Classifications

• • 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
• • 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
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F33/00—Indicating, counting, warning, control or safety devices
  • B41F33/0036—Devices for scanning or checking the printed matter for quality control
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F33/00—Indicating, counting, warning, control or safety devices
  • B41F33/0036—Devices for scanning or checking the printed matter for quality control
  • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply

Definitions

• the invention relates to a device in a machine for transferring imaging layers from a carrier film to printing sheet according to the preamble of patent claim 1.
• EP 0 569 520 B1 describes a printing material and a printing device using this material.
• a sheet-processing machine which has a feeder and a boom, between two units printing units and a coating unit are arranged.
• an adhesive pattern is applied by means of the planographic printing process. This adhesive pattern is applied in a cold printing process and has a specific imaging subject.
• a film guide is provided in the printing unit following the coating unit with a counter-pressure cylinder and a press roller.
• the transfer film has a carrier layer on which imaging layers such as metallic layers, for example of aluminum, can be applied. Between the metallic layer and the carrier film, a separating layer is provided, which ensures that the metallic layer can be removed from the carrier layer.
• each sheet is given an adhesive pattern. Thereafter, the sheet is passed through the coating unit, wherein brought by means of the press roller on the impression cylinder resting sheet associated with the film material becomes. In this case, the downwardly lying metallic layer enters into a close connection with the areas provided with adhesive on the printed sheet. After further transporting the printing sheet, the metallic layer adheres only in the area provided with the adhesive pattern. The carrier film is thus removed from the metallic layer in the region of the adhesive pattern. The used in this way transfer film is wound up again. The print sheet is laid out in the coated state.
• the object of the invention is therefore to provide a device by means of which the transfer of an imaging layer to a printed sheet can be carried out economically and reliably, the device being intended to be easy to handle.
• the setting of a printing unit which is arranged as a suitable for the film transfer coating unit as a commissioned work for adhesive by incorporating a device for controlling the color density so that in this commissioned work for the film transfer process favorable settings in a simple manner can be done.
• the adjustment of the adhesive feed to the coater for the film transfer preceding the commissioning unit is performed in the function of a printing unit.
• the adhesive is used like a printing ink and measured by means of a color density measuring system on the printed sheet.
• the adhesive is colored with a special color, which is matched to the film to be transferred and at the same time good metrological detectable.
• the adhesive application can be easily controlled in this way and, if desired, even regulated with respect to a required order quantity.
• the device can advantageously also be used even if an improvement in film utilization is to be achieved by dividing the transfer film into one or more partial film webs of lesser width. In combination with the above-mentioned method, it is thus also possible to use different types of film side by side.
• Figure 1 an overview of a printing press with a
• FIG. 2 shows a printing press with control station
• FIG. 4 shows a printing press with automation devices.
• FIG. 1 shows a sheet-processing machine which consists of at least two printing units. There, a printing sheet in the first printing unit is provided with an imaging adhesive pattern (applicator 1). Thereafter, in the follow-on printing unit together with a printing sheet, a transfer film 5 is guided through a transfer nip 6, the transfer film 5 being pressed in the transfer nip 6 against the printing sheet (coating unit 2).
• the applicator 1 may be a known offset printing unit with an inking unit 11 a plate cylinder 12, a blanket cylinder 13 and a sheet leading impression cylinder 4. Likewise, this may be a so-called paint module in which the blanket cylinder 13 is formed as a forme cylinder.
• the plate cylinder / forme cylinder is coated with an adhesive medium, which is formed as an ink or adhesive, from e.g. as a chamber doctor blade trained device instead of the inking unit 11 supplies.
• 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, the blanket cylinder and the impression cylinder 4 correspond to the impression cylinder of an offset printing unit.
• the press roller 3 can correspond to the forme cylinder and the impression cylinder 4 to the impression cylinder of a paint module of a sheet-fed press.
• the transfer films 5 have a multilayer structure. They have a carrier layer on which an imaging layer is applied by means of a release layer. The separating layer serves to facilitate lifting of the imaging layer from the carrier layer.
• the imaging layer may be e.g. a metallized layer or a glossy layer or a texture layer or a colored layer or a layer containing one or more image patterns.
