Liquid device.

Description

[0001] The invention relates to a liquid device. Furthermore, the invention relates to a liquid device with at least one such liquid device and to a system with at least one such liquid device.

[0002] As is well known, it frequently happens that dosing systems, application systems, transfer systems, or similar equipment, either in their entirety or in part, need to be replaced to meet new or changed requirements. This often necessitates a production interruption.

[0003] Dosing devices are known across various industries; for example, EP 3 608 233 A1 relates to a dosing roller for filling a target container with a metered portion of a powdered product. The dosing roller comprises a roller shell, a filter element, a filter strip, a seal, and a clamping core. The roller shell is provided with at least one dosing opening that completely penetrates the roller shell from its outer to its inner surface, with the dosing opening being limited on the inside by the filter element.

[0004] Similarly, filling machines are known from various documents, such as DE 44 11 545 C1. This describes a device for dosing flaky, fragile materials and addresses the challenge of designing the device for easily breakable materials in such a way that breakage-free or virtually breakage-free dispensing is guaranteed at high dosing rates.

[0005] Furthermore, DE 15 61 494 A1 describes an adhesive application device for corrugated board machines.

[0006] The invention is based on the objective of providing a fluid handling system that can be easily and reliably adapted to different (production) requirements, specifications, and orders, and is therefore particularly versatile. The fluid handling system should also enable particularly efficient and sustainable production. A corresponding fluid handling device and system are to be supplied.

[0007] This problem is solved according to the invention by the features specified in main claims 1, 12 and 14. The core of the invention lies in the opening body and intermediate body, which is capable of engaging at least partially in at least one opening and thus changing their respective, in particular free, liquid intake volume or liquid discharge volume accordingly. Preferably, the surface structure of the liquid device is thus modifiable, at least in certain areas, and in particular reversibly.

[0008] The opening body and intermediate body are capable of interacting with each other. Preferably, they are capable of relative movement, at least in certain areas, when the intermediate body engages with the opening body. It is advantageous if the opening body offers at least partial mechanical resistance to this relative movement and / or the engagement of the intermediate body with the opening body. For example, the intermediate body and / or the opening body can be subjected to a force, such as tensile or compressive force, or the like. The intermediate body can, for example, be subjected to a force such that it changes its volume and / or shape, at least in certain areas. It is preferably flexible, compliant, inflatable, or the like.

[0009] It is advantageous if the liquid intake volume of the at least one opening can be selectively varied, for example, incrementally or continuously. It is beneficial if the at least one opening is closed on one side by the intermediate body, preferably always, and preferably tightly, and is open on the opposite side, facing away from the intermediate body, preferably always, and preferably forming a liquid inlet or outlet. The intermediate body preferably forms a liquid barrier. It is advantageously capable of filling the at least one opening at least partially or in certain areas, for example, completely. The intermediate body then preferably rests tightly against the opening body in or adjacent to the respective opening. It is also advantageous if the intermediate body is capable of remaining disengaged from the opening body, thus leaving the liquid intake volume unaffected.

[0010] It is advantageous if liquid is able to enter the opening body from the side facing away from the intermediate body, provided the intermediate body allows this. The opening body is then able to receive liquid into its openings via their liquid inlets. The liquid can also be discharged from there, for example, to a medium such as a web or sheet, and / or a counterbody such as a roller. The liquid inlets then also form liquid outlets.

[0011] The intermediate body is made, for example, of an elastomer or rubber material. It can be a single piece. Alternatively, it is made up of several intermediate elements that are, for example, (essentially) structurally identical.

[0012] The basic body is preferably rigid or inflexible. For example, it may be manufactured in one piece. Alternatively, it may be formed from several basic elements that are, for example, (essentially) structurally identical.

[0013] The intermediate body is, for example, arranged at least partially directly above the base body or spaced apart from it. For instance, the intermediate body is arranged above the base body. Alternatively, the intermediate body surrounds or encircles the base body, preferably completely, at least partially.

[0014] The opening mechanism is, for example, a single piece. Alternatively, it is formed from several opening elements that are, for example, (essentially) structurally identical. It is advantageous if the opening mechanism is rigid or inflexible.

