WO2011138350A1 - Machine à imprimer - Google Patents

Machine à imprimer Download PDF

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Publication number
WO2011138350A1
WO2011138350A1 PCT/EP2011/057092 EP2011057092W WO2011138350A1 WO 2011138350 A1 WO2011138350 A1 WO 2011138350A1 EP 2011057092 W EP2011057092 W EP 2011057092W WO 2011138350 A1 WO2011138350 A1 WO 2011138350A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing machine
drying
printed material
gas jet
printing
Prior art date
Application number
PCT/EP2011/057092
Other languages
German (de)
English (en)
Inventor
Harald HÖFENER
Andreas Ihme
Frank Gunschera
Jens Goldenstein
Jürgen Erdmann
Original Assignee
Windmöller & Hölscher 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 Windmöller & Hölscher Kg filed Critical Windmöller & Hölscher Kg
Priority to ES11719222.9T priority Critical patent/ES2508522T3/es
Priority to EP11719222.9A priority patent/EP2566694B1/fr
Publication of WO2011138350A1 publication Critical patent/WO2011138350A1/fr

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

Definitions

  • the invention relates to a printing press according to the preamble of claim 1.
  • material either sheets or sheets, is printed with ink.
  • the most important constituents of the printing ink are color pigments and a solvent (often referred to as the wet component).
  • the solvent evaporates while the color pigments remain on the printed material.
  • the applied ink should be dried, i. that is, a sufficient portion of the solvent should have evaporated.
  • drying devices are used, which generally include a fan, with which the printed material can be acted upon by a gas jet.
  • the gas is usually air. However, other gases may be used. Often, the gas has been heated in the drying device by means of a tempering device in order to facilitate the mass transfer of the solvent molecules into the gas stream.
  • a problem with the drying of printed material is that when it is transported on the material, air molecules remain adherent and thus form laminar boundary layers, which make the detachment of solvents more difficult.
  • the object of the present invention is therefore to propose an improved printing machine, in which the drying or the evaporation of solvents is facilitated in the drying of the printed material.
  • a device is provided with which the basic blowing speed can be modulated.
  • the basic blowing speed with this device can be varied between a maximum speed and a minimum speed.
  • the gas jet can be acted upon by a vibration with the device mentioned, with the result that the speed of the gas jet varies periodically between the maximum and the minimum speed. Due to the ever-changing air pressures, it is possible, at least in part, to set the laminar boundary layers adhering to the printed material transported in the printing press into turbulent motion and to reduce or even completely dissolve these laminar boundary layers.
  • the device with which the basic blowing speed can be modulated is an ultrasonic generating device.
  • Ultrasound is particularly good at causing the air to vibrate, causing the laminar boundary layers to detach.
  • Ultrasound can be generated in comparatively simple ways. At frequencies from 20 kHz to 1 GHz one speaks of ultrasound. Sound refers to longitudinal waves in which the air pressure varies. In this case, the speed of the individual air molecules is constantly changing via known relationships. Further embodiments of the invention will become apparent from the description and the claims.
  • FIG. 4 A modification of the embodiment shown in FIG. 3
  • FIG. 5 A further modification of that shown in FIG.
  • Fig. 8 shows another embodiment of an inventive
  • Fig. 1 shows a printing press 1, in this case a web-processing, so-called central cylinder printing press.
  • a printing press such printing machines are often used for packaging printing.
  • printing method here is the flexographic printing.
  • Inventive printing presses can be configured very differently and work with different printing methods.
  • the printing machine comprises an unwinding device 2, in which a roller 3 is rotatably mounted, from which the material web 4 can be pulled off.
  • the transport direction is indicated by the arrow 5.
  • the web is guided to the impression cylinder 7 and applied to this.
  • the direction of rotation of the impression cylinder 7 results from the arrow 8.
  • Assigned to the impression cylinder 7 are a total of four inking units 9, 10, 1 1, 12, each comprising a printing cylinder 13, 14, 15, 16, with which the print motif is applied to the web 4.