• a film supply roll 8 and a film winding roll 9 are assigned to the coating unit 2 for film feed and removal.
• the film rolls 8, 9 each have a rotary drive 7 for the continuous controlled feeding of the transfer film 5 to the coating unit 2. In the area of the film feed deflecting or
• the Transfer film 5 is also moved by the rotary drive 7 on the discharge side and kept taut on the inlet side by means of a brake.
• the transfer process of the imaging, eg metallized, layer onto the printing paper takes place in the transfer nip 6 between the press roll 3 and the counterpressure cylinder 4.
• a press roller 3 ' (see FIG. 1 in the applicator unit 1) can be arranged downstream of the transfer nip between blanket cylinder 13 and impression cylinder 4 and assigned to the impression cylinder 4.
• a transfer film 5' can be placed on a sheet held on the printing cylinder 4, so that the image-forming or metallizing layer can be made there directly downstream of the imaging adhesive application.
• the press roll 3 is provided with a press fabric 10, e.g. be provided as a plastic coating, comparable to a blanket or blanket.
• the press fabric 10 is held in a cylinder channel on jigs.
• the film advance of the transfer film 5 from the film supply roll 8 to the transfer nip 6 and the film collection roll 9 is controllable so that as far as possible the transfer film 5 is stopped, if no transfer of the imaging layer should take place or can (channel pass).
• An improved film utilization results when the transfer film 5 is divided into one or more Operafolienbahnen smaller width.
• a web guide for transfer films 5 is provided with Folienleitwalzen 14, by means of which the transfer sheet 5 is fed to the transfer nip 6 and discharged therefrom.
• contactors 15 are provided.
• Further devices 20, 23 are used to monitor the film guide with regard to the presence of the film web 5 and its web tension.
• the control of the printing or transfer process can be supported.
• the system of applicator 1 and coating unit 2 can be connected to a control station of the printing press. Setpoints for maximum and minimum web tension can be entered at the control station. This may depend on the type of transfer film 5 used and on the printing or transfer conditions in the coating module 2 in connection with the properties of the printing material, the adhesive or the press fabric 10.
• the necessary data can be read via interfaces directly from data carriers to film supply rolls 8 and changed by means of parameter values from the setting of the transfer process on the coating module 2.
• the sheet from the coating unit 2 is transferred from the impression cylinder 4 via a sheet transfer drum or a sheet transfer unit to a counter-pressure cylinder 40 of the printing unit 50.
• the printing unit 50 has, as usual in offset printing units, the counter-pressure cylinder 40, a rubber or blanket cylinder 41 associated therewith, and a plate cylinder 43 associated therewith.
• the plate cylinder 43 are here shown schematically an inking unit and a dampening unit assigned. Between the counter-pressure cylinder 40 and the blanket cylinder 41, a further pressure gap 60 is formed. In this printing nip 60, printing ink is applied to the printing sheet from a printing plate 44 mounted on the plate cylinder 43 via a cover 42 arranged on the blanket cylinder 41.
• the press nip 60 an approximately line-shaped pressure is exerted on the printed sheet, which also acts on the image parts of the metallic coating. It is provided here that the pressure in the press nip 60 is matched to the pressure provided in the transfer nip 6.
• a so-called machine control is provided for the control of the process sequences.
• This control provides all adjustment options for the printing unit 50 and the printing units of the printing press, which are included in the coating unit 2 and the commissioned work 1 ready.
• a control device is further provided in connection with the machine control, on which an interface to a color measuring system is formed and which serves to monitor the print quality of the printed and coated signatures.
• the printed sheets are measured with printed color measurement or color control fields visually with regard to their density or colorimetric remissions.
• the measured values are used to control and regulate the ink supply of the printing units of the printing press.
• the device in conjunction with the measuring system forms a color measuring and control system.
• the abovementioned color measurement or color control fields are usually designed in the manner of control strips and arranged at the beginning or end over the entire printed width of the printed sheet and can thus be easily scanned on the color measuring system and thus detected by measurement.
• a special arrangement of color control fields in a local distribution over a printed sheet this is especially true in the field of packaging printing - also common in the way that the color control fields can be distributed in strips in non-useful areas of a sheet.