[0015] Advantageously, the openings are identical in design. For example, they are arranged at least partially in a regular pattern, such as in rows and / or columns, or irregularly. They are preferably spatially limited or spaced apart from each other on their circumference. Advantageously, the openings each have a (substantially) constant cross-section. It is advantageous if the openings each extend in a straight line. The openings may be rounded or chamfered at their ends, or have a different cross-section there. It is advantageous if each opening has a height or depth between 1 mm and 50 mm, preferably between 5 mm and 40 mm. Preferably, each opening has an opening size or, for example, a minimum or maximum transverse dimension, which is between 0.1 mm and 10 mm, preferably between 0.5 mm and 5 mm.

[0016] The opening body is, for example, arranged directly above the intermediate body, at least in some areas. For example, the opening body is arranged above the intermediate body. For example, the opening body surrounds or encircles the intermediate body, preferably completely, at least in some areas. The opening body preferably forms a free working surface facing away from the intermediate body.

[0017] The fluid device has, for example, a central plane, central axis or the like, which is preferably oriented perpendicular or oblique to the medium and / or its conveying direction, if conveyed, longitudinal direction or the like.

[0018] The at least one fluid device and the actuation device are, for example, at least temporarily in operative connection with each other, such as a fluid connection, flow connection, or mechanical connection. In operation, the at least one actuation device is particularly capable of exerting a compressive force and / or tensile force on the intermediate body and / or opening body, or of displacing these at least partially relative to each other.

[0019] The liquid device is designed, for example, as a device for producing a single-sided laminated corrugated board, a gluing unit, a printing device and / or a pre-coating device.

[0020] Further advantageous embodiments of the invention are specified in the dependent claims.

[0021] According to subclaim 2, the liquid device is configured as a liquid metering device, liquid dispensing device, liquid application device, liquid transfer device, adhesive device, pre-coating device, and / or paint device. It, or its working surface, is capable, for example, of metering, dispensing, applying, and / or transferring a liquid. The liquid is, for example, adhesive, a pre-coating (primer), or paint, in particular printing ink.

[0022] The openings according to dependent claim 3 preferably form a connection between the intermediate body and the environment.

[0023] According to dependent claim 4, the openings are arranged in a large part of the opening body, in particular in a large part of an effective liquid area or surface area thereof. Such a liquid device is extremely versatile.

[0024] In the liquid device according to dependent claim 5, the openings are preferably laterally limited or separated from one another by separating elements, in particular thin ones, webs, walls or the like, which preferably form the working surface of the opening body. The working or surface of the opening body is advantageously grid-like or sieve-like.

[0025] The embodiment according to dependent claim 6 allows for a particularly advantageous orientation of the openings relative to one another. Each opening is preferably configured as a polygon, such as a rectangle. In particular, each opening is configured as a regular polygon. It preferably has a corresponding cross-section. The openings are oriented, for example, such that a central plane, central axis, or diagonal thereof runs perpendicular, obliquely, or parallel to a central plane or central axis of the fluid device and / or longitudinal direction and / or conveying direction, if conveyed, of the medium. Alternatively, the openings are, for example, circular, oval, or the like in plan view or cross-section. Combinations of shapes are possible.

[0026] The embodiment according to dependent claim 7 allows for a particularly large change in the amount of liquid that can be received and preferably also discharged in the opening body. The more the intermediate body reduces the liquid intake volume, the less liquid can be received and, consequently, discharged.

[0027] According to dependent claim 8, the intermediate body and / or opening body can be pressurized in at least one partial area, such as the central or outer width, thus allowing for targeted pressurization. This enables particularly reliable and efficient production. Preferably, the effective working area is adjustable. For example, the liquid application system is therefore able to receive or apply different quantities of liquid in different locations. The humidity in the medium that interacts with or receives liquid from the liquid application system can also be adjusted or influenced. Alternatively, for example, different color applications are possible.

[0028] The design according to dependent claim 9 allows for particularly efficient production. The roller is, for example, designed as a solid roller or a hollow roller. It is advantageously mounted rotatably or rotatably. The base body, intermediate body, and opening body preferably have a common longitudinal center axis. This preferably extends horizontally during operation. It is advantageous if the opening body has a fixed, and in particular unchanging, distance to the longitudinal center axis.

[0029] The fluid device according to dependent claim 10 is particularly reliable. It is advantageous if the at least one supply channel has at least one outlet that is arranged adjacent to or facing the intermediate body. It preferably opens towards the intermediate body. Preferably, several supply channels are provided.

