EP3758939A1 - Sécheur - Google Patents

Sécheur

Info

Publication number
EP3758939A1
EP3758939A1 EP19709838.7A EP19709838A EP3758939A1 EP 3758939 A1 EP3758939 A1 EP 3758939A1 EP 19709838 A EP19709838 A EP 19709838A EP 3758939 A1 EP3758939 A1 EP 3758939A1
Authority
EP
European Patent Office
Prior art keywords
nozzle body
bedruckbahn
dryer
gas
opening
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.)
Pending
Application number
EP19709838.7A
Other languages
German (de)
English (en)
Inventor
René HEINZE
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.)
Bobst Bielefeld GmbH
Original Assignee
Bobst Bielefeld GmbH
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 Bobst Bielefeld GmbH filed Critical Bobst Bielefeld GmbH
Publication of EP3758939A1 publication Critical patent/EP3758939A1/fr
Pending legal-status Critical Current

Links

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
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air
    • 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
    • B41F23/043—Drying webs by convection using gas or fuel burners
    • 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
    • F26B13/108—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials using one or more blowing devices, e.g. nozzle bar, the effective area of which is adjustable to the width of the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure

Definitions

  • the invention relates to a dryer for gassing a running Bedruckbahn in a rotary printing press, with a nozzle body.
  • Rotary printing machines are essentially printing presses in which unrolled webs or webs of material are unrolled and printed and then rolled up again.
  • the printing machines are for different materials, e.g. Paper or foil designed.
  • different colors are used, such as detergent, water or indicator colors.
  • drying nozzles are used to dry the ink of the images printed on the printing web.
  • a drying gas is introduced into a nozzle body, the nozzle slot is directed to the Betikbahn, so that the Betikbahn fumigated over the entire width as evenly as possible with the drying gas and thereby dried.
  • a sheet metal body which is divided into two chambers, as a dryer.
  • the one chamber (supply air chamber) passes, the heated gas to the drying material web
  • the other chamber (exhaust chamber) leads the enriched with solvent or water Fuft of the material web.
  • nozzle lance In the supply air chamber is a so-called nozzle lance, which can be removed for cleaning out of the chamber.
  • This fan consists of a 5 mm wide slot from which the gas flows to the material web. For a better Fuft Entry is achieved, in addition to the wedge-shaped form small Feitbleche incorporated.
  • a drying nozzle with a hollow nozzle body wherein the nozzle body has a nozzle slot extending transversely to the direction of fauf of the printing material web.
  • the nozzle body has an inner tube and an outer tube surrounding the inner tube, each having at least one outlet opening in its peripheral wall, and that the nozzle slot is formed by an overlapping zone of the Austrittsöffhungen the inner tube and the outer tube and is adjustable by changing the angular position of the inner tube relative to the outer tube.
  • EP 3 112 156 Al it is known an arrangement of several over the entire width of the Bedruckbahn extending nozzles in a row. This arrangement is very large and is therefore suitable only for use as a post-drying arrangement.
  • the object of the invention is to provide a dryer which is able to work with lower gas velocities / pressures and thus lower powers.
  • the nozzle body has at least two extending over only a portion of a width of the Betikbahn opening for the exit of heated gas and having at least one opening for returning the cooled gas.
  • a uniform air flow can advantageously be achieved over a relatively small space requirement over the entire printing web, which leads to a uniform drying result. Due to the homogeneous air flow significantly less turbulence occurs that does not affect the material web. This feature increases the dryer's print quality enormously. Compared to conventional dryers, it is now possible to install and remove these without disassembly of other components for cleaning purposes. Due to the modular design, individual components can be removed, and in some cases even without tools. It has proved to be particularly advantageous if the openings are at least partially offset. This makes it possible that each area of the printing web is also dried.
  • Good results could be achieved if the at least one opening has a round, oval, or a shape approximating such a shape.
  • the openings may all have the same or different shapes. Good results have been achieved, for example, with openings having an outlet opening in the range of 1 to 10 mm, preferably 2 to 5 mm.
  • the at least one opening for the exit of heated gas protrudes from a peripheral surface of the nozzle body. In this way it can be ensured that the heated gas is fed directly to the printing web.
  • the one opening for returning the cooled gas is provided outside the cavity. For example, it is possible to remove the cooled gas along the nozzle body and laterally.
