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EP0065783A1 - Dispositif pour sécher des bandes imprimées dans une machine à imprimer - Google Patents

Dispositif pour sécher des bandes imprimées dans une machine à imprimer Download PDF

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Publication number
EP0065783A1
EP0065783A1 EP82104556A EP82104556A EP0065783A1 EP 0065783 A1 EP0065783 A1 EP 0065783A1 EP 82104556 A EP82104556 A EP 82104556A EP 82104556 A EP82104556 A EP 82104556A EP 0065783 A1 EP0065783 A1 EP 0065783A1
Authority
EP
European Patent Office
Prior art keywords
drying
air
hoods
chamber
bridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82104556A
Other languages
German (de)
English (en)
Other versions
EP0065783B1 (fr
Inventor
Helmut Dr. Helbig
Manfred Verlemann
Günter Köwener
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0065783A1 publication Critical patent/EP0065783A1/fr
Application granted granted Critical
Publication of EP0065783B1 publication Critical patent/EP0065783B1/fr
Expired legal-status Critical Current

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Classifications

    • F26B21/30—
    • 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
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air

Definitions

  • the invention relates to a method for drying printed or coated webs, in which the web running through drying chambers or covered by drying hoods is blown with heated air, part of which is circulated until the desired solvent concentration is reached, and part as fresh air fed and the air withdrawn from the circuit with the desired solvent concentration is fed to an afterburner or a recovery system, and an apparatus for performing this method.
  • the performance of printing machines depends very much on the speed at which the printed webs can be dried, so that the achievable printing performance depends more on the drying speed than on the machine speed which is possible per se.
  • the drying capacity can be increased by increasing the temperature of the drying air with which the saturation limit increases and by increasing the air throughput.
  • the temperature of the drying air must be kept below areas in which damage or shrinkage of the material could occur, and the air throughput cannot be increased arbitrarily, especially since the circulation and the heating of considerable amounts of air entail considerable costs.
  • the object of the invention is to provide a drying process in which there is only so little exhaust air to be cleaned that these cleaning systems can be installed at reasonable costs.
  • this object is achieved in that the air is circulated until it has been enriched with solvent to a preselectable value, for example 0.5 LEL (lower explosion limit), and only then is drawn off.
  • a preselectable value for example 0.5 LEL (lower explosion limit)
  • the explosion protection regulations allow solvent concentrations up to 0.5 LEL, which are more than a hundred times higher than the legally permissible solvent concentrations of the exhaust air blown into the open.
  • the method according to the invention is thus the dryers can s Kunststoff g up to the maximum allowable by the exploded policy concentration value loaded with solvent, so that, drying is air-drying in the maximum authorized manner exploited and only the least possible amounts must be delivered to exhaust air to downstream cleaning equipment.
  • Example of a flexographic printing press In flexographic printing machines it is necessary to dry between the individual inking units so that the inks are at least so dry that the next layer of ink can be applied without fear of smearing or running into one another.
  • a so-called bridge drying In addition to this intermediate ink dryer drying, a so-called bridge drying must be provided, in which the web runs through a drying chamber. To It was customary to provide drying air circuits that were independent of one another for intermediate inking unit drying and for bridge drying.
  • the air in the circuit is passed in sequence through the drying chamber of the bridge and at least some of it through the drying hoods of the individual printing units and the false air entering the area of the inlet slots and, if appropriate, also outlet slots of the drying chamber or the drying hoods is suctioned off.
  • the inking unit drying and the bridge drying are connected in series in a dry air circuit, not only can the amount of air held in the circuit be reduced, but this is also loaded twice with solvent in each cycle, so that the desired high solvent concentrations can be reached earlier.
  • the desired high solvent concentrations can, however, only be achieved if the inflow of false air is reduced in such a way that the drying air is prevented from diluting below the desired high concentration.
  • the inlet and outlet slots for the web cannot be reduced arbitrarily because the web flutters, the false air must be extracted to prevent entry into the slot areas. Nevertheless, it cannot be prevented that the drying air in the circuit is constantly increased by sucking in the wrong air. A certain amount of air must therefore constantly be removed from the circuit via the mixing chamber, as is known, for example, from DE-AS 12 62.296.
  • the circuit can be set so that the air discharged from the mixing chamber has the desired high concentration and the circulated air circulated in the circuit is kept at the permissible concentration values by the entry of supply air and false air. It is also possible to use the circulatory system remove all or part of the guided air after it has accumulated to the maximum permissible concentration value and replace it with fresh air.
