Application device and method for applying a fluid

Abstract

In order to provide an application device for applying application fluid to an object, said device being easy to assemble and able to be produced at low cost, and able to be operated in a wear-free, low-maintenance and low-installation manner, it is proposed that the application device (100) comprises one or more application units (102), wherein each application unit (102) comprises a plurality of closure units (142) for selectively opening or closing a plurality of fluid outlet channels (134); and at least one application fluid channel (130) for supplying application fluid to the closure units (142); and one or more valve units (126) for actuating the closure units (142).

Description

[0001] Application device and method for applying a fluid

[0002] The present invention relates to an application device and a method for applying a fluid to an object, in particular for applying cement paste to a sand bed.

[0003] The present invention is based on the object of providing an application device for applying application fluid that is easy to assemble and inexpensive to manufacture. Furthermore, the present invention is based on the object of providing an application device that is wear-free, low-maintenance, and easy to install.

[0004] This object is achieved according to the invention by an application device having the features of claim 1. Accordingly, the application device comprises one or more application units, each application unit comprising the following: a plurality of closure units for selectively opening or closing a plurality of fluid outlet channels; and at least one application fluid channel for supplying application fluid to the closure units; and one or more valve units for actuating the closure units.

[0005] In particular, the application fluid can be cement glue or wood glue or any fluidic process material.

[0006] The application device comprises, for example, at least one application unit. Preferably, the application device comprises at least two application units. In particular, the application device comprises a plurality of application units.

[0007] It may be advantageous if the application device comprises a plurality of application units. The plurality of application units preferably each comprise an application fluid channel.

[0008] It may be advantageous for an application unit to comprise multiple closure units, an application fluid channel, and multiple valve units. It may be advantageous for the application device to comprise multiple application units, each application unit comprising the same number of fluid outlet channels, closure units, and / or valve units. Furthermore, it may also be provided for an application device to comprise multiple application units, each application unit comprising a different number of fluid outlet channels, valve units, and / or closure units.

[0009] Each application unit can, for example, comprise at least one closure unit and at least one valve unit. It may be advantageous for the application unit to comprise at least two closure units and at least two valve units. Preferably, the application unit comprises a plurality of closure units and a plurality of valve units. In particular, the number of valve units and the number of closure units can be identical. It can also be provided that the number of valve units differs from the number of closure units in the application unit.

[0010] The application fluid channel may comprise a plurality of fluid outlet channels. A fluid outlet channel may, in particular, comprise an inlet opening and an outlet opening.

[0011] The fluid outlet channel can extend, for example, transversely to a main direction of extension. In particular, the main direction of extension extends parallel to an outer edge of the application unit. The fluid outlet channel can extend, for example, perpendicular to the main direction of extension. It can be advantageous if the fluid outlet channel is fluidically connected to the application fluid channel. Preferably, the fluid outlet channel is arranged directly below the application fluid channel. In particular, the fluid outlet channel extends at least approximately perpendicular to the main direction of extension, directly below the application fluid channel.

[0012] Preferably, a fluid outlet channel is a nozzle or opens into a nozzle. The nozzle can comprise or form the inlet opening at one end and the outlet opening at another end. The nozzle extends in particular from the inlet opening to the outlet opening. Preferably, the inlet opening is arranged in the application fluid channel or faces it. Preferably, the outlet opening is arranged on an application side of the application unit. In particular, the outlet opening faces away from the application fluid channel. In particular, the nozzle extends at least approximately perpendicular to the main extension direction between the application fluid channel and the application side of the application unit.

[0013] It can be advantageous if the nozzle is cylindrical.

[0014] It can be provided that the inlet opening and the outlet opening each have a circular cross-section. Alternatively, the outlet opening can have any other geometry. For example, the outlet opening can be rectangular, oval, or polygonal. It can be advantageous if the outlet opening and the inlet opening have different cross-sections. Alternatively, the outlet opening and the inlet opening can have an at least approximately identical cross-section.

[0015] Preferably, the outlet opening and the inlet opening form opposite ends of a fluid outlet channel. The outlet opening of the fluid outlet channel can be arranged on the application side of the application unit. It may be advantageous if the outlet opening is arranged directly below the inlet opening. The fluid outlet channel preferably extends between the inlet opening and the outlet opening. The fluid outlet channel preferably forms a fluidic connection between the application fluid channel and the application side of the application unit.

[0016] In one embodiment, it can be provided that the fluid outlet channel has a uniform cross-section between the outlet opening and the inlet opening. Alternatively, it can be provided that the fluid outlet channel does not have a uniform cross-section between the inlet opening and the outlet opening.

[0017] It may be advantageous if the fluid outlet channel is arranged obliquely to the main extension direction. In particular, the fluid outlet channel is arranged at least approximately perpendicular to the main extension direction.

[0018] The application unit preferably comprises a plurality of fluid outlet channels. In particular, the fluid outlet channels can be aligned at least approximately perpendicular to the main extension direction of the application unit and / or arranged linearly successively along the main extension direction. In one embodiment of the invention, it can be provided that the fluid outlet channels are arranged parallel to one another. The plurality of fluid outlet channels can, for example, form a fluid outlet channel row.

[0019] For example, several rows of fluid outlet channels can be assigned to an application fluid channel. The several rows of fluid outlet channels can, in particular, be arranged parallel to the main extension direction of the application unit. The fluid outlet channels of the several rows of fluid outlet channels extend between the application fluid channel and the application side of the application unit.

[0020] It may be advantageous if the fluid outlet channels of a first fluid outlet channel row and the fluid outlet channels of at least one further fluid outlet channel row are arranged offset from one another. The fluid outlet channels of a first fluid outlet channel row and the fluid outlet channels of at least one further fluid outlet channel row can be arranged alternately along the main extension direction of the application unit.

[0021] In particular, two rows of fluid outlet channels are assigned to one application fluid channel. The two rows of fluid outlet channels are preferably arranged parallel to the main extension direction of the application unit. It may be advantageous if the fluid outlet channels of the first row of fluid outlet channels and the fluid outlet channels of the second row of fluid outlet channels are arranged alternately one after the other, in particular in a zigzag pattern.

[0022] In one embodiment of the invention, it can be provided that the plurality of fluid outlet channels are arranged linearly one after the other parallel to the main extension direction of the application unit.

[0023] It may be advantageous if the fluid outlet channel row is arranged directly beneath the application fluid channel. In particular, the inlet openings and outlet openings of the fluid outlet channels can each be arranged linearly one after the other, parallel to the main extension direction of the application unit. The plurality of inlet openings and the plurality of outlet openings of the fluid outlet channels can, for example, form an outlet opening row and an inlet opening row. It may be advantageous if the inlet opening row is arranged parallel to the main extension direction of the application unit along the application fluid channel. Alternatively or additionally, the outlet opening row can be arranged parallel to the main extension direction of the application unit on the application side of the application unit.

[0024] Preferably, the row of inlet openings and the row of outlet openings are arranged directly below or above one another. Alternatively, the row of inlet openings and the row of outlet openings can be arranged offset from one another, below or above one another.

[0025] In one embodiment, it can be provided that the one closure unit can selectively open or close the one fluid outlet channel. Preferably, one closure unit is assigned to exactly one fluid outlet channel. In particular, a nozzle can be opened or closed by means of a closure unit. In particular, a nozzle can be opened or closed by means of a closure unit.

[0026] Furthermore, it can be provided that several fluid outlet channels can be opened or closed by means of a closure unit. In particular, it can be provided that the one closure unit extends over several fluid outlet channels. It can be advantageous if the closure unit opens or closes several fluid outlet channels simultaneously.

[0027] Preferably, each application unit comprises a base body. It may be advantageous if the base body comprises at least one application plate body, at least one center plate body, and at least one base plate body.

[0028] It can be advantageous if the base body is a cuboid. In particular, the cuboid has a square base. The cuboid extends along the main direction of extension of the application unit.

[0029] It may be advantageous if an upper side of the base body serves as a contacting side. A lower side of the base body is, in particular, the application side. In particular, the base body preferably has four side surfaces. In particular, the two side surfaces located on the short side of the rectangular base surface are end faces.

