Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F35/00—Cleaning arrangements or devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
  • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
  • B41F19/06—Printing and embossing between a negative and a positive forme after inking and wiping the negative forme; Printing from an ink band treated with colour or "gold"
  • B41F19/062—Presses of the rotary type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
  • B41P2235/00—Cleaning
  • B41P2235/10—Cleaning characterised by the methods or devices
  • B41P2235/20—Wiping devices

Definitions

• the invention relates to a method and a device for transferring imaging or covering layers from a carrier foil to printed sheets according to the preamble of patent claim 1 and of patent claim 18, respectively.
• EP 0 569 520 B1 describes a printing material and a printing device using this material.
• a sheet-fed machine with a feeder and a boom, printing units and a coating unit are arranged.
• an adhesive pattern is applied as a printed matter in the planographic printing process.
• a counter-pressure cylinder, a pressure roller and a film guide are provided in the loading-stratification after the printing unit.
• a foil strip is guided through the transfer nip of the coating unit between impression cylinder and press roll from a film supply roll and wound up again on the exit side after leaving the coating unit.
• the transfer film contains a carrier film on which functional layers of various types, such as metallic layers, for example of aluminum, or plastic layers can be applied. Between functional layer and carrier film, a separating layer is provided, by means of which the functional layer can be removed from the carrier layer.
• a printing sheet After a printing sheet is provided with a two-dimensional adhesive application or an adhesive pattern, it is passed through the coating unit, wherein by means of the pressure roller, the pressure sheet lying on the impression cylinder is brought into contact with the film material.
• the down-facing functional layer engages tightly with the adhesive-provided areas on the signature. Thereafter, the functional layer adheres only in the area of the adhesive-provided pattern or else entire adhesive layer. rich, wherein the carrier film, the functional layer is removed in the region of the adhesive pattern.
• the print sheet is laid out in the coated state.
• Cleaning devices in printing machines such as printing cylinder washing devices or blanket washing devices, are known per se. These can be designed as cloth washing devices or brush washing devices, also in combination with extraction systems. Likewise suitable for such purposes are plate cleaning systems by spraying and suction comparable to a Vorrich- device according to DE 195 26 574 A1. Furthermore, spray-suction elements in a traversing arrangement comparable to a device according to DE 195 20 551 A1 are suitable. Furthermore, cleaning devices are designed as pure suction devices, e.g. as suction strips, usable.
• the object of the invention is therefore to provide a method according to the preamble of claim 1 and a device according to the preamble of claim 18, by means of which a film coating of printed sheets can be simple, secure, economical and accurate, and method and apparatus should be easy to handle and In particular, contamination of the coating area by film waste or impurities originating from the transfer film should be avoided.
• an apparatus and a method for cleaning the press roller and / or the film web which is contaminated with film waste or linting of the film edges is proposed.
• the press roll and / or the guide of the film web are provided with a cleaning system.
• This can be a known so-called brush washer or a cloth washer or a suction, as they are widely used in printing machines.
• Klischeemassanlagen which act by means of the action of a spray and an associated suction device. But it can also be provided in a traversing arrangement, the arrangement of a spray-suction element. Finally, a stripping brush can be provided in a rotating arrangement with integrated suction.
• the cleaning system is operated inline, i. During the application process, impurities that are continuously accumulated in the press nip are disposed of from the transfer film or film waste. Likewise, the cleaning of the press roll can be done offline, i. the cleaning of the press roller takes place after the end of the application process.
• the cleaning can be supplemented by a method and a device which refers to the removal of film residues by means of a suction device on the film web itself.
• devices can be used which are arranged similar to a vacuum cleaner on the film guide.
• a combination of film guide and suction device can be used for this purpose.
• the or a suction device can also be employed as an alternative or in addition to the press cylinder in order to suck off loose particles adhering thereon from the film web.
• the device can also be used for the printing process, which can be used on the printing unit when the film application is not switched on. Furthermore, one can be integrated into a control station of the press. Tied-up and automated processes generate software that ensures that the necessary processes are coordinated with each other. The automated cleaning of the press roll takes place without additional removal of transfer film and therefore offers a great time savings.
• FIG. 1 shows a printing machine with a film transfer device.
• FIG. 1 shows parts of a sheet-fed rotary printing press with two printing units.