  • an exhaust is provided for returning the cooled gas.
  • the present invention relates to a method for drying a moving printing web in a rotary printing machine, wherein the current Bechristbahn is dried by means of heated gas from a dryer with a nozzle body, the cooled gas at least partially along the printing path opposite surface of the Nozzle body is returned to the dryer and wherein there is at least substantially in the region between the outlet of the heated gas and the Beyakbahn a negative pressure.
  • Such a method can provide good drying results, in particular, when the suppression during operation is permanent and uniform.
  • the cooled gas is returned by means of suction.
  • the cooled gas is supplied to a cleaning. In this way it would be possible to reuse the gas or return it to the atmosphere.
  • the dryers according to the present invention can be used in particular as an intermediate drying nozzle in a rotary printing press.
  • the invention relates to a rotary printing press comprising a printing cylinder for printing a moving Bechristbahn and a dryer for Begasen the Bechristbahn, with a nozzle body, characterized in that the nozzle body at least two only over a portion of a width of the Bechristbahn extending opening to the outlet of heated gas and having at least one opening for returning the cooled gas, wherein there is at least substantially in the region between the outlet of the heated gas and the Betikbahn a negative pressure.
  • Fig. 1 is a perspective view of a nozzle body according to a preferred
  • Fig. 2 is a detail view of the nozzle body according to a preferred
  • FIG. 3 shows a perspective sectional view of the nozzle body according to a preferred embodiment of the invention
  • FIG. 4 shows a cross section of the nozzle body according to FIG. 3;
  • Fig. 5 is a detail view of the nozzle body of Fig. 1;
  • FIG. 6 shows a dryer according to a further preferred embodiment in an installed state.
  • Fig. 7 Completely assembled nozzle body in plan view
  • Fig. 1 is a perspective view of a nozzle body 1 is shown according to a preferred embodiment of the invention, wherein by way of example the structure of this is shown as an intermediate drying nozzle.
  • the dryer consists according to the embodiment shown of a so-called overpressure and a negative pressure range.
  • Fig. 2 a detail view.
  • Fig. 1 shows the area from which the air flows out and is sucked in again at the same time. From the zoom view of Fig. 2, the structure of the drying nozzle is visible.
  • a type of sheet 4 is provided on the nozzle body, which is designed here as a grid plate, which is fixed for example by means of rivets on the example milled base body 5.
  • This main body 5 is in turn secured in a main frame, for example by means of screws.
  • Fig. 7 shows a nozzle body in a view of the outlet nozzles.
  • the nozzles are the openings 2, which have a substantially round shape and are all formed substantially the same.
  • the openings are arranged transversely in the direction of movement of the Betikbahn in a kind of line, while they are arranged offset in the direction of travel of the Betikbahn at an angle.
  • the angle can be in a range of 2 to 30 °, preferably 5 to 15 °.
  • FIG. 3 shows an exemplary construction of a nozzle body 1 in a perspective view.
  • Fig. 4 shows a cross section of this nozzle body.
  • the air which is either already heated or still heated passes through a nozzle 6 in the cavity 7 of the nozzle body, or overpressure.
  • the air leaves this through the small outlet openings 2 (arrow 8), bounces against the material of the tape to be printed, reverses (arrow 10) and passes through the recesses in the milled base body (arrow 9 and lO) to the lateral ends 11.
  • the medium flows "above” the overpressure area or past the overpressure area in the direction of the suction opening 12. Above this suction opening there are preferably so-called stay bolts 13 to which the air suction is connected.
  • the air extraction consists of differently screwed nozzles.
  • FIG. 5 shows a detailed view of the nozzle body 1 according to FIG. 1, here the inlet or connecting piece for the heated or to be heated air or gas is shown.
  • Fig. 6 shows a dryer according to another preferred embodiment in a built-in state.
  • the entire drying unit is arranged here, for example, between a crossbeam 14 and a central cylinder 15 in a rotary printing press.
  • Fig. 6 are two dryers to see, with more dryers can be arranged.
  • the nozzle body 1 is fastened by means of a holder 16 in a printing unit.
  • a collecting pipe 17, into which the exhaust air is discharged, is located, according to the embodiment shown, on sheet metal holders 18, which are suspended in the crosspiece 14.
  • FIG. 6 With a dryer according to the present invention, it is now also possible, due to the modular structure, to install and remove it from the printing unit without dismantling other components for cleaning purposes. With appropriate connections, individual components can also be mounted without tools thanks to the modular design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

