EP3788313B1 - Procédé de séchage d'un substrat, module de séchage à air et système de séchage - Google Patents

Procédé de séchage d'un substrat, module de séchage à air et système de séchage Download PDF

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Publication number
EP3788313B1
EP3788313B1 EP19720116.3A EP19720116A EP3788313B1 EP 3788313 B1 EP3788313 B1 EP 3788313B1 EP 19720116 A EP19720116 A EP 19720116A EP 3788313 B1 EP3788313 B1 EP 3788313B1
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EP
European Patent Office
Prior art keywords
air flow
substrate
air
drying
supply air
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EP19720116.3A
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German (de)
English (en)
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EP3788313A1 (fr
Inventor
Bernhard Graziel
Michael Tittmann
Jens Büngener
Vincent Krafft
Larisa Von Riewel
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Heraeus Noblelight GmbH
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Heraeus Noblelight GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

Definitions

  • the invention is about an infrared dryer system for drying a substrate moved in a transport direction through a process space, comprising an infrared dryer module which, viewed in the substrate transport direction, has a sequence of the following components: a front air exchanger unit, one with several in parallel Irradiation room equipped with mutually arranged infrared radiators, and a rear air exchanger unit.
  • Such air dryer modules and drying processes are used, for example, for drying water-based dispersions, inks, paints, varnishes, adhesives or other solvent-containing layers on substrates or for drying moist material sheets made of fleece and other textile materials are used.
  • Infrared dryer systems are used in particular for drying printed products such as paper and cardboard and products made from them.
  • Offset printing machines lithographic printing machines, rotary printing machines or flexographic printing machines are used to print sheet-shaped or web-shaped printing materials made of paper, cardboard, foil or cardboard with printing inks.
  • Typical ingredients of printing inks and inks are oils, resins, water and binders.
  • drying is required, which can be based on both physical and chemical drying processes. Physical drying processes include the evaporation of solvents (especially water) and their diffusion into the printing material. Chemical drying refers to the oxidation or polymerization of printing ink ingredients.
  • infrared dryer systems have other functional modules such as cooling, supply air and exhaust air, which are linked and regulated in various forms in an air management system.
  • this describes DE 10 2010 046 756 A1 a dryer module and a dryer system composed of several dryer modules for printing machines for printing sheet or roll material.
  • the dryer system consists of several infrared dryer modules arranged transversely to the transport direction, each of which has an elongated infrared radiator aimed at the printing material to be dried, the longitudinal axis of which runs perpendicular to the transport direction of the printing material.
  • An adjustable ventilation system creates an air flow that acts on the infrared radiator and the printing material.
  • the infrared radiator is arranged within a process space for the printing material.
  • the supply air is fed to a supply air collection room and heated there by a heating device.
  • the air heated by the infrared heater is removed by means of a fan, added to the heated supply air and the infrared heater is thereby cooled.
  • the heated supply air reaches the process room via gas outlet nozzles in the form of slot nozzles.
  • the gas outlet nozzles are arranged on both sides of the infrared radiator, with the front slot nozzle in the transport direction for the printing material running obliquely to the printing material plane with an orientation opposite to the transport direction, and the rear slot nozzle in the transport direction also running obliquely to the printing material plane with an orientation in the transport direction.
  • the degree of inclination of the slot nozzles can be changed using a motor.
  • the moisture-laden supply air is removed from the process room as exhaust air via an intake duct and partly fed to a heat exchanger, and another part is added to the supply air collection room.
  • the process gas is heated using a specially designed heating device.
  • the heated process gas exits via the slot nozzles in the direction of the printing material as a heated air flow and acts on the printing material to be dried locally and otherwise in a more or less undefined manner until it is sucked out again elsewhere as moisture-laden air.
  • the effectiveness of the drying air in terms of moisture removal from the substrate surface is therefore not exactly reproducible.
  • the CA 2 748 263 C describes a method and a device for drying using heated air flow and ultrasound.
  • the ultrasonic transducers used for this generate ultrasonic waves with a power level in the range of 120 to 190 dB at the interface of the material to be dried and thus contribute to the breakdown of a diffusion boundary layer.
