EP3888803A1 - Media dispensing device, media application system, method for targeted dispensing of a medium by means of a media dispensing device and use of a media dispensing device to apply a paint - Google Patents

Abstract

The invention is based on a media dispensing device (12a), in particular a spray or print head, for a media application system (10a), with at least one media dispensing element (40a), in particular a membrane, which is provided to vibrate in a targeted manner The media output element (40a) delimits a plurality of output openings (54a). It is proposed that the output openings (54a) in an at least substantially concentric arrangement, in particular on at least one circular ring, in at least one quincunx arrangement, hexagonally and / or square, are arranged around a central axis (58a) of the media output element (40a).

Description

State of the art

A media output device, in particular a spray or print head, for a media application system, with at least one media output element has already been proposed, the media output element being intended to be excited to vibrate for a targeted output of a medium and wherein the media output element delimits a multiplicity of output openings .

Disclosure of the invention

The invention is based on a media dispensing device, in particular a spray or print head, for a media application system, with at least one media dispensing element, in particular a membrane, which is intended to be excited to vibrate for a targeted dispensing of a medium, the media dispensing element having a plurality of Limited output openings.

It is proposed that the output openings are arranged in an at least essentially concentric arrangement, in particular on at least one circular ring, in at least one quincunx arrangement, hexagonal and / or square, around a central axis of the media output element.

A "substantially concentric arrangement" is to be understood in particular as an arrangement of objects and / or recesses, in particular the output openings, the objects and / or recesses around a common axis or a common point, in particular the central axis of the media output element, in particular symmetrically and / or are arranged uniformly distributed. In particular, the objects and / or recesses are distributed symmetrically about the common axis or the common point. Preferably, especially if the objects and / or recesses are arranged in several rows around the common axis or the common point, all objects and / or recesses in one of the rows have the same minimum distance from the common axis or the common point. It is conceivable that the rows of objects and / or recesses, in particular viewed radially to the common axis, each have the same or different distances from one another. The objects and / or recesses, in particular the output openings, are preferably arranged on at least one imaginary ring, in particular several imaginary rings, with the axis, in particular the central axis of the media output element, as the center, the objects and / or recesses of a ring being evenly distributed the ring are arranged. In particular, the media output element, in particular within a ring, delimits at least 5, preferably at least 10, preferably at least 20 and particularly preferably at least 30, output openings. The at least essentially concentric arrangement is particularly preferably embodied differently from a matrix arrangement, in particular in rows and columns. Preferably, all of the output openings delimited by the media output element are arranged in the at least substantially concentric arrangement around the central axis of the media output element. In particular, the media output element does not limit any further recesses and / or openings in addition to the output openings. The at least essentially concentric arrangement of the dispensing openings is preferably provided so that a quantity of the medium dispensed via the individual dispensing openings is at least essentially identical for all dispensing openings. “Provided” is to be understood in particular to be specially designed and / or specially equipped. Including that an object, in particular the media output element, has a specific function, in particular is intended to be excited to vibrate for the targeted output of the medium, it is to be understood in particular that the object fulfills and / or executes this specific function in at least one application and / or operating state. It is conceivable that the output openings, in particular all of the output openings delimited by the media output element, are arranged within a circular area around the central axis of the media output element. In addition, it is conceivable that the output openings, in particular all of the output openings delimited by the media output element, are arranged within the annular region in a quincunx arrangement, hexagonal and / or square. The media output element is preferably provided to carry out radially concentric vibrations with respect to the output of the medium, in particular with regard to the central axis of the media output element, the output openings in particular vibrating with the media output element. In particular, the output openings, in particular all output openings delimited by the media output element, have a minimum distance from the central axis of the media output element of at most 6 mm, in particular at most 4 mm, preferably at most 3 mm, preferably at most 2 mm and particularly preferably at most 1.7 mm.

Preferably, the media output element is at least partially elastic, in particular elastically deformable, in particular can be excited to vibrate. The medium can preferably be dispensed by means of the dispensing openings when the medium dispensing element vibrates. The output openings are designed in particular as a perforation or hole in the media output element. A configuration, in particular a shape, of the individual output openings is preferably independent of the at least substantially concentric arrangement of the output openings on the media output element. The media output element is designed in particular as an ultrasonic membrane, an ultrasonic plate or the like. The media output element, viewed in a main extension plane of the media output element, is preferably configured in the shape of a circular surface or a circular ring. A “main extension plane” of a structural unit, in particular of the media output element, is to be understood in particular as a plane which is parallel to a largest side surface of a smallest imaginary cuboid that the structural unit is just completely encloses, and which runs in particular through the center of the cuboid. Alternatively, it is conceivable that the media output element, viewed in the main plane of extent of the media output element, is elliptical, polygonal, for example, square or triangular, or the like. The media output device preferably comprises at least one actuator element which is provided to vibrate the media output element for the targeted output of the medium. The actuator element is preferably designed as a piezo element, in particular as a piezo crystal. In particular, the actuator element designed as a piezo element changes its shape as a result of the application of an electrical voltage to the actuator element, which in particular leads to a vibration of the media output element due to a mechanical coupling of the actuator element to the media output element. Alternatively, it is conceivable that the actuator element is designed as a MEMS actuator (micro-electromechanical system actuator), as an ultrasonic converter or as another actuator element that appears useful to a person skilled in the art. The media output device preferably comprises at least one control and / or regulating unit for controlling and / or regulating the actuator element. A “control and / or regulating unit” is to be understood as meaning, in particular, a unit with at least one control electronics. “Control electronics” should be understood to mean, in particular, a unit with a processor unit and with a memory unit and with an operating program stored in the memory unit. In addition, it is conceivable that the media output device comprises at least one further actuator element which is arranged on the media output element, in particular on a side of the media output element facing away from the actuator element. The actuator element and the further actuator element are preferably provided to stimulate the media output element together to output the medium. In particular, the actuator element and the further actuator element are arranged coaxially to one another, in particular around a common central axis and / or around the central axis of the media output element. The actuator element and the further actuator element are preferably designed at least substantially identical and / or structurally identical.

The central axis of the media output element is preferably aligned at least substantially perpendicular to the main plane of extent of the media output element. “Essentially perpendicular” is to be understood as meaning, in particular, an alignment of a straight line, a plane or a direction, in particular the central axis of the media output element, relative to another straight line, another plane or a reference direction, in particular the main plane of extent of the media output element, the straight line , the plane or the direction and the other straight line, the other plane or the reference direction, especially viewed in a projection plane, enclose an angle of 90 ° and the angle includes a maximum deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °.

The media output element is preferably provided to receive the medium when it vibrates via contact with a media transfer element of the media application system and to output it in an output direction of the media output element and / or in a conical output area during the vibration. In particular, the output direction and / or a central axis of the conical output region are / is oriented at least substantially parallel to the central axis of the media output element. "Essentially parallel" should in particular mean an alignment of a straight line, a plane or a direction, in particular the output direction and / or the central axis of the conical output area, relative to another straight line, another plane or a reference direction, in particular the central axis of the media output element, are understood, the straight line, the plane or the direction compared to the other straight line, the other plane or the reference direction, especially viewed in a projection plane, a deviation of in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. The media output element preferably comprises at least one receiving surface and at least one output surface. The receiving surface and the output surface, viewed along the central axis of the media output element, are preferably arranged on two outer sides of the media output element arranged one behind the other. In particular, the output surface is arranged on a side of the media output element pointing in the output direction. The receiving surface is preferably on arranged on a side of the media output element facing away from the output surface. Preferably, the receiving surface and the output surface are at least partially formed and / or aligned at least substantially perpendicular to the central axis of the media output element. The receiving surface is preferably provided to interact with the media transfer element to receive the medium when the media output element vibrates, with the media output element in particular resting at least partially on the media transfer element via the receiving surface. The media output element preferably has a maximum transverse extent, in particular at least substantially perpendicular to the central axis of the media output element, which in particular has a value from a value range between 10 mm and 30 mm, preferably between 13 mm and 26 mm and preferably between 16 mm and 22 mm , is equivalent to. The actuator element preferably has a maximum transverse extent, in particular at least substantially perpendicular to the central axis of the media output element, which in particular has a value from a value range between 6 mm and 30 mm, preferably between 10 mm and 25 mm and preferably between 12 mm and 20 mm , is equivalent to. The actuator element preferably has a maximum inner diameter, in particular at least substantially perpendicular to the central axis of the media output element, which in particular has a value from a value range between 4 mm and 28 mm, preferably between 6 mm and 20 mm and preferably between 8 mm and 15 mm , is equivalent to.

The output openings preferably extend over a maximum thickness of the media output element, in particular from the output surface to the receiving surface. The output openings, in particular inner surfaces of the media output element delimiting the output openings, are each delimited by the output surface and the receiving surface. In particular, the dispensing openings on a side of the dispensing openings facing the dispensing area each have a different cross-sectional area than on a side of the dispensing openings facing the receiving area. The dispensing openings each preferably have at least one central axis, each of which is in particular aligned at least substantially perpendicular to the receiving surface and / or the dispensing surface. The dispensing openings preferably have in particular with regard to the central axes of the dispensing openings, in the dispensing surface and in the receiving surface, one, in particular the same, at least substantially concentric arrangement in each case.

