EP1162067A1 - Procédé et dispositif pour enlever une feuille imprimée d'un cylindre - Google Patents

Procédé et dispositif pour enlever une feuille imprimée d'un cylindre Download PDF

Info

Publication number
EP1162067A1
EP1162067A1 EP01112212A EP01112212A EP1162067A1 EP 1162067 A1 EP1162067 A1 EP 1162067A1 EP 01112212 A EP01112212 A EP 01112212A EP 01112212 A EP01112212 A EP 01112212A EP 1162067 A1 EP1162067 A1 EP 1162067A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
waves
printing material
source
printing
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
EP01112212A
Other languages
German (de)
English (en)
Other versions
EP1162067B1 (fr
Inventor
Eckart Dr. Frankenberger
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
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1162067A1 publication Critical patent/EP1162067A1/fr
Application granted granted Critical
Publication of EP1162067B1 publication Critical patent/EP1162067B1/fr
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
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/001—Ink mist preventing means

Definitions

  • the invention relates to a method and an apparatus for detaching a Printing material from a cylinder in a machine processing the printing material.
  • Such a device is described in DD-PS 104 753, in which in one gusset-shaped space between a blanket cylinder and a Printing material sheet Compressed air is blown in at approx. 2 atm to a so-called To keep the tear-off angle of the substrate sheet constant.
  • the invention is therefore based on the object of a method and a device to remove a substrate from a cylinder, where none Noise pollution occurs and energy consumption is low.
  • the method according to the invention for detaching a printing material from a cylinder in A machine that processes the printing material is characterized by the fact that waves in directed a gusset-shaped space between the substrate and the cylinder become.
  • the waves are Ultrasonic waves. Because the frequency of the ultrasonic waves above 20 kHz and therefore outside of the human hearing range, noise pollution is advantageous locked out.
  • central rays intersect the waves or ultrasound waves emitted from different directions in one im Area of the tear line.
  • the pasty liquid by the action of the ultrasonic waves on the Fluid advantageous further development is the frequency of Ultrasonic waves above 30 kHz and preferably above 40 kHz. If it is the Liquid is a common offset printing ink, a frequency of approximately 50 kHz preferred.
  • electromagnetic waves such as. B. light or Microwaves in the gore-shaped space between the substrate and the Cylinders are aimed.
  • the printing ink can be heated locally in the region of the tear line.
  • the device according to the invention for detaching a printing material from a cylinder in a machine that processes the printing material is characterized in that at least one wave source on a gusset-shaped space between the Substrate and the cylinder is aligned.
  • This device suitable for carrying out the method according to the invention used in comparison with a blow molding used for detachment (DD-PS 104 753) or the like advantageously little energy to excite the at least one Wave source.
  • the at least one wave source is preferably at least one ultrasound source educated.
  • the ultrasound source (s) is (are) designed as a piezo element (s).
  • the at least one ultrasound source can thus be relatively deep in the gore-shaped space and installed in the machine close to the demolition line.
  • the wave or ultrasound source (s) are sealed arranged next to a pressure gap, which the cylinder together with a Impression cylinder forms.
  • the machine processing the printing material as one Coating machine and the cylinder conceivable as an application cylinder.
  • the cylinder can function as the application cylinder in the Coating machine for applying an adhesive or glue layer on the Printing material may be provided.
  • focusing of the ultrasonic waves is also possible using a so-called ultrasound lens possible, which as one with an ultrasound corresponding frequency oscillating, cup-shaped around a focus curved part is formed and all ultrasonic waves on the in the area of Throwing fluid threads into focus.
  • the ultrasound sources are upwards and / or downwards relative to one another inclined below that the central rays emitted by the ultrasound sources Hit ultrasound waves in the focus.
  • the wave source (s) can also be used as light or heat radiators, e.g. B. as Halogen tube.
  • the machine that processes the printing material is preferably an indirect one Printing process printing press with a printing form cylinder and a Backing cylinder guiding the substrate.
  • FIG. 1 a machine 2 processing an arc-shaped printing material 1 is shown in FIG Cutout shown.
  • the section shows an offset printing unit as one Rotary printing machine trained machine 2 that from a printing form cylinder 3, a blanket cylinder 4 and an impression cylinder 5 with at least one Gripper system 6 for holding the printing material 1.
  • the blanket cylinder 4 has good QR (quick release) properties showing blanket, but it can usually not be completely avoided be that the printing material 1 after passing through a printing nip 7 with its in the offset printing unit printed sheet adheres to the blanket cylinder 4 and thereby being lifted off the impression cylinder 5.
  • the size of one between the Printing gap 7 and a tear line 8 of the printing material 1 lying tear angle ⁇ of the stickiness (tack value) of that printed by means of the blanket cylinder 4 Printing ink, the paper quality of the printing material 1 and with the Machine speed corresponding peripheral surface speed of the Blanket cylinder 4 dependent.
  • tear threads 9 - compare Figure 2 -, which deliberately cuts by means of several piezoelectric ultrasound sources become.
  • Ultrasonic waves 13, 14 and 15 of the ultrasonic sources 10, 11 and 12 are on the Tear-off threads 9 are focused so that by the action of the tear-off threads 9 impinging ultrasonic waves 13, 14 and 15 the stickiness of the printing ink locally in the Tear-off threads 9 is reduced by 90% or more and the tear-off threads 9 are thereby lighter tear through.
  • Each of the ultrasound sources 10, 11 and 12 is together with them in FIG. 1 concealed further ultrasound sources in a gusset-shaped space 16 between the Printing material 1 and the blanket cylinder 4 in one to this and to the tear line 8 axially parallel and extending across the entire width of the printing material 1 Row arranged.
  • the invention is based on the knowledge that in an unstable system of complex networked influences, e.g. the properties of the blanket and the Substrate 1 and the machine speed, with which system lowest Changes in influencing factors, e.g. the machine speed, the result can change greatly, a strong, defined, additional influence can be introduced which overlaps the unstable system of minor influences and in this way stabilized.
  • the property of Ultrasonic waves 13, 14 and 15 exploited that when they hit the printing ink their adhesive power down to a value of less than 10% of the initial situation belittle.
  • the targeted and focused application of Ultrasonic waves 13, 14 and 15 a line of premature tearing of the tear threads 9 created directly behind the pressure gap 7.
  • the break angle ⁇ would be without the use of the ultrasonic waves 13, 14 and 15 increase with increasing machine speed and with decreasing Reduce machine speed. Due to the ultrasonic waves 13, 14 and 15 controlled tearing of the tearing threads 9, the tearing line 8 is stabilized so that the predetermined tear-off angle ⁇ when the machine speed changes is kept constant. The changes also when changes are made to other factors Tear line 8 no longer in front of or along the circumferential line of the blanket cylinder 4 back.

