EP2042316A2 - Dispositif de poudre - Google Patents

Dispositif de poudre Download PDF

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Publication number
EP2042316A2
EP2042316A2 EP08105260A EP08105260A EP2042316A2 EP 2042316 A2 EP2042316 A2 EP 2042316A2 EP 08105260 A EP08105260 A EP 08105260A EP 08105260 A EP08105260 A EP 08105260A EP 2042316 A2 EP2042316 A2 EP 2042316A2
Authority
EP
European Patent Office
Prior art keywords
powder
nozzle
nozzle row
nozzles
sheet
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
EP08105260A
Other languages
German (de)
English (en)
Other versions
EP2042316A3 (fr
EP2042316B1 (fr
Inventor
Ulrich Fellenberg
Claudius Haas
Reiner Haas
Peter Dr. Hachmann
Reiner Götz
Bernd Herrmann
Bernhard Kaufmann
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP2042316A2 publication Critical patent/EP2042316A2/fr
Publication of EP2042316A3 publication Critical patent/EP2042316A3/fr
Application granted granted Critical
Publication of EP2042316B1 publication Critical patent/EP2042316B1/fr
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Anticipated expiration legal-status Critical

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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

  • Powder devices have different requirements. They should pollinate the sheets without gaps and do not interfere with the sheet travel.
  • DE-PS 602 762 An apparatus for spraying freshly printed sheets is described, the nozzles of which are arranged offset in two or more rows to one another such that the SprühgutstMail resulting on the sheet overlap each other somewhat at their edges.
  • this device is able to effect a complete pollination of the sheet, but not without affecting the sheet running.
  • the invention is therefore based on the object to provide a powder device which has favorable constructive conditions with respect to a complete pollination of the sheet without affecting the sheet travel.
  • the powder device according to the invention of a printing press comprises a first powder nozzle row with first powder nozzles and a second powder nozzle row with second powder nozzles. At least one of the second powder nozzles is seen in the conveying direction of the sheet at least partially disposed between two adjacent powder nozzles of the first powder nozzle row, wherein between the first powder nozzle and the second row of powder nozzles in the sheet travel direction to be measured nozzle row spacing and wherein the nozzle row spacing at least is half of a between the powder holes of the first powder nozzles and the second powder nozzles and the pressure sheet to be powdered nozzle effective distance is.
  • the at least one of the second powder nozzles either has no overlap with the two adjacent powder nozzles of the first powder nozzle row or with one of these two powder nozzles has only an incomplete overlap.
  • said second powder nozzle can be arranged such that its one half is overlapped by one of the two adjacent first powder nozzles and its other half is overlapped by the gap between the two adjacent first powder nozzles.
  • the first powder nozzle row and the second powder nozzle row are arranged one behind the other in the sheet running direction, so that there is a nozzle row spacing to be measured in the sheet running direction between the first powder nozzle row and the second powder nozzle row.
  • the nozzle row spacing does not have to be the length of a linear range in all cases. If the powder nozzle rows are arranged along the circumferential line of a drum to be powdered or supported, the nozzle row spacing is measured as the length of the imaginary arc bounded by the two powder nozzle rows and concentric with the circumference of the drum.
  • the nozzle row spacing is thus at least half of a nozzle effective distance existing between openings of the powder nozzles of the first powder nozzle row and the second row of powder nozzles and the print sheet to be powdered.
  • the distance between the first Powder nozzle row and the second powder nozzle row is therefore at least half the distance between the respective powder nozzle or its mouth and the sheet to be powdered.
