inlet side and the outlet side are formed monolithically. This allows the burner housing part to be built even more compactly. It is particularly advantageous that cavities can be created in the burner housing part particularly advantageously using the additive manufacturing process.In this respect, it is advantageous if the burner housing part has material recesses, in particular internal material recesses, wherein interfaces between the material recesses and the burner housing part are monolithic. Such material recesses can be shaped in almost any way using the additive manufacturing process, and in any case in a more diverse way than is usually possible with subtractive manufacturing processes. In particular, the interfaces can be designed or formed with continuous tangents. The interfaces can be designed or formed as free-form surfaces. As a result, the material recesses can be free of disadvantageous edges, sudden cross-sectional changes, or the like. It is also advantageous if structures are arranged on or within material recesses in the burner housing part, wherein the structures and the burner housing part are monolithic.Such structures can be shaped differently in order to be able to assume different functions, particularly with regard to the burner housing part. For example, the structures are designed or formed as material meshes, guide elements, or the like on the burner housing part or within the burner housing part. Furthermore, it is advantageous if the inlet side has a first supply line for a primary fuel, wherein the first supply line and the combustion chamber are monolithic. This allows the burner housing part to be structurally simple, in particular with a small number of component interfaces on the present device for thermal spraying.If the inlet side has additional supply lines for additional process media, wherein the additional supply lines and the combustion chamber are monolithic, the burner housing part can still be constructed very compactly despite a large number of supply lines. This compact design can also be transferred to specific embodiments of the thermal spraying device, in which at least a first additional supply line for material transport is directly connected to a pre-combustion chamber and a second additional supply line for material transport is directly connected to the main combustion chamber, wherein the additional supply lines can be configured to guide the materials to the respective areas of the pre-combustion chamber or the main combustion chamber as required. If the outlet side has a hot gas duct, wherein the hot gas duct and the combustion chamber are monolithic, the burner housing part can also be constructed very compactly at its outlet end.The present thermal spraying device can be designed more simply in the sense of an internal coating device if the hot runner has at least one curved section. It is understood that such a curved section within the burner housing part, in particular within the outlet end thereof, can be manufactured using an additive manufacturing process. In particular, internal curved material recesses can be manufactured advantageously and with high aerodynamic quality within the burner housing part using an additive manufacturing process. This applies equally to the hot gas duct, other supply lines, the combustion chamber, and the like.The design of the burner housing part can be particularly simplified if supply lines for supplying process media on the inlet side of the burner housing part and a hot gas duct for discharging a hot gas on the outlet side of the burner housing part are monolithic. In any case, the present thermal spraying device can be operated significantly more effectively due to the monolithic design. In addition to the more effective operation of the present thermal spraying device described above, the additive manufacturing method proposed here also enables particularly simplified production. Until now, almost every function on a thermal spraying device was assigned a separate component, which was also manufactured conventionally, i.e., using subtractive manufacturing processes.In the present case, however, the burner housing part, in particular, preferably consists of only a single component, which also allows the overall production of the present thermal spraying device to be considerably simplified; in particular, the time required for assembly and / or disassembly work can be significantly reduced. In particular, the burner housing part can be used to significantly reduce the number of component interfaces on the thermal spraying device according to the invention, as will be described in more detail later.At this point, only a few components of conventional thermal spraying devices are mentioned as examples, which require component interfaces that can be eliminated or at least significantly reduced in the present case, such as with regard to the combustion chamber housing part in general, with regard to the combustion chamber, a kerosene or propane nozzle or a burner mixing nozzle in particular, etc. In particular, the high time expenditure to date is due to the many existing component interfaces, all of which must be properly assembled and sealed in order to be able to provide a flawless and reliable thermal spraying device in accordance with the state of the art.Improper assembly, for example, can lead to process media mixing too early or even unintentionally, which can, for example, "only" result in reduced performance or, in the worst case, an explosion in the thermal spraying device. If, in particular, the torch housing part is manufactured according to the invention using an additive manufacturing process, the number of required component interfaces can be significantly reduced. In this case, a reduction in the number of components, a simplification of disassembly and assembly work, and an increase in functional reliability of the thermal spraying device proposed here can be achieved.The structure of the present thermal spraying device can be advantageously constructed if the device has a head part with a discharge nozzle element and with an injector element for injecting coating material into the head part, wherein the head part is manufactured using an additive manufacturing process. The thermal spraying device can be structurally simple if the head part and the burner housing part are monolithic, in particular as a single monolithic block. This allows the number of component interfaces to be kept low, whereby the advantages already described above, in particular with regard to the more compact design, can be easily achieved. Furthermore, the head part can preferably be integrated into the burner housing part, wherein the head part and burner housing part are monolithic.As a result, the functionality of the head section can advantageously be combined with the functionality of the burner housing section in a common monolithic component, in particular in a monolithic burner housing section. Components of the head section that are subject to wear can be replaced more easily on the thermal spraying device if the head section and the burner housing section are firmly but detachably connected to one another. This allows the head section to be easily replaced in its entirety. In the latter variant, the functional components "burner housing section" and "head section" of the thermal spraying device are connected to one another, for example, with a screw connection. Page 15 / 68 P80839DE The component interface provided here can be sealed with suitable sealing means, in particular with sealing elements, preferably with one or more sealing rings.To arrange the detachable head part, it is advantageous if the device has a receiving surface for receiving the head part, wherein the receiving surface and the burner housing part are formed monolithically. Furthermore, it is expedient if the device has an injector tube part for providing coating material to an injector element of a head part of the device, wherein the burner housing part forms a holder for holding the injector tube part. This allows the injector tube part to be arranged in a defined manner on the burner housing part. To improve the thermal properties of the device for thermal spraying, it can be made of a material with a thermal conductivity of less than or equal to 50 W / mK, preferably less than or equal to 40 W / mK, particularly preferably less than or equal to 30 W / mK or less than or equal to 20 W / mK. In a particularly preferred embodiment, the device is made of the material 1.4404 (316L) using an additive manufacturing process, which has a thermal conductivity of 15 W / mK. Alternatively, the thermal spraying device can be generated using an additive manufacturing process from copper (thermal conductivity: ~399 W / mK) or aluminum (thermal conductivity: ~237 W / mK) or bronze (thermal conductivity: ~62 W / mK) or a steel with a thermal conductivity of less than or equal to 50 W / mK. Page 16 / 68 P80839DE Optionally, the material from which the burner housing part was generated using additive manufacturing has a thermal expansion coefficient of less than or equal to 15 * 10. -6 K -1To homogenize the distribution of the coating material in the hot gas stream emerging from the discharge nozzle and / or to reduce adhesion of coating material to the surface of the discharge nozzle, the injector element can be arranged in the thermal spraying device such that the coating material can be fed to the hot gas stream at an angle of less than or equal to 50° to the main coating axis of the thermal spraying device, preferably at an angle of less than or equal to 25° and particularly preferably at an angle of less than or equal to 15° or even less than or equal to 5°. Particularly preferably, the head part can be monolithically integrated into the burner housing part.Preferably, a part of the burner housing part enclosing the combustion chamber can be mounted fixedly on both sides of its longitudinal direction relative to a region of the burner housing part forming the outer wall of the device for thermal spraying. To improve the cooling of the pre-combustion chamber, the latter can be surrounded by the internal cooling on its outer wall in a region of greater than or equal to 70% of its total longitudinal extent, preferably greater than or equal to 80% and particularly preferably greater than or equal to 90% or even greater than or equal to 95%. Page 17 / 68 P80839DE A variant can be advantageously configured if the device has a cooling device for cooling the substrate body, wherein the cooling device or at least regions thereof and the burner housing part are monolithic. Due to this monolithic formation orThanks to its design, the present thermal spraying device can still be implemented in an extremely compact manner despite additional functional scopes, in particular despite an integrated substrate body cooling device. This is particularly advantageous when the present thermal spraying device is used, for example, as an internal coating device, where an extremely compact design is particularly important in order to be able to sufficiently integrate the thermal spraying device even into the tight installation spaces of a substrate body. For example, the present thermal spraying device can be used to easily perform thermal internal coatings on pipes or the like, even with small internal diameters of less than 100 mm.Advantageously, the present thermal spraying device can be used to effectively cool the substrate body immediately during a thermal coating process, effectively counteracting the process heat introduced into the substrate body. This alone makes particularly stable coating processes consistently possible, even with difficult internal dimensions on a substrate body to be thermally coated. Page 18 / 68 P80839DE Previously known thermal spraying devices provide for the combustion chamber to have a separate combustion chamber housing opposite the housing of the entire device. This separate combustion chamber housing is fixedly mounted axially on one side within the housing of the entire device, while on the correspondingly opposite side it is only loosely mounted in the axial direction.This mounting principle requires that the combustion chamber housing be rigidly mounted on the hot gas duct side, whereby at least a free cross-section for supplying reactants for combustion depends on the expansion state of the combustion chamber, so that a stable, constant coating process cannot be guaranteed. Accordingly, the monolithic structure of the combustion chamber housing proposed here in combination with the housing of the thermal spraying device advantageously ensures predominantly constant geometric conditions, whereby a constant volume flow of reactants for combustion and / or a stable coating process can be achieved with the device proposed here. Thus, optimal coating results on a substrate body can be achieved using the proposed thermal spraying device.Furthermore, it is advantageous if the cooling device has at least one coolant channel for conducting coolant, which extends in particular from the inlet side of the burner housing part to the outlet side of the burner housing part, wherein the at least one coolant channel and the burner housing part are monolithically formed. Page 19 / 68 P80839DE Specifically due to the monolithic shape or construction, one or even several coolant channels can be compactly integrated into the present thermal spraying device. In particular, such coolant channels can be guided compactly from the inlet side to the outlet side through the burner housing part.Furthermore, it is expedient if the cooling device has at least one cooling nozzle for spraying out coolant, which is arranged in particular on the outlet side of