EP1306212B1 - Dispositif pour refroidir les produits imprimés avec de l'air refroidi dans des machines pour imprimer des feuilles rotatives - Google Patents

Dispositif pour refroidir les produits imprimés avec de l'air refroidi dans des machines pour imprimer des feuilles rotatives Download PDF

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Publication number
EP1306212B1
EP1306212B1 EP02022662A EP02022662A EP1306212B1 EP 1306212 B1 EP1306212 B1 EP 1306212B1 EP 02022662 A EP02022662 A EP 02022662A EP 02022662 A EP02022662 A EP 02022662A EP 1306212 B1 EP1306212 B1 EP 1306212B1
Authority
EP
European Patent Office
Prior art keywords
cooling
printing
sheet
devices
blown 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.)
Expired - Lifetime
Application number
EP02022662A
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German (de)
English (en)
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EP1306212A1 (fr
Inventor
Michael Koch
Tilo Steinborn
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1306212A1 publication Critical patent/EP1306212A1/fr
Application granted granted Critical
Publication of EP1306212B1 publication Critical patent/EP1306212B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41F23/0483—Drying combined with cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes

Definitions

  • the invention relates to a device for printing substrate and printing unit cooling means of cooled blown air on sheet-fed rotary printing machines according to the preamble of the first claim. It is generally known to arrange driers at or between the printing units and in the display area in order to support the drying and curing process of printing inks and in particular paints. In this case, primary (infrared dryer) or secondary (UV dryer) large amounts of heat are delivered to the substrate and adjacent to the dryer printing press assemblies.
  • the amount of heat given off by convection or radiation and not used for the drying process is regarded as a disturbance variable for the printing process and the sheet deposition (impairment of the printing in the subsequent printing unit, excessive stacking temperature, damage to thermally sensitive substrates) and also impairs the functioning of adjacent machine elements, if these heat inadmissible.
  • all materials in the dryer area must be extremely heat-resistant (cables, hoses, sensors, pneumatic cylinders, etc.).
  • a suction device for discharging heated air from the dryer area in the sheet delivery is known, but does not cool the heated by radiation sheet guide surfaces.
  • baffles are described on the underside coolant channels are arranged (eg DE 19810387 C1 ). However, their cooling effect is limited only to the baffle, a cooling of the adjacent machine parts or the printing material can not be achieved.
  • cooled blast air for pressure plate cooling is for example from the EP 0480230 A1 known as well as the cylinder cooling by means of blowing air from the DE 4326835 A1 .
  • the blown air cooling after the EP 0480230 A1 has a combination of fans and controlled cooler, which is provided only for the pressure plate cooling and is designed as a gap nozzle with a correspondingly low effective range.
  • the DE 4202544 A1 and DE 4326835 A1 show additional Blasluftkühlbalken with partial cooling air circuit for rubber or plate cylinder, which are not suitable for sheet guiding.
  • the said blown air cooling systems have the common disadvantages that they require additional space, which further complicate access to the machine assemblies in cleaning or furnishing actions, and they are each designed only for specific cooling tasks. In general, the remaining space along the sheet path between dryers, sheet guiding devices, washing devices or automatic register devices is also insufficient for effective cooling of both the heated machine elements and the substrates exposed to the dryers.
  • the invention is therefore based on the object to provide a device that is able to effectively cool both the substrates and the undesirable miterhitzten of the dryers machine elements with minimal space requirements.
  • the solution according to the invention uses the pneumatic sheet guiding elements present along the entire sheet path before and after the printing zone, below transfer and turning drums and in the delivery area by integration of cooling devices for the cooling air generation and supply to the printing material and the blown air for the convective cooling of the heated machine areas, so that printing material and printing press are effectively cooled along the entire sheet path.
  • Fig.1 shows a schematic representation of the sheet-guiding cylinder of two printing or coating units of a sheet-fed rotary printing machine in a row construction, between which a transfer drum 3 is located. From upstream in the sheet running direction printing unit and the downstream printing unit only the impression cylinder 2, 4 and the cooperating blanket cylinders 1, 5 are shown. Depending on the print job and machine configuration, pneumatic sheet guiding devices are arranged along the sheet path, of which the sheet guiding devices 7, 9, 10, 11 are shown by way of example.
  • a known blow box 7 which prevents the greasing of the printed sheet on the air cushion sheet 8.
  • the sheet is smoothly applied by means of a blow box 9 and depending on the substrate thickness of additional blowpipes 10.1, 10.2 to the printing cylinder 4.
  • a UV ink or a varnish is applied in the upstream printing unit, then the sheet is dried by means of an intermediate dryer 12, which is arranged between the printing zone 1, 2 and the sheet transfer area 2, 3. It is either an infrared dryer or a UV dryer. From the prior art, it is known to provide a Blasluftkühlung 11 for cooling the sheet after passing through the dryer 12.
  • the cooling device is arranged inside of blast air boxes in the suction and / or blast air flow of fans or associated with the Blas Kunststoffstrom of blowguns and formed as a cooling register with liquid-flow cooling surfaces.
  • the cooling medium may be water, cooling brine or a gas, wherein the coolant flow is controllable.
  • the cooling surfaces can serve with appropriate design at the same time as a guide surfaces for the desired Blas Kunststoff Entry on the sheet guiding device.
  • a cooling device 6.1 is arranged in the Blas Kunststoffstrom a the air cushion sheet 8 supplying blower air fan 6.2, wherein the cooling surfaces in accordance with the invention advantageously as a lamellar air guide elements.
  • Fig.1 may be formed, which distribute the coming of the fan 6.2 Blas Kunststoffstrom evenly over the sheet guide and thereby cool the air flow. If the air cushion sheet 8 acted upon by several fans 6.2 or the Blas Kunststoffkasten 7 is divided into several chambers, each with separate fans, each fan 6.2 a cooling device 6.1 be assigned modular, which also be interconnected with theirméstoffvor- and recirculation to a circuit can.
  • cooling surfaces In the case of several juxtaposed fans 6.2, it may be appropriate to arrange the cooling surfaces parallel to the sheet transport direction next to each other, wherein the outer contour of the cooling surfaces of the shape of the blow box 7 is approximated. Since the cooling surfaces in this case can extend over almost the entire inner volume of the blow box 7, thus a high cooling capacity is transferable.
  • Blowing tubes 10.1, 10.2 associated cooling devices 20 have in the Blasstrahlraum extending rows of cooling surfaces with coolant channels 21, wherein the cooling surfaces are made compact due to the space available for blowpipes usually small space and formed in their contour according to the Bogenweg.
  • the cooling surfaces are used in an advantageous development at the same time as a holder for the blowpipes 10.1, 10.2 ..
  • An arrangement of guide bars 19 in the area of action of cooling surfaces as shown by way of example for the sheet guiding device 13 according to the printing zone 1, 2, has the advantage that it is not separated by a separate cooling (such as, for example) DE 19829383 ) must be cooled.
  • extended cooling surfaces of the cooling device 13.1 can also be provided up to the curved path.
  • a sheet guiding device 15,16 according to the invention is shown in the delivery directly in the dryer zone 14, which may also be present in several modules.
  • Analogous to the blow box 7 in Fig. 1 According to the invention, there is a cooling register 15.1 in the blast air flow of a fan 15.2 acting on the blow box 16, wherein several fans 15.2 and cooling register 15.1 can also be arranged in a row at right angles to the transport direction on the blow box 16.
  • the driers 14 above the sheet path can be equipped with a suction device 22 for discharging the hot air rising from the dryers 14 and for shielding surrounding printing machine elements from the heat radiation from the driers 14.
  • the cooling air cooled in the cooling devices 6, 6, 9, 11, 11, 13, 1, 15. 1 flows through the sheet guiding devices and initially cools the guide surfaces facing the arc.
  • the air cushion generated outside the sheet guiding devices 6,9,11,13,15 cools the sheet and the drum or cylinder surface and protects the sheet so from thermal deformation or damage.
  • the cooling air flows out of the sheet guiding zone, the surrounding machine elements are convectively co-cooled as well. Due to its expansion, it cools the bow very effectively and evenly distributes the cooling air before it enters the adjacent printing units for the purpose of temperature control flows. Exposure time and cooling capacity can be increased by a factor of 4 compared to conventional air-cooled units.
  • the arrangement of the sheet guiding devices 13, 20 according to the invention can continue according to FIG Fig.2 be chosen in an advantageous manner so that they shield the cylinder surfaces from heat radiation of the dryer and thus still cause an additional, secondary cooling effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (9)

