EP3788313A1 - Verfahren zum trocknen eines substrats sowie lufttrocknermodul sowie trocknersystem - Google Patents
Verfahren zum trocknen eines substrats sowie lufttrocknermodul sowie trocknersystemInfo
- Publication number
- EP3788313A1 EP3788313A1 EP19720116.3A EP19720116A EP3788313A1 EP 3788313 A1 EP3788313 A1 EP 3788313A1 EP 19720116 A EP19720116 A EP 19720116A EP 3788313 A1 EP3788313 A1 EP 3788313A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- air
- air flow
- drying
- supply air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000001035 drying Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000007605 air drying Methods 0.000 title 1
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 23
- 238000007639 printing Methods 0.000 description 21
- 239000007789 gas Substances 0.000 description 18
- 230000015572 biosynthetic process Effects 0.000 description 13
- 239000010410 layer Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000976 ink Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 5
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- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
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- 238000000861 blow drying Methods 0.000 description 1
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Classifications
-
- 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 relates to a process for at least partial drying of a substrate, comprising the process steps:
- the invention relates to an air dryer module for drying a substrate moved in a transport direction through a drying space
- (A) an air supply unit comprising an inlet nozzle for generating a supply air flow directed to the substrate, which has a Hauptausbreitungsraum enclosing with the surface of the substrate an angle between 10 and 85 degrees, and
- the invention relates to an infrared dryer system for drying a moving in a transport direction through a process space substrate, comprising an infrared dryer module, seen in the substrate transport direction, a sequence of the following components: a front air exchanger unit, with a a plurality of infrared radiators arranged parallel to each other equipped irradiation room, and a rear air exchange unit.
- Such air dryer modules and drying methods are used, for example, for drying water-based dispersions, inks, paints, varnishes, adhesives or other solvent-containing layers on substrates or for drying. wet webs of fleece and other textile materials used. Infrared dryer systems find particular application for drying printed products such as paper and cardboard and products thereof.
- printing inks For printing sheet-like or web-like substrates from paper, paperboard, foil or cardboard with printing inks, offset printing machines, lithographic printing machines, rotary printing machines or flexo printing machines are commonly used.
- Typical ingredients of printing inks and inks are oils, flakes, 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 substrate. Chemical drying is understood to mean the oxidation or polymerization of printing ink constituents.
- infrared dryer systems In addition to infrared radiators, conventional infrared dryer systems have other functional components, such as cooling, supply air and exhaust air, which are linked and regulated to different degrees in an air management system.
- DE 10 2010 046 756 A1 describes a dryer module and a dryer system composed of a plurality of dryer modules for printing machines for printing on sheet or roll material.
- the dryer system consists of several infrared dryer modules arranged transversely to the transport direction, each of which has an elongate infrared radiator aligned with the printing material to be dried, whose longitudinal axis is perpendicular to the transport direction of the printing material.
- an air flow is generated, which acts on the infrared radiator and on the substrate.
- the infrared radiator is arranged within a process space for the printing substrate.
- the supply air is supplied to a supply air collecting space and heated therein by means of a heating device.
- the air heated by the infrared radiator is removed by means of a fan, added to the heated supply air, and the infrared radiator is thereby cooled.
- the heated supply air enters the process area via gas outlet nozzles in the form of slot nozzles.
- the gas outlet nozzles are arranged on both sides of the infrared radiator, wherein the slot in the transport direction for the printing material obliquely to the substrate level with an orientation opposite to the transport direction, and the rear slot in the transport direction also oblique to the substrate plane with an orientation in the transport direction.
- the degree of inclination of the slot nozzles can be changed by a motor.
- the supply air laden with moisture is removed as exhaust air via an intake duct and partially fed to a heat exchanger, and another part added to the Zu Kunststoffsammelraum.
- the process gas is heated by means of a dedicated equipment.
- the heated process gas exits via the slot nozzles in the direction of the substrate as a heated air flow and acts on the substrate to be dried locally and otherwise more or less undefined as long as until it is sucked as humidity laden air elsewhere.
- the effectiveness of the drying air with respect to the moisture removal from the substrate surface is therefore not exactly reproducible.
- CA 2 748 263 C describes a method and apparatus for drying by means of heated airflow and ultrasound.
