EP1555122B1 - Procédé et dispositif pour imprimer du matériau plat - Google Patents

Procédé et dispositif pour imprimer du matériau plat Download PDF

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Publication number
EP1555122B1
EP1555122B1 EP20040005737 EP04005737A EP1555122B1 EP 1555122 B1 EP1555122 B1 EP 1555122B1 EP 20040005737 EP20040005737 EP 20040005737 EP 04005737 A EP04005737 A EP 04005737A EP 1555122 B1 EP1555122 B1 EP 1555122B1
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EP
European Patent Office
Prior art keywords
cooling
air
planar material
station
cooling chamber
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.)
Expired - Lifetime
Application number
EP20040005737
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German (de)
English (en)
Other versions
EP1555122A1 (fr
Inventor
Ronald Streich
Reto Huber
Hansruedi Nef
Asmir Semanic
Heinrich Abbrederis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uviterno AG
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Uviterno AG
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Publication date
Application filed by Uviterno AG filed Critical Uviterno AG
Publication of EP1555122A1 publication Critical patent/EP1555122A1/fr
Application granted granted Critical
Publication of EP1555122B1 publication Critical patent/EP1555122B1/fr
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Classifications

    • 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
    • B41F23/0436—Drying webs using a combination of radiation, conduction or convection

Definitions

  • the invention relates to a method according to the preamble of claim 1, and an apparatus for performing this method with the preamble features of claim. 6
  • the material For printing on flat material, such as textiles, paper, but especially of labels, the material must generally be dried after printing. On some occasions, this is done with IR, but preferably with UV radiation, namely the latter when, by means of the UV radiation, a plastic carrier or binder for the printing ink is to be cured or polymerized. In any case, a non-negligible proportion of IR or heat radiation is present. However, the finer the sheet is, especially if it is formed by heat-sensitive plastic or other heat-sensitive substances, the more important is a cooling of the material in order to avoid overheating of the printed sheet.
  • Known cooling systems as from the DE-A-101 50 041 known, use cooling plates over which the sheet is guided, wherein the cooling plates are cooled by means of a heat exchanger system.
  • the heat transfer is quite poor. Although it could be improved by the flat material is pressed under vacuum to the cooling plate, for example by means of vacuum, but increases undesirably the friction, the abrasion, the risk of scratching the substrate back and the generation of static electricity.
  • the US-A-5,699,625 describes a system for drying liquid droplets on a synthetic resin film, wherein a cooling zone is provided following a heating zone.
  • the air circulating around the film in both zones in the process removes the liquid.
  • the disadvantage is that in case of short-term disruption of the transport of the film, a local overheating takes place.
  • the invention is based on the recognition that, in particular in the case of a support of a printing layer, it does not depend on a heat treatment of the support material, but above all on the layer applied thereto, which is to be dried.
  • the solution of this object is achieved according to the invention by the characterizing features of claim 1. Because, namely, that the cooling of all sides of the sheet material by means of air at least partially before drying, even a short-term transport disturbance the flat material in the zone thermal treatment does not hurt while the applied layer continues to be treated effectively, ie z. B. is dried.
  • the flat material is preferably conveyed through a chamber cooled by the cooling air.
  • the cooling can be done per se in the context of the invention by various means; In the case of printed products, the use of a liquid coolant will generally not be recommended, but even with a gaseous coolant, this can be done by sucking the coolant over the flat material. However, it is preferred if it is cooled with blown air.
  • the cooling gas will preferably be air (instead of another coolant).
  • the cooling takes place at least partially already before drying. This is surprising in itself, but the point is that the sheet is thus preserved from any thermal damage, whereas during the drying process, only the ink is at most exposed to a heat load, especially when the drying is carried out by means of UV radiation.
  • UV-reactive paints and other coatings can also be dried by means of the process according to the invention.
  • the cooling air at least partially to a value below 5 ° C, in particular by 0 ° C ⁇ 2 ° C, preferably below 0 ° C, cooled.
  • the cooling can preferably take place by means of a vortex cooler with which particularly low temperatures, for example within the abovementioned range, can be achieved.
  • Vortex coolers are for example from the WO 02/044631 , of the GB 2,385,115 or the US-A-6,401,463 known and have many advantages, such as the prevention of refrigerants on.
  • the present invention also relates to an apparatus for carrying out the method according to the invention, which has the features of claim 6.
  • Fig. 1 runs from a substantially endless or strip-shaped sheet 15 from a supply roll 16 from.