[0030] The base body can, in particular, be formed in one piece. However, it can be advantageous if the base body is formed in multiple parts. In particular, the base body can comprise at least two plate bodies. It can be advantageous if the base body comprises three plate bodies. Furthermore, it can be provided that the base body comprises a plurality of plate bodies.

[0031] It can be provided that one plate body is cuboid-shaped. Preferably, several plate bodies are cuboid-shaped. In particular, each plate body is cuboid-shaped.

[0032] Preferably, three or more than three plate bodies form the base body of the application unit.

[0033] The base plate body, the middle plate body, and the application plate body preferably each have a rectangular base surface. Each plate body has a top surface, a bottom surface, two short side surfaces, and two long side surfaces. The two short side surfaces are, in particular, two end faces of the respective plate body.

[0034] In one embodiment, it can be provided that a first plate body is, in particular, the application plate body. It can be advantageous if the application plate body extends along the main extension direction of the application unit. The application plate body can have a top side and a bottom side. In particular, the bottom side of the application plate body is the application side of the base body of the application unit.

[0035] Preferably, another plate body is the central plate body. The central plate body preferably extends along the main extension direction of the application unit.

[0036] The center plate body preferably has a top side and a bottom side. It may be advantageous if a base surface of the center plate body and a base surface of the application plate body are at least approximately identical. The bottom side of the center plate body is arranged, in particular, on the top side of the application plate body. In particular, the center plate body is arranged on the application plate body. The center plate body is preferably arranged between the application plate body and the base plate body.

[0037] It may be advantageous if another plate body serves as the base plate body. The base plate body preferably extends along the main extension direction of the application unit.

[0038] The base plate body can have a top side and a bottom side. It can be advantageous if the top side of the base plate body is or forms the contact side of the main body of the application unit. It can be advantageous if a base surface of the base plate body and a base surface of the middle plate body are at least approximately identical. The bottom side of the base plate body is arranged, in particular, on the top side of the middle plate body. In particular, the base plate body is arranged on the middle plate body.

[0039] In one embodiment, it can be provided that the base plate body, the middle plate body, and the application plate body each have different plate thicknesses. In particular, the application plate body has the smallest thickness of the three plate bodies. In particular, the base plate body has the greatest thickness of the three plate bodies. It can be provided that the middle plate body is at least approximately twice as thick as the application plate body. In particular, the base plate body can be at least approximately twice as thick as the middle plate body.

[0040] Preferably, the plate bodies form a plate body stack. The plate body stack forms, in particular, the base body of the application unit.

[0041] It can be provided that two end faces of the base plate body, two end faces of the middle plate body, and two end faces of the application plate body together form the two end faces of the main body of the application unit. It can be advantageous if one end face of the main body is arranged on at least one fastening element. Preferably, the second end face is arranged on a second fastening element. In particular, the application unit is arranged between the two fastening elements. In particular, the plate body stack is arranged between the two fastening elements.

[0042] In one embodiment, it can be provided that the plurality of application units are arranged between the two fixing elements. In particular, several plate body stacks can be arranged between the two fixing elements.

[0043] Optionally, two additional securing elements can be arranged on the at least one application unit. The two additional securing elements can preferably be arranged on the two long side surfaces of the base body. The securing elements can, in particular, form a frame around the application unit. In particular, the multiple application units can be surrounded by a frame-like arrangement of securing elements.

[0044] The multiple application units can, for example, be arranged parallel to one another. The multiple application units can, in particular, be arranged directly adjacent to one another. Alternatively, the multiple application units can be arranged at a distance from one another. It may be advantageous if the multiple application units are arranged parallel to one another. Preferably, the multiple application units are arranged at an oblique angle between the two securing elements. Preferably, the angle between the main extension direction of the application units and the at least one securing element is less than 90 degrees.

[0045] In particular, the row of fluid outlet channels is arranged at an oblique angle between the two fixing elements. The angle between the main extension direction of the application unit and the at least one fixing element is preferably less than 90 degrees, for example less than 30°, in particular less than 20°. In particular, the application unit is not arranged perpendicular to the at least one fixing element. It may be advantageous if the angle between the row of fluid outlet channels and the at least one fixing element is less than 90 degrees, for example less than 30°, in particular less than 20°. It may be advantageous if the plurality of rows of fluid outlet channels are arranged parallel to one another and obliquely to the at least one fixing element.

[0046] The plurality of fluid outlet channel rows are preferably arranged in a matrix-like manner in the application device, so that a minimum distance between the nozzles in each application unit and also between the plurality of application units can be ensured.

[0047] Preferably, at least one actuating fluid channel extends parallel to the main extension direction of the application unit in the application plate body and the center plate body. In particular, the actuating fluid channel is formed by the application plate body and the center plate body.

[0048] It may be advantageous if the actuating fluid channel extends parallel to the main extension direction of the application unit across the entire base body. Preferably, the actuating fluid channel extends from one end face of the base body to the opposite end face of the base body.

[0049] The actuating fluid channel can be cylindrical. The actuating fluid channel can, in particular, have a circular cross-section. Alternatively, the cross-section of the actuating fluid channel can be polygonal or have any conceivable geometric shape.

[0050] In one embodiment, it can be provided that the actuating fluid channel is formed by a recess in the center plate body and by a corresponding recess in the application plate body. The recesses can be round. The recesses can also be square. The cross-section of the recess in the center plate body can, in particular, be semicircular. In addition, the cross-section of the recess in the application plate body can also be semicircular. It can be advantageous if the respective cross-sections of the recesses in the center plate body and the application plate body together form the circular cross-section of the actuating fluid channel. Alternatively, the respective cross-sections of the recesses in the center plate body and the application plate body together can form any conceivable cross-section of the actuating fluid channel.It may be advantageous if the recesses in the application plate body and the center plate body extend parallel to the main extension direction of the application unit. In particular, the recess in the application plate body extends parallel to the main extension direction of the application unit. Preferably, the recess in the center plate body extends parallel to the main extension direction of the application unit.

[0051] It may be advantageous if the recesses of the center plate body and the application plate body extend across the entire base body parallel to the main direction of extension. Preferably, the recesses extend from one end face of the base body to the opposite end face of the base body. Alternatively, the recesses may not extend across the entire base body parallel to the main direction of extension.

[0052] Preferably, the actuating fluid channel is arranged between the valve unit and a bottom side of the application unit. The actuating fluid channel can be arranged between the valve unit and the application side of the base body. In particular, the actuating fluid channel can be arranged directly below the valve unit. Alternatively, the actuating fluid channel can be arranged next to the valve unit.

[0053] In one embodiment, the valve units can be arranged along the actuating fluid channel. In particular, the valve units are arranged below or next to the actuating fluid channel along the main extension direction of the application unit.

[0054] Preferably, the actuating fluid channel is a compressed air channel for supplying compressed air to the closure unit.

[0055] Furthermore, it may be advantageous if a further actuating fluid channel extends parallel to the main extension direction of the application unit in the at least one base plate body. For example, the further actuating fluid channel is a second of two actuating fluid channels. For example, the further actuating fluid channel extends parallel to the main extension direction of the application unit across the entire base body. In particular, the further actuating fluid channel extends from one end face of the base body to the opposite end face of the base body.

[0056] The additional actuating fluid channel can be cylindrical. The additional actuating fluid channel can, in particular, have a circular cross-section. The cross-section of the additional actuating fluid channel can have any geometric shape.

[0057] It may be advantageous if the additional actuating fluid channel extends parallel to the main direction of extension of the application unit. It may be advantageous if the actuating fluid channel extends across the entire base body parallel to the main direction of extension of the application unit. For example, the additional actuating fluid channel extends from one end face of the base body to the opposite end face of the base body. In particular, the additional actuating fluid channel can extend from one end face of the base plate body to the opposite end face of the base plate body. Alternatively, the additional actuating fluid channel can not extend across the entire base body parallel to the main direction of extension.

[0058] In particular, the additional actuating fluid channel can be a through-hole. The through-hole can extend in the base body parallel to the main extension direction of the application unit. The through-hole can extend in the base plate body, in particular, parallel to the main extension direction of the application unit.

