EP0990518B1 - Cylinder of a printing press, especially impression cylinder for a rotary sheet-fed printing press - Google Patents
Cylinder of a printing press, especially impression cylinder for a rotary sheet-fed printing press Download PDFInfo
- Publication number
- EP0990518B1 EP0990518B1 EP99119228A EP99119228A EP0990518B1 EP 0990518 B1 EP0990518 B1 EP 0990518B1 EP 99119228 A EP99119228 A EP 99119228A EP 99119228 A EP99119228 A EP 99119228A EP 0990518 B1 EP0990518 B1 EP 0990518B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- recesses
- covering element
- impression cylinder
- suction
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H45/00—Folding thin material
- B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/18—Impression cylinders
-
- 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
- B41F21/10—Combinations of transfer drums and grippers
- B41F21/102—Combinations of transfer drums and grippers with pneumatic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
Definitions
- the invention relates to a Impression cylinder for a sheet-fed rotary printing press and a method for Production of such a printing press cylinder.
- a transfer cylinder for a Sheet-fed rotary printing machine is known, the one formed from four support disks Has cylinder body on which a total of three support elements are attached. each the support elements have a sandwich-like structure, in the middle of which suction chambers be defined by a meandering bent sheet metal, which to the outside of the cylinder through a thin-walled and corresponding to the cylinder curvature curved jacket sheet is covered.
- Each of the chambers is assigned via Openings in the casing sheet are connected to the environment in terms of flow and can be via a rotary valve can be supplied with suction air in order to form an arc on the Suction and smooth the peripheral surface of the cylinder. Because of education of the chambers used thin-walled corrugated sheet and the associated Sandwich-like structure of the cylinder is not suitable for use as Impression cylinder in a printing unit of a sheet-fed rotary printing press.
- EP 0 165 477 B1 describes a sheet-fed rotary printing press with a Known turning device, which one upstream of the turning device Counter-pressure cylinder on which the sheet to be turned sucked and being held.
- the impression cylinder has a solid base, in which suction air or axially extending over the entire cylinder width Blown air supply channels are incorporated. Extends from each of the feed channels a plurality of radially extending holes to the peripheral surface of the Cylinder body. On the peripheral surface of the cylinder body is still a structural film is applied, which is porous in the region of the radially running bores is or has openings through which a transported on the cylinder Bow sucked against the peripheral surface or can be lifted from this.
- JP-A-09/123395 discloses an impression cylinder for a sheet-fed printing machine with a cylinder body with a variety of suction holes on its peripheral surface a porous film is applied.
- the object of the invention is to be achieved an impression cylinder for a sheet-fed rotary printing press create which is easy and inexpensive to manufacture and which one Suction, as well as blowing off sheets guided on the cylinder.
- an object of the invention to provide a manufacturing method with which an impression cylinder one Sheet-fed rotary printing press, the one with blowing or suction openings Has peripheral surface, can be manufactured in a simple and inexpensive manner.
- impression cylinder according to the invention and the method according to the invention for the production of such are based on preferred Embodiments described with reference to the drawings.
- the printing press cylinder 1 shown schematically in FIG. 1, the as a cooperating with an associated blanket cylinder 2 Impression cylinder used in a printing unit 4 of a sheet-fed rotary printing press comprises a base body 8, which in the preferred embodiment of the Invention as a casting provided with cavities 6 and ribs 10, for example made of Gray cast iron, etc. is formed.
- the impression cylinder 1 according to the invention preferably in one Turning device 12 upstream printing unit 4 used.
- the turning device 12 is in Fig. 1 schematically by an unspecified suction pad and a Takeover gripper having reversing drum 14 indicated
- the impression cylinder 1 shown in FIGS. 2 to 4 are in the base body 8 Recesses 20 are incorporated, for example after casting the base body 8 can be milled into the same during rough machining.
- the recesses 20 define air distribution chambers 26, which have a Air supply line 28 with a blowing or suction air source, not shown are connectable, the flow connection between blown air or Suction air source and the air distribution chambers 26 preferably via one or more, in Fig. 1 schematically shown as a block valves 30 and a control device 32 in Form of a known rotary union or a rotary valve can be done.
- the circumferential surface of the cylinder base body 8 is the same applied a solid jacket body 17, for. B. axially slid on can have a thickness in the range of 10 mm, for example, and in the range of the recesses 20 through channels 24 are formed, the blowing suction areas or Define sections 22 on the peripheral surface 18 of the cylinder.
- each of the Through channels 24 one from the center of the cylinder in the Sheath body 17 introduced channel section 24a of larger diameter, as well as several arranged above and communicating with section 24a Sections 24b with a much smaller diameter.
- the diameter the channel sections 24a can for example be in the range between 0.5 mm and 1.5 mm, whereas the diameter of the channel portions 24b is in the range of Can be 0.05 to 0.2 mm.
- Printing press cylinder 1 can be on the outer peripheral surface of the jacket body 17th a porous film 34 may be applied in which the channel sections are smaller Diameter 24b, e.g. B. are formed by a laser or by etching, etc.
- porous Structural foils e.g. B. in the form of glass bead cloths or so-called Chrome structure elevators are known for example from EP 0 165 477.
- the slide 34 can, for example, be clamped on the peripheral surface 18 of the jacket body 17 or but also be glued on and is used when using an inventive Cylinder 1 acting as a counter-pressure cylinder in the pressure gap in the area of Distribute through channels 24 evenly to prevent the occurrence of imprints to avoid the channels 24 in the printed image.
- the channel sections 24a of the through channels 24 one towards the air distribution chamber 26 have a widening cross section in the area of the air distribution chambers 26 for example double the cross section at the opposite end of the Through channels can be 24. This results in the case of suction air operation of the printing press cylinder 1 compared to a considerably reduced susceptibility to failure Constipation, which e.g. B. by penetrating into the through channels 24 paper dust or can be brought about by other particles.
