EP1319507B1 - Suction device for removing powder and hot air in a delivery device of a sheet-fed rotary printing machine - Google Patents

Suction device for removing powder and hot air in a delivery device of a sheet-fed rotary printing machine Download PDF

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Publication number
EP1319507B1
EP1319507B1 EP20020023704 EP02023704A EP1319507B1 EP 1319507 B1 EP1319507 B1 EP 1319507B1 EP 20020023704 EP20020023704 EP 20020023704 EP 02023704 A EP02023704 A EP 02023704A EP 1319507 B1 EP1319507 B1 EP 1319507B1
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EP
European Patent Office
Prior art keywords
suction
delivery device
sheet
powder
dusting
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EP20020023704
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German (de)
French (fr)
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EP1319507A3 (en
EP1319507A2 (en
Inventor
Hans Zimmermann
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Koenig and Bauer AG
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Koenig and Bauer AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F23/00Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/06Powdering devices, e.g. for preventing set-off

Definitions

  • the invention relates to a device for powder and hot air extraction, which is used in the delivery of sheet-fed rotary printing presses.
  • the invention relates to a boom of a sheet-fed rotary printing machine with a device for powder and air extraction, wherein in the boom sprockets are provided to rotate around the chains with these associated gripper carriage and a dusting device and / or a drying device between the conveyor and the back of the chains and a sheet guiding device are arranged below the conveying run of the chains.
  • a device of this kind is the DE 198 26 083 A1 removable.
  • the existing in the boom excess hot air can be sucked in the solution mentioned together with a portion of the powder / air mixture on the openings provided in the sheet guide.
  • a powder barrier extending over the width of the cantilever is provided in the region of the impression cylinder and a further powder barrier is provided on the empty strand.
  • the disadvantage of this solution is that the powder applied to the upper side of the printing material is sucked off only to a small extent by the openings arranged on the other printing material side. As a result of the suction caused by the movement of the gripper carriage, a large part of the powder / air mixture initially spreads in an uncontrolled manner in the boom until it is removed from the powder barrier.
  • a dusting device in which excess powder is absorbed by a downstream in the sheet running direction of the powder nozzle suction channel.
  • a nozzle row is also provided, from which emerges at an acute angle to the printing surface blowing air.
  • excess powder / air mixture can be sucked only from the top of the substrate.
  • the part of the excess powder that passes through this barrier can be freely distributed in the boom and in the wake of the returning gripper carriage still reach other units of the printing press, such as coating unit or printing units.
  • the DE 199 08 266 A1 discloses a Puderabsaug adopted for keeping clean and / or cleaning a sheet delivery, which is arranged between the empty and conveying run and on the side facing the empty strand has an opening for Puderabsaugung.
  • This device can be arranged below a blowing device, with which air is sucked from outside the boom and conveyed into the boom interior. This creates an air flow on the empty strand side of the chain, whereby at this point the spread of the powder / air mixture in the direction of pressure cylinder is prevented.
  • a disadvantage of this solution is that the excess, not adhering to the sheet powder can propagate unhindered in the boom until it is sucked off.
  • the powder / air mixture promoted by the movements resulting from the chain movement, can reach the impression cylinder starting from the side of the pollination device facing the printing cylinder.
  • the powder / air mixture is removed from the interior of the boom in an advantageous manner, at the same time the excess hot air is disposed of.
  • the currents generated by a plurality of suction devices for the extraction of hot air are combined to form an exhaust air flow.
  • the boom is both above and below the funded signatures adhering to the parts of the boom powder dust or sucked with powder interspersed air, whereby most of the excess powder is removable.
  • an additional powder barrier is provided, which advantageously prevents powder adhering to the gripper carriage and is transported by these or by the caused by the movement of the gripper carriage air flow to the printing unit.
  • the flow velocities necessary for effective extraction of the powder can be achieved in an energy-saving manner, since the suction devices for extracting the powder on the top side of the printed sheet act largely rectified to one another.
  • the efficiency of Puderabsaugung is advantageously further improved by the first Abschott founded is arranged to the inserted auxiliary equipment for powdering or drying, that forms a suction channel on the empty strand side.
  • the adjacent suction power creates an air flow, which is approximately parallel to the chain center line in the region of the suction opening approximately perpendicular to the chain centerline and at a greater distance to the suction port.
  • the flow is directed in the opposite direction to the movement of the empty cylinder back-running gripper carriage on the side facing the pressure cylinder suction.
  • the single drawing shows a sheet delivery and indicated the stack of sheets produced by him 5.
  • the sheets to be transported 17 are fixed to the gripper carriage 7 on gripper covers, not shown, fed to the stack of sheets 5 on the winningtrumseite the chains 4 and braked by means of a suction roller 6.
  • Below the conveying strand 4 and thus below the sheet conveying path extending sheet guide plates 10 are arranged along the arc path. These serve for bowing and have openings.
  • a continuous sheet baffle 10 may be provided.
  • the considered in sheet running direction last sheet guide plate 10 may be designed to be displaceable together with the suction roll, whereby an adaptation to changing formats is possible.
  • the openings of the sheet guide plates 10 are connected to a vacuum source.
  • each may be assigned a separate vacuum source.
  • Axial fans are used as a source of negative pressure. The air discharged from the print sheet by several axial fans can be brought together and conveyed from the boom via a central extraction system. Through the openings of the sheet guide plates 10 so that a large part of the voltage applied in the boom excess heat is dissipated.
  • the first Abschott Vietnamese 12 has a suction opening 14, via which by means of a suction, not shown, for example in the form of an axial fan, the powder / air mixture and the hot air from the interior are sucked.
  • a suction not shown, for example in the form of an axial fan
  • the powder / air mixture and the hot air from the interior are sucked.
  • the space between conveyor and slack side 4, 3 also takes on a pollination device 9 and / or a drying device 11.
  • the pollination device 9 is formed by a powder nozzle strip 8, a bell 18 which surrounds it, which is open to the conveying strand 4, and a second suction device 15.2.
  • the second suction device 15.2 is viewed in the conveying direction behind the powder nozzle strip 8 and extends transversely to the sheet conveying direction over the machine width.
  • the powder nozzle strip 8 is sealed with respect to the second suction device 15.2 so that the discharged powder is sucked from the powder only in the areas of the sheet that have left the powder zone.
  • the dusting device 9 and the drying device 11 have an outer shape which makes it possible to insert them into the side walls of the boom, in which recesses are provided for this purpose.
  • the recesses are arranged so that the second Abschott recognized 13 adjacent to the inserted pollination device 9. Seals may be provided between the two devices.
  • recesses for receiving the pollination device 9 and / or the drying device 11 are provided.
  • the pollination device 9 can be inserted over the recesses in the side walls, so that it is enclosed on all sides parallel to the sheet conveying plane by the second Abschott immunity 13.
  • the conveyed in the gripper closure sheet 17 is withdrawn from the printing cylinder and conveyed in the direction sheet pile 5. With the achievement of the sheet guide plates 10, it is sucked from its underside through the openings in the sheet guide plates 10 and thus guided on the sheet guide plates 10. On the upper side of the printed sheet 17, the radiation of the drying device 11 acts and heats it. This also heats the air surrounding the printed sheet 17, which is discharged to the sheet 17 through the sheet guide plates 10. When the printing sheet 17 has reached the powder nozzle row 8, it is dusted by this with powder.
  • Powder which has reached the gripper carriage 7, powder not adhering to the print sheet 17 is sucked off in the further course by the second suction device 15.2, which is arranged directly above the gripper carriage path. Due to the turbulent flow generated by the movement of the gripper carriage 7 17 remaining powder is whirled over the print sheet, so that a powder / air mixture is formed. This is then sucked off by the first suction device 15.1, which is arranged at a greater distance to the sheet conveying plane than the second suction device 15.2.
  • the air flow generated by the first and second suction means 15.1, 15.2 is then passed out of the boom through the suction opening 14 under the action of another suction not shown in the drawing. This results in a large flow velocity, since the suction devices 15.1, 15.2 and the suction not shown act rectified and thus add the suction power.
  • the air flow high flow velocity acts as a powder barrier against the paint or impression cylinder.
  • the first Abschott acquired 12 forms together with the second Abschott Road 13, the pollination device 9 and the drying device 11 a suction channel.
  • this suction channel there is a largely parallel to the catenary flow, which is directed in the opposite direction to the movement of the back empty gripper carriage above the drying device.
  • All flows from the boom are combined by means of an exhaust system and passed through a powder separator where the powder is removed from the powder / air mixture.
  • the first Abschott raised may be partially made rotatable about the pivot axis.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Puder- und Warmluftabsaugung, die im Ausleger von Bogenrotationsdruckmaschinen eingesetzt wird.The invention relates to a device for powder and hot air extraction, which is used in the delivery of sheet-fed rotary printing presses.