The medium is particularly preferably designed as a color, in particular a pigment mixture, a solution of pigments or the like. The media output device is preferably provided for use with the ink, in particular for a directed and / or regulated delivery of the ink. It is also conceivable that the medium is designed as a fluid different from one color, such as, for example, a care product, a varnish, a fertilizer, a plant protection product or the like. Particularly preferably, the media output device and / or the media application system is not intended for a medical application and / or is designed differently from a medical device. The media output device and / or the media application system is preferably provided for spraying and / or printing liquid media, in particular paint.

The design of the media dispensing device according to the invention enables an advantageously uniform and directed dispensing of the medium by means of the media dispensing element. An advantageously direct and precise control of output parameters, in particular a spray angle, a fluid quantity, a homogeneity or the like, of the media output element, in particular for spraying and / or printing, for example of resolution-optimized structures, in particular dots, can be achieved. An advantageously uniform application of a medium, in particular a paint, to a surface can be made possible by means of the media output element.

Furthermore, it is proposed that the output openings have a minimum distance from one another which corresponds to ten to twenty times, in particular twelve to sixteen times, a maximum output opening diameter of the output openings, the media output element being intended for use with the medium which, in particular under standard conditions , has a viscosity function which has a value between 2 mPas and 40 mPas, preferably between 4 mPas and 25 mPas and preferably between 5 mPas and 13 mPas. An advantageously precise setting of output parameters, in particular a spray angle, an amount of fluid, a homogeneity or the like, can take place as a function of a type of medium. Unwanted deposits of the medium on the media output element, which in particular can negatively influence the formation of a spray and / or the formation of satellite droplets, can advantageously be prevented. The minimum spacing / spacing of the output openings preferably extend at least substantially parallel to the main plane of extent of the media output element and / or at least substantially perpendicular to the central axis of the media output element. The dispensing openings preferably each have an at least substantially round, in particular circular, cross-sectional area. The maximum output opening diameter preferably corresponds to a value from a value range from 10 µm to 60 µm, preferably from 15 µm to 40 µm, preferably from at least substantially 20 µm to 30 µm and particularly preferably from at least substantially 30 µm. In particular, the maximum output opening diameter is designed as a diameter of a cross-sectional area of the output openings. The maximum output opening diameter (s) preferably extend at least substantially parallel to the main plane of extent of the media output element and / or at least substantially perpendicular to the central axis of the media output element. The minimum distance between the output openings preferably corresponds to a value from a value range between 100 μm and 1200 μm, preferably between 150 μm and 800 μm, preferably between 200 μm and 600 μm and particularly preferably between 260 μm and 480 μm. The dispensing openings particularly preferably have a minimum distance from one another which corresponds to ten to twenty times, in particular twelve to sixteen times, the maximum dispensing opening diameter of the dispensing openings.

In addition, it is proposed that the media output element have an at least substantially closed surface in a vicinity of the central axis, which surface is in particular free of output openings and / or is arranged in particular in the region of a curvature of the media output element. An advantageously homogeneous spray jet of the medium can be made possible during the dispensing by means of the media dispensing element. Under "essentially closed "is to be understood in particular as a surface, in particular the surface of the media output element, which is continuously formed between the outer contours delimiting the surface, in particular free of recesses. In particular, the surface extends within, in particular centrally, the at least essentially concentric arrangement of the output openings A "near area" of an object, in particular the central axis of the media output element, is to be understood in particular as an area which is within a minimum distance around the body of at most 2 mm, preferably at most 1 mm, preferably at most 0.5 mm and particularly preferred at most 0.2 mm, the at least substantially closed surface is preferably arranged in such a way that the central axis of the media output element runs centrally through the surface.

It is further proposed that the media output element has at least one, in particular the aforementioned, output surface which at least partially delimits the output openings, the output surface being at least substantially liquid-repellent, wherein in particular the output surface is at least partially in the area of one, in particular the aforementioned, Curvature of the media output element is arranged. Advantageously, good wetting properties of the media output element can be achieved with regard to a type of medium. Unwanted deposits of the medium on the media output element, which in particular can negatively influence the formation of a spray and / or the formation of satellite droplets, can advantageously be prevented. "Essentially liquid-repellent" is to be understood in particular as a surface, in particular the dispensing area, which is at least partially formed from non-polar substances such as fat, wax, alkanes, alkenes or the like, and / or at least one layer of at least one having non-polar material, which covers the surface. The surface is preferably designed to be repellent with respect to the medium, a hydrophobic effect being observed in particular when the medium comes into contact with the output surface. In particular, the dispensing area is at least largely, in particular at least essentially completely, at least essentially liquid-repellent. The output surface is preferably designed to be at least substantially liquid-repellent at least in an area around the central axis of the media output element, which comprises at least the dispensing openings. Alternatively or additionally, it is conceivable that the receiving surface is designed to be at least essentially liquid-repellent. Alternatively or additionally, it is conceivable that the inner surfaces of the media output element delimiting the output openings are designed to be at least essentially liquid-repellent.

It is also proposed that the dispensing openings are at least partially frustoconical. Advantageously, good properties of the media output element can be achieved with regard to receiving and / or dispensing the medium through the output openings in the event of a vibration-induced movement of the media output element. An advantageously high uptake and / or release rate of the medium can be achieved by the media output element, in particular by an, in particular porous, media transfer element of the media application system. In particular, the inner surfaces of the media output element delimiting the output openings are formed at least partially obliquely to the central axis of the media output element and / or the output openings and to the main plane of extent of the media output element. The dispensing openings are preferably each designed to be frustoconical over a maximum thickness of the dispensing openings. Alternatively, it is conceivable that the dispensing openings, each along the central axes of the dispensing openings, are only partially frustoconical and in particular have a basic shape different from a truncated cone, for example cylindrical, in at least a partial area along the central axes of the dispensing openings. In particular, the dispensing openings have a larger cross-sectional area on a side delimited by the receiving area than on a side delimited by the dispensing area.

In addition, it is proposed that the media output element have at least one, in particular the aforementioned, curvature in an unexcited state, the output openings being arranged in the region of the curvature. An advantageously direct and precise setting of the output parameters of the media output element, in particular a spray cone output via the media output element, can be made possible. In particular, the configuration of the curvature can advantageously have good properties of the output element be made possible with regard to an excitation parameter of the media output element, a type of medium to be output and / or a configuration of the media transmission element. The media output element preferably has the unexcited state in a deactivated state of the actuator element, in a state of the media output element separate from the actuator element and / or between two oscillation periods of the media output element during operation by means of the actuator element. A "curvature" is to be understood in particular as a shape of a body, in particular of the media output element, the body having a bulging deformation in at least one area on an outer wall of the body, which in at least one, in particular at least substantially perpendicular to the outer wall, Cross-sectional plane has a contour which is free of corners and edges between two ends of the contour. In particular, the curvature is arranged centrally on the media output element. The curvature, viewed along the central axis of the media output element, is preferably formed point-symmetrically to the central axis of the media output element. The curvature particularly preferably extends in the dispensing direction and / or in a direction directed from the receiving surface to the dispensing surface. The curvature preferably has a circular arc-shaped contour in at least one, in particular at least substantially perpendicular to the outer wall, cross-sectional plane. It is also conceivable for the curvature to be curved and / or arched differently in sections, the contour being formed, for example, by a plurality of circular arc-shaped sections. In addition, it is conceivable that the media output element forms a bevel and / or a shoulder in the area of the curvature, which / which extends in particular around the central axis of the media output element. The media output element preferably has at least one edge region which delimits the curvature and, in particular, at least substantially completely encloses it around the central axis of the media output element. The media output element is designed to be planar in the edge area. The media output element is provided to be applied to the actuator element via the edge region of the media output element. The actuator element is preferably designed in the shape of a circular ring and rests against the media output element in the edge region of the media output element via the output surface and / or the receiving surface. The dispensing openings are, in particular all arranged in the region of the arch, in particular the output openings, in particular in the unexcited state of the media output element, being at least partially frustoconical. A maximum height of the curvature, which in particular is aligned at least substantially parallel to the central axis of the media output element and / or at least substantially perpendicular to the main extension plane of the media output element, preferably corresponds to a value from a value range between 0.05 mm and 1 mm, preferably between 0, 25 mm and 0.8 mm and particularly preferably between 0.4 mm and 0.65 mm. The maximum height of the curvature from the output surface in the edge region of the media output element extends at least substantially parallel to the central axis of the media output element to an apex of the curvature which is arranged within the output surface and / or on the central axis of the media output element. The media output element formed with the curvature is preferably provided to vibrate when excited by the actuator element in such a way that a basic shape of the curvature is maintained during an oscillation. However, it is also conceivable that the curvature deforms in the event of an oscillation, in particular along the central axis of the media output element and / or the curvature.

