Nozzle device for outputting jet of application material

Abstract

The invention relates to a nozzle device (100) for outputting a jet (S) of an application material, comprising a preferably groove-shaped and / or convexly curved outlet opening (10) for the application material and a nozzle element (1), characterized in that the nozzle device (100) and / or the nozzle element (1) have / has an asymmetric dispensing recess (2) for the application material, according to the invention, the discharge opening (10) is designed to dispense an amount of material, preferably asymmetrically along the discharge opening (10), and / or to output an amount of material that varies, preferably continuously, along the discharge opening (10). The invention also relates to an associated application method.

Description

Technical Field

[0001] The invention relates to a nozzle arrangement for dispensing a (preferably asymmetric or substantially symmetric) spray jet of a (e.g. viscous or highly viscous) application material, wherein the nozzle arrangement has an outlet opening for the application material and at least one nozzle element (e.g. a nozzle plate). The invention also relates to an associated application method. Background Art

[0002] When applying, in particular, highly viscous application materials (e.g. PVC materials) using airless nozzles, advection nozzles, extrusion nozzles, nozzles with 2-plate or 3-plate technology and slot nozzles, a symmetrical spray jet is usually generated. This means that the spray jet always emerges symmetrically from both sides relative to the center point of the outlet opening and thus emerges from the nozzle. This means that the spray jet, starting from the center point of the outlet opening, has exactly the same width on both sides and, in particular, has the same amount of material on both sides.

[0003] DE102006012373B3 discloses a nozzle for applying a high-viscosity material deposited on a substrate in a strip shape, the nozzle body of which is connected to a discharge device, wherein the nozzle has two offset and parallel slot openings of different slot lengths. Here, the substrate is coated symmetrically. However, the substrate is deliberately coated with two different layer thicknesses. The nozzle produces two symmetrical jets with different jet widths. The two slot openings are arranged one after the other. During the application process, the longer opening precedes the shorter opening (appropriately a few millimeters). This results in the application having two different layer thicknesses, namely a larger layer thickness in the middle and a smaller layer thickness on the outside. One disadvantage of this nozzle is that, for example, since the substrate is coated with two jets, a very large amount of material is applied. This in turn means a very high application speed. Coatings less than 600 μm are not achievable or difficult. In addition, the nozzle can only be used for application in one direction within the visible range, because the longer opening is always before the shorter opening. In addition, the nozzle does not allow the layer thickness on the substrate to change continuously in the cross section. Instead, a "step" is formed at the transition from a greater layer thickness to a smaller layer thickness.

[0004] Furthermore, it can be disadvantageous to produce a uniform layer thickness of the spray jet on the substrate, especially on curved substrates, such as the door sills of motor vehicles, e.g. Figures 10A to 10B as shown in the example.

[0005] like Fig. 10A As shown, it is usually desirable that the lower region of the door sill has a greater layer thickness S2 and the upper region has a smaller layer thickness S1, and in particular the layer thickness preferably decreases continuously from bottom to top.

[0006] If the sill is coated with a spray jet, a uniform, symmetrical layer thickness is produced, for example using a high-viscosity application material and using an applicator (e.g. an atomizer) with Fig. 10B The setting angle shown (eg 90° to the door sill surface) results in an almost uniform layer thickness over the surface.

[0007] In order to create a greater layer thickness in the lower area and to produce a layer thickness that is flattened at the top using this spray jet, the setting angle is usually changed, e.g. Fig. 10C However, this would cause the upper edge of the application (see Fig. 10C The customer does not accept the application.

[0008] On the other hand, if a sharp edge is required, usually Fig. 10D The applicator is set as shown. With this setting angle of the applicator, a sharp upper edge can be achieved, but here, a very large layer thickness is achieved in the upper visible area, while a smaller layer thickness is achieved in the lower visible area. Therefore, the customer's requirements are also not met. Summary of the invention

[0009] The object of the present invention is to provide an alternative and / or improved nozzle device, preferably a nozzle device with which an application having a varying layer thickness, for example a continuously varying layer thickness, for example an increasing layer thickness, can be produced.

[0010] This object is solved by the features of the independent claims. Advantageous developments of the invention are disclosed in the dependent claims or can be taken from the following description of preferred embodiments of the invention.

[0011] The invention relates to a nozzle arrangement for distributing, for example, an asymmetrical or approximately symmetrical spray jet of a coating material, preferably for producing a coating on a motor vehicle component, for example a body and / or accessories therefor, such as a door sill.

[0012] The nozzle arrangement comprises a (preferably frontal and / or groove-shaped, in particular strip-shaped) outlet for the application material and at least one nozzle element.

[0013] For example, the discharge opening may be straight or convexly curved.

[0014] The nozzle element and / or the nozzle arrangement has an asymmetric distribution recess (e.g., an asymmetric outlet profile) for applying material, for example, in order to asymmetrically distribute the amount of material along the discharge outlet and / or output an amount of material that varies (preferably continuously varies) along the discharge outlet, preferably so that the amount of material varies continuously, for example increases continuously, at least partially along the discharge outlet or along substantially the entire discharge outlet.

[0015] This makes it possible to produce an injection jet whose amount of material varies (eg continuously) with the jet width of the injection jet.

[0016] This makes it possible to produce applications with a continuously varying layer thickness, for example on motor vehicle parts, for example with a continuously varying, for example continuously increasing, layer thickness.

[0017] For example, the dispensing recess can have a recess for the application material, for example for accumulating the application material.

[0018] The recess is preferably a concave recess, in particular a recess which is suitably concavely curved.

[0019] However, the recesses may have other suitable geometries, such as polyhedral and / or straight recesses.

[0020] The dispensing recess, in particular the recess, can have a dispensing edge for the application material, which is preferably curved and / or inclined toward the discharge opening. The application material can preferably be supplied to the discharge opening via the dispensing edge.

[0021] The nozzle arrangement, the dispensing recess, the dispensing edge, the dispensing groove mentioned below and / or the recess can generate in particular different gap resistances, path resistances and / or flow resistances for the application material, depending on which the application material can be advantageously distributed along the discharge opening.

[0022] The gap resistance, the path resistance and / or the flow resistance may increase, preferably continuously, for example, along the dispensing recess and / or the dispensing groove mentioned below.

[0023] The recess and / or the dispensing edge may at least partially be suitably shaped, for example, as a straight line (eg a polygon), may at least partially comprise an arcuate shape with a substantially constant curvature and / or may at least partially comprise an arcuate shape with a preferably continuously varying curvature.

[0024] For example, the arc shape may substantially correspond to a circular arc shape, or may deviate appropriately from a circular arc shape.

[0025] For example, the nozzle element can have a supply channel, which is used to supply the application material. The supply channel can be appropriately opened into the distribution recess so that the application material can be appropriately supplied to the distribution recess.

[0026] The nozzle element can have a suitable front face, in particular a straight or convexly curved spray edge, for applying the material.

[0027] The recess and the ejection edge may produce an asymmetrical nozzle element profile.

[0028] Preferably, the concave recess and the convexly curved spray edge can produce an asymmetrical concave-convex nozzle element profile and / or an asymmetrical nozzle element profile.

[0029] A distance (e.g., a channel gap) is defined between the dispensing edge and the ejection edge, and the distance increases by at least 1.2 times; 1.5 times; 2.0 times; 2.5 times; or 3.0 times along the dispensing edge. Alternatively, the amount of material may increase along the discharge opening, for example, by at least 1.2 times; 1.5 times; 2.0 times; 2.5 times; or 3.0 times.

[0030] For example, the distance on one side of the central plane (see below) may be at least 1.2 times; 1.5 times; 2.0 times; 2.5 times; or 3.0 times greater than the distance on the other side of the central plane.

[0031] The dispensing recess, depression and / or supply channel can preferably penetrate completely through the nozzle element.

[0032] The nozzle arrangement may have a (eg strip-shaped, asymmetrical and / or sickle-shaped) distribution groove for applying the material.

[0033] The dispensing groove may suitably form at least a portion of a dispensing recess, extend in an arcuate manner and / or narrow (eg continuously) along its longitudinal extent (in particular starting from its inlet).

[0034] The distributing groove can be delimited by at least one convex, preferably arcuate, edge segment and / or a concave, preferably arcuate, edge segment.

[0035] The concave edge section preferably extends opposite the convex edge section, so as to appropriately form a dispensing groove therebetween.

[0036] For example, the convex edge segment may have a longitudinal extension and the concave edge segment may have a longitudinal extension, wherein the longitudinal extension of the convex edge segment may appropriately be smaller than the longitudinal extension of the concave edge segment.

