EP0298238B1 - Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf dem Formzylinder einer Bogen-Rotationstiefdruckmaschine - Google Patents

Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf dem Formzylinder einer Bogen-Rotationstiefdruckmaschine Download PDF

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Publication number
EP0298238B1
EP0298238B1 EP88108290A EP88108290A EP0298238B1 EP 0298238 B1 EP0298238 B1 EP 0298238B1 EP 88108290 A EP88108290 A EP 88108290A EP 88108290 A EP88108290 A EP 88108290A EP 0298238 B1 EP0298238 B1 EP 0298238B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
forme cylinder
clamping
printing plate
forme
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
EP88108290A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298238A2 (de
EP0298238A3 (en
Inventor
Heinrich Ochs
Kurt Difflipp
Lothar Hummel
Jürgen Dipl.-Ing. Ruh
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
Priority to AT88108290T priority Critical patent/ATE74555T1/de
Publication of EP0298238A2 publication Critical patent/EP0298238A2/de
Publication of EP0298238A3 publication Critical patent/EP0298238A3/de
Application granted granted Critical
Publication of EP0298238B1 publication Critical patent/EP0298238B1/de
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
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/125—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end on a curvilinear path, e.g. by winding on a roll

Definitions

  • the invention relates to a device for clamping a printing plate on the forme cylinder of a sheet-fed rotogravure printing machine according to the preamble of the first claim.
  • a device of this type is known from DE-PS 609 099.
  • the backing of the clamping bar which serves as a base for the clamped pressure plate, does not extend beyond the circumference of the forme cylinder because of a concentric pivoting movement about the forme cylinder axis, so that pressure plates can be clamped smoothly and flat on the forme cylinder when the forme cylinder channel is arranged straight or at an angle to the axis of rotation .
  • the main advantage of the invention is that because of the precise cylindrical rotation of the clamping bar surface, printing plates can be clamped smoothly and flatly on forme cylinders of large-format sheet-fed rotogravure printing presses with high clamping forces.
  • the clamping forces of the same size always act at the printing end of the printing plate across their entire width.
  • the operation of the device is facilitated when pressure medium is actuated in that only a switch has to be operated to switch the compressed air on or off. This reduces makeready times when changing plates on a sheet-fed rotogravure press.
  • a clamping bar 4 is arranged in the cylinder channel 2 of a forme cylinder 1 of a sheet-fed rotogravure printing machine in a known manner.
  • the clamping bar 4 is fastened by means of pins 5 to 8 on the sides in measuring rings 14, 15 of the forme cylinder 1.
  • the measuring rings 14, 15 are loosely pushed onto the two cylinder journals 16, 17 of the forme cylinder 1.
  • One end of a printing plate 3 clamped on the forme cylinder 1 is angled around the forme cylinder edge 10, while the other end of the printing plate 3 with the clamping edge 10 by pivoting the measuring rings 14, 15 against one end by means of an actuating device 18.
  • the measuring rings 14, 15 thus serve at the same time as a measuring basis for measuring cylinder lift thicknesses in a known manner, and also as a drive part according to the invention for tensioning a printing plate 3 on the forme cylinder 1 of a sheet-fed rotogravure printing machine.
  • a pressure medium-operated device is provided as an actuating device 18 for pivoting the measuring rings 14, 15.
  • One cylinder journal 17 of the two cylinder journals 16, 17 is designed so that it accommodates a hydraulic cylinder 20 equipped with an adjustable piston 21, for example as a screw-in cylinder, in a cavity coaxial to the forme cylinder axis 45.
  • This hydraulic cylinder 20 is connected via a distributor system, consisting of a bore 25 running in the direction of the forme cylinder axis 45, two subsequently radial bores 26, 28, two branch screw connections 30, 31 and subsequent two connecting lines 27, 29 with two secondary cylinders 32, 33 .
  • a closable bore 24 is used to fill the hydraulic fluid.
  • Appropriate cutouts 48, 49 are provided in the measuring rings 14, 15 for receiving the branch screw connections 30, 31.
  • One secondary cylinder 32 is arranged in a recess 46 on one end face and the other secondary cylinder 33 in a recess 47 on the other end face within the forme cylinder 1 such that the associated actuating pistons 34, 35 of the secondary cylinders 32, 33 are approximately tangential to the jacket of the forme cylinder 1 to one crank bolt 36, 37 fastened eccentrically to the forme cylinder axis 45 on the measuring rings 14, 15, non-positively.
  • a pneumatic / hydraulic amplifier arrangement is preferably provided on each side of the forme cylinder 1.
