Arrangement and method for preferably automatically coating objects

Abstract

The invention relates to an arrangement (1) for preferably automatically coating objects with a coating material, in particular with coating powder. The arrangement (1) has at least one spray device (2) with a spray nozzle (3) through which the coating material can be dispensed in the direction of a main spray direction. Furthermore, an extension (4) associated with the at least one spray device (2) is provided, wherein an end region of the extension (4) facing the spray device (2) is preferably detachably connected to an end region of the spray device (2) facing away from the spray nozzle (3). The arrangement (1) also has a guide (5) preferably extending in a horizontal direction, over which the extension (4) with the spray device (2) connected to the extension (4) is longitudinally movable in the direction of extension of the guide (5) relative to the object to be coated.According to the invention, it is particularly provided that the spray device (2) with the spray nozzle (3) is designed such that the main spray direction of the spray nozzle (3) deviates from the extension direction of the guide (5) by a predetermined or definable angle.

Description

[0001] The present invention relates generally to the coating of workpieces with coating material, in particular coating powder.

[0002] In particular, the invention relates to the automatic coating of workpieces, in particular in a coating booth.

[0003] Coating booths for coating workpieces, particularly with coating powder, are generally known from the prior art. Such coating booths typically comprise a coating chamber with a booth floor, two opposing workpiece passages, and a conveyor device for transporting workpieces to be coated through the coating chamber. The conveyor device is typically located below the booth floor and has a workpiece carrier that extends into the coating chamber through a conveyor slot in the booth floor.

[0004] Coating booths with such "floor conveyors" are particularly used for coating high-quality workpieces, as the arrangement of the conveyor below the booth floor allows for high coating quality. This is primarily due to the fact that "traditional" conveyors for suspended transport of workpieces through the coating chamber can encourage dirt particles or powder residues to fall off the conveyor, which can lead to irregularities in the coating.

[0005] The automatic coating of workpieces typically involves the use of a number of spraying devices, which can be moved vertically up and down via a positioning device (usually in the form of a lifting stand) that is usually located outside the coating booth. For this purpose, the spraying devices extend from the positioning device through a vertical wall slot of the booth into the booth, positioned opposite the workpiece to be coated.

[0006] In order to not only coat a workpiece from the side, but also to apply coating material to workpiece surfaces that cannot be reached by the lateral spraying devices, it is known from the prior art to provide additional coating devices above and, if necessary, below the workpiece. In this regard, reference is made, for example, to the system known from the document DE 10 2020 109 819 A1.

[0007] The disadvantage of both vertically and horizontally arranged spray devices is that the entire system has a relatively complex structure.

[0008] The document TR 2020 20493 A2 relates to an arrangement for automatically coating objects with a coating material according to the preamble of independent patent claim 1.

[0009] The invention is based on the object of providing a solution with which a workpiece can be coated preferably automatically from all sides.

[0010] This object is achieved according to the invention by the subject matter of independent patent claim 1, wherein advantageous developments of the invention are specified in the dependent claims.

[0011] Accordingly, the invention relates in particular to an arrangement for the preferably automatic coating of objects with a coating material, in particular with coating powder, wherein the arrangement comprises at least one spray device with a spray nozzle, via which the coating material can be dispensed in a main spray direction. The arrangement according to the invention further comprises an extension associated with the at least one spray device, wherein an end region of the extension facing the spray device is preferably detachably connected to an end region of the spray device associated with the extension facing away from the spray nozzle.

[0012] Furthermore, in the arrangement according to the invention, a guide is provided which preferably extends in a horizontal direction, via which the extension with the spray device connected to the extension can be moved longitudinally in the direction of extension of the guide relative to the object to be coated.

[0013] According to the invention, it is particularly provided that the spray device with the spray nozzle is designed in such a way that the main spray direction of the spray nozzle deviates from the direction of extension of the guide by a predetermined or definable angle.

