JP2016203586A - Composite printing machine having gravure printing device part and composite printing method performing gravure printing as succeeding printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite printing machine and composite printing method which perform gravure printing as succeeding printing different from preceding printing on an inline.SOLUTION: A composite printing machine comprises a gravure printing device part including: a loop unit section 20 which applies a tension to a web conveyed from a preceding printing device section; a printing unit section 23 which has a preceding printing registration mark detection sensor 7 provided on the upstream side of a plate cylinder 10 and a preceding printing and succeeding printing registration mark detection sensor 8 provided on the downstream side; an out feed unit section 22; and a control unit 24 which performs pitch alignment, registration mark alignment and pattern registration. The pitch alignment, registration mark alignment and pattern registration between the preceding printing and the succeeding printing are automatically performed, initial loss in the printing start can be minimized, and registration in the succeeding printing can be accurately performed.SELECTED DRAWING: Figure 1

Description

  The present invention performs a gravure printing as a multi-function printing machine having a gravure printing unit that further prints a reprint on a web that has been pre-printed by a pre-printing unit that performs a pre-printing in advance, and a reprint printing. The present invention relates to a composite printing method, and more particularly, to a composite printing machine and a composite printing method capable of accurately registering pre-printed printing and follow-up printing on a web.

  As a gravure printing machine, there is an infeed unit that initially applies tension to a web such as film or paper, and a plurality of printing units that perform multicolor printing on a web sent from the infeed unit. Are known. This conventional gravure printing machine will be described with reference to FIG.

  A plurality of printing units 33a, 33b, and 33c in a conventional gravure printing machine have substantially the same configuration, and each printing unit 33a, 33b, and 33c includes a printing cylinder 28a, 28b, and 28c, and a printing cylinder 28a. , 28b, and 28c, and the web W is sandwiched between the impression cylinders 29a, 29b, and 29c for printing each color on the web W. Further, when printing is performed on the web W, the plate cylinders 28a, 28b, and 28c are each provided with a register mark on the web W. Also, compensator rolls 30b and 30c that move in the direction of the arrow in FIG. 5 to register the web W are arranged on the upstream side of the plate cylinders 28b and 28c, respectively, and further downstream of the plate cylinders 28b and 28c. Are provided with registration mark detection sensors 31b and 31c for detecting a registration mark attached to the web W, respectively.

  Further, as shown in FIG. 5, the infeed unit portion 32 includes an infeed roll 26 that is driven to rotate, an infeed nip roll 27 that sandwiches the web W between the infeed roll 26, and a downstream side of the infeed roll 26. The dancer roll 25 is provided on the side and is movable in the direction of the arrow in FIG. The web W sent to the infeed unit portion 32 is nipped between the infeed roller roll 26 and the infeed nip roll 27, detects the position of the dancer roll 25, and changes the speed of the infeed roll 26. As a result, the tension is adjusted.

  The conventional gravure printing machine further includes a register controller 37. The register controller 37 controls the compensator rolls 30b and 30c of the printing units 33b and 33c to adjust their positions. The positions of the compensator rolls 30b and 30c by the registration controller 37 are adjusted based on the positions of the registration marks on the web W detected by the registration mark detection sensors 31b and 31c, respectively.

  The operation of the conventional gravure printing machine having such a configuration will be described with reference to FIG.

  First, the plain web W is sent to the infeed unit unit 32, and the web W is tensioned in the infeed unit unit 32. Thereby, the printing pitch of the web W is adjusted according to the magnitude of the tension applied to the web W. Next, the web W is sent from the infeed unit section 32 to the plurality of printing units 33a, 33b, and 33c, and the printing cylinders 29a, 29b, and 29c respectively change the colors of the respective colors with respect to the web W. Printing is performed. At this time, register marks are respectively attached to the web W by the plate cylinders 29a, 29b, and 29c.

  In the printing units 33 b and 33 c, the registration mark attached on the web W is detected by the registration mark detection sensors 31 b and 31 c, and a signal of the position of the registration mark on the web W is sent to the registration controller 37. Then, the compensator rolls 30b and 30c change their positions according to the operation amount calculated based on the information of the position of the register mark on the web W sent from the register controller 37, whereby the plate cylinder 29b, Registration of the web W sent to 29c is performed.

  According to the gravure printing machine shown in FIG. 5 described above, the compensator rolls 30b and 30c of the printing units 33b and 33c for the respective colors perform registration of the web W based on the information on the position of the registration mark on the web W. It is possible to accurately register the web W between the printing units 33a, 33b, and 33c.

JP 2004-66577 A Japanese Patent Laid-Open No. 11-28804

  By using the gravure printing machine shown in FIG. 5, there may be a case where additional printing is further performed on the web W that has been previously printed. The reprint printing is to perform additional printing on a web W such as a film or paper on which a pattern or the like has already been printed. Specifically, for example, a surface coat or The back side is printed.