[0037] Alternatively or additionally, the convex edge section and the concave edge section can have, for example, different radii of curvature, preferably in order to narrow (in particular continuously) the dispensing recess and / or dispensing groove along its longitudinal extension.

[0038] The dispensing recess, dispensing groove, depression, dispensing edge, concave edge section and / or convex edge section can be curved towards the outlet opening.

[0039] For example, the nozzle arrangement can have further nozzle elements and / or additional nozzle elements.

[0040] For example, the further nozzle element may have a (preferably substantially symmetrical or asymmetrical) distribution recess for applying the material.

[0041] For example, the further nozzle element may have a straight or convexly curved spray edge.

[0042] The nozzle element and / or the further nozzle element can have a supply channel for supplying application material, wherein the supply channel can preferably open centrally or eccentrically into the distributor recess of the nozzle element and / or the distributor recess of the further nozzle element.

[0043] For example, the supply channel of the nozzle element and / or the further nozzle element can have an inlet opening for the application material on the front side of the nozzle element and / or the further nozzle element.The inlet opening and the outlet opening are preferably aligned in opposite directions.

[0044] The supply channel of the nozzle element and / or of the further nozzle element can appropriately narrow, widen and / or have a substantially constant channel cross section towards the dispensing recess of the nozzle element and / or of the further nozzle element.

[0045] In particular, a distribution recess and / or a distribution groove of the nozzle element and / or a further nozzle element can appropriately have a longitudinal side and a front side, wherein the application material can be introduced, for example, in particular through the longitudinal side and / or the front side of the nozzle element and / or the further nozzle element into the distribution recess and / or the distribution groove.

[0046] At the same time, the longitudinal sides of the distribution groove and / or the longitudinal sides of the distribution recess can be open to the application material so that the application material can be introduced through the longitudinal sides, or closed so that the application material can preferably not be introduced through the longitudinal sides.

[0047] The application material can flow through the distribution recess and / or distribution groove of the nozzle element and / or another nozzle element in the longitudinal direction and leave the distribution recess and / or distribution groove transversely to the longitudinal direction, wherein the distribution recess and / or distribution groove in particular produces different path resistances for the application material.

[0048] The application material can also flow into the distribution recess and / or distribution groove of the nozzle element and / or another nozzle element transversely to the longitudinal direction of the distribution recess and / or distribution groove, and (in particular after changing direction) leave the distribution recess and / or distribution groove transversely to the longitudinal direction, wherein the distribution recess and / or distribution groove in particular produces different gap resistances for the application material.

[0049] The dispensing recess of the nozzle element and the dispensing recess of the further nozzle element can suitably partially overlap one another and / or form a common dispensing chamber for the application material.

[0050] The concave edge segment and the convex edge segment may suitably be part of the nozzle unit.

[0051] Alternatively or additionally, the further nozzle element may have a further convex, preferably arc-shaped edge segment. The further convex edge segment preferably extends opposite the concave edge segment, so as to appropriately form a distribution groove between the two.

[0052] The convex edge section of the further nozzle element can also delimit the distributor groove in a suitable manner and / or extend along its longitudinal extent approximately parallel to and / or approximately flush with the convex edge section of the nozzle element.

[0053] For example, the convex edge section may be part of the nozzle unit.

[0054] For example, the concave edge section can be part of a further nozzle element.

[0055] The concave edge section can be formed by a dispensing edge of the nozzle element and / or by a (preferably curved) dispensing edge of a further nozzle element.

[0056] The nozzle element and / or the further nozzle element, in particular the distribution recess of the further nozzle element and / or the distribution recess of the nozzle element can have, for example, at least one of the following items: a central recess, a protrusion protruding on the outside on both sides, and / or a (preferably substantially straight) edge area (for example, a first edge area and a second edge area) located between the protrusion and the central recess on both sides, for example, the edge area can extend orthogonally to the center plane.

[0057] The supply channel of the nozzle element is preferably arranged approximately centrally relative to the outlet opening and / or relative to the central recess of the further nozzle element.

[0058] For example, the central recess can have a central (especially bottom) arcuate segment and two outer (especially lateral) side segments (such as arcuate segments or linear segments) adjacent to the central arcuate segment, such as a first outer segment (such as an arcuate segment or a linear segment) and a second outer segment (such as an arcuate segment or a linear segment).

[0059] The distribution edge (particularly on the injection side) can be connected with a first end to the transition area between the first outer segment (e.g., arcuate segment or linear segment) and the first edge area, for example to the first outer segment (e.g., arcuate segment or linear segment) or the first edge area, or substantially directly connected between the two. Alternatively or additionally, the distribution edge (particularly on the supply side) can be connected with a second end, for example to the transition area between the central arcuate segment and the second outer segment (e.g., arcuate segment or linear segment), for example to the central arcuate segment or the second outer segment (e.g., arcuate segment or linear segment) or substantially directly connected between the two.

[0060] The distributor recess of the nozzle element, in particular its inlet side, can be connected substantially flush with the central arc segment, in particular the outlet side of the central arc segment.

[0061] The distribution recess and / or the distribution groove of the nozzle element can be open or closed, for example, on the spray side.

[0062] For example, the dispensing recess of the further nozzle element can be open or closed.

[0063] The supply channel, in particular the distribution recess and / or the distribution groove of the nozzle element, can preferably penetrate the nozzle element completely orthogonally, thus in particular completely penetrate the nozzle element, preferably orthogonally to its element plane.

[0064] The supply channel, the distributing groove and / or the distributing recess of the further nozzle element can preferably penetrate the further nozzle element completely orthogonally, thus in particular completely through the further nozzle element, for example perpendicularly to its element plane.

[0065] For example, the dispensing recess of the nozzle element may open into the dispensing recess of the further nozzle element approximately orthogonally to the nozzle element, preferably at least partially within and / or at least partially outside the central recess of the further nozzle element.

[0066] The dispensing edge, the concave edge segment and / or the convex edge segment of the nozzle element and / or the further nozzle element can be suitably arranged, for example, between two protrusions and / or between two edge regions of the appropriate nozzle element. Here, the concave edge segment can, for example, suitably connect two edge regions to one another, wherein, alternatively or additionally, the convex edge segment can preferably remain spaced apart from the first edge region, for example, to create a passage for the application material. Preferably, the convex edge segment can suitably be connected, for example, to the second edge region, for example, without creating a passage for the application material.

[0067] The (e.g. symmetrical) distribution recess of the further nozzle element can be delimited, for example, by two side edges which widen toward the concave edge section of the further nozzle element and are connected to the concave edge section of the further nozzle element on both sides. Here, for example, the concave edge section of the further nozzle element can delimit the distribution recess of the further nozzle element on the injection side.

[0068] Here, the concave edge section of the further nozzle element can correspond, for example, to a dispensing edge for application material, wherein the application material can preferably be supplied to the discharge opening via the dispensing edge.

[0069] For example, the nozzle arrangement may comprise an additional nozzle element which may, for example, comprise a frontal (in particular straight or convexly curved) spray edge.

[0070] In the context of the present invention, the additional nozzle element is preferably designed structurally essentially identically to the nozzle element and / or to the further nozzle element, and what is disclosed for the nozzle element and / or for the further nozzle element also applies to the additional nozzle element.

[0071] Thus, the additional nozzle element may preferably have features of the nozzle element as disclosed herein and / or features of further nozzle elements.

[0072] Thus, the additional nozzle element can have a distributing recess, a depression, a distributing edge, a supply channel, a distributing groove, a concave edge section, a convex edge section and / or a spray edge, in particular features disclosed for the nozzle element and the further nozzle element.

[0073] Thus, the nozzle arrangement may comprise a nozzle element, a further nozzle element and / or an additional nozzle element.

[0074] The further nozzle element is preferably arranged between the nozzle element and the additional nozzle element, for example directly therebetween.

[0075] For example, the nozzle element may be arranged between the other nozzle element and the additional nozzle element, such as directly therebetween.

[0076] The distribution recess, recess, distribution edge, distribution groove, concave edge segment, convex edge segment, supply channel and / or injection edge of the nozzle element and the distribution recess, recess, distribution edge, distribution groove, concave edge segment, convex edge segment, supply channel and / or injection edge of another nozzle element and / or additional nozzle element are aligned approximately flush with each other (in particular, arranged basically in the same manner) and / or extend approximately parallel to each other.

[0077] The distribution recess, recess, distribution edge, distribution groove, concave edge segment, convex edge segment, supply channel and / or injection edge of the nozzle element and the distribution recess, recess, distribution edge, distribution groove, concave edge segment, convex edge segment of another nozzle element and / or additional nozzle element can preferably be structurally formed to be basically identical.

[0078] The outlet opening can extend, for example, along between a spray edge of a nozzle element and a spray edge of a further nozzle element and / or an additional nozzle element.