[0059] For example, the additional actuating fluid channel can be designed as an insert. In particular, the insert can be a cylindrical hollow body.

[0060] It may be advantageous if the additional actuating fluid channel is arranged between the application fluid channel and a top side of the application unit. Preferably, the additional actuating fluid channel can be arranged between the application fluid channel and the contact side of the base body. For example, the actuating fluid channel can be arranged directly above the application fluid channel. In particular, the additional actuating fluid channel extends directly above the application fluid channel parallel to the main extension direction of the application unit.

[0061] Alternatively, the additional actuating fluid channel can be arranged above or next to the actuating fluid channel. The actuating fluid channel is preferably arranged directly above the application side in the base body. The additional actuating fluid channel can, in particular, be arranged directly below the contact side in the base body. For example, the actuating fluid channel and the additional actuating fluid channel are arranged on two opposite sides in the base body.

[0062] Preferably, the actuating fluid channel is a vacuum channel for discharging the compressed air from the closure unit.

[0063] It may be advantageous if the application unit comprises at least one actuating fluid channel. Preferably, the application unit comprises at least two actuating fluid channels.

[0064] The at least one actuating fluid channel can be assigned to at least one valve unit. In one embodiment, it can be provided that the at least one actuating fluid channel is assigned to several valve units of the application unit for supplying actuating fluid. It can be advantageous if the additional actuating fluid channel is assigned to several valve units of the application unit for discharging actuating fluid. In particular, the compressed air channel can be assigned to several valve units of the application unit. In addition, the vacuum channel can be assigned to several valve units of the application unit.

[0065] The actuating fluid can in particular be a gas or a liquid.

[0066] In one embodiment, it can be provided that the application unit does not comprise a further actuating fluid channel. Preferably, the further actuating fluid channel can be replaced by several ventilation channels. For example, each valve unit can comprise a ventilation channel. The ventilation channels can be arranged obliquely to the main extension direction of the base body. In particular, the ventilation channels extend at least approximately perpendicular to the main extension direction of the application unit. The ventilation channels extend in particular from the valve unit to the contact side of the application unit.

[0067] The application fluid channel can extend within the center plate body and the base plate body. Preferably, the application fluid channel is formed by the center plate body and the base plate body.

[0068] It can be advantageous if the application fluid channel extends parallel to the main direction of extension of the application unit across the entire base body. For example, the application fluid channel extends from one end face of the base body to the opposite end face of the base body.

[0069] The application fluid channel can be cylindrical. The application fluid channel can preferably have a circular cross-section. The cross-section of the application fluid channel can have any conceivable geometric shape.

[0070] The application fluid channel is formed, for example, by a recess in the center plate body and by a corresponding recess in the base plate body. The recesses can be round. The recesses can be square. The cross-section of the recess in the center plate body can, in particular, differ from the cross-section of the recess in the base plate body. Alternatively, the cross-sections of the recesses in the base plate body and the center plate body can be identical. The cross-sections of the recesses in the center plate body and the base plate body together form the cross-section of the application fluid channel.

[0071] Preferably, the respective recesses in the center plate body and the base plate body extend parallel to the main extension direction of the application unit. For example, the recesses in the center plate body and the base plate body extend over the entire base body parallel to the main extension direction. The recesses extend, in particular, from one end face of the base body to the opposite end face of the base body. In one embodiment, it can be provided that the respective recesses are arranged in the center plate body and in the base plate body such that, in the assembled state, they face each other and form the application fluid channel.

[0072] It may be advantageous if the at least one or more valve units extend transversely to the main extension direction of the application unit. Preferably, the at least one or more valve units extend transversely to the main extension direction of the application unit in the center plate body and the base plate body. In particular, the at least one or more valve units extend at least approximately perpendicular to the main extension direction of the application unit. For example, the at least one or more valve units extend at least approximately perpendicular to a plane in which the plate bodies are arranged adjacent to one another.

[0073] In one embodiment, it can be provided that the valve unit extends at least approximately perpendicular to the main extension direction over the entire base plate body. In addition, the valve unit can extend at least approximately perpendicular to the main extension direction in the center plate body. In particular, the valve unit extends at least approximately over half of the center plate body perpendicular to the main extension direction.

[0074] It may be advantageous if the at least one valve unit comprises a valve for actuating the closure unit. The valve unit can be fluidically connected to the at least one actuating fluid channel. The valve unit can, in particular, be fluidically connected to the compressed air channel. The valve unit enables actuating fluid to be supplied to the at least one closure unit. The compressed air can be forwarded from the compressed air channel to the at least one closure unit by means of the valve unit.

[0075] In one embodiment, it can be provided that the at least one closure unit comprises at least one closure element and at least one guide element.

[0076] The closure element is preferably sleeve-shaped. The at least one closure element can be a rubber sleeve, which is preferably deformable. The rubber sleeve can, in particular, comprise a bellows. The rubber sleeve can, in particular, be a flexible sleeve.

[0077] Furthermore, it can be provided that the application fluid can be supplied to at least one outlet opening through an interior space of the closure unit, in particular the closure element. The respective outlet opening can be formed by the closure unit and / or the base body of the application unit.

[0078] The interior of the at least one closure element can be shaped as a cylinder having a diameter of approximately 0.5 mm to approximately 1 mm. Preferably, the cylinder has a diameter of approximately 0.7 mm to approximately 0.9 mm.

[0079] Alternatively, the cylinder may have a diameter of greater than approximately 1 mm to approximately 4 mm. Preferably, the cylinder has a diameter of approximately 2 mm to approximately 3 mm.

[0080] The cylinder may preferably have a circular base. Alternatively, the cylinder may have an oval base, e.g., in the shape of an ellipse.

[0081] The base area and the diameter can preferably refer to an initial state, i.e. an undeformed state, of the at least one closure element.

[0082] Additionally or alternatively, the at least one closure element may have one or more predetermined deformation sections.

[0083] The one or more desired deformation sections can preferably be cross-sectional sections in which the at least one closure element is thinner within a respective sectional plane than in the remaining cross-sectional sections within the respective sectional plane. An elliptical hollow cross-section, for example, can fulfill such conditions.

[0084] Preferably, the at least one closure element can have two predetermined deformation sections that are diametrically opposed to a central axis of the closure element. In one embodiment, it can be provided that the closure element has varying material thicknesses, for example, to enable a preferred direction during deformation of the closure element and / or a predetermined deformation geometry. Preferably, the closure element comprises at least one stabilizing region and at least one folding region. It can be advantageous if the closure element comprises two folding regions and two stabilizing regions. The two stabilizing regions can in particular be pressed together. In the two folding regions, the closure element can preferably be folded and / or folded in on itself.It may be advantageous if the pressing of the two stabilizing areas together and the folding of the two folding areas enables the fluid outlet channel to be closed.

[0085] The material thickness of the closure element can, for example, be greater in the at least one stabilization region than the material thickness in the at least one fold region. In particular, it can be advantageous if the closure element has an at least approximately circular outer diameter and an at least approximately elliptical inner diameter. Alternatively, the closure element can have an at least approximately elliptical outer diameter and an at least approximately circular inner diameter.

[0086] For example, the at least one closure element is made of an elastomer. The elastomer can comprise, for example, natural rubber, EPDM, PUR, neoprene, NBR (Nitrile Butadiene Rubber), and / or silicone.

[0087] The at least one guide element can surround the closure element. The guide element can, in particular, be a support sleeve. The support sleeve can, for example, be designed in a mesh-like manner. It can be advantageous if the support sleeve has one or more holes, in particular for the entry and exit of actuating fluid into a pressure chamber that circumferentially surrounds the at least one guide element and / or the at least one closure element.

[0088] Alternatively or additionally, the guide element can comprise and / or be formed from two half-shells. In particular, the two half-shells can be arranged as a right-hand and a left-hand half-shell on the closure element and / or surround the closure element. It can be advantageous for the two half-shells to have one or more holes, particularly for the entry and exit of actuating fluid into the pressure chamber.

[0089] The guide element may be provided with greater rigidity than the closure element. In particular, the guide element is inherently rigid during normal operation of the application device.

