EP3781404B1 - Machine de traitement dotée d'un séchoir à rayonnement et procédé destiné au fonctionnement - Google Patents

Machine de traitement dotée d'un séchoir à rayonnement et procédé destiné au fonctionnement Download PDF

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Publication number
EP3781404B1
EP3781404B1 EP19719223.0A EP19719223A EP3781404B1 EP 3781404 B1 EP3781404 B1 EP 3781404B1 EP 19719223 A EP19719223 A EP 19719223A EP 3781404 B1 EP3781404 B1 EP 3781404B1
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EP
European Patent Office
Prior art keywords
air
radiation source
blower
processing machine
housing
Prior art date
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EP19719223.0A
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German (de)
English (en)
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EP3781404A1 (fr
Inventor
Maik Walter
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Koenig and Bauer AG
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Koenig and Bauer AG
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Priority to EP22185084.5A priority Critical patent/EP4098447B1/fr
Publication of EP3781404A1 publication Critical patent/EP3781404A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0409—Ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0483—Drying combined with cooling

Definitions

  • the invention relates to a processing machine with a drying device, in particular a printing material or sheet processing or substrate processing machine, especially a printing press, and a method for operating the drying device of the processing machine.
  • UV emitters installed in a UV module on printing material processing machines are cooled during operation. Cooling of a UV radiator is also necessary at higher outputs so that it does not reach the transformation temperature of the glass tube and thus sags or even puffs up.
  • Exhaust air cooling systems for cooling UV radiators are known. Ambient air flows past the UV emitter through an air inlet opening in the housing, with the air inlet opening also being the radiation outlet opening.
  • the disadvantage is that the UV radiator, as a result of the structural design, is primarily cooled on the top.
  • the underside is generally significantly hotter, as there is insufficient convection.
  • the heat dissipation on the underside takes place in addition to heat radiation through heat conduction from the glass tube to the well-cooled top. From the DE 694 13 439 T2 and the EP 1 625 016 B1 it is known to blow a UV radiator from the air duct of the housing profile by means of supply air cooling.
  • This supply air cooling is significantly more effective than exhaust air cooling and significantly reduces the glass tube temperature on the top of the UV lamp.
  • that's on the temperature of the underside of the glass tube only has an insufficient influence, since the heat conduction in the glass tube from the bottom to the top is limited.
  • an irradiation device wherein the radiation source in the irradiation device is arranged to be rotatable about its longitudinal axis in connection with an intake air cooling system.
  • the disadvantage of this solution is that it works with an intake air cooling system and has moving parts that are prone to failure, making it complex and uneconomical.
  • a UV irradiation device in which a first flow of cooling air is sucked into the housing on the sides via air inlet openings in the outer wall in order to cool the bulkhead system from the outside.
  • the cooling air is routed along the housing wall into a central suction duct and from there, via a collector, to a fan that promotes the entire flow of cooling air for the UV irradiation device.
  • a second flow of cooling air is collected in the area of the radiation source by a long-necked suction duct and fed into the collector via a throttle.
  • a disadvantage of this solution is that this exhaust air cooling does not adequately cool the underside of the radiation source.
  • the DE 102 47 464 A1 shows a dryer device with an infrared radiator, with a main dryer assembly being arranged downstream of an after-dryer assembly.
  • the dryer device is sealed off from cold ambient air.
  • an ultraviolet curing apparatus using a UV ray tube is known.
  • the distance between the reflectors and the radiator is adjusted via the length of the radiator.
  • an air pipe is used, which directs cooling air directly onto the radiator.
  • the cooling air discharged from the air duct is configured to increase in amount as it is farther from an exhaust side.
  • FIG. 12 shows a cooling apparatus for an ultraviolet lamp using blown air to cool substrate in order to prevent in advance damage that may be caused by malfunction of the shutter members of the housing.
  • the object of the invention is to provide an alternative processing machine with a drying device or an alternative method for operating a drying device of a processing machine.
  • the cooling on preferably high-performance dryers in processing machines, such as substrate or printing material processing machines, should be improved.
  • the cooling of a UV radiator should also be further improved on the underside.
  • the invention has the advantage that an alternative processing machine with a drying device or an alternative method for operating a drying device of a processing machine is created.
  • cooling on powerful dryers in processing machines, such as substrate or printing material processing machines, in particular printing machines, is preferred or sheet processing machines, improved.
  • the cooling of a UV radiator on the underside is also particularly preferably further improved.