- the ultrasonic transducers used for this purpose 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 reduction of a diffusion boundary layer.
- the ultrasonic transducers are designed with compressed air support, wherein a housing with a central air outlet, which is used on both sides by an obliquely arranged compressed air outlet with additional ultrasonic transducer and two return air inlets.
- WO 01/02643 A1 discloses a nozzle arrangement in an air-supported web drying apparatus for drying a coated paper web, in which an overpressure nozzle is arranged such that it blows drying air both in the running direction of the web and counter to the running direction of the web.
- the nozzle arrangement also comprises a baffle nozzle which is combined with the overpressure nozzle, wherein a plurality of nozzle slots are formed in the baffle nozzle in order to blow drying air substantially perpendicular to the web.
- a common suction channel for the extraction of the exhaust air is arranged between adjacent nozzle arrangements.
- DE 10 2016 112 122 A1 describes an LED curing device for UV printing inks which comprises an LED lamp holder with a cooling device and a housing. From the top of the cooling device of the LED lamp holder to a housing top wall extends a partition plate, which divides the interior of the housing on both sides of the LED bulb holder in a Gasansaughunt with multiple Gasansaugö réelleen and in a Gasausblashunt with multiple Gasausblasö réelleen. Both the gas intake port and the gas exhaust port are slanted so as to enclose an angle of 45 ° with the vertical center line of the LED lamp carrier.
- the invention has for its object to provide a drying process that is reproducible and effective and in particular with respect to homogeneity and speed of drying of the substrate leads to an improved result.
- the object of the invention is to provide an energy-efficient air dryer module and an infrared dryer system, which are improved in particular for the drying of solvent-containing and in particular water-based dispersions with regard to homogeneity and rapidity of drying.
- this object is achieved on the basis of a method of the type mentioned in the introduction by dividing the exhaust air flow into a plurality of partial flows by supplying each of the partial flows to an individual intake duct, and in the case of an intake air flow a direction component in the direction of movement of the substrate, the supply air flow of the exhaust air flow is spatially upstream, and in the case a Zuluftströmung with a direction component in the opposite direction of the movement of the substrate, the supply air flow of the exhaust air flow is spatially ordered.
- the supply air flow is not diffuse but has a main propagation direction in which, depending on the air throughput and flow velocity, it penetrates onto the substrate surface and impinges on it at a pre-set angle, where it dries on the coated substrate.
- acting means that the supply air flow dries the substrate, for example by taking up solvents from the surface layer into the gas phase.
- the main propagation direction of the incoming air flow with the surface of the substrate encloses an angle between 10 and 85 degrees.
- Each supply air flow directed to the substrate is spatially associated with an exhaust air flow leading away from the substrate and divided into a plurality of partial streams, via which the process gas laden with moisture and other gaseous components leaving the substrate are removed as exhaust air from a drying space.
- the flow of the exhaust air is generated by the suction through a suction channel.
- the intake air flow running obliquely to the substrate surface is assigned a suction, which, depending on the transport direction of the substrate, is either spatially located before or after the location of the supply air flow.
- the supply air flow running obliquely to the substrate surface thus always points in the direction of the exhaust air flow.
- the spatial allocation of supply air flow and exhaust air flow on the substrate surface causes an interaction of the respective gas flows with one another and ensures that the air of the flow boundary layer torn open by the intake air flow can be sucked off directly.
- the supply air flow is arranged spatially downstream of the exhaust air flow.
- the sense of rotation of the air vortex forming in this case is determined by the oblique orientation of the supply air flow direction and, in the given case, runs in a clockwise direction.
- the supply air flow of the exhaust air flow is spatially upstream and there is a risk of vortex formation in the exhaust air flow with a direction of rotation counterclockwise.
- the invention therefore provides that the exhaust air flow is divided into a plurality of partial flows by supplying each of the partial flows to an individual intake duct. JE the partial flow is assigned exactly one intake duct; each partial flow is extracted via exactly one intake channel.
- the vortex formation can be reduced by dividing the exhaust air flow into several partial flows.
- a forming air vortex is channeled in the intake ducts and thereby at least partially dissolved. This enables effective and energy-efficient extraction and reduces air consumption.