  However, when performing reprint printing on the web W, the print pitch by the preprint of the web W does not match the print pitch by the reprint, and the gravure printing machine shown in FIG. It is difficult to automatically match the registration with the reprint printing. In such a case, in order to match the registration of the pre-printing printing and the follow-up printing with respect to the web W, the operator reduces the printing speed (conveying speed of the web W) of the gravure printing machine, and the web W is out of registration. The operator must manually adjust the amount of tension applied to the web W by the infeed unit 32 in accordance with the misregistration state to correct the printing pitch of the web W that has been preprinted in advance. I must.

  In particular, when a web that is easy to stretch, such as a biaxially stretched polypropylene film (OPP) or an unstretched polypropylene film (CPP), is used as the web W, the web W is wound once after pre-printing is finished (not shown). The printing pitch changes greatly when winding the sheet. For this reason, when performing additional printing on such a web W, the operator must manually adjust the magnitude of the tension applied to the web W by the infeed unit unit 32 at all times.

  In addition, when performing reprint printing on the web W, as shown in FIG. 5, the plate cylinder 29a of the first printing unit 33a is isolated from the web W, and the first printing unit 33b performs the first color printing. May be printed on the web W. This is because the first printing unit 33a does not have a compensator roll, and the second printing unit 33b has a compensator roll 30b and a registration mark detection sensor 31b. This is because registration can be performed.

  However, when such supplementary printing is performed, the control of the tension of the web W by the infeed unit 32 and the control of the compensator roll 30b of the printing unit 33b interfere with each other, and each control is stably performed. There are things that cannot be done.

  The present invention has been made in consideration of such points, and in the case of performing overprint printing on the web, the web W is once wound around a wound body (not shown) after the preprinting is finished. Without any problem, the print pitch of the web that has been preprinted in-line can be automatically adjusted to match the print pitch of the web with the preprint and the print pitch of the overprint. During the initial registration, printing can be started with the preprinted printing pattern and the printing pattern made on the plate cylinder of the gravure printing machine in advance, and the plate cylinder phase is operated instead of the registration with the conventional compensator roll. To provide a composite printing machine having a gravure printing unit capable of performing registration and a composite printing method having a gravure printing process as additional printing The target.

The composite printing machine having the gravure printing device unit of the present invention includes a preprinting device unit that applies a preprint and a preprint registration mark to the web,
A loop unit for applying tension to the web conveyed from the pre-printing device; and a plate cylinder for performing reprint printing on the web conveyed from the loop unit and applying a reprint registration mark to the web A pre-printed registration mark detection sensor provided on the upstream side of the plate cylinder for detecting the pre-printed registration mark on the web; and the pre-printed registration mark on the web provided on the downstream side of the plate cylinder; A printing unit having a preprinting registration mark detection sensor for detecting each of the overprinting registration marks; an outfeed unit for applying tension to a web conveyed from the printing unit; and the preprinting registration unit The pitch deviation amount is calculated by comparing the pitch of the preprinted registration mark detected by the mark detection sensor with the circumference of the plate cylinder. A first controller for adjusting pitch by adjusting the amount of tension applied to the web by controlling the loop unit and the outfeed unit based on the calculated pitch deviation amount, and the preprinting The position of the preprinted registration mark detected by the registration mark detection sensor is compared with the registration mark position of the plate cylinder to calculate the registration mark deviation amount, and the plate cylinder is calculated based on the calculated registration mark deviation amount. The second control device for adjusting the position of the registration mark of the printing cylinder and the registration mark position of the printing cylinder by controlling the phase angle of the printing medium, and the registration of the preliminary printing detected by the preliminary printing registration mark detection sensor The amount of misregistration between the mark and the overprinting registration mark is calculated, and the pattern registration is performed by controlling the phase angle of the plate cylinder based on the size of the calculated misregistration amount. Cormorant a third control unit, and a gravure printing unit section having a,
It is characterized by comprising.

In addition, the composite printing method for performing gravure printing as the reprint printing of the present invention includes a pre-printing process group for performing pre-printing printing on the web and attaching a pre-printing registration mark,
Pre-printing and applying tension to the web on which the pre-printed registration mark has been applied by the loop unit, and pre-printing the pre-printed printing unit by overprinting the pre-printed registration mark on the web sent from the loop unit. A step of detecting by a registration mark detection sensor, and a reprint for applying a reprint printing and applying a reprint registration mark to the web subjected to the detection step of the preprint registration mark detection sensor by the plate cylinder of the reprint printing unit. The preprint registration mark and the overprint registration mark on the web sent from the plate cylinder are detected by the preprint overprint registration mark detection sensor of the overprinting printing unit, respectively. Preprinted additional printing registration mark detection process to be performed and sent from the additional printing unit The step of applying tension to the web by the outfeed unit, and comparing the pitch of the preprinted register mark detected by the preprinted register mark detection sensor with the circumferential length of the plate cylinder, Pitch adjustment for calculating the size and adjusting the pitch by adjusting the amount of tension applied to the web by controlling the loop unit portion and the outfeed unit portion based on the calculated amount of pitch deviation amount Comparing the position of the preprinted registration mark detected by the preprinted registration mark detection sensor with the registration mark position of the plate cylinder, calculating a registration mark deviation amount, and based on the calculated magnitude of deviation A plate cylinder register mark alignment step for controlling the phase angle of the plate cylinder to align the preprint register mark and the examination mark position of the plate cylinder, and the preprint Calculate the amount of misregistration between the preprinted register mark and the overprinted register mark detected by the reprint register mark detection sensor, and control the phase angle of the plate cylinder based on the size of the calculated misregistration amount. A gravure printing process group having a pattern matching process for registering a pattern, and a gravure printing process group.