[0014] In other words, the spraying device of the arrangement according to the invention is designed such that it sprays the coating material not horizontally or vertically, but obliquely from above, below, or vertically onto the object to be coated. This oblique positioning of the main spraying direction allows the spraying device to cover a significantly larger area, particularly angled or corner areas of workpieces.

[0015] Spray devices within the meaning of the present application can be spray heads or guns. The spray nozzle can also be designed as a rotating body. A spray device with a rotating body for atomizing coating powder is known, for example, from US Pat. No. 5,353,995. Furthermore, rotating bodies for atomizing liquid coating material are known from the prior art.

[0016] Spray nozzles with different spray shapes, such as full cone, hollow cone, flat jet, full jet, or cluster nozzles, are particularly suitable. The "main spray direction" of the spray nozzle is defined as the centerline of the spray nozzle. The same applies, in a figurative sense, to spray nozzles with a rotating body for atomizing coating powder or liquid coating material.

[0017] In the arrangement according to the invention, it is provided that the spray device has a main body extending at least substantially in the direction of extension of the guide and having a first and an opposite second end region, wherein a high-voltage cascade circuit is accommodated or can be accommodated in the main body of the spray device, which high-voltage cascade circuit serves for the electrostatic charging of the coating material dispensed or to be dispensed by the spray device.

[0018] Furthermore, it is provided that the first end region of the main body of the spray device is, or can be, connected, in particular detachably, to an opposite end region of the extension associated with the spray device. On the other hand, the second end region of the main body should preferably be detachably connected, in particular over an angular range, to the spray nozzle of the spray device. The angular range between the main body of the spray device and the spray nozzle of the spray device defines the predefined or determinable angle by which the main spray direction of the spray nozzle deviates from the extension direction of the guide.

[0019] In this context, it is particularly preferred that an extension piece is provided between the angled area and the main body of the spray device in order to be able to individually adjust the plane in which the spray nozzle ultimately lies.

[0020] Preferably, the extension associated with the at least one spray device is designed as a hollow body extending in the direction of extension of the guide, in which all supply lines necessary for the operation of the spray device are preferably accommodated or can be accommodated. These are, in particular, supply lines for the coating material, any electrical lines provided for supplying the electrostatic charge, and / or air lines for shaping air.

[0021] By preferably encapsulating all supply lines required for the operation of the spray device in the extension, contamination of the supply lines during operation of the arrangement is effectively prevented, which makes a color change significantly easier, since only a small number of components (here only the outer surface of the extension) need to be cleaned.

[0022] In practical use, it has been found to be particularly preferred that - when the guide extends in a horizontal direction - the main spray direction of the spray nozzles deviates by 15° to 75°, preferably by 25° to 65° and more preferably by about 40° to 50° from the direction of extension of the guide, and preferably deviates in a vertical direction.

[0023] With this angle adjustment of the spray nozzles, an effective coating of a workpiece is possible not only from the side (if the guide extends in the horizontal direction), but also from below or above.

[0024] In preferred embodiments, a drive, in particular a linear drive, is further provided, which is operatively connected to the extension in such a way that the drive can effect a longitudinal movement of the extension with the spray device connected to the extension in the direction of extension of the guide relative to the guide and relative to the object to be coated.

[0025] In other words, according to this development, the at least one spraying device can be moved and / or positioned in the longitudinal direction of the guide relative to the object to be coated.

[0026] According to a further development of the last-mentioned embodiment, it is provided that the drive is assigned a guide carriage which is guided on the guide and is longitudinally movable in the direction of extension of the guide, with which guide carriage the extension is operatively connected in such a way that when the drive causes a longitudinal displacement of the guide carriage relative to the guide, the extension is moved accordingly.

[0027] Of course, other designs for a corresponding motor drive are also possible.

[0028] It has been found to be particularly preferred that the guide should have at least one roller guide connected to the guide, via which the extension with the spray device connected to the extension is guided so as to be longitudinally movable relative to the guide and relative to the object to be coated in the direction of extension of the guide.

[0029] Instead of a roller guide, a sliding guide or similar guide is also conceivable.

