EP0796734A1 - Sheet transfer cylinder for a printing machine - Google Patents

Sheet transfer cylinder for a printing machine Download PDF

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Publication number
EP0796734A1
EP0796734A1 EP96118805A EP96118805A EP0796734A1 EP 0796734 A1 EP0796734 A1 EP 0796734A1 EP 96118805 A EP96118805 A EP 96118805A EP 96118805 A EP96118805 A EP 96118805A EP 0796734 A1 EP0796734 A1 EP 0796734A1
Authority
EP
European Patent Office
Prior art keywords
drum
sheet
jacket
guiding
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96118805A
Other languages
German (de)
French (fr)
Other versions
EP0796734B1 (en
Inventor
Hanns-Otto Haas
Norbert Kreuzer
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
Priority claimed from DE19611590A external-priority patent/DE19611590C1/en
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0796734A1 publication Critical patent/EP0796734A1/en
Application granted granted Critical
Publication of EP0796734B1 publication Critical patent/EP0796734B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F22/00—Means preventing smudging of machine parts or printed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/25—Damages to handled material
    • B65H2601/251—Smearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a sheet-guiding drum for a printing machine for smear-free sheet transport according to the preamble of claim 1.
  • a sheet-guiding drum of this type is known from DE 3 347 886 C2.
  • the drum body has an outer surface made of a porous, air-permeable material.
  • An air cushion generated on the outer surface prevents the printed sheets transported in the direction of sheet travel from being smeared, the air being conducted from the inside of the drum to the surface thereof.
  • DE 4 223 839 C1 discloses a sheet-guiding drum which also has through openings in its outer surface. Blown air is generated inside the drum by means of a radial fan which is rotatably mounted coaxially to the cylinder axis and which is connected to the ambient air at the end face via openings arranged in the side walls of the drum.
  • the radial fan has a drive which is adjustable in speed independently of the sheet-guiding drum.
  • the object of the invention is to develop a sheet-guiding drum which ensures a smear-free sheet guidance of printed sheets with little construction effort. This is solved by the training features of the main claim. Further training results from the subclaims.
  • the sheet-guiding drum ensures smear-free transport of printed and / or painted sheets.
  • the sheet coming from an upstream printing press cylinder is kept with the printed side away from the lateral surface of the sheet-guiding drum by an air cushion.
  • the drum is suitable for a take-up drum arranged in the boom, as well as Transfer drum between printing units, coating units or further processing stations or in their combination.
  • a sheet-guiding drum 1 is arranged as a take-up drum in the delivery of a sheet-processing printing machine.
  • the boom is formed in a manner known per se by a chain conveyor system 4 rotating in the sheet running direction 9, on which gripper systems 3 for sheets 2 to be laid out for transport are arranged.
  • the drum 1 is preceded by a printing press cylinder 10 belonging to a coating unit.
  • a sheet guide device 8 is arranged, which can be acted upon either with blowing or suction air.
  • a sheet brake unit 7 is arranged, which serves to decelerate the speed of the sheets 2 to be deposited on the delivery stack 5.
  • the sheet-guiding drum 1 is arranged as a transfer drum between two printing units, a printing unit being formed by a plate cylinder 12, a blanket cylinder 11 and a printing press cylinder 10.
  • a printing unit being formed by a plate cylinder 12, a blanket cylinder 11 and a printing press cylinder 10.
  • Other well-known assemblies such as inking and dampening units will not be discussed further here.
  • FIG. 3 shows the sheet-guiding drum 1 as a removal drum with a shaft 14 mounted on the frame.
  • the fans 15 are coupled in terms of circuitry to an electrical voltage supply.
  • the rotatably mounted drum jacket 13 is provided with openings 23 for the escape of air.
  • a closed guide plate 22 is fixed to the frame in the non-leading area of the drum 1 within the drum shell 13 to improve the efficiency.
  • the drum jacket 13 has a plurality of openings 23.
  • the drum jacket 13 can likewise be formed by porous material or in combination with openings and porous material.
  • the drum 1 is designed as a removal drum.
  • the shaft 14 is mounted in a frame 6 arranged on both sides.
  • a connector 16 is attached to the frame 6 and carries a partition plate 17.
  • the partition plate 17 extends essentially over the side surfaces of the drum 1. Facing the frame 6, the fans 15 on the partition plate 17 are fixed to the frame arranged.
  • a sprocket 19 is fixed on the rotatable shaft 14 with a flange 21 adjacent to the partition plate 17.
  • a chain 18 of the chain conveyor system 4 is guided over the chain wheel 19, to which the gripper systems 3 are fastened in a known manner.
  • the drum jacket 13 is attached to the sprocket 19 on each side of the frame. Partition plate 17 and sprocket 19 have openings 20 so that the air generated by fans 15 is connected to the hollow interior of the drum 1.
  • the design is not limited to the take-up drum which interacts with rotating gripper systems 3. Rather, the drum 1 can also be designed as a transfer drum with gripper bridges fixedly arranged on the circumference.
  • the structure is equivalent to the take-up drum according to FIG. 4.
  • the drum jacket 13 is supported on the shaft 14 when it is designed as a transfer drum.
  • the partition plate 17 with fans 15 is arranged fixed to the frame, analogous to the design as a removal drum.
  • a baffle 22 is arranged in the area of the transfer drum that does not lead to the bend in the upper circular sector (FIG. 2).
  • a drying function for the sheet can be achieved by means of the drum 1.
  • the heating element 24 is fixedly arranged on the partition plate 17 in front of the sprocket 19.
  • the heating element 24 is designed, for example, as a heating wire element, which is connected to the machine control in terms of circuitry and can be switched on if required.
  • a sheet 2 is transferred from a printing press cylinder 10 to the drum 1.
  • the fans 15 built up a rotating air cushion on the drum casing 13 so that the sheet is guided on the drum casing 13 without contact.
  • the sheet guide devices 8 assigned to the drum 1 are supplied with blown air (with perfect and reverse printing) or with suction air (with straight printing).
  • the sheet 2 is deflected by the drum 1 and, if it is designed as a take-up drum, is guided from the gripper system 3 to the delivery stack 5.
  • the sheet 2 guided in the gripper closure is transferred to a printing press cylinder 10 arranged downstream in the sheet travel direction 9.
  • the drum jacket 13 rotates while the partition plates 17 are fixed with fans 15. There is a small gap between the drum jacket 13 and the bulkhead 17.
  • the drum casing 13 is designed as a take-up drum, it is driven by the rotating sprocket 19.
  • it is designed as a transfer drum, it is driven by the machine drive and the shaft 14.
  • the drying time can be shortened by switching on the heating elements 24.
  • the air supplied to the drum 1 is heated and emerges from the openings 23 of the drum shell 13.
  • the fans 15 are switched to blown air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