[0030] The base body according to dependent claim 11 is, for example, rectangular in shape. It is advantageous if its height is adjustable, particularly in a controlled manner. The intermediate body is advantageously arranged, for example, directly above the base body. The opening body is, for example, fixed in position. The intermediate body is, in particular, able to engage with the opening body, preferably from below.

[0031] According to dependent claim 13, the at least one actuation device is of a hydraulic, pneumatic and / or mechanical type. It comprises, for example, a pump, a compressor, a drive or the like. For example, the at least one actuation device also includes a piston-cylinder unit.

[0032] A preferred embodiment of the invention is described below by way of example with reference to the accompanying drawing. The drawing shows: Fig. 1 a partial view of a system according to the invention, Fig. 2 a device according to the invention for producing a corrugated board web laminated on one side of the in Fig. 1 The system shown, Fig. 3, is a glue line according to the invention. Fig. 1 illustrated system, Fig. 4, a liquid device according to the invention, which is used, for example, in the device for producing a corrugated board web laminated on one side according to Fig. 2 and / or according to the glue line Fig. 3 Fig. 5 shows a cross-section through a liquid device of the liquid device according to Fig. 4 , Fig. 6 an end-side section of the in Fig. 4 or Fig. 5 The illustrated liquid device, Fig. 7 an outer edge region of the illustrated liquid device, and Fig. 8 the in Fig. 7 Marked detail shown at an enlarged scale

[0033] A in Fig. 1 The partially illustrated system comprises a corrugated board plant capable of producing an endless corrugated board web 1 that is laminated on both sides or on two sides.

[0034] The corrugated board plant comprises a first device 2 for producing a first corrugated board web laminated on one side.

[0035] The first device 2 for producing a first corrugated board web laminated on one side is preceded by a first cover web splicing device 3 and a first material web splicing device 4.

[0036] The first deck splicing device 3 comprises a first unwinding unit 7 for unwinding a finite first deck 5 from a first deck roll 6 and a second unwinding unit 9 for unwinding a finite second deck from a second deck roll 8. The finite first deck 5 and the finite second deck are joined together in the first deck splicing device 3 to provide an endless first deck 10.

[0037] The first material web splicing device 4 is designed according to the first cover web splicing device 3. It comprises a third unwinding unit 13 for unwinding a finite first material web 11 from a first material web reel 12, and a fourth unwinding unit 15 for unwinding a finite second material web from a second material web reel 14. The finite first material web 11 and the finite second material web are joined together in the first material web splicing device 4 to provide an endless first material web 16.

[0038] The continuous first cover sheet 10 is fed via a first heating device 17 to the first device 2 for producing a single-sided laminated first corrugated board sheet. The continuous first material sheet 16 is also fed to the first device 2 for producing a single-sided laminated first corrugated board sheet.

[0039] The first device 2 for producing a single-sided laminated first corrugated board web comprises, for producing an endless first corrugated web having a corrugation from the endless first material web 16, a rotatably mounted first corrugating roller 18 and a rotatably mounted second corrugating roller 19 (see also Fig. 2 The corrugating rollers 18, 19 form a first roller gap for guiding and corrugating the endless first web of material 16.

[0040] To join the continuous first cover sheet 10 with the continuous first corrugated sheet 16 to form a single-sided laminated first corrugated board sheet 20, the first device 2 for producing a single-sided laminated first corrugated board sheet comprises a first glue application device 21 and an associated first glue metering device 22. For guiding and gluing the continuous first corrugated board sheet 16, the first glue application device 21 forms a first glue gap 23 with the first corrugating roller 18.

[0041] Glue contained in a first glue reservoir 24 is applied via the first glue application device 21 to the crests of a corrugation on the endless first corrugated web 16. The first glue application device 21 is arranged between the first corrugating roller 18 and the first glue metering device 22. The first glue metering device 22 serves to form a uniform layer of glue on the first glue application device 21.

[0042] The continuous first cover sheet 10 is then joined with the continuous first corrugated sheet 16, which is coated with glue from the first glue container 24, in the first device 2 to produce a first corrugated board sheet laminated on one side.

[0043] To press the continuous first cover sheet 10 against the glued continuous first corrugated sheet 16, which in turn partially rests against the first corrugating roller 18, the first device 2 for producing a single-sided laminated first corrugated board sheet has a first pressure module 25. The first pressure module 25 is advantageously designed as a pressure belt module. It is arranged above the first corrugating roller 18. The first pressure module 25 has two first deflection rollers 26 and a first pressure belt 27, which is guided around the two first deflection rollers 26.