Bei schnelllaufenden Druckmaschinen mit einer Vielzahl von Farbwerken und zusätzlichen Lackiereinrichtungen ist der in der Auslage ankommende, frisch bedruckte Bogen zumeist noch nicht ausgetrocknet. Damit es infolge der mechanischen Beanspruchungen, die der Druckbogen erfährt, und des im Auslagestapel herrschenden Druckes nicht zu einer Qualitätsminderung in Form von Abschmieren oder Blocken kommt, werden in der Auslage Bestäubungseinrichtungen und Trocknungseinrichtungen eingesetzt. Als Trockeneinrichtungen finden häufig Infrarottrockner Verwendung. Mittels der Bestäubungseinrichtungen wird Puder geringer Korngröße gleichmäßig über den Bogen verteilt, welches am Bogen anhaftet. Die mit dem Trockner in die Auslage eingebrachte Wärme muss an geeigneter Stelle entfernt werden, da es sonst zur Überhitzung kommt. Überschüssiges Puder kann neben den Greifern auch ein vorgelagertes Lackwerk oder die Druckwerke verschmutzen und zu Qualitätsbeeinträchtigungen führen.In fast-running printing presses with a large number of inking units and additional coating devices, the freshly printed sheets arriving in the delivery are in most cases not yet dried out. So that it does not come to a reduction in quality in the form of greasing or blocking due to the mechanical stresses that the sheet undergoes, and the pressure prevailing in the delivery stack, pollination facilities and drying facilities are used in the display. Dryers often use infrared dryers. By means of the dusting means powder of small grain size is evenly distributed over the sheet which adheres to the sheet. The heat introduced into the delivery with the dryer must be removed at a suitable place, otherwise overheating will occur. Excess powder can pollute not only the grippers but also an upstream coating unit or the printing units and lead to quality impairments.