  • the number of rows of nozzles provides a design prerequisite for comparatively large gaps between the powder nozzles of the respective row of powder nozzles.
  • the drag flow entrained by the sheet to be powdered can flow through said gaps without accumulating, so that the risk of flapping movements of the sheet caused by accumulated drag flow is averted.
  • An additional advantage resulting from the number of nozzle rows can be seen in the larger-area distribution of the pneumatic force exerted on the printed sheet by the powdering apparatus. Since the local force peaks are much lower than would be the case with a single row of powder nozzles, a wave formation of the printed sheet caused by the pneumatic force of the powder apparatus is avoided.
  • the powder nozzle offset allows such a distribution of the first powder nozzles of the first powder nozzle row and the second powder nozzles of the second powder nozzle row that the second Powder nozzles powder the traces or strips left by the first powder nozzles on the printed sheet or fill with powder.
  • a further second powder nozzle in the conveying direction of the sheet. Accordingly, two powder nozzles of the second row of powder nozzles are arranged, seen in the sheet running direction, at least partially in register with one and the same nozzle gap of the first row of powder nozzles.
  • the powder device comprises a number n (with n ⁇ 2) of powder nozzle rows, to which belong the first powder nozzle row and the second powder nozzle row.
  • the powder nozzles of the respective powder nozzle row produce when powdering the sheet on the latter powder traces.
  • the powder marks are in the direction of sheet travel stretched powder strips whose track width or strip width of various parameters, such. B. the cone angle of the spray jets of the powder nozzles, depends.
  • the sum of the track widths of the powder traces produced by this powder nozzle row on the sheet to be powdered is (80: n)% to (120: n)% of the format width of the sheet.
  • the sum of the track widths of each of these powder nozzle rows should be applied to each row of powder nozzles powdered print sheets produced 20% to 30% of the format width of the printed sheet. This condition is met, for example, if each powder nozzle row comprises a total of 8 powder nozzles, each producing a 2.5 cm wide powder trace on the printing sheet and the format width of the printing sheet is 100 cm.
  • the sum of the track widths of the powder traces is 20 cm, which corresponds to 20% of the 100 cm format width.
  • the nozzle row spacing is according to a development of at least half and at most twice a powder nozzle within the first powder nozzle and the second powder nozzle row each from powder nozzle to adjacent powder nozzle to be measured.
  • the powder nozzle spacing means the distance which most of the powder nozzles of the respective powder nozzle row have relative to the neighboring nozzle.
  • first powder nozzle row and the second powder nozzle row to their successive activation associated with a control device.
  • the activation mentioned is both a switching on of the air ejection and the powder ejection of the respective powder nozzle row as well as switching on the powder ejection with permanent air ejection of the respective powder nozzle row to understand.
  • the respective powder nozzle row ejects neither air nor powder immediately before activation and ejects a powder-air mixture after activation.
  • the respective powder nozzle series ejects only air prior to activation and is added only as a result of the activation of the ejected air of the powder to form the powder-air mixture.
  • the invention also includes a printing press, which comprises a powder device according to the invention or one of the further developments.
  • Fig. 1 shows a printing machine 7 for printing on sheets, which is a lithographic offset printing machine.
  • the printing machine 7 comprises a sheet delivery 8 with a chain conveyor 9, the gripper bars 10 has.
  • the chain conveyor 9 transports the printed sheets 15 past a powdering device 14, which thereby pollinates the printed sheets 15 with powder.