It is also proposed that the curvature is designed in such a way that the curvature in an edge region of the curvature spans a maximum angle of at most 45 °, preferably at most 35 ° and preferably at most 30 °, with one, in particular the aforementioned, main plane of extent of the media output element. An advantageously small output angle of the medium can be made possible when it is output via the media output element. It can advantageously be possible to set a spray angle of the medium to be dispensed as a function of the configuration of the media dispensing element. The edge area of the arch preferably extends along an outer edge of the arch, via which in particular the arch is delimited from the flat edge area of the media output element. The curvature spans with the main plane of extent of the media output element preferably a maximum angle of at least 5 °, preferably at least 10 ° and preferably at least 15 °. The curvature in the edge region of the curvature is particularly preferably free of dispensing openings educated. The curvature is preferably formed at a minimal distance around the outer edge of the curvature free of dispensing openings and / or with at least substantially closed outer surfaces, the minimal distance being at least 5%, preferably at least 8% and preferably at least 10%, of a maximum transverse extent of the Curvature, which is aligned in particular at least substantially perpendicular to the central axis of the media output element and / or at least substantially parallel to the main plane of extent of the media output element. The maximum transverse extent of the curvature preferably corresponds to a value from a value range between 3 mm and 7 mm, preferably between 4 mm and 6 mm and preferably between 5 mm and 5.5 mm. Preferably, a ratio of the maximum height of the curvature, which is in particular aligned at least substantially parallel to the central axis of the media output element and / or at least substantially perpendicular to the main plane of extent of the media output element, to the maximum transverse extent of the curvature corresponds to a value from a value range between 0.007 and 3, preferably between 0.042 and 0.2 and preferably 0.073 and 0.13.

It is further proposed that the media output element have a parabolic contour in the region of the curvature, viewed in at least one section plane arranged at least substantially parallel to the central axis of the media output element. Deposits of the medium in an area around the central axis of the media output element can advantageously be prevented. It can advantageously be possible to set a spray angle of the medium to be dispensed as a function of the configuration of the media dispensing element. The cutting plane is preferably arranged in such a way that the cutting plane encompasses the central axis of the media output element. An apex of the parabolic contour is preferably arranged on the central axis of the media output element.

In addition, a method for a targeted output of a medium by means of a media output device according to the invention is proposed.

The embodiment of the method according to the invention enables an advantageously uniform and directed output of the medium by means of the media output element be made possible. An advantageously direct and precise control of output parameters, in particular a spray angle, a fluid quantity, a homogeneity or the like, of the media output element, in particular for spraying and / or printing, for example of resolution-optimized structures, in particular dots, can be achieved. An advantageously uniform application of a medium, in particular a paint, to a surface can be made possible by means of the media output element.

It is also proposed that the output by means of the media output device take place using a medium which, in particular under standard conditions, has a viscosity function that has a value between 2 mPas and 40 mPas, preferably between 4 mPas and 25 mPas. s and preferably between 5 mPas and 13 mPas. An advantageously resolution-optimized output of the medium, in particular embodied as a color, can be made possible. A configuration of the media output device that is optimized for color output can be achieved. Unwanted deposits of the medium on the media output element can advantageously be prevented. The media output device is particularly preferably provided for use with a medium designed as a non-Newtonian fluid.

It is also proposed that the output by means of the media output device take place using a medium which, at a temperature between 5 ° C and 50 ° C, in particular at room temperature, has a dynamic surface tension that has a value between 30 mN / m and 62 mN / m corresponds to. An advantageously resolution-optimized output of the medium, in particular embodied as a color, can be made possible. A configuration of the media output device that is optimized for color output can be achieved. Unwanted deposits of the medium on the media output element can advantageously be prevented.

In addition, a media application system with at least one media output device according to the invention is proposed. In particular, the media application system is designed as a paint application system. The media application system is preferred for a directed output of the medium, for example for printing and / or spraying the surface. In particular, the actuator element is provided to stimulate the media output element to print by means of the medium in a pulsed manner, with in particular no stimulation occurring at least temporarily between two stimulation phases of the media output element. In particular, the actuator element is provided to continuously stimulate the media output element to spray by means of the medium, wherein in particular an excitation of the media output element is stimulated at a fixed frequency while the medium is being dispensed. The media application system preferably comprises at least one media storage device for storing the medium. The media storage device is preferably designed as an exchangeable container, an exchangeable cartridge or the like. The media storage device is preferably provided to be connected to the media output device in particular for outputting the medium via the media output device. In particular, the media storage device comprises the media transfer element, which is provided to interact with the media output element in order to transfer the medium to the media output device, in particular to the media output element. In particular, the media transfer element is intended to be applied to the media output element, in particular the receiving surface, in particular in at least one operating state, for transferring the medium to the media output element. The media transfer element preferably has at least one transfer surface for contact with the media output element. It is conceivable that the transfer surface has a curvature in at least one partial area, which in particular is designed to correspond to the curvature of the media output element and / or at least partially has a curved basic shape.

The design of the media application system according to the invention enables an advantageously uniform and directed dispensing of the medium by means of the media dispensing element. An advantageously direct and precise control of output parameters, in particular a spray angle, a fluid quantity, a homogeneity or the like, of the media output element, in particular for spraying and / or printing, for example of resolution-optimized structures, in particular dots, can be achieved. It an advantageously uniform application of a medium, in particular a paint, to a surface can be made possible by means of the media output element.

In addition, a use of a media output device, in particular a media output device according to the invention, for applying a color is proposed. The paint preferably has a viscosity function, in particular under standard conditions, which has a value between 2 mPas and 40 mPas, preferably between 4 mPas and 25 mPas and preferably between 5 mPas and 13 mPas , is equivalent to. At a temperature between 5 ° C. and 50 ° C., in particular at room temperature, the paint preferably has a dynamic surface tension which corresponds to a value between 30 mN / m and 62 mN / m.

The inventive design of the use enables an advantageously uniform and directed output of the ink by means of the media output element. An advantageously direct and precise control of output parameters, in particular a spray angle, a fluid quantity, a homogeneity or the like, of the media output element, in particular for spraying and / or printing, for example of resolution-optimized structures, in particular dots, can be achieved. An advantageously uniform application of the paint to a surface can be made possible by means of the media output element.

The media output device according to the invention, the method according to the invention, the media application system according to the invention and / or the use according to the invention should / should not be restricted to the application and embodiment described above. In particular, the media output device according to the invention, the method according to the invention, the media application system according to the invention and / or the use according to the invention for fulfilling a mode of operation described herein can have a number that differs from a number of individual elements, components and units as well as method steps mentioned herein. In addition, in the case of the value ranges specified in this disclosure, values lying within the stated limits should also be deemed disclosed and can be used in any way.

drawings

Further advantages emerge from the following description of the drawings. Three exemplary embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

eine schematische Darstellung eines erfindungsgemäßen Medienauftragungssystems mit einer erfindungsgemäßen Medienausgabevorrichtung zu einem Auftragen einer Farbe,

Fig. 2

eine schematische Darstellung der erfindungsgemäßen Medienausgabevorrichtung,

Fig. 3

eine schematische Detailansicht eines Medienausgabeelements der erfindungsgemäßen Medienausgabevorrichtung,

Fig. 4

ein beispielhaftes Ausgabemuster einer Farbe durch das Medienausgabeelement der erfindungsgemäßen Medienausgabevorrichtung,

Fig. 5

eine schematische Darstellung einer beispielhaften Messung von Geschwindigkeiten einer Ausgabefläche des Medienausgabeelements der erfindungsgemäßen Medienausgabevorrichtung in Abhängigkeit von einem Abstand zu einer Mittelachse des Medienausgabeelements,

Fig. 6

eine schematische Darstellung von beispielhaften Messungen einer Admittanz und eines Phasenwinkels des Medienausgabeelements der erfindungsgemäßen Medienausgabevorrichtung bei drei verschiedenen Dämpfungsgraden des Medienausgabeelements,

Fig. 7

eine schematische Darstellung eines beispielhaften Ablaufs eines erfindungsgemäßen Verfahrens zu einer gezielten Ausgabe eines Mediums mittels der erfindungsgemäßen Medienausgabevorrichtung,

Fig. 8

eine schematische Detailansicht einer alternativen Ausgestaltung eines Medienausgabeelements einer erfindungsgemäßen Medienausgabevorrichtung und

Fig. 9

ein beispielhaftes Ausgabemuster einer Farbe durch eine weitere alternative Ausgestaltung eines Medienausgabeelements einer erfindungsgemäßen Medienausgabevorrichtung, mit einer Quincunx-Anordnung von Ausgabeöffnungen.

Show it:

Fig. 1

a schematic representation of a media application system according to the invention with a media output device according to the invention for applying a color,

Fig. 2

a schematic representation of the media output device according to the invention,

Fig. 3

a schematic detailed view of a media output element of the media output device according to the invention,

Fig. 4

an exemplary output pattern of a color by the media output element of the media output device according to the invention,

Fig. 5

a schematic representation of an exemplary measurement of speeds of an output surface of the media output element of the media output device according to the invention as a function of a distance from a central axis of the media output element,

Fig. 6

a schematic representation of exemplary measurements of an admittance and a phase angle of the media output element of the media output device according to the invention with three different degrees of attenuation of the media output element,

Fig. 7

a schematic representation of an exemplary sequence of a method according to the invention for a targeted output a medium by means of the media output device according to the invention,

Fig. 8

a schematic detailed view of an alternative embodiment of a media output element of a media output device according to the invention and

Fig. 9

an exemplary output pattern of a color through a further alternative embodiment of a media output element of a media output device according to the invention, with a quincunx arrangement of output openings.