The drum has bulkhead plates (17) with blowers (15) secured to the end sides of the rotating drum cover (13). The plates have through holes (20) for the entry of the blown air produced by the blowers into the interior of the drum cover. The drum is mounted on a shaft (14) with a chain wheel (19). A heater (24) is provided on the chain wheel in the region of each blower.

Description

Die Erfindung betrifft eine bogenführende Trommel für eine Druckmaschine zum abschmierfreien Bogentransport gemäß dem Oberbegriff des Anspruches 1.The invention relates to a sheet-guiding drum for a printing machine for smear-free sheet transport according to the preamble of claim 1.

Eine bogenführende Trommel dieser Art ist aus DE 3 347 886 C2 bekannt. Der Trommelkörper weist eine Mantelfläche aus einem porösen, luftdurchlässigen Material auf Ein auf der Mantelfläche erzeugtes Luftpolster verhindert das Abschmieren der in Bogenlaufrichtung transportierten, bedruckten Bogen, wobei die Luft vom Inneren der Trommel an deren Oberfläche geführt wird.A sheet-guiding drum of this type is known from DE 3 347 886 C2. The drum body has an outer surface made of a porous, air-permeable material. An air cushion generated on the outer surface prevents the printed sheets transported in the direction of sheet travel from being smeared, the air being conducted from the inside of the drum to the surface thereof.

