JP2009012471A - Sheet-fed rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make pasting with no remaining part and working of a laminating film possible by providing a separating method for efficiently separating the webby film into split shreds in the pasting work or laminating work device of a sheet-fed rotary press. <P>SOLUTION: In the sheet-fed offset press equipped with at least one printing unit A and finishing work device B, a device for performing a planate pasting or laminating work to a printing sheet is concerned. In this device, a press gap 12 for pasting a pasting or laminating film 7 to the printing sheet is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet-fed rotary printing press comprising an apparatus for laminating or laminating a printed product according to claim 1.

  Patent Document 1 discloses a cold film transfer method for use in a printing press. In this document, a sheet processing machine having a paper feeding device and a paper discharging device is shown, and a printing device and a coating device are provided between two assemblies. In at least one of these printing apparatuses, the adhesive pattern is applied using a lithographic printing method. Such an adhesive pattern is provided by a non-heated printing method, and has a pattern that provides a specific image portion. A film guide is provided in a coating apparatus provided with an impression cylinder and a press roller, which is provided subsequent to the printing apparatus. The concept of this film guide is that a film strip or transfer film is guided from a film stock roll through a pressure gap between an impression cylinder and a press roller. When the sheet is conveyed through the printing apparatus, an adhesive pattern is provided on each sheet. Thereafter, the printed sheet passes through the coating device. At this time, the printed sheet placed on the impression cylinder is combined with the film material by the press roller. In that case, the layer, often made of metal, facing downwards is intimately bonded to the area where the adhesive has been applied. After the printed sheet is further conveyed, the transferred layer adheres only to the pattern area where the adhesive is applied. That is, only the transfer layer is peeled from the carrier film in the region of the adhesive pattern. The transfer film consumed in this way is wound again. It is known to incorporate such a coating device into a printing device of a printing press, for example. It is also known to incorporate, for example, a printing apparatus blanket cylinder or impression cylinder as a press roller.

  In such a cold film transfer apparatus, only a relatively thin layer of up to several micrometers is transferred to the printing material. These layers are peeled off from the transfer film via an adhesive provided on the printing material, and transferred to a printed sheet. Since the transfer or transfer takes place part by part, the transferred layer is not provided on the printed sheet in a completely closed state. The layer may have microcracks that do not detract from the visual impression but interrupt the film transferred to the printed sheet. The transferred film is also interrupted if the adhesive applied by the preceding printing device has obstacles due to paper particles, for example also called slag formation. Since the film transferred by the cold film transfer method has a thin layer thickness and has the above-mentioned obstacles and interruptions, such a film is suitable for applications requiring barrier properties such as a water vapor-impermeable or moisture-proof layer. Is not suitable. Only small free fibers emerge from the surface of the paper and they act as a wick that absorbs moisture or other liquid substances into the printing material.

  It is also known to coat a printed sheet that has been printed in a sheet bonding machine with a sealing film made of a plastic material. Usually, the individual printed sheets in the flow are then laminated from the rolls by an endless film, and after lamination, the individual printed sheets are separated again via a separation technique. The separation can be done by weakening the film at the seam between individual sheets, where the film is shredded. However, solutions are also known in which the film is cut. Such a sheet paper laminating apparatus is described in Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5, in particular.

A high luminance value can be obtained by such endless bonding, but a barrier characteristic is also realized. For example, when a printed cardboard is coated with a plastic film, it can be used as an external advertisement. This type of coating is also often required for use as a moisture barrier in frozen packaging or as an oil and fat layer in aggressive oil packaging. The said oil-proof fat layer is required, for example, for packaging animal feed containing fats and oils.

The laminated layer also serves a decorative purpose. For example, metallic coatings or special effects and hazard prevention coatings (eg films with holograms). The laminated layer can be added as a reinforcement of the carrier material, thereby increasing, for example, the tear resistance of the packaging material.
European Patent No. 5695520 German Patent Invention No. 19817835 German Patent Application No. 4412091 German Patent Invention No. 4336835 German Patent Invention No. 1194562

  An object of the present invention is to provide a separation method for efficiently separating a web-like film into divided pieces in a laminating or laminating apparatus of a sheet-fed rotary printing press, whereby a laminating or non-residual portion is obtained. It is to enable processing of laminated film.

  The problem is solved by the features of claim 1.

  Further formation is described in the individual dependent claims.

  In the present invention, the web-like film is separated into individual pieces by a separation device. The length of the fragment is determined by the bonding or laminating surface of the printed sheet. After separation, the open end of the web-like film is fixed by a fixing device.

  Separation can be performed by providing perforations or openings of any form in the web-like film via the perforation processing apparatus. After the perforation points have passed through the fixing device, the fixing points prevent the film from being fed, while the divided parts connected to the intermediate carrier or the printed sheet are further transferred.

  In the following, the present invention will be described by way of examples based on the drawings. The drawings show the following.

