EP0687562B1 - Method and apparatus for mounting flexible printing plates - Google Patents
Method and apparatus for mounting flexible printing plates Download PDFInfo
- Publication number
- EP0687562B1 EP0687562B1 EP95107166A EP95107166A EP0687562B1 EP 0687562 B1 EP0687562 B1 EP 0687562B1 EP 95107166 A EP95107166 A EP 95107166A EP 95107166 A EP95107166 A EP 95107166A EP 0687562 B1 EP0687562 B1 EP 0687562B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- forme
- forme cylinder
- cylinder
- exerted
- 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
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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
- B41F27/1206—Feeding to or removing from the forme cylinder
Definitions
- the invention relates to a method and an apparatus for Mount flexible printing forms on the form cylinders of printing machines according to the preamble of the method or device claim.
- DE 4 214 207 C1 describes a pressure roller for pulling on Printing forms on the forme cylinder of printing presses known is mounted on and off relative to the forme cylinder. With the leading edge of the printing plate attached to the forme cylinder is through Turn the forme cylinder forward and the employee over the Pressure roller that reaches the format width of the printing form on this ironed on. By pressing the pressure roller in connection with their elastic surface (rubber) is thus created during the Aufzugens acting in the circumferential direction of the forme cylinder Tensile force on the printing form.
- the device described above can be largely problem-free can be used with offset printing plates.
- the use of pressure rollers known per se Printing forms which are mounted on the forme cylinders of printing units are working on the high pressure principle. According to that Proportion of printing and non-printing places then shows the Printing form different strengths. Therefore it is not possible such printing forms with a spread over the format width of the forme cylinder extending pressure roller properly, because the pressure roller the printing form only at its printing, ie raised areas presses against the forme cylinder.
- Such printing forms are used in particular in coating facilities in offset printing machines used and are then referred to as lacquer plates.
- so-called Nyloflex sheets are also known, in which a flexo plate on an aluminum support like an offset printing plate is applied. Even then the painting facility works according to the high-pressure or flexographic printing process.
- the object of the present invention is therefore a method and a device according to the preamble of the respective claim to develop such, so that flexible printing forms regardless of different strengths or other subject-dependent Characteristics can be optimally drawn onto the forme cylinder can.
- each axially facing outward Tractive forces are exerted to produce a spreading effect.
- the printing form not pressed against the forme cylinder over the entire width of the format is, but that to the full opening on the format edges of the Printing form both in the circumferential direction and in the axial direction of the forme cylinder is exerted tensile force.
- the application of the invention is not limited to printing forms, which work with the high-pressure or flexographic printing process Painting equipment or the like can be used. According to the invention Of course, principle can also be used for printing forms Mount the planographic printing machine on the forme cylinder. Here are the Printing plates of a sheetfed offset printing machine mentioned as an example.
- Fig. 1 shows a forme cylinder 1, around the outer circumference Printing form 2 is partially wound. Printing form 2 became one of them with its front edge on a clamping device in the pit of the Forme cylinder 1 attached. The mounting of the printing form 2 happens thereby by rotating the forme cylinder 1 in the direction shown So arrow it in the direction of printing.
- Fig. 1 is also on and with respect to the forme cylinder 1 this again lockable pressure roller 3.
- the pressure roller 3 is not designed as a continuous roller or the like, but according to the invention, two are on the left and right Format edge of the printing form 2 acting pressure rollers are provided.
- Fig. 2 shows his view of the forme cylinder 1 with the part around this mounted printing form 2. With the facing downwards The arrow is the direction of rotation of the forme cylinder 1 when it is being pulled up the printing form 2 reproduced.
- the effect of one of the two edge areas 4 of the printing form 2 exerted resulting tensile forces FR is such that the printing form 2 also in the axial direction on the surface of the Forme cylinder 1 is clamped.