Weiterhin ist aus der DE 4 223 839 C1 eine bogenführende Trommel bekannt, die ebenfalls in ihrer Mantelfläche Durchgangsöffnungen aufweist. Die Erzeugung von Blasluft erfolgt im Trommelinneren durch einen koaxial zur Zylinderachse drehbar gelagerten Radialventilator, der stirnseitig über in den Seitenwänden der Trommel angeordnete Öffnungen mit der Umgebungsluft in Verbindung steht. Der Radialventilator besitzt einen von der bogenführenden Trommel unabhängigen in seiner Geschwindigkeit regelbaren Antrieb.Furthermore, DE 4 223 839 C1 discloses a sheet-guiding drum which also has through openings in its outer surface. Blown air is generated inside the drum by means of a radial fan which is rotatably mounted coaxially to the cylinder axis and which is connected to the ambient air at the end face via openings arranged in the side walls of the drum. The radial fan has a drive which is adjustable in speed independently of the sheet-guiding drum.

Nachteilig bei diesen Ausbildungen ist es, daß der bauliche Aufwand relativ hoch ist.A disadvantage of these designs is that the construction effort is relatively high.

Aufgabe der Erfindung ist es eine bogenführende Trommel zu entwickeln, die mit geringem baulichen Aufwand eine abschmierfreie Bogenführung von bedruckten Bogen gewährleistet. Gelöst wird dies durch die Ausbildungsmerkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.The object of the invention is to develop a sheet-guiding drum which ensures a smear-free sheet guidance of printed sheets with little construction effort. This is solved by the training features of the main claim. Further training results from the subclaims.

Die bogenführende Trommel gewährleistet einen abschmierfreien Transport von bedruckten und/oder lackierten Bogen. Der dabei von einem vorgeordneten Druckmaschinenzylinder kommende Bogen wird mit der bedruckten Seite von der Mantelfläche der bogenführenden Trommel durch ein Luftpolster ferngehalten. Die Trommel eignet sich für eine im Ausleger angeordnete Abnahmetrommel, ebenso als Transfertrommel zwischen Druckeinheiten, Lackiereinheiten oder Weiterverarbeitungsstationen oder in deren Kombination.The sheet-guiding drum ensures smear-free transport of printed and / or painted sheets. The sheet coming from an upstream printing press cylinder is kept with the printed side away from the lateral surface of the sheet-guiding drum by an air cushion. The drum is suitable for a take-up drum arranged in the boom, as well as Transfer drum between printing units, coating units or further processing stations or in their combination.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail using an exemplary embodiment.

Dabei zeigen:

Fig. 1
eine Abnahmetrommel im Ausleger,
Fig. 2
eine Transfertrommel zwischen Druckeinheiten,
Fig. 3
eine Abnahmetrommel in Seitenansicht,
Fig. 4
eine Abnahmetrommel in Vorderansicht (Schnitt) entgegen der Bogenlaufrichtung.
Fig.5
einen Aussschnitt der Trommel gem. Fig. 4.
Show:
Fig. 1
a take-off drum in the boom,
Fig. 2
a transfer drum between printing units,
Fig. 3
a removal drum in side view,
Fig. 4
a take-up drum in front view (section) against the sheet running direction.
Fig. 5
a section of the drum acc. Fig. 4.

Gemäß Fig. 1 ist eine bogenführende Trommel 1 als Abnahmetrommel im Ausleger einer bogenverarbeitenden Druckmaschine angeordnet. Der Ausleger ist in an sich bekannter Weise durch ein in Bogenlaufrichtung 9 umlaufendes Kettenfördersystem 4 gebildet, an dem Greifersysteme 3 für den Transport auszulegender Bogen 2 angeordnet sind. Der Trommel 1 ist in Bogenlaufrichtung 9 ein zu einer Lackiereinheit gehörender Druckmaschinenzylinder 10 vorgeordnet. Unterhalb der Trommel 1 ist eine Bogenleiteinrichtung 8 angeordnet, welche wahlweise mit Blas- oder Saugluft beaufschlagbar ist. Vor einem Auslegerstapel 5 ist eine Bogenbremseinheit 7 angeordnet, welche der Geschwindigkeitsverzögerung der abzulegenden Bogen 2 auf dem Auslegerstapel 5 dient.1, a sheet-guiding drum 1 is arranged as a take-up drum in the delivery of a sheet-processing printing machine. The boom is formed in a manner known per se by a chain conveyor system 4 rotating in the sheet running direction 9, on which gripper systems 3 for sheets 2 to be laid out for transport are arranged. In the sheet running direction 9, the drum 1 is preceded by a printing press cylinder 10 belonging to a coating unit. Below the drum 1, a sheet guide device 8 is arranged, which can be acted upon either with blowing or suction air. In front of a delivery stack 5, a sheet brake unit 7 is arranged, which serves to decelerate the speed of the sheets 2 to be deposited on the delivery stack 5.