[0044] The first corrugating roller 18 engages partially from below in a space located between the two first deflecting rollers 26, thereby deflecting the first pressure belt 27 through the first corrugating roller 18. The first pressure belt 27 presses against the endless first cover web 10, which in turn is pressed against the glue-coated endless first corrugated web 16, which rests against the first corrugating roller 18.

[0045] The first device 2 for producing a single-sided laminated first corrugated board web comprises a first web tension control device 28, which is arranged upstream of the first pressure module 25 and is associated with the endless first cover web 10.

[0046] The first device 2 for producing a first corrugated board web laminated on one side also has a first corrugating roller changing device 29 which stores a previously inactive pair of corrugating rollers.

[0047] To further convey the first corrugated board web 20, which is laminated on one side, it is fed via a first high-lift transport device 30 to a bridge 31 of the corrugated board plant.

[0048] The corrugated board plant also has a second device 32 for producing a second corrugated board web laminated on one side.

[0049] The second device 32 for producing a second corrugated board web laminated on one side is preceded by a second cover web splicing device 33 and a second material web splicing device 34.

[0050] The second deck sheet splicing device 33 is designed like the first deck sheet splicing device 3. It includes a fifth unwinding unit 37 for unwinding a finite third deck sheet 35 from a third deck sheet roll 36, and a sixth unwinding unit 39 for unwinding a finite fourth deck sheet from a fourth deck sheet roll 38. The finite third deck sheet 35 and the finite fourth deck sheet are joined together in the second deck sheet splicing device 33 to provide an endless second deck sheet 40.

[0051] The second web splicing device 34 is designed like the first web splicing device 4. It includes a seventh unwinding unit 43 for unwinding a finite third web 41 from a third web reel 42, and an eighth unwinding unit 45 for unwinding a finite fourth web from a fourth web reel 44. The finite third web 41 and the finite fourth web are joined together in the second web splicing device 34 to provide an endless second web 46.

[0052] The continuous second cover sheet 40 is fed via a second heating device 47 to the second device 32 for the production of a second corrugated board sheet laminated on one side. The continuous second material sheet 46 is also fed to the second device 32 for the production of a second corrugated board sheet laminated on one side.

[0053] The second device 32 for producing a second corrugated board web laminated on one side is designed according to the first device 2 for producing a first corrugated board web laminated on one side. Reference is made to the previous description. In the second device 32 for producing a second corrugated board web laminated on one side, a second corrugated board web laminated on one side 48 is formed from the continuous second cover web 40 and the continuous second material web 46.

[0054] To further convey the second corrugated board web 48, which is laminated on one side, it is fed to the bridge 31 via a second high-lift transport device 49.

[0055] The corrugated board plant also includes a laminating web splicing device 50, which is designed like the other splicing devices 3, 4, 33, 34. The laminating web splicing device 50 comprises a ninth unwinding unit 53 for unwinding a finite first laminating web 51 from a first laminating web roll 52, and a tenth unwinding unit 55 for unwinding a finite second laminating web from a second laminating web roll 54. The finite first laminating web 51 and the finite second laminating web are joined together in the laminating web splicing device 50 to provide an endless laminating web 56.

[0056] Downstream of the first device 2 for producing a single-sided laminated first corrugated board web, the device 32 for producing a single-sided laminated second corrugated board web, and the laminating web splicing device 50, a preheating device 57 is arranged, comprising three preheating rollers 58, 59, 60 arranged one above the other. The single-sided laminated corrugated board webs 20, 48 and the continuous laminating web 56 are fed to the preheating device 57, wrapping around the respective preheating roller 58, 59, or 60 and thus undergoing preheating.

[0057] Downstream of the preheating device 57, a gluing unit 61 is arranged. The gluing unit 61 has a first gluing device 62 with a first gluing application device 63 and a first glue squeezing device 64, which is associated with the first gluing application device 63 in order to form a uniform glue layer on the first gluing application device 63 or to squeeze off excess glue there (see also Fig. 3 The first gluing application device 63 applies glue from a first glue tray 65 onto a corrugation or ribbing of the first corrugated board web 20 laminated on one side.