  • a device for carrying out the method according to the invention with a mixing chamber, at least one circulation fan and at least one heating chamber is characterized according to the invention in that the drying chamber of the bridge, the drying hoods of the individual printing units connected in parallel, the mixing chamber, the circulation fan and the heating chamber through pipes connecting these are connected in series.
  • the inlet and outlet slots of the drying chamber and the drying hoods are expediently surrounded by annular suction seals.
  • bypass lines can be provided for partially bridging the drying hoods of the printing units, because usually the amount of air required for the intermediate inking unit drying will be smaller than that for the bridge drying.
  • Fresh air is drawn in by a fan 3 via a mixing chamber 4, as is known for example from DE-AS 12 62 296, heated in a heating chamber 5 and measured by a thermometer 6, via a distributor pipe 7 to the individual slot nozzles 1.1 of the bridge 1 or the individual slot blowers 2.2 of the printing unit drying device 2.
  • the warm air laden with solvents is extracted together with the leaked air drawn in from the side of the printed web by a fan 8 via a common suction line 9 from the drying boxes 1.3 or 2.3 and fed to the mixing chamber 4, where, depending on the position of the control flap 4.1 either released into the open or possibly returned to the drying process together with fresh air.
  • Fig. 3 the arrangement of the bridge 1 and the drying boxes 2 on the printing unit can be seen.
  • the "drying process is now explained on the basis of the course of the web to be printed.
  • the web 11 is drawn off from a supply roll 12, fed via guide rollers 13 to the printing unit 14, where it is printed by the individual plate cylinders 15.
  • Between the individual plate cylinders 15 are Drying boxes 2.3 are arranged, in which warm air is blown onto the freshly printed web 11.
  • the web is then fed to the drying box 1 on the bridge 16, where the remaining solvents are removed from the web 11 by blowing warm air in.
  • the web then passes through a pressure monitoring station 17 to the winding station 18, where it is wound up into a supply roll 19.
  • the known circuits explained with reference to FIGS. 1 and 2 are connected in series in the manner shown in FIG. 4.
  • the air circulated per unit of time can be, for example, 200 m 3 / min. to 100 m 3 / min. to reduce.
  • the air can be heated further by a further heating chamber 5.2 if this is necessary.
  • a heat exchanger 33 is arranged in the line 31, 32 and emits its heat via a line 34 to a heat exchanger 35 arranged in the line 21. This reduces the heating chamber 5.1 heat output.
  • a temperature sensor 36 is arranged in line 32, the signal of which is processed in a control device 37, which either supplies the heating chamber 5.2 with current or actuates a valve 38 arranged in line 34, depending on whether the printing unit 2 receives warmer or colder air should.
  • the warm air passes from line 32 to the drying boxes 2 arranged on the printing unit, each of which can be shut off individually by means of flaps 7.1 or 9.1.
  • the supply air can also be supplied through a bypass 39, in which a control flap 40 is arranged, bypassing the drying boxes 2 directly or in part to the suction line 9.
  • a pressure measuring device 41 is arranged behind the ventilator 27, by means of which the servomotor 42 moving the control flap 40 is influenced.
  • a fan 43 is arranged in line 9, which sucks the air to be circulated from the drying boxes 2 arranged on the printing unit and forwards it to the mixing chamber 4.
  • a bypass 44 branches off from line 31 and leads to line 9, into which it opens in front of fan 43. The flow through the bypass 44 can be adjusted by an adjusting flap 45.
  • the control flap 4.1 of the mixing chamber 4 is controlled by a servomotor 4.2.
  • a measuring device 46, 47, 48 is arranged with which the concentration of solvents of the warm air circulating in the lines is measured.
  • the values ejected by the measuring devices 46 to 48 are processed and converted into control pulses for the servomotor 4.2.
  • the measuring devices. 46 to 48 work continuously and are adjustable to the organic solvents used. Your Control signals can be set to a percentage LEL value (lower explosion limit), preferably 50% according to the current safety rules.
  • the flap 4.1 has already opened completely or cannot be opened further because it is stuck or because of another obstacle, an output is provided in the associated control electronics, not shown, which is connected to the main drive of the printing press by an electrical line and via which the speed of the machine is reduced until the selected and set maximum permissible concentration value is reached again.
  • the measuring devices 46 to 48 are equipped with a self-monitoring device, ie if the concentration control fails, appropriate safety measures are initiated, such as opening the control flap 4.1 or reducing the machine speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Drying Of Solid Materials (AREA)
EP82104556A 1981-05-25 1982-05-25 Dispositif pour sécher des bandes imprimées dans une machine à imprimer Expired EP0065783B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813120738 DE3120738A1 (de) 1981-05-25 1981-05-25 Verfahren und vorrichtung zum trocknen von bedruckten oder beschichteten bahnen.
DE3120738 1981-05-25

