EP0922574A1 - Dispositif de guidage de feuilles dans une machine à imprimer - Google Patents

Dispositif de guidage de feuilles dans une machine à imprimer Download PDF

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Publication number
EP0922574A1
EP0922574A1 EP98121726A EP98121726A EP0922574A1 EP 0922574 A1 EP0922574 A1 EP 0922574A1 EP 98121726 A EP98121726 A EP 98121726A EP 98121726 A EP98121726 A EP 98121726A EP 0922574 A1 EP0922574 A1 EP 0922574A1
Authority
EP
European Patent Office
Prior art keywords
printing
cylinder
sheet guiding
gap
openings
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
EP98121726A
Other languages
German (de)
English (en)
Other versions
EP0922574B1 (fr
Inventor
Hanns-Otto Haas
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0922574A1 publication Critical patent/EP0922574A1/fr
Application granted granted Critical
Publication of EP0922574B1 publication Critical patent/EP0922574B1/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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B65H2406/1222—Nozzles adjustable impact angle

Definitions

  • the invention relates to a sheet guiding device in a printing press according to the preamble of the main claim.
  • a device of this type is known from EP 0 306 682 A2.
  • the facility consists essentially of two blowing strips acted upon by blowing air, the front and after that formed by a blanket cylinder and an impression cylinder Pressure gap across the cylinder width are arranged axially parallel.
  • Front blow bar is in the gusset-shaped space above the incoming one Arch arranged between blanket cylinder and impression cylinder.
  • Blown air flow is on the blanket cylinder, in the pressure zone itself as well on the top of the sheet guided on the impression cylinder in the gripper closure directed.
  • the rear blow arranged in the conveying direction after the pressure zone bar achieves a blast air flow, which is on the top of the on the pressure cylinder guided sheet and on the blanket cylinder against the conveying direction is directed.
  • blowing device known from MAN-Roland Druckmaschinen AG in the Roland 800 series, one Rotary printing machine based on the five-cylinder principle, from 1978 to 1995 was realized and sold.
  • This blowing device is a plurality spaced from each other in the cylinder axis length and the curvature of the Pressure cylinder jacket surface formed guide elements, each Guide element has a hollow cylindrical cross section. Every guide element has obliquely arranged in the wall, against the pressure cylinder and the direction of conveyance of the printing material directed blowing air openings, which prevent the sheet from lifting off the impression cylinder surface.
  • the interior of the hollow cylindrical guide element represents the blown air chamber represents, which is coupled with a pneumatic system for the blower supply.
  • the Blowing air openings wall of the guide elements provides a Outer contour that is adapted to the outer surface of the printing cylinder. Farther additional blown air openings are arranged, which - transversely to the direction of movement considered - in the edge area of the guide elements inwards and outwards are directed outside.
  • a sheetfed press for perfecting on the principle Rubber against rubber in a pressure zone is known from DE 26 03 483 A1.
  • the sheet guide is designed such that in the conveying direction of the printing material a first blow pipe with openings coupled to a compressor is arranged, the blown air jet of the printing material against the feed drum presses and a contact of the substrate with the lower blanket cylinder prevented in front of the pressure nip.
  • a Suction box arranged with a preferably concave curved suction surface, which serves to vacuum the printing material.
  • the suction box is with a Vacuum source coupled.
  • the invention has for its object a sheet guiding device in a To create printing machine that avoids the disadvantages mentioned, in particular a more even guidance of the substrate without touching the Permitted sheet guiding device on the impression cylinder and an improved Guaranteed entry of the substrate into a printing nip.
  • the sheet guiding device To lift the sheet-like substrate from the impression cylinder surface different pressure ratios on the The top of the substrate. So is in the conveying direction of the substrate that formed from blanket cylinder (or forme cylinder) and impression cylinder Arranged a sheet guiding device in which the kinetic Energy of the blown air flow is converted into printing energy acting on the printing material is. The printing energy acting on the substrate is in the conveying direction increasing towards the pressure gap.
  • the sheet guiding device has several pneumatically actuated chambers on the substrate have directed openings for the blowing air outlet.
  • the sheet guiding device is arranged in front of the printing nip in such a way that between the underside of the sheet guiding device and the impression cylinder surface an inlet gap is formed, which in the conveying direction to the pressure gap has a tapered course.
  • sheet guiding device in addition to that in front of the pressure gap in the conveying direction arranged sheet guiding device a further sheet guiding device arranged after the printing nip.
