DE102023117801A1 - Bell cup unit and method for manufacturing - Google Patents

Abstract

The invention relates to a bell plate unit (100) for a high-speed rotary atomizer unit for generating spray jets for applying paints to surfaces of components, such as vehicle body components, and to a high-speed rotary atomizer unit with a bell plate unit (100). The bell plate unit 100 comprises a shell unit (1), which is essentially made of a first material (2), and a receiving unit (3) for receiving the bell plate unit (100) on at least one drive unit, wherein the receiving unit (3) is essentially made of a second material (4). The shell unit (1) and the receiving unit (3) are firmly connected to one another in a material-locking manner. The invention further relates to a method for producing a bell cup unit (100), in which a first body (A) is constructed by additive manufacturing, which is essentially formed by a first material (2), and wherein a second body (B) which is integrally connected to the first body (A) is constructed by additive manufacturing, wherein the second body (B) is essentially formed from a second material (4).

Description

The present invention relates to a bell cup unit for a high-speed rotary atomizer unit for generating spray jets, for example for applying paints to surfaces of components, such as vehicle body components, vehicle attachments in the interior, in particular interior, and in the exterior, in particular exterior, as well as components from the industrial sector, with a shell unit, in particular with a paint running surface, and a receiving unit. The invention further relates to a high-speed rotary atomizer unit with a bell cup unit and a method for producing a bell cup unit.

In modern painting systems for painting motor vehicle body components, rotary atomizers are usually used as application devices. These have a rapidly rotating bell plate that transfers the paint to be applied into lamellae due to the centrifugal forces acting on the paint, which then atomize into droplets.

On the one hand, when designing such bell cups, the aim is to achieve the lowest possible weight in order to reduce the mechanical loads that the bell cup exerts on the bearing unit, for example, due to the high speed of up to 100,000 rpm. In addition, the lowest possible weight of the bell cup is also advantageous in order to shorten the time for braking and accelerating the bell cup and thus increase process reliability and efficiency.

On the other hand, the design of the bell cup must be sufficiently stable, and in particular speed-resistant, so that the materials used must have sufficient wear resistance and hardness. Conventional bell cups are therefore usually made of titanium or aluminum in order to achieve sufficient strength with the lowest possible weight.

In this context, composite bell cups have also become known, which have a material combination of a light material with relatively low strength and a heavy material with high strength in order to achieve a bell cup with the lowest possible weight and the greatest possible strength. The composite bell cups therefore consist of several components made of different materials, with the various components being connected to one another during assembly.

However, even such composite bell cups do not represent a satisfactory compromise between the design goals of the lowest possible weight on the one hand and the highest possible strength on the other.

The invention is therefore based on the object of creating a bell plate and a manufacturing method for a bell plate that has the greatest possible mechanical strength with the lowest possible weight. In addition, physical requirements such as cleanability, wettability, hardness and electrical conductivity should also be combined and reproducibility with regard to the balance quality and concentricity of the overall system should be improved.

The object is achieved by a bell cup unit with the features of claim 1 and a high-speed rotary atomizer unit with the features of claim 12 and by a method for producing a bell cup unit with the features of claim 13. Preferred developments are the subject of the subclaims. Further properties and advantages are the subject of the general description and the description of the embodiments.

The bell plate unit according to the invention for a high-speed rotary atomizer unit for generating spray jets, in particular for applying paints to surfaces of components, such as vehicle body components, comprises a shell unit, in particular with a paint running surface, for generating spray jets, which is essentially made of a first material and at least one receiving unit for receiving the bell plate unit on at least one drive unit, wherein the receiving unit is essentially made of a second material. The shell unit and the receiving unit are firmly connected to one another in a material-locking manner.

In particular, the material-locking connection is formed over a maximum diameter or a maximum possible cross-sectional area of the shell unit and/or the receiving unit, between the receiving unit and the shell unit. Preferably, the receiving unit and the shell unit have at least partially congruent and preferably congruent cross-sections at a transition or within a transition area between the receiving unit and the shell unit. Alternatively or additionally, the receiving unit and the shell unit can also at least partially have a force-locking and/or form-locking connection.