- a fast and effective drying of the substrate with simultaneously low energy consumption is achieved on the basis of these measures.
- the degree of gas turbulence can be controlled and thus also the effectiveness of drying can be set reproducibly.
- the distribution of the exhaust air flow counteracts the formation of low-exchange zones in a pronounced exhaust air flow vortex. It has proved to be advantageous if the exhaust air flow is divided into at least three partial streams.
- the intake ducts each have an intake duct suction opening facing a drying space, with adjacent intake openings differing in their position and orientation in the drying space.
- partial streams are tapped from the "exhaust air flow vortex" at different positions and directions.
- this is preferably achieved by limiting and defining the intake openings by air baffles projecting into the drying space. Due to the position and orientation of the air baffles, suction openings are defined and branched off from the exhaust air flow vortex partial flows and which impressed a new flow direction, which is referred to below as the "inflow" of the respective partial flow.
- Each of the intake openings defines its own inflow direction, wherein the intake openings are preferably oriented such that their respective intake directions differ from each other.
- a plurality of intake openings are oriented such that their individual inflow direction and the main propagation direction of the supply air flow are nearly opposite, that is, for example, an angle between 0 and Include 45 degrees.
- the supply air flow flows out of a longitudinal slot-shaped nozzle opening and acts in strip form on the substrate to be dried, and that the exhaust air flow is discharged via a plurality of slot-shaped intake ducts.
- the drying air is discharged from a slot-shaped inlet opening into the drying space in the direction of the substrate surface.
- the slot-shaped inlet opening is designed for example as a continuous gap or as a juxtaposition of a plurality of individual openings. It acts in a strip-shaped surface area on the substrate to be dried.
- the intake passages are also slit-shaped and thus also the exhaust air partial flows are each preferably strip-shaped and are discharged through a corresponding number of slit-shaped intake passages.
- the stripe-shaped supply air flow is preferably spatially assigned in each case a plurality of parallel stripe-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 moved underneath.
- the entire width of the substrate can be homogeneously treated and dried by means of the dynamically acting air.
- a particularly advantageous embodiment of the method according to the invention is characterized in that by means of a process gas quantity control the gas introduced into the drying space gas volume V is set at less than the suctioned from the drying chamber gas volume V out, wherein preferably:
- the drying module is aerodynamic to the outside neutral, that is, the environment is not contaminated by escaping hot and humidified air; the module is pneumatically tight.
- the abovementioned object is achieved on the basis of an air module of the type mentioned at the outset in that the exhaust air unit comprises a plurality of intake ducts, so that the exhaust air flow is divided into a plurality of partial flows, and the supply air nozzle has a nozzle opening which facing the exhaust unit.
- the supply air flow emerges obliquely in the direction of the substrate surface.
- the nozzle opening of the supply air nozzle thus points in the direction of the substrate surface and at the same time points in the direction of the exhaust air unit.
- Partial drying of the substrate and air exchange between supply air and exhaust air take place in the drying room.
- the aim is to keep the drying space as small as possible and to avoid leakage of air from the drying room as possible
- the drying module according to the invention is characterized in particular by the combination of the following aspects: (i) By means of the supply air flow directed onto the substrate surface, the flow boundary layers entrained and suspended on the moving substrate are broken through.
- the breakthrough of the flow boundary layers is best achieved when the supply air flow emerging from the nozzle has a main propagation direction which encloses an angle between 10 and 85 degrees with the substrate surface.
- the drying space can be kept compact.
- the longitudinal axis encloses an angle between 30 and 90 degrees with the surface of the substrate.
- the supply air flow is assigned to an exhaust air unit which, depending on the transport direction of the substrate, is either located in front of or after the location of the supply air flow.
- the nozzle opening of the supply air nozzle points in the direction of the exhaust air unit (and not away from the exhaust air unit).
- the supply air flow flowing obliquely to the substrate surface thus always has a directional component in the direction of the exhaust air unit.
- the drying module In the case of a supply air flow with a direction component in the direction opposite to the movement of the substrate, the drying module is oriented such that the supply air unit is arranged spatially downstream of the exhaust air unit. In the other case with a supply air flow with a direction component in the direction of the movement of the substrate, the drying module is oriented so that the air supply unit of the exhaust air unit spatially upstream.