- the production of the casing body 17 with the through channels 24 arranged therein is advantageously carried out independently of the machining of the cylinder base body 8.
- the multiplicity of the circumferential surface 18 of the casing body 17 Through channels to be introduced 24 z. B. with the help of suitable tools such as Drill batteries or laser machining tools take place, which results in manufacturing technology result in considerable advantages. So it comes as a result of separate processing, for example when a drilling tool breaks when drilling the Through channels 24 do not damage the considerably more expensive manufacturing cylinder body 8, as z. B. in the manufacture of Printing machine cylinders according to the prior art is the case in which the channels usually directly into the peripheral surface of the one-piece formed Cylinder body are introduced. Furthermore, the processing time by separate processing of jacket body 17 and cylinder base body 8 considerably reduced, because part of the one-piece cylinders to be carried out one after the other Processing steps now simultaneously on different processing devices can be carried out.
- the cylinder jacket body in the manner described above preferably by Machining a flat metal plate was made, this is on the Circumferential surface of the roughly pre-machined cylinder body 8 applied and on this z. B. by screwing from the inside or by gluing or welding attached.
- the jacket body 17 z. B. by a plastic deformation process previously with one of the curvature of the Outer peripheral surface of the cylinder base body 8 corresponding permanent curvature is provided so that the jacket body 17 is essentially stress-free on the Cylinder base body 8 is held.
- the Sheath body 17 previously provided with a greater curvature than the cylinder curvature is, so that after application to the cylinder body 8 in the Is biased outside.
- the blowing-suction sections 22 have the shape of strips. in this connection are preferably separated along one of the groove-shaped recesses 20a Air distribution chambers 26 which can be acted upon from one another with blown air or suction air arranged.
- the grooves 20a can be both in the circumferential direction and in the axial Extend direction along the peripheral surface 18 of the press cylinder 1.
- the blow suction sections 22 are on the Circumferential surface 18 of the cylinder 1 is preferably arranged in rows 40, which are both in the circumferential direction and in the axial direction via the Can extend circumferential surface 18.
- the rows 40 are substantially V-shaped or radiating on the Circumferential surface 18 of the cylinder 1 run. This can be achieved, for example be that the axially extending rows 40 a - in the direction of rotation 42nd of the cylinder 1 seen - have decreasing length, which in the case of small-sized sheet 16a only that in the area of the sheet trailing edge 44a in the middle the blowing - suction sections 22 of the peripheral surface 18 of the cylinder 1 suck in small-format sheet 16a.
- the Blow - suction sections 22 of the axially extending rows 40, or their Air distribution chambers 26 preferably in groups with blown air or suction air acted upon, the application depending on the to be processed Sheet format takes place in such a way that only those conveyed below one on the cylinder Blows air or suction air are applied to sections 16 located on the arc 16.
- the control device 32 preferably all sections 22 or their Air distribution chambers 26 via the control device 32 in the form of a known one Rotary union at the same time as the suction air or blast air source via the Valve block 30 connected.
- the rows 40 of blow suction sections 22 of a certain predetermined angle of rotation position progressively with blowing air or Blowing air blasts are applied to the sheet 16 from the peripheral surface 18th detach or to clean the channels 24 of impurities.
- an impression cylinder in a printing unit upstream of a turning device turned out to be advantageous, arranged along an axial row 40 Sections 22, or their manifold chambers 26 in the area between the pressure gap and the transfer centers 46 to the downstream turning drum 14 (FIG. 1) with suction air act and the corresponding axial rows 40 below the Trailing edge 44a, 44b only immediately before, or immediately after, the grasping Trailing edge 44a, 44b by a gripper device of the turning drum 14 To apply blown air to the sheet 16 sucked on the peripheral surface 18 detach from this.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Rotary Presses (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
Die Erfindung betrifft einen Gegendruckzylinder für eine Bogenrotationsdruckmaschine sowie ein Verfahren zur Herstellung eines solchen Druckmaschinenzylinders.The invention relates to a Impression cylinder for a sheet-fed rotary printing press and a method for Production of such a printing press cylinder.
Beim Transport von Bogen durch eine Bogenrotationsdruckmaschine werden diese in bekannter Weise in einem zwischen einem Gegendruckzylinder und einem zugeordneten Gummituchzylinder gebildeten Druckspalt bedruckt und dann mittels einem oder mehreren Überführzylindern einem nachgeordneten Druckwerk oder einer Wendeeinrichtung zugeführt. Um ein Abschmieren der frischbedruckten Bogenseite auf den Überführzylindern zu vermeiden, ist es bekannt, in der Umfangsoberfläche der Zylinder Öffnungen vorzusehen, durch welche hindurch Blasluft geblasen wird, die den Bogen abschmierfrei auf der Umfangsoberfläche der Überführzylinder trägt.When sheets are transported through a sheet-fed rotary printing press, they are known manner in a between an impression cylinder and an associated Blanket cylinder formed printing gap printed and then by means of one or more Transfer cylinders a downstream printing unit or a turning device fed. To smear the freshly printed sheet side on the To avoid transfer cylinders, it is known in the peripheral surface of the cylinder Provide openings through which blown air is blown through the arc lubrication-free on the peripheral surface of the transfer cylinder.
Sowohl bei den oben beschriebenen Bogenüberführungszylindern als auch bei Gegendruckzylindern von Bogenrotationsdruckmaschinen, die einer Wendeeinrichtung zugeordnet sind, und bei denen die Bogen im Schön- und Widerdruckbetrieb auf dem vorgeordneten Gegendruckzylinder geführt und die Hinterkante der Bogen durch eine Greifereinrichtung des nachgeordneten Überführungszylinders übernommen wird, ist es bekannt, den Bogen auf der Umfangsoberfläche des Zylinders anzusaugen, um diesen auf der Umfangsoberfläche zu halten.Both in the sheet transfer cylinders described above and at Counter-pressure cylinders of sheet-fed rotary printing presses that have a turning device are assigned, and in which the sheets in perfecting on the upstream impression cylinder and the rear edge of the sheet through a Gripper device of the subordinate transfer cylinder is taken over, it is known to suck the sheet on the circumferential surface of the cylinder to this to keep the peripheral surface.
