EP0947321B1 - Bestäubungseinrichtung in einer Druckmaschine - Google Patents

Bestäubungseinrichtung in einer Druckmaschine Download PDF

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Publication number
EP0947321B1
EP0947321B1 EP99104850A EP99104850A EP0947321B1 EP 0947321 B1 EP0947321 B1 EP 0947321B1 EP 99104850 A EP99104850 A EP 99104850A EP 99104850 A EP99104850 A EP 99104850A EP 0947321 B1 EP0947321 B1 EP 0947321B1
Authority
EP
European Patent Office
Prior art keywords
suction
sheet
openings
sheet guiding
powdering device
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
EP99104850A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0947321A1 (de
Inventor
Bernd Lomp
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 EP0947321A1 publication Critical patent/EP0947321A1/de
Application granted granted Critical
Publication of EP0947321B1 publication Critical patent/EP0947321B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/06—Powdering devices, e.g. for preventing set-off

Definitions

  • the invention relates to a dusting device in a printing press, preferably in a sheetfed press, with a pollination device after the preamble of the main claim.
  • a pollination device of this type for powder pollination of freshly printed sheets is known from DE 22 07 983 B2.
  • the device is intended to prevent dust from being dusted beyond the limits of the effective range and to enable powder recovery.
  • a powder feed tube is arranged above the sheet conveying plane, from which powder is sprayed onto the sheet by means of compressed air.
  • a blow pipe with an associated suction pipe is arranged as a blow curtain, through which excess powder can be sucked off.
  • DE 42 07 118 A1 it is known from DE 42 07 118 A1, among other things, that a powder box has a greater distance in the conveying direction after the powder nozzle arrangement than before it.
  • a sheet guiding device which, facing the sheet conveying plane, essentially has a perforated plate with three openings and is functionally connected to a vacuum line.
  • Another dusting device is a powder device known in the boom of a printing press.
  • This powder device has a blower, preferably an axial fan, which is perpendicular to the Sheet conveying airflow generated.
  • a sheet guiding device is arranged in the delivery, which supports the sheet guidance.
  • a disadvantage of these designs is that the uncontrolled escape of pollination material into the printing press, for example in the sheet delivery, is not sufficiently prevented. This leads to machine soiling, which is exacerbated in particular by excessive dosing of pollination material.
  • the use of blow and suction pipes as an air curtain creates additional turbulence, which, in connection with the passing gripper systems, is further intensified during the pollination process.
  • the quality achievable in the pollination process deteriorates due to increasing turbulence.
  • the sheet-shaped printing materials fixed in the gripper closure are insufficiently dusted in the area of the leading edge, which leads to the printing of the printing materials on the leading edge in the delivery stack.
  • the turbulence causes "vagabond" powder particles within the printing press, which on the one hand reduce the efficiency of the dusting device and at the same time increase the machine contamination.
  • EP 0 156 173 B1 describes a device for guiding on one and both sides printed sheet known.
  • the device consists of a modular arrangement Flow channels that form a common guide surface. On the flow channels are assigned fans on the bottom, which are in suction or Blown air operation can be operated.
  • the guide surface has a large number of openings which are effective as suction nozzles or blowing / suction nozzles.
  • DE-A-2 116 042 describes a method and a device for removal known from powder from the atmosphere.
  • the powder applicator and manifold are on the same side of the Assigned to the substrate.
  • the manifold is in the direction of the manifold Substrate open.
  • the object of the invention is a pollination device of the aforementioned To create a type that avoids the disadvantages mentioned, the one achieved more uniform pollination of the printing materials and the proportion of vagabond pollination material noticeably reduced.
  • the advantage of the invention is that the pollution of the Printing machine through turbulent (vagabond) pollinating material, such as especially powder, is noticeably reduced.
  • turbulent (vagabond) pollinating material such as especially powder
  • the pollination facility extends over the maximum format width of the sheet-shaped printing material.
  • the pollination device preferably consists of at least one Series of nozzles for the discharge of the pollination material as well as for compressed air. In a further training, each nozzle can be used for the discharge of pollination material another nozzle for the discharge of compressed air is assigned adjacent his.