  • the respective printed sheet 15 is held at its front edge by one of the gripper bars 10 of the chain conveyor 9.
  • Fig. 2 shows that the powder device 14 comprises a first powder nozzle row 1 with first powder nozzles 11, a second powder nozzle row 2 with second powder nozzles 12 and a third powder nozzle row 3 with third powder nozzles 13.
  • the Puderdüsengoln 1, 2, 3 are seen in the sheet running direction 4 with a nozzle row spacing b between the first powder nozzle row 1 and the second powder nozzle row 2 and an equally large nozzle row spacing between the second powder nozzle row 2 and the third powder nozzle row 3 arranged successively.
  • the powder nozzle row 1, 2, 3 extend in the horizontal direction and parallel to each other.
  • Each powder nozzle row 1, 2, 3 comprises a traverse 17, on which the respective powder nozzles 11, 12 and 13 are attached.
  • the first second and third powder nozzles 11, 12, 13 are each designed as spray heads, wherein each spray head can have a plurality of nozzle channels each having an outlet opening.
  • each spray head can have a plurality of nozzle channels each having an outlet opening.
  • first, second and third powder nozzles 11, 12, 13 may be formed as so-called sheath flow nozzles.
  • a sheath-flow nozzle ejects a powder-free sheath flow which encloses the core stream as the sheath or supporting air stream.
  • the core air stream may consist of a plurality of individual streams, each of which is ejected from another of the nozzle channels.
  • the sheath flow may be formed in the manner of an air curtain of several individual streams.
  • the first, second and third powder nozzles 11, 12, 13 are each arranged at a nozzle effective distance a relative to the surface of the printing sheet 15 to be powdered.
  • the nozzle effective distance a is based on the powder ejection orifice of the respective powder nozzle and in the direction perpendicular to the arc surface to measure.
  • the Puderdüsen #2n 1, 2, 3 are equipped with the same even number of powder nozzles - in the example shown there are eight powder nozzles.
  • the printing sheet 15 has a format width B.
  • the first, second and third powder nozzles 11, 12, 13 are each arranged symmetrically distributed relative to the center of this format width B. This is advantageous in terms of a balanced loading of the sheet by the pneumatic forces of the respective powder nozzle row.
  • All the first powder nozzles 11 of the first powder nozzle row 1 are arranged in a specific powder nozzle spacing c relative to their respective adjacent nozzle. Accordingly, said powder nozzle spacing c is also present between the two first powder nozzles 11 closest to the format width center.
  • the second powder nozzles 12 of the second powder nozzle row 2 are in two nozzle groups with the same number of nozzles - in the example shown are the four second powder nozzles 12 - divided. Within each of the two nozzle groups, the second powder nozzles corresponding to the powder nozzle spacing c are arranged uniformly distributed.
  • the nozzle groups are arranged offset away from each other, so that the powder nozzle distance between the two of the format width center closest to the second powder nozzles 12 is greater than the powder nozzle distance c.
  • the third powder nozzles 13 of the third powder nozzle row 3 are in two nozzle groups with the same number of nozzles - in the example shown four third powder nozzles - divided. Within both nozzle groups of the third powder nozzle row, each third powder nozzle 13 has the specific powder nozzle spacing c relative to its neighboring nozzle.
  • the two nozzle groups of the third powder nozzle row 3 are arranged offset from one another in such a way that the third powder nozzles 13 of the third powder nozzle row 3 located closest to the middle of the format width center are present Powder nozzle distance is less than the specific powder nozzle distance c. Due to the nozzle group wise "pulling apart” of the second powder nozzle 2 and the nozzle groups "pushing together" the third powder nozzle 3, the second powder nozzle 2 and the third row of powder nozzles 3 each unevenly large powder nozzle distances, each only between the two of the format width center closest powder nozzles existing Powder nozzle distance differs massively from the constant powder nozzle spacing c of the other powder nozzles of the respective powder nozzle row 2 or 3.