Nach Fig. 2 ist die bogenführende Trommel 1 als Transfertrommel zwischen zwei Druckeinheiten angeordnet, wobei ein Druckwerk durch einen Plattenzylinder 12, einen Gummituchzylinder 11 und einen Druckmaschinenzylinder 10 gebildet ist. Auf weitere bekannte Baugruppen wie Farb- und Feuchtwerke soll hier nicht weiter eingegangen werden.2, the sheet-guiding drum 1 is arranged as a transfer drum between two printing units, a printing unit being formed by a plate cylinder 12, a blanket cylinder 11 and a printing press cylinder 10. Other well-known assemblies such as inking and dampening units will not be discussed further here.

Fig. 3 zeigt die bogenführende Trommel 1 als Abnahmetrommel mit einer gestellfest gelagerten Welle 14. Stirnseitig sind der Trommel 1 mehrere gestellfeste Ventilatoren 15 zugeordnet, die symmetrisch verteilt angeordnet sind. Die Ventilatoren 15 sind mit einer elektrischen Spannungsversorgung schaltungstechnisch gekoppelt. Der rotierbar gelagerte Trommelmantel 13 ist zum Austritt von Luft mit Öffnungen 23 versehen. In Richtung des Auslegeraufganges ist im nichtführenden Bereich der Trommel 1 innerhalb des Trommelmantels 13 zur Verbesserung des Wirkungsgrades ein geschlossenes Leitblech 22 gestellfest angeordnet. Der Trommelmantel 13 weist dabei eine Vielzahl Öffnungen 23 auf. Ebenso kann der Trommelmantel 13 durch poröses Material oder in Kombination mit Öffnungen und porösem Material gebildet sein.FIG. 3 shows the sheet-guiding drum 1 as a removal drum with a shaft 14 mounted on the frame. At the end of the drum 1 there are several fans 15 fixed to the frame assigned, which are arranged symmetrically distributed. The fans 15 are coupled in terms of circuitry to an electrical voltage supply. The rotatably mounted drum jacket 13 is provided with openings 23 for the escape of air. In the direction of the boom riser, a closed guide plate 22 is fixed to the frame in the non-leading area of the drum 1 within the drum shell 13 to improve the efficiency. The drum jacket 13 has a plurality of openings 23. The drum jacket 13 can likewise be formed by porous material or in combination with openings and porous material.

In Fig. 4 ist die Trommel 1 als Abnahmetrommel ausgebildet. In einem beidseitig angeordneten Gestell 6 ist die Welle 14 gelagert. Am Gestell 6 ist ein Verbindungsstück 16 befestigt, welches ein Abschottblech 17 trägt. Das Abschottblech 17 erstreckt sich im wesentlichen über die Seitenflächen der Trommel 1. Dem Gestell 6 zugewandt sind die Ventilatoren 15 am Abschottblech 17 gestellfest
angeordnet. Dem Abschottblech 17 benachbart ist ein Kettenrad 19 auf der drehbaren Welle 14 mit einem Flansch 21 fixiert. Über das Kettenrad 19 wird eine Kette 18 des Kettenfördersystems 4 geführt, an der in bekannter Weise die Greifersysteme 3 befestigt sind. Auf jeder Gestellseite ist am Kettenrad 19 der Trommelmantel 13 befestigt. Abschottblech 17 und Kettenrad 19 weisen Durchbrüche 20 auf so daß die von Ventilatoren 15 erzeugte Luft mit dem hohlen Innenraum der Trommel 1 in Verbindung steht.4, the drum 1 is designed as a removal drum. The shaft 14 is mounted in a frame 6 arranged on both sides. A connector 16 is attached to the frame 6 and carries a partition plate 17. The partition plate 17 extends essentially over the side surfaces of the drum 1. Facing the frame 6, the fans 15 on the partition plate 17 are fixed to the frame
arranged. A sprocket 19 is fixed on the rotatable shaft 14 with a flange 21 adjacent to the partition plate 17. A chain 18 of the chain conveyor system 4 is guided over the chain wheel 19, to which the gripper systems 3 are fastened in a known manner. The drum jacket 13 is attached to the sprocket 19 on each side of the frame. Partition plate 17 and sprocket 19 have openings 20 so that the air generated by fans 15 is connected to the hollow interior of the drum 1.