- Tensile forces on the printing form 2 are therefore not necessary for the printing form 2 also in the middle area, which is between the edge areas 4 are located, i.e. where the printing subject is arranged is to press against the forme cylinder 1.
- the resulting Tensile forces FR in the left and right edge area 4 of the printing form 2 generate a sufficient spreading effect.
- Fig. 3 shows a simple embodiment of the invention to the resulting tensile forces FR described above on the left and to allow the right edge area 4 of the printing form 2 to act.
- a part of the printing form 2 is shown with the left edge area 4 according to FIG. 2.
- the left edge area 4 of the printing form 2 assigned pressure roller 3 is skewed with its axis opposite arranged the axis of the forme cylinder 1, the axis of the Forme cylinder is marked with A.
- A For the sake of clarity is an adjustable and removable storage or mounting of the Pressure roller 3 is not shown in relation to the forme cylinder 1.
- Such bearings are known per se and therefore require no further explanation.
- the right edge area 4 of the printing form 2 also one Pressure roller 3 assigned in mirror image (not shown).
- FIG. 4 shows a section through a so-called Nyloflex plate, which can be used in painting equipment which after High pressure or flexographic printing work.
- a cliché 6 which a defined thickness in the printing areas and in the non-printing areas Has corresponding recesses.
- This printing form 2 shows the left edge area 4.
- the Printing form 2 is chosen in its format such that the left and right stripe-shaped edge area 4 not colored and therefore does not print.
- the edge area is also corresponding 4 of the same strength as the cliché 6 in the printing Area trained.
- the edge areas 4 serve only that Interaction of the pressure rollers 3 according to the invention for winding the printing form 2.
- cylindrical pressure rollers 3 (Fig. 3) can of course also conical pressure rollers for production the spreading effect according to the invention can be used.
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Aufziehen flexibler Druckformen auf den Formzylinder von Druckmaschinen gemäß dem Oberbegriff des Verfahrens bzw. Vorrichtungsanspruches.The invention relates to a method and an apparatus for Mount flexible printing forms on the form cylinders of printing machines according to the preamble of the method or device claim.
Aus der DE 4 214 207 C1 ist eine Andrückrolle zum Aufziehen von Druckformen auf den Formzylinder von Druckmaschinen bekannt, welche gegenüber dem Formzylinder an- und abstellbar gelagert ist. Die mit der Vorderkante am Formzylinder befestigte Druckform wird durch Vorwärtsdrehen des Formzylinders und die angestellte über die Formatbreite der Druckform reichende Andrückrolle auf diesen aufgebügelt. Durch den Druck der Andrückrolle in Verbindung mit deren elastischer Oberfläche (Gummi) entsteht somit während des Aufziehens eine in Umfangsrichtung des Formzylinders wirkende Zugkraft auf die Druckform.DE 4 214 207 C1 describes a pressure roller for pulling on Printing forms on the forme cylinder of printing presses known is mounted on and off relative to the forme cylinder. With the leading edge of the printing plate attached to the forme cylinder is through Turn the forme cylinder forward and the employee over the Pressure roller that reaches the format width of the printing form on this ironed on. By pressing the pressure roller in connection with their elastic surface (rubber) is thus created during the Aufzugens acting in the circumferential direction of the forme cylinder Tensile force on the printing form.