  • the drying device is preferably used in a sheet-processing or substrate-processing machine, especially a printing press, or such a machine is equipped with one or more such drying devices.
  • the drying device can preferably also be used optionally as an intermediate dryer or as a final dryer, for example in a delivery.
  • a tabular substrate for example sheet metal, can be processed as the substrate.
  • material in rolls or sheets can also be processed, in particular printed or painted.
  • a particular advantage of exhaust air cooling is that ozone generated by UV radiation is simultaneously extracted from the drying device, for example a UV module.
  • ozone is harmful to human health, on the other hand, ozone absorbs UV radiation and thus reduces the curing effect of the drying device, in particular the UV module.
  • a blown air system results in improved air flow with the favored exhaust air cooling.
  • the ambient air in particular the ambient air located outside of the drying device or in contact with a printing substrate, is preferably guided in a targeted manner by additional directed air and/or blown air in such a way that both the ambient air and the additional air or blown air are optimally guided around the radiation source as cooling air is removed before the common cooling air as exhaust air through one or more air outlet openings, in particular sucked off, is.
  • the radiation source can be cooled indirectly and/or directly on the underside by air flows introduced on one side or preferably on both sides, for example blast air flows or blast air jets Blown air is introduced or blown in, in particular outside the radiation range of a UV module. If air is preferably introduced or blown in on both sides, it can meet, for example, in the middle below the UV module or below the radiation source.
  • the radiation source in particular a UV emitter, can also be partly blown directly on from below.
  • blown air is guided parallel to or in the plane of the air inlet opening of the housing, so that the blowing device is not in the beam path of the radiation from the radiation source.
  • the blown air is thus preferably generated at least approximately parallel to the web of processing material or a web of printing material.
  • cooling air in the drying device in particular in the UV module, in an improved or optimized manner to the underside of the radiation source and the underside is therefore better cooled.
  • the cooling is advantageously more turbulent and, surprisingly, the upper side of the radiation source is also cooled better, which has been proven by investigations, specifically using temperature measurements.
  • the additional air or blown air is introduced or blown in over the entire length of a drying device, for example the UV module, or the radiation source.
  • a drying device for example the UV module, or the radiation source.
  • This can be done by air guiding elements, such as metal sheets, and/or blown air openings, in particular nozzles.
  • the air introduced or blown in on both sides can be either a partial mass or at least approximately all of the cooling air discharged in the UV module.
  • the air volume flow of the air that is additionally introduced or blown in by the blast air system can preferably be between 20% and 50% of the total cooling air volume flow. Accordingly, the proportion of inflowing ambient air can be between 80% and 50%.
  • the radiation sources in particular UV emitters, can thus be operated particularly advantageously with even higher power or the air mass flow can be reduced with the same cooling. Another advantage is that a bending or blowing up of a UV radiator can be avoided more reliably.
  • the blown air system is designed as an add-on module or additional module, which can be designed to be detachably or non-detachably connectable to a UV module of a dryer.
  • the blown air system can be designed to be placed on any UV module of a dryer.
  • the add-on module comprises, in particular, separate air guiding elements or air guiding channels, which are provided for influencing or adjusting the ambient air volume flow flowing around the radiation source.
  • An add-on module or additional module can easily be used to retrofit dryers.
  • a disc spaced apart from the housing of the UV module could also be provided in the beam path of the radiation source, as long as a sufficient air volume flow flowing into at least one air inlet opening is ensured.
  • Substrates or printing materials are conveyed through the machine in processing machines such as printing material processing machines, in particular printing presses or sheet-fed processing machines, for example sheet-fed printing machines, in particular sheet-fed offset rotary printing machines, preferably in aggregate and in-line construction.
  • processing machines such as printing material processing machines, in particular printing presses or sheet-fed processing machines, for example sheet-fed printing machines, in particular sheet-fed offset rotary printing machines, preferably in aggregate and in-line construction.
  • sheet processing machines for example, sheets of printing material are gripped by cylinders or drums at the front edge and conveyed or transported through the machine while the cylinders are rotating. The sheets of printing material are transferred between the cylinders in the gripper closure.
  • the substrates run through various printing units on the conveying path, in which they are each printed with a printing color corresponding to the desired motif.
  • Each of the printing units can, for example, include a plate cylinder, which is inked by an inking unit with the printing ink used.
  • This inked plate cylinder transfers the printing ink appropriate to the motif to a rubber cylinder provided with a rubber blanket, which forms a printing gap with a printing cylinder of a sheet-fed printing press that conveys the substrate sheet forms.