[0030] It is particularly preferred that the arrangement further comprises a lifting stand or axis system which is operatively connected to the guide in such a way that the guide can preferably be moved and positioned in the vertical direction.

[0031] According to the invention, it is provided that the arrangement has not just one spray device, but several spray devices. In particular, it is provided according to the invention that the arrangement has a first spray device with a first spray nozzle and at least one further, second spray device with a second spray nozzle, wherein the first extension assigned to the first spray device and the second extension assigned to the second spray device run parallel to one another and preferably vertically spaced from one another. The guide can have at least one first roller guide connected to the guide, via which the first extension with the first spray device connected to the first extension is guided so as to be longitudinally movable relative to the guide and relative to the object to be coated in the direction of extent of the guide.The guide may have at least one second roller guide connected to the guide, via which the second extension with the second spray device connected to the second extension is guided so as to be longitudinally movable relative to the guide and relative to the object to be coated in the direction of extension of the guide.

[0032] According to a further development of this embodiment, it is provided that the first extension and the second extension associated with the at least one further, second spray device are each operatively connected to the guide carriage in such a way that, when the guide carriage is longitudinally displaced relative to the guide by the drive, both the first extension and the second extension are moved accordingly.

[0033] In the invention, in which several spray devices are used, it is provided that the extension piece of the first spray device and the extension piece of the second spray device are designed such that the spray nozzle of the first spray device and the spray nozzle of the second spray device lie in a common, preferably horizontal plane.

[0034] Alternatively or additionally, it is preferred that the angular range of the first spray device and the angular range of the at least one further, second spray device are designed such that the main spray direction of the spray nozzle of the first spray device runs parallel or at least substantially parallel to the main spray direction of the spray nozzle of the at least one further, second spray device.

[0035] Furthermore, an alternative arrangement of the spray devices is conceivable, in which the latter are arranged horizontally next to one another rather than vertically below one another. In particular, a combined tandem arrangement (e.g., 2 x 2) of two spray devices arranged horizontally next to one another and two horizontal spray devices vertically offset below them is also possible.

[0036] Generally speaking, the arrangement according to the invention comprises a first spray device with a first spray nozzle and at least one further, second spray device with a second spray nozzle, wherein the first extension assigned to the first spray device and the second extension assigned to the at least one second spray device run parallel to one another and vertically spaced from one another and / or run parallel to one another and horizontally spaced from one another.

[0037] The invention further relates to a system for the preferably automatic coating of workpieces with coating material, in particular coating powder, wherein the system comprises a spray coating booth, preferably with a conveyor device for, in particular, continuously transporting objects to be coated through the coating booth. The system according to the invention further comprises a lifting stand or axis system, in particular a lifting stand or axis system adjustable in the vertical direction. Furthermore, the system according to the invention comprises an arrangement according to the type according to the invention described above.

[0038] In particular, it is provided that the arrangement and in particular the guide of the arrangement is operatively connected to the lifting stand or axis system in such a way that the guide with the at least one spray device mounted with the guide so as to be longitudinally displaceable in the direction of extension of the guide can be moved and positioned in a direction orthogonal to the direction of extension of the guide.

[0039] According to a further aspect, the invention further relates to a method for the preferably automatic coating of workpieces with coating material, in particular coating powder. Initially, at least one arrangement of the type described above according to the invention is provided. Subsequently, the at least one spray device of the arrangement is moved relative to the workpiece to be coated, preferably with the aid of a lifting stand or axis system.

[0040] The coating method according to the invention is also characterized in particular in that the at least one spray device of the arrangement is moved in a horizontally oscillating movement relative to the workpiece to be coated.

[0041] Alternatively or additionally, the coating process according to the invention is characterized in particular in that the process further comprises the following process steps: With the aid of a conveying device, the workpiece to be coated is conveyed along a transport path through a coating area of a coating station, preferably at a constant conveying speed; and in a monitoring area which is located on the transport path of the workpiece to be coated and - viewed in the conveying direction of the conveying device - upstream of the coating area, a size, geometry and / or contour of at least one area of the workpiece to be coated is / are detected.