  1 and 2, a printing apparatus A is provided in a sheet-fed rotary printing machine, particularly a sheet-fed offset printing machine, and the printing apparatus includes a plate cylinder 3, a blanket cylinder 4, and an impression cylinder 1. Furthermore, a finishing device B for performing planar bonding or laminating on the printed sheet is provided. The finishing device B comprises a press roller 5 and a further cylinder, which form a press gap 12. In the press gap, the bonding or laminating film 7 is stuck on the printed sheet. The bonded or laminated film 7 is fed out as a web-like film from the stock roll 8 in a feeding device. In the coating method, the film is not wound again after the laminating process or the laminating process. The web-like film is divided into film fragments via a separating device 11, and the film fragments are completely combined with the printed sheet.

The film is affixed to a printed sheet as a film sealed by a laminating or laminating apparatus. In this process, the film is unwound from the stock roller 8 and then between the press roller 5 and the impression cylinder 1. In the press gap 12, the printed sheet placed on the impression cylinder 1 is ironed. After reaching the required piece length, the film is shredded or cut off.
A feature of the present invention is that the entire film stays on the material to be printed and is further conveyed along with the printed sheet. For example, the carrier film is rewound again as in the cold film transfer method. There is no.

  The film transferred flat on the printed sheet can cover the entire printed sheet or only a partial area of the printed sheet format. An example of partial lamination or bonding of printed sheets is to leave a space at the end of the grip at the start of the printed sheet.

  Extending the piece length of a laminated or laminated film beyond the printed sheet format is a very significant application. In the very area where the film is cut to size, the flatness or surface quality of the film can be limited by cutting and the loss of web tension that accompanies the cutting. For example, the film can easily bounce off and hit a sheet of paper, which can limit the gloss and flatness of the laminated or laminated layers. The possibility described above can be avoided by selecting the fragment length somewhat larger than the printed sheet format. The printed image line portion is kept uniformly coated up to the edge of the sheet.

  The bonding or the transfer of the laminate film 7 is performed in the press gap 12 between the press roller 5 and the impression cylinder 1. At this time, the transfer of the web-like film or web-like film fragment is performed directly on the printed sheet, or partially or entirely via an intermediate carrier, for example, a roller on which the web-like film is placed.

  At this time, the web-like film 7 is separated into individual pieces by the separating device 11. The length of the fragment is determined by the bonding or laminating surface of the printed sheet. The definition of the fragment length can be detected from the prepress data or can be defined, for example, by user input at a machine control terminal or other operating device.

  After separation, the free end of the web-like film must be fixed by the fixing device 10. Otherwise, the free end of the web-like film may rebound. At this time, the fixing device 10 may be one suction roller or a group of suction rollers, one roller or a group of rollers, or a compressed air type suction bar. The roller has the advantage that it can also drive the roller, which can support the feeding of the web-like film while the film is fed. The roller is stopped when it is necessary to grip the end of the web-like film when separating the web-like film. In a gripping device that operates with compressed air, negative pressure is applied continuously or controlled according to the stage. Thus, for example, during the feeding phase, the negative pressure applied can be reduced or stopped if necessary.

  For example, the web-like film is separated by providing perforations or openings of any form through the perforation processing device 16. After the perforation point passes through the fixing device 10, the fixing point prevents the film from being fed, while the divided part connected to the intermediate carrier or the printed sheet is further transferred. As a result, the web-like film is shredded at the perforation 15. A similar effect can be obtained by providing the side notches 17 in the web-like film 7. When the web-like film behind the notch portion is gripped by the fixing device 10, the film is cut by the notch.

  The perforation is provided using a non-contact type drilling means such as a pulse laser device or a clock pulse laser device. Fixed or rotating perforated blades are also envisaged. These perforation machines perform mechanical perforation.

  According to the invention, the film 7 is completely cut after passing through the fixing device 10. The cutting is performed by a laser or water jet cutting method, but it can also be performed by mechanical separation cutting or shearing.

  When the web-like film 7 is first provided on an intermediate carrier such as a roller and then applied to a printed sheet, the separating device according to the invention also acts on the intermediate carrier or is integrated on the surface of the intermediate carrier be able to. As an example, a blade, for example, is incorporated on the surface of the press roller 5, whereby the web-like film is cut according to a certain piece length per revolution.

  With the many solutions found by the present invention, the formation of film pieces for laminating or laminating purposes is solved in an excellent manner. These techniques are related to film laminating or laminating in a sheet-fed rotary printing press and have not been applied before.

It is a figure which shows the 1st apparatus for performing a bonding process or a lamination process. It is a figure which shows the 1st aspect for isolate | separating a web-like film. It is a figure which shows the 2nd aspect for isolate | separating a web-like film. It is a figure which shows the 2nd apparatus for performing a bonding process or a lamination process.