  • the corresponding motif is transferred from the inked rubber blanket of the rubber cylinder to the substrate sheet.
  • the finished printed sheets of printing material can be laid out in a delivery of a sheet-fed printing press to form a delivery stack.
  • the last printing unit can also be followed, for example, by one or more varnishing units which provide the printed sheets of printing material with a protective varnish or glossy varnish.
  • UV inks are preferably used in the printing units and UV varnishes in the coating units.
  • a printing machine can contain a turning device for double-sided perfecting printing. Alternatively, however, other printing methods, for example with variable motifs, can also be used.
  • a drying device or an intermediate dryer in the machine is designed in particular as a UV drying device and includes, for example, one or more UV modules 1.
  • the 1 shows, for example, part of a delivery of a sheet-fed printing press with a drying device arranged above a sheet conveying path, in particular with a dryer, which has a plurality of UV modules 1.
  • the drying device can also have a hot-air dryer, among other things.
  • gripper carriages 5 are arranged on chains and are driven by these endlessly revolving, which take over the processed sheets 4 at their front edge from the last cylinder and promote them on the sheet conveying path to the delivery stack.
  • the UV modules 1 are arranged at a specified distance from the sheet conveying path, so that the circulating gripper carriage 5 can move unhindered.
  • the sheets 4 can be guided over sheet guide plates 6, with an air cushion being able to be formed between the sheet 4 and the sheet guide plates 6.
  • the UV modules 1 in the ascending branch of the circulating chains and / or in a Delivery extension can be arranged.
  • a drying device can also be arranged below the sheet conveying path.
  • the UV modules 1 each have UV emitters 2 whose UV radiation is directed onto the surface of the sheet 4 directly or via reflectors 3 .
  • the treated sheet surface in particular the printed UV ink and/or the applied UV varnish, is dried or cured by this UV radiation acting on the sheet 4 .
  • Mercury vapor lamps are preferably used as radiation sources in the UV modules 1 .
  • emitters with other wavelengths such. B. infrared dryer, are used.
  • slide-in shafts into which the UV modules 1 can be inserted can be provided in the machine or delivery.
  • the UV modules 1 can be fixed in these slots, making it possible to replace the UV modules 1, e.g. B. wear of the UV lamp 2 is guaranteed.
  • the UV modules 1 work in particular with exhaust air cooling.
  • the 2 shows a drying device, in particular a UV module 1, on a sheet-guiding cylinder 7 of a sheet-processing machine, for example the sheet-fed printing press described above.
  • the UV module 1 is assigned to the sheet guiding cylinder 7 of a work, in particular as an intermediate dryer.
  • the sheet guiding cylinder 7 preferably contains gripper systems, which are designed here in particular as clamping grippers with gripper fingers and gripper pads. The gripper fingers fix the leading edge of the sheet by a gripping movement on the gripper pads, so that the sheet 4 is fixed for transport on the lateral surface of the sheet guiding cylinder 7 rotating in the direction shown.
  • the UV module 1 can be arranged in a printing, coating, drying or processing unit etc. of the machine.
  • the UV module 1 can, in particular, between the printing units of the machine for drying one or several colors or varnishes, in particular UV colors or UV varnishes, are used.
  • the intermediate dryer can also be plugged into an insertion shaft of the machine and can therefore be designed to be exchangeable.
  • the UV modules 1 can be interchangeable between the slide-in shafts of the intermediate dryer and the delivery.
  • the UV module 1 designed as an intermediate dryer works in particular with exhaust air cooling.
  • the 3 shows a UV module 1, which accommodates a UV radiation source, in particular a gas discharge tube filled with mercury vapor, extending longitudinally transversely to the conveying direction of the processing material, for example the printing material or sheet 4.
  • the UV module 1 can, for example, be assigned to an insertion shaft of the machine, which preferably also has electrical or pneumatic connections for supply. The corresponding electrical or pneumatic connections can be provided in the slide-in slot, for example.
  • a blown air system 13 is assigned to the UV module 1, which extends in particular over the maximum material width to be processed by the machine, for example the width of the printing material.
  • the blast air system 13 has an overpressure supply, which includes, for example, an overpressure connection or preferably an overpressure generator.
  • the overpressure generators can be embodied as fans, in particular as axial fans 14, preferably distributed over the width of the printing material.
  • Fans, in particular axial fans 14, can be supplied with electricity separately or together with the UV module 1.