  A composite printing machine having a gravure printing apparatus according to the present invention includes a preprinting apparatus for applying a preprint and a preprinted registration mark to a web, and a gravure printing apparatus. In addition, the composite printing method for performing gravure printing as follow-up printing according to the present invention includes a pre-printing process group and a gravure printing process group for performing pre-printing printing on a web and attaching a pre-printing registration mark.

  Here, the preprinting device unit and the preprinting process group mean printing apparatuses and printing process groups such as offset printing other than gravure printing, letterpress printing, ink jet printing, and electrophotographic printing. Here, devices and components such as a loop unit portion and a registration mark detection sensor constituting a gravure printing device portion and a gravure printing process group are conventionally known.

  According to the composite printing machine and the composite printing method having the gravure printing apparatus portion of the present invention, the pitch of the preprinted register mark on the web W and the plate cylinder when the overprinted web is subjected to the overprint printing. The amount of pitch applied to the web by controlling the loop unit and the outfeed unit based on the calculated amount of pitch deviation The pitch can be adjusted by adjusting.

  In addition, the position of the preprinted registration mark is compared with the registration mark position of the plate cylinder, and the phase angle of the plate cylinder is controlled based on the amount of registration mark misalignment to automatically align the registration mark of the plate cylinder. Can be adjusted.

  Further, the pattern alignment is performed by controlling the phase angle of the plate cylinder for the deviation between the printed pattern on the web printed by the preprint and the pattern made on the plate cylinder. For this reason, the printing pitch of the web that has been pre-printed in advance and the printing pitch alignment by reprinting, plate cylinder register mark alignment, and the pattern printed by preprinting and the pattern printed by reprinting printing Pattern matching can be matched in advance.

  In the composite printing machine having the gravure printing apparatus part of the present invention, a tension unit having a pair of rolls provided in the loop unit part and sandwiching a web that has been pre-printed and pre-printed with registration marks is provided. It is preferable to provide two sets. According to such a composite printing machine, a tension unit installed on the upstream side of the loop unit unit controls and conveys the tension applied to the web by the preprinted printing machine in an appropriate state, and the downstream of the loop unit unit. The tension unit installed on the side can give the web tension necessary for the printing unit to perform appropriate printing.

  Further, the control of the tension applied to the web by the tension unit installed on the downstream side of the loop unit portion and the registration control by the plate cylinder phase for the web are separated. Thus, interference between the tension control by the loop unit and the registration control by the plate cylinder phase can be suppressed, and each control can be performed stably.

  A first control device of a composite printing press having a gravure printing device according to the present invention performs control to match the pitch of pre-printing printing and the pitch of follow-up printing. The first control device compares the pitch of the preprinted register mark detected by the preprinted register mark detection sensor with the circumferential length of the plate cylinder to calculate the magnitude of the pitch shift amount, and the calculated pitch shift amount. The loop unit and the outfeed unit are controlled on the basis of the size of the web to adjust the size of the tension applied to the web to adjust the pitch.

  When the magnitude of the deviation is larger than a preset set deviation amount, the tension applied to the web is controlled by controlling the loop unit part and the outfeed unit part with the correction value calculated by the PID calculation based on the magnitude of the deviation. It is preferable to adjust the size.

  Usually, the size of the registration mark position deviation in the steady state of the gravure printing machine fluctuates at a certain period. This periodicity and amplitude vary depending on the configuration and printing state of the gravure printing machine. If the correction amount of the loop unit portion and the outfeed portion is calculated on the basis of the size of the registration mark position deviation for each rotation of the plate cylinder without using PID calculation, the registration mark position deviation is periodically calculated. Such fluctuations may become periodic fluctuations in the correction amount of the loop unit part and the outfeed part as they are, and there is a possibility that the deviation between the position of the preprinted registration mark and the position of the overprinting registration mark will increase.

  Here, according to the gravure printing apparatus portion of the present invention, the correction amount of the loop unit portion and the outfeed portion is calculated using the value of the size of the registration mark position deviation calculated by the PID calculation. Even when the size of the registration mark position deviation fluctuates at a constant period, the tension applied to the web by the loop unit portion and the outfeed portion can be adjusted stably.

  The second control device of the composite printing press having the gravure printing device according to the present invention is a control device for aligning the registration mark position of the preprint registration mark and the registration mark position of the plate cylinder. Specifically, the amount of registration mark deviation is calculated by comparing the position of the pre-printed registration mark detected by the pre-printed registration mark detection sensor with the position of the registration mark on the plate cylinder, and calculating the registration mark deviation amount. The registration angle of the plate cylinder is aligned by controlling the phase angle of the plate cylinder based on the size of the plate cylinder.