  1. Installation pour refroidir des produits imprimés et des groupes d'impression avec de l'air soufflé, refroidi dans des machines d'impression rotatives feuille à feuille équipées de séchoirs comportant des installations de guidage pneumatique de feuilles à proximité immédiate du chemin de transfert des feuilles et des installations de refroidissement de l'air de soufflage fourni,
    l'air de soufflage, refroidi est fourni par les installations de guidage de feuilles (6, 9, 10.1, 10.2, 11, 13, 15) prévues pour un guidage pneumatique de feuilles, le long du trajet de transfert des feuilles,
    installation caractérisé en ce
    - les installations de refroidissement (6.1, 6.3, 9.1, 9.3, 11.1, 11.3, 13.1, 13.3, 15.1, 15.3, 20) sont prévues dans la section d'écoulement de l'air soufflé sur ou dans les installations de guidage de feuilles (6, 9, 10.1, 10.2, 11, 13, 15),
    - les installations de refroidissement (6.1, 6.3, 9.1, 9.3, 11.1, 11.3, 13.1, 13.3, 15.1, 15.3, 20) sont réalisées sous la forme de surface de refroidissement traversées par du fluide de refroidissement, ces surfaces constituant des surfaces de guidage pour le guidage de l'air soufflé, en répartissant régulièrement la veine d'air soufflé.
  2. Installation de refroidissement de produits imprimés de groupes d'impressions selon la revendication 1,
    caractérisé en ce que
    les installations de refroidissement (6.1, 6.3, 9.1, 9.3, 11.1, 11.3, 13.1, 13.3, 15.1, 15.3, 20) sont logées dans des caissons de soufflage (7, 9, 11, 13, 16) et/ou dans des tubes de soufflage (10.1, 10.2) sous les tambours de transfert (3) et/ou au dessus des cylindres d'impression (2, 4).
  3. Installation de refroidissement de produits imprimés de groupes d'impressions selon la revendication 2,
    caractérisé en ce que
    les installations de refroidissement (15.1, 15.3) sont prévues dans la zone de sortie des installations de guidage de feuilles (15).
  4. Installation de refroidissement de produits imprimés de groupes d'impressions selon la revendication 2 ou 3,
    caractérisé par
    des installations de guidage de feuilles (11, 13) supplémentaires comportant des installations de refroidissement (11.1, 11.3, 13.1, 13.3) pour refroidir de manière plus intense, le long du trajet des feuilles.
  5. Installation de refroidissement de produits imprimés de groupes d'impressions selon l'une des revendications 1 à 4,
    caractérisé en ce que
    les surfaces de refroidissement (6.3, 9.3, 11.3, 13.3, 15.3) sont situées dans la veine d'aspiration en amont des ventilateurs (6.2, 9.2, 11.2, 13.2, 15.2) ou d'autres générateurs de pression.
  6. Installation de refroidissement de produits imprimés de groupes d'impressions selon l'une des revendications 1 à 4,
    caractérisé en ce que
    les surfaces de refroidissement (6.1, 9.1, 11.1, 13.1, 15.1, 20) sont installées dans la veine d'air soufflé en aval des ventilateurs (6.2, 9.2, 11.2, 13.2, 15.2) ou des autres générateurs de pression (10.1, 10.2).
  7. Installation de refroidissement de produits imprimés de groupes d'impressions selon l'une des revendications 1 à 4, comportant des surfaces de refroidissement selon les revendications 5 ou 6.
  8. Installation de refroidissement de produits imprimés de groupes d'impressions selon l'une des revendications 1 à 7,
    caractérisé par
    des dispositifs d'aspiration (22) favorisant le refroidissement, ces dispositifs étant installés au dessus des séchoirs (12, 14).
  9. Installation de refroidissement de produits imprimés de groupes d'impressions selon la revendication 2,
    caractérisé en ce que
    les installations de guidage de feuilles (13, 20) sont prévues entre le séchoir (12) et la zone de pression (1, 2) en amont ou en amont de la zone de pression (4, 5) située en aval, dans les directions de développement du rayonnement thermique réfléchi, dispersé des séchoirs (12) de façon que le cylindre en caoutchouc (1) installé en amont et le cylindre de pression (4) installé en aval soient protégés du rayonnement thermique développé par le séchoir.
EP02022662A 2001-10-24 2002-10-10 Dispositif pour refroidir les produits imprimés avec de l'air refroidi dans des machines pour imprimer des feuilles rotatives Expired - Lifetime EP1306212B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10152593A DE10152593A1 (de) 2001-10-24 2001-10-24 Einrichtung zur Bedruckstoff- und Druckwerkskühlung mittels gekühlter Blasluft an Bogenrotationsdruckmaschinen
DE10152593 2001-10-24