  • the UV module 1 On the side facing the processing material or printing stock, the UV module 1 has an air inlet opening 10 for the ambient air, ie the air that comes into contact with the substrate or printing stock or is in the beam path of the UV module 1 .
  • the air inlet opening 10 is here in particular at the same time the radiation outlet opening of the UV radiator 2 of the UV module 1.
  • the 4 shows the cross section of the UV module 1 according to the section AA of the previous figure with deactivated blown air system 13.
  • the UV module 1 can in particular have a housing profile 8 in which an exhaust air duct 12 is preferably arranged.
  • an extrusion profile of the UV module 1 can typically be made of aluminum.
  • the reflectors 3 installed in known shutters 9 reflect the radiation of the UV radiator 2 to the substrate or printing material.
  • the shutters 9 are preferably provided in the housing profile 8 along the UV radiator 2 .
  • the shutters 9 are preferably designed to be movable and/or liquid-cooled.
  • the shutters 9 each have, for example, an axis of rotation which is arranged parallel to the extension of the UV radiator 2 and about which the shutters 9 can move.
  • the air inlet opening 10 of the housing profile 8 is in particular closed. During operation, the shutters 9 are accordingly held in a position that releases the air inlet opening 10 .
  • the cooling air then flows between the shutters 9 in the exhaust air duct 12 of the housing profile 8.
  • the exhaust air duct 12 is preferably connected on one side to a suction air source that can be controlled or regulated, for example, and which sucks the exhaust air into the exhaust air duct 12 .
  • the exhaust air duct 12 preferably extends over the entire length of the UV emitter 2 so that the air heated by the UV emitter 2 can be sucked off into the exhaust air duct 12 through distributed openings.
  • the exhaust air duct 12, which extends along the radiation source, in particular the UV radiator 2 is connected to the space surrounding the UV radiator 2 via elongated holes spaced apart from one another.
  • the elongated holes are preferably dimensioned in such a way that they differ from one another in terms of their opening areas.
  • the The opening areas of the elongated holes between the ends of an elongated UV radiator 2 have smaller dimensions than the elongated holes provided at the respective ends of the UV radiator 2 .
  • the opening areas of the elongated holes between the ends of the elongated UV radiator 2 are very preferably dimensioned to be continuously smaller, in particular without local maxima towards the suction air source of the exhaust air duct 12 .
  • the opening areas of the elongated holes assigned to the ends of the elongated UV emitter 2 are dimensioned differently from one another, with the opening area of at least one elongated hole of the end of the UV emitter 2 facing the suction air source of the exhaust air duct 12 preferably being dimensioned smaller than an opening area of at least one elongated hole the end of the UV radiator 2 facing away from the suction air source of the exhaust air duct 12.
  • the slots facing the respective ends of the UV radiator 2 can also include two, three or four slots.
  • the air flows resulting from operation with activated exhaust air cooling and deactivated blast air system 13 are shown here in principle or schematically.
  • cooling takes place primarily on the upper side of the UV radiator 2, while the lower side facing the processing material is cooled less than the upper side.
  • the operating mode for example, a warm-up can take place.
  • This operating mode can also be provided during operation, for example when the UV module 1 is operated at low power, especially when the glass tube temperature is low, for example with a lamp power of less than 140 to 120 W/cm.
  • the figure 5 shows the cross section of UV module 1 with activated blast air system 13, here in particular the attachable blast air system 13.
  • One or more fans here in particular axial fans 14, generate an air flow in air ducts 15 to the air inlet opening 10 facing the processing material or printing substrate.
  • At least approximately orthogonally to the ambient air flow 11 flowing in through the air inlet opening 10 it preferably passes through on both sides of the air inlet opening 10 Blown air openings 16 each have a blown air jet 17 generated.
  • the blown air jets 17 can each be formed by individual blown air openings 16 or by continuous slot nozzles, which extend, for example, over the length of the radiation source, in particular at least between electrodes 19 of a UV emitter 2 .
  • the gap formed by the blast air openings 16 can also be designed to be adjustable, so that, for example, a setting for performance classes and/or an adaptation to installation spaces or machines can be carried out.
  • a gap of 1 mm to 10 mm, particularly preferably of 2 mm to 6 mm and very particularly preferably of at least approximately 4 mm, opened by the blown air openings 16, is preferably set.
  • the blown air jets 17 generated by the blown air system 13 are in particular aligned towards one another in one plane in such a way that they influence, in particular narrow or constrict, the ambient air flow 11 flowing into the housing profile 8 .