[0058] The gluing unit 61 also has a second gluing device 66, which is designed like the first gluing device 62 and is arranged below it. The second gluing device 66 comprises a second gluing application unit 67 and a second glue squeezing device 68, which is associated with the second gluing application unit 67 in order to form a uniform layer of glue on the second gluing application unit 67 or to squeeze off excess glue there. The second gluing application unit 67 applies glue from a second glue tray 69 onto a corrugation or ribbing of the second corrugated board web 48, which is laminated on one side.

[0059] Below the second gluing device 66, the endless laminating track 56 is guided through the gluing unit 61.

[0060] Downstream of the gluing unit 61, the corrugated board plant has a heating and pressing device 70 (only shown schematically in Fig. 1 (shown), which includes a horizontally extending heating table. Adjacent to the heating table is an endless pressure belt guided by guide rollers. A pressure gap is formed between the pressure belt and the heating table, through which the glued, single-sided laminated corrugated board webs 20, 48 and the endless laminating web 56 are guided, forming the endless, double-sided laminated corrugated board web 1. The endless corrugated board web 1 has a total of five layers.

[0061] Downstream of the heating and pressing device 70, the corrugated board machine has a longitudinal cutting / creasing device (not shown) which is able to cut and crease the endless corrugated board web 1 to form partial corrugated board webs in order to simplify subsequent folding.

[0062] Downstream of the longitudinal cutting / creasing device, the corrugated board plant has a diverter (not shown) for dividing the produced partial corrugated board webs into different levels.

[0063] Downstream of the switch, the corrugated board plant has a cross-cutting device (not shown) with cross-cutting devices arranged one above the other to cut the partial corrugated board webs completely perpendicular to a corrugated board transport direction 71, producing corrugated board sheets.

[0064] Downstream of each cross-cutting device, a conveyor belt (not shown) is arranged to guide the corrugated cardboard sheets to a respective stacking tray (not shown).

[0065] A printing unit (not shown) can be integrated into the corrugated board machine to produce a printed continuous corrugated board web or corrugated board sheets. Alternatively, the printing unit is located upstream of the corrugated board machine. A web can be printed there and then wound back into a roll, which is then used in the corrugated board machine, for example, as a laminating web. The printing unit operates with at least one printing color.

[0066] The following refers to the Figuren 4 bis 8 The construction of the first glue application device 21 is described in more detail.

[0067] The first glue application device 21 is designed as a glue application roller and comprises a hollow cylindrical elongated base body 72.

[0068] Two bearing bodies 73 are arranged on the base body 72. The bearing bodies 73 are preferably identical and arranged in the axial end regions of the base body 72. The bearing bodies 73 and the base body 72 are in a rotationally fixed connection to each other. Each bearing body 73 carries on its outer side a cylindrical bearing journal 74, which forms an axis of rotation of the first glue application roller 21 that coincides with a longitudinal center axis M. The base body 72 is rigid and has an axial width that is at least as wide as the endless first material web 16 or the endless first corrugated web.

[0069] The first glue application roller 21 also comprises an intermediate body 75, which preferably extends adjacent to an outer circumferential surface 77 of the base body 72, forming an annular gap 76. The intermediate body 75 has an annular cross-section and extends around the longitudinal central axis M. It is, for example, tubular or hollow cylindrical and made of a compliant or flexible material. It preferably extends (essentially) over the entire axial width of the base body 72. The annular gap 76 is bounded radially inwards by the base body 72 and radially outwards by the intermediate body 75.

[0070] A grid-like opening body 78 is arranged externally with respect to the intermediate body 75, thus forming an outer body. The opening body 78 has an annular cross-section and is preferably in direct contact with the intermediate body 75. It is hollow cylindrical and extends around the longitudinal central axis M. The intermediate body 75 is thus arranged between the base body 72 and the opening body 78. It preferably extends (essentially) over the entire axial width of the base body 72.

[0071] The opening body 78 has a plurality of continuous openings 79, each establishing a connection between the intermediate body 75 and the surroundings. Each opening 79 is spatially limited circumferentially and extends radially. The openings 79 are identical in design. They are preferably arranged (essentially) throughout the entire opening body 78. They are arranged over its circumference and axial width. Each opening 79 has a radial depth T and a constant opening area in cross-section or plan view. Furthermore, each opening 79 has a corresponding volume V, which here is a glue intake volume or glue discharge volume. The intermediate body 75 extends beneath and over the openings 79.