Description of the exemplary embodiments

Figure 1 shows a media application system 10a, which is designed in particular as a paint application system, in a schematic representation. The media application system 10a comprises a media output device 12a for outputting at least one medium and a media storage device 14a. The media output device 12a is designed in particular as a spray or print head. The media application system 10a comprises a base unit 16a to which the media storage device 14a and the media output device 12a can be fastened. In Figure 1 the media output device 12a is shown in particular in a state arranged on the base unit 16a and the media storage device 14a is shown in a state separated from the base unit 16a and the media output device 12a. The media application system 10a preferably comprises at least one fixing unit 18a, in particular at least partially formed separately from the media storage device 14a and / or from the media output device 12a, which is provided to fix the media storage device 14a and / or the media output device 12a on the base unit 16a.

The base unit 16a preferably comprises at least one housing 20a on and / or in which a multiplicity of components of the media application system 10a are arranged. In particular, the housing 20a forms, at least in sections, a handle of the base unit 16a. The housing 20a preferably forms, at least in sections, a receiving area 22a of the Base unit 16a, to which the media storage device 14a and the media output device 12a can be attached. The base unit 16a preferably comprises at least one reference element 24a, in particular arranged on the housing 20a in the receiving region 22a. Preferably, at least one position and / or orientation of the media application system 10a relative to a surface 26a on which a media application takes place can be detected by means of the reference element 24a, in particular by an external unit 28a, such as a smartphone, a tablet, a camera, augmented reality glasses or the like. The reference element 24a is preferably designed as a luminous element, in particular as an LED-illuminated sphere of light. Alternatively, it is conceivable that the reference element 24a is designed as a radiation-free reference element, for example as a QR code, as a bar code or as another reference element that appears useful to a person skilled in the art.

The media storage device 14a comprises a media container 30a for storing the medium and a mechanical interface 32a for connection to the media output device 12a and / or the base unit 16a. The media storage device 14a comprises a media transfer unit 34a for transferring the medium from the media container 30a to the media output device 12a in at least one connected state of the interface 32a with the media output device 12a. The media transfer unit 34a comprises at least one porous media transfer element 36a, which is arranged on an output channel 38a of the media storage device 14a. In a connected state of the interface 32a, the media transfer element 36a is at least fluidly connected to an, in particular vibration-excited, media output element 40a of the media output device 12a, in particular arranged on the media output element 40a. The media storage device 14a is provided for receiving the at least one medium, in particular the at least one color medium. In particular, the media storage device 14a and / or the media output device 12a can be coupled, in particular operatively connected, to further components of the media application system 10a. The media storage device 14a is preferably designed as an exchangeable capsule. Alternatively, it is conceivable that the media storage device 14a can be used as an interchangeable cartridge, as an interchangeable tank, as an interchangeable cartridge or as another, a A person skilled in the art is designed as a media store that appears sensible, in particular for storing a color. In particular, the media storage device 14a can be releasably attached via the interface 32a to the base unit 16a of the media application system 10a, in particular to the housing 20a of the base unit 16a. In particular, the media storage device 14a can be attached to the base unit 16a, in particular to the housing 20a of the base unit 16a, in an exchangeable manner for a further media storage device 14a, which in particular contains a further medium.

The media output device 12a is preferably designed as an oscillation output unit. In particular, the media output device 12a is provided to output the medium received by the media storage device 14a by means of oscillations, in particular in an ultrasonic frequency range, in particular in an output direction 82a onto the surface 26a. Alternatively, it is conceivable that the media output device 12a is designed as a valve nozzle unit, as a pneumatic output unit or as another output unit that appears sensible to a person skilled in the art. In particular, the media output device 12a is provided to generate media points, in particular color points, on the surface 26a. Preferably, the media output device 12a, in particular for generating media dots on the surface 26a, is provided, in particular in at least one printing operating mode, to output the medium in droplets, in particular in the manner of a printer. The media output device 12a can preferably have at least one spray operating mode in which the media output device 12a is provided for continuous, in particular spraying, output of the medium. In particular, the media output device 12a can be releasably attached to the base unit 16a, in particular to the housing 20a of the base unit 16a. In particular, the media output device 12a can be attached to the base unit 16a, in particular to the housing 20a of the base unit 16a, interchangeably with a further media output device 12a, which in particular can have media output properties different from the media output device 12a. The media output element 40a is preferably designed as a membrane. The media output element 40a is provided to be excited to oscillate in a targeted output of the medium.

The medium is preferably designed as a liquid medium. In particular, the medium can be provided for a spray application and / or for a print application. The medium is preferably designed as a color medium, for example as a dye ink, as a pigment ink, as a spray paint, as a dispersion paint, as an acrylic paint, as an, in particular water-based, acrylic paint or the like. Alternatively, it is conceivable that the medium as a Spray chalk, a spray film or another medium that appears useful to a person skilled in the art. In particular, the media application system 10a, in particular the media output unit 12a, is intended to use a medium which has a viscosity function that has a value between 2 mPas and 40 mPas, preferably between 10 mPas and 35 mPas and preferably between 15 mPas and 30 mPas. The media application system 10a, in particular the media output unit 12a, is preferably provided for using a medium which, at a temperature between 5 ° C. and 50 ° C., has a dynamic surface tension that corresponds to a value between 30 mN / m and 62 mN / m.

The fixing unit 18a preferably comprises at least one fixing element 42a arranged on the base unit 16a and / or formed by the base unit 16a, which is provided to fix the media storage device 14a and / or the media output device 12a on the base unit 16a, in particular on the receiving area 22a . The fixing unit 18a is preferably provided to fix the media storage device 14a and the media output device 12a together, in particular in interaction with one another, on the base unit 16a. The media storage device 14a and / or the media output device 12a are / is preferably provided for positive and / or non-positive, interactive fixation, in particular by means of a latching connection, by means of a snap connection, by means of a clamp connection or the like, to one another and / or to the base unit 16a . Alternatively or additionally, it is conceivable that the media storage device 14a and / or the media output device 12a are / is provided for interactive fixation by means of a magnetic connection, by means of a suction connection, by means of a Velcro connection or the like, on one another and / or on the base unit 16a.

The media output device 12a and the media application system 10a are preferably provided for targeted and / or directed application of the medium, for example for printing and / or displaying complex objects and / or for spraying the medium onto a suitable surface.

In Figure 2 the media output device 12a is shown in a perspective view. The media output device 12a comprises the media output element 40a, two actuator elements 44a, 46a, in particular an actuator element 44a and a further actuator element 46a, to excite the media output element 40a and a control and / or regulating unit 48a to control the two actuator elements 44a, 46a, in particular to excite the media output element 40a. The control and / or regulating unit 48a is preferably provided to set at least one control parameter of the actuator elements 44a, 46a to excite the media output element 40a, in particular dynamically. In particular, the control parameter is designed as a functional parameter of a sinusoidal or sinusoidal electrical and / or electronic signal, in particular by means of which the two actuator elements 44a, 46a are controlled via the control and / or regulating unit 48a. The control and / or regulating unit 48a is preferably set up to output the sinusoidal or sinusoidal-like electrical and / or electronic signal for controlling the two actuator elements 44a, 46a, in particular to transmit it to the two actuator elements 44a, 46a. For example, the control and / or regulating unit 48a comprises at least one computing unit designed as a programmable FPGA or the like, which is not shown in the figures in particular. The control and / or regulating unit 48a is preferably set up to adapt the control parameter as a function of a control parameter of the media output element 40a and / or the actuator elements 44a, 46a, in particular dynamically. For example, the control parameter is designed as a phase shift of a vibration signal, as a frequency, as an electrical current, as an electrical voltage, as a determined admittance or the like of the media output element 40a and / or the actuator elements 44a, 46a. In particular, the control and / or regulating unit 48a is set up to use the control parameter of the media output element 40a and / or the actuator elements 44a, 46a. The control and / or regulating unit 48a preferably comprises a detection element 50a for detecting the control parameter of the media output element 40a and / or the actuator elements 44a, 46a. The detection element 50a is preferably arranged at least partially on a line element 52a of the control and / or regulating unit 48a. In particular, the line element 52a is provided for an at least electrical connection to the media output element 40a and / or the two actuator elements 44a, 46a. The line element 52a is particularly preferably provided to transmit the electrical and / or electronic signal, which in particular has the excitation parameter, to the actuator elements 44a, 46a for controlling the actuator elements 44a, 46a. At least one reference value of the control parameter and / or the control parameter, such as an admittance value, an electrical current, an electrical voltage or the like, is preferably stored in the control and / or regulating unit 48a. In particular, the control and / or regulating unit 48a is set up to set the control parameter as a function of the stored reference value, in particular as a function of a ratio and / or a difference between a detected value of the control parameter and / or the control parameter and the reference value, the control parameter, in particular dynamically, for example between two successive excitations of the actuator elements 44a, 46a.