Die zuvorstehend beschriebene Vorrichtung kann weitgehend problemlos bei Offsetdruckplatten eingesetzt werden. Problematischer ist dagegen die Verwendung von an sich bekannten Andrückrollen bei Druckformen, welche auf den Formzylinder von Druckwerken aufzuziehen sind, die nach dem Hochdruckprinzip arbeiten. Entsprechend dem Anteil druckender und nichtdruckender Stellen weist dann die Druckform unterschiedliche Stärken auf. Daher ist es nicht möglich solche Druckformen mit einer sich über die Formatbreite des Formzylinders erstreckenden Andrückrolle ordnungsgemäß aufzuziehen, da die Andrückrolle die Druckform lediglich an deren druckenden, also erhabenen Stellen gegen den Formzylinder drückt. Derartige Druckformen werden insbesondere bei Lackiereinrichtungen bei Offsetdruckmaschinen verwendet und werden dann als Lackplatten bezeichnet. Neuerdings sind auch sogenannte Nyloflex-Platten bekannt, bei denen auf einem Alu-Träger nach Art einer Offsetdruckplatte ein Flexoklischee aufgebracht ist. Auch dann arbeitet die Lackiereinrichtung nach dem Hochdruck- bzw. Flexodruckverfahren.The device described above can be largely problem-free can be used with offset printing plates. Is more problematic on the other hand, the use of pressure rollers known per se Printing forms, which are mounted on the forme cylinders of printing units are working on the high pressure principle. According to that Proportion of printing and non-printing places then shows the Printing form different strengths. Therefore it is not possible such printing forms with a spread over the format width of the forme cylinder extending pressure roller properly, because the pressure roller the printing form only at its printing, ie raised areas presses against the forme cylinder. Such printing forms are used in particular in coating facilities in offset printing machines used and are then referred to as lacquer plates. Recently, so-called Nyloflex sheets are also known, in which a flexo plate on an aluminum support like an offset printing plate is applied. Even then the painting facility works according to the high-pressure or flexographic printing process.
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren sowie eine Vorrichtung gemäß dem Oberbegriff des jeweiligen Anspruches derartig weiterzubilden, so daß flexible Druckformen unabhängig von unterschiedlichen Stärken oder sonstigen sujetabhängigen Eigenarten optimal auf den Formzylinder aufgezogen werden können.The object of the present invention is therefore a method and a device according to the preamble of the respective claim to develop such, so that flexible printing forms regardless of different strengths or other subject-dependent Characteristics can be optimally drawn onto the forme cylinder can.
Gelöst wird diese Aufgabe durch die kennzeichnenden Merkmale des Verfahrens bzw. des Vorrichtungsanspruches.This task is solved by the characteristic features of the Procedure or the device claim.
Erfindungsgemäß ist vorgesehen, daß zusätzlich zu einer in Umfangsrichtung auf die Druckform ausgeübten Zugkraft in den beiden Randbereichen der Druckform jeweils axial nach außen weisende Zugkräfte zur Erzeugung einer Breitstreckwirkung ausgeübt werden.According to the invention it is provided that in addition to one in the circumferential direction tensile force exerted on the printing form in the two Edge areas of the printing form each axially facing outward Tractive forces are exerted to produce a spreading effect.
Nach der Erfindung ist insbesondere vorgesehen, daß die Druckform nicht über die gesamte Formatbreite an den Formzylinder gedrückt wird, sondern daß zum satten Aufziehen an den Formaträndern der Druckform sowohl eine in Umfangsrichtung als auch in Achsrichtung des Formzylinders nach außen gerichtete Zugkraft ausgeübt wird. Dies hat den Vorteil, daß man lediglich an den Formaträndern der Druckform eine relativ schmale Andrückrolle vorzusehen hat, welche die gewünschte Breitstreckwirkung (Zugkraft sowohl im Umfangs- als auch in Axialrichtung) auf die Druckform ausübt.According to the invention it is particularly provided that the printing form not pressed against the forme cylinder over the entire width of the format is, but that to the full opening on the format edges of the Printing form both in the circumferential direction and in the axial direction of the forme cylinder is exerted tensile force. This has the advantage that you can only on the format edges Printing form has to provide a relatively narrow pressure roller, which the desired spreading effect (tensile force in both the circumferential and also in the axial direction) on the printing form.
