EP2578406A2 - Dispositif dýapplication de poudre sur des feuilles d'impression - Google Patents

Dispositif dýapplication de poudre sur des feuilles d'impression Download PDF

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Publication number
EP2578406A2
EP2578406A2 EP12183967.4A EP12183967A EP2578406A2 EP 2578406 A2 EP2578406 A2 EP 2578406A2 EP 12183967 A EP12183967 A EP 12183967A EP 2578406 A2 EP2578406 A2 EP 2578406A2
Authority
EP
European Patent Office
Prior art keywords
powder
air mixture
nozzle
inlet
housing
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.)
Withdrawn
Application number
EP12183967.4A
Other languages
German (de)
English (en)
Other versions
EP2578406A3 (fr
Inventor
Thomas Gärtner
Reiner Götz
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.)
Weitmann and Konrad GmbH and Co KG
Original Assignee
Weitmann and Konrad GmbH and Co KG
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 Weitmann and Konrad GmbH and Co KG filed Critical Weitmann and Konrad GmbH and Co KG
Publication of EP2578406A2 publication Critical patent/EP2578406A2/fr
Publication of EP2578406A3 publication Critical patent/EP2578406A3/fr
Withdrawn legal-status Critical Current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 device for applying powder on printed sheets, with a housing and an inlet for a powder-air mixture and the powder-air mixture over the sheets bending nozzle.
  • Such devices are also referred to as pollinators and they have the task that the powder is sprayed only on the sheets and not in the gaps between successive sheets. Therefore, such devices have been developed with a corresponding Pudertaktung must work accurately even at high printing speeds.
  • the DE 199 01 245 A1 proposes to operate the producer of the powder-air mixture without interruption.
  • the timing is no longer effected by means of the powder-air mixture generator, but by means of an element located close to the arc.
  • This element closes cyclically an outlet opening of a housing in which a powder nozzle is arranged.
  • the closure member releases the outlet opening, the powder-air mixture exits the housing through the outlet opening.
  • the closure element closes the outlet opening, the powder from the powder nozzle bounces off the closure element. The bounced powder is sucked out of the housing by means of a suction device.
  • no powder is discharged. But it requires a suction device to suck the excess powder.
  • the DE 197 07 157 A1 shows a further pollination device, in which also no powder is discharged when the housing is closed by the closure element. This device is also provided with a suction chamber for the excess powder.
  • the US 3,527,412 A shows a powder spray device with an inlet and two outlets. In between, a distribution valve is connected, with which the powder-air mixture is divided equally between the two outlets 42 and 44.
  • the object of the invention is to provide a pollination device which has a simple structure and with which signatures can be pollinated more accurately.
  • the reversing valve of the device according to the invention is therefore located in front of the powder-air mixture discharging nozzle, so that no time delay for the control of the powder-air mixture must be included. In addition, no interactions of individual powder charges in the feeder hose are to be feared.
  • the switching valve is controlled so that the inlet is then connected to the nozzle when a sheet is present. The continuously supplied powder-air mixture is then discharged. Switches the changeover valve, then the continuously supplied powder-air mixture is supplied to the other outlet. Machine pollution is greatly reduced in this way.
  • the main advantage is that the powder-air mixture flows continuously and therefore there are no pressure surges. The switching times are variable, so that an optimal system adaptation is possible.
  • the switching valve is designed as a linear or rotatable element.
  • the switching valve may be designed, for example, as a slide or as a circular cylindrical disk which has a passage arranged transversely to the axis.
  • the axis is formed by the displacement axis and, in the case of the circular cylinder disk, by the axis of rotation.
  • Such embodiments are relatively simple and have the advantage that they consist of a single component, so that the susceptibility to failure is negligible.
  • the powder-air mixture is not contaminated by the internally mounted in the device switching valve, since the powder is returned before it leaves the nozzle.