Gegenstand der Erfindung ist ein Ausleger einer Bogenrotationsdruckmaschine mit einer Einrichtung zur Puder- und Luftabsaugung , wobei im Ausleger Kettenräder vorgesehen sind, um die Ketten mit diesen zugeordneten Greiferwagen umlaufen und eine Bestäubungseinrichtung und/oder eine Trockeneinrichtung zwischen dem Förder- und dem Leertrum der Ketten und eine Bogenleiteinrichtung unterhalb des Fördertrums der Ketten angeordnet sind.The invention relates to a boom of a sheet-fed rotary printing machine with a device for powder and air extraction, wherein in the boom sprockets are provided to rotate around the chains with these associated gripper carriage and a dusting device and / or a drying device between the conveyor and the back of the chains and a sheet guiding device are arranged below the conveying run of the chains.

Eine Einrichtung dieser Art ist der DE 198 26 083 A1 entnehmbar. Die im Ausleger vorhandene überschüssige Warmluft kann bei der genannten Lösung zusammen mit einem Teil des Puder/Luftgemischs über die im Bogenleitblech vorgesehenen Öffnungen abgesaugt werden. Zudem ist eine sich über die Breite des Auslegers erstreckende Pudersperre im Bereich des Druckzylinders und eine weitere Pudersperre am Leertrum vorgesehen. Nachteilig ist an dieser Lösung, dass das auf der Oberseite des Bedruckstoffs aufgebrachte Puder durch die auf der anderen Bedruckstoffseite angeordneten Öffnungen nur zu einem geringen Teil abgesaugt wird. Infolge des durch die Bewegung der Greiferwagen verursachten Soges breitet sich ein Großteil des Puder/Luftgemischs zunächst unkontrolliert im Ausleger aus, bis es von der Pudersperre entfernt wird.A device of this kind is the DE 198 26 083 A1 removable. The existing in the boom excess hot air can be sucked in the solution mentioned together with a portion of the powder / air mixture on the openings provided in the sheet guide. In addition, a powder barrier extending over the width of the cantilever is provided in the region of the impression cylinder and a further powder barrier is provided on the empty strand. The disadvantage of this solution is that the powder applied to the upper side of the printing material is sucked off only to a small extent by the openings arranged on the other printing material side. As a result of the suction caused by the movement of the gripper carriage, a large part of the powder / air mixture initially spreads in an uncontrolled manner in the boom until it is removed from the powder barrier.

Gemäß der DE 42 07 118 A1 ist ein Bestäubungsgerät bekannt, bei dem überschüssiges Puder von einem in Bogenlaufrichtung der Puderdüse nachgeordneten Saugkanal aufgenommen wird. Um den Austritt vom Puder/Luftgemisch aus dem Bestäubungsgerät zu verhindern, ist zudem eine Düsenreihe vorgesehen, aus der im spitzen Winkel zu der Bedruckstoffoberfläche Blasluft austritt. Mit Hilfe der Einrichtung kann überschüssiges Puder/Luftgemisch nur von der Oberseite des Bedruckstoffs abgesaugt werden. Der Teil des überschüssigen Puders, der diese Sperre passiert, kann sich ungehindert im Ausleger verteilen und im Sog der rücklaufenden Greiferwagen noch andere Aggregate der Druckmaschine, wie Lackwerk oder Druckwerke, erreichen.According to the DE 42 07 118 A1 a dusting device is known in which excess powder is absorbed by a downstream in the sheet running direction of the powder nozzle suction channel. In order to prevent the escape of the powder / air mixture from the dusting device, a nozzle row is also provided, from which emerges at an acute angle to the printing surface blowing air. With the help of the device excess powder / air mixture can be sucked only from the top of the substrate. The part of the excess powder that passes through this barrier can be freely distributed in the boom and in the wake of the returning gripper carriage still reach other units of the printing press, such as coating unit or printing units.

Die DE 199 08 266 A1 offenbart eine Puderabsaugeinrichtung zum Sauberhalten und/oder Reinigen einer Bogenauslage, die zwischen Leer- und Fördertrum angeordnet ist und auf der dem Leertrum zugewandten Seite eine Öffnung zur Puderabsaugung aufweist. Diese Einrichtung kann unterhalb einer Blaseinrichtung angeordnet sein, mit welcher Luft von außerhalb des Auslegers angesaugt und in das Auslegerinnere gefördert wird. Damit entsteht eine Luftströmung auf der Leertrumseite der Kette, wodurch an dieser Stelle die Ausbreitung des Puder/Luftgemischs in Richtung Druckzylinder verhindert wird. Nachteilig ist an dieser Lösung, dass sich das überschüssige, nicht am Bogen anhaftende Puder ungehindert im Ausleger ausbreiten kann, bis es abgesaugt wird. Zudem kann das Puder/Luftgemisch, gefördert von den sich aus der Kettenbewegung ergebenden Strömungen, von der dem Druckzylinder zugewandten Seite der Bestäubungseinrichtung ausgehend den Druckzylinder erreichen.The DE 199 08 266 A1 discloses a Puderabsaugeinrichtung for keeping clean and / or cleaning a sheet delivery, which is arranged between the empty and conveying run and on the side facing the empty strand has an opening for Puderabsaugung. This device can be arranged below a blowing device, with which air is sucked from outside the boom and conveyed into the boom interior. This creates an air flow on the empty strand side of the chain, whereby at this point the spread of the powder / air mixture in the direction of pressure cylinder is prevented. A disadvantage of this solution is that the excess, not adhering to the sheet powder can propagate unhindered in the boom until it is sucked off. In addition, the powder / air mixture, promoted by the movements resulting from the chain movement, can reach the impression cylinder starting from the side of the pollination device facing the printing cylinder.