Aus der DE-OS 41 26 643 A1 ist ein Überführungszylinder für eine Bogenrotationsdruckmaschine bekannt, der einen aus vier Tragscheiben gebildeten Zylindergrundkörper aufweist, auf dem insgesamt drei Tragelemente befestigt sind. Jedes der Tragelemente besitzt einen sandwichartigen Aufbau, in dessen Mitte Saugkammern durch ein meanderförmig gebogenes Faltenblech definiert werden, welches zur Außenseite des Zylinders hin durch ein dünnwandiges und entsprechend der Zylinderkrümmung gebogenes Mantelblech abgedeckt wird. Jede der Kammern ist über zugeordnete Öffnungen im Mantelblech strömungsmäßig mit der Umgebung verbunden und kann über ein Drehventil mit Saugluft beaufschlagt werden, um einen Bogen auf der Umfangsoberfläche des Zylinders anzusaugen und zu glätten. Aufgrund des zur Bildung der Kammern eingesetzten dünnwandigen Faltenblechs und des damit verbundenen sandwichartigen Aufbaus des Zylinders eignet sich dieser nicht zum Einsatz als Gegendruckzylinder in einem Druckwerk einer Bogenrotationsdruckmaschine.From DE-OS 41 26 643 A1 is a transfer cylinder for a Sheet-fed rotary printing machine is known, the one formed from four support disks Has cylinder body on which a total of three support elements are attached. each the support elements have a sandwich-like structure, in the middle of which suction chambers be defined by a meandering bent sheet metal, which to the outside of the cylinder through a thin-walled and corresponding to the cylinder curvature curved jacket sheet is covered. Each of the chambers is assigned via Openings in the casing sheet are connected to the environment in terms of flow and can be via a rotary valve can be supplied with suction air in order to form an arc on the Suction and smooth the peripheral surface of the cylinder. Because of education of the chambers used thin-walled corrugated sheet and the associated Sandwich-like structure of the cylinder is not suitable for use as Impression cylinder in a printing unit of a sheet-fed rotary printing press.
Aus der EP 0 165 477 B1 ist eine Bogenrotationsdruckmaschine mit einer Wendeeinrichtung bekannt, welche einen der Wendeeinrichtung vorgeordneten Gegendruckzylinder aufweist, auf welchem die zu wendenden Bogen angesogen und gehalten werden. Der Gegendruckzylinder weist einen massiven Grundkörper auf, in welchem axial über die gesamte Zylinderbreite verlaufende Saugluft- oder Blasluftzufuhrkanäle eingearbeitet sind. Von jedem der Zufuhrkanäle aus erstreckt sich eine Vielzahl von radial verlaufenden Bohrungen zur Umfangsoberfläche des Zylindergrundkörpers. Auf die Umfangsoberfläche des Zylindergrundkörpers ist weiterhin eine Strukturfolie aufgezogen, welche im Bereich der radial verlaufenden Bohrungen porös ist oder Öffnungen aufweist, durch welche hindurch ein auf dem Zylinder transportierter Bogen gegen die Umfangsoberfläche gesaugt bzw. von dieser abgehoben werden kann. Aus der Schrift ist es weiterhin bekannt, einen als Speichertrommel ausgebildeten und mit einer porösen Folie überzogenen Überführzylinder mit einem zur Anpassung an unterschiedliche Bogenformate verfahrbaren Saugkasten zu versehen, welcher die Hinterkante eines zu wendenden Bogens auf der Umfangsoberfläche des Überführzylinders ansaugt. Aufgrund der sich in axialer Richtung über die gesamte Breite des Gegendruckzylinders erstreckenden Zufuhrbohrungen sowie die in der Umfangsoberfläche des Grundkörpers des Gegendruckzylinders einzubringenden zahlreichen feinen radial verlaufenden Bohrungen erweist sich die Fertigung des beschriebenen Gegendruckzylinders als außerordentlich aufwendig und kostenintensiv..EP 0 165 477 B1 describes a sheet-fed rotary printing press with a Known turning device, which one upstream of the turning device Counter-pressure cylinder on which the sheet to be turned sucked and being held. The impression cylinder has a solid base, in which suction air or axially extending over the entire cylinder width Blown air supply channels are incorporated. Extends from each of the feed channels a plurality of radially extending holes to the peripheral surface of the Cylinder body. On the peripheral surface of the cylinder body is still a structural film is applied, which is porous in the region of the radially running bores is or has openings through which a transported on the cylinder Bow sucked against the peripheral surface or can be lifted from this. From the document it is also known to be designed as a storage drum and with a porous film covered transfer cylinder with one to adapt to to provide different sheet formats movable suction box, which the Trailing edge of a sheet to be turned on the peripheral surface of the transfer cylinder sucks. Due to the fact that in the axial direction over the entire width of the Counter pressure cylinder extending supply holes and those in the peripheral surface of the base body of the impression cylinder numerous fine radial to be introduced running holes proves the manufacture of the described Impression cylinder as extraordinarily complex and costly ..
Infolge der mit der Verfahrbarkeit der Saugkästen verbundenen kamm- oder fingerartigen Ausgestaltung der Umfangsoberfläche des Überführzylinders eignet sich dieser ebenfalls nicht zum Einsatz als Gegendruckzylinder in einer Bogenrotationsdruckmaschine, da sich die kammartige Struktur der Umfangsoberfläche auf das Druckbild überträgt und dieses nachhaltig beeinträchtigt.As a result of the comb-like or finger-like connection associated with the movability of the suction boxes Design of the peripheral surface of the transfer cylinder is also suitable not for use as an impression cylinder in a sheet-fed rotary printing press, because transfers the comb-like structure of the peripheral surface to the printed image and this permanently impaired.