Die Ausbildung ist wie oben angeführt nicht auf die mit umlaufenden Greifersystemen 3 zusammenwirkende Abnahmetrommel beschränkt. Vielmehr kann die Trommel 1 auch als Transfertrommel mit am Umfang fest angeordneten Greiferbrücken ausgebildet sein. Der Aufbau ist äquivalent zur Abnahmetrommel gemäß Fig. 4. Der Trommelmantel 13 stützt sich bei der Ausbildung als Transfertrommel auf der Welle 14 ab. Das Abschottblech 17 mit Ventilatoren 15 ist analog zur Ausbildung als Abnahmetrommel gestellfest angeordnet. Ein Leitblech 22 ist im nichtbogenführenden Bereich der Transfertrommel im oberen Kreissektor (Fig. 2) angeordnet.As mentioned above, the design is not limited to the take-up drum which interacts with rotating gripper systems 3. Rather, the drum 1 can also be designed as a transfer drum with gripper bridges fixedly arranged on the circumference. The structure is equivalent to the take-up drum according to FIG. 4. The drum jacket 13 is supported on the shaft 14 when it is designed as a transfer drum. The partition plate 17 with fans 15 is arranged fixed to the frame, analogous to the design as a removal drum. A baffle 22 is arranged in the area of the transfer drum that does not lead to the bend in the upper circular sector (FIG. 2).

In einer Weiterbildung ist neben der Bogenführung eine Trocknungsfunktion für den Bogen mittels der Trommel 1 erzielbar. Dazu ist gem. Fig. 5 , vorzugsweise jedem Ventilator 15 ein Heizelement 24 benachbart nachgeordnet. Dabei ist das Heizelement 24 fest am Abschottblech 17 vor dem Kettenrad 19 angeordnet. Das Heizelement 24 ist beispielsweise als Heizdrahtelement ausgeführt, welches schaltungstechnisch mit der Maschinensteuerung gekoppelt und bei Bedarf zuschaltbar ist.In a development, in addition to the sheet guide, a drying function for the sheet can be achieved by means of the drum 1. According to Fig. 5, preferably a heating element 24 adjacent to each fan 15. The heating element 24 is fixedly arranged on the partition plate 17 in front of the sprocket 19. The heating element 24 is designed, for example, as a heating wire element, which is connected to the machine control in terms of circuitry and can be switched on if required.