The media output element 40a is at least partially elastic, in particular elastically deformable, in particular can be excited to vibrate. The media output element 40a preferably delimits a multiplicity of output openings 54a through which the medium in particular can be discharged. The output openings 54a are designed in particular as a perforation or hole in the media output element 40a. The media output element 40a is designed in particular as an ultrasonic membrane, as an ultrasonic plate or the like. The media output element 40a is preferably embodied in the shape of a circular area when viewed in a main plane 56a of the media output element 40a, which corresponds in particular to a membrane plane of the media output device 12a. Alternatively, it is conceivable that the media output element 40a is viewed in the main extension plane 56a of the media output element 40a Is elliptical, polygonal, for example square or triangular, or the like. Is formed. The media output element 40a is preferably provided to receive the medium from the media transfer element 36a and to output it in the direction of the surface 26a, in particular in a targeted and / or directed manner (see FIG Figure 1 ).

The two actuator elements 44a, 46a are preferably designed as piezo elements, in particular as piezo crystals. In particular, the actuator elements 44a, 46a designed as piezo elements change their shape as a result of the application of an electrical voltage to the actuator elements 44a, 46a designed as piezo elements, which results in oscillation in particular due to a mechanical coupling of the actuator elements 44a, 46a designed as piezo elements with the media output element 40a of the media output element 40a leads. Alternatively, it is conceivable that the actuator elements 44a, 46a are designed as MEMS actuators (micro-electromechanical system actuators), as ultrasonic converters or as other actuator elements 44a, 46a that appear sensible to a person skilled in the art. In particular, the actuator elements 44a, 46a are each designed in the shape of a circular ring and are arranged coaxially around a central axis 58a of the media output element 40a on the media output element 40a. The two actuator elements 44a, 46a are preferably at least electrically connected to the control and / or regulating unit 48a.

The two actuator elements 44a, 46a are provided to excite the media output element 40a with the sinusoidal or sinusoidal signal, the control parameter being designed as a functional parameter of the sinusoidal or sinusoidal signal. The functional parameter of the sinusoidal or sinusoidal signal is designed, for example, as a frequency, as a period, as an amplitude, as a phase shift, as a step width, in particular of the sinusoidal signal, or the like. The two actuator elements 44a, 46a have a circular base area, the maximum extent 60a of which is between 15 mm and 25 mm, in particular between 16 mm and 22 mm, preferably between 18 mm and 20 mm and particularly preferably at least substantially 20 mm. The actuator elements 44a, 46a preferably at least enclose an output region 62a of the media output element 40a, via which the medium is output a sectional plane, in particular a / the main extension plane 56a of the media output element 40a and / or one of the actuator elements 44a, 46a, viewed at least substantially completely. The two actuator elements 44a, 46a are preferably arranged such that the main extension planes of the actuator elements are arranged at least substantially perpendicular to the main extension plane 56a of the media output element 40a. The circular base area of the actuator elements 44a, 46a preferably has a maximum inner diameter 64a, in particular at least substantially perpendicular to the central axis 58a of the media output element 40a, which in particular has a value from a value range between 4 mm and 28 mm, preferably between 6 mm and 20 mm and preferably between 8 mm and 15 mm. The two actuator elements 44a, 46a are at least essentially structurally identical, in particular identical. The control and / or regulating unit 48a is preferably set up to control the actuator element 44a and the further actuator element 46a by means of precisely one electrical and / or electronic signal, in particular via the same control parameter. The actuator element 44a preferably rests on an output surface 66a of the media output element 40a, with the further actuator element 46a in particular on a receiving surface 68a (see FIG Figure 3 ) of the media output element 40a is applied. The actuator element 44a and the further actuator element 46a are particularly preferably arranged coaxially to one another, in particular around the central axis 58a of the media output element 40a. In an alternative embodiment, in particular to a spraying of the medium, the actuator elements 44a, 46a have a maximum extension 60a of at least essentially 16 mm.

The control and / or regulating unit 48a is set up to adapt the control parameter embodied as an excitation frequency to a setting of a size of the point to be output. Preferably, the control and / or regulating unit 48a is set up to increase the point to be output to regulate the control parameters of the actuator elements 44a, 46a designed as the excitation frequency to the resonance frequency, the excitation frequency in particular being adapted in this way by means of the control and / or regulating unit that a value of the excitation frequency corresponds at least substantially to the resonance frequency. It is also conceivable that the tax and / or the control unit 48a is set up to increase the point to be output to control the control parameter, embodied as an excitation frequency, of the actuator elements 44a, 46a to a value different from the resonance frequency. The control and / or regulating unit 48a is preferably set up to determine a resonance frequency of a system made up of the media output element 40a and the actuator elements 44a, 46a. For example, the control and / or regulating unit 48a is set up to determine the resonance frequency of the system as a function of a maximum of the admittance and / or a zero point of a phase angle between the media output element 40a and the actuator elements 44a, 46a, the phase angle in particular by means of the detection element 50a detected current and / or voltage values can be determined. The control and / or regulating unit 48a is preferably set up to calculate the admittance via the quotient of an electrical current and an electrical voltage, which can be detected in particular by means of the control and / or regulating unit 48a. The media output element 40a is preferably provided to adjust the size of the point to be outputted to a maximum output angle 70a of the medium, which spans an output cone 72a around the central axis 58a of the media output element 40a in the output direction, within which the medium is at least substantially completely output. The output region 62a is preferably arranged at least substantially completely within the output cone 72a. The control and / or regulating unit 48a is set up to control the two actuator elements 44a, 46a to output the point in such a way that the media output element 40a within an excitation time between 2 and 200, preferably between 10 and 150 and preferably between 30 and 100, Performs vibrations. In particular, the control and / or regulating unit 48a is set up to at least temporarily suspend an excitation of the media output element 40a by means of the actuator elements 44a, 46a between two successive excitation times, in particular for a movement of the media output device 12a and / or the media application system 10a by a user and / or the external unit 28a.

The dispensing openings 54a have a maximum dispensing opening diameter 74a, which has a value from a range of values from 10 µm to 60 µm, preferably from 15 µm to 40 µm, preferably from at least substantially 20 µm to 30 µm and particularly preferably from at least substantially 30 µm, wherein the control and / or regulating unit 28a is set up to adapt the control parameters in such a way that the Media output element 40a excited via actuator elements 44a, 46a at a maximum speed between 0.5 m / s and 7 m / s, preferably between 0.7 m / s and 5 m / s and preferably between 0.9 m / s and 3 m / s, oscillates. The dispensing openings 54a particularly preferably have a smaller cross-sectional area on the side facing the dispensing surface 66a than on the side of the dispensing openings 54a facing the receiving surface 68a. Preferably, the inner surfaces delimiting the dispensing openings 54a on the side of the dispensing openings 54a facing the receiving surface and the receiving surface 68a form an angle of at most 80 °, preferably at most 65 ° and preferably at most 50 °. The inner surfaces delimiting the dispensing openings 54a on the side of the dispensing openings 54a facing the dispensing surface 66a and the dispensing surface 66a preferably span an angle of at least 80 °, preferably at least 85 ° and preferably at least substantially 90 °. The maximum speed of the media output element 40a is preferably formed as a speed amplitude of at least one point within the media output element 40a, in particular on the central axis 58a of the media output element 40a, which, in particular when the media output element 40a is excited by means of the actuator elements 44a, 46a, at least essentially moves parallel to the central axis 58a of the media output element 40a, in particular oscillates. The output region 62a of the media output element 40a has a maximum extension 76a between 1 mm and 6 mm, in particular between 3 mm and 3.5 mm, preferably between 3.1 mm and 3.4 mm and preferably of at least substantially 3.3 mm, on, wherein the control and / or regulating unit 48a is set up to set the control parameter in the form of a current amplitude for setting a size of the point to be output to a value between 80 mA and 180 mA. The maximum extension 76a of the output region 62a is preferably aligned at least substantially parallel to the main extension axis (s) 56a of the media output element 40a and / or the actuator elements 44a, 46a. In particular, the dispensing area 62a is designed as an area which includes the dispensing openings 54a, in particular all of them output openings 54a defined by the media output element 40a. The dispensing region 62a preferably extends along the dispensing surface 66a. The output region 62a of the media output element 40a has a maximum extension 76a between 1 mm and 6 mm, in particular between 3 mm and 3.5 mm, preferably between 3.1 mm and 3.4 mm and preferably of at least substantially 3.3 mm, on, wherein the control and / or regulating unit 48a is set up to adapt the control parameter embodied as maximum power to a setting of a size of the point to be output, in particular dynamically.

The output openings 54a are arranged in an at least substantially concentric arrangement, in particular on at least one circular ring, around the central axis 58a of the media output element 40a. The at least essentially concentric arrangement is particularly preferably embodied differently from a matrix arrangement, in particular in rows and columns. Preferably, all of the output openings 54a delimited by the media output element 40a are arranged in the at least substantially concentric arrangement around the central axis 58a of the media output element 40a. It is conceivable that the output openings 54a, in particular all of the output openings 54a delimited by the media output element 40a, are arranged within an annular region around the central axis 58a of the media output element 40a. The media output element 40a is preferably provided to carry out radially concentric vibrations for the output of the medium, in particular with regard to the central axis 58a of the media output element 40a, the output openings 54a in particular vibrating with the media output element 40a. In particular, the output openings 54a, in particular all output openings 54a delimited by the media output element 40a, have a minimum distance 80a from the central axis of the media output element 40a of at most 4 mm, preferably at most 3 mm, preferably at most 2 mm and particularly preferably at most 1.7 mm ( please refer Figure 3 ). The central axis 58a of the media output element 40a is preferably aligned at least substantially perpendicular to the main extension plane 56a of the media output element 40a.