Explanation of symbols

1 impression cylinder
2 Passing member 3 Plate cylinder / plate cylinder 4 Blanket cylinder 5 Press roller 6 Smoothing or structure forming roller 7 Web film / bonding film / laminate film 8 Stock roller 9 Dancer roller / dancer roller group / intermediate carrier 10 Fastening device DESCRIPTION OF SYMBOLS 11 Cutting device / Separation device 12 Press gap 13 Roller surface or tensioning material 14 Roller core / body core 15 Perforation opening 16 Perforation processing device 17 Side notch V1 Web-like film surface velocity V2 Press roller surface velocity A Printing device B Finishing device C Paper discharge device

Claims (19)

An apparatus for performing planar laminating or laminating on a printing sheet in a sheet-fed rotary printing machine, particularly a sheet-fed offset printing machine,
The apparatus comprises at least one printing device (A) comprising a plate cylinder (3), a blanket cylinder (4) and an impression cylinder (1);
At least one press roller and a further cylinder, and the press roller and the further cylinder form a press gap (12), and a laminated or laminated film (7) is stuck to the printed sheet in the press gap (12). Finishing processing device (B),
In a device comprising a stock roller (8) and a feeding device for feeding out the web-like film from the stock roller,
A separating device (11) for separating the web-like film for laminating or laminating into individual divided pieces is provided in the finishing device (B),
The separating device (11) cooperates with a securing device (10), which secures the free end of the web-like film at the separating location, whereby the film piece formed by the separating device is The apparatus is characterized in that the film is kept completely connected to the printed sheet and the film is not taken up again after the laminating or laminating process.   The separation device is a perforation processing device (16), which has a desired piece length at a separation location in front of the fixing device (10) of the web-like film (7). A perforation or an opening (15) having an arbitrary shape is provided so that the perforated portion (15) passes through the fixing device (10), and the end of the web-like film is placed on the fixing device (10). ), While the divided part (15) combined with the printed sheet or intermediate carrier further travels, whereby the web-like film (7) is shredded at the perforation point. The apparatus according to claim 1.   The separating device (11) is a notching device, and the notching device has a desired piece length at a separating position before or immediately after the fixing device of the web-like film (7). The web-like film edge is gripped by the fixing device (10), while the web-like film end is gripped by the fixing device (10), and the divided portion (15) combined with the printed sheet or intermediate carrier 2. The device according to claim 1, characterized in that it further travels, whereby the web-like film (7) is shredded at the location provided with the side notches (17).   The web-like film is completely separated by a separating device after the fixing device (10), and the web-like film end portion of the web-like film (7) is fixed by the fixing device (10). The apparatus according to claim 1.   The separating device (11) acts on the web-like film (14), and the web-like film is applied to a press sheet of a finishing device (B) for laminating and laminating printed sheets. 5. The device according to claim 1, wherein the device is provided on an intermediate carrier such as 5) or the impression cylinder (1).   Device according to claim 5, characterized in that the separating device (11) is integrated with the surface of the intermediate carrier such as the press roller (5).   The said separating device (11) is formed in order to completely isolate | separate the said web-like film (7), when releasing | separating the said film part, Either of Claim 5 or Claim 6 characterized by the above-mentioned. The device described.   The said separation apparatus (11) is formed in order to make the said web-like film (7) perforate and to make it isolate | separate in the said perforation location, Claim 6 or Claim 6 and Claim 7 characterized by the above-mentioned. The apparatus of any one of these.   The said separating device (11) is formed in order to isolate | separate by providing a side notch in the said web-like film (7), and then tearing off at the said notch location. 9. Apparatus according to any one of claims 6 and 8.   The separation device (11) has a laser device such as a carbon dioxide laser or a diode laser in order to provide the perforation or the side notch. The device according to item.   9. The separating device (11) as a type of perforation or scoring device is formed as a mechanically acting device and produces markings on the web-like film (7). The apparatus according to claim 9.   The separation device (11) as a type of perforation processing device is characterized in that the web-like film (7) is marked by forming a hole pattern with a perforation cutter or a rotary perforation processing roller. The apparatus according to claim 11.   The separating device (11) as a type of the notch processing device causes the web-like film (7) to be marked, and the side notch (17) in the web-like film (7) is formed by a fixed or rotary cutter. 12. The device according to claim 11, wherein the device is generated.   The web-like film (7) is separated by a non-contact type separation device such as a laser cutting device, a water jet cutting device or an ultrasonic cutting device. The device described in 1.   5. The web-like film (7) is separated by a timing control type or rotary type blade, and the blade preferably has a blade extending obliquely with respect to the cutting line. The device according to claim 7.   A fixing device combined with the device according to any one of claims 1 to 15, wherein the fixing device (10) is a roller or a group of rollers, and the roller is preferably the web-like film ( 7) is driven while being fed, but is stopped at the time of fixing, and the fixing device fixes the free end of the web-like film by tightening.   A fixing device combined with the device according to any one of claims 1 to 15, wherein the fixing device (10) is a suction roller or a group of suction rollers, and the roller is preferably in the form of a web. The fixing device is driven while the film (7) is fed, but is stopped at the time of fixing, and the free end of the web-like film is fixed by a negative pressure by compressed air.   A fixing device combined with the device according to any one of claims 1 to 15, wherein the fixing device (10) is a suction bar or a group of suction bars, the suction bar being the web-like film. A fixing device characterized in that the free end of the fixing device is fixed by a negative pressure by compressed air.   The fixing device according to any one of claims 16 and 17, wherein the negative pressure by the compressed air is applied constantly or only in accordance with a step.

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