EP0223015B1 - Printing cylinder with a filling piece in its groove - Google Patents

Printing cylinder with a filling piece in its groove Download PDF

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Publication number
EP0223015B1
EP0223015B1 EP86113159A EP86113159A EP0223015B1 EP 0223015 B1 EP0223015 B1 EP 0223015B1 EP 86113159 A EP86113159 A EP 86113159A EP 86113159 A EP86113159 A EP 86113159A EP 0223015 B1 EP0223015 B1 EP 0223015B1
Authority
EP
European Patent Office
Prior art keywords
groove
filling piece
printing unit
cylinder
unit cylinder
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
EP86113159A
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German (de)
French (fr)
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EP0223015A2 (en
EP0223015A3 (en
Inventor
Reinhard Zeller
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 EP0223015A2 publication Critical patent/EP0223015A2/en
Publication of EP0223015A3 publication Critical patent/EP0223015A3/en
Application granted granted Critical
Publication of EP0223015B1 publication Critical patent/EP0223015B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/12Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293Devices for filling up the cylinder gap; Devices for removing the filler

Definitions

  • the radial length or height of the filler (13) is dimensioned such that the jacket contour (16) of the filler (13) comes to lie in the range ⁇ 0.05 mm above or below the bearer ring. If the invention is used in a bearerless printing machine, the height of the filler (3) must be such that the outer contour of the filler (16) is ⁇ 0.05 mm above or below the theoretical pitch circle of the drive gears.
  • the surface of the filler (13), i.e. its curved contour (16) may therefore lie at most 0.05 mm below the associated bearer ring or the associated theoretical pitch circle or at most 0.05 mm above the bearer ring or the theoretical pitch circle.
  • the rubber blanket (3 or 21) used is adjusted using bearer rings, including the underlays 0.04 to 0.1 mm, which means that at least in the parked state the respective cover layer (5 or 22) is slightly higher than the contour (16 or 32) of the filling pieces (13 or 31) shown. The same also applies to the filler pieces (13 'or 31') in the pits of the adjacent cylinders (1 'or 19').

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  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)

Description

Die Erfindung betrifft einen Druckwerkzylinder mit einem in dessen Zylindergrube angeordneten Füllstück.The invention relates to a printing unit cylinder with a filler arranged in its cylinder pit.

Insbesondere bei modernen, schnellaufenden Rotationsdruckmaschinen entsteht beim Überrollen der Zylindergruben zweier Druckwerkzylinder, beispielsweise zweier Gummituchzylinder, ein sogenannter Kanalstoß, der sich durch Druckstreifen, also Streifen unterschiedlicher Farbintensität auf dem Druckexemplar bemerkbar machen kann. Durch Abdecken der Zylindergrube, beispielsweise nach der DE-A 31 10 982 oder durch die Grube überdeckende Stege, z.B. gemäß der DE-C 34 34 642 (nach dem Prioritätsdatum dieser Anmeldung veröffentlicht) wurde bereits versucht, derartige druckqualitätsmindernde Stöße zu dämpfen. Abgesehen davon, daß sich die bisher bekannten Füllstücke über die gesamte Länge der Zylindergruben erstreckten, was offensichtlich bei der Handhabung in der Maschine und bei der Herstellung gewisse Schwierigkeiten bzw. einen gewissen Aufwand mit sich brachte, konnte die schädliche Auswirkung der Zylinderschwingungen, besonders infolge des Auftreffens der Zylinder nach dem Durchlaufen der Grube, in ihrer Auswirkung nicht ausreichend eliminiert werden.Particularly in modern, high-speed rotary printing presses, rolling over the cylinder pits of two printing unit cylinders, for example two blanket cylinders, creates a so-called channel joint, which can be noticed on the printed copy by printing strips, that is to say strips of different color intensity. By covering the cylinder pit, for example according to DE-A 31 10 982 or by webs covering the pit, e.g. According to DE-C 34 34 642 (published after the priority date of this application) attempts have already been made to dampen such printing quality-reducing impacts. In addition to the fact that the previously known filler pieces extended over the entire length of the cylinder pits, which obviously involved certain difficulties or a certain amount of effort during handling in the machine and during manufacture, the damaging effect of the cylinder vibrations, especially as a result of the Impact of the cylinders after passing through the pit, their impact cannot be sufficiently eliminated.