[0079] The outlet opening may extend, for example, along between the ejection edge of the further nozzle element and the ejection edge of the additional nozzle element.

[0080] The nozzle arrangement can have, for example, a centre plane, wherein the centre plane can be defined by a centre axis of the outlet opening and can be aligned, for example, substantially orthogonal to the (suitably strip-shaped and / or slot-shaped) outlet opening, in particular, for example substantially orthogonal to an element plane (preferably a plate plane) of the nozzle element, of a further nozzle element and / or an additional nozzle element.

[0081] For example, the centre plane can divide the length of the discharge opening and / or the length of the ejection edge of the nozzle element and / or of the additional nozzle element into two halves of substantially equal length.

[0082] The dispensing recess, dispensing groove, supply channel, in particular the inlet opening, recess, convex edge section and / or dispensing edge of the nozzle element can be designed, in particular, asymmetrically or approximately symmetrically with respect to the center plane.

[0083] Alternatively or additionally, the distributor recess, the supply channel, in particular its inlet opening, the convex edge section and / or the concave edge section of the further nozzle element can be formed, in particular, asymmetrically or approximately symmetrically with respect to the centre plane.

[0084] For example, the concave edge section of the nozzle element and / or of the further nozzle element may be formed substantially symmetrically with respect to the centre plane.

[0085] For example, the distribution recesses, distribution grooves and / or recesses of the nozzle element can be arranged eccentrically relative to the center plane, for example more than 50%, 60%, 70% or 80%, and therefore, in particular the distribution recesses, distribution grooves and / or recesses can preferably be arranged appropriately on one side of the center plane more than 50%, 60%, 70% or 80%, and the rest can be arranged appropriately on the other side of the center plane.

[0086] The projection can be arranged essentially flush with the spray edge of the nozzle element, with the spray edge of the further nozzle element and / or with the spray edge of the additional nozzle element, in particular so that the projection delimits the discharge opening on both sides outside and / or there is no passage gap for the application material on both sides between the projection and the spray edge of the nozzle element, with the spray edge of the further nozzle element and / or with the spray edge of the additional nozzle element.

[0087] Alternatively, the projection can be offset (appropriately set back) relative to the spray edge of the nozzle element, the spray edge of the further nozzle element and / or the spray edge of the additional nozzle element, so as to create a (suitable one-sided or two-sided) passage gap (e.g., preferably with a height of between 0.1 mm and 2.0 mm) for the application material. This can advantageously reduce the edge buildup in the application created on the motor vehicle part.

[0088] At least one of the following items can be formed essentially centrally aligned and / or symmetrically (in particular relative to the center plane): the discharge opening; the supply channel of the nozzle element and / or a further nozzle element, in particular its inlet opening; the injection edge of the nozzle element and / or a further nozzle element; the concave edge section of the nozzle element and / or a further nozzle element; the distribution recess of the further nozzle element and / or the injection edge of the additional nozzle element.

[0089] Alternatively or additionally, for example, two edge regions and / or two projections of the nozzle element and / or of the further nozzle element may be substantially centrally aligned (in particular with respect to a centre plane) and / or may be formed substantially symmetrically.

[0090] A recess, a dispensing edge, a dispensing recess, a concave edge segment and / or a convex edge segment of the nozzle element and / or of a further nozzle element can have, for example, a chord, wherein the chord can have a chord angle relative to the center plane that is preferably less than 90°, 85° or 80° and / or greater than 55°, 60° or 65°.

[0091] The concave edge section of the nozzle element and / or of the further nozzle element can have, for example, a chord which can have a chord angle of, for example, substantially 90° relative to the central plane.

[0092] The nozzle element may be a nozzle plate, the further nozzle element may be a nozzle plate and / or the additional nozzle element is a nozzle plate.

[0093] The asymmetry (e.g., of the dispensing recess, pocket and / or dispensing edge of the nozzle element, but preferably also of other asymmetric parts disclosed herein) may be linear or non-linear (e.g., from left to right). The asymmetry may be varied as appropriate.

[0094] The asymmetry can also be formed asymmetrically from the center plane to only one side, wherein in particular the ratio between the center plane and the outer area of ​​the distribution recess can be, for example, at least 1.5; 2.0; or 2.5.

[0095] At the discharge opening, the amount of material may preferably increase substantially continuously from one side (eg the left side) of the discharge opening to the other side (eg the right side) of the discharge opening.

[0096] It should be mentioned that the nozzle element and the further nozzle element and optionally the additional nozzle element can preferably shape the spray jet, in particular with regard to the material quantity distribution along the discharge opening.

[0097] The nozzle element and / or the additional nozzle element preferably serves to laterally delimit the outlet opening and / or the distributor recess of the further nozzle element.

[0098] Further nozzle elements and / or additional nozzle elements can also preferably be used to laterally delimit the outlet opening and / or the distributor recess of the nozzle element.

[0099] The nozzle arrangement is preferably adapted to produce a spray jet which is substantially free of overspray.

[0100] For example, the application material may be a viscous or highly viscous application material.

[0101] For example, the application material may be a plastisol, in particular a PVC plastisol (PVC: polyvinyl alcohol).

[0102] For example, the application material may be paint.

[0103] The outlet opening is preferably slot-shaped, in particular with a suitable longitudinal extension.

[0104] The nozzle element, the further nozzle element and / or the additional nozzle element may be an outer plate.

[0105] For example, the nozzle element and / or the further nozzle element may be an inner plate.

[0106] It should be mentioned that the nozzle element and / or the further nozzle element, in particular the distributing recess of the further nozzle element and / or the distributing recess of the nozzle element can have, for example, a central recess, projections protruding on both sides and / or two edge regions.

[0107] In the context of the present invention, it can be implemented in such a way that the nozzle element and / or the further nozzle element can have a particularly asymmetrical distribution recess for applying the material, preferably in order to asymmetrically distribute the material quantity along the discharge opening and / or output a material quantity that varies, preferably continuously, along the discharge opening.

[0108] The invention also comprises a painting robot having a nozzle arrangement as disclosed herein.The painting robot is suitably used for guiding the nozzle arrangement along a motor vehicle component, in particular a curved motor vehicle component.

[0109] For example, the motor vehicle component may be a vehicle body and / or its accessories.

[0110] For example, the motor vehicle part may be a door sill.

[0111] For example, a painting robot may have multiple robot arms, in particular a multi-axis robot.

[0112] The invention also relates to a coating method for distributing a (for example asymmetrical or substantially symmetrical) spray jet of coating material onto a (preferably curved) motor vehicle part using a nozzle arrangement.

[0113] The nozzle device comprises a (preferably frontal, groove-shaped and / or convexly curved) discharge opening for applying material and a nozzle element, wherein the nozzle device and / or the nozzle element have an asymmetric distribution recess for applying material so that the amount of material is asymmetrically distributed along the discharge opening and / or an amount of material that varies (e.g., substantially continuously) along the discharge opening is output.

[0114] As disclosed herein, the application method may be performed using, among other things, a nozzle arrangement and / or an application robot.

[0115] Therefore, disclosures concerning the nozzle stop and / or the application robot apply correspondingly to the application method and vice versa.

[0116] On the motor vehicle component, an application path can be created, the layer thickness of which the applied material varies substantially continuously (preferably increases), preferably the layer thickness of the applied material increases or decreases continuously from top to bottom.

[0117] For example, in cross section, the application path may be asymmetrical and / or curved. Alternatively or additionally, the application path may advantageously end in a particularly sharp application edge. In the context of the present invention, a sharp application edge is preferably understood to be an approximately straight edge, in particular an edge without discernible waves when viewed with the human eye and / or whose layer thickness distribution is so uniform that the human eye can discern a smooth surface condition. Preferably, the protruding dimension of the waves is, for example, less than 2.0 mm; 1.5 mm; 1 mm; 0.5 mm; 0.2 mm or 0.1 mm.

[0118] On motor vehicle components, for example, a plurality of application paths (preferably extending substantially parallel) can be produced by varying layer thicknesses of the applied material, wherein adjacent application paths can overlap one another, preferably resulting in an approximately uniform applied layer thickness.

[0119] The spray jet can be formed, for example, asymmetrically or approximately symmetrically, for example, depending on the volume flow of the application material.

[0120] Depending on the (eg only temporarily varying) volume flow of application material, the spray jet and / or the jet width of the spray jet can vary asymmetrically, for example relative to a central axis of the outlet opening, in particular relative to a central plane.

[0121] Thus, for example, the jet width may increase or decrease more on one side of the central axis of the discharge opening than on the other side of the central axis, so that, for example, a spray jet may be generated whose jet width is greater on one side relative to the central axis of the discharge opening than on the other side. Thus, for example, the jet width may be greater on one side of the central axis of the discharge opening than on the other side of the central axis of the discharge opening.