La présente invention concerne un sécheur permettant d'aérer une bande d'impression en mouvement dans une presse rotative, ledit sécheur étant doté d'un corps de buse. Le sécheur selon l'invention se caractérise en ce que le corps de buse présente au moins un orifice pour l'éjection du gaz chauffé et au moins un orifice pour la recirculation du gaz refroidi.
EP19709838.7A 2018-02-27 2019-02-26 Sécheur Pending EP3758939A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18020082 2018-02-27
PCT/EP2019/025053 WO2019166129A1 (fr) 2018-02-27 2019-02-26 Sécheur

Publications (1)

Publication Number Publication Date
EP3758939A1 true EP3758939A1 (fr) 2021-01-06

Family

ID=61622294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19709838.7A Pending EP3758939A1 (fr) 2018-02-27 2019-02-26 Sécheur

Country Status (4)

Country Link
US (1) US11559980B2 (fr)
EP (1) EP3758939A1 (fr)
CN (1) CN112041168B (fr)
WO (1) WO2019166129A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3932672B1 (fr) 2020-07-01 2024-05-15 Bobst Bielefeld GmbH Machine d'impression avec un séchoir

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494048A (en) 1968-01-22 1970-02-10 Fmc Corp Web edge baffle in jet drying hood
IT1153853B (it) * 1982-09-22 1987-01-21 Cerutti Spa Off Mec Dispositivo di ventilazione per macchine da stampa, in particolare per macchine rotative a rotocalco
US6293196B1 (en) 1993-10-06 2001-09-25 Howard W. DeMoore High velocity, hot air dryer and extractor
DE19915923C2 (de) * 1999-04-09 2001-10-04 Babcock Textilmasch Umlufttrockner
CN2363255Y (zh) 1999-02-11 2000-02-09 梁德才 节能高效干燥装置
DE10125771C1 (de) * 2001-05-26 2002-11-21 Eisenmann Kg Maschbau Trockner
US9068775B2 (en) * 2009-02-09 2015-06-30 Heat Technologies, Inc. Ultrasonic drying system and method
ES2426113T3 (es) 2009-07-24 2013-10-21 Bobst Italia S.P.A. Equipo de secado con tratamiento de aire falso para máquinas de impresión
DE102009059822B4 (de) 2009-12-21 2015-12-10 Grenzebach Bsh Gmbh Verfahren und Vorrichtung zum Trocknen von Gipsplatten
CN101830104B (zh) 2010-05-28 2012-01-25 张雨晨 一种用于多色印刷印间烘炉的带有热风循环的排风***
DE102011110842A1 (de) 2011-08-23 2013-02-28 Outotec Oyj Vorrichtung und Verfahren zur thermischen Behandlung von stückigem oder agglomeriertem Material
EP3112156B1 (fr) 2015-06-30 2018-05-02 Maklaus S.r.l. Machine flexographique avec fonctionnalité accrue, en particulier pour l'impression de matériau fin et extensible
CN105398205B (zh) 2015-12-23 2017-12-12 青岛莱伊迪光电科技有限公司 一种led uv印刷固化装置
CN105398206B (zh) * 2015-12-29 2018-01-19 重庆科欣塑料有限公司 一种烘干设备
DE202016102780U1 (de) 2016-05-25 2017-08-28 Bobst Bielefeld Gmbh Trocknungsdüse

Also Published As

Publication number Publication date
US20210001620A1 (en) 2021-01-07
US11559980B2 (en) 2023-01-24
WO2019166129A1 (fr) 2019-09-06
CN112041168B (zh) 2022-04-12
CN112041168A (zh) 2020-12-04

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