Die Anwendung der Erfindung ist nicht auf Druckformen beschränkt, welche bei nach dem Hochdruck- bzw. Flexodruckverfahren arbeitenden Lackiereinrichtungen oder dgl. verwendet werden. Nach dem erfindungsgemäßen Prinzip lassen sich selbstverständlich auch Druckformen für Flachdruckmaschinen auf den Formzylinder aufziehen. Hier seien die Druckplatten einer Bogenoffsetdruckmaschine als Beispiel genannt.The application of the invention is not limited to printing forms, which work with the high-pressure or flexographic printing process Painting equipment or the like can be used. According to the invention Of course, principle can also be used for printing forms Mount the planographic printing machine on the forme cylinder. Here are the Printing plates of a sheetfed offset printing machine mentioned as an example.
Des weiteren erfolgt die Erläuterung eines Ausführungsbeispieles anhand der Zeichnungen.Furthermore, an exemplary embodiment is explained based on the drawings.
Es zeigt:
- Fig. 1
- einen Formzylinder mit einer erfindungsgemäßen Andrückrolle,
- Fig. 2
- die auf die Druckform auszuübenden Kräfte,
- Fig. 3
- eine Andrückrolle, welche auf dem linken Formatrand der Druckform gemäß Fig. 2 einwirkt, und
- Fig. 4
- den Schnitt durch eine perspektivisch dargestellte Nyloflex-Platte.
- Fig. 1
- a forme cylinder with a pressure roller according to the invention,
- Fig. 2
- the forces to be exerted on the printing form,
- Fig. 3
- a pressure roller, which acts on the left format edge of the printing form according to FIG. 2, and
- Fig. 4
- the section through a perspective view of the Nyloflex plate.
Fig. 1 zeigt einen Formzylinder 1, um dessen Außenumfang eine
Druckform 2 teilweise aufgezogen ist. Die Druckform 2 wurde dazu
mit ihrer Vorderkante an einer Klemmeinrichtung in der Grube des
Formzylinders 1 befestigt. Das Aufziehen der Druckform 2 geschieht
dabei durch Drehen des Formzylinders 1 in Richtung des dargestellten
Pfeil es also in Richtung des Druckbetriebes.Fig. 1 shows a forme cylinder 1, around the outer
In Fig. 1 ist ferner eine an dem Formzylinder 1 an- und bezüglich
diesem wieder abstellbare Andrückrolle 3. Die Andrückrolle 3 ist
dabei nicht als durchgehende Walze oder dgl. ausgebildet, sondern
erfindungsgemäß sind zwei jeweils auf den linken und rechten
Formatrand der Druckform 2 einwirkende Andrückrollen vorgesehen. In Fig. 1 is also on and with respect to the forme cylinder 1
this again
Diese sind in an sich bekannter Weise gestellfest gelagert und entsprechend den Formzylinder 1 gegenüber an- und abstellbar ausgebildet.These are mounted and fixed to the frame in a manner known per se corresponding to the forme cylinder 1 on and off educated.
Fig. 2 zeigt seine Ansicht auf den Formzylinder 1 mit der zum Teil
um diesen aufgezogenen Druckform 2. Mit dem nach unten gerichteten
Pfeil ist dabei die Drehrichtung des Formzylinders 1 beim Aufziehen
der Druckform 2 wiedergegeben.Fig. 2 shows his view of the forme cylinder 1 with the part
around this mounted
Auf den linken und rechten Randbereich 4 der Druckform 2 wirken
erfindungsgemäß je eine in Umfangsrichtung des Formzylinders 1
gerichtete Umfangskraft FU sowie je eine von der Druckform 2 nach
außen weilende axiale Zugkraft FA. Es gibt somit an dem linken und
rechten Randbereich 4 je eine nach links oben bzw. rechts oben
gerichtete resultierende Zugkraft FR, welche der Richtung des
Aufziehens der Druckform 2 entgegen gerichtet ist.Act on the left and
Die Wirkung einer der auf den die beiden Randbereiche 4 der Druckform
2 ausgeübten resultierenden Zugkräfte FR ist dabei dergestalt,
daß die Druckform 2 auch in Achsrichtung auf die Oberfläche des
Formzylinders 1 aufgespannt wird. Bei dieser Art der Ausübung von
Zugkräften auf die Druckform 2 ist es somit nicht nötig die Druckform
2 auch in deren mittleren Bereich, welche zwischen den Randbereichen
4 gelegen sind, also dort wo das druckende Sujet angeordnet
ist, gegen den Formzylinder 1 zu drücken. Die resultierenden
Zugkräfte FR im linken und rechten Randbereich 4 der Druckform 2
erzeugen dabei eine ausreichende Breitstreckwirkung.The effect of one of the two
Fig. 3 zeigt eine einfache erfindungsgemäße Ausgestaltung, um die
zuvorstehend beschriebenen resultierenden Zugkräfte FR am linken
und rechten Randbereich 4 der Druckform 2 einwirken zu lassen.