Aufgabe der Erfindung ist es deshalb, ein Füllstück für eine Zylindergrube zu schaffen, das sowohl im sogenannten Schmitzringläufer als auch in Druckmaschinen ohne Schmitzringe einsetzbar ist und mit dem Zylinderschwingungen nach dem Durchlaufen der Zylindergruben so weit gedämpft bzw. am Entstehen gehindert werden können, daß sich keine nennenswerte Auswirkung auf dem Druckexemplar zeigt. Diese Aufgabe wird durch die Anwendung der Merkmale des kennzeichnenden Teils gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen und aus der Beschreibung in Verbindung mit den Zeichnungen. In diesen zeigen jeweils schematisch:

Fig.1
einen Schnitt durch eine Zylindergrube mit dem erfindungsgemäßen Füllstück,
Fig.2
eine Draufsicht auf die Grube gemäß Fig.1,
Fig.3
einen Schnitt durch eine Zylindergrube mit seitlichen Abflachungen und
Fig.4
eine Befestigungsvorrichtung für ein Füllstück in einer Zylindergrube.
The object of the invention is therefore to provide a filler for a cylinder pit, which can be used both in the so-called bearer ring rotor and in printing presses without bearer rings and can be damped or prevented from arising with the cylinder vibrations after passing through the cylinder pits shows no significant impact on the printed copy. This object is achieved by applying the features of the characterizing part. Advantageous further developments result from the subclaims and from the description in conjunction with the drawings. Each of these shows schematically:
Fig. 1
3 shows a section through a cylinder pit with the filler piece according to the invention,
Fig. 2
2 shows a plan view of the pit according to FIG. 1,
Fig. 3
a section through a cylinder pit with side flats and
Fig. 4
a fastening device for a filler in a cylinder pit.

Fig.1 zeigt einen Gummituchzylinder (1), auf dessen Zylindermantel (2) in allgemein bekannter Weise ein Gummituch (3) aufgespannt wird. Das Gummituch (3) besteht aus einer unteren Trägerschicht (4),beispielsweise aus Gewebe, und einer darüberliegenden Deckschicht (5), beispielsweise aus Gummi. Die (6, 7) des Gummituches (3) werden mit nicht dargestellten, allgemein bekannten Mitteln, beispielsweise Spannspindeln in der sich in Achsrichtung erstrecktenden Zylindergrube (8) befestigt und an das Gummituch (3) gespannt. Dabei wird das Gummituch (3) über die Grubenkanten (9, 10) gezogen.Fig.1 shows a blanket cylinder (1), on the cylinder jacket (2) in a generally known manner, a blanket (3) is stretched. The rubber blanket (3) consists of a lower carrier layer (4), for example made of fabric, and an overlying cover layer (5), for example made of rubber. The (6, 7) of the rubber blanket (3) are fastened with not shown, generally known means, for example tensioning spindles in the cylinder pit (8) extending in the axial direction and tensioned on the rubber blanket (3). The rubber blanket (3) is pulled over the pit edges (9, 10).