  • the ultrasonic transducers are designed with compressed air support, with a housing being used with a central air outlet, which is surrounded on both sides by an inclined compressed air outlet with an additional ultrasonic transducer and two return air inlets.
  • a nozzle arrangement in an air-assisted web drying device for drying a coated paper web in which an overpressure nozzle is arranged so that it blows drying air both in the running direction of the web and against the running direction of the web.
  • the Nozzle arrangement also includes an impingement nozzle which is combined with the overpressure nozzle, a plurality of nozzle slots being formed in the impingement nozzle in order to blow drying air largely perpendicular to the web.
  • a common suction channel for extracting the exhaust air is arranged between adjacent nozzle arrangements.
  • the DE 10 2016 112 122 A1 describes an LED curing device for UV printing inks, which includes an LED lamp holder with a cooling device and a housing.
  • a partition plate extends from the top of the cooling device of the LED lamp holder to a housing upper wall, which divides the interior of the housing on both sides of the LED lamp holder into a gas suction chamber with a plurality of gas suction openings and into a gas blow-out chamber with a plurality of gas blow-out openings.
  • Both the gas intake opening and the gas exhaust opening are angled so that they form an angle of 45° with the vertical center line of the LED lamp holder.
  • the DE 10 2016 112 122 A1 shows a drying device for a material web moving in the transport direction, with a pressure chamber which is closed at the bottom by a plate, with several openings being provided in the plate for the supply of hot air to the material web.
  • a special feature of the hot air supply is that the axes of the supply air openings are inclined against the direction of movement of the material web.
  • Several extraction channels are arranged in front of and behind the supply air openings.
  • the invention is based on the object of specifying a drying process that is reproducible and effective and, in particular, leads to an improved result in terms of homogeneity and speed of drying of the substrate.
  • the invention is based on the object of providing an energy-efficient air dryer module and an infrared dryer system, which are improved in terms of homogeneity and speed of drying, particularly for the drying of solvent-containing and in particular water-based dispersions.
  • this object is achieved according to the invention, starting from a method of the type mentioned at the beginning, in that the exhaust air flow is divided into several partial flows by supplying each of the partial flows to an individual intake duct, and that in the case of a supply air flow with a directional component in the direction the movement of the substrate, the supply air flow is spatially arranged upstream of the exhaust air flow, and in the case a supply air flow with a directional component in the opposite direction of the movement of the substrate, the supply air flow is spatially arranged downstream of the exhaust air flow, and wherein the intake channels each have an intake channel suction opening facing a drying room, with adjacent suction openings differing in their position and orientation in the drying room.
  • the supply air flow is not diffuse, but has a main direction of propagation in which, depending on the air throughput and flow speed, it penetrates the substrate surface and hits it at a preset angle, where it has a drying effect on the coated substrate.
  • Action here means that the supply air flow dries the substrate, for example by absorbing solvents from the surface layer into the gas phase.
  • the main direction of propagation of the supply air flow forms an angle between 10 and 85 degrees with the surface of the substrate.
  • Each supply air flow directed towards the substrate is spatially assigned an exhaust air flow leading away from the substrate and divided into several partial flows, via which the moisture-laden process gas and other gaseous components emerging from the substrate are removed from a drying room as exhaust air.
  • the flow of exhaust air is generated by suction via an intake duct.
  • the suction channels each have a suction channel suction opening facing a drying room, with adjacent suction openings differing in their position and orientation in the drying room.
  • partial streams are tapped from the “exhaust air flow vortex” at different positions and directions.
  • this is preferably achieved by delimiting and defining the suction openings by air baffles protruding into the drying room.
  • air baffles protruding into the drying room.
  • intake openings are defined and partial flows are branched off from the exhaust air flow vortex and a new flow direction is imposed on them, which is referred to below as the "inflow direction" of the respective partial flow.
  • Each of the suction openings defines its own inflow direction, with the suction openings preferably being oriented so that their respective suction directions differ from one another.