  • the nozzle row spacing b existing between the first powder nozzle row 1 and the second powder nozzle row 2 and between the second powder nozzle row 2 and the third powder nozzle row 3 is at least half the nozzle effective distance a (0.5a ⁇ b).
  • the ratio between the two distances may be selected according to the definition a ⁇ b ⁇ 5a or preferably the definition 1.6a ⁇ b ⁇ 3a.
  • the nozzle row spacing b and the powder nozzle pitch c are preferably dimensioned according to the following definition: 0.5b ⁇ c ⁇ 2b.
  • Each first, second and third powder nozzle 11, 12, 13 produced when powdering the sheet 15 on the latter a powder trace 5 with a certain track width p.
  • Fig. 2 shows that between the powder traces of the third powder nozzles 13 initially powder-free strips are present, which are then covered by the powder traces of the second powder nozzles 12 with powder.
  • the powder marks 5 of the third powder nozzles 13 are not or only in negligible dimensions overlapped by the powder traces of the second powder nozzles 12.
  • the powder traces of the three rows of powder nozzles 1, 2, 3 are joined together substantially "bump on impact". In certain applications, however, an overlap of the powder traces 5 is tolerable.
  • the sheet 15 ruptures during its taking place in the sheet running direction 4 movement from the ambient air, a drag flow 16 with it, which in Fig. 2 symbolically indicated by arrows.
  • the drag flow 16 can flow through the gaps between the beam tufts of the powder nozzles of the respective powder nozzle row unhindered, so that the run of the sheet 15 impairing congestion of the drag flow 16 within the powder device 14 is avoided.
  • the size of the gaps corresponding to the powder nozzle spacing c in turn depends on the number of powder nozzles per row of powder nozzles, this number of powder nozzles advantageously being low due to the comparatively large number of powder nozzle rows 11, 12, 13 of the powder apparatus 14 and due to the transverse offset of the powder nozzles relative to one another from powder nozzle row to powder nozzle row can be held.
  • the powder device 14 is controlled by a control device 6 such that the powder nozzle rows 1, 2, 3 are correlated with the sheet delivery cycle activated and deactivated.
  • each powder nozzle row 1, 2 and 3 is clocked such that it begins during the passage of the printing sheet 15 at its beginning with the powdering and stops at the end of the sheet. Accordingly, the third powder nozzle row 3, the second powder nozzle row 2 and the first powder nozzle row 1 are activated and deactivated in this order mentioned.
  • a delay in relation to the third powder nozzle row 3 activating the second powder nozzle row 2 and with respect to the latter delayed activation of the first powder nozzle row 1 could also be achieved by powder nozzle row to powder nozzle row of different length feed channels 18 for the powder-air mixture.
  • These feed channels 18 may be hose lines.
  • the Lengths of the feed channels 18 may be staggered such that the first powder nozzle row 3 first reached by the print sheet 15 has the shortest feed channel 18 and the last powder nozzle row 1 last reached by the print sheet 15 has the longest feed channel 18.
  • control device 6 activates the powder nozzle rows 1, 2, 3 not only as a function of the presence of the printing sheet 15 to be powdered at a specific location, but also as a function of the respective printing speed and thus sheet transport speed.
  • the switch-off of the powder air can be delayed at low printing speeds and the Zuschaltzeittician the powdered air at higher printing speeds are preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
EP08105260A 2007-09-28 2008-09-08 Dispositif de poudrage Active EP2042316B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007046651A DE102007046651A1 (de) 2007-09-28 2007-09-28 Pudervorrichtung