[0122] The centre axis of the injection jet is preferably offset from the centre axis of the discharge opening.

[0123] An asymmetric spray jet can be used, for example, in an advantageous manner, by the spray jet deliberately bypassing parts on a motor vehicle component (e.g. holes or bolts), optionally also in combination with an evasive movement of the nozzle device (suitably generated by the painting robot) (e.g. only about 2 mm to 4 mm).

[0124] By changing the volume flow of the coating material, the jet width of the spray jet can also be changed. However, this does not happen symmetrically in particular. Instead, the spray jet can be appropriately offset relative to the central axis of the outlet. The more coating material flows, the more the spray jet emerges from the outlet.

[0125] In the context of the invention, it is thus possible, for example, that the jet width can vary asymmetrically, in particular relative to the center axis of the outlet opening, in particular relative to the center plane. In contrast, when the volume flow of the application material of a conventional symmetrical nozzle configuration is varied, the jet width does not vary asymmetrically, but rather equally on both sides.

[0126] During dispensing of the coating material, the discharge opening and its center axis may be set at an angle between 85° and 95° (in particular approximately 90°) relative to the coating surface of the motor vehicle component.

[0127] The motor vehicle component is preferably a curve and / or a door sill.

[0128] The spray jet may be applied to convexly curved surfaces of automotive parts and the like.

[0129] The coating produced on the motor vehicle component can have a greater or lesser layer thickness in the lower region of the motor vehicle component than in the upper region of the motor vehicle component. Alternatively or additionally, the layer thickness of the coating produced on the motor vehicle component can decrease or increase, in particular continuously, from the lower region of the motor vehicle component to the upper region of the motor vehicle component.

[0130] The application site is preferably a coating, for example a coating produced in particular from the application material on the motor vehicle component.

[0131] For example, the application may be a visible application, in particular an application to an externally visible area of ​​a motor vehicle part, which is why it is usually produced to a high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0132] The preferred embodiments and features of the invention described above can be combined with each other. Advantageous developments of the invention are disclosed in the appended claims or can be derived from the following description of preferred embodiments of the invention in conjunction with the accompanying drawings. In the drawings:

[0133] Figure 1 A perspective view showing a nozzle arrangement according to an embodiment of the present invention;

[0134] Figure 2 shows a nozzle element according to an embodiment of the present invention;

[0135] Figure 3 shows a further nozzle element according to an embodiment of the present invention;

[0136] Figure 4 showing additional nozzle elements according to an embodiment of the present invention;

[0137] Figure 5 The nozzle element and the further nozzle element are shown in an operating position, in particular with a schematic representation of an amount of material which, according to an embodiment of the invention, is asymmetrically distributed along the discharge opening and / or varies along the discharge opening;

[0138] Figure 6 A schematic front view showing three nozzle elements according to an embodiment of the present invention;

[0139] Figure 7 shows a nozzle element and a further nozzle element according to another embodiment of the invention;

[0140] Fig. 8A and 8B Schematically shows an asymmetric spray jet according to an embodiment of the present invention, in particular, an asymmetric change in the jet width;

[0141] Fig. 9 A schematic plan view showing an application scheme, in particular an application object (eg, an application path) according to an embodiment of the present invention;

[0142] Figures 10A to 10D An application arrangement for coating a curved motor vehicle component is shown;

[0143] Fig.11 A schematic diagram of the prior art is shown, in which the amount of material is distributed symmetrically along the discharge opening and / or a constant amount of material is output along the discharge opening;

[0144] Figures 12 to 14 A nozzle arrangement, in particular a nozzle element and a further nozzle element according to an embodiment of the present invention are shown;

[0145] Fig.15 Show according to Figures 12 to 14 Schematic diagram of working mode of an embodiment of the present invention, in particular according to the principle of "path resistance";

[0146] Figures 16 to 18A nozzle arrangement, in particular a nozzle element and a further nozzle element according to another embodiment of the invention are shown; and

[0147] Fig.19 Show according to Figures 16 to 18 Schematic diagram of the working mode of an embodiment of the present invention, in particular according to the "gap resistance" principle.

[0148] The preferred embodiments of the present invention described with reference to the accompanying drawings correspond in part, wherein similar or identical components have the same reference numerals, and, in order to avoid repetition, may also be explained with reference to the description of other embodiments. For ease of explanation, not all components are provided with reference numerals in all drawings. DETAILED DESCRIPTION

[0149] In the following, reference is made to Figures 1 to 6 A nozzle device 100 according to an embodiment of the present invention will be described.

[0150] Here, Figure 1 A perspective view of a nozzle arrangement 100 is shown, which has a frontal, slot-shaped, convexly curved outlet opening 10 for outputting a preferably asymmetrical or approximately symmetrical spray jet S of application material. Alternatively, the outlet opening 10 can also be designed, for example, to be straight.

[0151] The spray jet S can be applied, for example, to a suitably curved motor vehicle component 200, in particular Figures 10A to 10D Threshold shown.

[0152] The nozzle arrangement 100 preferably comprises a plurality of nozzle elements, namely the nozzle element 1, the further nozzle element 20 and the additional nozzle element 30, which can suitably delimit the discharge opening 10 and can in particular be formed as a nozzle plate. The further nozzle element 20 is preferably arranged between the nozzle element 1 and the additional nozzle element 30. The nozzle element 1, the further nozzle element 20 and the additional nozzle element 30 can preferably be clamped between two clamping parts.

[0153] The nozzle element 1 and / or the nozzle arrangement 100 comprises an asymmetrical distribution recess 2 for applying material. The asymmetrical distribution recess 2 makes it possible in particular to distribute the material amount asymmetrically along the discharge opening 10 and / or to output a material amount that varies along the discharge opening 10, wherein the material amount can preferably increase continuously, in particular continuously along the discharge opening 10. Thus, a spray jet S can advantageously be generated, the material amount of which also varies asymmetrically over the jet width sb of the spray jet S.

[0154] In contrast, Fig.11 The prior art is schematically shown, in which the amount of material is distributed symmetrically along the discharge opening and / or a constant amount of material is delivered along the discharge opening.

[0155] like Figure 5 As shown in the schematic diagram in FIG. 1 , for example, the amount of material may increase substantially continuously along the discharge opening 10 (eg, from right to left).

[0156] The dispensing recess 2 comprises a concavely curved recess 3.1 for applying material and a front, curved dispensing edge 3.2, wherein the recess 3.1 and / or the dispensing edge 3.2 can also be at least partially straight and / or polygonal.

[0157] The recess 3 . 1 preferably serves to accumulate the application material, wherein the application material can be appropriately supplied to the discharge opening 10 via the dispensing edge 3 . 2 .

[0158] The recess 3.1 and / or the dispensing edge 3.2 may be at least partially straight (e.g. polygonal), may at least partially comprise an arcuate shape having a constant curvature (e.g. a constant radius of curvature r3) and / or may at least partially comprise an arcuate shape having a preferably continuously varying curvature (e.g. a varying radius of curvature r3).

[0159] For example, the arc may substantially correspond to a circular arc, although other (eg curved and / or at least partially straight) shapes may also be suitable.

[0160] The nozzle element 1 furthermore has a supply channel 4 for supplying application material, wherein the supply channel 4 opens into the distribution recess 2 .

[0161] The nozzle element 1 further comprises a frontal, in particular convexly curved, spray edge 10.1. Alternatively, the nozzle element 1 can also have a straight spray edge 10.1.

[0162] Thus, the nozzle element 1 may comprise, for example, a concave recess 3.1 and, for example, a convex spray edge 10.1, thus having an asymmetrical concave-convex nozzle element profile.

[0163] like Figure 5 As shown, a distance d1, d2 (suitably a channel gap) may be defined between the dispensing edge 3.2 and the ejection edge 10.1, wherein the distance d1, d2 may increase along the dispensing edge 3.2, for example, by at least 1.2 times; 1.5 times; 2.0 times or 2.5 times. Figure 5 In the embodiment, the distances d1 and d2 increase from left to right, preferably continuously. For example, the distance d1 may be 3 mm, and the distance d2 may be 6 mm.

[0164] For example, the amount of material may at least partially increase, at least partially decrease, and / or at least partially remain substantially constant along the discharge opening 10 .

[0165] However, it is also possible, for example, that the amount of material increases along substantially the entire discharge opening 10 .

[0166] For example, the amount of material may increase substantially continuously, in particular at least by a factor of 1.2; 1.5; 2.0 or 2.5.