  The third control device of the composite printing press having the gravure printing device unit of the present invention is a control device that matches the pattern of pre-printing printing with the design of follow-up printing. That is, the amount of misregistration between the preprinted registration mark and the overprinting registration mark detected by the preprinted overprint registration mark detection sensor is calculated, and the phase of the plate cylinder is calculated based on the magnitude of the calculated misregistration amount. Control the angle and register the pattern.

  The shift between the printed pattern on the web printed by pre-printing and the pattern made on the plate cylinder is adjusted in advance by manipulating the phase of the plate cylinder. For this reason, the print pitch of the web that has been pre-printed in advance, and the print pitch by the web pre-print and the print pitch by the reprint, and the pattern printed by the pre-print are automatically adjusted. The pattern to be printed by reprint printing can be matched in advance.

  According to the composite printing machine and the composite printing method of the present invention, when performing reprint printing on a preprinted web, the pitch of preprint printing on the web W is matched with the pitch of reprint printing. Comparing the pitch of the pre-printed registration mark detected by the pre-printed registration mark detection sensor and the circumference of the plate cylinder to calculate the amount of pitch deviation, and based on the calculated amount of pitch deviation It is possible to adjust the pitch by automatically adjusting the magnitude of the tension applied to the web by controlling the loop unit portion and the outfeed unit portion.

  Furthermore, the amount of registration mark deviation is calculated by comparing the position of the pre-printed registration mark detected by the pre-printed registration mark detection sensor with the position of the registration mark on the plate cylinder, and calculating the amount of registration mark deviation. Therefore, the registration angle of the printing cylinder can be automatically adjusted by controlling the phase angle of the printing cylinder.

  Further, the shift between the printed pattern on the web printed by preprinting and the pattern made on the plate cylinder is automatically adjusted in advance by operating the phase of the plate cylinder.

  Thus, according to the composite printing machine and composite printing method of the present invention of the present invention, the printing pitch of the web that has been pre-printed in advance, the printing pitch by reprinting, and the position and plate of the pre-printed registration mark Align the registration mark at the registration mark position on the cylinder, and the pattern printed by pre-printing and the pattern printed by follow-up printing can be matched in advance, minimizing the initial loss at the start of printing. In addition, it is possible to accurately match the register in the reprint printing.

It is explanatory drawing which shows the structure of the gravure printing apparatus part which comprises the composite printing machine of this embodiment. It is a block diagram which shows the control method by the 1st control apparatus of the gravure printing apparatus part of FIG. It is a block diagram which shows the control method by the 2nd control apparatus of the gravure printing apparatus part of FIG. It is a block diagram which shows the control method by the 3rd control apparatus of the gravure printing apparatus part of FIG. It is explanatory drawing which shows the structure of the conventional gravure printing machine.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram illustrating a configuration of a gravure printing apparatus unit of a composite printing machine according to the present embodiment, and FIGS. 2 to 4 are block diagrams illustrating a control method by a control device of the gravure printing apparatus unit.

  The gravure printing apparatus unit shown in FIG. 1 performs further overprinting on a web W such as a film or paper that has been preprinted and previously provided with a preprinted registration mark. The gravure printing apparatus unit includes a loop unit unit 20, a printing unit unit 23, an outfeed unit 22, and a control device 24.

  The loop unit unit 20 includes an upstream tension unit 20a that applies a tension required by the printing machine in the preceding process to the web W sent in the direction of the arrow in FIG. It has a downstream tension unit 20b that applies the tension required by the unit section 23.

  The upstream tension unit 20a is provided on the upstream side of the feed roll 2 and the feed nip roll 3 that sandwiches the web W between the feed roll 2 that is rotationally driven, and is movable in the direction of the arrow in FIG. And dancer roll 1.

  The downstream tension unit 20b is provided on the upstream side of the feed roll 5 and the feed nip roll 6 that holds the web W between the feed roll 5 and the feed roll 5, and is movable in the direction of the arrow in FIG. And a dancer roll 4.

  Drive motors 11 and 12 for rotating the feed rolls 2 and 5 are connected to the feed rolls 2 and 5. The dancer rollers 1 and 4 are connected to an air cylinder (not shown) that moves the dancer rollers 1 and 4 in the direction of the arrow in FIG.

  The outfeed unit 22 gives a tension required by the printing unit unit 23 that performs reprint printing on the web W. The outfeed unit 22 is provided on the upstream side of the feed roll 17, the feed nip roll 18 that sandwiches the web W between the feed roll 17 that is rotationally driven, and the feed roll 17. 1 and a take-up dancer roll 19 which is provided on the downstream side of the feed roll 17 and is movable in the direction of the arrow in FIG.