  • the dusting material or the printing material can be charged by electrostatic forces.
  • a pneumatically actuated guide device forming the sheet guide surface is arranged below the conveying plane of the sheet-shaped printing material.
  • a suction system is integrated within the sheet guiding surface. This suction system is preferably arranged adjacent to the dusting device.
  • the suction system can be implemented in particular in two configurations and in the first embodiment the suction system is a single module which can be inserted between the modularly arranged guide device. In this case, the suction system is preferably arranged abutting the adjacent guide unit, and a multiple arrangement of the suction systems can also be carried out.
  • the suction system forms, with the guide devices, an aligned sheet guide surface with openings.
  • the suction system is a segment that can be used as a component section in a modular guide device.
  • the guide device has a recess for a suitable use of the suction system.
  • the dusting device is preferably in constant operation in the respective printing operation.
  • the suction system is constantly in operation, similar to the activated pollination device.
  • the suction system sucks the "vagabonding" particles of the pollination material through the openings in the sheet guide surface and disposes of them through at least one suction channel, which is preferably arranged on the side.
  • the suction of the dusting material in the sheet guiding device reduces, for example, drag flows of the gripper systems and turbulence that are generated by the printing material itself and / or the associated sheet guiding devices.
  • the suction system can be activated with its openings (suction openings) in the sheet guiding surface.
  • a delivery 1 is arranged downstream of a multicolor offset printing press.
  • a blowing device 6 is arranged above it in a field.
  • the boom 1 also has sheet guiding devices formed from modular arranged guide devices 8,10, for the sheet guidance.
  • a pollination device 17 is arranged in the arch rise of the boom 1.
  • the Pollination device 17 extends over the maximum format width of the processing substrate and has at least one across the substrate width extending, format-dependent activatable row of nozzles.
  • the Nozzles are preferably designed as bores and / or slots.
  • the application with the pollination material is done using compressed air and preferably Powder as a mixture.
  • a further opening for example as a nozzle for the discharge of powder, can be associated with each nozzle for the discharge of compressed air.
  • Pollination material and compressed air form a volume flow that strikes the top of the substrate.
  • the nozzles for the discharge of compressed air in combination with powder or as a powder / compressed air mixture are inclined in relation to a conveying plane for the printing material 2, preferably at an acute angle in the conveying direction 9 and form a volume flow in the inclined flow direction in the “dusting” operating mode on the substrate.
  • the pollination device 17 is coupled to a device for the supply of dusting material (powder) and to a compressed air supply. Due to the inclined volume flow, the area of the leading edge of the printing material directly behind a passing gripper system 3 is better dusted, since this area can be specifically pollinated due to the inclined flow direction.
  • a guide device below the sheet conveying plane, formed from a plurality of guide units 8 and one depending on the format positionally displaceable guide unit 10.
  • the leadership units 8, 10 are coupled to a pneumatic system 11 and point to the sheet conveying plane Openings 13, which are arranged within a sheet guiding surface 12 are.
  • each guide unit 8 has in the sheet guide surface 12 openings 13 and is designed as a flow channel.
  • the pneumatic system 11 is switchable Fan designed, which, coupled to the flow channel, the openings 13 flow with blown air / suction air.
  • a suction system 19 can be used as a segment within the sheet guide surface 12, especially in a guide unit 8.
  • the guide unit 8 has a corresponding recess in which the suction system 19 can be inserted in a suitable manner.
  • the suction system 19 has a sheet guide surface 16 which is arranged in alignment with the sheet guide surface 12 of the guide units 8.
  • a plurality of openings 15 are arranged in the sheet guiding surface 16.
  • the openings 15 are in communication with suction channels 14, which are coupled to a suction air source.
  • the suction channels 14 are preferably led out of the printing machine in a lateral direction.
  • Each suction channel 14 is preferably coupled to a device for disposing of the excess dusting material.
  • each suction channel 14 can also be coupled to the pollination device 17 with a circulation system for the processed return of the pollination material.