[0090] It may be advantageous if the closure element is fixed or fixable in a cavity of the base body of the application unit by means of the guide element. For example, the guide element can be arranged, in particular clamped, between opposite ends of the closure element, in particular to fix the opposite ends of the closure element locally in the cavity of the base body of the application unit. In particular, a distance between the opposite ends of the closure element can be kept at least approximately constant by means of the guide element during deformation of the closure element in a central region or closure region thereof.

[0091] It may be advantageous if a sealing bead, in particular an annular sealing bead, is formed at each of the opposite ends of the closure element. The guide element can be arranged, in particular clamped, between the two sealing beads. In particular, the guide element serves to fix and position the sealing beads in the cavity and / or to press the sealing beads against the walls of the cavity, so that the actuating fluid cannot escape from the cavity of the base body of the application unit when the closure element is deformed. For example, the guide element can be referred to as a positioning element.

[0092] It can be advantageous if the guide element counteracts an expansion of the closure element and / or prevents an uncontrolled expansion of the closure element.

[0093] It may be advantageous if the at least one or more closure units extend transversely to the main extension direction of the application unit in the center plate body and the application plate body. The at least one or more closure units preferably extend at least approximately perpendicular to the main extension direction of the application unit.

[0094] The one or more closure units can be arranged directly below the application fluid channel in the base body.

[0095] In one embodiment, the closure unit can be arranged between the inlet opening and the outlet opening of the fluid outlet channel. Preferably, the plurality of closure units are arranged between the respective outlet opening and inlet opening of the fluid outlet channel.

[0096] The base body of the application unit preferably comprises at least one cavity. The cavity can, for example, be arranged directly below the application fluid channel. The at least one closure unit can be arranged in the at least one cavity.

[0097] It can be advantageous if a pressure chamber extends in the cavity between the closure unit and the base body.

[0098] The cavity can be arranged transversely to the main direction of extension of the application unit. In particular, the cavity is arranged at least approximately perpendicular to the main direction of extension of the application unit.

[0099] The cavity is preferably cylindrical. The cavity can also be spherical or cuboid-shaped. It can be advantageous if the cavity is formed by the application plate body and the middle plate body. The cavity is preferably formed by a recess in the middle plate body and by a corresponding recess in the application plate body. The recesses can in particular be round. Alternatively, the recesses can be square. The respective recesses in the application plate body and the middle plate body can be arranged in the application plate body and in the middle plate body such that, when the middle plate body and the application plate body are assembled, they lie opposite one another and thus form the cavity. The base body of the application unit can preferably comprise a plurality of cavities.It may be advantageous if each fluid outlet channel is assigned a cavity. Alternatively, a cavity may comprise several fluid outlet channels. The cavities may be arranged linearly in succession parallel to the main extension direction of the application unit, thereby forming a row of cavities.

[0100] In one embodiment, the closure element can be received in the cavity in a force-fitting manner. Alternatively, the closure element can be received in the cavity in a form-fitting manner.

[0101] It may be advantageous if the at least one fluid outlet channel in the cavity extends transversely to the main extension direction of the application unit. In particular, a cylindrical interior of the closure element can extend perpendicular to the main extension direction of the application unit. Preferably, the interior of the closure element forms part of the fluid outlet channel. In particular, the interior of the closure element forms the fluid outlet channel.

[0102] It may be advantageous if the plurality of closure units are connected to a common actuating fluid channel by means of a plurality of connecting channels, wherein a fluid connection between the actuating fluid channel and the respective closure unit can preferably be established or interrupted by means of the valve unit assigned to a respective closure unit.

[0103] Preferably, the connecting channel can be arranged between the closure unit and the valve unit. For example, the connecting channel connects the cavity to the valve unit. The connecting channel ensures rapid supply of actuating fluid to the closure unit. In particular, the connecting channel guides the compressed air into the cavity.

[0104] In one embodiment, the connecting channel can extend transversely to the main extension direction of the application unit. Preferably, the connecting channel extends transversely to the main extension direction of the application unit in the center plate body. It can be advantageous if the connecting channel is arranged at an angle of less than 90 degrees to the main extension direction of the application unit. In particular, the connecting channel and the fluid outlet channel form an angle of at least approximately 45 degrees.

[0105] It can be advantageous if the at least one closure element is elastic and deformable depending on pressure. The closure element can be surrounded by actuating fluid when the application unit is in use. For example, the closure element can be deformed by increasing and decreasing pressure of the actuating fluid in the cavity of the base body. Preferably, the closure element can selectively open or close the associated fluid outlet channel by varying the applied pressure of the actuating fluid in the cavity of the base body. It can be advantageous if the closure element closes the associated fluid outlet channel when excess pressure is present. Alternatively, it can be provided that the closure element opens the associated fluid outlet channel when the pressure is reduced. In particular, a rapid and controlled opening of the fluid outlet channel can be promoted by an additional vacuum.

[0106] For example, a cross-sectional area of ​​the outlet opening can be reversibly enlarged or reduced by deforming the closure element. Accordingly, the cross-sectional area of ​​the outlet opening can be smallest when the actuating fluid is pressurized in the cavity of the base body. The cross-sectional area can be at least approximately zero. The fluid outlet channel is, in particular, open, and the application fluid can leave the application unit. The cross-sectional area of ​​the outlet opening can be enlarged upon pressure reduction, in particular under a vacuum. The fluid outlet channel is, in particular, closed, and the application fluid cannot leave the application unit.

[0107] Furthermore, it may be advantageous if the multiple valve units are arranged linearly one after the other parallel to the main extension direction of the application unit, thereby forming a row of valve units. It may also be advantageous if the multiple closure units are arranged linearly one after the other parallel to the main extension direction of the application unit, thereby forming a row of closure units. Preferably, the row of valve units and the row of closure units are arranged parallel to one another. It may be advantageous if the closure units comprise or are pinch valves.

[0108] Additionally or alternatively, the valve units may comprise or be angle seat valves.

[0109] Additionally or alternatively, the valve units may include or be pilot valves.

[0110] In one embodiment, it can be provided that the valve units comprise or are electrovalves.

[0111] The electrovalves may preferably comprise or be solenoid valves.

[0112] Additionally or alternatively, the electrovalves may include or be piezo valves.

[0113] Additionally or alternatively, the solenoid valves may comprise or be servo-controlled or electromechanically controlled valves.

[0114] Preferably, the application unit can comprise an application fluid circuit or form a component thereof, so that a permanent flow of the application fluid can be maintained in the application fluid channel. In particular, the application fluid channel is continuously flowed through by application fluid in a use state.

[0115] Preferably, the application fluid channel has an at least approximately constant cross-section, whereby, during use, little or no turbulence of the application fluid occurs in the application fluid channel. In particular, the permanent flow of the application fluid is approximately a permanent laminar flow.

[0116] Alternatively, a permanent turbulent flow can be provided in the application fluid channel. This can particularly help prevent sediment formation in the application fluid channel.

[0117] It can be advantageous that, due to the permanent flow through the application fluid channel, application fluid is always present at the inlet openings of the fluid outlet channels. In particular, the application fluid can be continuously released from each fluid outlet channel of the application unit.

[0118] The present invention further relates to a method for applying a fluid by means of an application device.

[0119] The present invention is based on the object of providing an application device for applying application fluid that is easy and quick to assemble and inexpensive to manufacture. Furthermore, the present invention is based on the object of providing an application device that is wear-free, low-maintenance, and easy to install.

[0120] This object is achieved according to the invention by the features of claim 15.

[0121] The method according to the invention preferably has one or more of the features and / or advantages described in connection with the application device according to the invention.

[0122] It may be advantageous if the application fluid is applied in droplets. The application fluid emerges, in particular, from at least one fluid outlet channel and is applied by gravity to an object located directly below.

[0123] The object can be, for example, a sand bed.

[0124] It may be advantageous if several closure units selectively open or close the multiple fluid outlet channels. Preferably, one or more valve units actuate the multiple closure units. In particular, the fluid outlet channels are opened or closed by actuating the closure units.

[0125] The locking units are preferably operated pneumatically or hydraulically.

