EP0245634B1 - Dispositif pour le traitement ultérieur d'une bande continue couchée ou imprimée - Google Patents

Dispositif pour le traitement ultérieur d'une bande continue couchée ou imprimée Download PDF

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Publication number
EP0245634B1
EP0245634B1 EP87104697A EP87104697A EP0245634B1 EP 0245634 B1 EP0245634 B1 EP 0245634B1 EP 87104697 A EP87104697 A EP 87104697A EP 87104697 A EP87104697 A EP 87104697A EP 0245634 B1 EP0245634 B1 EP 0245634B1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
material web
cooling roller
cooling
web
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
EP87104697A
Other languages
German (de)
English (en)
Other versions
EP0245634A3 (en
EP0245634A2 (fr
Inventor
Wolfgang Pfizenmaier
Istvan Bulcsu
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0245634A2 publication Critical patent/EP0245634A2/fr
Publication of EP0245634A3 publication Critical patent/EP0245634A3/de
Application granted granted Critical
Publication of EP0245634B1 publication Critical patent/EP0245634B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • 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
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction

Definitions

  • the invention relates to a device for the aftertreatment of an at least one-sided coated or printed material web according to the preamble of claim 1.
  • Post-treatment of such good webs is carried out with the aim of accelerating the volatilization of the solvents contained in printing inks and drying the printing inks to such an extent that the quality of the printed image is preserved during subsequent manipulations with the good web, for example in a folder.
  • the gut web passes through a dryer in which the gut web is heated, and an adjoining vapor duct with a blower nozzle arrangement, which in the vapor duct has an air flow opposite the direction of passage of the gut web generated.
  • the material web is then guided over a cooling roller arrangement, the cooling effect of which is intended to solidify the printing ink.
  • the aim here is to reduce the concentration of the solvent in the air surrounding the material web before the material web reaches the cooling roller arrangement, on which larger amounts of solvent would otherwise condense.
  • a blowing device is also provided, the air flow of which, in the vicinity of a cooling roller, is directed toward the surface of the material web facing away from the cooling roller and essentially in the radial direction toward the cooling roller.
  • This is intended to force an intimate contact between the material web and the chill roll, in order to avoid an air gap that would otherwise occur between them, into which solvent still present can evaporate, and to cause the material temperature to drop rapidly below the evaporation point of the solvent with the aim that the small amounts of condensate still to be reabsorbed by the gut web and do not accumulate on the chill roll.
  • an air stream is blown into a gusset formed by the material web and a cooling roller with the main flow component directed against the direction of travel of the material web, and the gusset is assigned a suction device by means of which air enriched with solvent vapor through the drying process to be suctioned off in the boundary layer located above the cooling roller surface.
  • This does not prevent a post-evaporation, which is per se desirable with regard to the drying of a printed material web, after leaving a dryer.
  • the measures mentioned are aimed at preventing the formation of condensate on a free chill roll surface. This goal is less achievable with the means mentioned, the higher the speed of the gutter.
  • the invention has for its object to provide a device of the type mentioned, which is particularly suitable for high web speeds. This object is achieved with a device according to claim 1.
  • a web offset printing press can be equipped with a doctor device arranged according to the invention, even with a strong one Color coverage can be operated at web speeds over 6.5 meters per second without solvent condensates having a negative impact on the print quality.
  • no efforts are required, as set out in the aforementioned DE-OS 33 05 749, in order to displace the air gap which arises between the material web and the cooling roll and into which solvent can evaporate.
  • Fig. 1 shows a schematic overview of a device equipped with a cooling roller doctor for post-treatment of a coated or printed material web.
  • FIG. 2 shows an exemplary embodiment of a doctor blade device in a swivel position with a cooling roller doctor blade applied to the cooling roller.
  • FIG. 3 shows a traversing device for the doctor device according to FIG. 2.
  • a device for post-treatment of a coated or printed material web is shown schematically.
  • the Gutbahn 1 is preferably a paper web printed on both sides, which has passed through the printing units of a web offset printing press. The paper web is then heated in dryer 2. Such dryers can be connected to a suction device with which solvent vapors are drawn off which emerge from the heated ink layer of the printed paper web.
  • the paper web passes through a slot in a wall of the dryer adjoining the extractor duct 3 into the extractor duct.
  • blocking nozzles 4 are provided, from which hot air is blown into the dryer through the slot.
  • the paper web entering the vapor duct when hot continues to emit solvent, some of which can be drawn off via the vapor extractor 5.