• Color measuring systems for densitometric or colorimetric recording of print quality data on printed substrates can be separated as offline, ie separated from the printing process, by means of a device arranged next to the printing press (90 in FIG. 2) or as an inline measuring system (17 in FIG. 1; 70 in FIG. 2/3, 108 in Fig. 4), so in the printing process online measuring devices to be arranged within printing presses.
• the quality measurements are taken individually using the offline measurement system 90 (see FIG. 2) Measured printing patterns and the machine control or the controller for the color guide of the printing press 100 transmitted.
• the measured values in the in-line measuring system 17 are constantly measured on the currently printed copies while the printing process is running and then the machine control or the color guide controller of the printing press 100, for example, in communication with a control panel 80 (see Fig. 2).
• the invention also provides that in a setting of the printing machine 100 for the process of cold foil transfer as well as the application of adhesive in the applicator 1, 123, the data evaluation of the color measurement and control system from the quality measurement is used.
• control fields 202 are provided for the adhesive medium or the adhesive. These can, as indicated in FIG. 5, be arranged in the region or together with color control strips 200 together with color measuring fields 201 for the further colors to be printed on the printed sheet B. Therefore, the adhesive medium control panels 202 can be measured simultaneously with the color measurement panels 201 of the other colors.
• the setting of the adhesive supply in the applicator 1, 123 can in this way so much be automated that a large amount of expensive waste paper can be saved when retracting the method of cold foil transfer.
• the control fields 202 are assigned only to the regions of the film application which are shown here as film substrate F.
• the foil F also corresponds to the adhesive pattern or adhesive component applied in the application unit 1.
• the print image or print subject S is independent of the adhesive subject.
• the color control fields 201 are therefore arranged over the entire width of the printed sheet B in the print control strip 200.
• This adhesive medium or this adhesive may in principle be a pigment-free, ie colorless printing ink.
• the printing ink used as the adhesive medium or adhesive is colored, for example, in a coordinated manner with the color of the film layer to be transferred. In this way, additional color effects can be produced or the base color of the film layer can be optically supported.
• the color of the adhesive medium or adhesive can also be chosen so that it is easily detectable by measurement.
• the parameter values of the adhesive are to be matched to the planned cold foil transfer.
• an optimum amount of adhesive is thus determined as the target value, from the specification of which it can be determined online and in the control loop whether sufficient adhesive is present for reliable bonding of the film to the printed sheet B or if there is too little or too much adhesive is, so that poor adhesion or a poor coating image are expected from adhesive surplus.
• control fields 202 can be reliably detected, it can be provided that no film transfer should take place in the area of the control fields 202.
• This procedure way allows the control panels 202 can be measured inline during the production process and so a constant quality control can be performed together with the printing inks.
• the press fabric used for the film transfer 10 can be recessed on the press roller 3 in the areas of the control fields for the adhesive, so that the transfer film is not pressed against the substrate when overflowing these areas and so no film transfer takes place.
• FIG. 2 is to be interpreted in such a way that the printing unit 50 is represented as a coating module, but is also functionally to be evaluated as a printing unit. Therefore, a printing unit or several printing units could be used instead of the paint module shown.
• the change of a pressure provision or of the effective pressure acting in the transfer nip 6 or the pressure nip 60 can be effected by changing the pressure position of a blanket cylinder or changing the clothing of the press roll 3 or the blanket cylinder 41.
• the press fabric 10 or a blanket / blanket 42 so-called underlay sheet 47 are assigned to the respective cylinder 3 and 41, respectively.
• Their change leads to an enlargement or reduction of the gap dimension in the respective effective gap 6, 60, when the relative position of the respective cylinder 3, 41 with respect to the counter-pressure cylinder 4, 40 involved is not changed.
• the final dimension of the diameter of the cylinder 4, 40 combined with the tensioned clothing (press fabric 10 or blanket / blanket 42, possibly pad sheet 47) results from the thickness of the fabrics. Therefore, it can be provided that the dimensions of the thickness of the press fabric 10, the blankets / blankets 42 and the pad sheet 47 are manually or automatically read into the machine control.