the burner housing part, wherein the at least one cooling nozzle and the burner housing part are monolithic. In order to be able to carry out a thermal coating process more advantageously, it is advantageous if the at least one cooling nozzle and the discharge nozzle have different directions of action. This can reduce the risk that the application of coatings to a substrate body is negatively influenced by coolant. Especially when using the device for thermal spraying in the sense of an internal coating device, it is advantageous if the at least one cooling nozzle is arranged opposite the receiving surface for receiving the head part on the burner housing part.As a result, the coolant and the coating material can be applied independently of one another to opposite regions of the substrate body. Different coolants can be used here. The cooling device is preferably configured so that compressed air, nitrogen, in particular gaseous nitrogen and / or a gaseous mixture of nitrogen and oxygen, carbon dioxide, inert gases, or the like can be sprayed by means of the at least one cooling nozzle. Page 20 / 68 P80839DE Furthermore, it is advantageous if the at least one cooling nozzle has a main nozzle axis which is arranged at an angle of 15° or more and 75° or less, preferably at an angle of 45°, to a main coating axis of the discharge nozzle. The main nozzle axis and the main coating axis are the same as the center axis of the respective nozzle.If the present thermal spraying device is used as an internal coating device, the angle mentioned here is similar, but is preferably arranged opposite the receiving surface for receiving the head part, mirrored on the central axis of the thermal spraying device or the torch housing part thereof. Preferably, an offset of the point of impact of the coolant on the substrate body of at least 3 x the coating spot diameter before and / or after the coating point and of a maximum of 20 x the coating spot diameter before and / or after the coating point, preferably of 10 x the coating spot diameter before and / or after the coating point, is selected, wherein the term "before" is to be understood in the sense of the relative movement vector.The coating spot diameter depends in particular on the size of the thermal spraying device and the spraying distance. For a smaller device, this coating spot diameter is preferably approximately 4 mm to 7 mm, for a larger device, preferably approximately 12 mm to 15 mm. In this case, the coolant can be distributed sufficiently well using a single cooling nozzle. Preferably, four cooling nozzles are provided in order to achieve particularly good cooling quality. In order to keep the installation space taken up by the cooling nozzles on the burner housing part within limits, preferably up to 12 cooling nozzles can be provided. In order to always maintain a sufficiently wide cooling fan with regard to a coolant, it is advantageous if the cooling nozzles are arranged at an angle to their respective central axes orMain nozzle axes each have an opening angle of 0° (parallel direction) and at most 75° or less, preferably an opening angle of 15°. Furthermore, for cooling in a thermal spraying device used as an internal coating device, it is expedient if the position of the cooling nozzle openings relative to the center axis of the thermal spraying device or the torch housing part thereof is offset from the main coating axis by at least 15° or more or by a maximum of 345° or less, preferably by 180°. By means of such a cooling device, the present thermal spraying device can be advantageously further developed, in particular by ensuring that consistently reproducible substrate body cooling can be ensured.The present substrate body cooling device alone allows a generic thermal spraying device to be advantageously further developed, so that related features or combinations of features are already advantageous without the other features of the invention. The present thermal spraying device can be further positively developed by a flame arrester device (page 22 / 68 P80839DE), wherein the flame arrester device and the burner housing part are monolithically formed. Such a monolithic design or construction allows the number of separate functional components to be kept low despite an expanded range of functions, whereby the burner housing part, in particular, can be provided in a compact manner.Such a flame arrester device is preferably arranged as a flame protection barrier in a supply line for process media, in particular for fuels such as hydrogen, in order to prevent a "flame" from the combustion chamber from flashing back critically far into the supply line. By means of the flame arrester device, the operational reliability of the thermal spraying device can be advantageously increased, in particular in view of the fact that the present thermal spraying device can, for example, have a hydrogen requirement of between 25 NL / min and 1000 NL / min at an operating pressure of approximately 5 to 25 bar. If the flame arrester device has a material mesh, in particular a thin-mesh material mesh, wherein the material mesh and the burner housing part are monolithic, the flame arrester device can be integrated extremely compactly into the burner housing part.In addition, the flame arrester device can be produced with extremely low manufacturing costs. Particularly good functional reliability can be achieved by the present flame arrester device by means of at least one of the following features: Page 23 / 68 P80839DE The material mesh preferably has a mesh size of less than or equal to 1 mm, preferably less than or equal to 0.5 mm and particularly preferably less than or equal to 0.1 mm. Furthermore, the material mesh preferably has a mesh size of greater than or equal to 0.01 mm, preferably greater than or equal to 0.1 mm and particularly preferably greater than or equal to 0.5 mm. The mesh size is to be understood as the width of the material mesh through which air can flow freely. A material mesh can also be described by its pitch, wherein the pitch describes the distance between the center of gravity of adjacent meshes of the material mesh.The material mesh can have a pitch of less than or equal to 1.2 mm, preferably less than or equal to 0.6 mm, and particularly preferably less than or equal to 0.15 mm. The material mesh can have a pitch of greater than or equal to 0.02 mm, preferably greater than or equal to 0.15 mm, and particularly preferably greater than or equal to 0.6 mm. Such a mesh size and / or pitch can be produced using an additive manufacturing process. Cumulatively or alternatively, it is advantageous if the material mesh has a base area of ​​20 mm. 2 or more, and of 700 mm 2 or less, preferably 175 mm 2. This allows the flame arrester device to be easily designed or shaped to fit different line cross-sections or similar. Page 24 / 68 P80839DE Advantageously, the base area can easily have various basic shapes using the additive manufacturing process, in particular be designed as a freeform. Preferably, the base area is circular or elliptical. However, the base area can also be rectangular, square, or similarly shaped, in particular depending on a line cross-section in the burner housing part. The base area is the cross-sectional area of ​​the flame arrester device. Cumulatively or alternatively, it is advantageous if the material braid has a length of 15 mm or more, and 90 mm or less, preferably 30 mm, whereby installation space lengths of the flame arrester device can be created as required.Furthermore, it is expedient if the flame arrester device is also designed to generate a pressure difference between 0.25 bar and 1.5 bar. In any case, a flame arrester device designed or shaped in this way enables good flame flashback protection while simultaneously ensuring good flow of a process medium. The present flame arrester device alone can advantageously further develop a generic thermal spraying device, so that related features or combinations of features are already advantageous without the other features of the invention. Furthermore, the thermal spraying device itself can be cooled particularly well if the device has internal cooling for cooling the device, wherein the cooling device and the burner housing part are of monolithic design.With this design, internal cooling can be carried out particularly efficiently, which in particular allows combustion to be optimized. This allows the present device for thermal spraying to be operated more efficiently. Heat dissipation can be advantageously designed if the internal cooling has at least one cooling channel, preferably several cooling channels, wherein the at least one cooling channel or the cooling channels and the burner housing part are formed monolithically. Furthermore, it is expedient if the at least one cooling channel is formed close to the contour, in particular close to the contour of the combustion chamber of the burner housing part and a hot gas channel of the burner housing part.The combustion chamber and / or hot gas duct have a predominantly oval wall, in particular a circular and / or elliptical wall, which geometrically delimits an interior of the combustion chamber and / or hot gas duct from any other components of the thermal spraying device. It has been shown that the wall of the combustion chamber and / or hot gas duct preferably has a consistent wall thickness, whereby the structural requirements and / or the thermodynamic equilibrium at a steady-state operating point of the thermal spraying device can be advantageously influenced. Page 26 / 68 P80839DE For the purposes of this description, "close to the contour" can therefore be understood to mean that the cooling duct is directly adjacent to the outside of the wall of the combustion chamber and / or hot gas duct, so that an advantageous cooling effect of the combustion chamber and / or hot gas duct can be achieved.In this way, the cooling channel can have a predominantly oval inner wall, in particular a circular and / or elliptical inner wall, which can extend around the wall of the combustion chamber and / or the hot gas channel. The cooling channel preferably has a predominantly uniform thickness through which air can flow freely. This allows particularly uniform heat dissipation. Even more uniform cooling of the thermal spraying device can be achieved if the at least one cooling channel is formed in a ring shape on the head part, in particular in a ring shape around the discharge nozzle. In the present case, particularly uniform cooling can be achieved on the burner housing part if the at least one cooling channel extends through the burner housing part from the inlet side to the outlet side.The heat dissipation, in particular from the burner housing part, can be further improved if the at least one cooling channel extends helically within the burner housing part, wherein in particular a cooling channel helix has at least one thread and up to 16 threads. Page 27 / 68 P80839DE The helix can have a pitch of greater than or equal to 0.05 in the direction of longitudinal extent of the combustion chamber, preferably a pitch of greater than or equal to 0.1, and particularly preferably a pitch of greater than or equal to 0.15 or greater than or equal to 0.2. Preferably, the pitch of the helix is ​​less than or equal to 9.4, preferably less than or equal to 0.35, and particularly preferably less than or equal to 0.3 or less than or equal to 0.25. Such a cooling channel helix preferably extends within the burner housing part from its inlet side to its outlet side.Depending on the application, the cooling channel helix can also be shorter, for example starting later on or only behind the inlet side of the burner housing part. The coolant can be guided more effectively within the cooling channel if the internal cooling has guide elements for guiding a coolant, wherein the guide elements and the burner housing part are formed monolithically. If guide elements extend helically within the burner housing part, the coolant can be guided helically within the burner housing part, whereby particularly uniform cooling of the burner housing part can be ensured. Such a guide element helix has at least one single thread, and the guide element helix can preferably have up to 16 threads. Such threads can be provided particularly easily within the cooling channel if the thread(s) and the burner housing part are formed monolithically.are formed. Page 28 / 68 P80839DE Furthermore, it is expedient if guide elements are arranged individually one behind the other within the burner housing part, in particular within the at least one cooling channel, wherein in particular the individually arranged guide elements each have a length of 3 mm or more and 50 mm or less. By shaping the guide elements in this way, good mixing of the coolant on its way through the burner housing part can be achieved. Additional mixing of coolant within the cooling channel can be achieved in a relatively simple design if guide elements are designed by means of a curved profile to give the coolant an additional swirling movement. The burner housing part can also be constructed compactly if guide elements have a wall thickness of 0.1 mm or more and 5 mm or less.Such dimensioning ensures, on the one hand, sufficient strength of the guide elements. On the other hand, the guide elements can be shaped delicately enough to allow the volume of the cooling channel to be as voluminous as possible. Advantageously, the internal cooling, in particular a cooling chamber provided in this way, can have an area of ​​25 mm, depending on the cooling requirement. 