Dargestellt ist ein Teil der Druckform 2 mit dem linken Randbereich
4 gemäß Fig. 2. Die den linken Randbereich 4 der Druckform 2
zugeordnete Andrückrolle 3 ist windschief mit ihrer Achse gegenüber
der Achse des Formzylinders 1 angeordnet, wobei die Achse des
Formzylinders mit A gekennzeichnet ist. Aus Gründen der Übersichtlichkeit
ist eine an- und abstellbare Lagerung bzw. Halterung der
Andrückrolle 3 gegenüber dem Formzylinder 1 nicht wiedergegeben.
Derartige Lagerungen sind aber an sich bekannt und bedürfen daher
keiner weitergehenden Erläuterung.Fig. 3 shows a simple embodiment of the invention to the
resulting tensile forces FR described above on the left
and to allow the
Entsprechend der in Fig. 3 gezeigten Anordnung der Andrückrolle 3
und deren Zusammenwirken mit dem linken Randbereich 4 der Druckform
2 ist den rechten Randbereich 4 der Druckform 2 ebenfalls eine
Andrückrolle 3 spiegelbildlich zugeordnet (nicht dargestellt).According to the arrangement of the
Fig. 4 zeigt einen Schnitt durch eine sogenannte Nyloflex-Platte,
die bei Lackiereinrichtungen einsetzbar sind, welche nach dem
Hochdruck- bzw. Flexodruckverfahren arbeiten. Auf einem Alu-Träger
5 nach Art einer Offsetdruckplatte ist entsprechend dem druckenden
bzw. nichtdruckenden Sujet ein Klischee 6 aufgebracht, welches an
den druckenden Stellen eine definierte Stärke und in den nichtdruckenden
Stellen entsprechende Ausnehmungen aufweist. Auch bei
dieser Druckform 2 ist der linke Randbereich 4 dargestellt. Die
Druckform 2 ist dabei in ihrem Format derartig gewählt, daß der
linke und rechte streifenförmige Randbereich 4 nicht eingefärbt
wird und somit auch nicht druckt. Entsprechend ist auch der Randbereich
4 der gleichen Stärke wie das Klischee 6 im druckenden
Bereich ausgebildet. Die Randbereiche 4 dienen lediglich dem
Zusammenwirken der erfindungsgemäßen Andrückrollen 3 zum Aufziehen
der Druckform 2.4 shows a section through a so-called Nyloflex plate,
which can be used in painting equipment which after
High pressure or flexographic printing work. On an
Anstelle von zylinderförmigen Andrückrollen 3 (Fig. 3) können selbstverständlich auch konisch geformte Andrückrollen zur Erzeugung der erfindungsgemäßen Breitstreckwirkung eingesetzt werden. Instead of cylindrical pressure rollers 3 (Fig. 3) can of course also conical pressure rollers for production the spreading effect according to the invention can be used.