  • This sheet guide device is used for guidance the substrate when leaving the printing nip. It is on the Printing energy acting on the printing material falling in the conveying direction after the printing nip, the sheet guiding device having a plurality of pneumatically actuatable has openings for the blowing air outlet directed towards the printing material. Between the underside of the sheet guiding device and the surface of the impression cylinder an outlet gap is formed, starting from the pressure gap in the conveying direction has an enlarged gap.
  • a sheet-fed rotary printing press is shown in a row construction in accordance with FIG. 1.
  • Several printing units 1 with printing cylinders 10 are strung together and connected to each other by means of transfer drums 4 or turning systems 3.
  • Transfer drums 4 and turning systems 3 have associated sheet guiding devices 7 on.
  • the last printing unit 1 is followed by a delivery 2, which the printing material by means of sprocket shaft 5 and revolving chain system 6 transported in the conveying direction 8 along sheet guiding devices 7 and on a boom stack.
  • Each printing unit 1 consists of in a known manner a printing cylinder 10, a blanket cylinder 11 and a plate cylinder 24.
  • the plate cylinder 24 is an inking unit and possibly a dampening unit assigned, so that we shall not go into further here.
  • one or more coating units can also be assigned to the printing units.
  • a coating unit is comparable to a printing unit 1.
  • the blanket cylinder 11 of the printing unit then, as is known, corresponds to the forme cylinder of the coating unit, which with an application roller and a coating system in Functional connection is.
  • the printing cylinder 10 also takes over in the coating unit Function of the sheet guide cylinder.
  • Blanket cylinder 11 (or forme cylinder) and impression cylinder 10 form one Printing nip 12, through which in the printing on position the sheet-shaped printing material transported and printed or varnished.
  • the printing material lying on the outer surface of the printing cylinder 10 contactless to the blanket cylinder (forme cylinder) 11 the printing nip 12 happen.
  • a sheet guiding device 9 is arranged in the conveying direction 8 in front of the printing nip 12.
  • the sheet guiding device 9 has an approximately wedge-shaped cross section, which extends in a box shape over the width of the impression cylinder or at least over the minimum width of the format and is coupled to a pneumatic system for the supply of blown air.
  • the sheet guiding device 9 projects into the gusset-shaped space of the printing nip 12, formed by blanket cylinders (forme cylinders) 11 and printing cylinders 10, and is divided into several chambers by partitions - in the present embodiment into three chambers 13, 14, 15.
  • the chambers 13 to 15 have openings 16, the blowing air emerging therefrom having a gradient with respect to the pressure energy P 1 to P 3 , such that the pressure energy P 1 of the blowing air is greatest at the openings 16 of the chamber 13 and the pressure energy P 3 of the blowing air at the openings 16 of the chamber 15 is lower.
  • the sheet guiding device 9 is supported on both sides in side frames.
  • the bearing is preferably a swivel 25, so that the sheet guiding device 9 can be pivoted at a defined angle about the axis of rotation.
  • the sheet guide device 9 can thus be adjusted in its distance from the printing cylinder 10, for example depending on the basis weight of the printing materials to be processed or on the printing subject. This distance represents an inlet gap 23 which - despite the pivotability of the sheet guiding device 9 - is always tapered in the direction of the printing gap 12.
  • Each chamber 13 to 15 can have a separate blown air supply 17. Since there is often limited space in the gusset-shaped pressure gap 12, preferably only one blown air supply 17 is coupled to the chamber 15 remote from the pressure gap 12 (see FIG. 3). Air ducts 19 with corresponding openings 20 protrude from this chamber 15 like a comb into the chamber 13 adjacent to the pressure gap 12. The blown air supply 17 has openings 18 which are functionally connected to the air supply 19. The partitions between the chambers 13, 14 and 14, 15 in turn have openings 21, 22. The air flows through the openings 21 from the chamber 13 to the chamber 14 and back through the openings 22 from the chamber 14 to the chamber 15.
  • blowing air flows out of the openings 16 arranged on the underside of the sheet guiding device 9, the kinetic energy being converted into printing energy P 1 to P 3 acting on the printing material.
  • the pressure energy P 1 is assigned to the area of the chamber 13, the pressure energy P 2 to the area of the chamber 14 and the pressure energy P 3 to the area of the chamber 15, where P 1 > P 2 > P 3 applies.
  • the openings 16 in the sheet guiding device 9 are arranged obliquely, so that the blown air flow is directed against the conveying direction 8 of the printing material guided on the printing cylinder 10 in order to prevent the printing material from being lifted off, in particular the trailing edge, from the outer surface of the printing cylinder 10 .
  • the sheet guiding device 9 has at least one further opening 16 which - in the direction of the printing gap 12 - is directed against the blanket cylinder (forme cylinder) 11 in such a way that the blown air flow in front of the printing gap 12 blows against the blanket cylinder (forme cylinder) 11 and on the blanket cylinder (Forme cylinder) 11 deflected and directed against the conveying direction 8, the printing material on the jacket of the printing cylinder 10 guides and smoothes out.