  • the blown air jets 17 are preferably guided towards one another in one plane in such a way that they would preferably meet in the middle of the air inlet opening 10 , for example exactly below the UV radiator 2 .
  • the ambient air flow 11 is preferably influenced in such a way that the ambient air flow 11 cools the underside of the UV radiator 2 facing the processing material or printing material with increased intensity.
  • the blast air system 13 generates in particular a cross flow to the flow of ambient air 11 .
  • the 6 shows a UV module 1 with an alternative blown air system 13 that can also be attached, for example.
  • the blown air system 13 also has one or more fans, in particular axial fans 14, which generate an air flow flowing in air ducts 15 to the air inlet opening 10 facing the substrate or printing material.
  • the air blast system 13 has air blast openings 16 here, which However, do not blow directly on the UV radiator 2, but rather constrict or constrict the inflowing ambient air flow 11 below the UV radiator 2 or before it reaches the UV radiator 2. Since the air ducts 15 or blown air openings 16 can sit at least partially in the beam path of the UV radiator 2, they can also be made of a radiation-transmissive material.
  • the 7 shows a UV module 1 with a longitudinally extending UV radiator 2 and associated alternative blast air system 13.
  • the blast air system 13 has at least one compressed air connection 18, air ducts 15 and one or more blast air openings 16.
  • each air duct 15 extending across the format width transversely to the conveying direction of the processing material is assigned at least one compressed air connection 18, which applies a higher pressure than the ambient pressure to the respective air duct 15.
  • the overpressure can develop over the format width and exit via the blast air openings 16 as a blast air jet 17.
  • the 8 shows the cross section of the UV module 1 according to section AA of the previous figure with the alternative blast air system 13.
  • the compressed air supplied via the respective compressed air connection 18 is distributed over the respective air duct 15 and exits via the blast air openings 16 in the area of the air inlet opening 10 of the UV -module 1 off.
  • the blast air jets 17 can each be generated by individual blast air openings 16 or by continuous slot nozzles, which extend, for example, over the width of the processing material or printing material.
  • the blown air jets 17 are in particular aligned towards one another in a plane in such a way that they influence, in particular narrow or constrict, the ambient air flow 11 flowing into the housing profile 8 .
  • the influencing of the ambient air flow 11 preferably takes place analogously in such a way that the ambient air flow 11 cools the underside of the UV radiator 2 facing the processing material or printing material with increased intensity.
  • the 9 shows an elongate UV emitter 2 designed as a mercury vapor lamp, for example, with a cooling system or blast air system 13 acting exclusively between electrodes 19.
  • the UV emitter 2 designed as a medium-pressure mercury vapor lamp, for example, has the two ends arranged in a glass body 20 that are contacted or connected via a pin 21 .
  • the electrodes 19 can be controlled, for example, by an integrated or external pilot control device.
  • Each of the two spaced apart electrodes 19 lies at least partially in a plane E1, E2 which the elongated UV radiator 2, for example the mercury vapor lamp, intersects as an idealized common normal (as an orthogonal vector).
  • the planes E1, E2 are to be understood as idealized parallel planes spaced apart from one another in space, with the surfaces of the electrodes 19 at least touching the planes E1, E2.
  • a cooling area B of the cooling system or blast air system 13 is located in particular exclusively between the mutually facing electrode surfaces spanning the planes E1, E2.
  • the cooling area B of the cooling system or blast air system 13 with a maximum cooling capacity is preferably formed or limited here by the two levels E1, E2.
  • the cooling system or blown air system 13 of the radiation source has a maximum cooling capacity here exclusively in a cooling area B between the planes E1, E2 formed by the electrodes 19.
  • a constant cooling output is preferably generated over the entire cooling area B, with the cooling area B particularly preferably extending completely between the mutually facing surfaces of the electrodes 19 .
  • the maximum cooling capacity in cooling area B can be controlled or regulated according to the desired requirement in terms of intensity or effect. Adjacent to the cooling area B, in particular outside of the planes E1, E2, the cooling capacity of the cooling system or the blown air system 13 is reduced compared to the maximum cooling capacity or is preferably zero.
  • the glass body 20 has a larger diameter compared to the edge areas.
  • the glass body 20 enclosing the electrodes 19 tapers, with the tapered ends of the glass body 20 carrying in particular the pins 21 for making electrical contact with the electrodes 19.