  • This strip-shaped flat material is to be treated on one side, and for this purpose along its path a treatment device B is provided, which could be formed as desired, but in the present embodiment, a coating device for applying a plastic layer and / or an adhesive layer is formed. If here of "and / or" the speech is, that's why in Fig. 1 Although only a single coating roller 11 'is shown, but if necessary, several of them, for example, each for a different layer, could be provided.
  • a cooling station C is provided with a cooling chamber 3, in which a coolant, preferably in a cooling unit 5 'cooled and supplied by a fan 9 air, the Flat material surrounds from all sides and so a particularly good heat or cold transition takes place on the flat material 15.
  • the cooling station C can eg with Freon or another, preferably CFC-free, coolant operated and is therefore known per se.
  • curable or to be dried adhesive layers often occur in blister packs, these adhesive layers are then cured by UV radiation usually; It is therefore certainly within the scope of the invention also provided, if necessary, before the drying station T an applicator for applying the adhesive to be glued (transparent envelope, applied to a carrier, usually made of cardboard) to order.
  • the cooling chamber 3 is preferably so relative to the adjacent components (11 ', 14', T in Fig. 1 ; 14, 28, 32, 33 in Fig. 2 ) is arranged and is formed so that in her the flat material 15 is exposed from all sides of the cooling air.
  • the slots 1, 2 thus preferably do not touch the flat material 15, but can be used as input and Ausfahr Kunststoffblenden. In itself, it would be possible to provide the cooling only after the drying station T, but a pre-cooling has proven in practice to be more effective. In any case, at the end the finished treated or coated and dried flat material 15 is wound up on a take-up roll 25.
  • FIG. 2 emanates from a printing unit, as for example from the GB-A-2,198,265 has become known whose details are removable there and are discussed here only in broad terms.
  • the reference numerals from this document have been adopted and are also apparent from the attached list of reference numerals, which is hereby incorporated by reference.
  • the flat material is in turn wound on the supply roll 16 and is unwound therefrom by means of the motor 17, for example a stepper motor, in order subsequently to travel through a conventional loop 20 in order to keep the flat material 15 free of stress.
  • this section is referred to as a stocking section V.
  • Supply section V closes a correction section K with the known, in opposite directions of rotation drivable rollers 23, 24th
  • a printing station D (as a treatment station), per se any training. It should be mentioned again that while the printing of the flat material is a preferred application in the context of the invention, other treatments such as coating (for example with an adhesive) or the like may be used. are conceivable.
  • the flat material 15 is a very thin and / or very heat-sensitive material, then a heat treatment, which in itself is intended only for the applied printing layer, can cause damage to the flat substrate, which does not have to be expressed visually, but rather possibly lead to premature embrittlement, to peel off a pad or the like, such as to delay due to thermal expansion or to undesirable change in the modulus of elasticity.
  • At least one cooling station C1 and / or C2 is provided.
  • the sheet often even during the pressure to temper, and it is also known to use blown air.
  • this cooling process has always been carried out only on one side of the sheet 15, and this is not sufficient to protect very thin and / or very heat-sensitive material from heat damage.
  • the cooling is now carried out so that the respective cooling zone C1 or C2 is arranged such that the continuous flat material 15 - as possible without further contact in the region of the cooling chambers 3 - held by the adjacent components 14, 28, 32, 33, so is that a cooling medium, in particular a gaseous cooling medium, such as air, from both sides of the flat material 15 can cool this.
  • a cooling medium in particular a gaseous cooling medium, such as air
  • the counting roller 14 of the printing station D could also be used to hold the flat material 15, which subsequently runs, for example, over a roller similar to the loop roller 28 as a holding device.
  • the sheet 15 could then, for example are flushed by nozzles with cold air, which blow on both sides of the sheet 15 or suck air or other cooling gas over the surface of the sheet 15 such that a cooling flow along this surface results.
  • cooling takes place in a cooling chamber 3, because then a single supply line 4 or 4 'may be sufficient and, moreover, the losses in cooling capacity can be kept low.
  • This cooling chamber 3 will preferably be isolated by means of insulating material, not shown.
  • the sheet is less sensitive to heat, it may be sufficient to provide a cooling station C2 following the drying station T.
  • a cooling station C1 prior to the heat treatment in the station T so as to ensure that the heat acts only superficially on the print layer whereas the flat substrate 15 is sufficiently cooled to avoid its damage.
  • each individual station C1 or C2 can be assigned a separate cooling unit. While at the cooling station C1, a vortex tube 5 is indicated as a cooling unit, the air is supplied via a line 6, and the cooling air discharges into the supply line 4, the downstream cooling station with a coolant such as freon or the like. although less preferred. Therefore, if both stations C1 and C2 each have their own refrigeration unit, the use of a vortex cooler with the tube 5 is preferred in each case.