  A drive motor 14 that rotates the feed roll 17 is connected to the feed roll 17. The dancer roll 17 and the take-up dancer roll 19 are connected to an air cylinder (not shown) that moves the dancer roll 17 and the take-up dancer roll 19 in the direction of the arrow in FIG.

  The printing unit section 23 includes a printing cylinder 10 and a pressure cylinder 9 that holds the web W between the printing cylinder 10 and performs printing of each color. A reprint register mark is added.

  The plate cylinder 10 is driven to rotate in synchronization with the line speed of the web W by a drive motor 15. The drive of the drive motor 15 is controlled based on a signal sent from a line controller of the control device 24 described later.

  The plate cylinder 10 of the printing unit unit 23 receives a registration error signal from a control device 24 to be described later, and the plate cylinder phase operation device sends a signal indicating the operation amount of the phase angle of the plate cylinder 10 to control its driving. Is done. The web W sent to the plate cylinder 10 is registered by changing the plate cylinder phase angle.

  The printing unit 23 is further provided on the upstream side of the plate cylinder 10, provided on the downstream side of the plate cylinder 10 with a preprint registration mark detection sensor 7 for detecting a preprint registration mark previously attached to the web W, A preprint registration mark detection sensor 8 for detecting a preprint registration mark previously attached to the web W and a reprint registration mark attached by the plate cylinder 10 is provided.

  In the printing unit section, it is also possible to arrange a plurality of units in correspondence with multicolor printing (not shown) as in the case of a conventional gravure printing machine.

  The control device 24 controls the loop unit unit 20, the printing unit unit 23, the outfeed unit 22, and the winding device 21. The control device 24 includes: drive motors 11 and 12 for the loop unit unit 20; plate cylinder drive motor 15 for the printing unit unit 23; preprinted and postprinted register mark detection sensor 8; preprinted register mark detection sensor 7; The drive motor 14 is connected.

  The control device 24 controls the phase angle of the plate cylinder drive motor 15 based on the signals of the positions of the preprinted register mark and the postprinted register mark on the web W detected by the preprinted and postprinted register mark detection sensor 8. It has become. The control method by the control device 24 will be described in detail later.

  Next, the operation of the present embodiment having such a configuration will be described. First, before sending the web W to the gravure printing apparatus unit shown in FIG. 1, pre-printing is performed on the web by the pre-printing apparatus unit in the previous process. At this time, a preprinted register mark is attached to the web W.

  Next, when the web W that has been pre-printed in the pre-printing device section in the previous process is conveyed to the gravure printing apparatus section shown in FIG. 1, the web W is first sent to the loop unit section 20. The web W is clamped between the feed roll 2 and the feed nip roll 3 in the tension unit 20a on the upstream side of the loop unit portion 20, and the position of the dancer roll 1 is detected and the speed of the feed roll 2 is changed. As a result, the tension is changed. Then, a tension necessary for printing is applied to the web W by the pre-process printing press.

  Next, the web W is sandwiched between the feed roll 5 and the feed nip roll 6 in the tension unit 20b on the downstream side of the loop unit portion 20, and the position of the dancer roll 4 is detected, and the speed of the feed roll 5 is increased. The tension is changed by changing. Here, the printing pitch of the web W on which the preprint printing has been performed is adjusted according to the magnitude of the tension applied to the web W. At this time, the magnitude of the tension applied to the web W is determined by the rotational speed of the feed roll 5 of the downstream tension unit 20 b and the position of the dance roll 4, and the rotational speed of the feed roll 5 and the dancer roll 4. Is adjusted by the control device 24 as will be described later.

  As shown in FIG. 1, the web W sent from the loop unit 20 is then sent to the plate cylinder 10 of the printing unit 23 without passing through a mechanism that causes disturbance in the tension control on the web W such as a dancer roll and a compensator roll. It is done. As a result, the control of the tension applied to the web W by the loop unit unit 20 and the register control by the phase operation of the plate cylinder 10 with respect to the web W described later are separated, and the tension control by the loop unit unit 20 and the plate cylinder are separated. There is no interference with the register control by 10 phase operations.

  The web W sent to the printing unit 23 is subjected to plate cylinder registration mark alignment that matches the preprint registration mark and the examination mark position of the plate cylinder by changing the phase angle of the plate cylinder 10. This plate cylinder register mark alignment is performed by the control device 24 controlling the drive of the plate cylinder drive motor 15 and changing the phase angle of the plate cylinder 10 freely as will be described later.

  The web W is sent to the plate cylinder 10 of the printing unit unit 23, and the web W is sandwiched between the plate cylinder 10 and the impression cylinder 9, and in this way, reprint printing is performed on the web W. . At this time, a reprint register mark is attached to the web W by the plate cylinder 10. Next, the preprinted registration mark detection sensor 8 detects the preprinted registration mark and the overprinting registration mark on the web W sent from the plate cylinder 10, and the signal of the position of each registration mark is controlled by the control device. To 24 register controllers 40.

  The web W discharged from the printing unit unit 23 is then sent to a second color printing unit unit (not shown) when multi-color printing is required, and the second color printing unit unit (not shown). For example, printing of a different color from the printing unit 23 of the first color is performed. The operation of the second color printing unit (not shown) on the web W is substantially the same as the operation of the first color printing unit 23 described above.