  • the electrodes 19 are therefore preferably physically largely outside the cooling area B of the cooling system or blast air system 13.
  • This embodiment is particularly preferably used in medium-format machines, such as sheet-fed printing presses.
  • Medium format machines for example, can process processing material with a width of at least approximately 1 m.
  • the 10 shows an alternative elongated UV radiator 2, which is particularly suitable for large-format machines.
  • Large-format machines such as sheet-fed presses, can, for example, process processing material with a width of more than 1 m, for example approximately 1.4 m or 1.6 m or even more.
  • the UV radiator 2 is characterized in that the planes E1, E2 intersect the tapering areas of the glass body 20. The maximum diameter of the glass body 20 is thus only reached within the cooling area B delimited by the planes E1, E2. In particular when the shutters 9 are closed, this prevents the ambient air then flowing in from the side from cooling the electrodes 19 too much.
  • the 11 shows an alternative embodiment of a UV radiator 2.
  • the glass body 20 only tapers outside of the planes E1, E2.
  • the planes E1, E2 thus intersect the glass body 20 in the area of the maximum diameter.
  • the cooling area B of the The planes E1, E2 delimiting the cooling system or blast air system 13 are also spanned here by the mutually facing surfaces of the electrodes 19 of the UV radiator 2.
  • the radiation source in particular a UV radiator 2
  • air is preferably blown in on both sides, in particular outside the radiation area of the UV module 1.
  • This air preferably meets in the middle below the UV module 1 , in particular approximately in the middle of the UV radiator 2 .
  • the underside of the UV radiator 2 is thus greatly cooled. Furthermore, the cooling becomes more turbulent overall and the upper side of the UV radiator 2 is also better cooled.
  • the additional air is preferably introduced or blown in exclusively between electrodes 19 of the UV radiator 2 or over the length of the UV module 1 . This can be done using metal sheets and/or blast air nozzles.
  • the air that is preferably introduced or blown in on both sides can be either a partial mass or also at least approximately all of the cooling air acting in the UV module 1 .
  • a proportion of 80% to 50% of the cooling air is formed by the inflowing ambient air flow 11 and a proportion of 20% to 50% of the cooling air is formed by the air introduced by the blast air system 13 .
  • a proportion of 1/3 of the air or blown air 17 additionally introduced by the blown air system 13 and a proportion of 2/3 of the inflowing ambient air flow 11 is aimed for.
  • the UV radiator 2 can be operated with a power of between approximately 80 W/cm and approximately 200 W/cm.
  • the blown air system 13 can be activated or switched on depending on the power.
  • the blown air system 13 can only be activated at a medium output, for example at approximately 120 to 140 W/cm become.
  • the blown air system 13 can be completely deactivated below a radiator output of, for example, 120 to 140 W/cm.
  • the blown air system 13 can just be activated, for example.
  • the effect of the blast air system 13 can preferably be increased with the radiator power.
  • the effect of the blast air system 13 can just start at a radiator output of 120 to 140 W/cm and can be increased up to a maximum radiator output of 200 W/cm, preferably linearly or depending on the function, so that the effect of the blast air system 13 with a radiator output of 200 W /cm is 100%.
  • the blown air can be adjusted in particular according to a characteristic map, which can have local maxima and/or minima, for example.
  • the blown air can be set as a function of a curve defined, for example, between 120 W/cm and 200 W/cm.
  • a function for operating the blast air system 13 as a function of the radiator power can be predetermined and/or modified, in particular as a function of the machine.
  • the effect of the blown air system 13 can also be set individually and/or also be controlled or regulated, for example, according to the radiator output.
  • the current radiator power can be known to a control device, in particular the machine control, or can be determined by a sensor system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (15)

  1. Machine de traitement avec un dispositif de séchage (1),
    dans laquelle le dispositif de séchage (1) présente une source de rayonnement (2) logée dans un logement (8),
    dans laquelle des obturateurs (9) sont prévus dans le logement (8) au voisinage de la source de rayonnement (2),
    dans laquelle le logement (8) présente au moins une ouverture d'entrée d'air (10) pour l'air ambiant (11), de sorte que l'air ambiant (11) circule autour de la source de rayonnement (2) après être entré dans le logement (8),
    dans laquelle le logement (8) présente une ouverture de sortie d'air (12) pour l'air d'échappement (11, 17),
    dans laquelle un système d'air soufflé (13), au moyen duquel l'air ambiant (11) s'écoulant dans l'ouverture d'entrée d'air (10) est influencé et/ou peut être influencé activement de manière espacée de la source de rayonnement (2), est associé au dispositif de séchage (1),
    et dans laquelle la source de rayonnement (2) est réalisée sous la forme d'un émetteur d'UV allongé (2) avec deux électrodes (19) espacées l'une de l'autre situées respectivement dans un plan (E1, E2), dans laquelle l'émetteur d'UV allongé (2) est disposé en tant que normale aux plans (E1, E2),
    caractérisée en ce
    que le système d'air soufflé (13) produit des écoulements d'air (17) exclusivement dans une zone (B) qui se situe entre les plans (E1, E2) ou est délimitée par les plans (E1, E2).