• a printed sheet is first provided with a two-dimensional or imaging adhesive pattern (printing unit as commissioned work 1).
• the printed sheet is guided together with a transfer film 5 under pressure through a transfer nip 6 (coating unit 2).
• the applicator 1 may be a known per se offset printing unit with an inking unit 11, a plate cylinder 12 and a blanket cylinder 13.
• the blanket cylinder 13 cooperates with a counter-pressure cylinder 4.
• the coating unit 2 can also be formed by an offset printing unit.
• the transfer nip 6 in the coating unit 2 is formed by a press roll 3 and an impression cylinder 4.
• the press roller 3 may correspond to the blanket cylinder.
• the press roll 3 may also correspond to the forme cylinder of a paint module.
• a web guide 14 is shown for transfer films.
• the transfer film 5 is thereby switched on and executed by protective devices 15 of the coating unit 2.
• an integrated in the applicator 1 film transfer device may be provided, whereby an integrated film application module is created.
• a press roll 3 ' is assigned downstream of a printing gap between a blanket or form cylinder 13 and the impression cylinder 4 on a counter-pressure cylinder 4.
• the cold foil embossing thus takes place in a single integrated film application module FA, as indicated in FIG.
• an applicator can also be arranged in a compact design within the coating module in an integrated film application module FA.
• an adhesive application device 1 ' is assigned to the impression cylinder 4 and arranged upstream of the transfer nip, which would be provided here between the blanket cylinder 13 and the impression cylinder 3.
• the transfer film would be guided here around the blanket cylinder 13 or approximately tangentially past it through the designated printing nip.
• Such an adhesive applicator device 1 ' may consist of a compact forme cylinder for supporting a printing form for the adhesive and an applicator of a chamber doctor blade and an anilox roller for supplying the adhesive.
• the adhesive application is first carried out on the printing substrate and the film application is carried out immediately thereafter.
• the film supply roll 8 is assigned to the coating unit 2 on the side of the sheet feed.
• the film supply roll 8 has a rotary drive 7 for the continuous controlled feeding of the transfer film to the coating unit 2.
• a film feed deflection or tension rollers for guiding the transfer film 5 may be provided in a substantially constant tension against the press roller 3.
• a film collecting roll 9 is provided for the used sheet material.
• a rotary drive 7 on the film collecting roller 9 is always advantageous. It can even be provided that the transfer film 5 is conveyed on the outlet side by means of the rotary drive 7 and held taut on the inlet side by means of a brake.
• the press roll 3 (as a blanket cylinder or forme cylinder or separate press roll) carries on its surface a compressible or damping, e.g. also provided with a compressible intermediate layer element.
• the press roll 3 can be provided with a press fabric 10, for example as a plastic cover, comparable to a blanket or blanket, which is held in a cylinder channel on clamping devices.
• the film feed of the transfer film 5 from the film supply roll 8 to the transfer nip 6 and the film collection roller 9 is gradually controlled, the transfer film 5 is then stopped, if no transfer of imaging or covering layers should take place.
• the associated device preferably includes a corresponding feed control for the transfer sheet 5, which ensures that at least the lying in the region of the press roller 3 and the impression cylinder 4 part of the film web is stationary as long as the cylinder channel passes.
• a further improvement of the film utilization of the type described results when the transfer film 5 is divided into one or more Operafolienbahnen lesser width.
• the utilization of the transfer film 5 can be improved even in zonally different lengths coating areas within an arc.
• the film application module thus formed from the applicator 1 and the coating unit 2 dryer 16 may be provided by means of of which the adhesive application or the entire film coating can be dried.
• UV dryers come into question.
• the film application module may include a monitoring device 17 for scanning the sheet surface.
• the monitoring device 17 enables the evaluation of image contents of the coating and the detection of defects in the film coating.
• Such a monitoring device can also be provided in conjunction with the printing press, in which the film application module is integrated. Then it can be arranged for example in the sheet delivery of the printing press or a last printing unit.
• an apparatus and a method for cleaning the press roller 3, which is contaminated with film waste or linting of the film edges are used.
• the impurities occur as mica, mica dust, e.g. on the cutting edge of the film web 5.
• Mica preferably lays down in the area of the format edges of the film web 5 on the surface of the press roll 3, 3 'and accumulates there cumulatively.
• the press roller 3 is provided with a cleaning device R. This may be a known so-called brush washer or a cloth washing system, as they are widely used in printing machines. These systems can also be combined with suction devices
• cleaning devices R of the press roll 3 can alternatively be arranged in the sheet transport direction on the front or rear side of the circumference of the press roll 3. Furthermore, a cleaning device R 1 can be arranged on the pressure roller 3 '.