The invention has many advantages. A significant advantage of the invention is that the material A mechanical, high-strength and resilient bell plate unit is provided for a coherent and firm connection between the receiving unit and the shell unit. This advantageously results in power being transmitted over or through the maximum available diameter or the maximum possible available cross-sectional area. The existing stresses at the transition between the bell unit and the receiving unit are therefore minimal. As a result, the required diameters and cross-sectional areas at a transition can be reduced, so that the overall weight can be further reduced. This also means that less power is required for the drive. At the same time, the materials of the shell unit and the receiving unit can be optimally selected for the respective task or the circumstances. Another advantage is that the load on the bearing can be reduced.

The material-locking connection can also prevent any relative twisting or other relative positional changes between the receiving unit and the shell unit during operation, which could occur, for example, due to joining tolerances in multi-part rotary atomizers. Advantageously, effects resulting from such a relative positional change, such as a change in balancing, cannot occur.

The bell cup unit preferably has a rotationally symmetrical structure and can rotate about a rotation axis. The bell cup unit can preferably rotate about the rotation axis at a high speed of at least 2000 rpm or 5000 rpm or 10000 rpm or 30000 rpm or 50000 rpm or 70000 rpm or 100000 rpm or even higher speeds. The operating speeds are preferably mainly between 15000 rpm and 80000 rpm. The receiving unit and the shell unit advantageously have at least one feed opening along the rotation axis through which a viscous fluid such as a paint can be fed to the shell unit. The feed opening can have a conical, cylindrical or even discontinuous cross-sectional area. In particular, the shell unit comprises at least one paint running surface, preferably designed as a widening section to which a viscous fluid, such as a varnish or a liquid paint, can be applied. The widening section can preferably have, for example, a conical shape or a shape which, at least in sections, preferably corresponds to one or more functions, in particular a non-linear function, such as an exponential function. Viscous fluid applied to the rotating shell unit expediently moves outwards due to inertia and detaches itself as a spray jet from a tear-off edge at an outer radial end of the shell unit. The receiving unit is preferably arranged at an end of the bell cup unit opposite the tear-off edge along the axis of rotation.

Advantageously, at least the shell unit and/or the receiving unit, in particular each, is manufactured by an additive manufacturing process. Preferably, the bell cup unit is manufactured by an additive manufacturing process. Advantageously, an additive manufacturing process enables the production of material-locking and solid connections, in particular between the shell unit and the receiving unit.

Preferably, the first material, i.e. the material of the shell unit, is not magnetic. In particular, the second material, i.e. the material of the receiving unit, is magnetic. This advantageously enables a magnetic holding force to be realized by the receiving unit, while a viscous fluid can be transported on the shell unit without interaction by magnetic forces between the first metal of the shell unit and the viscous fluid, such as a paint with metal particles. It is also advantageous for a magnetic holding force to be generated by the entire receiving unit. This enables particularly high holding forces. Furthermore, the magnetic holding force can be applied or transmitted homogeneously over the entire length or surface of the receiving unit.

The first material is particularly preferably titanium or aluminum or austenitic and in particular non-magnetic steel, such as stainless steel or another steel alloy. These high-strength materials advantageously have sufficient strength for the high speeds, so that thin material cross-sections can be realized. Inertial forces that occur can advantageously be minimized as a result. Furthermore, these high-strength materials have a low density and high corrosion resistance and chemical stability with respect to the substances in the paint or solvent. The metals are also advantageously non-magnetic. In particular, titanium and austenitic steels can also be processed using additive manufacturing processes. In addition, the first material can also be formed as a different metal. In particular, the second material is formed as ferromagnetic steel with a ferritic or martensitic structure. Preferably, the second material can also be formed as a structural steel, for example. Alternatively, other magnetic materials are also possible as the first and second materials. like a composite material with a metallic matrix or the like.

Preferably, there is at least one transition, and in particular a material transition, between the receiving unit and the shell unit. In particular, the transition between the shell unit and the receiving unit extends over a transition region which extends over partial regions of the shell unit and/or the receiving unit along the axis of rotation. Preferably, an extension of the transition region is small in relation to a height of the bell plate unit. The transition region preferably extends over a region between 0.1% and 5% of the height of the bell plate unit, and preferably over a region between 0.5% and 3.5% of the height of the bell plate unit, and particularly preferably over a region between 1% and 2% of the height of the bell plate unit. In addition, the transition region can also extend over a region which corresponds to up to 10% or up to 20% of the height of the bell plate unit or even an even larger proportion of the height of the bell plate unit.