2 or more, preferably 34.5 mm 2 or more, or 400 mm 2 or less, preferably 330 mm 2or less. Furthermore, it should be mentioned at this point that the required coolant volume flow also depends on the inlet temperature of the coolant, particularly at the inlet side of the burner housing. The maximum permissible temperature difference between the inlet and outlet of the cooling channel must also be taken into account. This temperature difference is generally between 5°C and 30°C, depending on the burner output. Typically, a coolant flow of at least 5 l / min to a maximum of 60 l / min at a pressure of at least 1 bar to a maximum of 20 bar is required.In order to further increase the process reliability of the cooling, it is expedient if the cross-sectional area of ​​the cooling channel is shaped such that a counterpressure acting on the coolant can be generated which is greater in the region of the outlet side of the burner housing part than in the region of the inlet side of the burner housing part. In addition to an appropriate number, arrangement and / or shape of guide elements in the cooling channel, the cross-sectional area of ​​the cooling channel can cumulatively or alternatively have a smaller value in the region of the outlet side of the burner housing part than in the region of the inlet side of the burner housing part. A favorable reduction in the cross-sectional area of ​​the cooling channel is preferably 2% or more, or 30% or less, particularly preferably 20%.A suitable reduction in size can preferably be achieved by reducing the cross-section of the cooling channel, cumulatively or alternatively by widening the profile of guide elements. A reduction in the cross-section of the cooling channel can also be achieved effectively by means of a steadily steepening coolant helix or cooling channel helix in the burner housing part. Page 30 / 68 P80839DE In order to be able to reduce the size of the burner housing part or, in particular, the combustion chamber thereof, a return channel for the coolant can also be routed around hot gas-carrying components, such as the combustion chamber or the hot gas channel, in a channel of the cooling channel helix separate from a cooling channel helix, in order to thereby dissipate additional heat energy from the burner housing part. The discharge nozzle can be soldered to the head part and / or the burner housing part.In particular, the discharge nozzle can be accommodated by the head part and / or the burner housing part on the outside of the discharge nozzle, in particular to greater than or equal to 75% of an axial extent of the discharge nozzle, preferably to greater than or equal to 85%, and particularly preferably to greater than or equal to 92.5% or 96.5%. The discharge nozzle can be connected to the head part and / or the burner housing part by means of a soldered connection. To improve the cooling of the discharge nozzle, the internal cooling can extend into the region of the head part and / or the burner housing part corresponding to the discharge nozzle. Thus, a longitudinal extension area of ​​the discharge nozzle of greater than or equal to 60% of a total longitudinal extension of the discharge nozzle can be encompassed by the internal cooling of the thermal spraying device, preferably of greater than or equal to 80% and particularly preferably of greater than or equal to 90% or greater than or equal to 95%.Page 31 / 68 P80839DE In order to operate the thermal spraying device even more effectively, it is advantageous if supply lines for process media in the burner housing part are designed with continuous tangents. This allows even supply lines arranged deep in the burner housing part to be designed or shaped in a flow-optimized manner, so that the efficiency of the thermal spraying device can be further improved. This particularly applies to supply lines for process media, such as kerosene or propane, hydrogen, propane, but also compressed air, oxygen, nitrogen or the like. In particular, the interfaces of corresponding supply lines can be designed or shaped with continuous tangents. In any case, a reduction in the pressure loss in a supply line can also be achieved in this case. Depending on the respective process medium, an achievable pressure loss is preferably between 0.5 bar and approximately 5 bar.The interfaces can be designed or shaped as free-form surfaces. In this case, the supply lines can expediently be designed or shaped free of disadvantageous edges, sudden cross-sectional changes, or the like. This allows a process medium to flow as consistently as possible in the supply lines in a laminar manner. This can reduce energy consumption and allow the thermal spraying device to be operated more efficiently overall. Page 32 / 68 P80839DE Supply lines designed or shaped in this way can also improve combustion processes in the combustion chamber. Overall, the supply lines created in this way can also avoid or at least significantly reduce the risk of critical turbulence, vortices, or the like in the supply lines.A further increase in efficiency can be achieved if openings, in particular nozzle openings, of a nozzle arrangement on the combustion chamber are formed monolithically with the burner housing part. The primary injection of process media into the combustion chamber takes place, if possible, at the head end of the combustion chamber. If required, process media such as oxygen, nitrogen, compressed air or similar can also be injected into the combustion chamber as a secondary injection. Secondary openings, in particular secondary nozzle openings, of the secondary injection are located behind the primary injection in the direction of flow or in the longitudinal direction of the burner housing part. Process media are preferably injected into the combustion chamber at one point or area of ​​the burner housing part, in particular at the head end of the combustion chamber, and at a maximum of two points or areas distributed over the length of the combustion chamber.Accordingly, the primary nozzles and secondary nozzles are formed on the burner housing part, in particular on the combustion chamber. Page 33 / 68 P80839DE The injection of process media preferably takes place using a plurality of primary nozzles or secondary nozzles. In this respect, it is expedient if primary and secondary nozzles on the combustion chamber are formed monolithically with the burner housing part. In this case, openings of primary or secondary nozzles can be arranged evenly distributed on the interface of the combustion chamber, in particular concentrically around the central axis of the burner housing part. Alternatively, an opening for injecting a process medium can also be designed or formed in a ring-shaped annular gap, in particular concentrically around the central axis of the burner housing part.In order to achieve even better mixing of the process media in the combustion chamber, the relevant process media can be injected at different angles compared to a process media stream injected centrally and axially at the head end, such as kerosene or propane. While the centrally and axially injected process media stream is injected along a central axis of the burner housing part, in particular the combustion chamber, the other process media can preferably be injected helically. The different process media preferably have different gradients depending on their distance from the central axis. The gradient is preferably the same (e.g. clockwise), but can also be opposite (e.g. anticlockwise).Page 34 / 68 P80839DE This makes it possible to achieve even better mixing of the process media within the combustion chamber and thus better combustion within the combustion chamber. A generic thermal spraying device can be advantageously further developed simply by means of the primary and secondary nozzles present, so that related features or combinations of features are already advantageous without the other features of the invention. In order to further improve the combustion of process media within the combustion chamber, it is advantageous if an interface of the combustion chamber has a plurality of valleys and / or ridges, wherein the valleys and / or ridges and the burner housing part are formed monolithically. If an interface or surface of the combustion chamber orEquipped with such valleys and flutes, the injected process media can advantageously be set into rotation within the combustion chamber along the central axis of the burner housing part, thereby improving combustion. Preferably, the boundary surface of the combustion chamber, from the head side (process media inlet) of the combustion chamber to the opposite foot side (hot gas outlet) of the burner chamber, is varied in terms of its surface quality, for example by means of a continuous or sudden change in the number of valleys and flutes. Alternatively, a uniform rotation of valleys and flutes around the central axis of the burner housing part or the combustion chamber, or a discontinuous rotation of valleys and flutes around this central axis, can be arranged.Page 35 / 68 P80839DE Furthermore, a very good heat transfer into the material of the burner housing part and thus also into a cooling channel can be achieved if a boundary surface of the combustion chamber has a roughness R. a of 5 µm or more, or a roughness R a of 100 µm or less, preferably a roughness Ra of 20 µm. Such a roughness R a(average roughness Ra) can be formed particularly easily within a monolithic block-like burner housing part using an additive manufacturing process. Combustion processes in the combustion chamber can be improved simply by the measures described above, thereby reducing the release of pollutants into the environment. Overall, this can improve the efficiency of the present thermal spraying device. Furthermore, it is desirable to be able to effectively utilize the process heat generated in the combustion chamber. For this purpose, it is advantageous if a wall of the combustion chamber has a plurality of cavities, in particular pores, preferably circular pores, wherein the cavities have a diameter selected depending on the wall thickness of a combustion chamber wall. Using suitable cavities, the thermal conductivity at the interface of the combustion chamber or at the wall of the combustion chamber can be reduced., whereby the process heat within the combustion chamber can be used more efficiently. Such cavities can be created particularly easily if the cavities and the burner housing part are monolithically formed or molded. Page 36 / 68 P80839DE Furthermore, it is advantageous if the diameter of a cavity is 10% of the wall thickness or more, or 75% of the wall thickness or less, preferably 50% of the wall thickness. This can also positively improve the thermal conductivity of the burner housing part in accordance with the invention. A more uniform temperature distribution can be achieved if the cavities are evenly distributed over the surface of the combustion chamber wall. To prevent a coolant from flowing directly through the cavities, and thus preventing undesired heat dissipation, it is expedient if the cavities are arranged separately from a coolant located in a cooling channel.The above-described features regarding the cavities allow the process heat in the device to be used more efficiently. The object of the invention is further achieved by a manufacturing method for manufacturing a device for thermally spraying a coating material onto a substrate body to be coated, in which at least one burner housing part of the device is produced by means of an additive manufacturing process. As a result, the device or the burner housing part can be advantageously generated, in particular with fewer individual components, component interfaces, material usage, and is maintenance-free. Thus, the device or the burner housing part can be made smaller and overall more compact. All Page 37 / 68 P80839DE This leads to the device being able to be operated more efficiently, as already described in detail above. At this point, it is also claimed that the described methodcan also be supplemented by further technical features described here, in particular by features of the device, in order to advantageously further develop the method or to be able to represent or formulate method specifications even more precisely. According to a further aspect, the stated object of the invention also achieves a use of an additive manufacturing method for producing a burner housing part of a device for thermally spraying a coating material onto a substrate body to be coated. As a result, the burner housing part can be manufactured in a significantly more compact and flow-optimized manner, whereby the device can be operated more efficiently. It should also be noted here that, within the scope of this patent application, indefinite articles and indefinite numerical specifications such as "one...", "two...", etc., are generally to be understood as "at least one...", "at least two...", etc., provided thatIt should not be apparent from the context or the specific text of a particular passage that only "exactly one...", "exactly two...", etc., is meant there. It should also be mentioned at this point that, within the scope of this patent application, the term "in particular" should always be understood to mean that this term introduces an optional, preferred feature. The term is not to be understood as "and specifically" or "namely." Page 38 / 68 P80839DE Further advantages, details, and features of the invention will become apparent from the exemplary embodiments explained below. Components which, at least essentially, correspond in terms of their function in the individual figures, can be identified by the same reference numerals, although the components do not have to be numbered and explained in all figures. The drawing shows: Figure 1: schematically a side view of a first exemplary embodiment of