Publications (3)

Publication Number Publication Date
EP2042316A2 true EP2042316A2 (fr) 2009-04-01
EP2042316A3 EP2042316A3 (fr) 2010-08-11
EP2042316B1 EP2042316B1 (fr) 2011-11-09

Family

ID=40260553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08105260A Active EP2042316B1 (fr) 2007-09-28 2008-09-08 Dispositif de poudrage

Country Status (4)

Country Link
EP (1) EP2042316B1 (fr)
CN (1) CN101396902B (fr)
AT (1) ATE532634T1 (fr)
DE (1) DE102007046651A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019214114A1 (de) 2018-10-29 2020-04-30 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Pudern von Bogen in einer Druckmaschine
EP4059718A1 (fr) * 2021-03-18 2022-09-21 Heidelberger Druckmaschinen AG Commande des zones de poudre dans les machines à imprimer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105269950B (zh) * 2014-06-20 2019-02-15 海德堡印刷机械股份公司 用于印刷机的粉末设备
DE102015014715A1 (de) 2015-11-17 2017-05-18 Eltosch Grafix GmbH Vorrichtung und Verfahren zur Bepuderung von Druckbogen
CN105421245B (zh) * 2015-12-18 2017-08-25 江苏兆通工程技术有限公司 盖梁无支架钢抱箍法施工工艺
DE102018220528A1 (de) * 2018-01-25 2019-07-25 Heidelberger Druckmaschinen Ag Verfahren zum Betrieb einer Druckmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602762C (de) 1932-10-08 1934-09-15 Otto Heinrich Vorrichtung zum Bespruehen frisch bedruckter Bogen mit fluessigem Paraffin, Wachs o.dgl.
DE19733691A1 (de) 1996-12-10 1998-06-18 Heidelberger Druckmasch Ag Bogen verarbeitende Rotationsdruckmaschine
DE10038774A1 (de) 2000-06-09 2001-12-13 Heidelberger Druckmasch Ag Vorrichtung zur Erzeugung eines Luftstromes in einer Vervielfältigungsmaschine
US20060107857A1 (en) 2004-11-19 2006-05-25 Weitmann & Konrad Gmbh & Co. Kg Spray nozzle and method for dusting freshly printed products

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8814129U1 (de) * 1988-11-11 1990-03-15 Platsch, Hans G., Dipl.-Ing., 7000 Stuttgart Gerät zum Bestäuben von Druckerzeugnissen
DE19643747A1 (de) * 1996-10-23 1998-04-30 Heidelberger Druckmasch Ag Einrichtung zur Applikation eines Trennmediums auf flächige Produkte
EP0847856A3 (fr) * 1996-12-10 1998-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour saupoudrer des feuilles
JP3949993B2 (ja) * 2002-04-02 2007-07-25 株式会社小森コーポレーション 印刷機のパウダー装置
DE102005039078B3 (de) * 2005-08-05 2007-03-08 Weitmann & Konrad Gmbh & Co Kg Vorrichtung und Verfahren zum Bestäuben von bedruckten Bogen oder einer Endlosbahn mit Puder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602762C (de) 1932-10-08 1934-09-15 Otto Heinrich Vorrichtung zum Bespruehen frisch bedruckter Bogen mit fluessigem Paraffin, Wachs o.dgl.
DE19733691A1 (de) 1996-12-10 1998-06-18 Heidelberger Druckmasch Ag Bogen verarbeitende Rotationsdruckmaschine
DE19751972A1 (de) 1996-12-10 1998-06-18 Heidelberger Druckmasch Ag Vorrichtung zur Bestäubung von Bogen
DE10038774A1 (de) 2000-06-09 2001-12-13 Heidelberger Druckmasch Ag Vorrichtung zur Erzeugung eines Luftstromes in einer Vervielfältigungsmaschine
US20060107857A1 (en) 2004-11-19 2006-05-25 Weitmann & Konrad Gmbh & Co. Kg Spray nozzle and method for dusting freshly printed products
DE102004057478A1 (de) 2004-11-19 2006-06-01 Weitmann & Konrad Gmbh & Co. Kg Sprühdose und Verfahren zum Bestäuben von druckfrischen Druckprodukten

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019214114A1 (de) 2018-10-29 2020-04-30 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Pudern von Bogen in einer Druckmaschine
CN111098591A (zh) * 2018-10-29 2020-05-05 海德堡印刷机械股份公司 用于对印刷机中的页张进行施粉的方法和设备
EP4059718A1 (fr) * 2021-03-18 2022-09-21 Heidelberger Druckmaschinen AG Commande des zones de poudre dans les machines à imprimer

Also Published As

Publication number Publication date
ATE532634T1 (de) 2011-11-15
DE102007046651A1 (de) 2009-04-02
EP2042316A3 (fr) 2010-08-11
CN101396902B (zh) 2012-08-08
CN101396902A (zh) 2009-04-01
EP2042316B1 (fr) 2011-11-09

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