  • suction openings particularly preferably all suction openings, are oriented in such a way that their individual inflow direction and the main propagation direction of the supply air flow are almost opposite, for example including an angle between 0 and 45 degrees.
  • the supply air flow flows out of a longitudinal slot-shaped nozzle opening and acts in strips on the substrate to be dried, and that the exhaust air flow is discharged via several slot-shaped suction channels.
  • the drying air emerges from a slot-shaped inlet opening into the drying room in the direction of the substrate surface.
  • the slot-shaped inlet opening is designed, for example, as a continuous gap or as a series of a large number of individual openings. It acts on the substrate to be dried in a strip-shaped surface area.
  • the intake channels are also slot-shaped and thus the exhaust air partial streams are each preferably strip-shaped and are discharged through a corresponding number of slot-shaped intake channels.
  • the strip-shaped supply air flow is therefore preferably spatially assigned a plurality of parallel strip-shaped exhaust air partial flows.
  • the drying space is arranged transversely to the direction of substrate travel and extends over the entire width of the substrate moving underneath. This means that the entire width of the substrate can be treated and dried homogeneously using the dynamic air.
  • a particularly advantageous embodiment of the method according to the invention is characterized in that the gas volume V in introduced into the drying room is set to be smaller than the gas volume V out sucked out of the drying room by means of a process gas quantity control, whereby the following preferably applies: 1.2 x V in ⁇ V out ⁇ 1.5 x V in .
  • the drying module has a neutral effect on the outside in terms of air quality, which means that the environment is not contaminated by escaping hot and moisture-enriched air; the module is pneumatically sealed.
  • the above-mentioned task is solved according to the invention, starting from an air module of the type mentioned at the outset, in that the exhaust air unit comprises a plurality of intake channels, so that the exhaust air flow is divided into several partial streams, and in that the supply air nozzle has a nozzle opening which corresponds to the exhaust air unit is facing, and wherein the suction channels each have a suction channel suction opening facing a drying room, with adjacent suction openings differing in their position and orientation in the drying room.
  • the nozzle opening of the supply air nozzle thus points towards the substrate surface and at the same time points towards the exhaust air unit.
  • the aim is to maximize the drying room to keep it small and to avoid leakage of air from the drying room as far as possible
  • the air dryer module according to the invention is therefore suitable for use in the method according to the invention.
  • the subdivision of the exhaust air unit into suction channels is preferably carried out in a constructive manner by air baffles protruding into the drying room, which delimit and define at least part of the suction openings of the suction channels.
  • Each of the suction openings is defined by an individual surface normal, whereby the directions of the surface normals can differ from one another. It has proven useful if the respective individual surface normal forms an angle between 90 and 200 degrees with the supply air flow direction.
  • the air dryer module comprises an air supply box in which the supply air unit and the exhaust air unit are integrated.
  • the supply air unit comprising a supply air chamber with a supply air connection and the supply air nozzle, as well as the exhaust air unit, comprising a suction chamber with an exhaust air connection and the suction channels are combined in such a way that they form an independent component that is used in systems for substrate processing as a drying module can be inserted without the need for structural redesign of other areas of the system.
  • the air supply box can also contain a fan that can be assigned to the supply air unit or exhaust air unit.
  • the lateral dimension of the air supply box - viewed in the transport direction of the substrate - is less than 100 mm in preferred embodiments.
  • the drying space is delimited by a first surface in which the supply air nozzle is formed, by a second surface in which the suction channels are formed, and by the substrate.
  • the drying space is essentially delimited by three surfaces and has an approximately triangular shape when viewed in a cross section along the substrate transport direction. It facilitates air circulation in which the supply air flowing out of the supply air nozzle can rise again after contact with the substrate, initially forming a partial vortex, where it can be efficiently captured and sucked out by the intake channels.
  • the dryer module according to the invention due to this measure, rapid and effective drying of the substrate is achieved with at the same time low energy consumption. Given the efficient air management, the air module represents a compact drying unit that saves space in the machine.
  • the distance between the supply air nozzle and the surface of the substrate is preferably adjustable to less than 10 mm.
  • the dryer module according to the invention can be part of a dryer system in which several identical or different dryer modules are combined.