JP-A-09/123395 offenbart einen Gegendruckzylinder für eine Bogendruckmaschine mit einem Zylindergrundkörper mit einer Vielzahl von Sauglöchern, auf dessen Umfangsfläche eine poröse Folie aufgebracht ist.JP-A-09/123395 discloses an impression cylinder for a sheet-fed printing machine with a cylinder body with a variety of suction holes on its peripheral surface a porous film is applied.
Durch die Erfindung soll die Aufgabe gelöst werden, einen Gegendruckzylinder für eine Bogenrotationsdruckmaschine zu schaffen, welcher einfach und kostengünstig zu fertigen ist und welcher sowohl ein Ansaugen, als auch eine Abblasen von auf dem Zylinder geführten Bogen ermöglicht.The object of the invention is to be achieved an impression cylinder for a sheet-fed rotary printing press create which is easy and inexpensive to manufacture and which one Suction, as well as blowing off sheets guided on the cylinder.
Weiterhin ist es eine Aufgabe der Erfindung, ein Herstellverfahren zu schaffen, mit welchem sich ein Gegendruckzylinder einer Bogenrotationsdruckmaschine, der eine mit Blas- oder Saugöffnungen versehene Umfangsoberfläche aufweist, in einfacher und kostengünstigerer Weise fertigen läßt.Furthermore, it is an object of the invention to provide a manufacturing method with which an impression cylinder one Sheet-fed rotary printing press, the one with blowing or suction openings Has peripheral surface, can be manufactured in a simple and inexpensive manner.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale von
Anspruch 1, 2, 20 und 21 gelöst.This object is achieved by the features of
Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.
Der erfindungsgemäße Gegendruckzylinder sowie das erfindungsgemäße Verfahren zur Herstellung eines solchen werden nachfolgend anhand von bevorzugten Ausführungsformen mit Bezug auf die Zeichnungen beschrieben.The impression cylinder according to the invention and the method according to the invention for the production of such are based on preferred Embodiments described with reference to the drawings.
In den Zeichnungen zeigen
- Fig. 1
- einen erfindungsgemäßen Gegendruckzylinder, der einer Wendeeinrichtung einer Bogenrotationsdruckmaschine vorgeordnet ist,
- Fig. 2
- eine schematische Schnittansicht der Mantelfläche eines erfindungsgemäßen Druckmaschinenzylinders gemäß einer ersten Ausführungsform, bei der sowohl die Durchgangskanäle als auch die oberhalb von diesen angeordneten feinen Öffnungen unmittelbar im Mantelkörper des Zylinders ausgebildet sind,
- Fig. 3
- eine schematische Schnittansicht einer weiteren Ausführungsform eines erfindungsgemäßen Druckmaschinenzylinders, bei der die Durchgangskanäle im Mantelkörper des Druckmaschinenzylinders ausgebildet sind und durch eine auf die Umfangsoberfläche des Mantelkörpers aufgespannte poröse Folie abgedeckt werden,
- Fig. 4
- eine vergrößerte Querschnittsansicht einer weiteren Ausführungsform eines erfindungsgemäßen Druckmaschinenzylinders, bei dem die Durchgangskanäle im Mantelkörper einen sich zum Zylinderzentrum hin erweiternden Querschnitt aufweisen,
- Fig. 5
- eine schematische Darstellung einer Ausführungsform eines erfindungsgemäßen Druckmaschinenzylinders, bei der die Blas- Saug-Bereiche reihenförmig auf der Umfangsoberfläche des Zylinders angeordnet sind und
- Fig. 1
- an impression cylinder according to the invention, which is arranged upstream of a turning device of a sheet-fed rotary printing press,
- Fig. 2
- 2 shows a schematic sectional view of the lateral surface of a printing press cylinder according to the invention in accordance with a first embodiment, in which both the through-channels and the fine openings arranged above them are formed directly in the jacket body of the cylinder,
- Fig. 3
- 2 shows a schematic sectional view of a further embodiment of a printing press cylinder according to the invention, in which the through-channels are formed in the casing body of the printing press cylinder and are covered by a porous film stretched onto the peripheral surface of the casing body,
- Fig. 4
- 3 shows an enlarged cross-sectional view of a further embodiment of a printing press cylinder according to the invention, in which the through-channels in the jacket body have a cross section which widens towards the cylinder center,
- Fig. 5
- is a schematic representation of an embodiment of a printing press cylinder according to the invention, in which the blow-suction areas are arranged in rows on the circumferential surface of the cylinder and
Der in Fig. 1 schematisch dargestellte Druckmaschinenzylinder 1, der