- the invention provides that the exhaust air unit comprises a plurality of intake ducts by means of which the exhaust air flow is divided into a plurality of partial flows, preferably into at least three partial flows in that each of the partial flows is supplied to an individual intake duct.
- Each partial flow is assigned exactly one intake channel; each partial flow is extracted via exactly one intake channel.
- the subdivision of the exhaust air unit in intake ducts is structurally preferably accomplished by the fact that in the drying space baffles protrude, which limit and define at least part of the intake openings of the suction ducts.
- Each of the intake openings is defined by an individual surface normal, wherein the directions of the surface normals may differ from each other. It has proven useful if the respective individual surface normal with the supply air flow direction encloses an angle between 90 and 200 degrees.
- this comprises an air supply box, in which the supply air unit and the exhaust air unit are integrated.
- the Zu Kunststoffaji comprising a supply air chamber with supply air and the supply air
- the exhaust air unit comprising a suction with exhaust port and the intake ducts summarized so that they form an independent component that in plants to the substrate Processing can be inserted as a drying module, without the need for a structural redesign of other plant areas.
- the air supply box may also include a blower to be associated with the supply air unit or exhaust unit.
- the lateral dimension of the air supply box-viewed in the direction of transport of the substrate- is less than 100 mm in preferred embodiments.
- the drying space is bounded by a first surface, in which the supply air nozzle is formed, by a second surface, in which the intake ducts are formed, and by the substrate.
- the drying space is essentially limited by three surfaces and has in a cross section along the substrate transport direction seen in approximately triangular shape. It facilitates air circulation, in which the supply air flowing out of the supply air nozzle can rise again after contact with the substrate, with the initial formation of a partial vortex, where it can be efficiently captured and extracted by the intake ducts.
- the air module is a compact and space-saving dryer unit.
- 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 may 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 exchange unit contain at least one respective 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 chamber comprises a radiation chamber which is equipped with one or more infrared radiators.
- the actual process space for example the irradiation chamber, is limited by at least one air dryer module according to the invention.
- the actual process space is limited by a plurality of air dryer modules according to the invention, which in this case are in transport direction next to each other and / or can be arranged one behind the other.
- three air dryer modules are arranged one behind the other in the transport direction.
- each downstream in the transport direction of the process chamber the rear drying module, the direction of the air flow from the nozzle is directed against the transport direction of the substrate.
- the direction of the air flow from the nozzle coincides with the transport direction of the substrate.
- the front and rear air dryer modules at the inlet and outlet of the dryer system, perform the function of air curtains in addition to the flow boundary layer and substrate drying functions, thus pneumatically sealing the dryer system to the outside.
- the interaction of the irradiation chamber with the air dryer modules reduces the risk that impurities, and in particular water, entered into the process room and outgas from the dryer system. This enables a particularly low-water process space and improves and optimizes the drying effect.
- “Supply air” is in the simplest case the air taken from the atmosphere. It may also include synthetically generated gases and gas mixtures suitable for the physical uptake of water. It may also contain reactive substances for chemical drying of the substrate. To improve the drying efficiency, the feed air is preferably preheated to a temperature in the range between 70 and 90 ° C.
- a “single-inlet opening" of an intake channel is understood to mean the area bounded by a channel edge, through which the sucked exhaust air enters the intake channel.
- the intake ducts can open into a common suction chamber.
- spatially subordinate or “spatially upstream” refer to the arrangement in the transport direction of the substrate.
- a supply air flow having a direction component in the substrate transport direction has a main propagation direction with a direction component in the substrate transport direction. Accordingly, a supply air flow with a direction component greater than zero counter to the substrate transport direction is one whose main propagation direction has a direction component greater than zero opposite to the substrate transport direction.
- the main direction of propagation is that direction of flow of the supply air flow (still uninfluenced by the flow conditions in the drying space) is imprinted immediately after entry into the drying space. In the embodiment shown schematically in FIG. 2, the direction is predetermined by the longitudinal axis 25a of the supply air nozzle 25.