In particular, in the transition area, particularly locally limited, between the shell unit and the receiving unit, the first material is present exclusively within the shell unit and the second material is present exclusively within the receiving unit. Advantageously, due to this abrupt material transition, there is essentially only one material in the shell unit and the receiving unit. Advantageously, the material properties in the shell unit and the receiving unit are precisely defined. This reduces interaction between the various atoms or molecules, particularly influenced by a structural design, such as a lattice structure or the like, of the materials to a minimum.

In another advantageous development, there is a continuous material transition between the first material and the second material in the transition region, i.e. the second material is partially present in the shell unit and/or the first material is partially present in the receiving unit within the transition region. Preferably, the distribution of the proportions of the two materials follows a predetermined distribution, in particular along a rotation axis. Preferably, the proportion of the first material in the receiving unit and/or the shell unit and/or the proportion of the second material in the receiving unit and/or the shell unit changes at least partially linearly, quadratically, exponentially or logarithmically along the transition region. Furthermore, a distribution of the proportions within the transition region can be made up of different distributions of the proportions in sections. The proportion can be designed as a mass proportion or a volume proportion or even a molecular proportion. Advantageously, a smooth material transition enables the material properties in the transition region to change continuously, in particular according to desired specifications. Alternatively, other distributions are also possible, e.g. B. in the circumferential direction or in the radial direction. In particular, a transition area along the axis of rotation is so small that any influence on the viscous fluid by a second, in particular magnetic material present in the bell unit is small and in particular negligible.

Additionally or alternatively, at least one other material, preferably a transition material, can also be present in the transition area. Several different transition materials can also be present. The transition material can advantageously form a separate transition unit in the transition area or, alternatively, the transition material can also be present as an additional material in a flowing material transition. The transition material can advantageously have a positive influence on a connection between the first and the second material, e.g. as an adhesion promoter or as a damper and between the first and the second material. Other effects and advantages not listed here are possible.

Preferably, at least one tear-off edge unit is included and/or present, which forms a tear-off edge. The tear-off edge unit is expediently firmly and materially connected to the shell unit. Advantageously, the tear-off edge unit provides a defined geometry of an area around the tear-off edge, which particularly advantageously contributes to a defined formation of a spray jet. For this purpose, the tear-off edge unit can preferably comprise knurling along a circumference or the like, which positively influences the formation of spray jets. The geometry of the tear-off edge unit can expediently be precisely defined by machining. In particular, the tear-off edge unit is arranged at a radial end of the shell unit. Alternatively, the tear-off edge unit can also be received on the shell unit in a force-fitting and/or form-fitting manner. In an alternative embodiment, the tear-off edge unit is formed integrally with the shell unit from the first material.

Advantageously, the tear-off edge unit essentially consists of a separate, and in particular other material different from the first material. Preferably, the tear-off edge unit is made at least partially or essentially from ceramic or titanium or steel. Ceramic advantageously has a high level of hardness and strength, making the material particularly suitable for generating the spray jets. Furthermore, it is also advantageous to have a high resistance to wear and tear and in particular abrasion. Other materials, such as metals or metal alloys in particular, are also possible as a separate material. Preferably, here too, analogous to the previously described transition region, there can be a further transition region at a transition between the shell unit and the tear-off edge unit, which is formed abruptly or continuously and/or comprises at least one transition material. All of the above-mentioned embodiments can also be applied to this further transition region.

In particular, the bell plate unit is designed as a single piece. Preferably, the bell plate unit is manufactured as a single piece using a manufacturing process. Advantageously, at least the shell unit and the receiving unit and in particular the tear-off edge unit and/or a transition unit cannot be separated from one another without causing damage, in particular are inseparable, and are preferably connected to one another without visible joints. Advantageously, this means that no structural notch effect occurs during force transmission. Advantageously, this reduces or minimizes the risk of a material connection failing at the sensitive joints. Furthermore, the required structural component cross-sections and thus the weight of the bell plate unit can be minimized, so that a bell plate unit with a significantly lower weight compared to the prior art is available.