Die Wirkungsweise ist wie folgt:
Ein Bogen 2 wird von einem Druckmaschinenzylinder 10 an die Trommel 1 übergeben. Die Ventilatoren 15 haben mit Inbetriebnahme der Druckmaschine ein rotierendes Luftkissen am Trommelmantel 13 aufgebaut, so daß der Bogen berührungsfrei auf dem Trommelmantel 13 geführt wird. Je nach Ausführung des Druckes auf dem Bogen 2 als Schön- oder Schön- und Widerdruck werden die der Trommel 1 zugeordneten Bogenleiteinrichtungen 8 mit Blasluft (bei Schön- und Widerdruck) oder mit Saugluft (bei Schöndruck) beaufschlagt. Der Bogen 2 wird von der Trommel 1 umgeführt und bei Ausbildung als Abnahmetrommel vom Greifersystem 3 zum Auslegerstapel 5 geführt. Bei Ausbildung als Transfertrommel wird der im Greiferschluß geführte Bogen 2 an einen in Bogenlaufrichtung 9 nachgeordneten Druckmaschinenzylinder 10 übergeben. Der Trommelmantel 13 rotiert dabei während die Abschottbleche 17 mit Ventilatoren 15 feststehen. Zwischen Trommelmantel 13 und Abschottblech 17 ist ein kleiner Spalt. Der Antrieb des Trommelmantels 13 erfolgt bei Ausbildung als Abnahmetrommel über das umlaufende Kettenrad 19. Bei Ausbildung als Transfertrommel erfolgt der Antrieb über den Maschinenantrieb und die Welle 14.The mode of action is as follows:
A sheet 2 is transferred from a printing press cylinder 10 to the drum 1. When the printing machine was started up, the fans 15 built up a rotating air cushion on the drum casing 13 so that the sheet is guided on the drum casing 13 without contact. Depending on the execution of the print on the sheet 2 as a perfect or reverse print, the sheet guide devices 8 assigned to the drum 1 are supplied with blown air (with perfect and reverse printing) or with suction air (with straight printing). The sheet 2 is deflected by the drum 1 and, if it is designed as a take-up drum, is guided from the gripper system 3 to the delivery stack 5. When configured as a transfer drum, the sheet 2 guided in the gripper closure is transferred to a printing press cylinder 10 arranged downstream in the sheet travel direction 9. The drum jacket 13 rotates while the partition plates 17 are fixed with fans 15. There is a small gap between the drum jacket 13 and the bulkhead 17. When the drum casing 13 is designed as a take-up drum, it is driven by the rotating sprocket 19. When it is designed as a transfer drum, it is driven by the machine drive and the shaft 14.

Wird beispielsweise auf den Bogen ein Lack aufgetragen, so kann die Trocknungszeit durch Zuschaltung der Heizelemente 24 verkürzt werden. Die der Trommel 1 zugeführte Luft wird dabei erhitzt und tritt aus den Öffnungen 23 des Trommelmantels 13 aus. Für die Trocknungsfunktion werden die Ventilatoren 15 auf Blasluft umgeschaltet.If, for example, a varnish is applied to the sheet, the drying time can be shortened by switching on the heating elements 24. The air supplied to the drum 1 is heated and emerges from the openings 23 of the drum shell 13. For the drying function, the fans 15 are switched to blown air.

BezugszeichenlisteReference list

11
Trommeldrum
22nd
Bogenbow
33rd
GreifersystemGripper system
44th
KettenfördersystemChain conveyor system
55
AuslegerstapelBoom stack
66
Gestellframe
77
BogenbremseinheitBow brake unit
88th
BogenleiteinrichtungSheet guiding device
99
BogenlaufrichtungDirection of sheet travel
1010th
DruckmaschinenzylinderPrinting press cylinder
1111
GummituchzylinderBlanket cylinder
1212th
PlattenzylinderPlate cylinder
1313
TrommelmantelDrum jacket
1414
Wellewave
1515
Ventilatorfan
1616
VerbindungsstückConnector
1717th
AbschottblechBulkhead
1818th
KetteChain
1919th
KettenradSprocket
2020th
Durchbruchbreakthrough
2121
Flanschflange
2222
LeitblechBaffle
2323
Öffnungenopenings
2424th
HeizelementHeating element

Claims (5)