als ein mit einem zugeordneten Gummituchzylinder 2 zusammenwirkender
Gegendruckzylinder in einem Druckwerk 4 einer Bogenrotationsdruckmaschine eingesetzt
wird, umfaßt einen Grundkörper 8, der bei der bevorzugten Ausführungsform der
Erfindung als ein mit Hohlräumen 6 und Rippen 10 versehenes Gußteil, beispielsweise aus
Grauguß etc., ausgebildet ist. Wie in Fig. 1 weiterhin dargestellt ist, wird der
erfindungsgemäße Gegendruckzylinder 1 vorzugsweise in einem einer
Wendeeinrichtung 12 vorgeordneten Druckwerk 4 eingesetzt. Die Wendeeinrichtung 12 ist
in Fig. 1 schematisch durch eine einen nicht näher bezeichneten Sauggreifer sowie einen
Übernahmegreifer aufweisende Wendetrommel 14 angedeutetThe
Wie in den vergrößerten Schnittansichten durch den Grundkörper 8 des erfindungsgemäßen
Gegendruckzylinders 1 in Fig. 2 bis 4 dargestellt ist, sind in den Grundkörper 8
Ausnehmungen 20 eingearbeitet, die beispielsweise nach dem Gießen des Grundkörpers 8
im Rahmen einer Grobbearbeitung desselben in diesen eingefräst sein können.As in the enlarged sectional views through the base body 8 of the invention
The
Die Ausnehmungen 20 definieren Luftverteilerkammern 26, die über eine
Luftzufuhrleitung 28 mit einer nicht näher dargestellten Blas- oder Saugluftquelle
verbindbar sind, wobei die strömungsmäßige Verbindung zwischen Blasluft- oder
Saugluftquelle und den Luftverteilerkammern 26 vorzugsweise über ein oder mehrere, in
Fig. 1 schematisch als Block dargestellte Ventile 30 sowie eine Steuereinrichtung 32 in
Form einer bekannten Drehdurchführung oder eines Drehventils erfolgen kann.The recesses 20 define
Auf die Umfangsoberfläche des Zylindergrundkörpers 8 wird nach der Bearbeitung
desselben ein massiver Mantelkörper 17 aufgebracht, z. B. axial aufgeschoben, der
beispielsweise eine Dicke im Bereich von 10 mm aufweisen kann, und in dem im Bereich
der Ausnehmungen 20 Durchgangskanäle 24 gebildet sind, die Blas- Saugbereiche oder
Abschnitte 22 auf der Umfangsoberfläche 18 des Zylinders definieren.After machining, the circumferential surface of the cylinder base body 8 is
the same applied a
Bei der in Fig. 2 dargestellten Ausführungsform der Erfindung weist jeder der
Durchgangskanäle 24 einen vom Zentrum des Zylinders her in den
Mantelkörper 17 eingebrachten Kanalabschnitt 24a größeren Durchmessers, sowie mehrere
darüber angeordnete und mit dem Abschnitt 24a kommunizierende
Abschnitte 24b mit einem um ein Vielfaches kleineren Durchmesser auf. Der Durchmesser
der Kanalabschnitte 24a kann beispielsweise im Bereich zwischen 0,5 mm
und 1,5 mm liegen, wohingegen der Durchmesser der Kanalabschnitte 24b im Bereich von
0,05 bis 0,2 mm liegen kann.In the embodiment of the invention shown in FIG. 2, each of the
Gemäß der in Fig. 3 dargestellten weiteren Ausführungsform eines erfindungsgemäßen
Druckmaschinenzylinders 1 kann auf die Außenumfangsoberfläche des Mantelkörpers 17
eine poröse Folie 34 aufgebracht sein, in der die Kanalabschnitte kleineren
Durchmessers 24b, z. B. durch einen Laser oder durch Ätzen etc. gebildet sind. Poröse
Strukturfolien, z. B. in Form von Glasperlentüchern oder sogenannten
Chromstrukturaufzügen sind beispielsweise aus der EP 0 165 477 bekannt. Die Folie 34
kann beispielsweise auf die Umfangsoberfläche 18 des Mantelkörpers 17 aufgespannt oder
aber auch aufgeklebt sein und dient dazu, die beim Einsatz eines erfindungsgemäßen
Zylinders 1 als Gegendruckzylinder im Druckspalt wirkenden Druckkräfte im Bereich der
Durchgangskanäle 24 gleichmäßig zu verteilen, um das Auftreten von Abdrücken durch
die Kanäle 24 im gedruckten Bild zu vermeiden.According to the further embodiment of an inventive device shown in FIG. 3
Wie in Fig. 4 anhand der ebenfalls eine poröse Folie 34 verwendenden Ausführungsform
der Erfindung gezeigt ist, kann es weiterhin vorgesehen sein, daß die Kanalabschnitte 24a
der Durchgangskanäle 24 eine sich in Richtung zur Luftverteilerkammer 26 hin
erweiternden Querschnitt aufweisen, der im Bereich der Luftverteilerkammern 26
beispielsweise das Doppelte des Querschnitts am gegenüberliegenden Ende der
Durchgangskanäle 24 betragen kann. Hierdurch ergibt sich im Falle des Saugluftbetriebes
des Druckmaschinenzylinders 1 eine erheblich verringerte Störanfälligkeit gegenüber
Verstopfungen, welche z. B. durch in die Durchgangskanäle 24 eindringenden Papierstaub
oder durch sonstige Partikel herbeigeführt werden können.As in FIG. 4 based on the embodiment also using a
Die Herstellung des Mantelkörpers 17 mit den darin angeordneten Durchgangskanälen 24
erfolgt vorteilhafter Weise unabhängig von der Bearbeitung des Zylindergrundkörpers 8.