[0072] Each bearing body 73 has a plate-like end piece 80 arranged on its end face, which has a corresponding central opening for the respective bearing journal 74 and covers the base body 72 at its end face. Each end piece 80 spatially defines the intermediate body 75 and opening body 78 relative to the adjacent base body 72. It also axially limits the annular gap 76. The end pieces 80 extend parallel to each other.

[0073] In each bearing body 73, an axially extending feed 81 is arranged centrally. Furthermore, several distribution channels 82 are arranged in each bearing body 73, which are in flow communication with the respective feed 81 and extend radially outwards from this feed 81. The distribution channels 82 arranged in each bearing body 73 are preferably arranged in a plane and at angular intervals from one another.

[0074] The base body 72 contains several actuation channels 83, which extend radially and completely penetrate the base body 72. Each actuation channel 83 establishes a flow connection between a distribution channel 82 and the annular gap 76. Each actuation channel 83 has a radially inner inlet and a radially outer outlet.

[0075] Each feeder 81 is in flow connection with a supply unit 84, which is, for example, part of the first device 2 for producing a first corrugated board web laminated on one side. For example, a corresponding common supply unit 84 is provided.

[0076] The first glue container 24 is located on the outside of the opening body 78, i.e., on its working surface. It is applied to the crests of the corrugations of the continuous first material web 16 or corrugated web. The first glue metering device 22, designed as a glue metering roller, rests against the outside of the opening body 78 and serves to form a uniform layer of glue on the opening body 78. The first glue application roller 21 rotates about its longitudinal central axis M and extends perpendicular to the conveying direction of the continuous first material web 16 or corrugated web. The first glue metering roller 22, which extends parallel to the first glue application roller 21, also rotates accordingly.

[0077] When the application device 84 is out of operation or operating at low power, the intermediate body 75 remains undeformed. It seals the openings 79 radially and tightly on the inside, extending only outside or below them. In particular, it does not engage the openings 79 radially. Adhesive can thus be absorbed through the full liquid absorption volume V in the respective opening 79 and also released accordingly onto the continuous first material web 16.

[0078] When the application device 84 is in operation or operated with sufficient power, a pressure force is generated in the annular gap 76 via an application fluid through the feeds 81, the distribution channels 82, and the application channels 83. This pressure force acts on the intermediate body 75 from the radial inside. In particular, the intermediate body 75 experiences a uniform pressure from the radial inside to the radial outside. The intermediate body 75 is moved or pressed radially outward toward the opening body 78. Depending on the pressure of the application fluid, the intermediate body 75 is pressed radially inside into the openings 79, thereby reducing their fluid-holding volume V from the radial inside. The intermediate body 75 is convex radially outward in the region of each opening 79, for example, dome-shaped. It lies close to the opening body 78 and forms an adhesive barrier.Different levels of stress and corresponding positions of the intermediate body 75 are in . Figur 8 The example is shown with dashed lines.

[0079] The further the intermediate body 75 engages radially inside the respective opening 79, the less glue can be absorbed and subsequently released. The openings 79 are thus only able to partially absorb and release glue. The amount of glue applied or dispensed can therefore be metered. It can be changed during production without stopping the process.

[0080] If the pressure on the intermediate body 75 is reduced again, its engagement with the opening body 78 is also reduced again.

[0081] Alternatively or additionally, the first glue dosing device 22 is designed like the first glue application device 21 and is thus able to receive or dispense different quantities of glue via its working surface.

[0082] The second device 32 for producing a second corrugated board web laminated on one side is preferably equipped analogously to the first device 2 for producing a first corrugated board web laminated on one side with a corresponding glue application device 21 and / or glue metering device 22.

[0083] Each feeder 81 is in flow connection with a supply unit 84, which is, for example, part of the second device 32 for producing a second corrugated board web laminated on one side. For example, a corresponding common supply unit 84 is provided.

[0084] The first gluing application device 63 and / or the second gluing application device 67 are preferably designed like the first gluing application device 21. They are thus able to receive and dispense different quantities of glue. Each gluing application device 63, 67 is in direct contact with the respective single-sided laminated corrugated board web 20 or 48 and applies glue from below onto its corrugation or ribbing.

[0085] Alternatively or additionally, the first glue squeezing device 64 and / or the second glue squeezing device 68 are designed like the first glue application device 21 and are thus able to receive and dispense glue in varying quantities. They are located on the outside of the first and second gluing application devices 63 and 67, respectively.