  • a further sheet guiding device 9 for guiding the printing material after the printing nip 12 is arranged in a second embodiment.
  • the downstream sheet guiding device 9 is essentially a mirror image of the sheet guiding device 9 arranged upstream of the printing nip 12.
  • the training is not limited to three chambers 13 to 15.
  • the sheet guide device 9 with only one chamber 13 or gem.
  • Fig. 2 formed with two chambers 13, 14, which extend at least over the minimum format width, but preferably over the cylinder width.
  • the downstream sheet guiding device 9 has a blown air supply (not shown) in the chamber 14, which is designed analogously to the blown air supply 17 with an air supply 19 and openings 20 of the upstream sheet guiding device 9.
  • a partition with openings 21 is again arranged between the chambers 13, 14.
  • the chambers 13, 14 On the underside of the sheet guiding device 9, the chambers 13, 14 have openings 16 for the blowing air outlet.
  • the kinetic energy of the exiting blown air is in turn converted into printing energy P 1 , P 2 acting on the printing material.
  • the chamber 13 is adjacent to the pressure gap 12 and the chamber 14 faces away from the pressure gap.
  • the pressure energy P 1 assigned to the chamber 13 is greater than the pressure energy P 2 assigned to the chamber 14 (P 1 > P 2 ).
  • the openings 16 in the sheet guiding device 9 are arranged obliquely, so that the blown air flow is directed against the conveying direction 8 of the printing material guided on the printing cylinder 10 in the direction of the printing nip 12, so that the printing material is also lifted off the printing cylinder 10 when it leaves the printing gap 12 to avoid.
  • the downstream sheet guiding device 9 preferably has at least one further opening 16, which is directed towards the pressure gap 12 and a blown air flow against the blanket cylinder (forme cylinder) 11 and / or tangential to the blanket cylinder (forme cylinder) 11 in the direction Pressure gap 12 blows.
  • the sheet guiding device 9 is again preferably in frame-fixed swivel joints pivoted so that the distance to Printing cylinder 10 is adjustable. This distance represents an outlet gap 26 starting from the pressure gap 12, regardless of the pivotability of the Sheet guiding device 9 - extended in conveying direction 8.
  • the mode of operation is as follows: In the printing on position (blanket cylinder / forme cylinder 11 is in pressure contact with printing cylinder 10), the sheet-like printing material is transferred from the transfer drum 4 or the turning system 3 to the printing cylinder 10 and transported there in the gripper closure in the conveying direction 8.
  • the sheet guiding device 9 arranged upstream of the printing nip 12 generates a constant blown air flow at the openings 16, the kinetic energy being converted into printing energy P 1 to P 3 acting on the printing material.
  • the lower printing energy P 3 initially acts on the printing material, then the higher printing energy P 2 and finally the highest printing energy P 1 .
  • the printing energy P 1 which results from the blown air flow directed towards the blanket cylinder / forme cylinder 11 (opening 16 in the tip of the chamber 13), is deflected on the outer surface of the blanket cylinder / forme cylinder 11 and spreads out the printing material against the conveying direction 8.
  • the print-off position bladenket cylinder / forme cylinder 11 is out of contact with the impression cylinder 10
  • the blown air flow is maintained.
  • the printing cylinder 10 continues to guide the printing material past the activated sheet guiding device 9 in the conveying direction 8 in the gripper closure and the printing energies P 3 ⁇ P 2 ⁇ P 1 act on the upper side of the printing material.
  • the printing energy P 1 which also results from the blowing air flow directed towards the blanket cylinder / forme cylinder 11 (opening 16 in the tip of the chamber 13), is deflected at the blanket cylinder / forme cylinder 11 and spreads out the printing material counter to the conveying direction 8.
  • the printing energies P 1 > P 2 act on the printing material in the conveying direction 8.
  • the pressure energy P 1 which results from the blowing air flow directed towards the blanket cylinder / forme cylinder 11 or the pressure gap 12 (opening 16 in the top of the chamber 13), is reduced in the pressure on position on the jacket of the blanket cylinder / forme cylinder 11.
  • the blown air emerging from the openings 16 in the tip of the respective chamber 13 flows from the sheet guide 9 downstream of the printing gap 12 with the sheet guide 9 arranged upstream from the opposite side in the direction of the blanket cylinder / forme cylinder 11 and into the exposed printing gap 12, and forms on Sheath of rubber blanket cylinder / form cylinder 11 an air cushion, resulting from the printing energy P 1 , which prevents the contact of the conveyed printing material with the blanket cylinder / form cylinder 11.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP98121726A 1997-11-29 1998-11-14 Dispositif de guidage de feuilles dans une machine à imprimer Expired - Lifetime EP0922574B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753089 1997-11-29
DE19753089A DE19753089C2 (de) 1997-11-29 1997-11-29 Bogenführungseinrichtung in einer Druckmaschine