In erfindungsgemäßer Weise wird im mittleren Drittel des Gummizylinders (1) ein vorzugsweise metallisches Füllstück (13) in die Zylindergrube (8) eingesetzt, d.h. durch die Grubenöffnung (12) eingeschoben und mittels nicht näher dargestellter Schrauben, die durch eine Bohrung (14) im Füllstück (13) geführt werden, am Gewindeloch (15) des Grubenbodens (11) festgeschraubt. Vorzugsweise soll das Füllstück (3) so dimensioniert sein, daß es sich zumindest im Bereich der Grubenöffnung (12) an einer Grubenkante (10) abstützt, um etwa in Umfangsrichtung wirkende Kräfte aufnehmen zu können, die bei ungünstigen Bedingungen ein Kippen des Füllstückes (13) in der Zylindergrube (8) bzw. in der Grubenöffnung (12) bewirken könnten. Der Gummizylinder (1) dreht sich in Pfeilrichtung und kann an einen anderen Gummituchzylinder angestellt sein, der bei 1' angedeutet ist, so daß ein Schöndruck und ein Widerdruck auf einen zwischen den beiden Zylindern 1, 1' hindurchgeführten Druckträger aufgebracht werden kann.In the manner according to the invention, a preferably metallic filler (13) is inserted into the cylinder pit (8) in the middle third of the rubber cylinder (1), ie inserted through the pit opening (12) and by means of screws (not shown) which pass through a bore (14) in the Filler (13) are guided, screwed to the threaded hole (15) of the pit floor (11). The filler (3) should preferably be dimensioned such that it is supported at least in the area of the pit opening (12) on a pit edge (10) in order to be able to absorb forces acting in the circumferential direction, which, under unfavorable conditions, cause the filler (13 ) in the cylinder pit (8) or in the pit opening (12). The rubber cylinder (1) rotates in the direction of the arrow and can be attached to another rubber blanket cylinder, which is indicated at 1 ', so that a front and back pressure on one between the can be applied to both cylinders 1, 1 'passed printing medium.

Fig.2 zeigt in Draufsicht das Füllstück (13), das über die Grubenöffnung (12) in die Zylindergrube (8) eingesetzt ist. Erfindungsgemäß wird über die Länge des Füllstückes (13) in Grubenlängsrichtung bzw. in Achsrichtung des Druckwerkzylinders (1) die Deckschicht oder das gesamte Gummituch (5) beiderseits der Grubenöffnung (12) entfernt, so daß lediglich über diesen Bereich die Trägerschicht (4), d.h. das Gewebe des Gummituches (3), in die Zylindergrube (8) eingeführt wird, wie bei (17) und (18) angedeutet ist. Vorzugsweise besteht das Füllstück (13) aus Metall und weist in Umfangsrichtung gesehen eine Breite auf, die geringfügig größer ist als die Breite der Grubenöffnung (12). Erfindungswesentlich ist es, daß die radiale Länge bzw. Höhe des Füllstückes (13) so bemesen ist, daß die Mantelkontur (16) des Füllstückes (13) im Bereich ± 0,05 mm über oder unter dem Schmitzring zu liegen kommt. Wird die Erfindung bei einer schmitzringlosen Druckmaschine verwendet, so muß die Höhe des Füllstückes (3) so bemessen werden, daß die äußere Kontur des Füllstückes (16) ± 0,05 mm über oder unter dem theoretischen Teilkreis der Antriebszahnräder liegt. Die Oberfläche des Füllstückes (13), d.h. seine gekrümmte Kontur (16), darf also höchstens 0,05 mm unterhalb des zugehörigen Schmitzringes bzw. des zugehörigen theoretischen Teilkreises oder maximal 0,05 mm über dem Schmitzring bzw. dem theoretischen Teilkreis liegen. Die Krümmung der Kontur (16) sollte vorzugsweise der Krümmung des Schmitzringes bzw. der Krümmung des theoretischen Teilkreises entsprechen. Dies bedeutet, daß die Oberfläche bzw. Kontur (16) des Füllstücks nicht so stark gekrümmt ist, wie der im Durchmesser kleinere Gummituchzylinder 1.2 shows a top view of the filler (13) which is inserted into the cylinder pit (8) via the pit opening (12). According to the invention, the cover layer or the entire rubber blanket (5) on both sides of the pit opening (12) is removed over the length of the filler piece (13) in the longitudinal direction of the pit or in the axial direction of the printing unit cylinder (1), so that the carrier layer (4) only extends over this area. ie the fabric of the rubber blanket (3) is inserted into the cylinder pit (8), as indicated at (17) and (18). The filler (13) is preferably made of metal and, viewed in the circumferential direction, has a width which is slightly larger than the width of the pit opening (12). It is essential to the invention that the radial length or height of the filler (13) is dimensioned such that the jacket contour (16) of the filler (13) comes to lie in the range ± 0.05 mm above or below the bearer ring. If the invention is used in a bearerless printing machine, the height of the filler (3) must be such that the outer contour of the filler (16) is ± 0.05 mm above or below the theoretical pitch circle of the drive gears. The surface of the filler (13), i.e. its curved contour (16) may therefore lie at most 0.05 mm below the associated bearer ring or the associated theoretical pitch circle or at most 0.05 mm above the bearer ring or the theoretical pitch circle. The curvature of the contour (16) should preferably correspond to the curvature of the bearer ring or the curvature of the theoretical pitch circle. This means that the surface or contour (16) of the filling piece is not curved as much as the blanket cylinder 1, which is smaller in diameter.