Publications (2)

Publication Number Publication Date
EP0065783A1 true EP0065783A1 (fr) 1982-12-01
EP0065783B1 EP0065783B1 (fr) 1986-01-29

Family

ID=6133163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104556A Expired EP0065783B1 (fr) 1981-05-25 1982-05-25 Dispositif pour sécher des bandes imprimées dans une machine à imprimer

Country Status (3)

Country Link
US (1) US4502228A (fr)
EP (1) EP0065783B1 (fr)
DE (2) DE3120738A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0427308A1 (fr) * 1989-11-07 1991-05-15 Stork Contiweb B.V. Régulation de la concentration de solvants dans un sécheur
EP0481554A1 (fr) * 1990-10-19 1992-04-22 ROTOMEC - Costruzioni Meccaniche Elettriche - S.p.A. Dispositif centralisé pour la distribution, la recirculation et l'évacuation d'air
US5577445A (en) * 1992-03-06 1996-11-26 Heidelberger Druckmaschinen Ag Control system for web-fed rotary printing machines
AT501300B1 (de) * 2005-04-19 2006-08-15 Wienerberger Ag Verbindungsleitung
WO2014086900A1 (fr) * 2012-12-06 2014-06-12 Koenig & Bauer Aktiengesellschaft Presse rotative

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134788A (en) * 1990-12-20 1992-08-04 Advance Systems Inc. Dryer apparatus for floating a running web and having an exhaust flow rate control system
DE19505971C5 (de) * 1995-02-21 2013-03-14 Windmöller & Hölscher Kg Vorrichtung zum Trocknen von bedruckten oder beschichteten Bahnen
US20110014290A1 (en) * 1995-09-15 2011-01-20 Boston Scientific Scimed, Inc. System and method for facilitating hemostasis with an absorbable sponge
DE19755812B4 (de) * 1997-12-16 2009-01-02 Giko Verpackungen Gmbh Verfahren und Vorrichtung zur Regelung der Luftbeladung
DE29805066U1 (de) * 1998-03-20 1998-05-28 MAN Roland Druckmaschinen AG, 63075 Offenbach Blasluftversorgung für eine Druckmaschine
DE29819202U1 (de) 1998-10-28 1999-02-11 Vits Maschinenbau GmbH, 40764 Langenfeld Vorrichtung zum Trocknen und Kühlen frisch bedruckter Papierbahnen
US6305098B1 (en) * 2001-01-29 2001-10-23 Officine Meccaniche Giovanni Cerutti S.P.A. Rotary printing press drying assembly roller
ATE374104T1 (de) * 2002-03-20 2007-10-15 Comexi Sa Flexodrucker mit kammern mit einer regulierten temperatur und dampfabzug
ITTO20030019A1 (it) * 2003-01-17 2004-07-18 Valmet Rotomec S P A Ora Rotomec S P A Dispositivo centralizzato a condotto unico per la distribuzione e l'evacuazione di aria.
EP1631262A4 (fr) * 2003-06-12 2010-05-05 Boston Scient Ltd An Irish Co Systeme et procede ameliores pour faciliter l'hemostase au moyen d'une eponge absorbable
US7716850B2 (en) * 2006-05-03 2010-05-18 Georgia-Pacific Consumer Products Lp Energy-efficient yankee dryer hood system
DE102010026604A1 (de) * 2010-07-09 2012-01-12 Heidelberger Druckmaschinen Ag Bogenverarbeitende Maschine mit einem oder mehreren Trocknern
DE102010062145B4 (de) * 2010-11-29 2015-10-29 Koenig & Bauer Ag Druckmaschine mit mindestens einem einen Heißlufttrockner aufweisenden Trocknersystem sowie Verfahren zum Betrieb einer Druckmaschine mit mindestens einem Heißlufttrockner
DE102013108054A1 (de) 2013-07-26 2015-01-29 Jenoptik Katasorb Gmbh Vorrichtung zum Aufbringen von Stoffgemischen auf eine Materialbahn und Verfahren zur Reinigung von Abgasen der Vorrichtung
KR101806850B1 (ko) * 2017-07-12 2017-12-08 주식회사 부성엔지니어링 유기용제 측정에 의한 폐열회수와 폐열 재사용 기능을 갖는 인쇄건조장치 및 그 제어방법
CN112219080A (zh) * 2018-05-01 2021-01-12 瓦尔梅特股份有限公司 具有热空气注入的空气穿透干燥系统和方法
US10739072B2 (en) * 2018-05-31 2020-08-11 Valmet, Inc. Through air drying and bonding systems and methods for maintaining uniform supply air temperature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE701547C (de) * 1937-01-10 1941-01-18 Koenig & Bauer Schnellpressfab Aus mehreren selbstaendigen Rotationstiefdruckwerken bestehende Druckmaschinenanlage
DE1262296B (de) * 1966-05-18 1968-03-07 Windmoeller & Hoelscher Trockenvorrichtung fuer Anilin-Druckmaschinen
DE2150259A1 (de) * 1971-10-08 1973-04-12 Burda Farben Kg Geraet zum regeln der bahntrocknung an tiefdruckrotationsmaschinen
DE2608661A1 (de) * 1976-03-03 1977-09-08 Hans Jacob Dipl Ing Moestue Vorrichtung zum bedrucken und trocknen von boegen
US4150495A (en) * 1978-05-03 1979-04-24 Bobst-Champlain, Inc. LEL (lower explosive limit) control with automatic calibration capability