  • Another part is transported on with the paper web, on which a boundary layer of solvent-containing air with a relatively high solvent concentration is formed as a result of post-evaporation of solvents from deeper layers of paint.
  • this boundary layer is partially reduced with the aid of blowing nozzles 6, with which one essentially opposes the direction of travel of the paper web directed blow air flow is directed at this.
  • a complete "breaking up" of this boundary layer does not succeed, however, so that the paper web is still surrounded by solvent vapors when it hits the first cooling roller 7.
  • An air gap is formed between the surface of the paper web that wraps around this cooling roller and the surface of the cooling roller, reinforced at higher web speeds.
  • the cited pneumatic displacement requires a powerful blower, which increases the operating costs of a printing press not insignificantly, and it causes unsustainable atomization of the printing press and its Environment with solvents.
  • the solvent condensate precipitated on the first cooling roller 7 is scraped off into a collecting container 9, from which it can be removed in a controlled manner via a discharge nozzle 10.
  • the doctored solvent is desirably lost to the further process insofar as it would otherwise be conveyed back by the rotating cooling roller into the air gap between the latter and the paper web without being doctored. This would have the consequence that a condensation-diffusion equilibrium would occur in the air gap at a higher solvent concentration in the color layer, which would counteract the evaporation of solvents from deeper color layers.
  • the run of the paper web running from the first cooling roller would therefore still have a relatively high proportion of solvent in the deeper layers of the ink layer facing the cooling roller without being doctored.
  • the doctor device with the purpose explained above is only provided on the first cooling roller.
  • its total length must be kept as short as possible. This necessitates short paths of the paper web from the dryer to the first cooling roller and, especially at higher paper web speeds, extremely short periods of time which are available to the ink for reducing its solvent content.
  • the paper web On the side of the paper web facing away from the first cooling roller 7 (FIG. 1), the paper web is cooled and evaporated on the one hand without interaction with solvent condensate deposited on the first cooling roller and on the other hand over a longer period of time until the second cooling roller 11 is reached (FIG. 1) .
  • FIG. 2 shows an exemplary embodiment of a doctor device arranged on the first cooling roll. It has a replaceable squeegee 14 screwed onto the inside of the collecting container 9 (screws 13), which can be swiveled from the cooling roller 7 and adjusted against it by means of a swiveling device l6 actuated by an actuating cylinder 15.
  • the contact pressure between the squeegee strip and the cooling roller can be adjusted on the spring 17 with the aid of the adjusting nut 25.
  • a pull rod 28 is articulated on the swivel part 26.
  • this pull rod By means of this pull rod, the squeegee bar is pressed against the cooling roller 7 by the spring 17 under adjustable contact pressure.
  • this spring is supported on an angle 29 fastened on the lever 20 and is placed at its other end against the adjusting nut 25.
  • FIG. 3 shows a traversing device for the doctor device shown in FIG. 2. (Compared to their positions shown in FIG. 2, the traversing axis 23, the lever 20, the pivoting part 26 and the pull rod 28 are shown in different angular positions in FIG. 3 for better clarity.)
  • the length of the squeegee strip 14 is dimensioned such that when it is traversed, at least the jacket region of the cooling roller which is used by the paper web is coated in each of its positions. This length is then at least twice the traversing path greater than the width of the paper web.
  • the traversing movement is accomplished by means of a traversing cylinder 3l which is clamped between a fork 32 clamped on the traversing axis and the tab 21.
  • the traversing cylinder is actuated via valves and control lines (not shown), the stroke limitation being effected via limit switches 33 which are attached to the traversing axis and with a stop 34 connected to the axis 19 cooperate.
  • the traversing axis 23 is mounted in the tabs 21 so as to be longitudinally displaceable by means of bearing bushes 35. (Only one of the two brackets arranged near the ends of the axes is shown.)
  • the swivel part 26 is arranged so that it cannot move in the longitudinal direction of the traversing axis and is connected to one end of the pull rod 28 via an articulated rod head 36.
  • the spring 17 pushed on at the other end of the pull rod is supported on the angle 29 by means of a spherical disk 37.
  • the doctor bar 14 is provided in the contact area with the cooling roller 7 with a vulcanized-on elastomer casting resin.
  • a satisfactory service life of the squeegee strip can hereby be achieved.
  • squeegee strips that are worn out can be replaced with new ones by their detachable screw connection to the collecting container.
  • the entire doctor device can be pivoted away from the cooling roller in the manner described above.
  • the collecting container 9 can be removed from the machine after loosening the screws 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (6)