[0086] Each feeder 81 is in flow connection with a supply unit 84, which is, for example, part of the glue assembly 61. For example, a corresponding common supply unit 84 is present.

[0087] Alternatively, the endless double-sided laminated corrugated cardboard sheet 1 is, for example, three-ply or seven-ply.

[0088] It is advantageous if the printing device has at least one printing roller or metering roller designed like the first glue application device 21 and thus capable of receiving and dispensing different quantities of printing ink. The printing device is in particular designed as a screen printing device or flexographic printing device.

[0089] The terms "downstream", "upstream", "upstream", "downstream" or the like used here refer in particular to the promotion of the railway(s).

Claims

1. Liquid device, a) having a base body (72), b) having an intermediate body (75) arranged above the base body (72), and c) having an opening body (78) arranged above the intermediate body (75) and having openings (79), characterised in that d) the intermediate body (75) and / or the opening body (78) can be acted upon in such a way and the intermediate body (75) is designed in such a way that the intermediate body (75) is able to alter a liquid intake volume (V) of at least one opening (79), in particular of at least a plurality of openings (79) by at least partially engaging therewith.

2. Liquid device according to Claim 1, characterised in that it is designed as a liquid metering device (22, 64, 68), liquid squeezing device (22, 64, 68), liquid application device (21, 63, 67), liquid transfer device (21, 63, 67), adhesive application device (21, 22, 61, 62, 63, 64, 66, 67, 68), pre-coating device and / or colouring device.

3. Liquid device according to Claim 1 or 2, characterised in that the openings (79) are respectively through-holes.

4. Liquid device according to one of the preceding claims, characterised in that the openings (79) are arranged in a region of the opening body (78) that constitutes at least 60%, preferably at least 80%, of the opening body (78).

5. Liquid device according to one of the preceding claims, characterised in that the opening body (78) is designed as a lattice body or screen body.

6. Liquid device according to one of the preceding claims, characterised in that the openings (79) are respectively angular in a plan view.

7. Liquid device according to one of the preceding claims, characterised in that the intermediate body (75) and / or opening body (78) can be acted upon in such a way that the intermediate body (75) is able to reduce the liquid intake volume (V) of the at least one opening (79) by at least 5%, preferably at least 10%, preferably at least 20%, preferably at least 30%, preferably at least 40%, preferably at least 50%, preferably at least 60%.

8. Liquid device according to one of the preceding claims, characterised in that the intermediate body (75) and / or opening body (78) can be acted upon in a spatially limited manner, wherein the spatial limitation can preferably be altered.

9. Liquid device according to one of the preceding claims, characterised in that the base body (72) is designed as a roller, wherein the intermediate body (75) is preferably annular in cross-section and the opening body (78) is preferably annular in cross-section.

10. Liquid device according to Claim 9, characterised in that at least one actuation channel (83) is arranged in the base body (72) for acting upon the intermediate body (75), in particular from the inside.

11. Liquid device according to one of Claims 1 to 8, characterised in that the base body is plate-shaped.

12. Liquid apparatus, a) having at least one liquid device according to one of the preceding claims, and b) having at least one actuation device (84) connected to the at least one liquid device at least temporarily for acting upon the intermediate body (75) and / or opening body (78).

13. Liquid device according to Claim 12, characterised in that the at least one actuation device (84) is of the hydraulic, pneumatic and / or mechanical type.

14. System, a) having at least one liquid device according to Claim 12 or 13, and b) having a corrugated cardboard plant, which comprises i. at least one device (2, 32) for producing at least one single-face corrugated cardboard web, ii. a device (70) for producing a double-faced corrugated cardboard web, which has at least one single-face corrugated cardboard web (20, 48), and iii. a gluing unit (61) arranged between the at least one device (2, 32) for producing at least one single-face corrugated cardboard web and the device (70) for producing a double-faced corrugated cardboard web for applying adhesive to the at least one single-face corrugated cardboard web (20, 48), c) wherein the at least one liquid device is part of the corrugated cardboard plant or arranged upstream thereof.

15. System according to Claim 14, characterised in that the at least one liquid device is part of the at least one device (2, 32) for producing at least one single-face corrugated cardboard web, the gluing unit (61), a printing device and / or a pre-coating device.