  • the other components of the inking units are known in the art and therefore need no further description at this point.
  • Each inking unit processes one printing ink.
  • a so-called intermediate inking unit dryer 17, 18, 19 is provided between each two inking units.
  • the web leaves the impression cylinder and is guided by guide rollers in the drying box 20, wherein the guide rollers are arranged so that they do not touch the printed side of the material web 4.
  • the material web is dried to the extent that it can then be wound up in the winding device 21 onto a winding 22.
  • the drying box 20 may comprise a plurality of blast air boxes 23, which may be constructed like the intermediate inking driers 17, 18, 19.
  • FIG. 2 Using the example of the intermediate dye dryer 19, a structure is shown in FIG. 2, as can be found in a printing press according to the invention.
  • the counter-pressure cylinder 7 (as an example of any kind of guide element) and the material web 4 are also indicated.
  • the arrow 24 stands for the transport direction of the supply air.
  • This is supplied to the insert 27 via the connecting piece 25, which is fastened in a lateral wall of the housing 26.
  • This insert further comprises a nozzle bar 28, which extends at least over the width of the material web 4, but whose nozzle width, seen in the direction of the material web, is getting narrower.
  • an ultrasonic generating unit 33 which is supported on the rear wall of the insert 27 via a support element, such as a support plate 34.
  • This ultrasound generating unit 33 may carry on its front side facing the material web a membrane or another elastic element in order to increase the influence range of the ultrasound generating unit.
  • Below this membrane strip-shaped one or more piezoelectric crystals are arranged, which are connected to unillustrated electrical leads.
  • FIG. 3 shows the view III-III of FIG. 2.
  • FIG. 4 shows a modification of the embodiment of the invention shown in FIG.
  • the cross-section of the nozzle bar 28 is not symmetrical to the radial direction of the impression cylinder constructed, but shows slightly against the transport direction of the web, so that the gas jet blows partially against the transport direction and thus increases the relative gas velocity.
  • the laminar boundary layer can be disturbed more effectively and the degree of turbulence can be increased. A better transfer of the solvent into the gas jet is achieved.
  • FIG. 5 shows a further embodiment of the invention.
  • the ultrasonic generating device 33 is arranged laterally on the nozzle bar 28 and thus does not disturb the gas jet on the way to the material web.
  • FIG. 6 shows a further possibility of realizing a printing press according to the invention.
  • the ultrasonic generating device 40 shown here operates on the principle of a whistle. A portion 30 'of the gas jet passes through the inlet region 41 at high speed on the tongue 42. This device vibrates and also excites the air in the gap 43 to vibrations, which has an effect on the gas jet 30, which makes its way to the material web modulated speed continues.
  • the ultrasound generating device 40 may also extend transversely to the material web 4, which, however, has no or no appreciable influence on the active principle.
  • FIGS. 7 and 8 show further possibilities of modulating the basic blowing speed of the supply air 30, which forms a gas jet.
  • the exit gap 45 is influenced in its width in different ways.
  • FIG. 7 shows a rotating body 46 which comprises bores or longitudinal slots 47 through which the supply air 30 can enter and exit. However, the supply air only emerges when the longitudinal slot 47 is at least partially over the outlet gap 45. Otherwise it builds up inside of the body 46, an overpressure, which then discharges again. It can come to a periodic build-up and release of the overpressure, which ultimately represents a modulation of the Grundblas Anlagen.
  • FIG. 8 shows a strip which can be pushed by a drive in front of the gap 45 or removed therefrom. The drive can in turn be done for example by a piezoelectric crystal. Other drives are possible, such as an electric motor. However, preferred are drives that allow a high frequency. Of course, such opening and closing of the outlet gap 45 may be periodic.
  • FIG. 9 shows an advantageous modification of the embodiment as shown in FIG.
  • the ultrasonic generating device 40 extends into the outlet tip of the nozzle bar, so that no air flow can flow past the ultrasonic generating device 40. The efficiency can be increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)