  1. Dispositif pour le traitement ultérieur d'une bande continue couchée ou imprimée au moins d'un côté, se composant dans l'essentiel d'un sécheur chauffant la bande pour une vaporisation de solvants, d'un canal d'humidification situé à la suite, parcouru par la bande, et d'un ensemble de cylindres de refroidissement (7, 11) disposés après le canal d'humidification (3) et dont les cylindres de refroidissement sont entourés chacun par la bande sur une zone de leur périphérie, et dont le premier cylindre de refroidissement est disposé dans la direction de passage de la bande de telle sorte qu'un côté couché ou revêtu de la bande et la surface de ce cylindre de refroidissement soient dirigés l'un vers l'autre, ainsi que d'un appareil de raclage agissant sur une zone périphérique, non entourée par la bande, du premier cylindre de refroidissement et qui a pour fonction d'empêcher de la vapeur de solvant précipitant sous forme d'un condensat d'entrer nouvellement en contact avec la bande arrivant sur le premier cylindre de refroidissement, caractérisé en ce que l'appareil de raclage comporte une lame de raclage (14) animée d'un mouvement de va-et-vient et pouvant être appliquée contre le premier cylindre de refroidissement (7).
  2. Dispositif selon la revendication 1,caractérisé en ce que l'appareil de raclage comprend un récipient collecteur (9) recevant du condensat de solvant enlevé par raclage.
  3. Dispositif selon la revendication 2, caractérisé en ce que le récipient collecteur (9) comporte une tubulure de décharge (10) pour une liaison avec un dispositif d'évacuation de condensat de solvant.
  4. Dispositif selon la revendication 1, caractérisé en ce que l'appareil de raclage est pourvu d'une lame de raclage remplaçable (14), sur laquelle est fixée par vulcanisation une résine d'élastomère moulable, au moins dans la zone de contact avec le cylindre de refroidissement (7).
  5. Dispositif selon la revendication 1, caractérisé en ce que la lame de raclage a une longueur plus grande que la largeur de la bande, au moins du double de la course unidirectionnelle de l'appareil de raclage à mouvement de va-et-vient.
  6. Dispositif selon la revendication 1, caractérisé en ce que l'appareil de raclage peut être écarté du cylindre de refroidissement (7) et appliqué contre celui-ci au moyen d'un dispositif de pivotement (16) actionné Par un cylindre de manoeuvre (15) et en ce que le dispositif de pivotement comporte un ressort réglable (17) déterminant la force d'application de la lame de raclage contre le cylindre de refroidissement.
EP87104697A 1986-04-30 1987-03-31 Dispositif pour le traitement ultérieur d'une bande continue couchée ou imprimée Expired - Lifetime EP0245634B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863614742 DE3614742A1 (de) 1986-04-30 1986-04-30 Einrichtung zur nachbehandlung einer beschichteten oder bedruckten gutbahn
DE3614742 1986-04-30

Publications (3)

Publication Number Publication Date
EP0245634A2 EP0245634A2 (fr) 1987-11-19
EP0245634A3 EP0245634A3 (en) 1988-07-20
EP0245634B1 true EP0245634B1 (fr) 1991-06-12

Family

ID=6299937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104697A Expired - Lifetime EP0245634B1 (fr) 1986-04-30 1987-03-31 Dispositif pour le traitement ultérieur d'une bande continue couchée ou imprimée

Country Status (6)

Country Link
US (1) US4852492A (fr)
EP (1) EP0245634B1 (fr)
JP (1) JPS62263052A (fr)
CN (1) CN1004543B (fr)
CA (1) CA1284028C (fr)
DE (1) DE3614742A1 (fr)