Durch die in den Figuren 1 und 2 dargestellte und beschriebene Verwendung des Füllstückes (13) in der Grube (8) des Gummituchzylinders (1) und des Füllstückes (13') in der Grube des an diesen angestellten weiteren Gummituchzylinders (1') können die beim Überrollen der Zylindergruben auftretenden Stöße wirkungsvoll gedämpft werden bzw. nicht in der bei bekannten Grubenabdeckungen zu beobachtenden Intensität auftreten. Dadurch wird die Qualität des Druckes erheblich verbessert.Through the use of the filler (13) in the pit (8) of the rubber blanket cylinder (1) and the filler (13 ') in the pit of the further blanket cylinder (1') employed and shown in FIGS Shocks occurring when rolling over the cylinder pits are effectively damped or not in the case of known ones Pit covers of observable intensity occur. This significantly improves the quality of the print.

Fig.3 zeigt eine weitere Ausführungsform der Erfindung an einem Gummituchzylinder (19), auf dessen Mantel (20) in der bereits beschriebenen Weise ebenfalls ein Gummituch (21) mit einer Deckschicht (22) und einer Trägerschicht (23) aufgespannt wird. Dabei werden die Enden (27, 28) des Gummituches (1) in der Zylindergrube (24) beispielsweise mit Hilfe von nicht dargestellten Spannspindeln fixiert und das Gummituch (21) dabei über Grubenkanten (25, 26) gezogen. Im Gegensatz zu der Ausführungsform gemäß Fig.1 weist der Gummituchzylinder (19) gemäß Fig.3 beiderseits der Grubenöffnung (29) Abflachungen (33, 34) auf. Auch bei einem derartigen Zylinder ist es vorteilhaft, ein Füllstück (31) zu verwenden, das sich ebenfalls am Grubenboden (30) in der bereits beschriebenen Weise abstützen kann und in der Grube entsprechend zu befestigen ist. Auch hier soll die kreiszylinderförmige Kontur (32) des Füllstückes (31) zwischen ± 0,05 mm über bzw. unter den verwendeten Schmitzringen, die bei Teil (44) angedeutet sind oder bei schmitzringlosen Läufern über und unter dem theoretischen Teilkreis, der ebenfalls bei (45) angedeutet ist, liegen.3 shows a further embodiment of the invention on a blanket cylinder (19), on the jacket (20) of which a blanket (21) with a cover layer (22) and a carrier layer (23) is also stretched in the manner already described. The ends (27, 28) of the rubber blanket (1) are fixed in the cylinder pit (24), for example with the aid of tensioning spindles, not shown, and the rubber blanket (21) is pulled over pit edges (25, 26). In contrast to the embodiment according to FIG. 1, the blanket cylinder (19) according to FIG. 3 has flats (33, 34) on both sides of the pit opening (29). In the case of such a cylinder, too, it is advantageous to use a filler piece (31) which can also be supported on the pit floor (30) in the manner already described and is to be fastened accordingly in the pit. Here too, the circular-cylindrical contour (32) of the filler (31) should be between ± 0.05 mm above or below the bearer rings used, which are indicated in part (44) or, in the case of bearerless rings, above and below the theoretical pitch circle, which is also at (45) is indicated.