Preferably, there is a homogeneous material or microstructure within the bell cup unit, and in particular at least within the shell unit and/or the receiving unit. Advantageously, there are no unwanted and production-related inclusions such as cavities or graphite nests or the like, which locally influence and in particular weaken a material structure. Such a homogeneous microstructure can advantageously be obtained through additive manufacturing processes.

The shell unit preferably comprises at least one distribution disk element. The distribution disk element is advantageously firmly and firmly connected as part of the shell unit and is also made of the first material. Due to the one-piece design, there are no joints, which in particular weaken the structural design. The distribution disk element advantageously promotes a uniform distribution of the viscous fluid and its transport in the radial direction on the paint running surface of the shell unit.

Particularly preferably, the shell unit and/or the receiving unit comprises at least one flushing opening and/or a plurality of flushing openings. Preferably, the flushing openings are designed as flushing lines, which can be formed at least during production using an additive process. Alternatively or additionally, flushing openings or flushing lines can also be formed or reworked using machining. Advantageously, the flushing openings enable cleaning or cleaning of the outer contour of the bell plate unit, and in particular of the shell unit, from the inside of the bell plate.

The receiving unit expediently comprises at least one, in particular approximately, cylindrical or conical or cone-shaped or even prismatic machine holder. In particular, the machine holder has, preferably standardized, dimensions. Advantageously, the conical or cone-shaped machine holder can be introduced into a complementary shaped profile and clamped against the shaped profile in a force-fitting manner, in particular elastically.

In particular, the bell cup unit has at least one and preferably a plurality of internal and closed or sealed cavities. In particular, the shell unit and/or the receiving unit comprises at least one cavity. Such cavities can advantageously lead to a further significant weight saving. Preferably, a lattice or honeycomb structure can be provided in the cavity in order to further optimize strength and/or weight. At the same time, part of the material that can be saved can be used in other places for strength or wear-critical areas. Overall, a lower total weight can be achieved.

Further advantageous developments of the bell cup unit and its properties and advantages arise from the entire application.

The high-speed rotary atomizer unit according to the invention comprises at least one bell plate unit as described above and a drive machine on which the bell plate unit can be or is received, in particular in a force-fitting and/or form-fitting manner. The lower weight of the bell plate unit according to the invention also reduces Load on a drive machine bearing. Further advantages and properties emerge from the entire application.

• - Aufbau, insbesondere schichtweiser Aufbau, eines ersten Körpers durch additive Fertigung, welcher im Wesentlichen durch einen ersten, insbesondere magnetischen oder nicht magnetischen, Werkstoff gebildet wird; und
• - Aufbau, insbesondere schichtweiser Aufbau, eines stoffschlüssig mit dem ersten Körper verbundenen zweiten Körpers durch additive Fertigung, wobei der zweite Körper im Wesentlichen aus einem zweiten, insbesondere magnetischen, Werkstoff gebildet wird.

The method according to the invention for producing a bell cup unit as described above comprises at least the following method steps, in any order:

• - construction, in particular layer-by-layer construction, of a first body by additive manufacturing, which is essentially formed by a first, in particular magnetic or non-magnetic, material; and
• - Construction, in particular layer-by-layer construction, of a second body which is materially connected to the first body by additive manufacturing, wherein the second body is essentially formed from a second, in particular magnetic, material.

The process also has many advantages. By building up the bodies in layers, any proportion of the individual materials and their distribution can be advantageously provided in a transition or transition area between the bodies. Another advantage is that a homogeneous material structure with a high level of strength can be achieved within the bodies. Material-locking connections between two bodies can be produced over the entire cross-section or a maximum diameter with homogeneous and, in particular, high quality.

Another significant advantage of the process is that additive manufacturing processes can produce almost any geometry. Internal and closed cavities can be taken into account directly during production.

Furthermore, a relative change in position of the materially bonded bodies to each other cannot occur.

The method preferably comprises the construction of at least one third body, in particular a tear-off edge unit, which is firmly and cohesively connected to at least the first body and/or the second body, by additive manufacturing. The third body is preferably made essentially of a separate material, in particular a ceramic. Other materials are also possible. Alternatively, the third body, in particular the one present, can preferably be provided as a basis for the construction of the first body. In this case, the third body can also be manufactured by a different manufacturing process. The third body then serves as the basis for the construction of the first body by additive manufacturing.