  • a single cooling unit 5 is provided, the given and, if desired, supplies both cooling stations C1 and C2.
  • a connecting line 7 per a switching flap or another valve 8 or 8 '.
  • the valve 8 can be designed so that it selectively releases the connection only to the connected to the supply line 4 cooling chamber, or blocks against this cooling chamber and only the connecting line for supply via the supply line 4 'releases, or optionally cooling air to the two cooling chambers. 3 the stations C1 and C2 passes.
  • a fan 9 is connected, which receives ambient air and presses in the supply line 4.
  • a slider 10 or another valve provided to adjust the mixing ratio of ambient air from the fan 9 to the air from the vortex tube 5 can.
  • the slider 10 can be adjusted by a control circuit (not shown) in such a way that in each case air at a specific cooling temperature reaches the cooling chamber 3.
  • the cooling temperature will generally (and preferably) be below 5 ° C, especially around 0 ° C ⁇ 2 ° C, preferably below 0 ° C, but of course - depending on the requirements - deviations are possible. Nevertheless, it should be emphasized that the use of a vortex cooler in a hassle-free manner (since operation takes place without one of the problematic coolants) makes it possible to achieve such low cooling temperatures without much effort.
  • the mixing of the cooling air can be made in various ways. For example, it would be conceivable to combine the outputs of the vortex tube 5 and the fan 9 in the manner of an injector with one another, which could even increase the efficiency of the cooling.
  • the strip-shaped flat material 15 After the drying station or after the cooling station C2, the strip-shaped flat material 15 reaches in a known manner a winding station, as described in the already mentioned GB-A-, to which again expressly referred.
  • Fig. 3 shows a particularly simple construction according to the invention. Again, only one cooling station C T is shown, although in principle several would be possible, as has been explained with reference to the previous embodiments. Parts of the same function have the same reference numerals as in the previous figures, parts of similar function the same reference numerals, but with an addition.
  • Fig. 1 essentially consists in that the cooling station C T and the cooling chamber 3 is integrated into the drying station T or assembled with this. This may seem surprising at first glance, but it becomes immediately understandable considering that it accomplishes two tasks simultaneously: it can be done with a single cooling device C T or a single cooling source 5 '(whatever it is). at the same time the cooling of the heat source (UV lamp 42) take place. Normally, this heat source 42 is associated with its own cooling arrangement, wherein the supply of cooling air is optionally from above (based on Fig. 3 ) he follows. This cooling arrangement can now be saved in an advantageous manner, because the cooling device C T also provides for the cooling of the heat source 42. This simplifies the design and increases its efficiency.
  • the supply of the cooling medium generally cooling air, possibly also another cooling gas
  • the sheet 15 receives air of lower temperature and is cooled more effectively, before this air (with little heating) of the heat source 42 is supplied.
  • the air preferably flows in "countercurrent" to the downward UV radiation.
  • a cover plate for example in the form of a quartz glass plate to protect the tube is provided, so that no warm, ozone-containing cooling air directed to the substrate becomes.
  • the cooling chamber 3 may be formed in the context of the invention substantially as a prismatic hollow body; but it would be quite conceivable internals for flow guidance, for example, to swirl the cooling air to provide to wash around the sheet with certainty from all sides. Moreover, it is probably clear that the top of the hand various features described in this invention can be combined in any way with each other as well as with features of the prior art.
  • the cooling chamber 3 may be formed in various ways. In itself, it would be possible to make their interior closed and sealed in the manner of a freezer and accordingly provide for cooling an absorber or compressor unit (heat pump). However, preference is given to cooling with flowing gas, in particular air.
  • the supply via the pipe 4 ( Fig. 2 ) or from the unit 5 'shown. But if a flow is to take place, then of course also a discharge of the supplied air must be provided. This can take place (preferably) via at least one of the air panels 1, 2, in particular at least over the air panel 2 facing the receiving coil 25, which in such a case are to be formed unsealed or open. In this case, even after the cooling chamber results in a flowing around the sheet 15 cooling flow, which is preferred.
  • Another possibility would be to provide an exhaust duct approximately at the top (with reference to the drawings) of the cooling chamber 3. Assuming, however, that the exhaust still contains cooling energy, i. a relatively low (based on the room temperature) temperature, then it is also conceivable to supply the exhaust air in a cycle back to the cooling unit 5 and 5 '.
  • the latter possibility can be particularly advantageous if, for example, instead of air, another cooling medium, such as a special gas, is used.
  • the cooling chamber 3 is free of guides or holding devices, although the invention is not limited thereto.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Solid Materials (AREA)