[0042] In this context, it is conceivable that with the aid of a positioning device in the coating station, in particular with a time delay and preferably with a time delay dependent on the conveying speed and a distance between the monitoring area and the coating area, the at least one spray device of the arrangement is positioned and / or aligned in the horizontal and / or vertical direction and / or in the conveying direction with respect to the coating area in such a way that when the workpiece to be coated is conveyed through the coating area, the at least one spray device of the arrangement always has a predetermined or definable distance and / or a predetermined or definable alignment to the surface of the workpiece to be coated.

[0043] In this context, it is conceivable that the size, geometry and / or contour of the at least one region of the workpiece to be coated is / is detected by scanning the workpiece at least in part with the aid of at least one first laser beam which runs perpendicular to the conveying direction of the conveying device and with the aid of at least one second laser beam which runs obliquely to the conveying direction of the conveying device.

[0044] The intended use of the arrangement according to the invention can be seen in particular in the following applications: spraying components from top to bottom or from bottom to top, with the spraying devices making a horizontal oscillating movement; and / or positioning the spraying devices in a specific position, with this position being maintained during spraying, with various spraying angles being conceivable for this use, including 0°; and / or positioning the spraying devices in a specific position, with this position being able to be adjusted during spraying according to the component (e.g. long supports which hang at a slight angle on the conveyor), with various spraying angles being conceivable for this use, including 0°; and / or immersing the spraying devices in depressions, hollow spaces or cavities, with various spraying angles being conceivable for this use, including 0°.

[0045] An exemplary embodiment of the arrangement according to the invention is described in more detail below with reference to the accompanying drawings.

[0046] They show: FIG. 1 schematically and in an isometric view an exemplary embodiment of the arrangement according to the invention for automatically coating objects with coating powder; FIG. 2 schematically and in a side view the arrangement according to FIG. 1 ; FIG. 3 schematically and in a plan view from above of the exemplary embodiment of the arrangement according to the invention according to FIG. 1 ; FIG. 4 schematically shows a cross-sectional view along the line AA in FIG. 2 ; and FIG. 5 schematically shows an enlargement of the cross-sectional view according to FIG. 4 .

[0047] For complex components / objects, automatic coating is typically achieved using vertically oscillating axis systems equipped with coating guns, as well as horizontal gun axes or feed axes, which are also equipped with corresponding coating guns. The guns on the feed axes are individually positioned depending on the geometry of the part to be coated, thus ensuring that the parts of the object to be coated that are offset in depth can be sprayed at the correct distance.

[0048] In this context, reference is made, for example, to the annex known from the publication DE 10 2020 134 087 A1.

[0049] In most coating systems, a component suspended from the conveyor serving as a conveying device is coated from the left and right using spray devices / coating guns. The spray devices or coating guns oscillate in a vertical plane next to the workpiece to be coated.

[0050] In many cases this is sufficient, as the coating material also reaches those parts of the component that are not directly in front of the spray device or coating gun.

[0051] However, there is a limitation here, and therefore manual recoating is required, especially for complex workpiece geometries.

[0052] In some cases, horizontally oscillating coating devices or coating guns are also necessary. This means that, orthogonally to the conveying direction of the workpiece to be coated, guns or spray devices oscillate beneath the workpiece and spray upwards. This requires that X-axes, on which the vertical axes are located, are used for this newly oscillating horizontal movement.

[0053] The disadvantages are the large mass that must be moved and the resulting instability. Furthermore, the X-axes of corresponding axis systems are generally not designed for this continuous movement and require a relatively large amount of space.

[0054] With the arrangement according to the invention, as described in more detail below with reference to the accompanying drawings using an exemplary embodiment, these problems can be effectively avoided.

[0055] In detail, the exemplary embodiment of the arrangement 1 according to the invention for automatically coating objects with coating powder shown in the drawings has several (here three) spraying devices 2, each with a spray nozzle 3, via which the coating material can be dispensed in the direction of a main spraying direction.