  • the device is not limited to this, but can also be replaced by another, e.g. manually operated drive for the adjustable piston 21 of the hydraulic cylinder 20 to be replaced.
  • the pneumatic / hydraulic booster arrangement consists of a pneumatic membrane cylinder 19 connected upstream of the hydraulic cylinder 20, which has a substantially larger pressure area than the hydraulic cylinder 20, so that the clamping forces are generated in an increased ratio of the pressure areas.
  • the pneumatic membrane cylinder 19 is e.g. via a reversing valve, not shown in the drawing, which is actuated by a switch and supplies a rotary transformer 44 with compressed air.
  • At least one projection 52 is provided in the jacket of the forme cylinder 1, which engages like a comb in at least one recess 53 of the clamping bar 4 .
  • the pneumatic / hydraulic actuation of the clamping bar 4, which can be pivoted coaxially to the forme cylinder axis 45 with the measuring rings 14, 15, enables the same and very high clamping forces to be generated at the pressure end of the pressure plate 3 over its entire width.
  • the coaxial mounting of the measuring rings 14, 15 reliably prevents the clamping bar surface from extending beyond the circumference of the forme cylinder 1 during the pivoting movement. This is particularly advantageous when the cylinder channel 2 is arranged obliquely.
  • the hollow lying of the pressure plate 3 can already be avoided during the clamping process.
  • the operation is simplified and the set-up time is reduced when changing plates on a sheet-fed rotogravure printing machine.
  • the operation of the pressure medium operated device is as follows: When the compressed air is switched on with a switch, compressed air is introduced into the pneumatic membrane cylinder 19 via the rotary transducer 44 by opening the reversing valve (not shown in the drawing). The contact pressure is increased in the ratio of the large pressure area of the pneumatic membrane cylinder 19 to the small pressure area of the hydraulic cylinder 20. Against the force of the compression spring 23 the adjustable piston 21 is first moved into the hydraulic cylinder 20. At the same time, the actuating pistons 34, 35 of the secondary cylinders 32, 33 are extended, since the hydraulic fluid is pressed against the actuating pistons 34, 35 via the distributor system 24 to 31.
  • the actuating pistons 34, 35 which are positively connected to the crank pins 36, 37, rotate the measuring rings 14, 15 relative to the forme cylinder 1 coaxially to the forme cylinder axis 45 and thus press the clamping bar 4 with one end (pressure end) of the pressure plate 3 against the other end (start of pressure) .
  • To release the clamping force it is only necessary to operate the switch of the reversing valve in order to switch off the compressed air.
  • the springs in the cylinders 19, 20, 32, 33 and the return springs 38, 39 then automatically spend all adjustable pistons 21 and 34, 35 in the hydraulic cylinders 20, 32, 33 as well as the pistons in the pneumatic diaphragm cylinder 19 and at the same time the measuring rings 14, 15 with the tension bar 4 back to the starting position, as shown in Fig. 1.
  • the pressure medium-operated device can be replaced by a mechanical device, the ease of use of the device being adversely affected by the fact that additional tools and manipulations are required, but the tensioning of the pressure plate 3 is comparable in the circumferential direction with a pressure-operated device.
  • the mechanical device preferably consists of toggle levers mounted in the cylinder channel 2 for pivoting the clamping bar 4 with the coupled measuring rings 14, 15.
  • the toggle lever actuating device is known in principle from DE-PS 3 220 530.
  • the toggle levers are used only for quick bridging of the large clamping path of the clamping bar 4, but not for final clamping in the circumferential direction.
  • the final clamping in the circumferential direction is rather done by at least one clamping screw 54 laterally on each measuring ring 14, 15, which is screw-supported in a threaded nut 55 attached to the measuring ring 14, 15 against a pressure piece 56 on the cylinder journal 16, 17 of the forme cylinder 1, so that the measuring rings 14, 15 are comparable to the pressure-medium-operated device by means of mechanical clamping screws 54 which can be pivoted using a tool after the large clamping path has already been bridged by toggle lever actuation of the clamping bar 4 with simultaneous pivoting of the measuring rings 14, 15.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP88108290A 1987-07-04 1988-05-25 Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf dem Formzylinder einer Bogen-Rotationstiefdruckmaschine Expired - Lifetime EP0298238B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88108290T ATE74555T1 (de) 1987-07-04 1988-05-25 Vorrichtung zum aufspannen einer biegsamen druckplatte auf dem formzylinder einer bogenrotationstiefdruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873722174 DE3722174A1 (de) 1987-07-04 1987-07-04 Vorrichtung zum aufspannen einer biegsamen druckplatte auf dem formzylinder einer bogen-rotationstiefdruckmaschine
DE3722174 1987-07-04