The additive manufacturing process preferably comprises at least one laser deposition welding process. Preferably, at least the first and/or the second material are in powder form, i.e. as a powder which is heated and in particular melted by a laser, in particular in a locally limited area, so that a material bond is created with an already existing piece of a body and/or an adjacent body. Transition areas, for example between two bodies, can advantageously be manufactured economically and efficiently with continuous changes in the material proportions. Particularly advantageously, a further material, such as a transition material, can also be provided in a transition area without any problems.

In particular, the first body is designed as a shell unit. Preferably, the second body is designed as a receiving unit. Advantageously, the third body is designed as a tear-off edge unit.

Preferably, the bell cup unit is machined and/or a surface coating is applied, in particular to provide a required surface quality for the generation of a spray jet or to enable a required balancing and/or roundness for the particularly high speeds required. Machining and/or cutting production can advantageously be carried out in particular by turning or milling or drilling or the like. Alternatively or additionally, a ceramic coating can additionally increase wear resistance.

Further advantageous developments of the method as well as its properties and advantages arise from the entire application.

• 1 eine schematische Schnittansicht einer erfindungsgemäßen Glockentellereinheit nach einem ersten Ausführungsbeispiel;
• 2 eine schematische perspektivische Ansicht der Glockentellereinheit nach dem ersten Ausführungsbeispiel;
• 3 eine schematische Schnittansicht einer erfindungsgemäßen Glockentellereinheit nach einem zweiten Ausführungsbeispiel;
• 4 eine schematische perspektivische Ansicht der Glockentellereinheit nach dem zweiten Ausführungsbeispiel;
• 5 eine schematische Schnittansicht einer erfindungsgemäßen Glockentellereinheit nach einem dritten Ausführungsbeispiel;
• 6 eine schematische perspektivische Ansicht der Glockentellereinheit nach dem dritten Ausführungsbeispiel; und
• 7 eine Detailansicht zur Visualisierung des erfindungsgemäßen Verfahrens zur Herstellung der Glockentellereinheit.

Further features and advantages of embodiments of the invention are described below with reference to the drawings. The same reference numerals are used for identical or similar parts and for parts with identical or similar functions. They show:

• 1 a schematic sectional view of a bell cup unit according to the invention according to a first embodiment;
• 2 a schematic perspective view of the bell cup unit according to the first embodiment;
• 3 a schematic sectional view of a bell cup unit according to the invention according to a second embodiment;
• 4 a schematic perspective view of the bell cup unit according to the second embodiment;
• 5 a schematic sectional view of a bell cup unit according to the invention according to a third embodiment;
• 6 a schematic perspective view of the bell cup unit according to the third embodiment; and
• 7 a detailed view for visualizing the method according to the invention for producing the bell cup unit.

It is not necessary for a bell plate unit according to the invention to have all of the features described below. It is also possible for a bell plate unit according to the invention to have only individual features of the exemplary embodiment described below.

1 shows a schematic sectional view of a bell plate unit 100 according to the invention according to a first embodiment. The bell plate unit 100 comprises a shell unit 1, which is essentially made of a first material 2, and a receiving unit 3, which is essentially made of a second material 4. The bell plate unit 100 is rotationally symmetrical and extends along a rotation axis 5, about which the bell plate unit 100 can be rotatably received on a drive machine via the machine holder 15 of the receiving unit 3.

The bell cup unit 100 also includes a tear-off edge unit 6. The tear-off edge unit 6 is essentially made of another separate material 7, which is made as ceramic 7. The tear-off edge unit 6 includes a tear-off edge 13. During operation, a viscous fluid, such as a paint, is introduced through a feed opening 17, which is transported along the paint running surface 18 of the rotating shell unit 1 in the radial direction 5a outwards to the tear-off edge 13, at which the viscous fluid detaches from the tear-off edge in the form of droplet or lamellar atomization in the radial direction during operation. This spray is formed by shaping and/or guiding air into a spray jet or several spray jets, which can be used, for example, to paint vehicle body components.

The second material 3 of the receiving unit 4 is designed here as ferromagnetic steel. The ferromagnetic steel applies a holding force for receiving the bell plate unit 100 on a drive machine directly and without additional components such as a magnetic ring. The first material 2 of the shell unit 1 is non-magnetic in order to exclude an interaction and a resulting influence between the viscous fluid, such as a paint loaded with metal particles, and the shell unit 1. The first material 2 is designed here as titanium, which has a high level of strength.