Ausgehend von den genannten Nachteilen ist es Aufgabe der Erfindung, eine Vorrichtung zu schaffen, mit der die überschüssige Warmluft aus dem Ausleger entfernt und die Verschmutzung der Aggregate der Druckmaschine durch Puder vermindert werden kann.Based on the disadvantages mentioned, it is an object of the invention to provide a device with which the excess hot air removed from the boom and the pollution of the aggregates of the printing press can be reduced by powder.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen sind in den Unteransprüchen enthalten.This object is achieved by the features of claim 1. Further advantageous embodiments are contained in the subclaims.

Durch die Erfindung wird in vorteilhafter Weise das Puder/Luftgemisch aus dem Inneren des Auslegers entfernt, wobei gleichzeitig die überschüssige Warmluft entsorgt wird. Die zur Absaugung der Warmluft von mehreren Absaugeinrichtungen erzeugten Strömungen werden dazu zu einer Abluftströmung zusammengefasst. Im Ausleger wird sowohl oberhalb wie auch unterhalb der geförderten Druckbögen der an den Teilen des Auslegers anhaftende Puderstaub oder die mit Puder durchsetzte Luft abgesaugt, wodurch der größte Teil des überschüssigen Puders entfernbar ist.
Auf der Leertrumseite der Kette ist eine zusätzliche Pudersperre vorgesehen, die in vorteilhafter Weise verhindert, dass Puder an den Greiferwagen haften bleibt und von diesen oder durch die von der durch die Bewegung der Greiferwagens verursachten Luftströmung zum Druckwerk transportiert wird.
Die für eine effektvolle Absaugung des Puders notwendigen Strömungsgeschwindigkeiten können in energiesparender Weise erreicht werden, da die Saugeinrichtungen zur Absaugung des Puders auf der Druckbogenoberseite weitgehend gleichgerichtet zueinander wirken. Der Wirkungsgrad der Puderabsaugung wird vorteilhaft weiter verbessert, indem die erste Abschotteinrichtung so zu den eingeschobenen Zusatzeinrichtungen zum Pudern oder Trocknen angeordnet ist, dass sich auf der Leertrumseite ein Saugkanal bildet. Infolge der anliegenden Saugleistung entsteht eine Luftströmung, die im Bereich der Absaugöffnung annähernd senkrecht zur Kettenmittellinie und in größerem Abstand zur Ansaugöffnung annähernd parallel zur Kettenmittellinie verläuft. Die Strömung ist auf der dem Druckzylinder zugewandten Seite der Absaugöffnung gegensinnig zur Bewegung der leertrumseitig zurücklaufenden Greiferwagen gerichtet. Damit ist auch der zum Druckzylinder zurücklaufende Greiferwagen und das ihn in Resten umgebende Puder/Luftgemisch auf einem langen Stück der Greiferwagenbahn der Strömungswirkung ausgesetzt.
Insgesamt ist der Auslegerinnenraum von Absaugströmungen durchzogen, die den größten Teil des umschlossenen Volumens erreichen und damit effektiv das Puder/Luftgemisch und die vorhandene überschüssige Wärme entfernen.
By the invention, the powder / air mixture is removed from the interior of the boom in an advantageous manner, at the same time the excess hot air is disposed of. The currents generated by a plurality of suction devices for the extraction of hot air are combined to form an exhaust air flow. In the boom is both above and below the funded signatures adhering to the parts of the boom powder dust or sucked with powder interspersed air, whereby most of the excess powder is removable.
On the empty strand side of the chain an additional powder barrier is provided, which advantageously prevents powder adhering to the gripper carriage and is transported by these or by the caused by the movement of the gripper carriage air flow to the printing unit.
The flow velocities necessary for effective extraction of the powder can be achieved in an energy-saving manner, since the suction devices for extracting the powder on the top side of the printed sheet act largely rectified to one another. The efficiency of Puderabsaugung is advantageously further improved by the first Abschotteinrichtung is arranged to the inserted auxiliary equipment for powdering or drying, that forms a suction channel on the empty strand side. As a result of the adjacent suction power creates an air flow, which is approximately parallel to the chain center line in the region of the suction opening approximately perpendicular to the chain centerline and at a greater distance to the suction port. The flow is directed in the opposite direction to the movement of the empty cylinder back-running gripper carriage on the side facing the pressure cylinder suction. Thus, the gripper carriage returning to the printing cylinder and the powder / air mixture surrounding it in remnants are exposed to the flow effect on a long piece of the gripper carriage track.
Overall, the boom interior is traversed by exhaust flows that reach most of the enclosed volume, effectively removing the powder / air mixture and excess heat present.

Anhand des nachfolgend angeführten Ausführungsbeispiels soll die Erfindung näher beschrieben werden.Reference to the following embodiment, the invention will be described in more detail.