[0167] The further nozzle element 20 has in particular a substantially symmetrical distribution recess 21 for applying the material, wherein the distribution recess 21 preferably penetrates the further nozzle element 20 completely, such as Figure 3 shown.

[0168] The dispensing recess 21 of the further nozzle element 20 comprises a central recess 22 , projections 23 protruding on both sides outwardly and preferably substantially straight edge regions 24 . 1 , 24 . 2 located on both sides respectively between the projections 23 and the central recess 22 .

[0169] The central recess 22 comprises a central arc segment 22.1 and two outer arc segments 22.2 and 22.3 adjacent to the central arc segment 22.1.

[0170] like Figure 5 As shown, the dispensing edge 3.2 can be connected to the transition area between the first outer arc segment 22.2 and the first edge area 24.1 at the top with a first end. The dispensing edge 3.2 can be connected to the transition area between the central arc segment 22.1 and the second outer arc segment 22.3 at the bottom with a second end.

[0171] The dispensing recess 2 of the nozzle element 1 and the dispensing recess 21 of the further nozzle element 20 overlap with each other and / or form a common dispensing chamber for the applied material, which can also be Figure 5 It can be seen in.

[0172] The dispensing recess 2 of the nozzle element 1 is closed on the spray side (eg Figure 2 ), wherein the distribution recess 21 of the further nozzle element 20 is open on the injection side (e.g. Figure 3 The distribution recess 2 of the nozzle element 1 can open into a distribution recess 21 of a further nozzle element 20 perpendicularly to the nozzle element 1, in particular perpendicularly to the plate plane of the nozzle element 1, in particular at least partially in the central recess 22 and at least partially outside it (e.g. Figure 5 ).

[0173] Like the nozzle element 1 , the additional nozzle element 30 comprises a frontal, in particular convexly curved, spray edge 30 . 1 , but can alternatively also have a straight spray edge 30 . 1 .

[0174] from Figure 4For example, it can be seen that the additional nozzle element 30 can preferably be formed substantially identically to the nozzle element 1 in structure, so that the additional nozzle element 30 can have the features of the nozzle element 1 disclosed herein. Therefore, the disclosure related to the nozzle element 1 also applies to the additional nozzle element 30.

[0175] The distribution recess 2, recess 3.1, distribution edge 3.2, supply channel 4 and / or injection edge 10.1 of the nozzle element 1 and the distribution recess, recess, distribution edge, supply channel and / or injection edge 30.1 of the additional nozzle element 30.1 are aligned approximately flush with each other (in particular arranged essentially in the same manner) and / or extend essentially parallel to each other.

[0176] The discharge opening 10 extends between the ejection edge 10.1 of the nozzle element 1 and the ejection edge 30.1 of the additional nozzle element 30 and preferably at least partially between the projections 23 of the further nozzle element 20, for example Figure 1 and Figure 6 shown.

[0177] The nozzle arrangement 100 can have, for example, a center plane M, which is defined by the center axis A of the outlet opening 10 and which can be aligned orthogonally to the slot-shaped outlet opening 10 and / or orthogonal to an element plane of the nozzle element 1, a plate plane of a further nozzle element 20 and / or an additional nozzle element 30 or a general element plane.

[0178] The dispensing recess 2 , the recess 3 . 1 and / or the dispensing edge 3 . 2 of the nozzle element 1 can be formed asymmetrically, in particular asymmetrically with respect to the center plane M.

[0179] The outlet opening 10 , the ejection edge 10 . 1 of the first nozzle element 1 , the distribution recess 21 of the further nozzle element 20 and / or the ejection edge 30 . 1 of the additional nozzle element 30 may be formed substantially symmetrically, in particular with respect to the center plane M.

[0180] Figure 2 It is shown that, for example, the recess 3.1 and / or the dispensing edge 3.2 can have a chord C, wherein the chord C can have a chord angle α of less than 90°, 85° or 80° and / or greater than 55°, 60° or 65°, in particular relative to the center plane M. Figure 2 In FIG. 4 , as an example, the chord angle α is approximately 70°.

[0181] The nozzle device 100 generally works as follows:

[0182] Particularly viscous or highly viscous application materials have the property of seeking the path of least resistance through the nozzle assembly 100 .

[0183] The distance d1 (appropriately the channel gap) of the nozzle element 1 is shorter on one side of the outlet opening 10 (e.g. 3 mm) than on the other side (e.g. 6 mm), wherein the distances d1, d2 can vary, for example, depending on boundary conditions (e.g. viscosity of the applied material, desired layer thickness distribution, etc.).

[0184] The nozzle device 100 is on one side (e.g. Figure 5 The right side in the figure) is where the applied material produces more than the other side (e.g. Figure 5 greater flow resistance).

[0185] refer to Figure 5 , the application material flowing in from below first seeks a path at distance d1 (left), since it can flow out faster due to less flow resistance.

[0186] As the material flow increases, the spray jet S moves in the direction toward the distance d2 and is forced to pass through at the distance d2. This occurs because a backlog is formed in the nozzle device 100 due to the large material flow, and the application material cannot flow out quickly enough at the distance d1 with less flow resistance.

[0187] The pressure in the nozzle arrangement 100 increases and the application material is pushed outward at a distance d2 where there is greater resistance.

[0188] The layer thickness of the coating produced on the motor vehicle component 200 , in particular the application path, is asymmetrical in cross section.

[0189] The invention advantageously makes it possible, for example, to produce an application material having a cross-sectional variation (e.g. flattening or increasing) in thickness on a motor vehicle part 200 by means of a jet stream S, for example, by applying the material at an optimally set angle of, for example, approximately 90°, from the nozzle device 100 to the surface of the motor vehicle part 200.

[0190] The invention advantageously makes it possible to produce a sharp application edge at the top and a substantially continuously increasing application layer thickness from top to bottom at an ideal setting angle (eg about 90°) of the applicator with the nozzle device 100 relative to the motor vehicle component 200.

[0191] At the side edges of the applied object, there is usually an edge effect of the applied material on both sides, wherein Figure 5 In the embodiment shown, a smaller product edge will be generated at the right end of the discharge opening 10 than at the left end.

[0192] Figures 1 to 6An embodiment is concerned in which the projection 23 is essentially flush with the ejection edge 10.1 of the nozzle element 10 and the ejection edge 30.1 of the additional nozzle element 30, so that the projection 23 delimits the outlet opening 10 on the outside on both sides and / or there is no passage gap for the application material between the projection 23 and the ejection edge 10.1 of the nozzle element 1 and the ejection edge 30.1 of the additional nozzle element 30 on both sides.

[0193] Figure 7 An embodiment is shown in which the projection 23 is offset, in particular offset to the rear, relative to the ejection edge 10.1 of the nozzle element 1 and the ejection edge 30.1 of the additional nozzle element 30, so that a passage gap g (for example, with a height x preferably between 0.1 mm and 2.0 mm) for the coating material is produced on both sides. This can advantageously reduce the edge of the coating material generated on the motor vehicle component 200. Thus, for example, it is advantageously possible to save coating material at points that were previously usually considered to be overcoating.

[0194] The present invention can also be used for (for example Fig. 8A , 8B and 9) generating an asymmetric jet S and / or asymmetrically changing the jet width sb, sb1, sb2 of the jet S, preferably making the first jet width b1 on one side of the central axis A greater than the second jet width b2 on the other side relative to the central axis A of the discharge port 10, and / or the central axis of the jet S deviates from the central axis A of the discharge port 10.

[0195] The asymmetric spray jet S can be advantageously applied, for example, by the spray jet S deliberately bypassing a portion Z (e.g. a hole or a bolt) on the motor vehicle component 200, optionally in combination with an evasive movement of the nozzle device 100 (suitably generated by the application robot) (e.g. only about 2 mm to 4 mm), for example. Fig. 9 As shown. Fig. 9 In FIG. 1 , the arrow indicates the moving direction of the nozzle device 100 , wherein TCP stands for tool center point.

[0196] Refer to the following Figures 12 to 15 A nozzle device 100 according to another embodiment of the present invention will be described.

[0197] Figures 12 to 15 An embodiment is shown in which both nozzle elements shown have an asymmetrical distribution recess 2 / 21. Fig.12 The nozzle element shown may be designated as "nozzle element 1". Fig.13 The nozzle element shown may be designated as "additional nozzle element 20", but may also be designated as Fig.12 The nozzle element shown is designated as "additional nozzle element 20" and the Fig.13The nozzle element shown is designated as "Nozzle Element 1". For example, Fig.12 The nozzle element shown in FIG. 1 is referred to below as nozzle element 1. Fig.13 The nozzle element shown in FIG. 2 is referred to as further nozzle element 20 .