Hierdurch kann die Vielzahl der in die Umfangsoberfläche 18 des Mantelkörpers 17
einzubringenden Durchgangskanäle 24 z. B. mit Hilfe von geeigneten Werkzeugen wie
Bohrerbatterien oder Laserbearbeitungswerkzeugen erfolgen, wodurch sich in
fertigungstechnischer Hinsicht erhebliche Vorteile ergeben. So kommt es infolge der
getrennten Bearbeitung beispielsweise beim Bruch eines Bohrwerkzeuges beim Bohren der
Durchgangskanäle 24 nicht zu einer Beschädigung des erheblich aufwendiger zu
fertigenden Zylindergrundkörpers 8, wie dies z. B. bei der Herstellung von
Druckmaschinenzylindern nach dem Stand der Technik der Fall ist, bei denen die Kanäle
in der Regel direkt in die Umfangsoberfläche des in einem Stück ausgebildeten
Zylinderkörpers eingebracht werden. Desweiteren wird die Bearbeitungszeit durch die
separate Bearbeitung von Mantelkörper 17 und Zylindergrundkörper 8 erheblich reduziert,
da ein Teil der bei einteiligen Zylindern nacheinander vorzunehmenden
Bearbeitungsschritte nunmehr gleichzeitig auf verschiedenen Bearbeitungseinrichtungen
durchgeführt werden können.The production of the
Nachdem der Zylindermantelkörper in der zuvor beschriebenen Weise, vorzugsweise durch
Bearbeiten einer ebenen Metallplatte gefertigt wurde, wird dieser auf die
Umfangsoberfläche des grob vorbearbeiteten Zylindergrundkörpers 8 aufgebracht und auf
dieser z. B. durch Verschrauben von innen her oder durch Verkleben oder Verschweißen
befestigt. Hierbei kann es vorgesehen sein, daß der Mantelkörper 17 z. B. durch ein
plastisches Verformungsverfahren zuvor mit einer der Krümmung der
Außenumfangsfläche des Zylindergrundkörpers 8 entsprechenden dauerhaften Krümmung
versehen wird, so daß der Mantelkörper 17 im wesentlichen spannungsfrei auf dem
Zylindergrundkörper 8 gehalten wird. Auch kann es vorgesehen sein, daß der
Mantelkörper 17 zuvor mit einer stärkeren Krümmung als der Zylinderkrümmung versehen
wird, so daß er nach dem Aufbringen auf den Zylindergrundkörper 8 in den
Außenbereichen vorgespannt ist.After the cylinder jacket body in the manner described above, preferably by
Machining a flat metal plate was made, this is on the
Circumferential surface of the roughly pre-machined cylinder body 8 applied and on
this z. B. by screwing from the inside or by gluing or welding
attached. It can be provided that the jacket body 17 z. B. by a
plastic deformation process previously with one of the curvature of the
Outer peripheral surface of the cylinder base body 8 corresponding permanent curvature
is provided so that the
In einem weiteren Schritt kann dann gegebenenfalls eine Feinbearbeitung der
Umfangsoberfläche des auf den Zylindergrundkörper 8 aufgebrachten Mantelkörpers 17
erfolgen, wodurch Unrundheiten des Zylinders, die in der Regel zu einer nachteiligen
Beeinträchtigung des Druckbildes führen, beseitigt werden.In a further step, a fine machining of the
Circumferential surface of the
Wie in Fig. 5 dargestellt ist, sind bei der bevorzugten Ausführungsform der Erfindung die
Ausnehmungen 20 in der Umfangsoberfläche des Zylindergrundkörpers 8 als Nuten 20a
ausgebildet, wobei die Blas- Saug- Abschnitte 22 die Form von Leisten besitzen. Hierbei
sind entlang einer der nutenförmigen Ausnehmungen 20a vorzugsweise mehrere getrennt
voneinander mit Blasluft oder Saugluft beaufschlagbare Luftverteilerkammern 26
angeordnet. Die Nuten 20a können sich sowohl in Umfangsrichtung als auch in axialer
Richtung entlang der Umfangsoberfläche 18 des Druckmaschinenzylinders 1 erstrecken.
Wie in Fig. 5 weiterhin gezeigt ist, sind die Blas - Saug - Abschnitte 22 auf der
Umfangsoberfläche 18 des Zylinders 1 vorzugsweise in Reihen 40 angeordnet, welche sich
sowohl in Umfangsrichtung als auch in axialer Richtung über die
Umfangsoberfläche 18 erstrecken können. In gleicher Weise kann es jedoch auch
vorgesehen sein, daß die Reihen 40 im wesentlichen V-förmig oder strahlenförmig auf der
Umfangsoberfläche 18 des Zylinders 1 verlaufen. Dies kann beispielsweise dadurch erzielt
werden, daß die sich in axialer Richtung erstreckenden Reihen 40 eine - in Drehrichtung 42
des Zylinders 1 gesehen - abnehmende Länge aufweisen, wodurch im Falle von
kleinformatigen Bogen 16a lediglich die im Bereich der Bogenhinterkante 44a in der Mitte
der Umfangsoberfläche 18 des Zylinders 1 gelegenen Blas - Saug - Abschnitte 22 den
kleinformatigen Bogen 16a ansaugen. Bei der Verarbeitung von großformatigen
Bogen 16b, welche in der Regel ein höheres Gewicht aufweisen und damit einer größeren
Fliehkraftwirkung unterliegen, werden hingegen vorzugsweise sämtliche Blas- Saug -
Abschnitte 22 auf der Umfangsoberfläche 18 zur Beaufschlagung der Bogen 16 mit
Saugluft oder Blasluft aktiviert, so daß großformatige Bogen 16b über nahezu ihre gesamte
Fläche hinweg und nicht nur im Bereich ihrer Bogenhinterkante 44b auf der
Umfangsoberfläche 18 gehalten werden.As shown in Fig. 5, in the preferred embodiment of the invention
Recesses 20 in the peripheral surface of the cylinder base body 8 as grooves 20a
formed, the blowing-
Wie durch die Ventile des Ventilblocks 30 in Fig. 5 angedeutet ist, sind die
Blas - Saug - Abschnitte 22 der axial verlaufenden Reihen 40, oder deren