[0056] In addition, each spray device 2 has a correspondingly assigned extension 4, wherein an end region of the extension 4 facing the spray device 2 is preferably detachably connected to an end region of the spray device 2 assigned to the extension 4 facing away from the spray nozzle 3.

[0057] The arrangement 1 according to the invention is characterized in particular in that it further comprises a guide 5 extending preferably in a horizontal direction, via which the corresponding extensions 4 with the spray devices 2 connected to the extensions 4 are longitudinally movable in the direction of extension of the guide 5 relative to the object to be coated.

[0058] As is particularly evident in the presentation in FIG. 2 can be removed, the solution according to the invention provides in particular that the spray devices 2 with the spray nozzles 3 are designed in such a way that the main spray direction of the spray nozzles 3 deviates from the direction of extension of the guide 5 by a predetermined or definable angle.

[0059] In the embodiment shown in the drawings, the guide 5 extends in a horizontal direction, with the main spray direction of the spray nozzles 3 deviating by approximately 40° to 50° from the direction of extension of the guide 5, specifically in a vertical direction. Of course, other angular ranges are also possible.

[0060] The side view in FIG. 2 In particular, it can be seen that each of the three spray devices 2 has a main body 6 extending at least substantially in the direction of extension of the guide 5 and having a first and an opposite second end region. A high-voltage cascade circuit is accommodated or receivable in the main body 6 of each spray device 2, which serves to electrostatically charge the coating material dispensed or to be dispensed by the corresponding spray device 2.

[0061] The first end region of the main body 6 of each spray device 2 is connected, in particular detachably, to an opposite end region of the extension 4 associated with the spray device 2. On the other hand, the second end region of the main body 6 of each spray device 2 is preferably detachably connected to the spray nozzle 3 of the spray device 2 via a corresponding angle region 7.

[0062] According to the side view FIG. 2 It can also be seen that an extension piece 8 is provided between the angle region 7 and the main body 6 of each spray device 2.

[0063] The sectional view in FIG. 4 and FIG. 5It can be seen that each extension 4 of the corresponding spray device 2 is designed as a hollow body extending in the direction of extension of the guide 5. Preferably, all supply lines necessary for the operation of the corresponding spray device 2 can be accommodated in this hollow body.

[0064] FIG. 1 to FIG. 3 It can be seen in particular that the arrangement 1 according to the invention further comprises a drive 9, in particular an electromotive linear drive, which is operatively connected to the corresponding extensions 4 of the spray devices 2 in such a way that the drive 9 can bring about a longitudinal movement of the extensions 4 with the spray devices 2 connected to the extensions 4 in the direction of extension of the guide 5 relative to the guide 5 and relative to an object to be coated.

[0065] The drive 9 is assigned a guide carriage 10 which is guided on the guide 5 and is longitudinally movable in the direction of extension of the guide 5, with which guide carriage 10 is operatively connected in such a way that when the drive 9 causes the guide carriage 10 to be longitudinally displaced relative to the guide 5, the extensions 4 are moved accordingly.

[0066] Furthermore, in the embodiment of the arrangement 1 according to the invention shown in the drawings, it is provided that the guide 5 has, for each extension 4, a roller guide 11 connected to the guide 5, via which the corresponding extension 4 with the spray device 2 connected to the extension 4 is guided so as to be longitudinally movable relative to the guide 5 and relative to the object to be coated in the direction of extension of the guide 5.

[0067] Although not shown in the drawings, it is conceivable that the arrangement 1 according to the invention is used in conjunction with a lifting stand or axle system which is operatively connected to the guide 5 of the arrangement 1 in such a way that the guide 5 can be moved and positioned preferably in the vertical direction with the aid of the lifting stand or axle system.

[0068] The side view in FIG. 2 It can be seen in particular that the respective extension pieces of the spray devices 2 are selected such that the spray nozzles 3 of the spray devices 2 lie in a common, preferably horizontal plane.