Die einzige Zeichnung zeigt einen Bogenausleger und angedeutet den von ihm erzeugten Bogenstapel 5. Zwischen Paaren von oberen und unteren Kettenrädern 1,2 laufen Ketten um, denen'im gleichmäßigen Abstand Greiferwagen 7 zugeordnet sind. Die zu transportierenden Bögen 17 werden an den Greiferwagen 7 auf nicht dargestellten Greiferaufschlägen fixiert, dem Bogenstapel 5 auf der Fördertrumseite der Ketten 4 zugeführt und mit Hilfe einer Saugwalze 6 abgebremst. Auf der Leertrumseite der Ketten 3 erfolgt die Rückführung der Greiferwagen 7 zu einem nicht dargestellten Druckzylinder oder Lackzylinder. Unterhalb des Fördertrums 4 und damit unterhalb des Bogenförderweges sind sich entlang des Bogenweges erstreckende Bogenleitbleche 10 angeordnet. Diese dienen der Bogenführung und weisen Öffnungen auf. Anstatt von mehreren einzelnen kann auch ein durchgehendes Bogenleitblech 10 vorgesehen sein. Das in Bogenlaufrichtung betrachtete letzte Bogenleitblech 10 kann zusammen mit der Saugwalze verschiebbar ausgeführt sein, womit eine Anpassung an wechselnde Formate möglich wird. Die Öffnungen der Bogenleitbleche 10 sind mit einer Unterdruckquelle verbunden. Bei einer Variante mit mehreren Bogenleitblechen 10 kann jedem eine separate Unterdruckquelle zugeordnet sein. Als Unterdruckquelle finden Axiallüfter Verwendung. Die von mehreren Axiallüftern vom Druckbogen abgeführte Luft kann zusammengeführt und über eine zentrale Absaugung aus dem Ausleger gefördert werden. Durch die Öffnungen der Bogenleitbleche 10 wird damit ein großer Teil der im Ausleger anliegenden Überschusswärme abgeführt. In den Bereichen des Bogenleitblechs 10, die der Bestäubungseinrichtung 9 gegenüberliegen oder die sich in Bogenlaufrichtung betrachtet an diese Bereiche anschließen, wird zusammen mit der Warmluft der in ihr enthaltene Puderstaub abgesaugt.
Oberhalb des Leertrums der Kette 3 ist eine erste Abschotteinrichtung 12 angeordnet. Die erste Abschotteinrichtung 12 ist zwischen die Seitenwände des Auslegers eingepasst und gegenüber den Seitenwänden abgedichtet. In Bogenlaufrichtung erstreckt sie sich bei der bevorzugten Ausführungsform in dem Bereich von unterem Kettenrad 2 bis zur Saugwalze 6. Eine längere Ausführung ist ebenfalls möglich. Die erste Abschotteinrichtung 12 weist eine Absaugöffnung 14 auf, über die mit Hilfe einer nicht dargestellten Absaugung, z.B. in Form eines Axiallüfters, das Puder/Luftgemisch und die Warmluft aus dem Innenraum absaugbar sind.
Mit der Anordnung der ersten Abschotteinrichtung 12 bildet sich ein die Transportzone umschließender Schacht, der seitlich von den Auslegerwänden auf seiner Oberseite von der sich über die Auslegerbreite erstreckenden ersten Abschotteinrichtung 12 und auf seiner Unterseite von den Bogenleitblechen 10 begrenzt wird.
Zwischen dem Förder- und Leertrum 4, 3 ist eine zweite Abschotteinrichtung 13 angeordnet, die sich ebenfalls über die Breite des Auslegers erstreckt. Die zweite Abschotteinrichtung 13 weist eine, sich quer zur Bogenlaufrichtung erstreckende erste Absaugeinrichtung 15.1 auf. Der Raum zwischen Förder- und Leertrum 4, 3 nimmt zudem noch eine Bestäubungseinrichtung 9 und/oder eine Trockeneinrichtung 11 auf. Die Bestäubungseinrichtung 9 wird von einer Puderdüsenleiste 8, einer sie umgebenden, zum Fördertrum 4 offenen Glocke 18 und einer zweiten Absaugeinrichtung 15.2 gebildet.
Die zweite Absaugeinrichtung 15.2 ist in Förderrichtung betrachtet hinter der Puderdüsenleiste 8 angeordnet und erstreckt sich quer zur Bogenförderrichtung über die Maschinenbreite. Die Puderdüsenleiste 8 ist gegenüber der zweiten Absaugeinrichtung 15.2 so abgedichtet, dass das ausgebrachte Puder erst in den Bereichen des Druckbogens von diesem abgesaugt wird, die die Puderzone verlassen haben.
The single drawing shows a sheet delivery and indicated the stack of sheets produced by him 5. Between pairs of upper and lower sprockets 1.2 run chains to which 'uniformly spaced gripper carriage 7 are assigned. The sheets to be transported 17 are fixed to the gripper carriage 7 on gripper covers, not shown, fed to the stack of sheets 5 on the Fördertrumseite the chains 4 and braked by means of a suction roller 6. On the empty strand side of the chains 3, the return of the gripper carriage 7 takes place to a pressure cylinder or paint cylinder, not shown. Below the conveying strand 4 and thus below the sheet conveying path extending sheet guide plates 10 are arranged along the arc path. These serve for bowing and have openings. Instead of several individual can also be a continuous sheet baffle 10 may be provided. The considered in sheet running direction last sheet guide plate 10 may be designed to be displaceable together with the suction roll, whereby an adaptation to changing formats is possible. The openings of the sheet guide plates 10 are connected to a vacuum source. In a variant with a plurality of sheet guide plates 10 each may be assigned a separate vacuum source. Axial fans are used as a source of negative pressure. The air discharged from the print sheet by several axial fans can be brought together and conveyed from the boom via a central extraction system. Through the openings of the sheet guide plates 10 so that a large part of the voltage applied in the boom excess heat is dissipated. In the areas of the sheet guide plate 10 which are opposite to the pollination device 9 or which, viewed in the sheet running direction, adjoin these areas, the powder dust contained in it is sucked off together with the hot air.
Above the slack side of the chain 3, a first Abschotteinrichtung 12 is arranged. The first Abschotteinrichtung 12 is fitted between the side walls of the boom and sealed against the side walls. In the sheet travel direction, it extends in the preferred embodiment in the range of lower sprocket 2 to the suction roller 6. A longer version is also possible. The first Abschotteinrichtung 12 has a suction opening 14, via which by means of a suction, not shown, for example in the form of an axial fan, the powder / air mixture and the hot air from the interior are sucked.
With the arrangement of the first Abschotteinrichtung 12 forms a transport zone enclosing shaft, which is laterally bounded by the cantilever walls on its upper side of the cantilever width extending over the first Abschotteinrichtung 12 and on its underside of the sheet guide plates 10.
Between the conveyor and slack side 4, 3 a second Abschotteinrichtung 13 is arranged, which also extends over the width of the boom. The second Abschotteinrichtung 13 has a, extending transversely to the sheet running direction first suction 15.1. The space between conveyor and slack side 4, 3 also takes on a pollination device 9 and / or a drying device 11. The pollination device 9 is formed by a powder nozzle strip 8, a bell 18 which surrounds it, which is open to the conveying strand 4, and a second suction device 15.2.
The second suction device 15.2 is viewed in the conveying direction behind the powder nozzle strip 8 and extends transversely to the sheet conveying direction over the machine width. The powder nozzle strip 8 is sealed with respect to the second suction device 15.2 so that the discharged powder is sucked from the powder only in the areas of the sheet that have left the powder zone.