  Next, the control method by the control device 24 will be further described in detail with reference to FIG. 1 and FIGS. As shown in FIG. 1, the control device 24 includes a register controller 40, a plate cylinder phase control device 41 connected to the register controller 40, a line controller 42, and a pitch calculation device 43. Further, the plate cylinder phase control device 41, the line controller 42, and the pitch calculation device 43 are integrated into one CPU device, and their functions are processed in parallel.

  Here, a control device including the pitch calculation device 43 and the line controller 42 is referred to as a first control device, and a control device including the pitch calculation device 43 and the plate cylinder phase control device 41 is referred to as a second control device. A control device using the plate cylinder phase control device 41 will be described as a third control device.

  The control method by the first controller is as follows (see FIG. 2).

  When the web W that has been pre-printed by the pre-process printing press is conveyed to the printing unit 23 shown in FIG. 1, the pitch calculation device 43 is pre-registered on the upstream side of the plate cylinder 10. The amount B of deviation between the mark pitch of the preprinted registration mark detected by the mark detection sensor 7 and the circumferential length of the plate cylinder 10 is calculated for each rotation of the plate cylinder 10.

  Further, the pitch calculation device 43 performs PID calculation based on the value of the magnitude B of the deviation, and when the pitch offset amount is larger than a preset deviation amount, the pitch calculation device 43 is arranged on the downstream side of the loop unit unit 20 so as to decrease. The tension correction values of the dancer roll 4 of the tension unit 20b and the dancer roll 16 of the outfeed unit 22 are calculated. Then, a tension correction value signal calculated by the pitch calculation device 43 is sent to the line controller 42.

  Based on the tension correction values of the dancer roll 4 of the tension unit section 20b on the downstream side of the loop unit section 20 and the dancer roll 16 of the outfeed section 22 sent from the pitch calculation device 43, the line controller 42 The tension setting values of the dancer rolls 4 and 16 set in advance are changed. Then, the line controller 42 changes the air cylinder pressure of the air cylinder connected to the dancer rolls 4 and 16 via the electropneumatic converter based on the changed tension setting value of each dancer roll. The tension of the tension unit portion 20b on the downstream side of the loop unit portion 20 and the outfeed portion 22 by the line controller 42 is controlled by the pressure of the air cylinder connected to the dancer rolls 4 and 16 and the tension applied to the roll by the web W. It is performed by utilizing the movement of the dancer rolls 4 and 16 due to the balance. That is, using a known relationship between tension and air cylinder pressure, air is supplied to the air cylinder connected to the dancer rolls 4 and 16 so that the air cylinder pressure corresponds to the desired tension. When the pressing force of the air cylinder and the tension applied to the roll by the web W are the same, the dancer rolls 4 and 16 do not move. On the other hand, if there is an imbalance of these forces, the positions of the dancer rolls 4 and 16 will change. The speeds of the feed roll 5 of the tension unit section 20b on the downstream side of the loop unit section 20 and the feed roll 18 of the outfeed section 22 are changed so that the position of the dancer rolls 4 and 16 becomes a desired position (usually an intermediate position). Control the tension. In this manner, the line controller 42 adjusts the magnitude of the tension applied to the web W by the tension unit portion 20b and the outfeed portion 22 on the downstream side of the loop unit portion 20.

  During this time, the line controller 42 controls the drive motors 11 and 13 and the plate cylinder drive motor 15 of each unit, the tension unit 20a on the upstream side of the loop unit unit 20, the plate cylinder 10 of the printing unit unit 23, and the winding unit. The take-up drive motor 13 of the take-up device 21 is rotationally driven in synchronization.

  The control method by the second control device is as follows (see FIG. 3).

  When the web W that has been pre-printed by the pre-process printing press is conveyed to the printing unit 23 shown in FIG. 1, the pitch calculation device 43 is pre-registered on the upstream side of the plate cylinder 10. The amount of deviation between the preprinted registration mark position detected by the mark detection sensor 7 and the registration mark position made on the plate cylinder 10 is calculated and calculated during traveling. The position where the registration mark is made on the plate cylinder 10 is registered in advance when the plate cylinder 10 is mounted on the printing unit 23, and the pitch calculation device 43 is rotating. However, the position of the registration mark made on the plate cylinder 10 can always be monitored.

  The deviation amount between the pre-printed registration mark position calculated by the pitch calculation device 43 and the registration mark position made on the plate cylinder 10 is sent to the plate cylinder phase control device 41. The plate cylinder phase device 41 starts line running. Then, after the registration mark on which the web W is attached by pre-printing passes in front of the pre-printing registration mark detection sensor 7 installed on the upstream side of the plate cylinder 10, the phase angle of the plate cylinder drive motor 15 is manipulated. Prepare in advance with the position of the pre-printed registration mark and the position of the registration mark for the additional printing (this process is called initial registration). No. 23 performs gravure printing by sandwiching the plate cylinder 10 and the impression cylinder 9. The above-described printing start method makes it possible to minimize the initial loss at the start of gravure printing.