Abstract

L'invention concerne une machine à imprimer (1) comportant au moins un dispositif de séchage (17, 18, 19, 23) pour sécher un matériau imprimé qui peut être transporté à l'aide d'un dispositif de transport à l'intérieur de la machine à imprimer (1). Le dispositif de séchage (17, 18, 19, 23) comporte une soufflante conçue pour soumettre le matériau imprimé à un jet de gaz, de manière à faire évaporer la composante humide de l'impression et à sécher le matériau imprimé, le jet de gaz pouvant être appliqué à une vitesse de soufflage de base. En outre, un dispositif permet de moduler la vitesse de soufflage de base.
PCT/EP2011/057092 2010-05-07 2011-05-04 Machine à imprimer WO2011138350A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES11719222.9T ES2508522T3 (es) 2010-05-07 2011-05-04 Máquina impresora
EP11719222.9A EP2566694B1 (fr) 2010-05-07 2011-05-04 Machine à imprimer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028770.9 2010-05-07
DE102010028770 2010-05-07

Publications (1)

Publication Number Publication Date
WO2011138350A1 true WO2011138350A1 (fr) 2011-11-10

Family

ID=44201164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/057092 WO2011138350A1 (fr) 2010-05-07 2011-05-04 Machine à imprimer

Country Status (3)

Country Link
EP (1) EP2566694B1 (fr)
ES (1) ES2508522T3 (fr)
WO (1) WO2011138350A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615934A (zh) * 2012-04-10 2012-08-01 张玉海 桥式四色薄膜柔印刷机
EP3476602A1 (fr) * 2017-10-30 2019-05-01 HP Scitex Ltd Séchage d'agent d'impression
WO2020222806A1 (fr) * 2019-04-30 2020-11-05 Hp Scitex Ltd. Appareil de séchage d'agent d'impression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230018812A1 (en) * 2020-01-14 2023-01-19 Hewlett-Packard Development Company, L.P. Image formation with ultrasonic liquid removal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687293C (de) * 1936-04-25 1940-01-26 Koenig & Bauer Schnellpressfab Verfahren zum Trocknen der in Tiefdruckmaschinen bedruckten Papierbahnen o. dgl.
US4414755A (en) * 1980-10-01 1983-11-15 Svecia Silkscreen Maskiner Ab Drying device intended for drying material bearing print issuing from a printing machine
US4591517A (en) * 1984-06-08 1986-05-27 Overly, Inc. Web dryer with variable ventilation rate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687293C (de) * 1936-04-25 1940-01-26 Koenig & Bauer Schnellpressfab Verfahren zum Trocknen der in Tiefdruckmaschinen bedruckten Papierbahnen o. dgl.
US4414755A (en) * 1980-10-01 1983-11-15 Svecia Silkscreen Maskiner Ab Drying device intended for drying material bearing print issuing from a printing machine
US4591517A (en) * 1984-06-08 1986-05-27 Overly, Inc. Web dryer with variable ventilation rate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615934A (zh) * 2012-04-10 2012-08-01 张玉海 桥式四色薄膜柔印刷机
EP3476602A1 (fr) * 2017-10-30 2019-05-01 HP Scitex Ltd Séchage d'agent d'impression
CN109720106A (zh) * 2017-10-30 2019-05-07 惠普赛天使公司 打印试剂干燥
EP3640034A1 (fr) * 2017-10-30 2020-04-22 HP Scitex Ltd Séchage d'agent d'impression
CN109720106B (zh) * 2017-10-30 2020-12-18 惠普赛天使公司 打印试剂干燥单元和方法
WO2020222806A1 (fr) * 2019-04-30 2020-11-05 Hp Scitex Ltd. Appareil de séchage d'agent d'impression
JP2022522672A (ja) * 2019-04-30 2022-04-20 エイチピー・サイテックス・リミテッド 印刷剤乾燥装置

Also Published As

Publication number Publication date
EP2566694B1 (fr) 2014-07-16
ES2508522T3 (es) 2014-10-16
EP2566694A1 (fr) 2013-03-13

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