theApparatus for thermal spraying in the embodiment of an external coating apparatus for thermal spraying an external coating on a substrate body; Figure 2: schematically shows a side view of a second embodiment of the apparatus for thermal spraying in the embodiment of an internal coating apparatus for thermal spraying an internal coating on a substrate body; Figure 3: schematically shows a first partial sectional view of the apparatus for thermal spraying according to the second embodiment from Figure 2; Figure 4: schematically shows a further partial sectional view of the apparatus for thermal spraying according to the second embodiment from Figure 2; Figure 5: schematically shows a partially sectioned detailed view of the apparatus for thermal spraying according to the second embodiment from Figure 2; Page 39 / 68 P80839DE Figure 6: schematically shows a detailed view of an output side of a burner housing part witha head part of the thermal spraying device according to the second embodiment from Figure 2; Figure 7: schematically shows a further detailed view of the output side of the burner housing part with the head part shown in Figure 5; Figure 8: schematically shows a perspective model view of a first exemplary internal cooling of the thermal spraying device with helically designed or formed cooling channels within the burner housing part; Figure 9: schematically shows a perspective model view of a further exemplary internal cooling of the thermal spraying device with a helically designed or formed cooling channel with a changed pitch within the burner housing part; Figure 10: schematically shows a perspective model view of a possible cooling of a head part of the thermal spraying device from Figure 2 with an annularly designed or formed cooling channel in the region shown in Figures5 and 6; and Figure 11: schematically shows a perspective model view of a connecting flange part on an inlet side of the burner housing part of the thermal spraying device. Page 40 / 68 P80839DE With the representations according to Figures 1 and 2, the device 1 proposed here for thermal spraying, in short device 1, a coating material 2 onto a substrate body 3 or 4 (often also referred to as substrate) is schematically illustrated in at least two different embodiments, namely once in the embodiment of a thermal outer coating device 1A (cf. Figure 1) for thermally spraying an outer coating 5 onto the outer side 6 of the substrate body 3 and once in the embodiment of a thermal inner coating device 1B (cf. Figure 2) for thermally spraying an inner coating 7 onto the inner side 8 of the substrate body 4. The device 1 is structurally characterized by an extremely simpleA simple and particularly compact construction, since its core, namely a burner housing part 10 (burner), is generated by an additive manufacturing process. In other words, the burner housing part 10 of the device 1, in particular, is structurally simple and monolithically formed, i.e., in the sense of the invention, with a base body made of a single monolith block 11. The additively produced burner housing part 10 accommodates, among other things, the actual combustion chamber 12, in which, to generate the actual thermal energy, different process media 14, such as kerosene or propane 14A, hydrogen 14B, oxygen 14C, or optionally nitrogen 14D, can chemically react with one another, in short, be "burned." The additively manufactured burner housing part 10 alone allows the device 1 to be built with significantly fewer components than previously customary in the prior art and thus also be manufactured much more compactly. Page41 / 68 P80839DE A more compact design with fewer components also requires, among other things, a smaller design, whereby the device 1 can be operated more thermally advantageously, in particular due to a lower consumption of process media 14, a limited loss of thermal energy to the environment 16, or the like, to mention only a few advantageous effects. The device 1 further comprises a head part 18 for discharging the coating material 2 and a connecting part 20 for the advantageous cumulative supply of process media 14. The head part 18 and the connecting part 20 can also be generated by means of an additive manufacturing process, but can also be manufactured conventionally. The head part 18 and the connecting part 20 can be firmly but detachably flanged and fastened to the burner housing part 10, for example by means of a screw connection 22 (numbered only as an example). TheThanks to this design, the device 1 can also manage with significantly fewer component interfaces 24, 26 than was previously customary in the prior art, namely with the first component interface 24 between the burner housing part 10 and the head part 18 and with a further component interface 26 between the burner housing part 10 and the connection part 20, wherein the further component interface 26 is arranged on the inlet side 28 of the burner housing part 10 and the first component interface 24 is arranged on the outlet side 30 of the burner housing part 10. At the first component interface 24, the burner housing part 12 has a receiving surface 25 for receiving the head part 18 Page 42 / 68 P80839DE, wherein the receiving surface 25 and the burner housing part 10 are designed or formed monolithically. Accordingly, the burner housing part 12 has a further receiving surface 27 at the second component interface 26 for receiving the connection part 20, wherein theAnother receiving surface 27 and the burner housing part 10 are also monolithically formed or molded. The receiving surfaces 25 and 27 are designed to be flat in such a way that the head part 18, on the one hand, and the connecting part 20, on the other hand, are sealed accordingly with all transfer areas for fluid process media. In this respect, both the head part 18 and the connecting part 20 can be detachably but firmly flanged to the burner housing part 10. The inlet side 28 and the outlet side 30 are thus formed or shaped monolithically with one another, in particular as the single monolith block 11. Advantageously, transition regions 32, 34 between the combustion chamber 12 and the inlet side 28 and the outlet side 30 are also formed or shaped monolithically, namely inlet-side transition regions 32 (numbered only as an example) on the inlet side 28 and outlet-side transition regions 34 (numbered only as an example) onthe output side 30. This also allows the device 1 to be constructed much more compactly, whereby it can be operated more efficiently, as already described above. Page 43 / 68 P80839DE Alternatively, it is also possible for the head part 18 and / or the connection part 20 to be formed or molded in one piece with the burner housing part 10, thus forming a monolithic unit with each other. This allows the number of possible component interfaces 24 or 26 to be further reduced. However, the assembly solutions can often be considered more advantageous since, for example, the head part 18 is subject to greater wear and tear and can therefore be easily replaced. Thus, a burner housing part 10 can remain in operation much longer if it can be equipped with a new head part 18. With the replaceable connection part 20, the device 1 can be more easily configured for different operating modes, which can also be changed by the supply ofdifferent process media 14. In this respect, the replaceable connection part 20 can provide different connection options compactly and easily on the device 1 or on its burner housing part 10. The connection part 20 shown here has connections (not explicitly shown here) for the following process media 14: kerosene or propane 14A, hydrogen 14B, oxygen 14C, nitrogen 14D, internal coolant 14E, external cooling air 14E and particles 14G for the coating material 2. The device 1 has a central longitudinal axis 36, along which the device 1, but also the burner housing part 10, extends with its respective longitudinal extent 38. The illustrations in Figures 3 to 11 show the structure of individual components of the device 1, such as the burner housing part 10, the head part 18 and also the connection part 20, page 44 / 68 P80839DE, as an example of the design of theThe thermal internal coating device 1B (see Figure 2) is described in more detail below. The description is largely also applicable to the design of the thermal external coating device 1A (see Figure 1), but is not shown again in detail here with further illustrations to avoid repetition. According to the various sectional views, particularly according to Figures 3 and 4, the device 1 is shown in more detail by way of example and described below. The sectional views according to Figures 3 and 4 clearly show that the burner housing part 10 has a plurality of material recesses 40, particularly internal material recesses 40, which, due to the additive manufacturing process used, can be designed or formed in almost any desired manner, in particular with extremely high flow optimization. This also leads to more efficient operation of the proposed device 1.This is due, among other things, to the fact that almost all boundary surfaces 42 (numbered only as an example) of the material recesses 40 can be designed or formed to be tangent-continuous with respect to their spatial extents, in particular at transitions 44 (numbered only as an example). With regard to the transitions 44, only the transition 44 at the combustion chamber 12 between the pre-combustion chamber 12A and the main combustion chamber 12B is numbered as an example. In particular, the boundary surfaces 42 can be generated as free-form surfaces (not explicitly numbered again), which is generally not possible with conventional manufacturing processes, especially in the case of internal surfaces 46 (numbered only as an example) Page 45 / 68 P80839DE of a component formed as a monolith block 11, such as in particular the present burner housing part 10. Advantageously, interfaces 42 of the material recesses 40 and the burner housing part 10 are formed or formed monolithically. In addition,or within the material recesses 40, a wide variety of structures 48 can be arranged or formed to produce additional effects, as will be described in more detail later, wherein the structures 48 and the burner housing part 10 are monolithic. Adjoining the combustion chamber 12, in particular its main combustion chamber 12B, is a hot gas duct 50, via which the hot process gas (not numbered) produced during the combustion of process media 14, such as in particular the kerosene or propane 14A or the hydrogen 14B, is discharged from the combustion chamber 12 into the environment 16. The hot gas duct 50 has a curved section 52 on the outlet side 30 in order to be able to deflect the hot process gas by 90° within the burner housing part 10, so that it can exit the device 1 via the head part 18 into the environment 16. The hot gas channel 50, in particular with its curved section 52, and the combustion chamber 12 or theBurner housings 12 are monolithically formed or molded. On the inlet side 29 of the burner housing part 10, on the one hand, supply lines 54 to the combustion chamber 12 are arranged, such as a primary fuel supply line 54A for supplying kerosene or propane 14A, a secondary fuel supply line 54B for supplying hydrogen 14B, and an oxygen supply line 54C for supplying oxygen 14C, whereby these can be monolithically formed or molded with the burner housing part 10. On the other hand, on the inlet side 28, in the sense of the supply lines 54, a cooling channel 54E for supplying an internal coolant 14E for internal cooling and a cooling air channel 54F for supplying cooling air 14F for external cooling of the base body 4 to be coated are also formed. In addition, the inlet side 28 forms a holder 58 for an injector tube part 54G for supplying particles 14G. The primary fuel supply line 54A, the secondary fuel supplyThe inlet side 28, the oxygen supply line 54C, the cooling channel 54E, the cooling air channel 54F, and also the holder 58 are formed or shaped monolithically with the inlet side 28 and thus also with the burner housing part 10 or with the combustion chamber 12. Alternatively, the injector tube part 54G can also be formed or shaped monolithically with the burner housing part 10. The primary fuel supply line 54A opens into the combustion chamber 12 via a single injection nozzle 60, wherein the injection nozzle 60 and the combustion chamber 12 or the burner housing part 10 are formed or shaped monolithically. The secondary fuel supply line 54B opens into the combustion chamber 12 with a plurality of other injection nozzles 62 (numbered only as examples), whereby the other injection nozzles 62 and the combustion chamber 12 or the burner housing part 10 are monolithically formed or shaped. Page 47 / 68 P80839DE The other injection nozzles 62 are concentrically and evenly distributed.arranged around the injection nozzle 60 or around the longitudinal center axis 36. The oxygen supply line 54C opens into the combustion chamber 12 with two annular gap nozzles 64 and 66, wherein the two annular gap nozzles 64, 66 and the combustion chamber 12 or the burner housing part 10 are monolithically formed or formed. Here, the two annular gap nozzles 64 and 66 are arranged concentrically around the injection nozzle 60 or around the longitudinal center axis 36, wherein the outer annular gap nozzle 66 is additionally arranged concentrically around the inner annular gap nozzle 64. Overall, a nozzle arrangement 67 can be formed particularly advantageously on the burner housing part 10 with the injection nozzles 60, 62 and annular gap nozzles 64 and 66 or their circular or annular openings (not numbered again), wherein the nozzle arrangement 67 and the burner housing part 10 are formed or formed monolithically. In