  • the hole pattern of the openings 15 extends at least in total over the maximum format width.
  • FIG. 2 shows an embodiment consisting of three suction channels 14 arranged in parallel.
  • Each suction channel 14 is functionally connected to the openings 15 arranged in the sheet guiding surface 16.
  • the hole pattern of these openings 15 is arranged in the conveying direction 9 of the printing substrate 2 in the area of the first suction channel 14 in the respective side area. Each side area extends at least over the difference area from the minimum and maximum format width of the printing material 2.
  • the second suction channel 14 following in the conveying direction 9 has a hole pattern of the openings 15 arranged symmetrically in the central area and corresponds at least to the minimum format width of the printing material 2.
  • the in the conveying direction 9 downstream third suction channel 14 again shows a hole pattern of the openings 15 analogous to the first suction channel 14.
  • the openings 15 are covered by the openings 15 in total.
  • other geometric hole patterns can also be realized.
  • the suction system 19 with the openings 15 and suction channels 14 also extends beyond the maximum format width, preferably approximately up to the inner walls of the side frames.
  • the suction capacity of the suction system 19 can be increased, blowing air is additionally supplied by at least one suction duct 14 becomes.
  • the blown air flows continuously or clocked within the suction channel 14, while this is activated for suction, along the openings 15 and, as an injection, accelerates the air to be extracted (on the openings 15 and in the suction channel 14).
  • the blown air supply is preferred integrated in the center of the suction channel 14 when suction is carried out on both sides. Is for example, with smaller format widths, suction on one side on a suction channel 14 arranged laterally, so the blowing air supply is on the opposite Side of the suction channel 14 can be arranged.
  • the suction system 19 can be removed as a segment from the guide unit 8 and e.g. against a suction system 19 with different hole pattern of the openings 15 interchangeable.
  • An alternative is if the pollination device 17 is not required the space created by removing the suction system 19 with an insertable segment of a sheet guiding surface 12 (with openings 13) can be closed again, so that the guide unit 8 again exclusively as Flow channel in the blown air / suction air mode is operable.
  • the suction system 19 is preferably arranged adjacent to the pollination device 17. It was found, among other things, that in the delivery direction 9 of the pollinator 17 a short distance offset the suction system 19 is and a particularly high efficiency can be achieved.
  • the guide units 8 are designed to be interchangeable, so it is small Effort possible, e.g. under the aspect of the substrate to be processed, the guide units 8 themselves or at least their sheet guiding surface 12 with openings 13 against a sheet guide surface 12 with different To exchange the hole pattern of the openings 13.
  • the mode of action is as follows.
  • the circulating conveyor system 4 transports by means of gripper systems 3 sheet-shaped printing materials 2 in the conveying direction 9 a boom stack 5 to.
  • the gripper system 3 In the upper area of the arch rise the gripper system 3 with the printing material 2 the pollination device 17.
  • Die Pollination device 17 is activated and pollinates continuously in the conveying direction 9 the printing material 2 hurrying past in the direction of flow at an acute angle, related to the funding level.
  • the volume flow is achieved by the inclination of the
  • the dusting device 17 also nozzles the one otherwise through the gripper system 3 hidden area of the front edge of the substrate 2.
  • the nozzles of the pollination device 17, which extend over the format, can be switched individually or in groups.
  • the pollination device 17 and the sheet guiding device 8, 10 including the suction system 13 are constantly activated. If the printing material 2 is moved past the dusting device 17, the suction system 19 sucks off excess stunning material, particularly in the lateral area. In the free spaces between the trailing edge of the substrate (of the leading gripper system 3) and the trailing gripper system 3, the suction system 19 sucks off the excess dusting material via all openings 15 (also those arranged in the middle area). Blowing air additionally introduced into the suction channels 14 achieves a flow acceleration of the air to be extracted, which is contaminated with dusting material.
EP99104850A 1998-03-24 1999-03-11 Bestäubungseinrichtung in einer Druckmaschine Expired - Lifetime EP0947321B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19812711A DE19812711C2 (de) 1998-03-24 1998-03-24 Bestäubungseinrichtung in einer Druckmaschine
DE19812711 1998-03-24