The bell plate unit 100 is advantageously designed as a single piece, i.e. the shell unit 1 and the receiving unit 3 and the tear-off edge unit 6 cannot be separated without causing damage. There are no joints with structural elements such as joint notches that weaken the flow of force. This means that the weight of the bell plate unit 100 can be reduced even further.

The bell cup unit 100 according to the invention is manufactured here by an additive manufacturing process. Firstly, the shell unit 1 is constructed as a first body A by additive manufacturing. Then the receiving unit 3 is connected directly and materially as a second body B and constructed on the shell unit 1.

The tear-off edge unit 6 as a third body C, which is also constructed here by additive manufacturing, is directly and firmly connected to the shell unit 1 as the first body A.

A transition 8a between the shell unit 1, ie body A, and the receiving unit 3, ie body B, is designed here as a transition area 8, see in detail 7 . A further transition 19a is present here between the shell unit 1 and the tear-off edge unit 6.

Furthermore, the bell plate unit 100 here comprises several internal cavities 16, which reduce the weight of the bell plate unit 100 and can be manufactured particularly efficiently using the additive manufacturing process. The cavities 16 are distributed symmetrically around the rotation axis 5 and extend through the receiving unit 3 and the shell unit 1.

2 shows a schematic perspective view of the rotationally symmetrical bell plate unit 100 according to the first embodiment.

3 shows a schematic sectional view of a bell plate unit 100 according to the invention according to a second embodiment. Here, the bell plate unit 100 comprises additional flushing openings 10 designed as flushing lines 10. Advantageously, the flushing openings 10 are also manufactured here by the additive manufacturing process, so that no accessibility for machining is necessary here.

4 shows a perspective sectional view of the bell cup unit 100 according to the second embodiment with the rinsing openings 10. An outer surface of the shell unit 1 can be cleaned through the rinsing openings 10. A rinsing liquid flows out through the rinsing openings 10 and is caught and diverted by the surrounding bead present here, in particular due to the Coanda effect (external cleaning). The bead can be avoided if necessary by skillfully aligning the channel of the rinsing agent holes, which cannot be achieved using machining processes.

5 shows a schematic sectional view of a bell plate unit 100 according to the invention according to a third embodiment. Here, the shell unit 1 of the bell plate unit 100 comprises, in addition to the bell plate unit 100 according to the second embodiment, a distribution disk element 9, by means of which the transport of the viscous fluid to the paint running surface 18 of the shell unit 1 can be controlled.

6 shows a schematic perspective view of the bell cup unit 100 according to the third embodiment.

7 shows a detailed view for visualizing the method according to the invention for producing the bell cup unit 100. Here, a detailed view of the transition 8a between the receiving unit 3 and the shell unit 1 is shown as an example. The transition 8a between the shell unit 1 and the receiving unit 3 is designed here as a transition region 8, which extends over one area of the shell unit 1 and the receiving unit 3. The bodies A, B, C are each built up here by a laser 12 by means of laser deposition welding. The materials are provided as powder 11, i.e. in powder form, and melted by the laser 12 so that they form the bodies A, B, C. The bodies B, C are built up on the already at least partially existing body C and are thus directly and firmly connected to the body A. In the transition region 8, there is a material connection between the shell unit 1 and the receiving unit 3, so that overall a one-piece bell plate unit 100 is present, wherein the shell unit 1 and the receiving unit 3 cannot be separated from one another without causing damage.

The transition region 8 extends here along the rotation axis 5. Various distributions of the materials 2, 4 are possible in the transition region 8. Course a shows a sudden material transition, course b a continuous material transition with a section-wise linear distribution of the mass fractions and a section-wise exponential distribution of the mass fractions of the first and second materials 2, 4, and in course c a transition material 14 is additionally present within the transition region 8. The transition material 14 forms a separate transition unit here.

Analogously, the properties described above apply to the further transition 19a and a transition region 19 formed here between the shell unit 1 and the tear-off edge unit 6.