Bogenführende Trommel für eine Druckmaschine mit einem mit Öffnungen versehenen Trommelmantel und mit Mitteln zum Zuführen von Blasluft ins Innere der Trommel zwecks Erzeugung eines Luftpolsters auf dem Trommelmantel zur Verhinderung des Abschmierens von bedruckten Bogen,
dadurch gekennzeichnet,
daß zum rotierbaren Trommelmantel (13) stirnseitig Abschottbleche (17) mit über eine elektrische Spannungsversorgung gekoppelten, auf Blas-/Saugluft umschaltbare Ventilatoren (15) gestellfest angeordnet sind und die Abschottbleche (17) Durchbrüche (20) aufweisen zum Eintritt der von Ventilatoren (15) erzeugten Blasluft ins Innere oder Saugluft aus dem Inneren des Trommelmantels (13).Sheet-guiding drum for a printing press with an apertured drum jacket and with means for supplying blown air into the interior of the drum in order to create an air cushion on the drum jacket to prevent printed sheets from smearing,
characterized,
that the rotatable drum jacket (13) has end shields (17) with fans (15) coupled to an electrical voltage supply and switchable to blowing / suction air, and the partition plates (17) have openings (20) for the entry of fans (15 ) generated blown air into the interior or suction air from the inside of the drum shell (13). Bogenführende Trommel nach Anspruch 1,
dadurch gekennzeichnet,
daß die Trommel (1) als Abnahmetrommel eines Auslegers zwischen Abschottblech (17) und Trommelmantel (13) ein auf einer Welle (14) fixiertes, umlaufendes Kettenrad (19) mit Durchbrüchen (20) aufweist, an dem der Trommelmantel (13) befestigt ist.Sheet guiding drum according to claim 1,
characterized,
that the drum (1) as a take-off drum of a boom between the bulkhead (17) and the drum shell (13) has a rotating sprocket (19) with openings (20) fixed on a shaft (14), to which the drum shell (13) is attached . Bogenführende Trommel nach Anspruch 1,
dadurch gekennzeichnet,
daß die Trommel (1) als Transfertrommel einen an der Welle (14) fixierten Trommelmantel (13) aufweist.Sheet guiding drum according to claim 1,
characterized,
that the drum (1) as a transfer drum has a drum jacket (13) fixed to the shaft (14). Bogenführende Trommel nach Anspruch 1,
dadurch gekennzeichnet,
daß dem nichtbogenführenden Bereich des Trommelmantels (13) im Inneren der Trommel (1) ein geschlossenes Leitblech (22) gestellfest zugeordnet ist.Sheet guiding drum according to claim 1,
characterized,
that a closed baffle (22) is assigned to the non-arc-guiding region of the drum jacket (13) inside the drum (1) in a frame-fixed manner. Bogenführende Trommel nach Anspruch 1 und 2,
dadurch gekennzeichnet,
daß dem Ventilator (15) vor dem Kettenrad (19) ein Heizelement (24) benachbart nachgeordnet ist.Sheet guiding drum according to claim 1 and 2,
characterized,
that the fan (15) is arranged in front of the sprocket (19) adjacent to a heating element (24).
EP96118805A 1996-03-23 1996-11-23 Sheet transfer cylinder for a printing machine Expired - Lifetime EP0796734B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19611590A DE19611590C1 (en) 1995-12-15 1996-03-23 Sheet guiding drum for a printing machine
DE19611590 1996-03-23

Publications (2)

Publication Number Publication Date
EP0796734A1 true EP0796734A1 (en) 1997-09-24
EP0796734B1 EP0796734B1 (en) 1999-05-26

Family

ID=7789246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118805A Expired - Lifetime EP0796734B1 (en) 1996-03-23 1996-11-23 Sheet transfer cylinder for a printing machine

Country Status (2)

Country Link
EP (1) EP0796734B1 (en)
AT (1) ATE180438T1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347886A1 (en) * 1983-08-06 1985-05-30 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Smear-free transfer drum for sheet-fed rotary printing machines
DE4223839C1 (en) 1992-07-20 1993-12-23 Heidelberger Druckmasch Ag Sheet guiding cylinder of a printing machine
DE4434778C1 (en) * 1994-09-29 1995-11-30 Roland Man Druckmasch Sheet guide between guide cylinder and drum in rotary printing press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347886A1 (en) * 1983-08-06 1985-05-30 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Smear-free transfer drum for sheet-fed rotary printing machines
DE3347886C2 (en) 1983-08-06 1988-08-18 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4223839C1 (en) 1992-07-20 1993-12-23 Heidelberger Druckmasch Ag Sheet guiding cylinder of a printing machine
DE4434778C1 (en) * 1994-09-29 1995-11-30 Roland Man Druckmasch Sheet guide between guide cylinder and drum in rotary printing press

Also Published As

Publication number Publication date
EP0796734B1 (en) 1999-05-26
ATE180438T1 (en) 1999-06-15

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