Publications (2)

Publication Number Publication Date
EP0947321A1 EP0947321A1 (de) 1999-10-06
EP0947321B1 true EP0947321B1 (de) 2001-11-07

Family

ID=7861985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104850A Expired - Lifetime EP0947321B1 (de) 1998-03-24 1999-03-11 Bestäubungseinrichtung in einer Druckmaschine

Country Status (4)

Country Link
EP (1) EP0947321B1 (ja)
JP (1) JP3320672B2 (ja)
AT (1) ATE208269T1 (ja)
DE (2) DE19812711C2 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10118757B4 (de) 2000-05-17 2008-05-08 Heidelberger Druckmaschinen Ag Druckmaschine
DE102005014257A1 (de) * 2005-03-30 2006-10-05 Koenig & Bauer Ag Leiteinrichtung zum Fördern von flächigen Bedruckstoffen auf einem Luftpolster
DE102007020621A1 (de) * 2007-04-30 2008-11-13 Edwin Schneider Puderabsaugeinrichtung an Druckmaschinen
CN102649346B (zh) * 2011-02-28 2017-08-29 海德堡印刷机械股份公司 从下面给经印刷和/或涂有亮油的页张撒粉或扑粉的设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207983A1 (de) * 1972-02-21 1972-08-30 Platsch Zerstaeubung Albin Vorrichtung zur puderbestaeubung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167012A (en) * 1961-12-01 1965-01-26 Miehle Goss Dexter Inc Sheet control and spray collection chamber
US3680528A (en) * 1970-04-01 1972-08-01 Oxy Dry Sprayer Corp Apparatus for powder removal
DE3135220A1 (de) * 1981-09-05 1983-03-17 Weitmann & Konrad GmbH & Co KG, 7022 Leinfelden-Echterdingen Vorrichtung zum aufbringen von puderteilchen
DE3411029A1 (de) * 1984-03-24 1985-10-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum fuehren von ein- und beidseitig bedruckten bogen
DE4207118C2 (de) * 1992-03-06 2001-05-10 Hans G Platsch Bestäubungsgerät
DE29501537U1 (de) * 1995-02-01 1995-03-09 Heidelberger Druckmasch Ag Bogenleiteinrichtung mit Luftversorgungskästen
DE19539757C1 (de) * 1995-10-26 1997-05-22 Roland Man Druckmasch Ausleger für eine Bogenrotationsdruckmaschine
DE29517283U1 (de) * 1995-11-02 1995-12-14 Heidelberger Druckmasch Ag Puderdusche
DE19733691C2 (de) * 1996-12-10 2001-02-08 Heidelberger Druckmasch Ag Bogen verarbeitende Rotationsdruckmaschine
EP0847856A3 (de) * 1996-12-10 1998-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Vorrichtung zur Bestäubung von Bogen
DE29721185U1 (de) * 1997-11-29 1998-01-15 Roland Man Druckmasch Bogenführungseinrichtung in einer Druckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2207983A1 (de) * 1972-02-21 1972-08-30 Platsch Zerstaeubung Albin Vorrichtung zur puderbestaeubung

Also Published As

Publication number Publication date
ATE208269T1 (de) 2001-11-15
DE19812711C2 (de) 2000-04-27
EP0947321A1 (de) 1999-10-06
DE59900392D1 (de) 2001-12-13
JP3320672B2 (ja) 2002-09-03
DE19812711A1 (de) 1999-09-30
JPH11314350A (ja) 1999-11-16

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