Es kann bei manchen Ausführungsfällen auch günstig sein, das vorzugsweise metallische Füllstück (31), wie bei (47) angedeutet, über eine Dämpfungsschicht im Zylinder, hier am Grubenboden (30), abzustützen.In some embodiments it can also be favorable to support the preferably metallic filler (31), as indicated at (47), via a damping layer in the cylinder, here on the pit floor (30).

Um ein "Ineinanderfallen" zweier benachbarter Zylinder vor bzw. hinter den Füllstücken (31, 31') zu vermeiden, ist gemäß der Ausführungsform von Fig.3 das Füllstück (31) im Querschnitt etwa pilzförmig ausgebildet, so daß sich die seitlichen Bereiche bzw. Seitenteile über die Abflachung (33 und 34) der Zylinder (13, 19') erstrecken. Besonders bei niedrigeren Betriebsgeschwindigkeiten einer Druckmaschine wird dadurch das Aufeinanderzubewegen benachbarter Druckwerkzylinder (19, 19') beim Erreichen der Abflachungen (33 bzw. 34) in vorteilhafter Weise vermieden.In order to avoid "falling into each other" of two adjacent cylinders in front of or behind the filler pieces (31, 31 '), the filler piece (31) is approximately mushroom-shaped in cross section according to the embodiment of FIG. 3, so that the lateral areas or Extend the side parts over the flat (33 and 34) of the cylinders (13, 19 '). Particularly at lower operating speeds of a printing press, this advantageously prevents adjacent printing unit cylinders (19, 19 ') from moving towards one another when the flats (33 or 34) are reached.

Da üblicherweise der Zylinderaufzug, d.h. das jeweils verwendete Gummituch (3 bzw.21) unter Einbeziehung der Unterlagen 0,04 bis 0,1 mm über Schmitzringe justiert wird, ergibt sich, daß zumindest im abgestellten Zustand die jeweilige Deckschicht (5 bzw. 22) etwas höher liegt als die Kontur (16 bzw. 32) der dargestellten Füllstücke (13 bzw.31). Das gleiche gilt auch für die Füllstücke (13' bzw. 31') in den Gruben der benachbarten Zylinder (1' bzw. 19').As the cylinder lift, i.e. The rubber blanket (3 or 21) used is adjusted using bearer rings, including the underlays 0.04 to 0.1 mm, which means that at least in the parked state the respective cover layer (5 or 22) is slightly higher than the contour (16 or 32) of the filling pieces (13 or 31) shown. The same also applies to the filler pieces (13 'or 31') in the pits of the adjacent cylinders (1 'or 19').

Fig.4 zeigt eine Möglichkeit, ein Füllstück, hier mit (35) bezeichnet, mit seinem Schaft (36) mit Hilfe von zwei Halteschienen (37 und 38) am Grubenboden (39) zu befestigen. Dabei kann eine Halterung, z.B. (37) am Grubenboden (39) fixiert und die andere Halterung, hier (38) beweglich sein, wobei eine Druckfeder (40), die sich an der Seitenwand (41) der Zylindergrube (39) abstützt, die Halterung (38) vorspannt. Damit kann in einfacher Weise das Füllstück (35) in die Grube eingesetzt und dann durch eine entsprechende axiale Verschiebung zwischen die Halterungen (37, 38) geschoben werden. Dies stellt eine alternative Befestigungsmöglichkeit dar zu der in Fig.1 gezeigten Befestigung durch eine Schraubverbindung. Bei der in Anlehnung an das Füllstück (31) gemäß Fig.3 ebenfalls pilzförmigen Ausbildung des Füllstückes (35) sind die beiden Seitenbereiche bzw.-teile bei (42, 43) angedeutet, die beim Einsatz in eine Zylindergrube Abflachungen überdecken.Fig. 4 shows a possibility of attaching a filler, here designated (35), with its shaft (36) to the pit floor (39) with the aid of two holding rails (37 and 38). A bracket, e.g. (37) fixed to the pit floor (39) and the other holder, here (38), can be movable, a compression spring (40), which is supported on the side wall (41) of the cylinder pit (39), prestressing the holder (38). The filler (35) can thus be inserted into the pit in a simple manner and then pushed between the brackets (37, 38) by a corresponding axial displacement. This represents an alternative fastening option to the fastening shown in FIG. 1 by a screw connection. In the likewise mushroom-shaped design of the filler (35) based on the filler (31) according to FIG. 3, the two side regions or parts are indicated at (42, 43), which cover flats when used in a cylinder pit.