• the cleaning devices R, R ' are arranged on the circumference of the press roll 3 and the pressure roller 3 and arranged ab nieth.
• holders and motion drives of known type are arranged in the coating unit 2 or foil application module FA.
• a cleaning device R or R ' is preferably operated inline. This means that the cleaning devices R or R 'disposed of during the coating process by means of the coating unit 2 and the film application module FA continuously in the press nip 6 impurities or film waste from the transfer film.
• at least one cleaning device R or R ' is permanently attached to a region of the press roll 3 or the pressure roll 3' free of the transfer film 5.
• the cleaning of the press roll 3 can take place offline, i. the cleaning of the press roll 3 takes place after completion of the coating process.
• Klischeemakers are known from the application in flexographic printing machines and act by means of the action of a directed onto the surface to be cleaned spray jet and the flushed impurities receiving suction device.
• the arrangement of a similar-acting spray suction element can be provided in a traversing arrangement.
• Both devices can also be used during the coating operation on the press roll 3, 3 '. In this way, the press roller 3, 3 'constantly be kept free of impurities.
• cleaning devices which have only one suction device, such as e.g. a suction bar.
• a stripping brush can be provided in a rotating arrangement with an integrated device in the stripping brush for the extraction of the stripped contaminants.
• this can also be used for the conventional printing process if it is used on the printing unit when the film coating is not used. Then the cleaning device R can be used on the printing blanket cylinder or the impression cylinder 4 for cleaning its surface from color contamination.
• a software coupled to the machine control of the printing press and automated software can ensure that a corresponding coordination of the required processes of coating and cleaning takes place on one another.
• the automated cleaning of the press roll takes place without additional removal of transfer film and therefore offers a great time savings.
• the latter also applies in particular to the offline cleaning, which takes place in the case of transfer film 5 dissolved by pressing roller 3 or pressure roller 3, so that transfer film 5 is guided at a distance from the surface of pressing roller 3 or pressure roller 3 ' that the press roll 3 or pressure roll 3 'can rotate without film transport.
• the controller can ensure that the cleaning of units involved in the coating process is coordinated with one another.
• an inking unit, an applicator unit, a press roller and the associated printing cylinders can be cleaned offline.
• the use of cleaning equipment in connection with film transfer applications is not limited to the examples described. Rather, it can also be applied to other areas of the guidance of the film web. This is possible, for example, in the area of guide elements or film rolls or web drives or dancer rolls.
• cleaning devices in the form can also be arranged directly in connection with a guide device of the film web of the transfer film 5.
• cleaning devices can be arranged both on one side and on both sides of the film web.
• the cleaning devices can also be assigned to the edges of the film web, since there the dirt particles or mica particles from the film cut preferably occur.
• cleaning devices may be arranged on the film web both in the region of the feed of the transfer film 5 to the transfer nip 6 and in the region of the discharge of the transfer film 5 from the transfer nip 6. This ensures that particles which are first in the transfer nip, e.g. released by the transfer process and dragged along by the film web, can also be removed safely and thus can not pollute the printing press.
• the cleaning devices on the film web are preferably designed as suction devices.
• suction devices can be designed in the manner of so-called vacuum cleaner devices, as known from the field of sheet guides on sheet-fed printing machines.
• the cleaning devices R 1 R ' can also be designed as combined devices for cleaning the press rolls 3, 3 1 and the corresponding film webs 5, 5'.
• a suction device is also suitable for this purpose. net, which is equipped with corresponding areas of action in the direction of the various elements involved in the transfer process.
• the cleaning devices R, R ' can for the combined use of the press roll 3, 3' and the film web of the transfer film 5, 5 'also partially mechanically acting elements, such as brushes, and in addition pneumatically acting elements, such as suction slots have.
• the pneumatically acting cleaning elements can be made later mountable on the mechanically acting cleaning device R, R 1 .

Landscapes

• Inking, Control Or Cleaning Of Printing Machines (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (2)

Family

ID=38109028

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (6)

Family Cites Families (13)

• 2006
  • 2006-12-02 DE DE102006056897A patent/DE102006056897A1/de not_active Withdrawn
  • 2006-12-09 WO PCT/EP2006/011878 patent/WO2007073852A2/de not_active Ceased
  • 2006-12-09 JP JP2008547869A patent/JP2009521349A/ja not_active Withdrawn
  • 2006-12-09 EP EP06829470.1A patent/EP1981655B2/de not_active Not-in-force
  • 2006-12-09 CN CN2006800492974A patent/CN101346192B/zh not_active Expired - Fee Related

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