• a readable marking 48 for function data such as the size of the thickness dimension thereof can be provided on the press covers 10, the blankets / blankets 42 and the underlay sheet 47.
• the reading out or recognition of the data must be carried out with appropriate aids.
• Suitable readers 70 may be placed inside or outside the printing machine or in conjunction with operating instructions. In this case, the readers 70 may also be connected via or within the machine control with a control station 80 or a printing tower of the printing press.
• the assignment of the color measuring device to the detection of the check fields 202 in the print control strip 200 according to FIG. 5 is also possible.
• the readers 70 can then be arranged inline and measure the control fields on the sheet B (also shown here as an alternative thin and thick substrate) on the impression cylinder 4.
• the data transfer to the machine control and the storage of the data, which sets the relative position of the press roller 3 and the blanket cylinder 41 to the respective impression cylinders 4, 40, can be carried out by customary means. The same applies to the measurement of color densities / color values at this point.
• color measurement and control can generally be combined as an inline process with a system of inline color measurement and control.
• This requires specific machine configuration and procedures. Therefore, by means of a printing press according to FIG. 4, the adhesive can first be set up and controlled automatically. In this case, neither sample sheets have to be drawn nor must the printing press be stopped for control and regulating operations. Thereafter, the cold foil transfer can be performed. Finally, the sheet coated in this way can still be printed or lacquered with applied ink.
• a print control strip 200 lies in the film-free area of the print sheet B.
• This print control strip 200 can be measured inline and with the obtained Values the color scheme are regulated.
• the printed sheet B coated with the foil F and subsequently printed and possibly varnished is measured and then the coloring can be corrected.
• the aim as with the already standardized ink and register control of the ink, is to ensure uninterrupted production with automated measurement and control in an inline process, even when operating with cold foil transfer.
• an in-line color measuring device can also be provided in FIG. 1 instead of the inspection system 17.
• the inline measuring and control method offers further automation and production steps for quality assurance and assurance.
• an investor logistics is provided to supply the printing presses 100 with printing material, which consists of a stack conveyor in conjunction with a feeder 114 and automatic stack feed to the printing press 100. Furthermore, for conveying printed material from the printing machine 100, boom logistics in conjunction with a boom 122 and a stack transport system from the boom 122 are provided in a warehouse or for further processing.
• the printing units 103 are designed as offset printing units and designed for automated operation. For this purpose, facilities are provided which make it possible to ensure that all adjustments and supply of supplies can be made without manual intervention.
• Automated dyeing and dampening units are provided in each of the printing units 103 of the printing machine 100, which are equipped with devices for remote controlled and controllable adjustment for lifting cycles, trimming inserts and strokes, selectable roll centering positions, variations in the speed of the duct etc.
• an automated dyeing and adhesive supply as a line system or cartridges directly on the ink fountain of each printing unit 103rd
• the plate cylinders (forme cylinders) of the printing machines 100 are each provided with a direct drive independent of the main drive.
• simultaneous washing functions and / or simultaneous color advance programs and / or flying job changes can be carried out by means of appropriate controls.
• one or more coating units 104 upstream, intermediate or downstream of the printing units 103.
• the design can be designed as a paint modules or Inlinelackierwerk on the printing unit.
• an automatic paint supply including temperature control of the paint and / or viscosity control system for the paint is furthermore provided.
• a lower elevator made of a flexible carrier material is provided on a rubber or forme cylinder of a printing unit 103. On this several base forms are arranged at intervals. The elevator is movable in tension shafts on the cylinder circumference, so that in each case a pad shape can be positioned to the upper elevator.
• Such a device can also be used in a device for cold foil transfer in order to enable format-related application during coating with film material.
• the indentation and the positioning of punching die of the embossing forms in a printing unit 103 or in a paint module 104 are made possible by automatic and semi-automatic change systems. These changing systems can also be used for coating plates or press covers in coating unit 123.
• a sheet turning device 120 is provided, which allows a mode of operation for front and back printing of sheet and their conversion for the printing machine 100 from the Perfecting mode on the perfecting and also vice versa is automated.
• Quality control is carried out by means of in-line inspection systems and / or inline densitometry measuring devices 108. These can optionally be configured as linline
• Color density measuring and control device or be arranged as an inspection system before and after a sheet turning device 120 in order to capture and evaluate both printed substrate pages in perfecting and can.