Luftverteilerkammern 26 vorzugsweise in Gruppen mit Blasluft oder Saugluft
beaufschlagbar, wobei die Beaufschlagung in Abhängigkeit vom zu verarbeitenden
Bogenformat erfolgt, derart, daß lediglich die unterhalb eines auf dem Zylinder geförderten
Bogens 16 gelegenen Abschnitte 22 mit Blasluft oder Saugluft beaufschlagt werden. Bei
dieser Ausführungsform der Erfindung werden vorzugsweise alle Abschnitte 22 bzw. deren
Luftverteilerkammern 26 über die Steuereinrichtung 32 in Form einer bekannten
Drehdurchführung gleichzeitig mit der Saugluft- oder Blasluftquelle über den
Ventilblock 30 verbunden.As indicated by the valves of the
In gleicher Weise kann es vorgesehen sein, daß die axialen Reihen 40 in Umfangsrichtung
betrachtet über die Steuereinrichtung 32 nach dem Passieren des Druckspalts oder kurz
zuvor fortschreitend mit Saugluft beaufschlagt werden, so daß die transportierten Bogen 16
fortschreitend auf der Umfangsoberfläche 18 des Zylinders 1 angesogen und geglättet
werden. In gleicher Weise können die Reihen 40 von Blas - Saug - Abschnitten 22 von
einer bestimmten vorgegebenen Drehwinkelposition an fortschreitend mit Blasluft oder
Blasluftstößen beaufschlagt werden, um die Bogen 16 von der Umfangsoberfläche 18
abzulösen oder die Kanäle 24 von Verunreinigungen zu reinigen.In the same way it can be provided that the
Insbesondere beim Einsatz des erfindungsgemäßen
Gegendruckzylinders in einem einer Wendeeinrichtung vorgeordneten Druckwerk hat es
sich als vorteilhaft herausgestellt, die entlang einer axialen Reihe 40 angeordneten
Abschnitte 22, bzw. deren Verteilerkammem 26 im Bereich zwischen dem Druckspalt und
der Übergabezentralen 46 zur nachgeordneten Wendetrommel 14 (Fig. 1) mit Saugluft zu
beaufschlagen und die entsprechenden axialen Reihen 40 unterhalb der
Bogenhinterkante 44a, 44b erst unmittelbar vor, bzw. unmittelbar nach dem Ergreifen der
Bogenhinterkante 44a, 44b durch eine Greifereinrichtung der Wendetrommel 14 mit
Blasluft zu beaufschlagen, um den auf der Umfangsoberfläche 18 angesaugten Bogen 16
von dieser abzulösen.In particular when using the invention
There is an impression cylinder in a printing unit upstream of a turning device
turned out to be advantageous, arranged along an
Weiterhin besteht die Möglichkeit, die Ausnehmungen 20 unmittelbar im
Zylindermantelkörper 17 auf dessen Innenseite auszubilden und in den
Zylindergrundkörper 8 lediglich die Saugbohrungen 28 einzubringen, wie dies in den
Figuren 2 bis 4 schematisch durch gestrichelte Linien angedeutet ist. There is also the possibility of the recesses 20 directly in the
Form
- 11
- DruckmaschinenzylinderPrinting press cylinder
- 22
- GummituchzylinderBlanket cylinder
- 44
- Druckwerkprinting unit
- 66
- Hohlraumcavity
- 88th
- Grundkörperbody
- 1010
- Rippenribs
- 1212
- Wendeeinrichtungturning device
- 1414
- Wendetrommelbeater
- 1616
- Bogenarc
- 16a16a
- kleinformatiger Bogensmall format bow
- 16b16b
- großformatiger Bogenlarge format bow
- 1717
- Mantelkörpercovering body
- 1818
- Umfangsoberflächecircumferential surface
- 2020
- Ausnehmungenrecesses
- 20a20a
- Nutengroove
- 2222
- Blas- SaugabschnitteBlow suction sections
- 2424
- DurchgangskanäleThrough channels
- 24a24a
- Kanalabschnitt größeren DurchmessersChannel section of larger diameter
- 24b24b
- Kanalabschnitt kleineren DurchmessersChannel section of smaller diameter
- 2626
- LuftverteilerkammernAir distribution chambers
- 2828
- LuftzufuhrleitungAir supply line
- 3030
- Ventilblockmanifold
- 3232
- Steuereinrichtungcontrol device
- 3434
- Foliefoil
- 4040
- Reihenstring
- 4242
-
Drehrichtung des Zylinders 1Direction of rotation of the
cylinder 1 - 44a44a
- Bogenhinterkante der kleinformatigen BogenThe trailing edge of the small format sheets
- 44b44b
- Bogenhinterkante der kleinformatigen BogenThe trailing edge of the small format sheets
- 4646
- ÜbergabezentraleTransfer center
Claims (21)
- An impression cylinder with a basic cylinder body (8) having a plurality of recesses (20) which are formed therein and which can be connected to a suction-air source or a blown-air source,
whereby a solid covering element (17) is fitted to the basic cylinder body (8) having recesses through channels (24, 24a, 24b) in the region of the recesses (20), the channels extending from the recesses (20) to the peripheral surface (18) of the covering element (17), and which define blowing/suction sections (22) which act on the underside of a sheet (16) conveyed on the peripheral surface (18) of the cylinder (1) and
whereby a porous film (34) is attached to the peripheral surface (18) of the covering element (17). - The impression cylinder for a sheet-fed rotary printing machine with a basic cylinder body (8) which is surrounded by a covering element (17) which has a large number of recesses (20) which are formed on its inside and which can be connected to a suction-air source or blown-air source and which has, in the region of the recesses (20), through channels (24, 24a, 24b) which extend from the recesses (20) to the peripheral surface of the covering element, whereby the recesses (20) define blowing/suction sections (22) which act on the underside of a sheet (16) conveyed on the peripheral surface (18) of the cylinder (1).