this embodiment, the cooling channel 54E is designed as a cooling ring channel (not numbered again).The cooling channel 54E or the cooling ring channel extends from the inlet side 28 in a ring shape around and along the combustion chamber 12 to the outlet side 30 around and along the hot gas channel 50 and further in a ring shape into the head part 18, where it also encloses the discharge nozzle 68 of the device 1. The cooling channel 54E or the cooling ring channel and the combustion chamber 12 or the burner housing part 10 are formed or shaped monolithically. Page 48 / 68 P80839DE This monolithic shape or construction allows the cooling capacity to be increased and the device 1 can be cooled very evenly overall, whereby the operation of the device 1 can also be realized much more efficiently overall. In order to further improve the cooling performance, the cooling channel 54E or the cooling ring channel has a number of guide elements 70 (numbered only as examples) as structures 48. These guide elements 70 can be provided with differentGuide geometries can be implemented, for example as guide vane elements, as guide fin elements, as guide helix elements 70A, 70b, 70C (see Figure 8) or 98 (see Figure 9), or the like. By means of such guide elements 70, a coolant flowing in the cooling channel 54E can be guided more effectively through this same cooling channel 54E, for example in the form of a coolant helix 72 (see Figures 8 and 9), whereby the internal coolant 14E is better mixed, thereby avoiding in particular "dead water areas" and the cooling performance on the device 1 or specifically along the burner housing part 10 can be evened out and overall further improved. By means of the cooling channel 54E and in particular also by means of the guide elements 70 formed therein, a particularly effective internal cooling 74 can be realized on the device 1 and in particular on the burner housing part 10, wherein the internal cooling 74 and the burner housing part 10 are formed monolithically.Preferably, the internal cooling 74 is designed as a circulation system (not shown here in detail and numbered) or is formed in particular in the burner housing part 10, wherein, for implementing the circulation system, a corresponding return channel 75 (shown only as an example) for returning the heated internal coolant 14E is formed specifically in the burner housing part 10. The return channel 75 and the burner housing part 10 are designed or formed together monolithically. The cooling air channel 54F extends in the burner housing part 10 from its inlet side 28 to its outlet side 30, and the cooling air channel 54F ends at the outlet side 30 in four cooling nozzles 80 (see in particular Figures 6 and 7) for spraying coolant in the form of cooling air, wherein the cooling nozzles 80 and the burner housing part 10 are monolithic. The cooling nozzles 80 each have a main spray axis 81, alonginto which the coolant is sprayed from the cooling nozzles 80. The cooling air duct 54F and the cooling nozzles 80 together constitute a cooling device 82 for cooling the substrate body 4 on the device 1 and in particular on the burner housing part 10, wherein the cooling device 82, or at least regions thereof, and the burner housing part 10 are formed monolithically. The injector tube part 54G also extends from the inlet side 28 to the outlet side 30 and ends in an injector element 84 of the head part 18, by means of which the particles 14G can be introduced into the discharge nozzle 68 essentially orthogonal to a main coating axis 86. At this point it should also be mentioned that the connecting part 20 is designed and in particular shaped in such a way that the process media required to operate the device 1 Page 50 / 68 P80839EN 14 at the further component interface 26 into the corresponding supply lines 54 of theBurner housing part 10 can be transferred in an operationally safe manner. According to the illustration in Figure 5, the inlet side 28 of the burner housing part 10 is shown again in an enlarged scale, although not all reference numerals need to be shown here either. In particular, the primary fuel supply line 54A with its injection nozzle 60, the secondary fuel supply line 54B with its injection nozzles 62, the oxygen supply line 54C with its two annular gap nozzles 64 and 66, and the annular cooling channel 54E are easier to see. With regard to the secondary fuel supply line 54B, a flame arrester device 63 can also be seen in this illustration, which is arranged as a thin-mesh material braid 63A, monolithically formed immediately from the burner housing part 12, within the secondary fuel supply line 54B. By means of the thin-mesh material mesh 63A within the secondary fuel supply line 54B, the risk can be eliminated or reduced thatThe hydrogen 14B already ignites critically in the secondary fuel supply line 54B, whereby the flame arrester device 63, in particular the thin-mesh material braid 63A, and the burner housing part 10 are monolithic. The thin-mesh material braid 63A has a base area (not separately numbered), the diameter of which depends on the cross-sectional area (not numbered) of the secondary fuel supply line 54B. Here, the base area has a dimension of 175 mm 2also circular in shape. Page 51 / 68 P80839DE Furthermore, the thin-mesh material braid 63A has a length of 30 mm, seen in the longitudinal extension 38 of the burner housing part 10 and thus also in the longitudinal extension 38 of the secondary fuel supply line 54B. Furthermore, according to the illustration in Figure 5, a wall 10A of the combustion chamber 12 in the burner housing part 10 is shown in more detail by way of example, more precisely an inner wall 10A between the interface 42 of the combustion chamber 12 and the cooling channel 54E. In particular, this inner wall 10A has a plurality of cavities 10B (shown only schematically). The cavities 10B have a diameter (not explicitly shown) which, in this embodiment, amounts to 50% of the wall thickness 10C of the wall 10A. This allows the process energy generated in the combustion chamber 12 to be used more effectively. Are the cavities 10B uniformly distributed over the surface orBy distributing the cavities 10B over the boundary surface 42 of the wall 10A of the combustion chamber 10, a particularly uniform heat distribution on the burner housing part 12 can be achieved. The cavities 10B can be designed or shaped differently in the material of the burner housing part 12. The cavities 10B are preferably designed or shaped as circular or spherical pores (not separately numbered again). On the one hand, the cavities 10B can thereby be generated with the largest and most homogeneous surface possible in the burner housing part 10. Page 52 / 68 P80839DE On the other hand, forces and stresses occurring in the wall 10A can continue to be absorbed or transmitted within the burner housing part 10 in a well-tolerated manner. Overall, the present cavities 10B make it possible to construct the burner housing part 10 in a more energy-efficient and compact manner, whereby the device 1 can also be operated more efficiently.According to the illustrations in Figures 6 and 7, the outlet side 30 of the burner housing part 10 is shown again with the head part 18 attached thereto. The head part 18 is flanged to the bottom of the receiving surface 25 of the burner housing part 10, with the main coating axis 86 of the discharge nozzle 68 running orthogonal to the central longitudinal axis 36 of the device 1 or the burner housing part 10. The discharge nozzle 68 marks the front side 90 of the device 1 or the burner housing part 10, while the four cooling nozzles 80 are arranged on the rear side 92 of the device 1 or the burner housing part 10, in such a way that their respective main discharge axes 81 run at an angle of incidence α = 45° to an orthogonal line 94 of the central longitudinal axis 36. The four cooling nozzles 80 are arranged parallel to each other.According to the illustration in Figure 8, with regard to the guide elements 70, an alternative guide geometry for internal cooling 74 is schematically illustrated in connection with the combustion chamber 12 of the burner housing part 10, namely in the form of a monolithic arrangement of triple guide helix elements 70A, 70B Page 53 / 68 P80839DE and 70C, by means of which three separate cooling channels 54E (numbered only as an example) are formed along the central longitudinal axis 36 of the burner housing part 10. The three guide helix elements 70A, 70B and 70C each extend helically from the inlet side 28 of the burner housing part 10 to the outlet side 30 of the burner housing part 10 and preferably also into the head part 18. The three guide helix elements 70A, 70B and 70C each have, viewed in the longitudinal extension 38, 16 successively arranged threads 96 (numbered only as an example) orwindings which cylindrically enclose the combustion chamber 12 and the adjoining hot gas channel 50 and are guided further around the discharge nozzle 68 placed in the head part 18. By means of the three guide helix elements 70A, 70B and 70C, particularly uniform and good cooling can be achieved, especially towards the combustion chamber 12 and the hot gas channel 50 in the burner housing part 10 and the discharge nozzle 68 in the head part 18. The three guide helix elements 70A, 70B and 70C are once again designed or formed as suitably shaped guide elements 70 with the burner housing part 10 monolithically in such a way that the burner housing part 10 has three spatially separated cooling channels 54E. A similar effect can alternatively be achieved by means of suitably designed orshaped guide vane elements (not shown), which are arranged individually from one another and extend helically in the burner housing part 10 around the combustion chamber 12 and the hot gas channel 50, each with a length of, for example, 3 mm to 50 mm. Page 54 / 68 P80839DE These individually arranged guide vane elements can form annular regions in a corresponding cooling channel 54E, along which the coolant 54E can be guided through the cooling channel 54E. For example, two such guide vane elements can be provided per annular region (turn or flight 96). Depending on the design of the guide geometry, up to 20 such annular regions can be formed monolithically by means of the burner housing part 10. The axial distance between the individual ring areas or their guide vane elements is preferably from 0.5 mm, for example in the longitudinal extension 38 of the burner housing part 10.An axial overlap of ring regions can be advantageous for design reasons. In any case, the radial offset should be selected uniformly depending on the number of ring regions in order to achieve the most uniform flow conditions possible in the cooling channel 54E and thus also uniform cooling overall. These guide vane elements, which are arranged individually relative to one another, preferably also have a curved profile so that the coolant 14E experiences additional swirl when flowing over the correspondingly profiled surfaces of the guide vane elements. Alternatively, surface profiles other than the curved profile can also be formed on a guide element 70 in order to be able to additionally set the coolant 14E into rotation along its flow direction in the cooling channel 54E.Page 55 / 68 P80839DE Preferably, three guide helix elements 70A, 70B, and 70C extend from the inlet side 28 of the burner housing part 10 to the outlet side 30 of the burner housing part 10. According to the illustration in Figure 9, for implementing a different internal cooling 74 with respect to guide elements 70, a further alternative guide geometry is schematically illustrated in connection with the combustion chamber 12 of the burner housing part 10, namely in the form of a single guide helix element 98, which has a varying pitch (not numbered) along the central longitudinal axis 36 of the burner housing part 10. The single guide helix element 98 preferably extends from the inlet side 28 of the burner housing part 10 to its outlet side 30.At this point, it should also be mentioned that, cumulatively or alternatively, guide elements 70 can be configured by means of a curved profile (not shown) to additionally impart a swirling motion to the coolant, whereby the coolant can be mixed even more intensively. The coolant can be implemented as normal cooling water, as a cooling emulsion, as a cooling mixture thereof, or the like. According to the illustration in Figure 10, the head part 18 of the device 1 is again shown in a partially sectioned view, wherein it can be clearly seen how the discharge nozzle 68 is seated in the head part 18, surrounded by the cooling channel 54E. The cooling channel 54E opens within the head part 18 into two return ports 102 and 104, by means of which the heated coolant 14E can be transferred into the return channel 75 of the burner housing part 10.Page 56 / 68 P80839DE According to the illustration in Figure 11, the burner housing part 10 is shown again with regard to its inlet side 28 and the supply lines 54 formed therein in a tangential manner, such as the primary fuel supply line 54A for supplying kerosene or propane 14A, the secondary fuel supply line 54B for supplying hydrogen 14B, the oxygen supply line 54C for supplying oxygen 14C, the cooling channel 54E for supplying an internal coolant 14E for internal cooling, the cooling air channel 54F for supplying cooling air 14F for external cooling of the base body 4 to be coated and the return channel 75 for returning or discharging the heated internal coolant 14E. By means of a tangentially inclined shape, the supply lines 54 can be designed or shaped in a flow-technically advantageous manner, whereby a more loss-free flow of the process media can be achieved.