Landscapes

  • Printing Methods (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Cleaning In Electrography (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Manufacturing Of Printed Wiring (AREA)
EP01112212A 2000-06-09 2001-05-18 Procédé et dispositif pour enlever une feuille imprimée d'un cylindre Expired - Lifetime EP1162067B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10028667 2000-06-09
DE10028667A DE10028667A1 (de) 2000-06-09 2000-06-09 Verfahren und Vorrichtung zum Ablösen eines Bedruckstoffes von einem Zylinder

Publications (2)

Publication Number Publication Date
EP1162067A1 true EP1162067A1 (fr) 2001-12-12
EP1162067B1 EP1162067B1 (fr) 2006-03-08

Family

ID=7645285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01112212A Expired - Lifetime EP1162067B1 (fr) 2000-06-09 2001-05-18 Procédé et dispositif pour enlever une feuille imprimée d'un cylindre

Country Status (5)

Country Link
US (1) US6550390B2 (fr)
EP (1) EP1162067B1 (fr)
JP (1) JP2002037497A (fr)
AT (1) ATE319565T1 (fr)
DE (2) DE10028667A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10311234A1 (de) 2003-03-14 2004-09-23 Heidelberger Druckmaschinen Ag Bedruckstoffbahn verarbeitende Maschine
US7998708B2 (en) * 2006-03-24 2011-08-16 Handylab, Inc. Microfluidic system for amplifying and detecting polynucleotides in parallel
DE102010003011A1 (de) * 2010-03-18 2011-09-22 Manroland Ag Druckzylinderbogenführungsvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD104753A1 (fr) * 1972-07-22 1974-03-20
DE3344424A1 (de) * 1983-12-08 1985-06-27 Fa. J.G. Mailänder, 7120 Bietigheim-Bissingen Verfahren und vorrichtung zur fuehrung von blechdruckmaschinen oder blechlackiermaschinen durchlaufenden blechtafeln od. dergleichen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE104753C (fr)
DE19613963C2 (de) * 1996-04-09 1999-03-04 Heidelberger Druckmasch Ag Vorrichtung zum Ablösen eines Bogens von einem Gummizylinder einer Druckmaschine
DE19943029A1 (de) * 1998-10-08 2000-04-13 Heidelberger Druckmasch Ag Vorrichtung und Verfahren zur Vereinzelung von Bedruckstoffbögen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD104753A1 (fr) * 1972-07-22 1974-03-20
DE3344424A1 (de) * 1983-12-08 1985-06-27 Fa. J.G. Mailänder, 7120 Bietigheim-Bissingen Verfahren und vorrichtung zur fuehrung von blechdruckmaschinen oder blechlackiermaschinen durchlaufenden blechtafeln od. dergleichen

Also Published As

Publication number Publication date
US6550390B2 (en) 2003-04-22
EP1162067B1 (fr) 2006-03-08
JP2002037497A (ja) 2002-02-06
US20010050018A1 (en) 2001-12-13
ATE319565T1 (de) 2006-03-15
DE10028667A1 (de) 2001-12-13
DE50109129D1 (de) 2006-05-04

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