- The impression cylinder as claimed in claim 1 or 2,
characterized in that the through channels (24) have a section of a larger diameter (24a) and a section of a smaller diameter (24b). - The impression cylinder as claimed in claim 3,
characterized in that the section of larger diameter (24a) is designed as a hole made in the covering element (17) from the center of the cylinder (1). - The impression cylinder as claimed in one of the preceding claims,
characterized in that the blowing/suction sections (22) are arranged essentially in rows (40) on the peripheral surface (18) of the cylinder (1). - The impression cylinder as claimed in claim 5,
characterized in
characterized in that the rows (40) run essentially parallel to one another. - The impression cylinder as claimed in claim 5 or 6,
characterized in that the rows (40) run in axial direction. - The impression cylinder as claimed in claim 7,
characterized in that, as viewed in the direction of rotation (42) of the cylinder (1), the rows are of decreasing length. - The impression cylinder as claimed in one of claims 5 to 8,
characterized in that the rows (40) run in peripheral direction. - The impression cylinder as claimed in one of claims 5 to 9,
characterized in that the rows (40) run essentially in a V-shape or ray shape. - The impression cylinder as claimed in one of claims 5 to 10,
characterized in that the recesses (20) assigned to a row (40) can have suction air or blown air applied to them jointly via a connecting line (28). - The impression cylinder as claimed in one of the preceding claims,
characterized in that valves (30) are assigned to the recesses (20) via which the recesses (20) can be connected, individually or in groups, to the suction-air source or blown-air source. - The impression cylinder as claimed in claim 12,
characterized in that the application of suction air or blown air to the recesses (20) is carried out in dependence on the sheet format (16a, 16b) to be processed, in such a way that only the blowing/suction sections (22) underneath a sheet (16) conveyed on the cylinder (1) have suction air or blown air applied to them. - The impression cylinder as claimed in one of the preceding claims,
characterized in that control means (32) are provided to control the suction-air or blown-air feed to the recesses (20). - The impression cylinder as claimed in claim 14,
characterized in that all the recesses (20) can be connected simultaneously to the suction-air/blown-air source via the control means (32). - The impression cylinder as claimed in one of the preceding claims,
characterized in that the through channels (24) in the covering element (17) have a cross section which widens in the direction of the recesses (20). - The impression cylinder as claimed in one of claims 14 to
16, characterized in that this cylinder is designed as an impression cylinder arranged upstream of a turning device (12), and in that, during perfecting operation, the control means (32) connect the recesses (20) in the region between the press nip and the transfer center line (46) between the impression cylinder (1) and a downstream sheet-carrying cylinder (14) to the suction-air source, in order to hold the sheets (16) on the peripheral surface (18) of the cylinder (1). - The impression cylinder as claimed in one of claims 14 to 17,
characterized in that, during perfecting operation, the control means (32) connect the recesses (20) in a transfer region, which is directly upstream or downstream of the transfer center line (46) and in which the trailing edge (40a, 40b) of the sheet (16, 16a, 16b) is accepted by a gripper device of the downstream sheet-carrying cylinder (14), to the blown-air source. - The impression cylinder as claimed in one of claims 14 to 18,
characterized in that, as viewed in the direction of rotation (42) of the cylinder (1), during perfecting operation the control means (32) connect the recesses (20) in the region between the transfer center line (46) between the cylinder (1) and a downstream sheet-conveying cylinder (14) and the press nip to the blown-air source, in order to detach the sheets (16) from the peripheral surface (18) of the cylinder (1). - A method for producing an impression cylinder of a sheet-fed rotary printing machine with a basic cylinder body and a covering element which comprises the following method steps:providing a basic cylinder body (8),introducing recesses (20) into the peripheral surface of the basic cylinder body (8),introducing one or more air-supply holes (28) into the recesses (20),fitting a cylinder covering element (17) to the basic cylinder body, the cylinder covering element having, in the region of the recesses, a plurality of through channels (24, 24a, 24b) which extend from the recesses to the peripheral surface of the cylinder covering element andapplying a porous film (34) to the peripheral surface (18) of the cylinder covering element.
- A method for producing an impression cylinder of a sheet-fed rotary printing machine with a basic cylinder body and a covering element which comprises the following method steps:providing a basic cylinder body (8),introducing one or more air-supply holes (28) into the basic cylinder body,providing a cylinder covering element (17),introducing recesses (20) into the inside of the cylinder covering element (17),introducing a plurality of through channels (24, 24a, 24b), extending from the recesses to the peripheral surface (18) of the cylinder covering element, into the cylinder covering element (17), andfitting the cylinder covering element (17) to the basic cylinder body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19845214 | 1998-10-01 | ||
| DE19845214A DE19845214A1 (en) | 1998-10-01 | 1998-10-01 | Printing machine cylinders, in particular impression cylinders for a sheet-fed rotary machine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0990518A2 EP0990518A2 (en) | 2000-04-05 |
| EP0990518A3 EP0990518A3 (en) | 2000-11-08 |
| EP0990518B1 true EP0990518B1 (en) | 2003-04-16 |
Family
ID=7883046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99119228A Expired - Lifetime EP0990518B1 (en) | 1998-10-01 | 1999-09-28 | Cylinder of a printing press, especially impression cylinder for a rotary sheet-fed printing press |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6581517B1 (en) |
| EP (1) | EP0990518B1 (en) |
| JP (1) | JP4495278B2 (en) |
| AT (1) | ATE237472T1 (en) |
| DE (2) | DE19845214A1 (en) |
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| DE102015225605A1 (en) | 2015-12-17 | 2017-06-22 | Heidelberger Druckmaschinen Ag | Sheet transport device and method for sheet transport |
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- 1999-09-28 EP EP99119228A patent/EP0990518B1/en not_active Expired - Lifetime
- 1999-09-28 DE DE59905046T patent/DE59905046D1/en not_active Expired - Lifetime
- 1999-09-29 JP JP27685099A patent/JP4495278B2/en not_active Expired - Fee Related
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014011411A1 (en) | 2014-07-31 | 2016-02-04 | Heidelberger Druckmaschinen Ag | Sheet transport device |
| DE102014011411B4 (en) | 2014-07-31 | 2022-06-23 | Heidelberger Druckmaschinen Ag | sheet transport device |
| DE102014224833A1 (en) | 2014-12-04 | 2016-06-09 | Heidelberger Druckmaschinen Ag | suction |
| EP3042767A1 (en) | 2014-12-04 | 2016-07-13 | Heidelberger Druckmaschinen AG | Suction surface |
| DE102015225605A1 (en) | 2015-12-17 | 2017-06-22 | Heidelberger Druckmaschinen Ag | Sheet transport device and method for sheet transport |
Also Published As
| Publication number | Publication date |
|---|---|
| US6581517B1 (en) | 2003-06-24 |
| ATE237472T1 (en) | 2003-05-15 |
| EP0990518A3 (en) | 2000-11-08 |
| JP2000108299A (en) | 2000-04-18 |
| EP0990518A2 (en) | 2000-04-05 |
| DE59905046D1 (en) | 2003-05-22 |
| DE19845214A1 (en) | 2000-04-06 |
| JP4495278B2 (en) | 2010-06-30 |
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