  • the one orifice opening in particular as a passage, communicates with the inlet and the other orifice of the passage communicates with the nozzle or the additional outlet.
  • the powder-air mixture is passed directly from the inlet to the nozzle or to the other outlet without detours.
  • the disc is rotatable about its axis, in particular oscillatable, stored in the housing.
  • switching frequencies can be realized that are far above today's limits.
  • the pollination system can also be used in high-speed printing presses.
  • the small switching paths or angles are energetically favorable, which is why small drives suffice.
  • a collecting container for the powder-air mixture is connected downstream of the further outlet. There is also the possibility that this powder-air mixture is returned to the reservoir.
  • the switching valve on two end positions, wherein the switching valve is urged by spring force in one of the end positions. In this way, it only needs a drive that has to overcome the spring force.
  • the housing has a feed opening into the nozzle for the powder-free supporting air.
  • This support air is passed from the housing into the nozzle and can leave the nozzle in a known manner as one or more jets.
  • the Figures 1 and 2 show a first embodiment of the erfindunuxen device 10, with which signatures 12 are dusted with a powder-air mixture 14 in longitudinal section and in a perspective view.
  • the device 10 has a housing 16 with an inlet 18 and a connection 20 for a nozzle 22.
  • a further outlet 24 can be seen, which opens into an external collecting container 26.
  • a switching valve 28 Between the inlet 18 and the port 20 and the further outlet 24 is a switching valve 28, which has a passage 30 in the form of a bore 32.
  • the passage 30 widens (for example, with an opening angle of 40 °) so as not to cover the passage 30 even if the change-over valve 28 is turned by +/- 20 °.
  • the switching valve 28 is designed as a circular cylindrical disk 34 with an axis 36.
  • the axis 36 is formed as a rotation axis 38 and passes through the housing 16 (advantageously on both sides), so that a drive 40 can be connected directly or via a belt 42.
  • the drive 40 is driven to oscillate, whereby the circular cylindrical disk 34 is rotated by +/- 20 °.
  • the passage 30 connects the inlet 18 either (via the connection 20) to the nozzle 22 or to the further outlet 24.
  • the drive 40 is controlled in such a way that the nozzle 22 then moves the powder-air mixture 14 in the direction 44 transported printed sheet 12 applies, if this is below the nozzle 22.
  • the powder-air mixture 14 Located below the nozzle 22 of lying between two sheets 12 gap 46, the powder-air mixture 14 is the further outlet 24 and thus the collecting container 26, for which circular cylindrical disk 34 is rotated by 40 ° by the drive 40, so that the inlet 18 is connected to the further outlet 24.
  • the device is continuously flowed through by the powder-air mixture 14.
  • FIG. 2 also shows a second inlet 48 into the housing 16, via which the nozzle 22 is supplied with supporting air. It is ensured via this supporting air that the powder-air mixture 14 leaving the nozzle 22 impinges exactly on the printed sheet 12.
  • FIG. 3 shows a second embodiment of the device 10 according to the invention, in which the switching valve 28 is designed as a slide 50, whose axis 36 as a plunger 52, the housing 16 passes through at this plunger 52 also engages a (not shown) drive and moves the slider 50th in the direction of the double arrow 54, whereby the passage 30 the inlet 18th either connects (via port 20) to the nozzle 22 or to the further outlet 24.
  • a drive for example, a magnetic drive can be used, which displaces the slider 30 in the direction of return springs 56.
  • the plunger 52 may also be arranged on the side of the slider 50 on which in the FIG. 3 the return springs 56 are located and these would then be on the opposite side. Then the inlet 18 would be connected to the further outlet 24 in the rest position of the drive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Multiple-Way Valves (AREA)
  • Coating Apparatus (AREA)
  • Printing Methods (AREA)
EP12183967.4A 2011-10-05 2012-09-12 Dispositif d'application de poudre sur des feuilles d'impression Withdrawn EP2578406A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110084026 DE102011084026B4 (de) 2011-10-05 2011-10-05 Vorrichtung zum Aufbringen von Puder auf Druckbögen

Publications (2)

Publication Number Publication Date
EP2578406A2 true EP2578406A2 (fr) 2013-04-10
EP2578406A3 EP2578406A3 (fr) 2015-02-25