  • the above-mentioned technical problem is solved according to the invention in that the front and/or the rear air exchanger unit each contain at least one air dryer module according to the invention.
  • the dryer system according to the invention is designed, for example, as an infrared dryer module, in which the actual process space comprises an irradiation chamber which is equipped with one or more infrared radiators.
  • the actual process space for example the irradiation chamber, is delimited by at least one air dryer module according to the invention.
  • the actual process space is delimited by several air dryer modules according to the invention, which are in the transport direction can be arranged next to each other and/or one behind the other. Three air dryer modules are preferably arranged one behind the other in the transport direction.
  • each rear drying module arranged downstream of the process chamber in the transport direction the direction of the air flow from the nozzle is directed opposite to the transport direction of the substrate.
  • the direction of the air flow from the nozzle corresponds to the transport direction of the substrate.
  • the front and rear air dryer modules take on the function of air curtains at the inlet and outlet of the dryer system in addition to the functions of separating the flow boundary layer and drying the substrate and thus pneumatically seal the dryer system from the outside.
  • the interaction of the irradiation chamber with the air dryer modules reduces the risk of contaminants, and especially water, entering the process space and outgassing from the dryer system. This enables a particularly low-water process space and improves and optimizes the drying effect.
  • supply air is the air taken from the atmosphere. It can also include synthetically produced gases and gas mixtures that are suitable for physically absorbing water. It can also contain reactive substances for chemical drying of the substrate. To improve drying efficiency, the supply air is preferably preheated to a temperature in the range between 70 and 90 °C.
  • the exhaust air flows out of the drying room via the “intake ducts”.
  • the “intake opening” of an intake duct is the area delimited by a duct edge through which the sucked-in exhaust air enters the intake duct.
  • the suction channels can open into a common suction chamber.
  • spatially downstream or “spatially upstream” refer to the arrangement seen in the transport direction of the substrate.
  • a supply air flow with a directional component in the substrate transport direction has a main propagation direction with a directional component in the substrate transport direction. Accordingly, a supply air flow with a directional component greater than zero against the substrate transport direction is one whose main direction of propagation has a directional component greater than zero against the substrate transport direction.
  • the main direction of propagation is the flow direction of the supply air flow (still uninfluenced by the flow conditions in the drying room) immediately after entering the drying room.
  • the direction is predetermined by the longitudinal axis 25a of the supply air nozzle 25.
  • the one in the irradiation chamber 9 directional arrows 20 indicate an air flow directed towards the surface of the printing material 3
  • the directional arrows 21 indicate an air flow leading away from the printing material 3, as well as an interaction 22 of these air flows with one another.
  • the dryer modules 1 are arranged in pairs next to and behind one another when viewed in the transport direction 5.
  • the pair of dryer modules 1 arranged next to each other covers the maximum format width of a printing press.
  • the dryer modules 1 and the individual infrared radiators can be electrically controlled separately from one another.
  • the air exchanger units 6; 7 are each equipped with their own housing 10 and releasably inserted into the housing of the dryer module 1.
  • the air exchanger units 6; 7 are identical in construction, but in the air exchanger unit 6 the supply air side is in front of the exhaust air side, and in the air exchanger unit 7 it is the other way around.
  • the air exchanger unit 6; 7 also form air dryer modules in the sense of the invention. You will be informed below using the Figures 1 to 3 explained in more detail. If the same reference numbers are used in these figures as in Figure 4 are used, this refers to structurally identical or equivalent components and components, as explained above based on the description of the infrared dryer module 1.
  • the upper supply air chamber 13 is connected to a fan 19, by means of which dry supply air with the volume V in is introduced into the supply air line in a controlled manner.
  • the upper exhaust air chamber 18 is connected to a fan (not shown in the figure), by means of which the moist exhaust air with the volume V out is removed from the exhaust air line in a controlled manner.
  • the process gas quantity control for the drying module 6; 7 is designed so that: 1.2 x V in ⁇ V out ⁇ 1.5 x V in . This means the drying module 6; 7 is pneumatically neutral in the sense that it nominally does not release any other volume of gas into the environment other than via the suction. On the contrary, a certain volume of external air (around 20 to 50% based on the supply air volume) is sucked into the drying module from the environment.