- FIG. 1 shows an embodiment of the air dryer module according to the invention in a cross section along the transport direction of a substrate to be treated
- FIG. 2 shows a section of the air dryer module with details of the flow behavior within the drying space
- FIG. 3 shows a further embodiment of the air dryer module according to the invention in a cross section along the transport direction of a substrate to be treated
- FIG. 4 shows an infrared dryer system equipped with air dryer modules according to the invention in a longitudinal section in the transport direction of the printing material.
- a housing 2 encloses a treatment space
- the in the irradiation chamber 9 indicated directional arrows 20 indicate an airflow directed onto the surface of the printing substrate 3, and the directional arrows 21 indicate an airflow leading away from the printing substrate 3 and an interaction 22 of these air currents with one another.
- a dryer system for example, several of the dryer modules 1 seen in the transport direction 5 are arranged side by side and in pairs.
- the juxtaposed pair of dryer modules 1 covers the maximum format width of a printing press. According to the dimensions and color assignment of the printing substrate, the dryer modules 1 and the individual infrared radiators are electrically controlled separately.
- the air exchange units 6; 7 are equipped with their own housing 10 and inserted into the housing of the dryer module 1 releasably.
- the air exchanger units 6; 7 are identical, but is in the air exchanger unit 6, the supply air side in front of the exhaust side, and in the air exchanger unit 7, it is the other way around.
- the air exchange unit 6; 7 simultaneously form Guttrocknermodule in the context of the invention. They are explained in more detail below with reference to Figures 1 to 3. Insofar as the same reference numerals are used in these figures as in FIG. 4, identical or equivalent components and components are referred to, as explained above with reference to the description of the infrared dryer module 1.
- the cross section of a single air dryer module 6 shown in FIG. 1 comprises a two-part, box-shaped housing 1010 which has an intake air line (supply air duct), an upper supply air chamber 13, a central supply air chamber 14 and a lower supply air chamber 15, and on an exhaust air line (Intake) a lower exhaust chamber 16, a central exhaust chamber 17 and an upper exhaust chamber 18 encloses.
- the upper supply air chamber 13 is connected to a fan 19, by means of which dry supply air is introduced into the supply air line in a controlled manner with the volume V in .
- the upper exhaust chamber 18 is connected to a (not shown in the figure) blower, by means of which the moist exhaust air with the volume V out is controlled removed from the exhaust air line.
- 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 does not deliver any other volume of gas to the environment in nominal terms except through the suction.
- a certain volume of external air (about 20 to 50%, based on the supply air volume) is drawn from the environment into the drying module.
- the effect of the inflowing external air is indicated in FIG. 2 by means of the flow arrows 37.
- a front perforated plate 23 Between the upper and middle supply air chambers (13, 14) there is a front perforated plate 23 and between the middle and lower supply air chambers (23, 24) a rear perforated plate 24, the front perforated plate 23 having a first number N1 of supply air openings having a first central opening cross section A1, and wherein the rear perforated plate 24 is provided with a second number N2 of supply air passage openings uniformly distributed over the perforated plate 24 and having a second central opening cross section A2, where: N2 > N1 and A1> A2.
- the front perforated plate 23 effects a uniform distribution of the supply air volume along the rear perforated plate 24, which in turn serves to distribute the supply air uniformly along the slot-shaped air outlet nozzle 25.
- the lower supply air chamber 15 is connected to a slot-shaped air outlet nozzle 25 whose longitudinal axis 25a encloses an angle a of 30 degrees with the surface of the substrate to be dried (substrate 3). Via the slot-shaped air outlet nozzle 25, a supply air flow reaches the substrate surface with a main propagation direction in the direction of the longitudinal axis 25 and acts dryingly on the substrate (3) in the drying space 26.
- the process air laden with moisture enters the lower exhaust air chamber 16.
- the second front perforated plate 28 has a first number N3 of exhaust air passage openings having a first central opening cross section A3 and the second rear perforated plate 29 having a second number N4 is provided by exhaust passage openings uniformly distributed over the perforated plate 29 and having a second central opening area A4, where N4> N3 and A3> A4.
- the perforation in the second front perforated plate 28 is designed such that over the length of the lower exhaust chamber 16 as uniform as possible internal pressure is adjusted.