Family

ID=46967982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12183967.4A Withdrawn EP2578406A3 (fr) 2011-10-05 2012-09-12 Dispositif d'application de poudre sur des feuilles d'impression

Country Status (2)

Country Link
EP (1) EP2578406A3 (fr)
DE (1) DE102011084026B4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115674896A (zh) 2021-07-29 2023-02-03 海德堡印刷机械股份公司 撒粉末装置
DE102023131357A1 (de) * 2023-11-10 2025-05-15 Gema Switzerland Gmbh Pulverversorgungsvorrichtung für eine pulverbeschichtungsanlage und verfahren zum fördern von beschichtungspulver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE442790C (de) 1924-08-22 1927-04-08 August Assfalg Briefkasten mit elektrischer Einwurfmeldung
DE1252703B (de) 1963-07-13 1967-10-26 Weitmann & Konrad Vorrichtung zum Bestaeuben bewegter Druckbogen
US3527412A (en) 1967-09-05 1970-09-08 Binks Mfg Co Disperser for powdered spray system
DE19901245A1 (de) 1998-02-17 1999-08-19 Heidelberger Druckmasch Ag Vorrichtung zum Pudern bedruckter Bogen

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB529255A (en) * 1938-08-09 1940-11-18 Herbert Cole Improvement in dry spray for preventing offset
GB726793A (en) * 1951-07-12 1955-03-23 Karl Otte Improvements in or relating to pressure sprayers in printing machines to prevent theset off of fresh printed sheets when leaving the machine
US2901179A (en) * 1954-11-02 1959-08-25 Schnellpressenfab Heidelberg Printing press
DE1037470B (de) * 1954-11-02 1958-08-28 Schnellressenfab Heidelberg Druckmaschine mit Einrichtung zum Verhueten des Abschmierens der bedruckten Papierbogen oder -bahnen
CH361583A (de) * 1958-09-10 1962-04-30 Rutishauser Edgar Druckluftanlage an Rotations-Trommel-Vervielfältigern
DE2527903C3 (de) 1975-06-23 1980-06-12 Anibal Armando Prof. Dr. Brasilia Inocencio Elektrochemisches Element
CS204450B1 (en) * 1978-12-27 1981-04-30 Vaclav Kaspar Dusting device
JPH04345848A (ja) * 1991-05-23 1992-12-01 Dainippon Printing Co Ltd オフセット印刷におけるオゾン排気方法および排気装置
DE4427904A1 (de) * 1994-08-06 1996-02-08 Hans Platsch Puderbestäubungsgerät
DE19707157B4 (de) * 1997-02-22 2006-04-06 Weitmann & Konrad Gmbh & Co Kg Vorrichtung zum Bestäuben von bewegten flächigen Produkten
DE10361602A1 (de) * 2003-12-24 2005-07-21 Platsch Gmbh & Co.Kg Pudergasgenerator
DE102005050199A1 (de) * 2005-10-18 2007-04-19 Platsch Gmbh & Co.Kg Vorrichtung zum Bestäuben von Produkten, insbesondere Druckprodukten
CN102189753B (zh) * 2010-03-15 2015-03-18 海德堡印刷机械股份公司 用于对印刷页张撒布粉末的设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE442790C (de) 1924-08-22 1927-04-08 August Assfalg Briefkasten mit elektrischer Einwurfmeldung
DE1252703B (de) 1963-07-13 1967-10-26 Weitmann & Konrad Vorrichtung zum Bestaeuben bewegter Druckbogen
US3527412A (en) 1967-09-05 1970-09-08 Binks Mfg Co Disperser for powdered spray system
DE19901245A1 (de) 1998-02-17 1999-08-19 Heidelberger Druckmasch Ag Vorrichtung zum Pudern bedruckter Bogen

Also Published As

Publication number Publication date
EP2578406A3 (fr) 2015-02-25
DE102011084026A1 (de) 2013-04-11
DE102011084026B4 (de) 2015-04-02

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