[0126] It may be advantageous if an actuating fluid flows continuously through at least one actuating fluid channel. The actuating fluid can, in particular, be a gas or a liquid. A permanent overpressure is preferably present in the at least one actuating fluid channel. For example, a permanent gas overpressure prevails in the actuating fluid channel. The actuating fluid channel can, in particular, be a compressed air channel. Alternatively, a permanent liquid overpressure can prevail in the actuating fluid channel.

[0127] Preferably, the overpressure of the actuating fluid is permanently applied to the at least one valve unit. It may be advantageous if the same overpressure of the actuating fluid is applied to each valve unit. In particular, the overpressure prevailing in the actuating fluid channel corresponds to the overpressure applied to the multiple valve units of the application unit.

[0128] In one embodiment, it can be provided that the valve unit comprises a valve, preferably an electric valve, which is controlled or actuated by means of electrical control pulses. The electrical control pulses preferably trigger the movement of a piston, which can in particular assume a release position. In the release position, for example, the actuating fluid can be supplied to the closure unit. The actuating fluid can therefore flow into a cavity in the base body in which the at least one closure unit is arranged. The at least one valve unit can therefore actuate or control the closure unit indirectly, i.e. by establishing or interrupting the fluid connection with the actuating channel and / or the further actuating channel.

[0129] Additionally or alternatively, it can be provided that the at least one valve unit can directly actuate or control the closure unit assigned to it. The direct actuation or control can, for example, take the form of a direct mechanical actuation or control.

[0130] The at least one valve unit can be electrically controlled, for example, with a minimum opening frequency of at least approximately 1 Hz, preferably approximately 5 Hz, more preferably approximately 10 Hz (Hertz). Additionally or alternatively, the at least one valve unit can be electrically controlled, for example, with a maximum opening frequency of approximately 100 Hz, preferably approximately 50 Hz, more preferably approximately 30 Hz (Hertz).

[0131] The opening frequency can advantageously be understood as indicating the number of electrical control pulses per second, i.e. how often the at least one valve unit changes from a closed position to an open position and vice versa per second.

[0132] A respective electrical control pulse can, for example, have a minimum pulse length of at least approximately 5 ms, preferably approximately 10 ms, more preferably approximately 20 ms (milliseconds). Additionally or alternatively, a respective electrical control pulse can, for example, have a maximum pulse length of approximately 100 ms, preferably approximately 50 ms, more preferably approximately 40 ms (milliseconds). The pulse length can preferably be constant.

[0133] In the release position, the actuating fluid preferably flows through the valve into an adjacent connecting channel. The connecting channel can, in particular, fluidically connect the valve unit to the closure unit. It may be advantageous if the connecting channel connects the valve unit to the cavity of the base body.

[0134] In one embodiment, several valves can be actuated simultaneously or alternately by means of a short electrical pulse. For example, each valve can be actuated individually and independently of the other valves. Each piston of each valve can assume a release position independently of the other valves. Preferably, each valve is actuated individually.

[0135] It may be advantageous if, in the release position, the overpressure of the actuating fluid applied to the closure units corresponds to the overpressure in the actuating fluid channel. Preferably, pressure equalization occurs between the actuating fluid channel and the cavity of the base body. As a result, overpressure can be generated in the cavity of the base body. For example, the inflowing actuating fluid can create overpressure in the respective cavities of the base body. In particular, overpressure only exists in the respective cavities when the associated valve is in the release position.

[0136] The overpressure preferably causes a deformation of an elastic closure element. For example, a cross-sectional area of ​​the fluid outlet channel is reduced and / or increased by deformation of the closure element.

[0137] In particular, the fluid outlet channel is formed by an interior space of the closure element. The application fluid preferably flows through the interior space of the closure element. The interior space of the closure element can be cylindrical. In particular, the interior space of the closure element is a circular cylinder.

[0138] For example, the diameter of the closure element is reduced by the surrounding overpressure of the actuating fluid in such a way that the flow of the application fluid inside the closure element can be prevented. For example, the multiple fluid outlet channels can be closed individually or together. The fluid outlet channel can remain closed as long as sufficient overpressure is present in the cavity to deform the closure element.

[0139] Alternatively, the overpressure of the actuating fluid in the cavity of the base body can be reduced to reopen the fluid outlet channel. By reducing the overpressure, the deformed closure element can, for example, at least approximately assume its original shape. Preferably, the original diameter of the closure element can be at least approximately restored.

[0140] Preferably, the valve unit is actuated again by means of a short electrical pulse. It can be advantageous if each valve unit can be actuated individually. The electrical pulse can trigger a renewed movement of the piston. The piston of the valve unit can, for example, assume a return position. In the return position, the piston can fluidically connect the connecting channel with another actuating fluid channel.

[0141] The further actuating fluid channel may preferably be a vacuum channel.

[0142] It may be advantageous if the additional actuating fluid channel can reduce the overpressure in the cavity of the base body. To reduce the overpressure, the vacuum channel can preferably be fluidically connected to the cavity via the valve unit. It may be advantageous if the fluid outlet channel again has a uniform cross-section due to the pressure reduction in the cavity. The fluid outlet channel can in particular be open. For example, the plurality of fluid outlet channels can be opened individually or jointly. As explained above, a fluid connection between the actuating fluid channel and the respective closure unit can preferably be established or interrupted by means of the one or more valve units (which are assigned to a respective closure unit or units).

[0143] According to this indirect type of control or actuation of the closure unit, the plurality of valve units are preferably designed as pilot valves.

[0144] A respective pilot valve can therefore be understood as being configured as a pilot valve unit, so that in an open position, it establishes a fluid connection between the actuating fluid channel and the closure unit. The pressurized fluid, preferably compressed air, can thus actuate, preferably close, the closure element of the closure unit. The open position can, in particular, refer to an open position with respect to the actuating fluid channel.

[0145] Accordingly, in a closed position, the pilot valve can interrupt a fluid connection between the actuating fluid channel and the closure unit. The closed position can, in particular, refer to a closed position with respect to the actuating fluid channel.

[0146] Furthermore, by means of the one or more valve units (which are assigned to a respective closure unit or units), a fluid connection between the further actuating fluid channel and the respective closure unit can preferably be established or interrupted.

[0147] In the open position (relative to the actuating fluid channel), the respective pilot valve can interrupt a fluid connection between the further actuating fluid channel and the closure unit.

[0148] Accordingly, in the closed position (relative to the actuating fluid channel), the pilot valve can establish a fluid connection between the additional actuating fluid channel and the closure unit. As explained above, the additional actuating fluid channel can have a negative pressure and can preferably be configured as a vacuum channel. The pressurized fluid, preferably compressed air, can thus be directed from the closure unit into the additional actuating channel by means of the valve unit. This allows the closure unit to be vented and thus actuated, preferably opened.

[0149] The function of the at least one valve unit, which is preferably designed as a pilot valve, can therefore be understood in such a way that it actuates or controls the closure unit indirectly, ie by means of the respective establishment or interruption of the fluid connection with the actuating channel and / or the further actuating channel.

[0150] Additionally or alternatively, it may be provided that the at least one valve unit can directly actuate the closure unit assigned to it. In this case, the devices that ensure the fluid supply, such as the actuating fluid channel, the additional actuating fluid channel, and the connecting channels, can be omitted.

[0151] In the case of direct actuation, the one or more valve units may each comprise or be solenoid valves and / or piezo valves.

[0152] Direct actuation can preferably be performed on one side of the closure element. Alternatively, direct actuation can be performed on multiple sides, preferably on both sides, and symmetrically on the closure element.

[0153] An actuation direction can in particular be aligned perpendicular to a central axis of the closure element.

[0154] In addition, the electromagnetic valves and / or piezo valves may comprise at least one mechanical actuating element for directly actuating the closure element.

[0155] The mechanical actuating element can, for example, be shaped as an actuating ring or as an actuating half-shell.

[0156] Preferably, the guide element can have one or more through-openings through which the mechanical actuating element arranged therein in the assembled state can be actuated by the respective valve unit, e.g., by means of an actuating rod. In the case of one-sided actuation, the guide element can have an inner support surface.