The media output element 40a is preferably provided to pick up the medium when it vibrates via contact with the media transfer element 36a of the media transfer unit 34a and to output it in an output direction 82a of the media output element 40a and / or in the output cone 72a during the oscillation. In particular, the output direction 82a and / or a central axis of the output cone 72a are / is oriented at least substantially parallel to the central axis 58a of the media output element 40a. In particular, the output direction 82a points from the media output element 40a to the surface 26a. The media output element 40a comprises the receiving surface 68a and the output surface 66a. The receiving surface 68a and the output surface 66a, viewed along the central axis 58a of the media output element 40a, are preferably arranged on two outer sides of the media output element 40a arranged one behind the other. In particular, the output surface 66a is arranged on a side of the media output element 40a pointing in the output direction 82a. The receiving surface 68a is preferably arranged on a side of the media output element 40a facing away from the output surface 66a. Main planes of extension of the receiving surface 68a and the output surface 66a are preferably formed and / or aligned at least substantially perpendicular to the central axis of the media output element 40a. The receiving surface 68a is preferably provided to interact with the media transfer element 36a to receive the medium when the media output element 40a vibrates, with the media output element 40a in particular resting at least partially on the media transfer element 36a via the receiving surface 68a. The media output element 40a preferably has a maximum transverse extent 84a, in particular at least substantially perpendicular to the central axis 58a of the media output element 40a, which in particular has a value from a value range between 10 mm and 30 mm, preferably between 13 mm and 26 mm and preferably between 16 mm and 22 mm.

The output openings 54a extend over a maximum thickness of the media output element 40a, in particular from the output surface 66a to the receiving surface 68a. The output openings 54a, in particular inner surfaces of the media output element 40a delimiting the output openings 54a, are each delimited by the output surface 66a and the receiving surface 68a. In particular, the dispensing openings 54a on a side of the dispensing openings 54a facing the dispensing area 66a each have a different cross-sectional area than on a side of the dispensing openings 54a facing the receiving area 68a. The dispensing openings 54a each preferably have at least one central axis, each of which is in particular aligned at least substantially perpendicular to the receiving surface 68a and / or the dispensing surface 66a. Preferably, the dispensing openings 54a, in particular with regard to the central axes of the dispensing openings, in the dispensing surface 66a and in the receiving surface 68a each have an, in particular the same, at least substantially concentric arrangement. The dispensing openings 54a have a minimum spacing 86a from one another which corresponds to ten to twenty times, in particular twelve to sixteen times, a maximum dispensing opening diameter 74a of the dispensing openings 54a (see FIG Figure 4 ), the media output element 40a being intended for use with the medium which, in particular under standard conditions, has a viscosity function that has a value between 2 mPas and 40 mPas, preferably between 4 mPas and 25 mPas and preferably between 5 mPas and 13 mPas. The dispensing openings 54a preferably each have an at least substantially round, in particular circular, cross-sectional area. In particular, the maximum discharge opening diameter 74a is formed as a diameter of a cross-sectional area of the output openings 54a. The minimum distance 86a between the output openings 54a preferably corresponds to a value from a value range between 100 μm and 1200 μm, preferably between 150 μm and 800 μm, preferably between 200 μm and 600 μm and particularly preferably between 260 μm and 480 μm. The dispensing openings 54a particularly preferably have a minimum distance 86a from one another which corresponds to ten to twenty times, in particular twelve to sixteen times, the maximum dispensing opening diameter 74a of the dispensing openings 54a.

In an alternative embodiment of the media output device 12a, the media output device 12a has only one actuator element 44a, 46a which is arranged and / or rests on the output surface 66a or the receiving surface 68a. Alternatively or additionally, it is conceivable that the media output element 40a has a greater or lesser maximum transverse extent 84a than the actuator element (s) 44a, 46a, for example of at least substantially 16 mm or of at least substantially 20 mm.

In Figure 3 A detailed side view of the media output element 40a is shown in an area around the central axis 58a of the media output element 40a. In an unexcited state, the media output element 40a has a curvature 88a, the output openings 54a being arranged in the region of the curvature 88a. The media output element 40a preferably has the unexcited state in a deactivated state of the actuator elements 44a, 46a, in a state of the media output element 40a separate from the actuator elements 44a, 46a and / or between two periods of oscillation of the media output element 40a during operation by means of the actuator elements 44a, 46a . In particular, the curvature 88a is arranged centrally on the media output element 40a. The curvature 88a, viewed along the central axis 58a of the media output element 40a, is preferably formed point-symmetrically to the central axis 58a of the media output element 40a. The curvature 88a particularly preferably extends in the dispensing direction 82a and / or in a direction directed from the receiving surface 68a to the dispensing surface 66a. The curvature 88a has a contour 90a in at least one, in particular at least substantially perpendicular to the main extension plane 56a of the media output element 40a and encompassing the central axis 58a of the media output element 40a, a contour 90a which is formed from three circular arc-shaped sections 92a, 94a. A first circular arc-shaped section 92a of the contour 90a comprises a point of the media output element 40a on the central axis 58a of the media output element 40a, in particular an apex 118a, and has a radius 96a which has a value from a value range of 3 mm to 8 mm, preferably 5 mm to 7 mm and particularly preferably of at least substantially 5.95 mm. A second and a third circular arc-shaped section 94a are identical to one another and delimit the first circular arc-shaped section 92a, viewed along the contour 90a, on both sides. The second and third circular arc-shaped section 94a each have a radius 98a which is smaller than the radius 96a of the first circular arc-shaped section 92a. Preferably, the radius 98a of the second and third circular arc-shaped section 94a corresponds to one Value from a value range from 1 mm to 5 mm, preferably 2 mm to 4 mm and preferably at least essentially 2.9 mm. The media output element 40a preferably has at least one edge region 100a which delimits the curvature 88a and, in particular, at least substantially completely surrounds it around the central axis 58a of the media output element 40a. The media output element 40a is designed to be planar in the edge region 100a. The media output element 40a is provided to be applied to the actuator elements 44a, 46a via the edge region 100a of the media output element 40a. The actuator elements 44a, 46a are preferably circular and in the edge region 100a of the media output element 40a lie against the media output element 40a via the output surface 66a and the receiving surface 68a (see FIG Figure 2 ). The output openings 54a are, in particular all, arranged in the region of the bulge 88a, wherein in particular the output openings 54a, in particular in the unexcited state of the media output element 40a, are at least partially frustoconical. Other configurations of the curvature 88a are also conceivable, for example with a continuously uniform circular arc-shaped contour 90a, which in particular has the radius 96a of the first circular arc-shaped section 92a and / or the radius 98a of the second and third circular arc-shaped section 94a, and / or a different arrangement or design of the sections 92a, 94a of the contour 90a.

The media output element 40a has an at least substantially closed surface 104a in a near region 102a of the central axis 58a, which is in particular free of output openings 54a and which is arranged in the region of the curvature 88a of the media output element 40a. The at least substantially closed surface 104a is free from dispensing openings 54a. In particular, the at least substantially closed surface 104a extends within, in particular centrally, the at least substantially concentric arrangement of the dispensing openings 54a. The at least substantially closed surface 104a preferably extends within a minimum distance 106a around the central axis 58a of the media output element 40a of at most 2 mm, preferably at most 1 mm, preferably at most 0.5 mm and particularly preferably at most 0.2 mm. The at least substantially closed surface 104a is preferably arranged in such a way that that the central axis 58a of the media output element 40a runs centrally through the at least substantially closed surface 104a. A roughness of the media output element 40a on the output surface 66a and / or on the receiving surface 68a is preferably at least essentially 0.2 mm.

The curvature 88a is designed such that the curvature 88a, in particular the second and / or the third circular arc-shaped section 94a of the contour 90a, in an edge region of the curvature 88a with the main extension plane 56a of the media output element 40a has a maximum angle 108a of at most 45 °, preferably at most 35 ° and preferably at most 30 °. The edge region of the bulge 88a preferably extends along an outer edge 110a of the bulge 88a, via which in particular the bulge 88a is delimited by the planar edge region 100a of the media output element 40a. The curvature 88a spans with the main extension plane 56a of the media output element 40a preferably a maximum angle 108a of at least 5 °, preferably at least 10 ° and preferably at least 15 °. The curvature 88a is particularly preferably embodied in the edge region of the curvature free of dispensing openings 54a. The bulge 88a is preferably formed at a minimal distance 112a around the outer edge 110a of the bulge 88a, free of dispensing openings 54a and / or with at least substantially closed outer surfaces, the minimal distance 112a at least 5%, preferably at least 8% and preferably at least 10 %, of a maximum transverse extension 114a of the curvature 88a, which is in particular aligned at least substantially perpendicular to the central axis 58a of the media output element 40a and / or at least substantially parallel to the main extension plane 56a of the media output element 40a. The maximum transverse extent 114a of the curvature 88a preferably corresponds to a value from a value range between 3 mm and 7 mm, preferably between 4 mm and 6 mm and preferably between 5 mm and 5.5 mm. The maximum transverse extent 114a particularly preferably corresponds to at least substantially 5.3 mm. The media transfer element 46a preferably has at least one transfer surface for contact with the media output element 40a (in Figure 3 Not shown). It is conceivable that the transfer surface has a curvature in at least one partial area, which in particular corresponds to the curvature 88a of the media output element 40a is formed, and / or at least partially has a curved basic shape.