  The control method by the third control device is as follows (see FIG. 4).

  As shown in FIG. 1, the register controller 40 is connected to the register mark detection sensor 8, and the signal of the position of the preprinted register mark on the web W detected by the register mark detection sensor 8 and the overprint register mark are displayed. A position signal is sent to the register controller 40. In the registration controller 40, the magnitude A of the deviation between the position of the preprinted registration mark on the web W and the position of the additional printing registration mark attached on the web by the plate cylinder 10 is calculated.

  Next, the registration controller 40 transfers the registration deviation to the plate cylinder phase control device 41. The plate cylinder phase control device 41 operates the phase angle of the plate cylinder 10 so as to reduce the magnitude A of the deviation based on the amount of registration deviation transferred from the registration controller 40. In order to perform multicolor printing, when the printing unit units are arranged side by side behind the printing unit unit 23, the position of the preprinted registration mark and the plate cylinder 10 are attached when adjusting the phase angle. Instead of using the magnitude A of the deviation from the position of the reprint registration mark, the position of the reprint registration mark attached to the plate cylinder 10 on the web W and the printing unit installed behind the printing unit 23 are used. Alternatively, the position of the registration mark attached by the plate cylinder may be detected by a registration mark detection sensor, and the operation amount of the plate cylinder phase may be calculated based on the magnitude of the positional deviation between the two.

  According to the gravure printing machine and the gravure printing method of the present embodiment, when the overprint printing is performed on the web as described above, the first control register mark position and the overprint on the web W are performed by the first controller. PID calculation is performed based on the amount of deviation from the registration mark position, and when the pitch offset amount is larger than a preset deviation amount, the tension unit portion 20b on the downstream side of the loop unit portion 20 decreases so as to decrease. The tension applied to the web W by the dancer roll 4 and the dancer roll 16 of the outfeed unit 22 is adjusted. Usually, the size of the registration mark position deviation in the steady state of the gravure printing machine fluctuates at a certain period. This periodicity and amplitude vary depending on the configuration and printing state of the gravure printing machine. Correction of the dancer roll 4 of the tension unit section 20b on the downstream side of the loop unit section 20 and the dancer roll 16 of the outfeed section 22 based on the size of the registration mark position shift for each rotation of the plate cylinder without using PID calculation. When the amount is calculated each time, the periodic variation of the registration mark position shift is directly the period of the correction amount of the dancer roll 4 of the tension unit 20b on the downstream side of the loop unit 20 and the dancer roll 16 of the outfeed unit 22. There is a risk that the difference between the position of the preprinted registration mark and the position of the additional printing registration mark will increase. Here, according to the gravure printing machine of the present embodiment, the dancer roll 4 of the tension unit portion 20b on the downstream side of the loop unit portion 20 and the size of the registration mark position shift obtained by the PID calculation Since the amount of correction given to the web W by the dancer roll 16 of the outfeed unit 22 is calculated, even if the position deviation of the register mark fluctuates at a constant period, the downstream side of the loop unit unit 20 The magnitude of tension applied to the web W by the dancer roll 4 of the tension unit 20b and the dancer roll 16 of the outfeed unit 22 can be adjusted stably.

  In addition, two types of tension units 20a and 20b are provided in the loop unit unit 20, and the web W sent from the loop unit unit 20 has a mechanism that causes disturbance in the tension control for the web W such as a dancer roll and a compensator roll. It is conveyed to the plate cylinder 10 of the printing unit unit 23 without intervention. Thereby, the control of the tension applied to the web W and the registration control by the phase operation of the plate cylinder 10 with respect to the web W are separated. Thus, interference between the tension control by the loop unit 20 and the register control by the phase operation of the plate cylinder 10 can be suppressed, and each control can be stably performed.

  Further, based on the input signal from the preprint registration mark detection sensor 7 installed on the upstream side of the plate cylinder 10 by the second control device, the phase angle of the plate cylinder drive motor 15 is operated to follow the preprint registration mark. A state in which the position of the registration mark for printing is aligned is prepared in advance, and the printing unit 23 sandwiches the plate cylinder 10 and the impression cylinder 9 from the state where the registration mark for pre-printing coincides with the registration mark for overprinting. To start. For this reason, the initial loss can be minimized when the supplementary printing is started.

  Further, the phase angle of the plate cylinder 10 is adjusted by the third control device based on the magnitude of the deviation of the mark-to-mark pitch between the preprint registration mark position and the overprint registration mark position on the web W. For this reason, it is possible to automatically adjust the printing pitch of the web W on which the pre-printing has been performed in advance, so that the printing pitch by the pre-printing of the web W matches the printing pitch by the additional printing.