  • the effect of the incoming external air is in Figure 2 indicated by the flow arrows 37.
  • front perforated plate 23 between the upper and middle supply air chamber (13; 14), and a rear perforated plate 24 between the middle and lower supply air chamber (23; 24), the front perforated plate 23 having a first number N1 of supply air passage openings, which have a have a first average opening cross section A1, and wherein the rear perforated plate 24 is provided with a second number N2 of supply air passage openings which are uniformly distributed over the perforated plate 24 and which have a second average opening cross section A2, where: N2>N1 and A1 >A2.
  • the front perforated plate 23 causes a uniform distribution of the supply air volume along the rear perforated plate 24, which in turn serves to distribute the supply air evenly along the slot-shaped air outlet nozzle 25.
  • the lower supply air chamber 15 is connected to a slot-shaped air outlet nozzle 25, the longitudinal axis 25a of which forms an angle ⁇ of 30 degrees with the surface of the substrate to be dried (printing material 3).
  • a supply air flow with a main direction of propagation in the direction of the longitudinal axis 25 reaches the substrate surface via the slot-shaped air outlet nozzle 25 and has a drying effect on the substrate (3) in the drying space 26.
  • the moisture-laden process air reaches the lower exhaust air chamber 16.
  • a second front perforated plate 28 between the lower exhaust air chamber 16 and the middle exhaust air chamber 17, and between the middle ones and upper exhaust air chamber (17; 18) a second rear perforated plate 29, wherein the second front perforated plate 28 has a first number N3 of exhaust air passage openings which have a first average opening cross section A3, and wherein the second rear perforated plate 29 with a second number N4 is provided with exhaust air passage openings which are evenly distributed over the perforated plate 29 and which have a second average opening cross section A4, where: N4>N3 and A3>A4.
  • the perforation in the second front perforated plate 28 is designed so that an internal pressure that is as uniform as possible is established over the length of the lower exhaust air chamber 16.
  • the flow boundary layers that are pulled along and suspended on the moving substrate (3) are broken through. Because the supply air flow direction has a directional component in the direction of the movement of the substrate (3) or in the opposite direction, there is a disruption, reduction or even separation of the fluid dynamic laminar flow boundary layer and, as a result, an improvement in the mass transport and in particular the removal of moisture from the substrate (3) and the drying room 26.
  • the flow direction of the supply air which runs obliquely to the substrate 3 (main propagation direction in the direction of the longitudinal axis 25a), and also a division of the exhaust air flow by a suction, which, depending on the transport direction of the substrate, is either spatially before or after the location of the supply air flow.
  • the supply air flow which runs obliquely to the substrate surface, points towards the exhaust air side.
  • the drying chamber 26 has a substantially triangular shape in the cross section shown.
  • Figure 1 shows the case of a supply air flow with a flow direction component opposite to the transport direction of the substrate 3.
  • the supply air flow is spatially subordinate to the exhaust air flow in the transport direction.
  • a vortex formation of the inflowing and outflowing drying air begins, which is indicated by the directional arrow 27.
  • the direction of rotation of the air vortex 27 that forms is clockwise.
  • the exhaust air flow is controlled with the help of air baffles 30; 31 in several Partial streams divided.
  • the air baffles 30; 31 are angled in the opposite direction to the direction of rotation of the air vortex that forms and form individual intake channels 41 for a total of three partial flows; 42; 43 out, like out Figure 2 recognizable.
  • the formation of vortices is reduced by dividing the exhaust air flow into several partial streams and an air vortex that initially forms is channeled into the intake channels 41, 42, 43.
  • the flow behavior within the drying chamber 26 is indicated schematically by the flow arrows 37, 38 and 39, with the supply air flowing into the drying chamber 26 being designated with the reference number 38 and the exhaust air after reversal of direction with the reference number 39.
  • the external air flowing in independently is designated by reference number 37.