[0069] On the other hand, the angular ranges of the spray devices 2 are selected such that the main spray direction of the individual spray nozzles 3 runs parallel or at least substantially parallel to one another. List of reference symbols

[0070] 1Arrangement 2Spray device 3Spray nozzle 4Extension 5Guide 6Main body of the spray device 7Angle range 8Extension piece 9Drive 10Guide carriage 11Roller guide

Claims

1. An arrangement (1) for coating objects with a coating material, in particular coating powder, wherein the arrangement comprises: - a first spray device (2) having a first spray nozzle (3) via which coating material is dispensable in a main spraying direction and at least one further second spray device (2) having a second spray nozzle (3) via which coating material is dispensable in a main spraying direction; - a first extension (4) associated with the first spray device (2) and a second extension (4) associated with the at least one further second spray device (2), wherein the first extension associated with the first spray device (2) and the second extension (4) associated with the at least one further second spray device (2) run parallel to each other and are vertically spaced from one another and / or run parallel to each other and are horizontally spaced from one another, wherein an end region of the first extension (4) facing the first spray device (2) is preferably detachably connected to an end region of the first spray device (2) associated with the first extension (4) opposite from the first spray nozzle (3), and wherein an end region of the second extension (4) facing the at least one further second spray device (2) is preferably detachably connected to an end region of the at least one further second spray device (2) associated with the second extension (4) opposite from the second spray nozzle (3); and - a guide (5) preferably extending in a horizontal direction via which the corresponding extension (4) with the spray device (2) connected to the extension (4) can be longitudinally moved in a direction of extension of the guide (5) relative to the object to be coated, wherein the spray devices (2) each comprise a main body (6) extending substantially in the direction of extension of the guide (5) and having a first and an oppositely disposed second end region, whereby a high voltage cascade circuit is or can be accommodated in the main body (6) of the spray device (2) which serves in electrostatically charging the coating material dispensed or dispensable by the spray device (2), wherein the first end region of the main body (6) of the spray device (2) is detachably connected or connectable to an oppositely disposed end region of the extension (4) associated with the spray device (2), characterized in that the spray devices (2) with the corresponding spray nozzles (3) are implemented such that the main spraying direction of the spray nozzles (3) deviates from the direction of extension of the guide (5) by a predefined or definable angle, wherein the second end region of the main body (6) is preferably detachably connected to the spray nozzle (3) of the corresponding spray device (2) via an angular region (7), wherein an extension piece (8) is provided between each angular region (7) and the main body (6) of the spray devices (2), wherein the extension piece (8) of the first spray device (2) and the extension piece (8) of the second spray device (2) are implemented such that the spray nozzle (3) of the first spray device (2) and the spray nozzle (3) of the second spray device (2) lie in a common, preferably horizontal plane.

2. The arrangement (1) according to claim 1, wherein the extension (4) is always realized as a hollow body extending in the direction of extension of the guide (5) in which preferably all supply lines necessary for the operation of the spray device (2) are accommodated or accommodatable.

3. The arrangement (1) according to claim 1 or 2, wherein the guide (5) extends in a horizontal direction, and wherein the main spraying direction of the spray nozzles (3) deviates by 15° to 75°, preferably by 25° to 65°, and still more preferably by 40° to 50° from the direction of extension of the guide (5), and preferably in a vertical direction.

4. The arrangement (1) according to anyone of claims 1 to 3, wherein a drive (9), in particular a linear drive, is further provided which is operatively connected to the extensions (4) such that the drive (9) can effect a longitudinal movement of the extensions (4) with the spray devices (2) correspondingly connected to the extensions (4) in the direction of extension of the guide (5) relative to said guide (5) and relative to the object to be coated, wherein the drive (9) is assigned a guide carriage (10), preferably guided at the guide (5) and longitudinally movable in the direction of extension of the guide (5), to which the extensions (4) are operatively connected, such that when the drive (9) effects a longitudinal displacement of the guide carriage (10) relative to the guide (5), the extensions (4) are correspondingly moved with it.