A maximum height 116a of the curvature 88a, which in particular is aligned at least substantially parallel to the central axis 58a of the media output element 40a and / or at least substantially perpendicular to the main extension plane 56a of the media output element 40a, preferably corresponds to a value from a value range between 0.05 mm and 1 mm, preferably between 0.25 mm and 0.8 mm and particularly preferably between 0.4 mm and 0.65 mm. Particularly preferably, the maximum height 116a is, in particular in the Figure 3 curvature 88a shown, at least substantially 0.65 mm. Preferably, the maximum height 116a of the curvature 88a extends from the output surface 66a in the edge region 110a of the media output element 40a at least substantially parallel to the central axis 58a of the media output element 40a up to an apex 118a of the curvature 88a, which is within the output surface 66a and on the central axis 58a of the media output element 40a is arranged. In particular, the manufacturing tolerances of the abovementioned dimensional information, in particular the radius, the height, the transverse extent, etc., to the media output element 40a, in particular the curvature 88a, are at most 0.02 mm. In particular, configurations of the media output element 40a with a planar output surface 66a are also conceivable, the media output element 40a in particular not having any curvature 88a.

The output surface 66a at least partially delimits the output openings 54a, the output surface 66a being at least essentially liquid-repellent, the output surface 66a being at least partially arranged in the region of the curvature 88a of the media output element 40a. The output surface 66a is preferably designed to be hydrophobic with respect to the medium, a hydrophobic effect being observed in particular when the medium comes into contact with the output surface 66a. The dispensing surface 66a is at least substantially completely at least substantially liquid-repellent. Preferably, the dispensing surface 66a is at least substantially liquid-repellent at least within the dispensing area 62a. Alternatively or additionally, it is conceivable that the receiving surface 68a at least is formed substantially liquid-repellent. Alternatively or additionally, it is conceivable that the inner surfaces of the media output element 40a delimiting the output openings 54a are designed to be at least essentially liquid-repellent.

The discharge openings 54a are at least partially frustoconical. The inner surfaces of the media output element 40a delimiting the output openings 54a are at least partially oblique to the central axis 58a of the media output element 40a and / or the output openings 54a and to the main extension plane 56a of the media output element 40a. The dispensing openings 54a are each only partially frustoconical along the central axes of the dispensing openings 54a and have a basic shape different from a truncated cone, in particular cylindrical, in particular in at least a partial area along the central axes of the dispensing openings 54a. In particular, the dispensing openings 54a have a larger cross-sectional area on a side delimited by the receiving area 68a than on a side delimited by the dispensing area 66a. Alternatively, configurations of the media output element 40a without a bulge 88a are also conceivable, preferably for spraying the medium. In particular, the media output element 40a is designed to be at least essentially planar. In particular, the media output element 40a formed with a curvature 88a is preferably provided for spraying the medium.

In Figure 4 there is shown an output pattern 178a of a medium formed as a color by the media output element 40a of the media output device 12a. The output openings 54a are arranged in a plurality of concentric circles 120a around the central axis 58a of the media output element 40a and / or the output region 62a. The minimum distance 86a between the individual dispensing openings 54a is at least substantially 150 μm. A minimum distance 122a of the individual concentric circles 120a directed at least substantially perpendicular to the central axis 58a of the media output element 40a and to the central axis 58a is preferably between 150 μm and 200 μm. The output openings 54a, in particular all of the output openings 54a delimited by the media output element 40a, are arranged within an annular surface 124a on the media output element 40a (see also Figure 3 ). However, other configurations of the media output element 40a are also conceivable, for example with a minimum distance 86a of the output openings 54a other than 150 μm. In particular, the output pattern 178a is detected at a distance from the output surface 66a, whereby in particular the in Figure 4 The ratios and spacings shown do not exactly match an arrangement of the output openings 54a on the media output element 40a.

The control and / or regulating unit 48a is set up to use the control parameter to form the point at a position, in particular on the surface 26a, within less than 20 mm, preferably less than 15 mm and preferably less than 13 mm from the Adapt media output element 40a. The media output device 12a and / or the media application system 10a is preferably provided to be arranged at a minimum distance 126a of at most 20 mm, preferably at most 15 mm and preferably at most 13 mm, to the surface 26a for outputting the resolution-optimized point (see FIG Figure 1 ). The control and / or regulating unit 48a is particularly preferably set up to adapt the control parameters in such a way that the resolution-optimized point is formed on the surface 26a by the medium outputted, in particular paint, by means of the media output element 40a, in particular the minimum distance 126a of the media output element 40a to the surface 26a is at most 20 mm, preferably at most 15 mm and preferably at most 13 mm. However, configurations of the media output device 12a, in particular the control and / or regulating unit 48a, without a dependency of the control parameters of the actuator elements 44a, 46a on a minimum distance from the surface 26a, for example when the medium is sprayed, are also conceivable.

Figure 5 shows exemplary measurements 132a, 134a, 136a, 138a of a speed of the media output element 40a in a direction at least substantially parallel to the central axis 58a of the media output element 40a when excited by the actuator elements 44a, 46a as a function of a distance from the central axis 58a of the media output element 40a. An abscissa 128a gives the distance of a point of the media output element 40a from the central axis 58a of the media output element 40a in a plane of section through the central axis 58a, a zero point lying on the central axis 58a. An ordinate 130a indicates a speed of the respective point of the media output element 40a in the direction which is at least substantially parallel to the central axis 58a of the media output element 40a. A first measurement 132a shows the speed of the media output element 40a at a value of the excitation parameter embodied as the current amplitude of the electrical and / or electronic signal of 50 mA. A second measurement 134a shows the speed of the media output element 40a at a value of the excitation parameter embodied as the current amplitude of the electrical and / or electronic signal of 100 mA. A third measurement 136a shows the speed of the media output element 40a at a value of the excitation parameter embodied as the current amplitude of the electrical and / or electronic signal of 150 mA. A fourth measurement 138a shows the speed of the media output element 40a at a value of the excitation parameter embodied as the current amplitude of the electrical and / or electronic signal of 200 mA. In particular, regions of the media output element 40a that oscillate out of phase are also shown positively. The media output element 40a executes concentric vibrations, in particular similar to vibrations of a bending beam, about the central axis 58a of the media output element 40a.

In Figure 6 each shows three measurements of an admittance and a phase angle of a system of media output element 40a and actuator elements 44a, 46a for excitation of media output element 40a at three different degrees of attenuation. The abscissas 140a of the graphs shown each indicate a frequency, in particular the excitation frequency. Ordinates 142a of the graphs shown each indicate the admittance or the phase angle of the system. An upper graph shows measurements of the admittance in each case. A lower graph shows measurements of the phase angle in each case. A first measurement 144a of the admittance and the phase angle shows an undamped state of the system. A maximum 146a of the admittance and a zero crossing 148a of the phase angle of the first measurement 144a are arranged together at a value of the frequency which in particular corresponds to the resonance frequency of the system, which is 106.6 kHz, for example. A second Measurement 150a of the admittance and phase angle shows a damped state of the system. A maximum 152a of the admittance and a zero crossing 154a of the phase angle of the second measurement 150a are arranged shifted from one another at different values of the frequency, wherein in particular the zero crossing 154a of the phase angle can still be determined, preferably by means of the control and / or regulating unit 48a. The maximum 152a of the admittance of the second measurement 150a is arranged at a frequency of at least essentially 102 kHz, the zero crossing 154a of the phase angle of the second measurement 150a being arranged at at least essentially 104 kHz. A third measurement 156a of admittance and phase angle shows a heavily attenuated state of the system. A maximum 158a of the admittance and a zero crossing of the phase angle of the third measurement 156a are shifted further from one another than in the second measurement 150a, wherein in particular the zero crossing of the phase angle can no longer be determined, preferably by means of the control and / or regulating unit 48a. The control and / or regulating unit 48a is set up, in particular in at least one operating state and / or the heavily damped system, a resonance frequency of the media output element 40a as a function of a minimum 162a of a phase angle, in particular the third measurement 156a, of an oscillation of the media output element 40a to determine and to adapt the control parameters depending on the resonance frequency.

In Figure 7 an exemplary sequence of a method 164a for a targeted output of the medium by means of the media output device 12a and / or for an operation of the media output device 12a is shown. In a method step 166a of method 164a, actuator elements 44a, 46a are activated by means of control and / or regulating unit 48a to excite media output element 40a. The media output element 40a performs at least one oscillation, the medium being picked up by the media transfer unit 44a and being applied to the surface 26a in the output direction 82a, in particular in the form of a point. In a further method step 168a of method 164a, an electric current, an electric voltage and a phase angle of the actuator elements 44a, 46a and / or the media output element 40a are detected by means of the control and / or regulating unit 48a, in particular the detection element 50a. In a further process step 170a of the method 164a, at least one control parameter is used to control the media output element 40a of the media output device 12a via the actuator elements 44a, 46a of the media output device 12a by means of the control and / or regulating unit 48a of the media output device 12a with regard to the formation of the resolution-optimized point by means of the output medium, in particular dynamic, adapted. The control parameter is preferably adapted as a function of the detected values of the electrical current, the electrical voltage and / or the phase angle. The output by means of the media output device 12a takes place, in particular in method step 166a of the method 164a, using a medium which, in particular under standard conditions, has a viscosity function that has a value between 2 mPas and 40 mPas, preferably between 4 mPas · S and 25 mPa · s and preferably between 5 mPa · s and 13 mPa · s. The output by means of the media output device 12a takes place, in particular in method step 166a of method 164a, using a medium which, at a temperature between 5 ° C and 50 ° C, in particular at room temperature, has a dynamic surface tension that has a value between 30 mN / m and 62 mN / m.