  • the channeling of the exhaust air flow in the intake channels 41, 42, 43 is achieved by the angled air baffles 30; 31 causes which protrude in different positions into the initially and partially forming air vortex 27. They define suction openings 41a, 42a, 43a of the suction channels 41, 42, 43 (marked by dashed lines in the drawing). Adjacent suction openings 41a, 42a, 43a differ in their position and orientation in the drying space 26. As a result, partial flows are tapped from the exhaust air flow vortex 27 at different positions and directions.
  • Each of the suction openings 41a, 42a, 43a is defined by an individual surface normal. The respective surface normal indicates approximately the inflow direction of the relevant partial flow into the intake channel 41; 42, 43 again. The directions of the surface normals and thus the inflow direction differ from one another and form an angle of 180 degrees +/- 30 degrees with the supply air flow direction (longitudinal axis 25a).
  • the local positions in the drying room 26 at which the exhaust air flow is divided are located where the said exhaust air flow vortex 27 would otherwise form in a pronounced manner. This is at least partially resolved, so that the formation of a pronounced exhaust air flow vortex is counteracted by the division of the exhaust air flow, and effective and energy-saving suction is made possible.
  • a quick and effective drying of the substrate 3 is achieved with low energy consumption at the same time.
  • Figure 3 shows schematically a series arrangement of three air dryer modules 7 according to the invention Figure 1 .
  • This arrangement occurs, for example, at the output of an infrared dryer module 1 Figure 4 for use. This ensures that when the printing material 3 exits the infrared dryer module 1, as far as possible no toxic or otherwise undesirable substances in gaseous and liquid form leave the process space unfiltered and uncontrolled.

Claims (15)

  1. Procédé permettant le séchage au moins partiel d'un substrat (3) déplacé dans une direction de transport (5) à travers un espace de séchage (26), comprenant les étapes de procédé suivantes :
    (a) génération d'un écoulement d'air entrant (38) dirigé vers le substrat (3), lequel écoulement présente une direction d'écoulement d'air entrant possédant une composante de direction dans la direction de transport (5) ou dans la direction opposée à celle-ci, et
    (b) génération d'un écoulement d'air évacué (39) s'éloignant du substrat (3),
    dans lequel l'écoulement d'air évacué (39) est divisé en plusieurs écoulements partiels par le fait que chacun des écoulements partiels est amené à un canal d'aspiration (41; 42; 43) individuel, et en ce que, dans le cas d'un écoulement d'air entrant (38) comportant une composante de direction dans la direction de transport de substrat (5), l'écoulement d'air entrant (38) est disposé spatialement en amont de l'écoulement d'air évacué (39) dans la direction de transport (5), et, dans le cas d'un écoulement d'air entrant (38) comportant une composante de direction opposée à la direction de transport (5), l'écoulement d'air entrant (38) est disposé spatialement en aval de l'écoulement d'air évacué (39) dans la direction de transport (5),
    caractérisé en ce que les canaux d'aspiration (41; 42; 43) possèdent respectivement une ouverture d'aspiration (41a; 42a; 43a) de canal d'aspiration tournée vers l'espace de séchage (26), dans lequel des ouvertures d'aspiration voisines diffèrent par leurs positions et leurs orientations dans l'espace de séchage (26).
  2. Procédé selon la revendication 1, caractérisé en ce que l'écoulement d'air évacué (39) est divisé en au moins trois écoulements partiels.
  3. Procédé selon la revendication 1, caractérisé en ce que les ouvertures d'aspiration (41a; 42a; 43a) sont délimitées par des déflecteurs d'air (30; 31) faisant saillie dans l'espace de séchage (26) et chaque ouverture d'aspiration (41a; 42a; 43a) définit une direction d'admission individuelle pour l'écoulement partiel admis respectif, dans lequel les directions d'admission d'écoulements partiels voisins diffèrent les unes des autres.
  4. Procédé selon la revendication 1, caractérisé en ce que plusieurs ouvertures d'aspiration (41a; 42a; 43a), de manière particulièrement préférée toutes les ouvertures d'aspiration (41a; 42a; 43a), sont orientées de sorte que leurs directions d'admission individuelles s'étendent de manière sensiblement opposée à une direction de propagation principale (25a) de l'écoulement d'air entrant (38).