- the flow boundary layers entrained and suspended on the moving substrate (3) are broken through. Due to the fact that the supply air flow direction has a directional component in the direction 5 of the movement of the substrate (3) or in the opposite direction, a disturbance, reduction or even detachment of the fluid dynamic laminar flow boundary layer and, concomitantly, an improvement of the mass transfer and in particular the Dissipation of moisture from the substrate (3) and the drying chamber 26 causes.
- the drying space 26 has in the illustrated cross-section substantially triangular shape.
- 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 of the exhaust air flow in the transport direction is arranged spatially downstream.
- 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 forming air vortex 27 extends in a clockwise direction to prevent a pronounced vortex formation, the exhaust air flow with the aid of air baffles 30; 31 in several Split partial streams.
- the air baffles 30; 31 are angled in the opposite direction to the direction of rotation of the air vortex forming and form for a total of three streams individual intake ports 41; 42; 43, as seen from Figure 2.
- the vortex formation is reduced by dividing the exhaust air flow into several part streams and an initially forming air vortex is channeled into the intake channels 41, 42, 43.
- the flow behavior within the drying chamber 26 is schematically indicated by the flow arrows 37, 38 and 39, wherein the incoming air flowing into the drying space 26 is designated by the reference numeral 38 and the exhaust air after direction reversal by the reference numeral 39.
- the independent incoming air outside air is designated by the reference numeral 37.
- the channeling of the exhaust air flow in the intake ports 41, 42, 43 is by the angled baffles 30; 31, which protrude in different positions in the initially and partially forming air vortex 27. They define suction openings 41 a, 42 a, 43 a of the intake ports 41, 42, 43 (marked by dashed lines in the drawing). Adjacent intake openings 41a, 42a, 43a differ in their position and orientation in the drying space 26. As a result, partial streams are tapped from the exhaust air flow vortex 27 at different positions and directions.
- Each of the suction openings 41 a, 42 a, 43 a is defined by an individual surface normal. The respective surface normal gives approximately the inflow direction of the relevant partial stream into the intake channel 41; 42, 43 again. The directions of the surface normals and thus the inflow direction differ from each other and enclose an angle of 180 degrees +/- 30 degrees with the supply air flow direction (longitudinal axis 25a).
- FIG. 3 schematically shows a series arrangement of three air dryer modules 7 according to the invention from FIG. 1. This arrangement is used, for example, at the outlet of an infrared dryer module 1 according to FIG. It is thereby achieved that, when the printing substrate 3 leaves 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.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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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 (de) | 2018-05-04 | 2019-04-25 | Verfahren zum trocknen eines substrats sowie lufttrocknermodul sowie trocknersystem |
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EP3788313A1 true EP3788313A1 (de) | 2021-03-10 |
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US (1) | US20210080177A1 (de) |
EP (1) | EP3788313B1 (de) |
JP (1) | JP7326335B2 (de) |
CN (1) | CN112119276B (de) |
DE (1) | DE102018110824B4 (de) |
WO (1) | WO2019211155A1 (de) |
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KR102131933B1 (ko) * | 2018-08-17 | 2020-07-09 | 주식회사 넥서스비 | 원자층 증착 장치 및 이를 이용한 원자층 증착 방법 |
EP3932672B1 (de) * | 2020-07-01 | 2024-05-15 | Bobst Bielefeld GmbH | Druckmaschine mit einem trockner |
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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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2018
- 2018-05-04 DE DE102018110824.9A patent/DE102018110824B4/de active Active
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2019
- 2019-04-25 WO PCT/EP2019/060582 patent/WO2019211155A1/de active Application Filing
- 2019-04-25 CN CN201980029674.5A patent/CN112119276B/zh active Active
- 2019-04-25 US US17/050,310 patent/US20210080177A1/en active Pending
- 2019-04-25 EP EP19720116.3A patent/EP3788313B1/de active Active
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CN112119276A (zh) | 2020-12-22 |
WO2019211155A1 (de) | 2019-11-07 |
US20210080177A1 (en) | 2021-03-18 |
EP3788313B1 (de) | 2024-01-24 |
DE102018110824A1 (de) | 2019-11-07 |
CN112119276B (zh) | 2023-05-30 |
DE102018110824B4 (de) | 2022-02-10 |
JP7326335B2 (ja) | 2023-08-15 |
JP2021522060A (ja) | 2021-08-30 |
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