5. The arrangement (1) according to anyone of claims 1 to 4, wherein the guide (5) comprises at least one roller guide (11) connected to the guide (5), via which the extensions (4) with the spray devices (2) correspondingly connected to the extensions (4) are guided in a longitudinally movable manner in the direction of extension of the guide (5) relative to the guide (5) and relative to the object to be coated.

6. The arrangement (1) according to anyone of claims 1 to 5, wherein further a lifting stand or axis system is provided which is operatively connected to the guide (5) such that the guide (5) is preferably movable and positionable vertically.

7. The arrangement (1) according to anyone of claims 1 to 6, wherein the guide (5) further comprises at least one first roller guide (11) connected to the guide (5) via which the first extension (4) with the first spray device (2) connected to said first extension (4) is movably guided longitudinally relative to the guide (5) and relative to the object to be coated in the direction of extension of the guide (5), and wherein the guide (5) further comprises at least one second roller guide (11) connected to the guide (5) via which the second extension (4) with the second spray device (2) connected to said second extension (4) is movably guided longitudinally relative to the guide (5) and relative to the object to be coated in the direction of extension of the guide (5).

8. The arrangement (1) according to claim 4, wherein a first extension (4) associated with the first spray device (2) and a second extension (4) associated with the at least one further second spray device (2) are each operatively connected to the guide carriage (10) in such a way such that, when the guide carriage (10) is moved longitudinally relative to the guide (5) by the drive (9), both the first extension (4) and the second extension (4) are moved accordingly with it.

9. The arrangement (1) according to anyone of claims 1 to 8, wherein the angular region (7) of the first spray device (2) and the angular region (7) of the at least one further second spray device (2) are designed such that the main spraying direction of the spray nozzle (3) of the first spray device (2) is parallel or at least substantially parallel to the main spraying direction of the spray nozzle (3) of the at least one further second spray device (2).

10. A system for preferably automatically coating of workpieces with coating material, in particular coating powder, wherein the system comprises: - a spray coating booth preferably with a conveyor device for continuously transporting objects to be coated through the spray coating booth; - a lifting stand or axis system; and - at least one arrangement (1) according to anyone of claims 1 to 9, wherein the arrangement (1) and in particular the guide (5) of the arrangement (1) are operatively connected to the lifting stand or axis system such that the guide (5) with the spray devices (2) supported so as to be longitudinally displaceable in the direction of extension of the guide (5) is movable and positionable in a direction orthogonal to the direction of extension of the guide (5).

11. A method for preferably automatically coating workpieces with coating material, in particular coating powder, wherein the method comprises the following steps: - providing at least one arrangement (1) according to anyone of claims 1 to 9; and - moving the spray devices (2) of the arrangement (1) relative to the workpiece to be coated, preferably by means of a lifting stand or axis system, characterized in that the spray devices (2) of the arrangement (1) are moved in a horizontally oscillating movement relative to the workpiece to be coated.

12. The method according to claim 11, wherein the method further comprises the following steps: - by means of a conveyor device, the workpiece to be coated is conveyed along a transport path through a coating area of a coating station, preferably at a constant conveyor speed; and - in a monitoring area located on the transport path of the workpiece to be coated and - viewed in the conveying direction of the conveying device - upstream of the coating area, a size, geometry and / or contour of at least one portion of the workpiece to be coated is / are detected; wherein, by means of a positioning device in the coating station, the spray devices (2) of the arrangement (1) are positioned and / or aligned in the horizontal and / or vertical direction and / or in the conveying direction with respect to the coating area, in particular with a time delay and preferably with a time delay dependent on the conveying speed and a distance between the monitoring area and the coating area, such that when the workpiece to be coated is conveyed through the coating area, the spray devices (2) of the arrangement (1) always have a predetermined or determinable distance and / or a predetermined or determinable orientation relative to the surface of the workpiece to be coated.

13. The method according to claim 12, wherein the size, geometry and / or contour of at least one portion of the workpiece to be coated is / are detected by at least partial scanning of the workpiece by means of at least one first laser beam, which runs perpendicular to the conveying direction of the conveying device, and by means of at least one second laser beam, which runs obliquely to the conveying direction of the conveying device.

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