- 11
- FormzylinderForme cylinder
- 22nd
- DruckformPrinting form
- 33rd
- AndrückrollePressure roller
- 44th
- RandbereichEdge area
- 55
- Alu-TrägerAlu carrier
- 66
- Klischeecliche
- FUFU
- Zugkraft-UmfangTraction scope
- FAFA
- Zugkraft-AxialTraction axial
- FRFR
- resultierende Zugkraftresulting traction
Claims (3)
- Process for fitting flexible printing formes on the forme cylinders of printing presses in which, by turning the forme cylinder, a pulling force acting in the peripheral direction is exerted on the printing forme fixed to the forme cylinder, characterised in that additional to the pulling force (FU) exerted in the peripheral direction of the forme cylinder (1) on the printing forme (2) in both of the edge areas (4) of the printing forme (2) an axial pulling force (FA) directed outwardly is exerted.
- Process according to Claim 1, characterised in that both the pulling force (FU) acting in the peripheral direction and also the pulling force (FA) acting directed outwardly act exclusively on both of the outer edge regions (4) of the printing forme (2).
- Device for carrying out the process according to Claim 1 or 2, characterised in that arranged relative to both edge regions (4) of the printing forme (2) in each case is a pressing on roller 3 mounted settable against and away with respect to the forme cylinder (1), the rotational axes of which run in skewed orientation relative to the axis of the forme cylinder (1) and the arrangement of which runs in mirror fashion relative to the central plane which lies perpendicular to the axis of the forme cylinder (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4420971A DE4420971C1 (en) | 1994-06-16 | 1994-06-16 | Pulling method for flexible printing block onto press cylinder |
| DE4420971 | 1994-06-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0687562A2 EP0687562A2 (en) | 1995-12-20 |
| EP0687562A3 EP0687562A3 (en) | 1996-11-13 |
| EP0687562B1 true EP0687562B1 (en) | 1999-01-27 |
Family
ID=6520687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95107166A Expired - Lifetime EP0687562B1 (en) | 1994-06-16 | 1995-05-11 | Method and apparatus for mounting flexible printing plates |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0687562B1 (en) |
| AT (1) | ATE176199T1 (en) |
| DE (2) | DE4420971C1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19511075A1 (en) * | 1995-03-25 | 1996-09-26 | Roland Man Druckmasch | Method and device for mounting flexible printing forms |
| EP2535188B1 (en) * | 2011-06-17 | 2013-12-25 | Lehner GmbH | Mounting device, printer and method for applying a print form to a carrier |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2461376A (en) * | 1947-05-28 | 1949-02-08 | Blaw Knox Co | Sheet stretching mechanism |
| US4470589A (en) * | 1982-09-30 | 1984-09-11 | Karl Singer | Method and apparatus for feeding and laminating sheets |
| US5070785A (en) * | 1989-06-14 | 1991-12-10 | De La Rue Giori S.A. | Device for tensioning printing plates mounted on a cylinder of an intaglio printing machine |
| DE4218602C2 (en) * | 1991-08-28 | 1993-11-11 | Heidelberger Druckmasch Ag | Device for inserting the pressure plate trailing edge on a plate cylinder |
| DE4130805C2 (en) * | 1991-09-17 | 1994-01-27 | Koenig & Bauer Ag | Device on a cylinder for sheet-fed rotary printing machines |
| DE4214207C1 (en) * | 1992-04-30 | 1993-07-22 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De |
-
1994
- 1994-06-16 DE DE4420971A patent/DE4420971C1/en not_active Expired - Fee Related
-
1995
- 1995-05-11 DE DE59504955T patent/DE59504955D1/en not_active Expired - Fee Related
- 1995-05-11 AT AT95107166T patent/ATE176199T1/en not_active IP Right Cessation
- 1995-05-11 EP EP95107166A patent/EP0687562B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0687562A2 (en) | 1995-12-20 |
| DE59504955D1 (en) | 1999-03-11 |
| EP0687562A3 (en) | 1996-11-13 |
| DE4420971C1 (en) | 1995-07-20 |
| ATE176199T1 (en) | 1999-02-15 |
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