Die Bestäubungseinrichtung 9 und die Trockeneinrichtung 11 weisen eine äußere Gestalt auf, die es ermöglicht, sie in die Seitenwände des Auslegers einzuschieben, in denen zu diesem Zweck Aussparungen vorgesehen sind.
Die Aussparungen sind so angeordnet, dass die zweite Abschotteinrichtung 13 an die eingeschobene Bestäubungseinrichtung 9 angrenzt. Zwischen beiden Einrichtungen können Dichtungen vorgesehen sein. Bei einer nicht dargestellten Ausführungsform mit verlängerter zweiter Abschotteinrichtung 13 sind Aussparungen zur Aufnahme der Bestäubungseinrichtung 9 und/oder der Trockeneinrichtung 11 vorgesehen. In diese kann dann z.B. die Bestäubungseinrichtung 9 über die Aussparungen in den Seitenwänden eingeschoben werden, so dass sie parallel zur Bogenförderebene allseitig von der zweiten Abschotteinrichtung 13 umschlossen ist.
The dusting device 9 and the drying device 11 have an outer shape which makes it possible to insert them into the side walls of the boom, in which recesses are provided for this purpose.
The recesses are arranged so that the second Abschotteinrichtung 13 adjacent to the inserted pollination device 9. Seals may be provided between the two devices. In an embodiment not shown with extended second Abschotteinrichtung 13 recesses for receiving the pollination device 9 and / or the drying device 11 are provided. In this example, then the pollination device 9 can be inserted over the recesses in the side walls, so that it is enclosed on all sides parallel to the sheet conveying plane by the second Abschotteinrichtung 13.

Nachfolgend wird die Wirkungsweise der Erfindung beschrieben.
Der im Greiferschluss geförderte Druckbogen 17 wird vom Druckzylinder abgezogen und in Richtung Bogenstapel 5 gefördert. Mit dem Erreichen der Bogenleitbleche 10 wird er von seiner Unterseite durch die Öffnungen in den Bogenleitblechen 10 angesaugt und damit auf den Bogenleitblechen 10 geführt. Auf die Oberseite des Druckbogens 17 wirkt die Strahlung der Trockeneinrichtung 11 ein und erwärmt diesen. Damit erwärmt sich auch die den Druckbogen 17 umgebende Luft, die um den Druckbogen 17 durch die Bogenleitbleche 10 abgeführt wird. Wenn der Druckbogen 17 die Puderdüsenreihe 8 erreicht hat, wird er von dieser mit Puder bestäubt. Puder welches auf den Greiferwagen 7 gelangt ist, nicht auf dem Druckbogen 17 haftendes Puder wird im weiteren Verlauf von der zweiten Absaugeinrichtung 15.2, welche unmittelbar über dem Greiferwagenweg angeordnet ist, abgesaugt. Durch die von der Bewegung der Greiferwagen 7 erzeugte turbulente Strömung wird über dem Druckbogen 17 verbliebenes Puder aufgewirbelt, so dass sich ein Puder/Luftgemisch bildet. Dieses wird anschließend von der ersten Absaugungseinrichtung 15.1 abgesaugt, die in einem größeren Abstand zur Bogenförderebene angeordnet ist als die zweite Absaugeinrichtung 15.2.
Hereinafter, the operation of the invention will be described.
The conveyed in the gripper closure sheet 17 is withdrawn from the printing cylinder and conveyed in the direction sheet pile 5. With the achievement of the sheet guide plates 10, it is sucked from its underside through the openings in the sheet guide plates 10 and thus guided on the sheet guide plates 10. On the upper side of the printed sheet 17, the radiation of the drying device 11 acts and heats it. This also heats the air surrounding the printed sheet 17, which is discharged to the sheet 17 through the sheet guide plates 10. When the printing sheet 17 has reached the powder nozzle row 8, it is dusted by this with powder. Powder which has reached the gripper carriage 7, powder not adhering to the print sheet 17 is sucked off in the further course by the second suction device 15.2, which is arranged directly above the gripper carriage path. Due to the turbulent flow generated by the movement of the gripper carriage 7 17 remaining powder is whirled over the print sheet, so that a powder / air mixture is formed. This is then sucked off by the first suction device 15.1, which is arranged at a greater distance to the sheet conveying plane than the second suction device 15.2.