[0198] The further nozzle element 20 (suitably an inner plate) is preferably arranged between the nozzle element 1 (suitably an outer plate) and the additional nozzle element 30 (suitably an outer plate) (see for example, Figure 1 ), wherein the additional nozzle element 30 is structurally substantially identical to the nozzle element 1. The nozzle element 1, the further nozzle element 20 and the additional nozzle element 30 may preferably be clamped between two clamping parts.

[0199] The nozzle device 100 and / or the nozzle element 1 comprises an asymmetrical distributing recess 2 for applying material, preferably for distributing asymmetrical amounts of material along the outlet opening 10 and / or for delivering a variable, preferably continuously variable, amount of material along the outlet opening 10 .

[0200] The nozzle element 1 comprises a supply channel 4. The supply channel 4 has an inlet opening E for the application material on the front side of the nozzle element 1, wherein the inlet opening E and the outlet opening 10 are preferably aligned in opposite directions. The supply channel 4 opens into the dispensing recess 2 appropriately.

[0201] The nozzle device 100, in particular the nozzle element 1, comprises a particularly strip-shaped sickle-shaped distribution groove G for applying material, wherein the distribution groove G forms at least a part of the distribution recess 2, which extends in an arc shape, in particular appropriately narrows along its longitudinal extension.

[0202] The distribution groove G is delimited by a convex, preferably arc-shaped edge section 3.3 and a concave, preferably arc-shaped edge section 3.4 which, for example, extends opposite the convex edge section 3.3.

[0203] The convex edge segment 3 . 3 and the concave edge segment 3 . 4 are preferably part of the nozzle element 1 , but in other embodiments the convex edge segment 3 . 3 and / or the concave edge segment 3 . 4 may also be part of a further nozzle element 20 .

[0204] The concave edge section 3 . 4 may suitably correspond to a dispensing edge for applying material.

[0205] Furthermore, the distributing groove G can be delimited by a convex, preferably arc-shaped edge section X1 which, for example, extends opposite the concave edge section 3 . 4 .

[0206] The convex edge section X1 is preferably part of the further nozzle element 20 .

[0207] Thus, the distribution groove G can be delimited expediently by the concave edge section 3 . 4 and the convex edge section 3 . 3 of the nozzle element 1 and by the convex edge section X1 of the further nozzle element 20 .

[0208] The concave edge section 3.4 delimits the distribution groove G on the injection side, so that the distribution groove G is closed on the injection side. On the other hand, the distribution recess 21 is open on the injection side.

[0209] The convex edge segment 3 . 3 and the convex edge segment X1 preferably extend approximately parallel to one another and may be aligned, for example, approximately flush with one another along their longitudinal extension.

[0210] The convex edge section 3.3, X1 and the concave edge section 3.4 preferably have different radii of curvature.

[0211] The convex edge section 3.3 comprises a chord C, the chord angle α of which relative to the central plane M is less than 90° and greater than 55°. Fig.12 In the figure, the chord angle α is about 80°.

[0212] The convex edge segment X1 also includes a chord, the chord angle of which relative to the central plane M is, for example, less than 90° and greater than 55°. Fig.13 In the case of Fig.13 In FIG. 1 , the chord and the chord angle of the convex edge segment X1 are not provided with reference numerals.

[0213] The further nozzle element 20, in particular its dispensing recess 21, comprises, for example, a central recess 22, protrusions 23 protruding on the outside on both sides and two edge regions 24.1, 24.2, preferably a first edge region 24.1 and a second edge region 24.2, wherein the two edge regions are respectively arranged on both sides between the protrusion 23 and preferably the central recess 22.

[0214] The central recess 22 comprises a central arc segment 22.1 and two outer segments 22.2 and 22.3 adjacent to the central arc segment 22.1, namely a first outer segment 22.2 and a second outer segment 22.3. The outer segments 22.2 and 22.3 are formed as linear segments, for example.

[0215] The convex edge segment 3.3 and the convex edge segment X1 are arranged between the first edge area 24.1 and the second edge area 24.2, wherein the convex edge segment 3.3 and the convex edge segment X1 are appropriately spaced apart from the first edge area 24.1 in space to form a channel for applying the material, but can preferably be connected to the second edge area 24.2 to avoid creating a channel for applying the material for the second edge area 24.2.

[0216] The supply channel 4 , the distribution groove G and the distribution recess 2 extend completely orthogonally through the nozzle element 1 , so that the nozzle element 1 is completely penetrated orthogonally to its element plane.

[0217] The dispensing recess 21 passes completely orthogonally through the further nozzle element 21 , so that the further nozzle element 21 is completely penetrated orthogonally to its element plane.

[0218] Figures 12 to 15 An embodiment is shown in which the nozzle device 100 , preferably the dispensing recess 2 including the dispensing groove G, generates different path resistances for the application material, according to which the application material is dispensed along the discharge opening 10 .

[0219] Here, the application material is preferably caused to flow through the distribution recess 2 and / or the distribution groove G in the longitudinal direction of the distribution recess 2 and / or the distribution groove G and to leave the distribution groove 2 and / or the distribution groove G transversely to the longitudinal direction, wherein the distribution recess 2 and / or the distribution groove G produce in particular different path resistances for the application material.

[0220] refer to Fig.15 , the principles of different path resistances are mainly as follows:

[0221] In particular, viscous or highly viscous application materials have the property of seeking the path of least resistance through the nozzle assembly 100 .

[0222] The applied material along arrow A has a shorter and / or less resistance path and can flow out without resistance.

[0223] The applied material along arrows B and C has a longer path and therefore has a greater resistance when flowing out.

[0224] Applied material along arrows B, C, D, E has a longer path and therefore has a greater resistance.

[0225] The applied material along arrows B, C, D, E, F has the longest path and therefore also has the greatest resistance.

[0226] Therefore, the application material along the arrows C, D, E, F is appropriately reduced along the discharge port 10 .

[0227] The reduction in the amount of applied material is associated with a narrowing (constriction) of the dispensing groove G and thus of the dispensing recess 2 .

[0228] exist Fig.15 In the embodiment of the present invention, the application material is preferably introduced into the distribution recess 2 and / or the distribution groove G through the open front side SF of the distribution recess 2 and / or the distribution groove G. Here, the longitudinal side LS of the distribution recess 2 and / or the distribution groove G can preferably be closed, so that preferably no application material is introduced through the longitudinal side LS.

[0229] In the following, reference is made to Figures 16 to 19 A nozzle device 100 according to another embodiment of the present invention will be described.

[0230] Fig.16 The nozzle element 1 shown in the figure comprises an asymmetrical distribution recess 2, but also comprises the features assigned to the other nozzle elements in the previously explained embodiments. Fig.16 The nozzle element shown may be designated as "Nozzle Element 1", but may also be designated as Fig.16 The nozzle element shown is designated as "additional nozzle element 20". For example, Fig.16 The nozzle element shown is hereinafter referred to as "nozzle element 1". Fig.17 The nozzle element shown is referred to as “further nozzle element 20 ”.

[0231] The nozzle element 1 (suitably an inner plate) is preferably arranged between a further nozzle element 20 (suitably an outer plate) and an additional nozzle element 30 (suitably an outer plate) (see e.g. Figure 1 ), wherein the additional nozzle element 30 is formed structurally substantially identically to the further nozzle element 20. The nozzle element 1, the further nozzle element 20 and the additional nozzle element 30 may preferably be clamped between two clamping parts.

[0232] The nozzle arrangement 100 and / or the nozzle element 1 comprises an asymmetrical distributing recess 2 for applying material, preferably in order to asymmetrically distribute the material amount along the outlet 10 and / or to deliver a varying, preferably continuously varying, amount of material along the outlet 10 .

[0233] The nozzle device 100 comprises a sickle-shaped, in particular strip-shaped, distributing groove G for applying material, wherein the distributing groove G forms at least a part of the distributing recess 2, which extends in an arc shape and in particular tapers appropriately along its longitudinal extension.

[0234] The distribution groove G is delimited by a convex, preferably arc-shaped edge section X1 and a concave, preferably arc-shaped edge section X2 which, for example, extends opposite the convex edge section X1 .

[0235] The convex edge segment X1 is preferably a part of the nozzle element 1 , but in other embodiments, the convex edge segment X1 may also be a part of a further nozzle element 20 .

[0236] The concave edge section X2 is preferably part of the further nozzle element 20 .

[0237] The distribution groove G is therefore delimited by the concave edge section X2 of the further nozzle element 20 and by the convex edge section X1 of the nozzle element 1 .

[0238] The radii of curvature of the convex edge segment X1 and the concave edge segment X2 are significantly different.

[0239] The concave edge section X2 delimits the distribution recess 21 and / or the distribution groove G on the injection side, so that the distribution recess 21 and / or the distribution groove G are closed on the injection side. On the other hand, the distribution recess 21 is open on the injection side.