[0002] Page 57 / 68 P80839DE List of reference symbols 1 Devices for thermal spraying 1A Design of an external coating device 1B Design of an internal coating device 2 Coating material 3 Base body 4 Further base body 5 External coating 6 Outside 7 Internal coating 8 Inside 10 Burner housing part 10A Wall orinner wall 10B cavities 10C wall thickness 11 monolith block 12 combustion chamber 12A pre-combustion chamber 12B main combustion chamber 14 process media 14A kerosene or propane 14B hydrogen 14C oxygen 14D nitrogen 14E internal coolant 14F cooling air 14G particles (coating material) 16 environment 18 head part 20 connection part 22 screw connections 24 first component interface 25 receiving surface 26 further component interface Page 58 / 68 P80839EN 27 further receiving surface 28 input side 30 output side 32 input-side transition areas 34 output-side transition areas 36 central longitudinal axis 38 longitudinal extension 40 material recesses 42 interfaces 44 transitions 46 surfaces 48 structures 50 hot gas channel 52 curved section 54 supply lines 54A Primary fuel supply line 54B Secondary fuel supply line 54C Oxygen supply line 54E Cooling duct or cooling ring duct 54F Cooling air duct 54G Injector pipe section 58 Bracket 60 Injector nozzle or primary fuel nozzle 62 Other injectors orSecondary fuel nozzle 63 Flame arrester device 63A Material braid 64 Inner annular gap nozzle 66 Outer annular gap nozzle 67 Nozzle arrangement 68 Discharge nozzle 70 Guide elements 70A First guide helix element 70B Second guide helix element 70C Third guide helix element 72 Coolant helix or cooling channel helix Page 59 / 68 P80839EN 74 Internal cooling 75 Return channel 80 Cooling nozzles 81 Main nozzle axes 82 Cooling device 84 Injector element 86 Main coating axis 90 Front side 92 Rear side 94 An orthogonal 96 Threads 98 Single guide helix element 102 First return nozzle 104 Second return nozzle α Angle of attack.