  2. Machine de traitement selon la revendication 1, dans laquelle le système d'air soufflé (13) présente au moins une ouverture d'écoulement d'air (16), qui expulse un écoulement d'air (17) au moins approximativement perpendiculairement à la direction d'écoulement de l'air ambiant (11) s'écoulant dans l'ouverture d'entrée d'air (10).
  3. Machine de traitement selon la revendication 1 ou 2, dans laquelle le système d'air soufflé (13) présente au moins deux ouvertures d'écoulement d'air (16) opposées disposées au voisinage de l'ouverture d'entrée d'air (10).
  4. Machine de traitement selon la revendication 1, 2 ou 3, dans laquelle le système d'air soufflé (13) présente une ou plusieurs ouvertures d'écoulement d'air (16) disposées à l'extérieur de l'ouverture d'entrée d'air (10).
  5. Machine de traitement selon la revendication 1, 2, 3 ou 4, dans laquelle le système d'air soufflé (13) présente un raccordement d'air comprimé (18) et/ou au moins un producteur d'air (14), des canaux de guidage d'air (15) et plusieurs ouvertures d'écoulement d'air (16).
  6. Machine de traitement selon la revendication 1, 2, 3, 4 ou 5, dans laquelle l'ouverture de sortie d'air (12) est formée dans le logement (8) par un canal d'air d'échappement (12) relié à une source d'air aspiré, présentant un ou plusieurs passages vers l'espace entourant la source de rayonnement (2).
  7. Machine de traitement selon la revendication 1, 2, 3, 4, 5 ou 6, dans laquelle le dispositif de séchage comprend un module d'UV (1), lequel peut être disposé dans une sortie, dans une tour de séchage et/ou sous la forme d'un sécheur intermédiaire dans une machine à imprimer et/ou lequel est conçu de manière à pouvoir être inséré dans des slots.
  8. Machine de traitement selon la revendication 1, 2, 3, 4, 5, 6 ou 7, dans laquelle le système d'air soufflé (13) est réalisé sous la forme d'un module rapporté à poser sur un module d'UV (1) ou sous la forme d'un module additionnel pour un module d'UV (1).
  9. Machine de traitement selon la revendication 1, 2, 3, 4, 5, 6, 7 ou 8, dans laquelle le système d'air soufflé (13) présente des ouvertures d'air soufflé (16) avec une fente d'ouverture réglable.
  10. Machine de traitement selon la revendication 1, 2, 3, 4, 5, 6, 7, 8 ou 9, dans laquelle le système d'air soufflé (13) peut être commandé par un appareil de commande en fonction de la puissance d'émission actuelle de la source de rayonnement (2) ou peut être régulé par un appareil de commande en fonction de la puissance d'émission actuelle de la source de rayonnement (2) déterminée par un système de capteur.
  11. Procédé pour faire fonctionner le dispositif de séchage (1) de la machine de traitement selon la revendication 1,
    dans lequel le dispositif de séchage (1) présente une source de rayonnement (2) s'étendant dans un logement (8),
    dans lequel la source de rayonnement (2) coopère avec des obturateurs (9),
    dans lequel le logement (8) présente au moins une ouverture d'entrée d'air (10) pour l'air ambiant (11), de sorte que l'air ambiant (11) circule autour de la source de rayonnement (2) après être entré dans le logement (8),
    dans lequel le logement (8) présente une ouverture de sortie d'air (12) pour l'air d'échappement (11, 17) circulant autour de la source de rayonnement (2),
    dans lequel un système d'air soufflé (13) associé au dispositif de séchage (1) influence ou dévie activement l'air ambiant (11) s'écoulant dans l'ouverture d'entrée d'air (10) encore avant d'avoir atteint la source de rayonnement (2),
    caractérisé en ce
    que le système d'air soufflé (13) est allumé et/ou éteint en fonction de la puissance de la source de rayonnement (2).