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'écoulement d'air entrant sort d'une ouverture de buse (25) en forme de fente longitudinale et agit en forme de bande sur le substrat (3) à sécher, et en ce que l'écoulement d'air évacué (39) est évacué par l'intermédiaire de plusieurs canaux d'aspiration (41; 42; 43) en forme de fente.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que, au moyen d'une commande de quantité de gaz de traitement, le volume de gaz Vin introduit dans l'espace de séchage est réglé de manière à être plus petit que le volume de gaz Vout aspiré hors de l'espace de séchage, dans lequel ceci s'applique de préférence : 1,2 x Vin < Vout < 1,5 x Vin.
  7. Module formant sécheur à air permettant le séchage d'un substrat (3) déplacé dans une direction de transport (5) à travers un espace de séchage (26), comprenant
    (a) une unité d'air entrant (13; 14; 15; 25), comprenant une buse d'air entrant (25) permettant de générer un écoulement d'air entrant (38) dirigé vers le substrat (3), lequel écoulement possède une direction de propagation principale (25a) formant un angle compris entre 10 et 85 degrés avec la surface du substrat (3),
    (b) une unité d'air évacué (16; 17; 18; 41; 42; 43) permettant de générer un écoulement d'air évacué (39) s'éloignant du substrat (3) et hors de l'espace de séchage (26),
    dans lequel l'unité d'air évacué (16; 17; 18; 41; 42; 43) comprend plusieurs canaux d'aspiration (41; 42; 43), de sorte que l'écoulement d'air évacué (39) est divisé en plusieurs écoulements partiels, et en ce que la buse d'air entrant (25) présente une ouverture de buse tournée vers l'unité d'air évacué (16; 17; 18; 41; 42; 43),
    caractérisé en ce que les canaux d'aspiration (41; 42; 43) possèdent respectivement une ouverture d'aspiration (41a; 42a; 43a) de canal d'aspiration tournée vers l'espace de séchage (26), dans lequel des ouvertures d'aspiration voisines diffèrent par leurs positions et leurs orientations dans l'espace de séchage (26).
  8. Module formant sécheur à air selon la revendication 7, caractérisé en ce que l'unité d'air évacué (16; 17; 18; 41; 42; 43) comprend au moins trois canaux d'aspiration (41; 42; 43).
  9. Module formant sécheur à air selon la revendication 7 ou 8, caractérisé en ce que plusieurs ouvertures d'aspiration (41a; 42a; 43a), de manière particulièrement préférée toutes les ouvertures d'aspiration, sont orientées de sorte que leurs directions d'admission individuelles s'étendent de manière sensiblement opposée à une direction de propagation principale (25a) de l'écoulement d'air entrant (38).
  10. Module formant sécheur à air selon l'une des revendications 7 à 9, caractérisé en ce qu'il comprend un boîtier d'alimentation en air dans lequel l'unité d'air entrant et l'unité d'air évacué sont intégrées.
  11. Module formant sécheur à air selon l'une des revendications précédentes 7 à 10, caractérisé en ce que la distance entre la buse d'air entrant (25) et la surface du substrat (3) est inférieure à 10 mm.
  12. Module formant sécheur à air selon l'une des revendications 7 à 11, caractérisé en ce que l'espace de séchage (26) est délimité par une première surface, dans laquelle la buse d'air entrant (25) est formée, par une seconde surface, dans laquelle les canaux d'aspiration (41; 42; 43) sont formés.
  13. Système formant sécheur permettant le séchage d'un substrat (3) déplacé dans une direction de transport (5) à travers un espace de traitement (9; 26), comprenant un module formant sécheur à infrarouge (1) qui, vu dans la direction de transport de substrat (5), présente une séquence des composants suivants : une unité formant échangeur d'air avant (6), un espace d'irradiation (9) équipé de plusieurs émetteurs infrarouges (8) disposés parallèlement les uns aux autres, et une unité formant échangeur d'air arrière (7), caractérisé en ce que l'unité formant échangeur d'air avant et/ou l'unité formant échangeur d'air arrière contiennent respectivement au moins un module formant sécheur à air (6; 7) selon l'une des revendications 7 à 12.