Claims

Page 60 / 68 P80839DE Patent claims 1. Device (1; 1A; 1B) for thermally spraying a coating material (2) onto a substrate body (3; 4) to be coated, with a burner housing part (10) having a combustion chamber (12; 12A, 12B), an inlet side (28) for supplying process media (14, 14A, 14B, 14C, 14D, 14E, 14F, 14G), and an outlet side (30) for discharging a process hot gas, wherein the burner housing part (10) is generated by means of an additive manufacturing process.

2. Device (1; 1A; 1B) according to claim 1, characterized in that the burner housing part (10) is monolithic, in particular as a single monolith block (11).

3. Device (1; 1A; 1B) according to claim 1 or 2, characterized in that the input side (28) and the output side (30) are formed monolithically with one another. 4.Device (1; 1A; 1B) according to one of claims 1 to 3, characterized in that transition regions (32, 34) between the combustion chamber (10) and the inlet side (28) as well as the outlet side (30) are monolithic.

5. Device (1; 1A; 1B) according to one of claims 1 to 4, characterized in that the burner housing part (10) has material recesses (40), in particular internal material recesses (40), wherein interfaces (42) of the material recesses (40) and the burner housing part (10) are monolithic.

6. Device (1; 1A; 1B) according to one of claims 1 to 5, characterized in that structures (48) are arranged on or within material recesses (40) of the burner housing part (10), wherein the structures (48) and the burner housing part (10) are formed monolithically. Page 61 / 68 P80839DE 7. Device (1; 1A; 1B) according to one of claims 1 to 6, characterized in that the inlet side (28) has a first supply line (54A) for a primary fuel (14A), wherein the first supply line (54A) and the combustion chamber (12) are monolithic.

8. Device (1; 1A; 1B) according to one of claims 1 to 7, characterized in that the inlet side (28) has further supply lines (54B, 54C, 54E, 54F, 54G) for further process media (14, 14B, 14C, 14D, 14E, 14F, 14G), wherein the further supply lines (54B, 54C, 54E, 54F, 54G) and the combustion chamber (12) are monolithic.

9. Device (1; 1A; 1B) according to one of claims 1 to 8, characterized in that the outlet side (30) has a hot gas channel (50), wherein the hot gas channel (50) and the combustion chamber (12) are monolithic. 10.Device (1; 1A; 1B) according to claim 9, characterized in that the hot runner (50) has at least one curved section (52).

11. Device (1; 1A; 1B) according to one of claims 1 to 10, characterized in that supply lines (54, 54A, 54B, 54C, 54E, 54F, 54G) for supplying process media (14, 14A, 14B, 14C, 14D, 14E, 14F, 14G) on the inlet side (28) of the burner housing part (10) and a hot gas duct (50) for discharging a process hot gas on the outlet side (30) of the burner housing part (10) are monolithically formed.