Publications (2)

Publication Number Publication Date
EP1306212A1 EP1306212A1 (fr) 2003-05-02
EP1306212B1 true EP1306212B1 (fr) 2010-05-19

Family

ID=7703634

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Application Number Title Priority Date Filing Date
EP02022662A Expired - Lifetime EP1306212B1 (fr) 2001-10-24 2002-10-10 Dispositif pour refroidir les produits imprimés avec de l'air refroidi dans des machines pour imprimer des feuilles rotatives

Country Status (3)

Country Link
US (1) US6983696B2 (fr)
EP (1) EP1306212B1 (fr)
DE (2) DE10152593A1 (fr)

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JP5089357B2 (ja) * 2006-12-11 2012-12-05 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 印刷機で印刷または塗工された枚葉紙を乾かす方法
US8118420B2 (en) 2007-12-21 2012-02-21 Palo Alto Research Center Incorporated Contactless ink leveling method and apparatus
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US8807736B1 (en) 2013-01-31 2014-08-19 Ricoh Company, Ltd. Low-temperature gas flow insertion in printing system dryers
US9605898B2 (en) 2013-03-07 2017-03-28 Ricoh Company, Ltd. Drum temperature control for a radiant dryer of a printing system
CN103342249B (zh) * 2013-07-16 2016-08-10 成都印钞有限公司 一种印刷纸张吸风展平装置
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Also Published As

Publication number Publication date
US6983696B2 (en) 2006-01-10
US20030121440A1 (en) 2003-07-03
EP1306212A1 (fr) 2003-05-02
DE50214439D1 (de) 2010-07-01
DE10152593A1 (de) 2003-05-08

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