Die von der ersten und der zweiten Absaugeinrichtung 15.1, 15.2 erzeugte Luftströmung wird anschließend unter der Wirkung einer weiteren, in der Zeichnung nicht dargestellten Absaugung durch die Absaugöffnung 14 aus dem Ausleger geleitet. Dabei kommt es zu einer großen Strömungsgeschwindigkeit, da die Absaugeinrichtungen 15.1, 15.2 und die nicht dargestellte Absaugung gleichgerichtet wirken und sich die Saugleistungen somit addieren. Die Luftströmung hoher Strömungsgeschwindigkeit wirkt als Pudersperre gegenüber dem Lackoder Druckzylinder.The air flow generated by the first and second suction means 15.1, 15.2 is then passed out of the boom through the suction opening 14 under the action of another suction not shown in the drawing. This results in a large flow velocity, since the suction devices 15.1, 15.2 and the suction not shown act rectified and thus add the suction power. The air flow high flow velocity acts as a powder barrier against the paint or impression cylinder.

Die erste Abschotteinrichtung 12 bildet zusammen mit der zweiten Abschotteinrichtung 13, der Bestäubungseinrichtung 9 und der Trockeneinrichtung 11 einen Saugkanal. In diesem Saugkanal herrscht eine weitgehend parallel zur Kettenlinie verlaufende Strömung, die oberhalb der Trockeneinrichtung gegensinnig zur Bewegung der leertrumseitig zurücklaufenden Greiferwagen gerichtet ist.
Damit ist auch das im Sog des zurücklaufenden Greiferwagens befindliche Puder/Luftgemisch gehindert, das Lackwerk oder Druckwerk zu erreichen und wird, selbst wenn es die Pudersperre passiert hat, zurückgeführt und durch die Absaugöffnung 14 nach außen transportiert. Insgesamt ist der Auslegerinnenraum von Absaugströmungen durchzogen, die den größten Teil des umschlossenen Volumens erreichen und damit effektiv das Puder/Luftgemisch und die vorhandene überschüssige Wärme entfernen.
The first Abschotteinrichtung 12 forms together with the second Abschotteinrichtung 13, the pollination device 9 and the drying device 11 a suction channel. In this suction channel there is a largely parallel to the catenary flow, which is directed in the opposite direction to the movement of the back empty gripper carriage above the drying device.
Thus, even in the wake of the returning gripper carriage located powder / air mixture is prevented to reach the coating unit or printing unit and, even if it has passed the powder barrier, returned and transported through the suction opening 14 to the outside. Overall, the boom interior is traversed by exhaust flows that reach most of the enclosed volume, effectively removing the powder / air mixture and excess heat present.

Alle aus dem Ausleger geführten Strömungen werden mit Hilfe einer Gesamtabsaugung zusammengefasst und durch einen Puderabscheider geleitet, in dem das Puder aus dem Puder/Luftgemisch entfernt wird.All flows from the boom are combined by means of an exhaust system and passed through a powder separator where the powder is removed from the powder / air mixture.

Um eine bessere Zugänglichkeit für den Bediener zu gewährleisten, kann die erste Abschotteinrichtung teilweise um die Schwenkachse drehbar ausgeführt sein.In order to ensure better accessibility for the operator, the first Abschotteinrichtung may be partially made rotatable about the pivot axis.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Oberes KettenradUpper sprocket 11 Unteres KettenradLower sprocket 22 Leertrumloose side 33 Fördertrumconveying 44 Bogenstapelsheet pile 55 Saugwalzesuction roll 66 Greiferwagengripper carriages 77 PuderdüsenleistePowder nozzle bar 88th Bestäubungseinrichtungdusting device 99 Bogenleitblechsheet guide plate 1010 Trockeneinrichtungdrying device 1111 Erste AbschotteinrichtungFirst Abschotteinrichtung 1212 Zweite AbschotteinrichtungSecond Abschotteinrichtung 1313 Absaugöffnungsuction 1414 Erste AbsaugeinrichtungFirst suction device 15.115.1 Zweite AbsaugeinrichtungSecond suction device 15.215.2 Schwenkachseswivel axis 1616 Druckbogensheet 1717 GlockeBell jar 1818