[0157] The mechanical actuating element can press the closure element against the inner support surface and thus, due to its elastic properties, controllably open and close the fluid outlet channel.

[0158] In the compressed state, a cross-section of the closure element can have an oval cross-section, at least in the area of ​​action of the mechanical actuating element.

[0159] In the case of multi-sided, preferably two-sided, actuation, the closure element can be actuated axially symmetrically and transversely to its central axis by means of two mechanical actuating elements, preferably two actuating half-shells.

[0160] If two mechanical actuating elements are provided, they can be actuated by a common valve unit. Alternatively, each of the mechanical actuating elements can be assigned a valve unit for its operation.

[0161] The two mechanical actuating elements can advantageously take over the function of the guide element when not actuated or opened, so that this can be omitted.

[0162] Alternatively, the guide element can be provided in addition to the two mechanical actuating elements and accordingly have two through-openings for the passage of the two mechanical actuating elements.

[0163] Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

[0164] In the figures: Fig. 1 shows a schematic perspective view of the application device, wherein the application device comprises several application units and several fixing elements;

[0165] Fig. 2 is a schematic perspective view of the application unit of an application device, wherein a base body comprises a base plate body, a middle plate body and an application plate body;

[0166] Fig. 3 is a schematic perspective view of the application unit of an application device, wherein the application unit is shown in particular on the application side;

[0167] Fig. 4 is a schematic perspective view of the application unit of an application device from Fig. 2, with a base plate body removed;

[0168] Fig. 5 is a schematic longitudinal section through the application unit of Fig. 2, showing the plurality of fluid outlet channels and closure units;

[0169] Fig. 6 is a schematic longitudinal section through the application unit of Fig. 2, showing the one actuating fluid channel and the plurality of valve units;

[0170] Fig. 7 shows a schematic cross section through the application unit, wherein the application fluid channel, the valve unit, the two actuating fluid channels, the connecting channel, the supply channels and the closure unit are arranged in the base body.

[0171] Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

[0172] An embodiment of an application device, designated as a whole by 100, shown in Figs. 1 to 7 serves, for example, to apply application fluid to an object, in particular to apply cement paste to a sand bed. The application device 100 comprises a plurality of application units 102. Each application unit 102 comprises a base body 104. The base body 104 is a cuboid that extends along a main extension direction 105 of the application unit 102. The base body 104 has two end faces 106. The two end faces 106 of the base body 104 are each arranged on a fixing element 108. In Fig.

[0173] 1 and 2 only one of the two end faces 106 is shown.

[0174] The application unit 102 is arranged between the two fixing elements 108. The plurality of application units 102 are arranged between the two fixing elements 108.

[0175] The multiple application units 102 are arranged parallel to one another. The multiple application units 102 are arranged at a distance from one another. The multiple application units 102 are arranged parallel to the main extension direction 105 of the application unit 102. The multiple application units 102 are arranged at an oblique angle α between the two fixing elements 108. The angle α between the main extension direction 105 of the application unit 102 and the fixing element 108 is less than 90 degrees.

[0176] The base body 104 is constructed in several parts. An application unit 102 shown in Fig. 2 comprises a base plate body 110, a center plate body 112, and an application plate body 114. The three plate bodies 110; 112; 114 together form the base body 104 of the application unit 102.

[0177] The base plate body 110, the middle plate body 112, and the application plate body 114 each have a rectangular base. Each plate body 110; 112; 114 has two short side surfaces. The two short side surfaces of each plate body are the two end faces 106a; 106b of the respective plate body 110; 112; 114.

[0178] An upper side of the base body 104 is a contacting side 116. A lower side of the base body 104 is an application side 118. The application side 118 of the base body 104 is shown in Fig. 3.

[0179] The application plate body 114 extends along the main extension direction 105 of the application unit 102. The application plate body 114 has a top side and a bottom side. The bottom side of the application plate body 114 is the application side 118 of the base body 104 of the application unit 102.

[0180] The center plate body 112 extends along the main extension direction 105 of the application unit 102. The center plate body 112 has a top side and a bottom side. The center plate body 112 is arranged on the application plate body 114. The center plate body 112 is arranged between the application plate body 114 and the base plate body 110.

[0181] The base plate body 110 extends along the main extension direction 105 of the application unit 102. The base plate body 110 has a top side and a bottom side. The top side of the base plate body 110 is the contact side 116 of the main body 104 of the application unit 102. The base area of ​​the base plate body 110, the base area of ​​the middle plate body 112, and the base area of ​​the application plate body 114 are identical.

[0182] The base plate body 110, the middle plate body 112, and the application plate body 114 each have different plate thicknesses. The application plate body 114 has the thinnest of the three plate bodies 110; 112; 114. The base plate body 110 has the thickest of the three plate bodies 110; 112; 114. The middle plate body 112 is approximately twice as thick as the application plate body 114. The base plate body 110 is approximately twice as thick as the middle plate body 112.

[0183] The plate bodies 110; 112; 114 form a plate body stack 120. The plate body stack 120 forms the base body 104 of the application unit 102. The two end faces 106a; 106b of the base plate body 110, the two end faces 106a; 106b of the middle plate body 112, and the two end faces 106a; 106b of the application plate body 114 form the two end faces 106 of the base body 104 of the application unit 102.

[0184] The actuating fluid channel 122 extends parallel to the main extension direction 105 of the application unit 102 in the application plate body 114 and the center plate body 112. The actuating fluid channel 122 is formed by the application plate body 114 and the center plate body 112. The actuating fluid channel 122 shown in Figures 2 to 7 extends parallel to the main extension direction 105 of the application unit 102 across the entire base body 104. The actuating fluid channel 122 extends from one end face 106 of the base body 104 to the opposite end face 106 of the base body 104.

[0185] The actuating fluid channel 122 is cylindrical. The actuating fluid channel 122 has a circular cross-sectional area. The actuating fluid channel 122 is formed by a recess 124 in the center plate body 112 and by a corresponding recess 124 in the application plate body 114. The recesses 124 are shown in particular in Fig. 6. The recesses 124 are round. The cross-sectional area of ​​the recesses 124 in the center plate body 112 and the application plate body 114 is semicircular and extends parallel to the main extension direction 105 of the application unit 102 across the entire plate body. The cross-sectional areas of the recesses 124 in the center plate body 112 and the application plate body 114 together form the circular cross-sectional area of ​​the actuating fluid channel 122.

[0186] The actuating fluid channel 122 is arranged between a valve unit 126 and the application side 118 of the base body 104. As can be seen in Figs. 4, 6, and 7, the actuating fluid channel 122 is arranged directly below the valve unit 126.

[0187] As shown in Fig. 2, the base body 104 of the application unit 102 has a nozzle-side region and a valve-side region. The nozzle-side region and the valve-side region divide the base body 104 of the application unit 102 into two equally sized regions, which extend parallel to the main extension direction 105 of the application unit 102.

[0188] A further actuating fluid channel 128 extends parallel to the main extension direction 105 of the application unit 102 in the base plate body 110. The further actuating fluid channel 128 is a second of two actuating fluid channels 122; 128.

[0189] The further actuating fluid channel 128 extends parallel to the main extension direction 105 of the application unit 102 over the entire base body 104. The further actuating fluid channel 128 extends from one end face 106 of the base body 104 to the opposite end face 106 of the base body 104. The further actuating fluid channel 128 extends from one end face 106a of the base plate body 110 to the opposite end face 106a of the base plate body 110.

[0190] The additional actuating fluid channel 128 is also cylindrical. The additional actuating fluid channel 128 has a circular cross-sectional area.

[0191] The further actuating fluid channel 128 is a through-bore extending in the base body 104 parallel to the main extension direction 105 of the application unit 102. The through-bore extends in the base plate body 110 parallel to the main extension direction 105 of the application unit 102.

[0192] The additional actuating fluid channel 128 is arranged between an application fluid channel 130 and the contacting side 116 of the base body 104. The additional actuating fluid channel 128 is arranged in the nozzle-side region. The actuating fluid channel 122 is arranged in the valve-side region.