12. Device (1; 1A; 1B) according to one of claims 1 to 11, characterized in that the device (1; 1A; 1B) has a head part (18) with a discharge nozzle element (68) and with an injector element (84) for injecting coating material (2) into the head part (18), wherein the head part (18) is manufactured by means of an additive manufacturing process. Page 62 / 68 P80839DE 13. Device (1; 1A; 1B) according to claim 12, characterized in that the head part (18) and the burner housing part (10) are monolithic, in particular as a single monolithic block (11).

14. Device (1; 1A; 1B) according to claim 12, characterized in that the head part (18) and the burner housing part (10) are firmly but detachably connected to one another.

15. Device (1; 1A; 1B) according to claim 14, characterized by a receiving surface (25) for receiving the head part (18), wherein the receiving surface (25) and the burner housing part (10) are monolithic. 16.Device (1; 1A; 1B) according to one of claims 1 to 15, characterized in that the device (1; 1A; 1B) has an injector tube part (54G) for providing coating material (2) to an injector element (84) of a head part (18) of the device (1; 1A; 1B), wherein the burner housing part (10) forms a holder (58) for holding the injector tube part (54G).

17. Device (1; 1A; 1B) according to one of claims 1 to 16, characterized by a cooling device (82) for cooling the substrate body (4), wherein the cooling device (82) or at least regions thereof and the burner housing part (10) are monolithic. 18.Device (1; 1A; 1B) according to claim 17, characterized in that the cooling device (82) has at least one coolant channel (54F) for guiding coolant (14F), which extends in particular from the inlet side (28) of the burner housing part (10) to the outlet side (30) of the burner housing part (10), wherein the at least one coolant channel (54F) and the burner housing part (10) are formed monolithically. Page 63 / 68 P80839DE 19. Device (1; 1A; 1B) according to claim 17 or 18, characterized in that the cooling device (82) has at least one cooling nozzle (80) for spraying out coolant, which is arranged in particular on the outlet side (30) of the burner housing part (10), wherein the at least one cooling nozzle (80) and the burner housing part (10) are monolithic.

20. Device (1; 1A; 1B) according to one of claims 1 to 19, characterized by a flame arrester device (63), wherein the flame arrester device (63) and the burner housing part (10) are monolithic.

21. Device (1; 1A; 1B) according to claim 20, characterized in that the flame arrester device (63) comprises a material mesh (63A), in particular a thin-meshed material mesh (63A), wherein the material mesh (63A) and the burner housing part (10) are monolithic. 22.Device (1) according to claim 20 or 21, characterized in that the material mesh (63A) has a mesh size of less than or equal to 1 mm, preferably less than or equal to 0.5 mm and particularly preferably less than or equal to 0.1 mm.

23. Device (1; 1A; 1B) according to one of claims 20 to 22, characterized in that the material mesh (63A) has a base area of ​​20 mm. 2 or more, and of 700 mm 2 or less, preferably 175 mm 2 , wherein in particular the base area is circular.

24. Device (1; 1A; 1B) according to one of claims 20 to 23, characterized in that the material mesh (63A) has a length of 15 mm or more, and of 90 mm or less, preferably of 30 mm.

25. Device (1; 1A; 1B) according to one of claims 1 to 24, characterized by an internal cooling (74) for cooling the Page 64 / 68 P80839DE Device (1; 1A; 1B), wherein the internal cooling (74) and the burner housing part (10) are monolithic.

26. Device (1; 1A; 1B) according to claim 25, characterized in that the internal cooling (74) has at least one cooling channel (54E), preferably a plurality of cooling channels (54E), wherein the at least one cooling channel (54E) or the cooling channels (54E) and the burner housing part (10) are monolithic.

27. Device (1; 1A; 1B) according to claim 26, characterized in that the at least one cooling channel (54E) is formed close to the contour, in particular close to the contour around the combustion chamber (10) of the burner housing part (10) and a hot gas channel (50) of the burner housing part (10), in particular annularly around the combustion chamber (10) of the burner housing part (10) and a hot gas channel (50) of the burner housing part (10). 28.Device (1; 1A; 1B) according to claim 26 or 27, characterized in that the at least one cooling channel (54E) is formed in a ring shape on the head part (18), in particular in a ring shape around the discharge nozzle (68).

29. Device (1; 1A; 1B) according to one of claims 26 to 28, characterized in that the at least one cooling channel (54E) extends from the inlet side (28) to the outlet side (30) through the burner housing part (10).

30. Device (1; 1A; 1B) according to one of claims 26 to 29, characterized in that the at least one cooling channel (54E) extends helically within the burner housing part (10), wherein in particular a cooling channel helix (72) has at least one flight (96) and up to 16 flights (96).

31. Device (1; 1A; 1B) according to one of claims 25 to 30, characterized in that the internal cooling (74) conductive elements. Page 65 / 68 P80839DE elements (70) for conducting a coolant, wherein the guide elements (70) and the burner housing part (10) are monolithically formed.

32. Device (1; 1A; 1B) according to claim 31, characterized in that guide elements (70) extend helically within the burner housing part (10), wherein in particular a guide element helix (70A, 70B, 70C; 98) has at least one single thread (96) and up to 16 threads (96).

33. Device (1; 1A; 1B) according to claim 31, characterized in that guide elements (70) are arranged individually one behind the other within the burner housing part (10), in particular within the at least one cooling channel (54E), wherein in particular the individually arranged guide elements (70) each have a length of 3 mm or more and of 50 mm or less. 34.Device (1; 1A; 1B) according to one of claims 31 to 33, characterized in that guide elements (70) are configured by means of a curved profile to impart an additional swirling movement to the coolant (54E).

35. Device (1; 1A; 1B) according to one of claims 31 to 34, characterized in that guide elements (70) have a wall thickness of 0.1 mm or more and 5 mm or less.

36. Device (1; 1A; 1B) according to one of claims 1 to 35, characterized in that supply lines (54, 54A, 54B, 54C, 54E, 54F, 54G) for process media (14, 14A, 14B, 14C, 14D, 14E, 14F, 14G) in the burner housing part (10) are formed with continuous tangents.

37. Device (1; 1A; 1B) according to one of claims 1 to 36, characterized in that openings (60, 62, 64, 66), in particular nozzle openings (60, 62, 64, 66), of a nozzle arrangement. Page 66 / 68 P80839DE (67) on the combustion chamber (12) are formed monolithically with the burner housing part (10).

38. Device (1; 1A; 1B) according to one of claims 1 to 37, characterized in that primary and secondary fuel nozzles (60, 62) on the combustion chamber (12) are formed monolithically with the burner housing part (10).

39. Device (1; 1A; 1B) according to one of claims 1 to 38, characterized in that an interface (42) of the combustion chamber (10) has a plurality of valleys and / or ridges, wherein the valleys and / or ridges and the burner housing part (10) are formed monolithically.

40. Device (1; 1A; 1B) according to one of claims 1 to 39, characterized in that a boundary surface (42) of the combustion chamber (10) has a roughness R a of 5 µm or more, or a roughness R a of 100 µm or less, preferably a roughness R aof 20 µm.

41. Device (1; 1A; 1B) according to one of claims 1 to 39, characterized in that a wall (10A) of the combustion chamber (10) has a plurality of cavities (10B), in particular pores, preferably circular pores, wherein the cavities (10B) have a diameter which is selected in particular as a function of a wall thickness (10C) of a wall (10A) of the combustion chamber (10).

42. Device (1; 1A; 1B) according to claim 41, characterized in that the diameter of a cavity (10B) is 10% of the wall thickness (10C) or more, or 75% of the wall thickness (10C) or less, preferably 50% of the wall thickness (10C).

43. Device (1; 1A; 1B) according to claim 41 or 42, characterized in that the cavities (10B) are arranged distributed uniformly over the surface (42) of the wall (10A) of the combustion chamber (10). Page 67 / 68 P80839DE 44. Device (1; 1A; 1B) according to one of claims 1 to 36, characterized in that the cavities (10B) are arranged separately from a coolant (14E) located in a cooling channel (54E).

45. Manufacturing method for manufacturing a device (1; 1A; 1B) for thermally spraying a coating material onto a substrate body (3; 4) to be coated, in particular the device (1; 1A; 1B) for thermal spraying according to one of the preceding claims, in which at least one burner housing part (10) of the device (1; 1A; 1B) is produced by means of an additive manufacturing process.

46. ​​Use of an additive manufacturing method for producing a burner housing part (10) of a device (1; 1A; 1B) for thermally spraying a coating material (2) onto a substrate body (3; 4) to be coated.

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