Claims (11)

  1. Delivery device of a rotary sheet printing machine with a device for sucking away powder and air, wherein chainwheels around which chains with gripper carriages associated therewith circulate are provided in the delivery device, and a dusting device and a drying device are arranged between the conveying run and the idle run of the chains and a sheet guide device is arranged below the conveying run of the chains, and a first and a second screening device, which each extend over the width of the delivery device and run along the path of the gripper carriages, are provided, characterised in that the first screening device (12) has a suction opening (14) connected with suction means and above the idle run (3) and the second screening device (13) is arranged between the conveying run and the idle run (4, 3) of the chains in such a manner that the two screening devices together with the dusting device (9) and the drying device (11) form a suction channel extending along the path of the gripper carriages (7), and the second screening device (13) receives a first suction device (15.1) which extends transversely to the sheet conveying direction and which sucks up air containing powder at the conveying run side and conveys it into the suction channel.
  2. Delivery device according to claim 1, characterised in that the first suction device (15.1) is arranged below the suction opening (14).
  3. Delivery device according to claim 1, characterised in that the second screening device (13) has a cut-out for reception of the dusting device (9).
  4. Delivery device according to claim 3, characterised in that seals are formed between the dusting device (9) and the second screening device (13).
  5. Delivery device according to claim 1, characterised in that cut-outs for reception of a dusting device (9) and/or the drying device (11) are provided in the side walls of the delivery device.
  6. Delivery device according to claim 5, characterised in that the dusting device (9) and/or the drying device (11) is or are constructed to be insertable into the cut-outs of the side walls of the delivery device.
  7. Delivery device according to claim 3, characterised in that the dusting device (9) is formed from a powder nozzle strip (8) and a second suction device (15.2) arranged downstream of the powder nozzle strip (8) in sheet running direction.
  8. Delivery device according to claim 7, characterised in that the powder nozzle strip (8) is partly surrounded by a bell (18).
  9. Delivery device according to claim 7, characterised in that the second suction device (15.2) is arranged closer to the sheet conveying plane than the first suction device (15.1).
  10. Delivery device according to claim 3, characterised in that the dusting device (9) is surrounded by a bell (18) which is open at the side of the conveying run and sealed relative to the second suction device (15.2).
  11. Delivery device according to claim 1, characterised in that the first screening device (12) is constructed to be partly pivotable.
EP20020023704 2001-12-13 2002-10-23 Suction device for removing powder and hot air in a delivery device of a sheet-fed rotary printing machine Expired - Fee Related EP1319507B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10161267 2001-12-13
DE2001161267 DE10161267B4 (en) 2001-12-13 2001-12-13 Device for powder and hot air extraction in the delivery of a sheet-fed rotary printing machine

Publications (3)

Publication Number Publication Date
EP1319507A2 EP1319507A2 (en) 2003-06-18
EP1319507A3 EP1319507A3 (en) 2004-09-29
EP1319507B1 true EP1319507B1 (en) 2010-09-01

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Application Number Title Priority Date Filing Date
EP20020023704 Expired - Fee Related EP1319507B1 (en) 2001-12-13 2002-10-23 Suction device for removing powder and hot air in a delivery device of a sheet-fed rotary printing machine

Country Status (2)

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EP (1) EP1319507B1 (en)
DE (2) DE10161267B4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004058637B3 (en) * 2004-11-26 2005-12-29 Edwin Schneider Powder suction device for printing press has, pressed air input device inside and/or on sheet rest
DE102006055287A1 (en) * 2006-11-23 2008-05-29 Man Roland Druckmaschinen Ag Sheet material guiding method for e.g. sheet rotary printing press, involves driving sheet supporting device that is attached to side of materials, with circumferential speed, which is synchronous to machine speed of sheet conveying system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207118C2 (en) * 1992-03-06 2001-05-10 Hans G Platsch Pollinator
DE19516335C2 (en) * 1995-05-04 1997-07-31 Heidelberger Druckmasch Ag Boom for printed sheets
DE19647259A1 (en) * 1996-11-15 1998-05-20 Weitmann & Konrad Fa Method and device for cleaning means of transport
DE19859246A1 (en) * 1998-01-20 1999-07-22 Koch Hans Peter Sheet offset printing process
DE19901670C5 (en) * 1998-01-20 2016-11-03 Hans-Peter Koch Method and device for keeping clean and / or cleaning a sheet delivery of a sheet-fed offset printing press
WO1999043501A1 (en) * 1998-02-25 1999-09-02 Koch Hans Peter Offset printing method and an offset printing machine
DE19826083B4 (en) * 1998-06-12 2005-03-31 Koenig & Bauer Ag Powder extraction in jibs of sheet-fed rotary printing presses
DE10207865A1 (en) * 2001-03-13 2002-09-19 Heidelberger Druckmasch Ag Extension arm for a rotary printing machine comprises a channels, and a spraying device directed toward the printed materials being transported

Also Published As

Publication number Publication date
DE10161267B4 (en) 2007-08-09
EP1319507A3 (en) 2004-09-29
DE10161267A1 (en) 2003-07-03
EP1319507A2 (en) 2003-06-18
DE50214624D1 (en) 2010-10-14

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