[0193] The actuating fluid channel 122 is assigned to the multiple valve units 126 of the application unit 102 for supplying actuating fluid. The further actuating fluid channel 128 is assigned to the multiple valve units 126 of the application unit 102 for discharging actuating fluid.

[0194] The actuating fluid channels 122; 128 are fluidically connected to the plurality of valve units 126 via supply channels 129. The supply channels 129 are cylindrical. The supply channels 129 extend transversely to the main extension direction 105 of the application unit 102. The supply channel 129 of the actuating fluid channel 122 is arranged perpendicular to the main extension direction 105 of the application unit 102.

[0195] The supply channel 129 of the actuating fluid channel 122 has a larger cross-sectional area than the supply channel 129 to the further actuating fluid channel 128. The diameter of the supply channel 129 of the actuating fluid channel 122 is at least twice as large as the diameter of the supply channel 129 of the further actuating fluid channel 128.

[0196] The application fluid channel 130 extends into the center plate body 112 and the base plate body 110. The application fluid channel 130 is formed by the center plate body 112 and the base plate body 110. The application fluid channel 130 extends parallel to the main extension direction 105 of the application unit 102 across the entire base body 104. The application fluid channel 130 extends from one end face 106 of the base body 104 to the opposite end face 106 of the base body 104.

[0197] The application fluid channel 130 is cylindrical. The application fluid channel 130 has a circular cross-sectional area. The application fluid channel 130 is formed by a recess 132 in the center plate body 112 and by a corresponding recess 132 in the base plate body 110. The recesses 132 are shown in particular in Fig. 5. The recess 132 in the base plate body 110 is round. The cross-sectional area of ​​the recess 132 in the base plate body 110 is semicircular. The recess 132 in the center plate body 112 is square. The cross-sectional area of ​​the recess 132 in the center plate body 112 is trapezoidal. The cross-sectional areas of the recesses 132 in the center plate body 112 and the base plate body 110 together form the cross-sectional area of ​​the application fluid channel 130.

[0198] The recesses 132 extend in the center plate body 112 and the base plate body 110 parallel to the main extension direction 105 of the application unit 102. The recesses 132 extend over the entire base body 104 parallel to the main extension direction 105 of the application unit 102. The recesses 132 extend from one end face 106 of the base body 104 to the opposite end face 106 of the base body 104.

[0199] If the base body 104 of the application unit 102 is formed in one piece, the one or more application fluid channels 130, the one or more actuation fluid channels 122; 128 and the one or more recesses 148 of the cavity 140 can be inserts made of metal and / or plastic.

[0200] The application unit 102 comprises a plurality of valve units 126. The plurality of valve units 126 are arranged linearly one after the other parallel to the main extension direction 105 of the application unit 102. The plurality of valve units 126 form a valve unit row. The plurality of valve units 126 extend transversely to the main extension direction 105 of the application unit 102. The plurality of valve units 126 extend perpendicularly to the main extension direction 105 of the application unit 102 in the center plate body 112 and the base plate body 110.

[0201] The valve unit 126 extends perpendicular to the main extension direction 105 of the application unit 102 over the entire base plate body 110. An upper end of the valve unit 126 protrudes from the contact side 116 perpendicular to the main extension direction 105 of the application unit 102. The valve unit 126 extends perpendicular to the main extension direction 105 of the application unit 102 over half of the center plate body 112.

[0202] Figures 6 and 7 show that the plurality of valve units 126 are fluidly connected to the actuating fluid channel 122. The plurality of valve units 126 are fluidly connected to the further actuating fluid channel 128.

[0203] The valve units 126 are valves. A valve unit 126 is at least one valve. The valve units are shown in Figs. 2 and 4 in the valve-side area of ​​the base body.

[0204] 104. The valve unit row extends in the valve-side region of the base body 104 along the main extension direction 105 of the application unit 102. The valve unit row is shown in particular in Figs. 2, 4, and 6.

[0205] Fig. 4 shows the recess 132 of the application fluid channel 130 in the center plate body 112. The application fluid channel 130 comprises a plurality of fluid outlet channels 134. One fluid outlet channel 134 comprises an inlet opening 136 and an outlet opening 138. The fluid outlet channel 134 is fluidically connected to the application fluid channel 130. The fluid outlet channel 134 extends perpendicular to the main extension direction.

[0206] 105 of the application unit 102 directly below the application fluid channel.

[0207] The fluid outlet channel 134 is a nozzle. The nozzle comprises the inlet opening 136 at one end and the outlet opening 138 at another end. The nozzle extends from the inlet opening 136 to the outlet opening 138. As shown in Fig. 4, the inlet opening 136 is arranged in the application fluid channel 130. As shown in Fig. 3, the outlet opening 138 is arranged on the application side 118 of the application unit 102. The nozzle extends perpendicular to the main extension direction 105 of the application unit 102 between the application fluid channel 130 and the application side 118 of the application unit 102.

[0208] The plurality of fluid outlet channels 134 are arranged linearly one after the other, parallel to the main extension direction 105 of the application unit 102. The plurality of fluid outlet channels 134 form a fluid outlet channel row. The fluid outlet channel row is arranged directly below the application fluid channel 130. The inlet openings 136 and the outlet openings 138 of the fluid outlet channels 134 are arranged linearly one after the other, parallel to the main extension direction 105 of the application unit 102. The plurality of inlet openings 136 and the plurality of outlet openings 138 of the fluid outlet channels 134 each form an outlet opening row and an inlet opening row.

[0209] As shown in Fig. 7, the application unit 102 comprises a cavity 140. The cavity 140 is located directly below the application fluid channel. The cavity 140 is cylindrical. The cylindrical cavity 140 is arranged perpendicular to the main extension direction 105 of the application unit 102.

[0210] The cavity 140 is formed by the application plate body 114 and the center plate body 112. The cavity 140 is formed by a recess 148 in the center plate body 112 and by a recess 148 in the application plate body 114. The recesses 148 form the spherical cavity 140.

[0211] As shown in Fig. 5, the application unit 102 comprises a plurality of cavities 140. A closure unit 142 is arranged in each of the cavities.

[0212] The closure unit 142 comprises a closure element 144 and a guide element 146.

[0213] The closure element 144 is sleeve-like. The guide element 146 surrounds the closure element 144. The closure element 144 is received in the cavity 140 in a force-fitting and form-fitting manner. The closure element 144 can be a rubber sleeve that is reversibly deformable. The rubber sleeve can, in particular, comprise a bellows. The rubber sleeve can, in particular, be a flexible sleeve. The plurality of closure units 142 extend perpendicular to the main extension direction 105 of the application unit 102 in the center plate body 112 and the application plate body 114. The plurality of closure units 142 are arranged directly below the application fluid channel 130.

[0214] The plurality of closure units 142 are each arranged between the inlet opening 136 and the outlet opening 138 of the fluid outlet channel 134.

[0215] As can be seen in Fig. 7, a pressure chamber 150 extends in the cavity 140 between the closure unit 142 and the base body 104. The pressure chamber 150 is formed by the closure element 144 and the base body 104, by the center plate body 112, and the application plate body 114. The guide element 146 is arranged in the pressure chamber 150. The guide element 146 is arranged between the closure element 144 and the base body 104 in the pressure chamber 150. The application fluid can be fed through an interior of the closure element 144 to the outlet opening 138. The interior of the closure element 144 forms part of the fluid outlet channel 134. The interior of the closure element 144 forms the fluid outlet channel 134, in particular the nozzle.

[0216] It is further provided that the application fluid is guided through the interior to the respective outlet opening 138.

[0217] The respective outlet opening 138 (in Fig. 7 an outlet opening is shown in section as an example) is formed by means of the application plate body 114.

[0218] The interior of the respective closure element 144 is shaped as a cylinder whose length is greater than its diameter. The cylinder can have a diameter of approximately 0.5 mm to approximately 1 mm. Preferably, the cylinder has a diameter of approximately 0.7 mm to approximately 0.9 mm.

[0219] Alternatively, the cylinder may have a diameter of at least approximately 1 mm to approximately 4 mm. Preferably, the cylinder has a diameter of approximately 2 mm to approximately 3 mm. The cylinder may preferably have a circular base. Alternatively, the base may have an oval base, e.g., in the shape of an ellipse.