  14. Système formant sécheur selon la revendication 13, caractérisé en ce que l'unité formant échangeur d'air arrière et/ou l'unité formant échangeur d'air avant comprennent plusieurs modules formant sécheur à air (6; 7) disposés côte à côte et/ou l'un derrière l'autre.
  15. Système formant sécheur selon l'une des revendications 13 ou 14, caractérisé en ce qu'au moins un module formant sécheur à air (6) est monté en amont de l'espace d'irradiation (9) et au moins un module formant sécheur à air (7) est monté en aval de l'espace d'irradiation (9).
EP19720116.3A 2018-05-04 2019-04-25 Procédé de séchage d'un substrat, module de séchage à air et système de séchage Active EP3788313B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018110824.9A DE102018110824B4 (de) 2018-05-04 2018-05-04 Verfahren zum Trocknen eines Substrats sowie Lufttrocknermodul zur Durchführung des Verfahrens sowie Trocknersystem
PCT/EP2019/060582 WO2019211155A1 (fr) 2018-05-04 2019-04-25 Procédé de séchage d'un substrat, module de séchage par air ainsi que système de séchage

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KR102131933B1 (ko) * 2018-08-17 2020-07-09 주식회사 넥서스비 원자층 증착 장치 및 이를 이용한 원자층 증착 방법
EP3932672B1 (fr) * 2020-07-01 2024-05-15 Bobst Bielefeld GmbH Machine d'impression avec un séchoir
CN114872244A (zh) * 2022-05-12 2022-08-09 佛山市盟思拉伸机械有限公司 溶剂膜处理的烘箱单元与烘箱装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2203621C3 (de) * 1972-01-26 1979-05-17 Maschinenfabrik Andritz Ag, Graz (Oesterreich) Vorrichtung zum Trocknen von Materialbahnen
DE2911685C2 (de) * 1979-03-24 1981-03-12 Vits-Maschinenbau Gmbh, 4018 Langenfeld Blaskasten zum schwebenden Führen von Warenbahnen
US5606805A (en) * 1996-04-01 1997-03-04 Meyer; Jens-Uwe Process for drying a coated moving web
FR2790072B1 (fr) * 1999-02-18 2001-05-25 Solaronics Process Dispositif combine de soufflage et d'aspiration a echange energetique integre pour un dispositif de sechage
FI105936B (fi) * 1999-03-18 2000-10-31 Valmet Corp Menetelmä ja laite radan kulun stabiloimiseksi paperikoneessa tai vastaavassa
FI991497A0 (fi) * 1999-06-30 1999-06-30 Valmet Corp Leijukuivaimen suutinjärjestelmä
CN1193204C (zh) * 2000-12-31 2005-03-16 合名会社新兴企业社 用煤作燃料来干燥农产品的设备
ITMI20030273A1 (it) * 2003-02-14 2004-08-15 Percivalle Special Converting S A S Di Percivall Dispositivo e metodo per il trattamento termico di un
US9068775B2 (en) * 2009-02-09 2015-06-30 Heat Technologies, Inc. Ultrasonic drying system and method
DE102010046756A1 (de) * 2010-09-28 2012-03-29 Eltosch Torsten Schmidt Gmbh Trocknermodul für Druckmaschinen
JP5810074B2 (ja) * 2012-12-28 2015-11-11 日本碍子株式会社 乾燥装置
DE102016112122B4 (de) * 2015-12-23 2021-01-07 Qingdao LED optoelectronic technology Co.,LTD LED-Aushärtungseinrichtung für UV-Druckfarben

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EP3788313A1 (fr) 2021-03-10
JP2021522060A (ja) 2021-08-30
DE102018110824B4 (de) 2022-02-10
CN112119276A (zh) 2020-12-22
WO2019211155A1 (fr) 2019-11-07
JP7326335B2 (ja) 2023-08-15
DE102018110824A1 (de) 2019-11-07
CN112119276B (zh) 2023-05-30

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