Publications (2)

Publication Number Publication Date
EP0922574A1 true EP0922574A1 (fr) 1999-06-16
EP0922574B1 EP0922574B1 (fr) 2002-02-20

Family

ID=7850285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121726A Expired - Lifetime EP0922574B1 (fr) 1997-11-29 1998-11-14 Dispositif de guidage de feuilles dans une machine à imprimer

Country Status (4)

Country Link
EP (1) EP0922574B1 (fr)
JP (1) JPH11227161A (fr)
AT (1) ATE213463T1 (fr)
DE (2) DE19753089C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1123805A1 (fr) * 2000-02-10 2001-08-16 Mitsubishi Heavy Industries, Ltd. Unité de conduite des feuilles pour une machine à imprimer à feuilles

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040519A1 (de) 1999-09-20 2001-03-22 Heidelberger Druckmasch Ag Bogenleiteinrichtung für eine Bogendruckmaschine
DE10005391A1 (de) * 2000-02-07 2001-08-09 Roland Man Druckmasch Verfahren und Vorrichtung zur Bogenführung in einer Rotationsdruckmaschine
DE10011979C5 (de) * 2000-03-11 2008-02-14 Man Roland Druckmaschinen Ag Einrichtung zur Bogenführung in einer Druckmaschine
DE10141415A1 (de) 2000-08-31 2002-03-14 Heidelberger Druckmasch Ag Vorrichtung zum Führen von Bogen in einer Bogen verarbeitenden Maschine
EP1995064B1 (fr) 2000-10-26 2012-12-12 Koenig & Bauer AG Dispositif de guidage de feuilles dans des machines d'impression pour assister au transport des feuilles
DE10161883B4 (de) * 2001-01-22 2011-03-10 Heidelberger Druckmaschinen Ag Bogenführungseinrichtung in einer Druckmaschine
DE10310690A1 (de) 2002-04-12 2003-10-30 Heidelberger Druckmasch Ag Bogenführungseinrichtung in einer bogenverarbeitenden Maschine
DE10350621A1 (de) * 2003-10-30 2005-06-02 Koenig & Bauer Ag Bogenführungseinrichtung
DE102004009100B4 (de) * 2004-02-25 2011-07-07 KOENIG & BAUER Aktiengesellschaft, 97080 Verfahren und Vorrichtung zur abschmierfreien Führung biegesteifer Bogen in einem nicht aktiven Werk einer Bogenrotationsdruckmaschine
DE102008051582B4 (de) * 2007-11-05 2015-07-02 Heidelberger Druckmaschinen Ag Anordnung zur Inspektion eines Bogens in einer Druckmaschine
DE102010003011A1 (de) 2010-03-18 2011-09-22 Manroland Ag Druckzylinderbogenführungsvorrichtung
CN108621547A (zh) * 2017-03-21 2018-10-09 南京造币有限公司 一种印刷纸张展平装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246100A2 (fr) * 1986-05-14 1987-11-19 Wallace Knight Limited Dispositif pour prévenir le décollement d'une bande ou d'une feuille d'un cylindre tournant
GB2302522A (en) * 1995-06-24 1997-01-22 Heidelberger Druckmasch Ag Apparatus for obtaining good contact of a printing substrate in a printing press

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2603483B2 (de) * 1976-01-30 1978-06-08 Reinhard Mohn Ohg, 4830 Guetersloh Verfahren zum Führen eines Bogens zum gleichzeitigen Bedrucken mit einem Schön- und Widerdruck sowie Vorrichtung zur Durchführung des Verfahrens
DE3730386C1 (de) * 1987-09-10 1989-04-13 Roland Man Druckmasch Vorrichtung zum Foerdern von Bogen durch die Druckzone von Gummituchzylinder und Druckzylinder einer Bogenrotationsdruckmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246100A2 (fr) * 1986-05-14 1987-11-19 Wallace Knight Limited Dispositif pour prévenir le décollement d'une bande ou d'une feuille d'un cylindre tournant
GB2302522A (en) * 1995-06-24 1997-01-22 Heidelberger Druckmasch Ag Apparatus for obtaining good contact of a printing substrate in a printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1123805A1 (fr) * 2000-02-10 2001-08-16 Mitsubishi Heavy Industries, Ltd. Unité de conduite des feuilles pour une machine à imprimer à feuilles

Also Published As

Publication number Publication date
DE19753089A1 (de) 1999-06-02
EP0922574B1 (fr) 2002-02-20
ATE213463T1 (de) 2002-03-15
DE59803130D1 (de) 2002-03-28
JPH11227161A (ja) 1999-08-24
DE19753089C2 (de) 2000-06-29

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