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
DE3723400C1 (de) * 1987-07-15 1989-02-23 Baldwin Gegenheimer Gmbh Verfahren und Vorrichtung zum Reinigen von Zylindern einer Rollendruckmaschine
DE4118807C2 (de) * 1991-06-07 1995-07-20 Eltex Elektrostatik Gmbh Vorrichtung zur Erhöhung des Wärmeübergangs an Kühlwalzen von Offset-Rollenrotationsmaschinen
US5167189A (en) * 1991-11-08 1992-12-01 Jones Phillip W Cylinder impurity remover apparatus
DE4325725C2 (de) * 1993-07-30 1998-02-19 Cleanpack Gmbh Innovative Verp Verfahren und Vorrichtung zum Aufwickeln von im Rollen-Offsetdruck bedruckten Folienbahnen
ES2122523T3 (es) * 1993-12-11 1998-12-16 Eltex Elektrostatik Gmbh Dispositivo asi como procedimiento para la fabricacion de hojas impresas.
DE4409954A1 (de) * 1994-03-23 1995-09-28 Bse Printtechnologie Kühlwalzenanordnung einer Rollenoffset-Druckmaschine
ATE168352T1 (de) * 1994-09-02 1998-08-15 Heidelberger Druckmasch Ag Leiteinrichtung für einen bogen
DE19615198C1 (de) * 1996-04-17 1997-07-24 Grafotec Gmbh Vorrichtung zur Rückbefeuchtung einer Bedruckstoffbahn
ITMI20031131A1 (it) * 2003-06-05 2004-12-06 Omet Srl Metodo e dispositivo per la pulizia di un cilindro di
US20060096121A1 (en) * 2004-11-05 2006-05-11 Yugen Kaisha Advanced Engineering Ink drying device of web offset press
DE102006027146B4 (de) * 2006-06-12 2009-06-04 Koenig & Bauer Aktiengesellschaft Verfahren zur Herabsetzung der benötigten Kühlleistung in einem Kühlwalzenständer einer Rollenrotationsdruckmaschine und eine Vorrichtung in einem Kühlwalzenständer mit Kühlwalzen
JP5745830B2 (ja) * 2010-12-06 2015-07-08 住友理工株式会社 固形天然ゴムの製造方法および製造装置
CN104908408B (zh) * 2015-06-08 2017-06-16 温州顺威包装有限公司 一种四色印刷机
CN109028875A (zh) * 2018-07-25 2018-12-18 赣州市翔义科技有限公司 一种服装面料用具有烘干除尘功能的清理装置
EP3702164B1 (fr) * 2019-03-01 2022-02-23 Ricoh Company, Ltd. Appareil, unité d'entrée d'air et appareil de sortie de liquide
CN114812140A (zh) * 2022-05-11 2022-07-29 徐亿强 一种具有自动输送功能的纺织烘干装置

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US1772470A (en) * 1928-07-13 1930-08-12 William J Snyder Ink-removing device
US1756841A (en) * 1928-09-01 1930-04-29 Ullring George Roll wiper or cleaner for printing presses and similar machines
DE1042611B (de) * 1943-03-27 1958-11-06 Edmund Arthur Rogge Schwenkbar gelagerte Rakel einer Tiefdruckmaschine
US3065487A (en) * 1960-11-21 1962-11-27 Vickerys Ltd Doctors for paper making machines
SE309902B (fr) * 1965-08-25 1969-04-08 Svenska Flaektfabriken Ab
US3656200A (en) * 1969-11-14 1972-04-18 Xerox Corp Cleaning apparatus
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US3835779A (en) * 1973-01-26 1974-09-17 Pitney Bowes Inc Apparatus for automatically cleaning the blanket cylinder of an offset printer
DE2716613C2 (de) * 1977-04-15 1982-09-16 Vits-Maschinenbau Gmbh, 4018 Langenfeld Vorrichtung zum Trocknen von bedruckten oder beschichteten Warenbahnen
IT1117306B (it) * 1977-06-27 1986-02-17 Bugnone Aldo Carrello per macchine per il trattamento in continuo di materiale in nastro
US4462169A (en) * 1982-02-19 1984-07-31 W. R. Grace & Company Web dryer solvent vapor control means
DE3328162C2 (de) * 1983-08-04 1986-02-20 J.M. Voith Gmbh, 7920 Heidenheim Papiermaschine

Also Published As

Publication number Publication date
CN87103696A (zh) 1987-11-11
CA1284028C (fr) 1991-05-14
JPS62263052A (ja) 1987-11-16
DE3614742C2 (fr) 1989-12-07
EP0245634A3 (en) 1988-07-20
EP0245634A2 (fr) 1987-11-19
CN1004543B (zh) 1989-06-21
US4852492A (en) 1989-08-01
DE3614742A1 (de) 1987-11-05

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