• the measurement systems 108 are also equipped to measure colorimetric readings or to control paint coatings or film coatings as produced by the cold film transfer system.
• the machine control station is equipped with storage functions for all press and order-related setting and measured values, so that they can be called up for repeat orders.
• the machine control center and the machine control are further characterized by an integration into a printer network with prepress, logistics, material supply, other printing presses and pre- and post-processing.
• Quick-start facilities with start procedures for inking, dampening, printing, sheet feeding, sheet removal, waste paper feed and discharge, coupling of the investor, etc. provided.
• An executable with such a device method is applied in the printing machine according to the invention, in particular a sheet-fed rotary offset printing machine with multiple printing, coating and further processing units. It contains the steps explained below.
• the setting-up process of the printing machine 100 for the start of production is carried out automatically using precursor data, data of the printing material, data of the current or a previously processed similar print job. For this purpose, all process data is transferred from the work preparation to the machine control station or the machine control for machine presetting with respect to the data of the printing material, the subject, the printing ink and the varnish used, as well as to other production options that can be carried out in the printing press.
• the use of machine-specific data to optimize the print quality such as the input and recording of wear levels of machine elements, such as rollers in dyeing and dampening
• the use of self-learning programs for the color pre-setting and dampening solution setting recognize from the change of presetting data under certain process conditions (depending on the type of substrate, printing ink, amount of ink, subject and other parameters, as preferably to be printed in a specific machine under certain conditions and fits deposited characteristics when they occur
• specific data for the application of the adhesive medium or of the adhesive is determined and made available, taking into account the amount of adhesive required to process certain film layers differently for certain substrates
• the type of adhesive or its composition is specified and defined with regard to the optically determinable measured values.
• the automated dampening with tracking of the dampening solution supply is carried out depending on the coloring and the respective operating state of the printing machine and on external parameters. Furthermore, quality control is carried out by register measurement / regulation. In addition, the registration accuracy is determined in the sheet feeder and printing unit. A trailing edge register is evaluated when a perfecting is performed.
• a color matching for the front and back of the sheet is done by a double inline measuring and control system 108.
• the sheet front side is measured before the sheet turn 120 and evaluated after completion of the back page printing the image of the back.
• a measurement with register setting is carried out for the production of an exact so-called reversing pass.
• the quality control with regard to lubrication and scratches takes place from the sheet movements that occur during turning operation.
• a double in-line inspection system is provided, which is automatically coupled to the control device of the printing press 100 in the case of the reversing operation.
• the devices are also used for the application of cold foil transfer.
• the quality and quantity of the printed adhesive is monitored inline and used to control the applicator 1.
• process data evaluation / storage is to store process-relevant data and settings with peripheral devices for repeat jobs in the machine control.
• the process data is handled as follows:
• the establishment of a cold foil transfer process can take place as follows: a) transfer transfer film 5 in coating module 2 b) load adhesive medium / adhesive in applicator 1 c) load preset for adhesive dosing in film substrate F from precursor d) perform proof print / coating e) Inline or offline control fields 202 g) Starting the production process with film transfer in the coating module 2 and ink supply in other printing units 103, 50 i) measuring the color control fields 201 and regulating the ink feed LIST OF REFERENCE NUMBERS

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• Engineering & Computer Science (AREA)
• Quality & Reliability (AREA)
• Printing Methods (AREA)
• Rotary Presses (AREA)
• Adhesives Or Adhesive Processes (AREA)

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• 2009
  • 2009-05-05 DE DE102009002822A patent/DE102009002822A1/de not_active Withdrawn
  • 2009-05-06 US US12/994,664 patent/US20110214581A1/en not_active Abandoned
  • 2009-05-06 WO PCT/EP2009/055452 patent/WO2009144120A1/fr active Application Filing
  • 2009-05-06 JP JP2011510931A patent/JP2011522718A/ja not_active Withdrawn
  • 2009-05-06 AT AT09753775T patent/ATE534517T1/de active
  • 2009-05-06 EP EP09753775A patent/EP2296890B1/fr active Active

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