DESCRIPTION OF SYMBOLS 1 Dancer roll 2 Feed roll 3 Feed nip roll 4 Dancer roll 5 Feed roll 6 Feed nip roll 7 Detection sensor 8 Detection sensor 9 Impression cylinder 10 Plate cylinder 11 Feed roll drive motor 12 Feed roll drive motor 13 Winding device drive motor 14 Feed roll drive Motor 15 Plate cylinder drive motor 16 Dancer roll 17 Feed roll 18 Feed nip roll 19 Winding dancer roll 20 Loop unit 20a, 20b Tension unit 21 Winding device 22 Outfeed unit 23 Printing unit 24 Control device 25 Infeed dancer roll 26 Infeed roll 27 Infeed nip roll 28a, 28b, 28c Plate cylinder 29a, 29b, 29c Impression cylinder 30b, 30c Compensator Roll 31b, 31c Registration mark detection sensor 32 Infeed unit 33a, 33b, 33c Printing unit 34 Infeed roll drive motor 35 Plate cylinder drive motor 36 Line controller 37 Register controller 40 Register controller 41 Plate cylinder phase controller 42 Line controller 43 Pitch calculation device

Claims (4)

It has a pre-printing device that applies pre-printing and pre-printing registration marks to the web,
A loop unit for applying tension to the web conveyed from the pre-printing device;
A plate cylinder for performing reprint printing on the web conveyed from the loop unit and attaching a reprint registration mark to the web, and detecting the preprint registration mark on the web provided upstream of the plate cylinder A pre-printed registration mark detection sensor for performing printing, and a pre-printed registration mark detection sensor for detecting the pre-printing registration mark and the additional printing registration mark on the web provided on the downstream side of the plate cylinder The unit section,
An outfeed unit that applies tension to the web conveyed from the printing unit;
The pitch deviation amount is calculated by comparing the pitch of the preprint registration mark detected by the preprint registration mark detection sensor with the circumferential length of the plate cylinder, and the calculated pitch deviation amount is obtained. A first controller for adjusting the pitch by adjusting the amount of tension applied to the web by controlling the loop unit portion and the outfeed unit portion based on,
The position of the pre-printed register mark detected by the pre-printed register mark detection sensor is compared with the register mark position of the plate cylinder to calculate the register mark misalignment amount, and based on the calculated register mark misalignment amount A second control device for controlling the phase angle of the plate cylinder to align the position of the preprinted registration mark and the examination mark of the plate cylinder,
The amount of misregistration between the preprinted registration mark and the overprinting registration mark detected by the preprinted overprinting registration mark detection sensor is calculated, and the phase of the plate cylinder is calculated based on the amount of deviation of the calculated registration deviation amount. A third control device for registering the pattern by controlling the angle;
A gravure printing device unit comprising:
A composite printing machine having a gravure printing unit.   2. The composite printing press having a gravure printing device according to claim 1, wherein the loop unit includes two types of tension units each having a pair of rolls that sandwich a web.   The first control device calculates the amount of pitch deviation between the position of the preprinted registration mark and the circumferential length of the plate cylinder, and the magnitude of the pitch deviation amount is determined based on a preset pitch deviation amount. The loop unit portion and the outfeed unit portion are controlled based on the correction value calculated by the PID calculation based on the magnitude of the deviation, and the tension applied to the web by the loop unit portion and the outfeed unit portion. The composite printing press having a gravure printing device according to claim 1 or 2, wherein the size of the printing press is adjusted. A pre-printing process group for pre-printing printing on the web and attaching a pre-print register mark,
A step of applying tension by a loop unit to a web on which preprinted printing and a preprinted registration mark are applied;
A step of detecting a preprinted register mark on the web sent from the loop unit part by a preprinted register mark detection sensor of the overprinting printing unit part;
A reprinting step of performing a reprint printing with a plate cylinder of the reprint printing unit unit on the web that has undergone the detection process by the preprint registration mark detection sensor and attaching a reprint registration mark;
A pre-printed overprint registration mark detection step of detecting a preprint registration mark and a overprint registration mark on the web sent from the plate cylinder by a preprint overprint registration mark detection sensor of the overprinting printing unit, respectively;
Applying tension to the web sent from the reprint printing unit by an outfeed unit;
The pitch deviation amount is calculated by comparing the pitch of the preprint registration mark detected by the preprint registration mark detection sensor with the circumferential length of the plate cylinder, and the magnitude of the calculated pitch deviation amount is calculated. A pitch matching step for adjusting the pitch by adjusting the magnitude of the tension applied to the web by controlling the loop unit portion and the outfeed unit portion based on
The position of the pre-printed register mark detected by the pre-printed register mark detection sensor is compared with the register mark position of the plate cylinder to calculate the register mark displacement amount, and based on the calculated displacement size, the plate cylinder A plate cylinder register mark alignment process that controls the phase angle of the preprint register mark and aligns the examination mark position of the plate cylinder;
The amount of misregistration between the preprinted registration mark and the overprinting registration mark detected by the preprinted overprinting registration mark detection sensor is calculated, and the phase angle of the plate cylinder is calculated based on the calculated amount of registration deviation. A pattern matching process to control and register the pattern;
A composite printing method for performing gravure printing as follow-up printing, comprising:

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