In the Figures 8 and 9 further embodiments of the invention are shown. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, whereby with regard to identically designated components, in particular with regard to components with the same reference numerals, in principle also to the drawings and / or the description of the other exemplary embodiments, in particular the Figures 1 to 7 , can be referenced. To distinguish the exemplary embodiments, the letter a is the reference number of the exemplary embodiment in FIG Figures 1 to 7 re-enacted. In the embodiments of Figures 8 and 9 the letter a is replaced by the letters b and c.

In Figure 8 an alternative embodiment of a media output device 12b for a media application system 10b is shown. The media output device 12b comprises a media output element 40b, which is provided to be excited to vibrate for a targeted output of a medium. The media output element 40b is provided by means of at least one actuator element 44b, 46b to be stimulated (in Figure 8 not shown), which rests against the media output element 40b. The media output element 40b delimits a multiplicity of output openings 54b which are arranged in an at least substantially concentric arrangement, in particular on a circular ring, around a central axis 58b of the media output element 40b. The media output element 40b has in an unexcited state, which in the Figure 8 is shown, a curvature 88b, the output openings 54b, in particular all of the output openings 54b delimited by the media output element 40b, being arranged in the region of the curvature 88b. The media output device 12b comprises a control and / or regulating unit 48b (in Figure 8 not shown) for controlling the actuator element 44b, 46b. The control and / or regulating unit 48b is set up to adapt at least one control parameter of the actuator element 44b, 46b with regard to the formation of a resolution-optimized point by means of the output medium, in particular dynamically. The one in the Figure 8 The media output device 12b shown has an at least substantially analogous configuration to that in the description of FIG Figures 1 to 7 media output device 12a described, so that with respect to an embodiment of the in the Figure 8 media output device 12b shown at least essentially to the description of the Figures 1 to 7 can be referenced. In contrast to that in the description of the Figures 1 to 7 The media output device 12a described has the media output element 40b in FIG Figure 8 media output device 12b shown, preferably in the region of the curvature 88b in at least one sectional plane arranged at least substantially parallel to the central axis 58b of the media output element 40b, viewed a parabolic contour 90b. The cutting plane is preferably arranged in such a way that the cutting plane includes the central axis 58b of the media output element 40b. A vertex 118b of the parabolic contour 90b is preferably arranged on the central axis 58b of the media output element 40b. The parabolic contour 90b has, in particular straight, legs 172b that span a maximum angle 108b of at most 45 °, preferably at most 35 ° and preferably at most 30 °, in an edge region of the curvature 88b with a main extension plane 56b of the media output element 40b. Particularly preferably, the angle 108b between the parabolic contour 90b, in particular the legs 172b, in the edge region of the curvature 88b and the Main plane of extension 56b of media output element 40b is at least substantially 25.7 °. A maximum transverse extent 114b of the curvature 88b, in particular at least substantially perpendicular to the central axis 58b of the media output element 40b, is preferably at least substantially 5.28 mm. In particular, a maximum height 116b of the bulge 88b, from a flat edge region 100b of the media output element 40b to the apex 118b of the bulge 88b, is at least essentially 1 mm. The parabolic contour 90b preferably has, in particular at a distance from the legs 172b, a coupling section 174b which is arranged centrally on the central axis 58b of the media output element 40b. The coupling section 174b is preferably designed in the shape of a circular arc and has a radius 176b of at least substantially 2.45 mm. However, other configurations of the media output element 40b, in particular the parabolic contour 90b, are also conceivable. In particular, the manufacturing tolerances of the abovementioned dimensional information, in particular the radius, the height, the transverse extent, etc., to the media output element 40b, in particular the curvature 88b, are at most 0.02 mm.

In Figure 9 an output pattern 178c of a medium in the form of paint is shown, which was generated by means of a further alternative embodiment of a media output device 12c for a media application system 10c. In particular, the output pattern 178c is detected at a distance from the output surface, whereby in particular the in Figure 9 The ratios and spacings shown do not exactly match an arrangement of the output openings 54c on the media output element 40c. The media output device 12c includes a media output element 40c (in Figure 9 not shown), which is intended to be excited to oscillate for a targeted output of a medium. The media output element 40c is provided to be excited by means of an actuator element 44c, 46c (in Figure 9 not shown), which rests against the media output element 40c. The media output element 40c defines a plurality of output openings 54c. The that in the Figure 9 The media output device 12c generating the output pattern 178c shown has an embodiment that is at least substantially analogous to that in the description of FIG Figures 1 to 7 media output device 12a described, so that with regard to an embodiment of the Figure 9 described Media output device 12c at least essentially based on the description of FIG Figures 1 to 7 can be referenced. In contrast to that in the description of the Figures 1 to 7 media output device 12a described are the output elements of the Figure 9 described media output device 12c preferably arranged in a plurality of mutually arranged quincunx arrangements 180c around a central axis 58c of the media output element 40c. A minimum distance 86c between the individual output openings 54c is at least substantially 150 μm. However, other configurations of the media output element 40c are also conceivable, for example with a minimum distance 86c between the output openings 54c other than 150 μm. The output openings 54c, in particular all of the output openings 54c delimited by the media output element 40c, are arranged within an output surface 66c on the media output element 40c (in FIG Figure 9 Not shown).

Claims (13)

Media dispensing device, in particular a spray or print head, for a media application system (10a; 10b; 10c), with at least one media dispensing element (40a; 40b; 40c), in particular a membrane, which is provided for a targeted dispensing of a medium excited to vibrate are, the media output element (40a; 40b; 40c) delimiting a plurality of output openings (54a; 54b; 54c), characterized in that the output openings (54a; 54b; 54c) in an at least substantially concentric arrangement, in particular on at least one Circular ring, in at least one quincunx arrangement, hexagonal and / or square, are arranged around a central axis (58a; 58b; 58c) of the media output element (40a; 40b; 40c). Media output device according to claim 1, characterized in that the output openings (54a; 54b; 54c) have a minimum distance from one another which corresponds to ten to twenty times a maximum output opening diameter of the output openings (54a; 54b; 54c), wherein the media output element (40a; 40b ; 40c) is provided for use with the medium which has a viscosity function which corresponds to a value between 2 mPas and 40 mPas. Media output device according to Claim 1 or 2, characterized in that the media output element (40a; 40b) has an at least substantially closed surface (124a; 124b) in a vicinity of the central axis (58a; 58b), which in particular is free of output openings (54a; 54b) ) is formed and / or is arranged in particular in the region of a curvature (88a; 88b) of the media output element (40a; 40b). Media output device according to one of the preceding claims, characterized in that the media output element (40a; 40b; 40c) has at least one output surface (66a; 66b; 66c) which at least partially delimits the output openings (54a; 54b; 54c), the output surface (66a ; 66b; 66c) is designed to be at least essentially liquid-repellent, in particular the output surface (66a; 66b; 66c) being arranged at least partially in the region of a curvature (88a; 88b) of the media output element (40a; 40b; 40c). Media output device according to one of the preceding claims, characterized in that the output openings (54a; 54b; 54c) are at least partially frustoconical. Media output device according to one of the preceding claims, characterized in that the media output element (40a; 40b; 40c) in an unexcited state has at least one curvature (88a; 88b), the output openings (54a; 54b; 54c) in the region of the curvature (88a ; 88b) are arranged. Media output device according to Claim 6, characterized in that the curvature (88a; 88b) is designed in such a way that the curvature (88a; 88b) in an edge region of the curvature (88a; 88b) has a main plane (56a; 56b) of the media output element (40a ; 40b) spans a maximum angle (108a; 108b) of at most 45 °. Media output device according to Claim 6 or 7, characterized in that the media output element (40b) has a parabolic contour in the region of the curvature (88b), viewed in at least one section plane arranged at least substantially parallel to the central axis (58b) of the media output element (40b) (90b). Method for a targeted output of a medium by means of a media output device (10a; 10b; 10c) according to one of the preceding claims. Method according to Claim 9, characterized in that the output by means of the media output device (10a; 10b; 10c) takes place using a medium which has a viscosity function which corresponds to a value between 2 mPas and 40 mPas. Method according to Claim 9 or 10, characterized in that the output by means of the media output device (10a; 10b; 10c) takes place using a medium which has a dynamic surface tension at a temperature between 5 ° C and 50 ° C, in particular at room temperature which corresponds to a value between 30 mN / m and 62 mN / m. Media application system with at least one media output device (10a; 10b; 10c) according to one of Claims 1 to 8. Use of a media output device (12a; 12b; 12c), in particular a media output device (12a; 12b; 12c) according to one of Claims 1 to 8, for applying a color.

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