Publications (3)

Publication Number Publication Date
EP0298238A2 EP0298238A2 (de) 1989-01-11
EP0298238A3 EP0298238A3 (en) 1990-04-04
EP0298238B1 true EP0298238B1 (de) 1992-04-08

Family

ID=6330930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108290A Expired - Lifetime EP0298238B1 (de) 1987-07-04 1988-05-25 Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf dem Formzylinder einer Bogen-Rotationstiefdruckmaschine

Country Status (3)

Country Link
EP (1) EP0298238B1 (enrdf_load_stackoverflow)
AT (1) ATE74555T1 (enrdf_load_stackoverflow)
DE (2) DE3722174A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0663292B2 (en) * 1989-08-04 2000-03-29 Komori Corporation Plate lockup apparatus for sheet-fed press
DE3943119C1 (enrdf_load_stackoverflow) * 1989-12-27 1991-06-20 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE4210009C2 (de) * 1992-03-27 1994-05-11 Heidelberger Druckmasch Ag Drehdurchführung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE387696C (de) * 1924-01-02 Albert & Cie Akt Ges Vorrichtung zum Befestigen von Aufzuegen fuer Zylinder an Druckmaschinen
DE388929C (de) * 1922-12-10 1924-01-29 Georg Germann Plattenzylinder fuer Tiefdruckmaschinen mit einem Kern von auswechselbaren Haltebloecken zum Aufspannen der Druckplatten
DE609099C (de) * 1930-03-10 1935-02-07 Angelo Dagnino Befestigungs- und Spannvorrichtung fuer biegsame Druckplatten auf dem Formzylinder von Rotationstiefdruckmaschinen
GB925101A (en) * 1959-05-22 1963-05-01 Carl Allers Ets Improvements in or relating to printing machine cylinders
DE1125948B (de) * 1959-09-05 1962-03-22 Maschf Augsburg Nuernberg Ag Vorrichtung zum Aufspannen von biegsamen Druckplatten
DE1172690B (de) * 1961-06-14 1964-06-25 Maschf Augsburg Nuernberg Ag Vorrichtung zum Aufspannen von biegsamen Druckplatten auf den Formzylinder von Rotationsdruckmaschinen
DE1246764B (de) * 1964-10-26 1967-08-10 Winkler Maschf Aufspanneinrichtung fuer biegsame Druckplatten
FR1568127A (enrdf_load_stackoverflow) * 1968-02-14 1969-05-23
DE6930610U (de) * 1968-08-01 1973-09-13 Nebiolo Spa Zylinder zum festen anbringen von blattfoermigen teilen, insbesondere formzylinder von rotationsdruckmaschinen zum tragen von biegsamen druckformen.
DE6927286U (de) * 1969-07-04 1969-11-13 Koenig & Bauer Schnellpressfab Vorrichtung zum befestigen biegsamer druckplatten auf zylindern von rotationsdruckmaschinen
DE3220530C2 (de) * 1982-06-01 1985-02-21 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Aufspannen von Tiefdruckplatten
DE3300678A1 (de) * 1983-01-11 1984-07-19 Frankenthal Ag Albert Zylinder fuer tiefdruckmaschinen

Also Published As

Publication number Publication date
EP0298238A2 (de) 1989-01-11
EP0298238A3 (en) 1990-04-04
DE3869845D1 (de) 1992-05-14
DE3722174C2 (enrdf_load_stackoverflow) 1990-08-16
DE3722174A1 (de) 1989-01-12
ATE74555T1 (de) 1992-04-15

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