[0220] From Fig. 7 it can be seen that a wall thickness of the closure element 144, starting from its center, continuously increases axially along its center axis to its two ends.

[0221] However, the wall thickness may additionally vary along the central axis within an imaginary two-dimensional Cartesian coordinate system that is oriented perpendicular to the central axis and that represents the cross-section of the closure element.

[0222] Accordingly, the cross section of the respective closure element 144 has two desired deformation sections, which can be regarded as two sections within the Cartesian coordinate system that have a greater wall thickness than the other sections of the cross section.

[0223] Such a cross-section can be achieved, for example, by means of a circular inner diameter and an elliptical outer shape of the closure element 144. Alternatively, it may be advantageous if the closure element 144 has a circular outer diameter and an elliptical inner shape.

[0224] This makes it possible to provide a preferred direction of deformation of the closure element and / or a correspondingly predetermined deformation geometry.

[0225] For example, the closure element 144 is formed from an elastomer. The elastomer can include, for example, natural rubber, EPDM, PUR, neoprene, NBR (Nitrile Butadiene Rubber), and / or silicone.

[0226] The plurality of closure units 144 are connected to the valve units 126 by means of a plurality of connecting channels 152. The connecting channel 152 is shown in particular in Fig. 7. The plurality of connecting channels 152 are arranged between the closure unit 142 and the valve unit 126. The plurality of connecting channels 152 connect the nozzle-side region to the valve-side region. The connecting channel 152 connects the cavity 140 to the valve unit 126. The connecting channel 152 extends transversely to the main extension direction 105 of the application unit 102 in the center plate body 112. The connecting channel 152 is arranged at an angle β of less than 90 degrees to the main extension direction 105 of the application unit 102. The connecting channel 152 and the fluid outlet channel 134 form an angle β of approximately 45 degrees.The plurality of connecting channels 152 extend obliquely to the main extension direction 105 of the application unit 102 and are arranged parallel and linearly one after the other.

[0227] List of reference symbols

[0228] 100 application device

[0229] 102 Application unit

[0230] 104 basic bodies

[0231] 105 Main direction of extension

[0232] 106 Front side of the base body 106a Front side of the plate body 106b Further front side of the plate body

[0233] 108 Determination element

[0234] 110 base plate body

[0235] 112 center plate body

[0236] 114 Application plate body

[0237] 116 Contact page

[0238] 118 Application page

[0239] 120 plate body stacks

[0240] 122 Actuating fluid channel; compressed air channel

[0241] 124 Recess of the actuating fluid channel

[0242] 126 Valve unit

[0243] 128 additional actuating fluid channel; vacuum channel

[0244] 129 supply channel

[0245] 130 Application fluid channel

[0246] 132 Recess of the application fluid channel

[0247] 134 Fluid outlet channel

[0248] 136 Inlet opening

[0249] 138 Outlet opening

[0250] 140 cavity

[0251] 142 locking unit

[0252] 144 locking element

[0253] 146 guide element

[0254] 148 Recess of the cavity

[0255] 150 printing room

[0256] 152 Connection channel a Angle between an application unit and a fixing element ß Angle between a fluid outlet channel and a connection channel

Claims

Patent claims 1. An application device (100) for applying a fluid to an object, in particular for applying cement paste to a sand bed, wherein the application device (100) comprises one or more application units (102), each application unit (102) comprising: - a plurality of closure units (142) for selectively opening or closing a plurality of fluid outlet channels (134); and - at least one application fluid channel (130) for supplying application fluid to the closure units (142); and - one or more valve units (126) for actuating the closure units (142).

2. Application device (100) according to claim 1, characterized in that each application unit (102) comprises a base body (104) which comprises at least one application plate body (114), at least one middle plate body (112) and at least one base plate body (110).

3. Application device (100) according to claim 2, characterized in that a) at least one actuating fluid channel (122) extends parallel to a main extension direction (105) of the application unit (102) in the application plate body (114) and the middle plate body (112), in particular is formed by the application plate body (114) and the middle plate body (112); and / or b) at least one actuating fluid channel (128), in particular a further actuating fluid channel (128), for example a second of two actuating fluid channels (122; 128), extends parallel to a main extension direction (105) of the application unit (114) in the at least one base plate body (110).

4. Application device (100) according to one of claims 2 or 3, characterized in that the application fluid channel (130) runs within the middle plate body (112) and the base plate body (110) and / or is formed by the middle plate body (112) and the base plate body (110), wherein the application fluid channel (130) preferably extends parallel to a main extension direction (105) of the application unit (102).

5. Application device (100) according to one of the preceding claims, characterized in that the application unit (102) comprises at least one actuating fluid channel (122), in particular at least two actuating fluid channels (122; 128), wherein the at least one actuating fluid channel (122) or the at least two actuating fluid channels (122; 128) are assigned to a plurality of valve units (126) of the application unit (102), in particular for supplying and / or discharging actuating fluid, in particular compressed air or a liquid, to or from the valve units (126).

6. Application device (100) according to one of the preceding claims, characterized in that the at least one or more valve units (126) extend transversely, in particular perpendicularly, to the main extension direction (105) of the application unit (102) in the middle plate body (112) and the base plate body (110).

7. Application device (100) according to one of the preceding claims, characterized in that the at least one closure unit (142) comprises at least one closure element (144) and at least one guide element (146), wherein the application fluid can be fed to at least one outlet opening (138) through an interior of the at least one closure unit (142), in particular of the at least one closure element (144), and wherein preferably the interior of the at least one closure element (144) is shaped as a cylinder having a diameter of approximately 0.5 mm to approximately 1 mm, preferably of approximately 0.7 mm to approximately 0.9 mm, and / or wherein preferably the at least one closure element (144) has one or more predetermined deformation sections.

8. Application device (100) according to one of the preceding claims, characterized in that the at least one or more closure units (142) extend transversely, in particular perpendicularly, to the main extension direction (105) of the application unit (102) in the middle plate body (112) and the application plate body (114), wherein the at least one or more Closure units (142) are arranged directly below the application fluid channel (130).

9. Application device (100) according to one of the preceding claims, characterized in that the base body (104) of the application unit (102) comprises at least one cavity (140), which is arranged in particular directly below the application fluid channel (130), wherein the at least one closure unit (126) is arranged in the at least one cavity (140), wherein a pressure chamber (150) extends in the cavity (140) between the closure unit (126) and the base body (104).

10. Application device (100) according to one of the preceding claims, characterized in that the plurality of closure units (142) are connected to a common actuating fluid channel (122) by means of a plurality of connecting channels (152), wherein a fluid connection between the actuating fluid channel (122) and the respective closure unit (142) can preferably be established or interrupted by means of the valve unit (126) assigned to a respective closure unit (142).

11. Application device (100) according to one of the preceding claims, characterized in that the plurality of valve units (126) are arranged linearly one after the other parallel to the main extension direction (105) of the application unit (102) and thereby form a row of valve units and in that the plurality of closure units (142) are arranged linearly one after the other parallel to the main extension direction (105) of the application unit (102) and thereby form a row of closure units, wherein the row of valve units and the row of closure units are arranged parallel to one another.

12. Application device (100) according to one of the preceding claims, characterized in that the at least one closure element (144) is elastically designed and deformable depending on pressure and that the closure element (144) is surrounded by actuating fluid in a use state of the application device (100) and is thus deformable by varying a pressure of the actuating fluid, in particular actuable for selectively opening or closing the associated fluid outlet channel (134).

13. Application device (100) according to one of the preceding claims, characterized in that the closure units (142) comprise or are pinch valves and / or that the valve units (126) comprise or are electrovalves, preferably electromagnetic valves and / or piezo valves.

14. Application device (100) according to one of the preceding claims, characterized in that the application unit (102) comprises an application fluid circuit or forms a component thereof, so that a permanent flow of the application fluid can be maintained in the application fluid channel (130).

15. A method for applying a fluid by means of an application device (100) according to one of claims 1 to 14, wherein the closure unit (142) is actuated hydraulically or pneumatically.

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