Claims (10)

  1. Procédé pour traiter du matériau plat (15), particulièrement en forme de bande, dans lequel le matériau plat (15), par exemple après avoir appliqué une couche, comme une couche d'impression, est thermiquement traité, particulièrement traité à chaud, par exemple par un rayonnement U.V., par exemple étant séché, dans lequel le matériau plat (15) est aussi refroidi à l'aide de l'aire tout en le maintenant sensiblement accessible à l'aire de tous les côtés, caractérisé en ce, que le refroidissement (C1 ; CT) de tous les côtés du matériau plat (15) à l'aide de l'air est réalisé au moins en partie déjà avant du séchage (T).
  2. Procédé selon la revendication 1, caractérisé en ce, que le matériau plat (15) est transporté à travers une chambre (3) refroidie par air de refroidissement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce, que l'on effectue un refroidissement du matériau plat (15) par air soufflé.
  4. Procédé selon une quelconque des revendications précédentes, caractérisé en ce, que l'air de refroidissement est refroidi au moins en partie à un valeur au dessous de 5°C, particulièrement autour de 0°C ± 2°C, de préférence au-dessous de 0°C.
  5. Procédé selon une quelconque des revendications précédentes, caractérisé en ce, que l'air de refroidissement est refroidi par un refroidisseur de type Vortex (5).
  6. Dispositif pour l'exécution du procédé selon une quelconque des revendications précédentes, comprenant une station de traitement, comme une station d'impression (D), pour un matériau plat (15), particulièrement en forme de bande, qui a deux côtés, une station de séchage (T), qui en particulier comprend une unité de rayonnement U.V. (42), et au moins une station de refroidissement à l'air (C ; C1 ou C2), à quelle un dispositif de convoyage d'air (5, 9) est associé et qui est relié avec une chambre de refroidissement (3), ladite chambre de refroidissement (3) étant disposée et formée pour y passer le matériau plat (15) à travers d'elle tout en contactant les deux côtés du matériau plat (15) avec l'air de refroidissement, caractérisé en ce, que la station de refroidissement à l'air (C1 ou C2) est disposée au moins en partie déjà devant de la station de séchage (T) de manière, que le refroidissement (C1 ; CT) de tous les côtés du matériau plat (15) est effectué au moins en partie avant le séchage (T).
  7. Dispositif selon la revendication 6, caractérisé en ce, qu'au moins une partie de l'air de refroidissement peut être refroidi à l'aide d'un refroidisseur de type Vortex (5) en communication avec la chambre de refroidissement (3).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce, qu'une zone de mélange est placée en amont de la chambre de refroidissement (3), à laquelle de l'air des températures différentes peut être admis à travers des conduits différents (4-6).
  9. Dispositif selon une quelconque des revendications 6 à 8, caractérisé en ce, que le dispositif de convoyage d'air (9) est placé en amont de la chambre de refroidissement (3) d'une manière, que la chambre de refroidissement (3) obtient de l'air sous pression.
  10. Dispositif selon une quelconque des revendications 6 à 9, caractérisé en ce, que la chambre de refroidissement (3) est en communication avec la station de séchage (T) d'une manière, que non seulement le matériau plat (15), mais encore la source respective de chaleur (42) peuvent être refroidis à l'aide du fluide de refroidissement passant à travers la chambre de refroidissement (3), et que de préférence l'admission (4 ; 5') du fluide de refroidissement est prévue au côté du matériau plat (15) passant à travers la chambre de refroidissement (3), étant ainsi prévu devant la source de chaleur (42) de la station de séchage (T).
EP20040005737 2004-01-16 2004-03-11 Procédé et dispositif pour imprimer du matériau plat Expired - Lifetime EP1555122B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH562004 2004-01-16
CH562004 2004-01-16