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724907A (en) * 1951-08-20 1955-11-29 Monforts Fa A Driers operating in conjunction with printing machines
US3457657A (en) * 1967-01-16 1969-07-29 Fmc Corp Printing press web supporting and driving rolls
US4087923A (en) * 1974-05-07 1978-05-09 Salem Corporation Method of operating an incinerator
JPS5240680A (en) * 1975-09-22 1977-03-29 Santo Tekkosho Kk Pressure sealing device for high pressure steamer
GB1584207A (en) * 1977-11-09 1981-02-11 Baker Perkins Holdings Ltd Drying printed web material
US4281465A (en) * 1978-07-17 1981-08-04 Ameg Verfahrens-Und Umweltschutz-Technik Ag Method and apparatus for the recovering of solvents in dry cleaning units
US4343096A (en) * 1980-11-25 1982-08-10 Bobst Champlain, Inc. System for controlling emissions of a solvent from a printing press

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE701547C (de) * 1937-01-10 1941-01-18 Koenig & Bauer Schnellpressfab Aus mehreren selbstaendigen Rotationstiefdruckwerken bestehende Druckmaschinenanlage
DE1262296B (de) * 1966-05-18 1968-03-07 Windmoeller & Hoelscher Trockenvorrichtung fuer Anilin-Druckmaschinen
DE2150259A1 (de) * 1971-10-08 1973-04-12 Burda Farben Kg Geraet zum regeln der bahntrocknung an tiefdruckrotationsmaschinen
DE2608661A1 (de) * 1976-03-03 1977-09-08 Hans Jacob Dipl Ing Moestue Vorrichtung zum bedrucken und trocknen von boegen
US4150495A (en) * 1978-05-03 1979-04-24 Bobst-Champlain, Inc. LEL (lower explosive limit) control with automatic calibration capability

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0427308A1 (fr) * 1989-11-07 1991-05-15 Stork Contiweb B.V. Régulation de la concentration de solvants dans un sécheur
US5174044A (en) * 1989-11-07 1992-12-29 Stork Contiweb B.V. Control of the concentration of solvents in a dryer
EP0481554A1 (fr) * 1990-10-19 1992-04-22 ROTOMEC - Costruzioni Meccaniche Elettriche - S.p.A. Dispositif centralisé pour la distribution, la recirculation et l'évacuation d'air
US5577445A (en) * 1992-03-06 1996-11-26 Heidelberger Druckmaschinen Ag Control system for web-fed rotary printing machines
AT501300B1 (de) * 2005-04-19 2006-08-15 Wienerberger Ag Verbindungsleitung
WO2014086900A1 (fr) * 2012-12-06 2014-06-12 Koenig & Bauer Aktiengesellschaft Presse rotative
CN105073431A (zh) * 2012-12-06 2015-11-18 柯尼格及包尔公开股份有限公司 卷筒纸印刷机
EP2928695B1 (fr) 2012-12-06 2017-05-03 Koenig & Bauer AG Presse rotative
CN105073431B (zh) * 2012-12-06 2017-05-17 柯尼格及包尔公开股份有限公司 卷筒纸印刷机

Also Published As

Publication number Publication date
DE3268772D1 (en) 1986-03-13
EP0065783B1 (fr) 1986-01-29
DE3120738A1 (de) 1982-12-09
US4502228A (en) 1985-03-05

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