  12. Procédé selon la revendication 11, dans lequel un écoulement d'air de manière dirigée ou l'air soufflé (17), lequel dans une zone (B) réduit ou restreint l'air ambiant (11) s'écoulant dans le logement (8) à travers l'ouverture d'entrée d'air (10), est expulsé par le système d'air soufflé (13).
  13. Procédé selon la revendication 11 ou 12, dans lequel un écoulement d'air de manière dirigée ou l'air soufflé (17), lequel forme conjointement avec l'air ambiant (11) entrant en s'écoulant l'air de refroidissement et ensuite l'air d'échappement, est expulsé par le système d'air soufflé (13), dans lequel le pourcentage du débit volumétrique d'air introduit par le système d'air soufflé (13) est compris entre 20 % et 50 % du débit volumétrique d'air de refroidissement commun ou atteint au moins approximativement 33 % du débit volumétrique d'air de refroidissement commun.
  14. Procédé selon la revendication 11, 12 ou 13, dans lequel le système d'air soufflé (13) est allumé lorsqu'une puissance d'émission d'au moins approximativement 120 à 140 W/cm est atteinte et/ou éteint lorsqu'une puissance d'émission chute au-dessous d'au moins approximativement 120 à 140 W/cm.
  15. Procédé selon la revendication 11, 12, 13 ou 14, dans lequel le système d'air soufflé (13) fonctionne de telle sorte que l'action du système d'air soufflé (13) augmente linéairement ou selon la fonction jusqu'à la puissance maximale en fonction de la puissance d'émission et/ou dans lequel le système d'air soufflé (13) présente pour une puissance d'émission d'au moins approximativement 200 W/cm une action de 100 %.
EP19719223.0A 2018-04-20 2019-04-16 Machine de traitement dotée d'un séchoir à rayonnement et procédé destiné au fonctionnement Active EP3781404B1 (fr)

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EP22185084.5A EP4098447B1 (fr) 2018-04-20 2019-04-16 Machine d'usinage dotée d'un dispositif de séchage et procédé permettant de faire fonctionner un dispositif de séchage

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DE102018206154.8A DE102018206154B4 (de) 2018-04-20 2018-04-20 Trocknungsvorrichtung für eine bedruckstoffverarbeitende Maschine und Verfahren zum Betreiben einer Trocknungsvorrichtung
PCT/EP2019/059858 WO2019201960A1 (fr) 2018-04-20 2019-04-16 Machine de traitement équipée d'un sécheur à rayons et procédé de fonctionnement de ce sécheur

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EP22185084.5A Division EP4098447B1 (fr) 2018-04-20 2019-04-16 Machine d'usinage dotée d'un dispositif de séchage et procédé permettant de faire fonctionner un dispositif de séchage
EP22185084.5A Division-Into EP4098447B1 (fr) 2018-04-20 2019-04-16 Machine d'usinage dotée d'un dispositif de séchage et procédé permettant de faire fonctionner un dispositif de séchage

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EP19719223.0A Active EP3781404B1 (fr) 2018-04-20 2019-04-16 Machine de traitement dotée d'un séchoir à rayonnement et procédé destiné au fonctionnement

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EP (2) EP4098447B1 (fr)
JP (1) JP6931133B2 (fr)
CN (1) CN112105505B (fr)
DE (1) DE102018206154B4 (fr)
ES (2) ES2945810T3 (fr)
PL (2) PL3781404T3 (fr)
WO (1) WO2019201960A1 (fr)

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CN216631458U (zh) * 2021-11-05 2022-05-31 江苏时代新能源科技有限公司 风嘴及涂布机

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ES2945810T3 (es) 2023-07-07
JP2021509465A (ja) 2021-03-25
EP4098447B1 (fr) 2023-06-28
DE102018206154A1 (de) 2019-10-24
PL3781404T3 (pl) 2023-08-21
ES2951178T3 (es) 2023-10-18
EP4098447A1 (fr) 2022-12-07
EP3781404A1 (fr) 2021-02-24
JP6931133B2 (ja) 2021-09-01
US11046070B2 (en) 2021-06-29
CN112105505B (zh) 2021-07-20
DE102018206154B4 (de) 2021-10-28
PL4098447T3 (pl) 2023-09-11
WO2019201960A1 (fr) 2019-10-24
US20210001621A1 (en) 2021-01-07

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