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EP1555122A1 EP1555122A1 (fr) 2005-07-20
EP1555122B1 true EP1555122B1 (fr) 2011-04-27

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DE (1) DE502004012438D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105398208A (zh) * 2015-12-17 2016-03-16 东莞市秦智工业设计有限公司 一种不干胶标签的印刷系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH576869A5 (fr) * 1973-05-11 1976-06-30 Mohn Reinhard Mohndruck Ohg
DE3241117A1 (de) * 1982-11-06 1984-05-10 Automation für grafische Technik AG, 4005 Meerbusch Verfahren zur abkuehlung einer in einer druckmaschine bedruckten materialbahn sowie vorrichtung zur durchfuehrung dieses verfahrens
ATE186857T1 (de) * 1995-05-04 1999-12-15 Noelle Gmbh Vorrichtung zum härten einer schicht auf einem substrat
JP3575892B2 (ja) 1995-10-19 2004-10-13 株式会社ユポ・コーポレーション テンターオーブンにおける雨滴排出装置
US6401463B1 (en) 2000-11-29 2002-06-11 Marconi Communications, Inc. Cooling and heating system for an equipment enclosure using a vortex tube
DE10123489B4 (de) 2001-05-15 2009-04-02 Goss Contiweb B.V. Vorrichtung zum Kühlen einer Materialbahn
DE10150041B4 (de) 2001-10-10 2006-06-01 Platsch Gmbh & Co.Kg Austrag-Kühleinrichtung für eine Druckmaschine
DE10152593A1 (de) 2001-10-24 2003-05-08 Koenig & Bauer Ag Einrichtung zur Bedruckstoff- und Druckwerkskühlung mittels gekühlter Blasluft an Bogenrotationsdruckmaschinen
US6688225B2 (en) 2001-10-30 2004-02-10 Graymills Corporation System for cooling ink and other liquids on a printing press
DE10158051A1 (de) 2001-11-27 2003-06-05 Roland Man Druckmasch Verfahren und Vorrichtung zum Abkühlen eines Bedruckstoffes in einer Rotationsdruckmaschine
GB2385115B (en) 2001-11-27 2007-10-10 Molinar Ltd Liquid Dispensing Nozzle

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EP1555122A1 (fr) 2005-07-20
DE502004012438D1 (de) 2011-06-09

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