Claims (8)

  1. Printing unit cylinder having a filling piece arranged in its cylinder groove, characterised in that the filling piece (13, 13', 31, 31') arranged in the middle third in the longitudinal direction of the groove is supported on the bottom (11, 30) of the groove and in the region of the groove opening (12, 29) directly or indirectly abuts a groove edge (10, 26) and in that the outer contour (16, 32) of the filling piece (13, 13', 31, 31'), adapted as regards its curve to the contour of the Schmitz rings (44) or the theoretical arc of the circle (45) of the cylinder drive gear wheel, is determined as regards its height at + 0.05 mm with respect to the Schmitz ring (44) or the theoretical arc of a circle (45).
  2. Printing unit cylinder according to claim 1, characterised in that the printing unit cylinder (19), laterally of the groove opening (29), is provided with shallow portions (33, 34) on which the filling piece (31) rests.
  3. Printing unit cylinder according to claim 1 or 2, characterised in that the printing unit cylinder (1, 1', 19, 19') is coated with a rubber blanket (3, 21) whose ends (6, 7; 27, 28) are secured in the cylinder groove (8, 24) and in that the cover layer (5, 22) of the rubber blanket (3, 21) or the cover layer (3, 21) (sic) and the fabric (4, 23) is removed over the axial length of the filling piece (13, 31) so that it borders the filling piece (13, 31).
  4. Printing unit cylinder according to claim 1, characterised in that the filling piece (13, 13') is slightly wider than the groove opening (12) and is supported laterally on both sides of the groove edges (9, 10).
  5. Printing unit cylinder according to one of the preceding claims, characterised in that the filling piece (13) is screwed to the bottom (11) of the groove.
  6. Printing unit cylinder according to one of claims 1 to 4, characterised in that the filling piece (35) is secured on the bottom (39) of the groove by a holding device (37, 38) incorporating a spring-loaded element (38).
  7. Printing unit cylinder according to one of the preceding claims, characterised in that the filling piece (13, 13', 31, 31') is made of metal.
  8. Printing unit cylinder according to one of the preceding claims, characterised in that the filling piece (31, 31') is supported on the cylinder (19) by means of a resilient layer (47).
EP86113159A 1985-11-15 1986-09-24 Printing cylinder with a filling piece in its groove Expired - Lifetime EP0223015B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540581 DE3540581A1 (en) 1985-11-15 1985-11-15 PRINTING CYLINDER WITH A FILLING PIECE IN ITS CYLINDER PIT
DE3540581 1985-11-15

Publications (3)

Publication Number Publication Date
EP0223015A2 EP0223015A2 (en) 1987-05-27
EP0223015A3 EP0223015A3 (en) 1988-11-02
EP0223015B1 true EP0223015B1 (en) 1991-04-03

Family

ID=6286094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113159A Expired - Lifetime EP0223015B1 (en) 1985-11-15 1986-09-24 Printing cylinder with a filling piece in its groove

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Country Link
US (1) US4742769A (en)
EP (1) EP0223015B1 (en)
JP (1) JPH0777796B2 (en)
DE (2) DE3540581A1 (en)

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Also Published As

Publication number Publication date
JPS62119039A (en) 1987-05-30
JPH0777796B2 (en) 1995-08-23
US4742769A (en) 1988-05-10
EP0223015A2 (en) 1987-05-27
DE3678532D1 (en) 1991-05-08
DE3540581A1 (en) 1987-05-21
DE3540581C2 (en) 1989-01-19
EP0223015A3 (en) 1988-11-02

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