Advantageously, the bell cup unit 100 is machined after production using the additive manufacturing process and is thereby also balanced, for example. Then, certain areas, such as the painted running surface 18 of the shell unit 1, are coated in order to provide the required wear resistance and surface quality for generating the spray jets.

Reference symbol:

1

shell unit

2

first material, especially non-magnetic

3

recording unit

4

second material, especially magnetic

5

axis of rotation,

5a

radial direction

6

tear-off edge unit

7

separate material of the tear-off edge unit, ceramic

8

transition area

8a

transition

9

distribution disc element

10

flush opening, flush line

11

powder

12

Laser

13

tear-off edge

14

transition material

15

machine recording

16

cavity

17

feed opening

18

paint running surface of the shell unit

19

further transition area

19a

further transition

100

bell plate unit

A

first body

B

second body

C

another, third body

Claims (16)

Bell plate unit (100) for a high-speed rotary atomizer unit for generating spray jets, for example for applying paints to surfaces of components, such as vehicle body components, comprising - a shell unit (1) for generating spray jets, which is essentially made of a first material (2), and - at least one receiving unit (3) for receiving the bell plate unit (100) on at least one drive unit, wherein the receiving unit (3) is essentially made of a second material (4), characterized in that the shell unit (1) and the receiving unit (3) are firmly and materially connected to one another. Bell plate unit (100) after claim 1 , wherein the shell unit (1) and/or the receiving unit (3) are manufactured by an additive manufacturing process. Bell cup unit (100) according to one of the preceding claims, wherein the first material (2) is non-magnetic, and wherein the first material is in particular formed as titanium or as austenitic steel, and wherein the second material (4) is magnetic, and in particular formed as ferromagnetic steel. Bell cup unit (100) according to one of the preceding claims, wherein in a transition region (8) between the shell unit (1) and the receiving unit (3) - the first material (2) is present exclusively within the shell unit (1) and the second material (4) is present exclusively within the receiving unit (3), so that a sudden material transition is present, - or wherein the first material (2) is present partially in the receiving unit (3) and wherein the second material (4) is present partially in the shell unit (1), so that a continuous material transition is present, - and/or wherein at least one transition material (14) is present. Bell cup unit (100) according to one of the preceding claims, comprising at least one tear-off edge unit (6) which is firmly and materially connected to the shell unit (1). Bell cup unit (100) according to the preceding claim, wherein the tear-off edge unit (6) is formed substantially from a separate material (7), and wherein the separate material (7) is formed as a ceramic (7). Bell plate unit (100) according to one of the preceding claims, which is formed in one piece. Bell cup unit (100) according to one of the preceding claims, wherein the shell unit (1) comprises at least one distribution disc element (9) which is firmly and integrally connected. Bell cup unit (100) according to one of the preceding claims, wherein the shell unit (1) comprises at least one flushing opening (10). Bell cup unit (100) according to one of the preceding claims, wherein the receiving unit (3) comprises a conical machine holder (15). Bell cup unit (100) according to one of the preceding claims, comprising internal and closed cavities (16). High-speed rotary atomizer unit comprising at least one bell plate unit (100) according to one of the preceding claims and a drive machine to which the bell plate unit (100) can be received, in particular in a force-fitting manner. Method for producing a bell cup unit (100) according to one of the Claims 1 until 11 comprising at least the following method steps: - construction of a first body (A), in particular a shell unit (1) or a receiving unit (3), by additive manufacturing, which is essentially formed from a first, in particular magnetic or non-magnetic, material (2, 4); and - construction of a second body (B) which is materially connected to the first body (A), in particular a bell cup unit (3) or a receiving unit (3), by additive manufacturing, wherein the second body (B) is essentially formed from a second, in particular magnetic or non-magnetic, material (2, 4). Method according to the preceding claim, comprising the construction of at least one third body (C), in particular a tear-off edge unit (6), which is materially connected at least to the first body (A), by additive manufacturing, wherein the third body (C) is essentially chen is formed from a separate material (7) and in particular from a ceramic (7) or wherein the third body (C) is provided as a basis for the construction of the first body (A). Method according to one of the two preceding claims, wherein the additive manufacturing method comprises at least one laser deposition welding method in conjunction with at least partially powdery (11) materials (2, 4, 7). Method according to one of the three preceding claims, comprising at least one machining step and/or a surface coating step.

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