[0240] The convex edge segment X1 includes a chord C, whose chord angle α relative to the central plane M is less than 90° and greater than 55°. Fig.16 In the example, the chord angle α is approximately 70°.

[0241] The further nozzle element 20 has a supply channel 4 for supplying application material, wherein the supply channel 4 appropriately opens into the dispensing recess 21. The supply channel 4 preferably comprises an inlet opening E at the front end of the further nozzle element 20 for the application material.

[0242] The further nozzle element 20 comprises a particularly symmetrical dispensing recess 21. The dispensing recess 21 is bounded by two side edges 25.1, 25.2 and a concave edge section X2. The two side edges 25.1, 25.2 widen towards the concave edge section X2 and connect both sides to the concave edge section X2.

[0243] Figures 16 to 19 An embodiment is shown in which the nozzle device 100 , preferably the dispensing recess 2 comprising the dispensing groove G, generates different gap resistances for the application material, according to which the application material is dispensed along the discharge opening 10 .

[0244] Here, the application material is preferably made to flow into the distribution recess 2 and / or the distribution groove G transversely to the longitudinal direction of the distribution recess 2 and / or the distribution groove G, and after changing direction, leave the distribution recess 2 and / or the distribution groove G transversely to the longitudinal direction, wherein the distribution groove 2 and / or the distribution groove G specifically produces different gap resistances for the application material.

[0245] Functional principle of different gap resistances, see Fig.19 , roughly as follows:

[0246] In particular, viscous or highly viscous application materials have the property of seeking the path of least resistance through the nozzle assembly 100 .

[0247] The applied material along arrow A has a shorter and / or less resistance path and can flow out without resistance.

[0248] The application material along the arrows B, C and D must be forced through the distribution groove G between the nozzle element 1 (in particular the middle plate) and the further nozzle element 20 (outer plate) before it can exit from the discharge opening 10 .

[0249] The distribution groove G between the nozzle element 1 (in particular the middle plate) and the further nozzle element 20 (in particular the outer plate) is reduced from the dimension M1 by x mm to the dimension M2.

[0250] Therefore, due to the increased (gap) resistance in the material flows B, C, D, the amount of applied material will be appropriately reduced.

[0251] exist Fig.19 In the embodiment, the coating material is preferably introduced into the distribution recess 2 and / or the distribution groove G through the open longitudinal side LS (and optionally the open front side FS) of the distribution recess 2 and / or the distribution groove G so as to appropriately distribute the material amount asymmetrically along the discharge outlet 10 and / or output the material amount that varies, preferably continuously, along the discharge outlet 10.

[0252] The invention is not limited to the preferred embodiments described above. On the contrary, the invention also includes variants and modifications that also utilize the inventive concept and therefore belong to the scope of protection. In particular, the invention also claims protection for the features of the subject matter and the dependent claims, which are independent of the features of the respective claims mentioned, in particular also independent of the features of the main claim. Therefore, the invention includes various aspects of the invention, which enjoy protection independently of each other.

[0253] Reference numerals list

[0254] 1 Nozzle element

[0255] 2 Dispensing recess of the nozzle element

[0256] 3.1 Recesses of nozzle elements

[0257] 3.2 Dispensing edge of the nozzle element

[0258] 10.1 Spray edge, in particular spray edge of nozzle element and / or nozzle element

[0259] 10 discharge port, preferably a slot-shaped discharge port

[0260] A. The center axis of the discharge port

[0261] M center plane

[0262] 20 additional nozzle elements

[0263] 21 Dispensing recess of the additional nozzle element

[0264] 22 Central recess

[0265] 22.1 Central arc segment

[0266] 22.2 First outer segment, in particular an arcuate segment or a linear segment

[0267] 22.3 Second outer segment, especially an arcuate segment or a linear segment

[0268] 23 bulge

[0269] 24.1 First marginal area

[0270] 24.2 Second marginal area

[0271] 25.1 Side edges

[0272] 25.2 Side edge

[0273] 30 Additional nozzle elements

[0274] 30.1 Spray edge of additional nozzle element

[0275] 100 nozzle set

[0276] G Channel Gap

[0277] S Jet

[0278] sb jet width of the injection jet, preferably the total jet width

[0279] sb1 first jet width

[0280] sb2 second jet width

[0281] C String

[0282] α Chord angle

[0283] 200 Motor vehicle parts

[0284] Z Parts of motor vehicle components that do not require coating

[0285] G Distribution slot

[0286] X1 Convex edge section, in particular a convex edge section of a nozzle element and / or a further nozzle element

[0287] X2 concave edge segment, in particular a concave edge segment of a further nozzle element 3.3 convex edge segment, in particular a convex edge segment of a nozzle element

[0288] 3.4 Concave edge segments, in particular concave edge segments of nozzle elements

[0289] E Entrance

[0290] FS front

[0291] LS longitudinal side

Claims

1. A nozzle device (100) for outputting a spray jet (S) of a coating material, comprising a preferably groove-shaped and / or convexly curved discharge opening (10) for the coating material and a nozzle element (1), characterized in that: The nozzle device (100) and / or the nozzle element (1) has an asymmetrical distribution recess (2) for applying material, preferably to distribute the material amount asymmetrically along the discharge opening (10) and / or to output a variable, preferably continuously variable, material amount along the discharge opening (10).

2. The nozzle device (100) according to claim 1, characterized in that The dispensing recess (2) has a recess (3.1), preferably a concave recess (3.1), for applying material.

3. The nozzle device (100) according to claim 1 or 2, characterized in that: The dispensing recess (2) has a dispensing edge (3.2) for application material, via which the application material can be supplied to the discharge opening (10).

4. The nozzle device (100) according to claim 2 or 3, characterized in that The recess (3.1) and / or the dispensing edge (3.2) at least partially extends along a straight line, at least partially comprises an arc shape with a constant curvature and / or at least partially comprises an arc shape with a preferably continuously varying curvature.

5. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle element (1) has a straight or convexly curved spray edge (10.1).

6. The nozzle device (100) according to any one of the preceding claims, characterized in that - the amount of material increases along the discharge opening (10), preferably substantially continuously, in particular at least by a factor of 1.2; 1.5; 2.0; 2.5; or 3.0, and / or A distance (d1, d2) is defined between the dispensing edge (3.2) and the ejection edge (10.1), the distance (d1, d2) increasing along the dispensing edge (3.2) by at least 1.2 times; 1.5 times; 2.0 times; 2.5 times; or 3.0 times.

7. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle device (100) has a preferably sickle-shaped distribution groove (G) for applying material, wherein the distribution groove (G) forms a part of the distribution recess (2) and extends in an arc shape and / or tapers along its longitudinal extension.

8. The nozzle device (100) according to claim 7, characterized in that The distribution groove (G) is bounded by a convex, preferably arc-shaped edge section (3.3, X1) and a concave, preferably arc-shaped edge section (3.4, X2).

9. The nozzle device (100) according to claim 8, characterized in that - the convex edge segment (3.3, X1) has a longitudinal extension and the concave edge segment (3.4, X2) has a longitudinal extension, wherein the longitudinal extension of the convex edge segment (3.3, X1) is smaller than the longitudinal extension of the concave edge segment (3.4, X2), and / or The convex edge section (3.3, X1) and the concave edge section (3.4, X2) have different radii of curvature.

10. The nozzle device (100) according to any one of the preceding claims, characterized in that The dispensing recess (2), the dispensing groove (G), the recess (3.1), the dispensing edge (3.2), the concave edge section (3.4, X2) and / or the convex edge section (3.3, X1) are bent toward the discharge opening (10).

11. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle device (100), preferably the distribution recess (2), the distribution groove (G), the recess (3.1) and / or the distribution edge (3.2) generate different gap resistances, path resistances and / or flow resistances for the application material, and the application material is preferably distributed along the discharge outlet (10) according to the gap resistance, path resistance and / or flow resistance.

12. The nozzle device (100) according to any one of the preceding claims, characterized in that - the application material flows through the distribution recess (2) and / or the distribution groove (G) in the longitudinal direction of the distribution recess (2) and / or the distribution groove (G) and leaves the distribution recess (2) and / or the distribution groove (2) transversely to the longitudinal direction; or - the application material flows into the distribution recess (2) and / or the distribution groove (G) transversely to the longitudinal direction of the distribution recess (2) and / or the distribution groove (G), and leaves the distribution recess (2) and / or the distribution groove (G) transversely to the longitudinal direction.

13. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle device (100) has a further nozzle element (20), which comprises: - a preferably substantially symmetrical or asymmetrical distribution recess (21) for applying the material, and / or - Straight or convexly curved spray edge (10.1).

14. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle element (1) and / or the further nozzle element (20) has a supply channel (4) for supplying application material, wherein the supply channel (4) opens into a distribution recess (2) of the nozzle element (1) and / or a distribution recess (21) of the further nozzle element (20).

15. The nozzle device (100) according to claim 13 or 14, characterized in that The dispensing recess (2) of the nozzle element (1) and the dispensing recess (21) of the further nozzle element (20) overlap with each other and / or form a common dispensing chamber for applying material.

16. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle element (1) and / or the further nozzle element (20) has: -Central recess (22), - protruding projections (23) on both sides and on the outside, and / or - Two edge regions (24.1, 24.2), preferably a first edge region (24.1) and a second edge region (24.2), which are arranged on both sides, preferably between the projection (23) and the central recess (22).

17. The nozzle device (100) according to claim 16, characterized in that The central recess (22) comprises a central arc segment (22.1) and two outer segments (22.2, 22.3) adjacent to the central arc segment (22.1), namely a first outer segment (22.2) and a second outer segment (22.3), wherein preferably, the outer segments (22.2, 22.3) are arc segments or linear segments.

18. The nozzle device (100) according to any one of the preceding claims, characterized in that the distribution recess (2) and / or the distribution groove (G) of the nozzle element (1) is open or closed on the spray side and preferably opens orthogonally to the nozzle element (1) into the distribution recess (21) of the further nozzle element (20), and / or The dispensing recess (21) of the further nozzle element (20) is open or closed on the spray side.

19. The nozzle device (100) according to any one of the preceding claims, characterized in that - the supply channel (4), the distribution groove (G) and / or the distribution recess (21) extend completely orthogonally through the nozzle element (1), and / or The supply channel (4), the distribution groove (G) and / or the distribution recess (21) extend completely orthogonally through the further nozzle element (20).

20. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle arrangement (100) comprises an additional nozzle element (30) having a straight or convexly curved spray edge (30.1).

21. The nozzle device (100) according to claim 20, characterized in that The additional nozzle device (30) is designed to be structurally identical to the nozzle element (1) or the further nozzle element (20).

22. The nozzle device (100) according to claim 20 or 21, characterized in that - the further nozzle element (20) is arranged between the nozzle element (1) and the additional nozzle element (30), or The nozzle element (1) is arranged between the further nozzle element (20) and the additional nozzle element (30).

23. The nozzle device (100) according to any one of claims 20 to 22, characterized in that the dispensing recess (2) of the nozzle element (1) and / or the dispensing recess (21) of the further nozzle element (20) and the identically designed recess of the additional nozzle element (30) are aligned flush with one another and / or extend approximately parallel to one another, - the ejection edge (10.1) of the nozzle element (1) and / or the ejection edge (10.1) of the further nozzle element (20) and the ejection edge (30.1) of the additional nozzle element (30.1) are aligned flush with one another and / or extend approximately parallel to one another, and / or The outlet opening (10) extends between a spray edge (10.1) of the nozzle element (10) or a spray edge (10.1) of the further nozzle element (20) and a spray edge (30.1) of the additional nozzle element (30).

24. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle device (100) has a center plane (M) which is defined by a center axis (A) of the discharge opening (10) and is aligned orthogonally to the discharge opening (10) and / or to an element plane of the nozzle element (1).

25. The nozzle device (100) according to claim 24, characterized in that - the dispensing recess (2), the recess (3.1), the convex edge section (3.3, X1), the dispensing groove (G) and / or the dispensing edge (3.2) of the nozzle element (1) are formed asymmetrically with respect to the center plane (M), and / or The dispensing recess (21), the convex edge section (3.3, X1) and / or the concave edge section (3.4, X2) of the further nozzle element (20) are designed asymmetrically or symmetrically with respect to the center plane (M).

26. The nozzle device (100) according to any one of claims 16 to 25, characterized in that the projection (23) is arranged substantially flush with the ejection edge (10.1) of the nozzle element (1), the ejection edge (10.1) of the further nozzle element (20) and / or the ejection edge (30.1) of the additional nozzle element (30.1), or The projection (23) is arranged offset from the ejection edge (10.1) of the nozzle element (1), the ejection edge (10.1) of the further nozzle element (20) and / or the ejection edge (30.1) of the additional nozzle element (30.1) to produce a passage gap (g) for the applied material.

27. The nozzle device (100) according to any one of the preceding claims, characterized in that At least one of the following is particularly centrally aligned and / or symmetrically formed with respect to the center plane (M): - said discharge opening (10), - a spray edge (10.1) of the nozzle element (1) and / or of the further nozzle element (20), - a dispensing recess (21) of the further nozzle element (20), a concave edge section (3.4, X2) of the nozzle element (1) and / or of the further nozzle element (20), - two edge regions (24.1, 24.2) of the nozzle element (1) and / or of the further nozzle element (20), - two projections (23) of the nozzle element (1) and / or of the further nozzle element (20), - a supply channel (4) of the nozzle element (1) and / or of the further nozzle element (20), and / or - the spray edge (30.1) of the additional nozzle element (30).

28. The nozzle device (100) according to any one of claims 24 to 27, characterized in that The dispensing recess (2), the recess (3.1), the dispensing edge (3.2), the dispensing groove (G) and / or the convex edge section (3.3, X1) have a chord (C), and - said chord (C) has a chord angle (α) with respect to said central plane (M) which is smaller than 90°, 85° or 80° and / or larger than 55°, 60° or 65°.

29. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle element (1) is a nozzle plate, the further nozzle element (20) is a nozzle plate and / or the additional nozzle element (30) is a nozzle plate.

30. The nozzle device (100) according to any one of the preceding claims, characterized in that The application material is a viscous or highly viscous application material.

31. The nozzle device (100) according to any one of the preceding claims, characterized in that The nozzle arrangement (100) is configured to distribute an asymmetric or substantially symmetric spray jet (S).

32. A painting robot having a nozzle arrangement (100) according to any one of the preceding claims.

33. A coating method for distributing a spray jet (S) of coating material onto a motor vehicle part (200) using a nozzle device (100), preferably performed using a nozzle device (100) according to any one of claims 1 to 31 or a coating robot according to claim 32, wherein: The nozzle device (100) has a discharge port (10) for applying material and a nozzle element (1), characterized in that the nozzle device (100) and / or the nozzle element (1) have an asymmetrical distribution recess (2) for applying material, so that the amount of material is asymmetrically distributed along the discharge port (10) and / or the amount of material that varies along the discharge port (10) is output.

34. The coating method according to claim 33, characterized in that An application path with a varying, preferably continuously varying, layer thickness of the applied material is produced on the motor vehicle component (200), preferably with a layer thickness of the applied material that increases or decreases continuously from top to bottom.

35. The coating method according to claim 34, characterized in that The application path: - is asymmetric in cross section, - is curved in cross section, and / or -Terminates with a sharp application edge.

36. The coating method according to any one of claims 33 to 35, characterized in that A plurality of application paths with a varying, in particular continuously varying, layer thickness of the applied material are produced on the motor vehicle component (200), wherein adjacent application paths overlap one another, in particular producing an approximately constant applied layer thickness.

37. The coating method according to any one of claims 33 to 36, characterized in that The injection jet (S) is formed asymmetrically.

38. The coating method according to any one of claims 33 to 37, characterized in that Preferably, according to the volume flow rate of the coating material, the spray jet (S) changes asymmetrically and / or the jet width (sb, sb1, sb2) of the spray jet (S) changes asymmetrically, preferably so that, relative to the central axis (A) of the discharge port (10), the first jet width (b1) on one side of the central axis (A) is greater than the second jet width (b2) on the other side of the central axis (A), and / or the central axis of the spray jet (S) deviates from the central axis (A) of the discharge port (10).

39. The coating method according to any one of claims 33 to 38, characterized in that The discharge opening (10) and its central axis (A) have a setting angle of between 85° and 95°, preferably approximately 90°, relative to the coating surface of the motor vehicle component (200) during the dispensing of the coating material.

40. The coating method according to any one of claims 33 to 39, characterized in that The motor vehicle component (200) is curved and / or is a sill and / or the spray jet (S) is applied to a convexly curved surface of the motor vehicle component (200).

41. The coating method according to any one of claims 33 to 40, characterized in that - the coating produced on the motor vehicle component (200) has a greater or smaller layer thickness in the lower region of the motor vehicle component (200) than in the upper region of the motor vehicle component (200), and / or The layer thickness of the coating produced on the motor vehicle component (200) decreases or increases, in particular continuously, from a lower region of the motor vehicle component (200) to an upper region of the motor vehicle component (200).

Images