EP2727869A1 - Dispositif et procédé destinés à plier des feuilles imprimées - Google Patents

Dispositif et procédé destinés à plier des feuilles imprimées Download PDF

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Publication number
EP2727869A1
EP2727869A1 EP13190216.5A EP13190216A EP2727869A1 EP 2727869 A1 EP2727869 A1 EP 2727869A1 EP 13190216 A EP13190216 A EP 13190216A EP 2727869 A1 EP2727869 A1 EP 2727869A1
Authority
EP
European Patent Office
Prior art keywords
compressed air
folding
sheet
outlet openings
control element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13190216.5A
Other languages
German (de)
English (en)
Other versions
EP2727869B8 (fr
EP2727869B1 (fr
Inventor
Peter Braschoss
Hanspeter Duss
Christoph Gysin
Martin Thurnherr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mueller Martini Holding AG
Original Assignee
Mueller Martini Holding AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mueller Martini Holding AG filed Critical Mueller Martini Holding AG
Publication of EP2727869A1 publication Critical patent/EP2727869A1/fr
Application granted granted Critical
Publication of EP2727869B1 publication Critical patent/EP2727869B1/fr
Publication of EP2727869B8 publication Critical patent/EP2727869B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/52—Folding sheets, blanks or webs by reciprocating or oscillating members, e.g. fingers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/02—Folding limp material without application of pressure to define or form crease lines
    • B65H45/04—Folding sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast

Definitions

  • the invention relates to a device and a method for folding printed sheets according to the preamble of claim 1 or according to the preamble of claim 11.
  • printed sheets which have two or more printed pages
  • these sheets are bent at least once on a prepared by perforation or creasing or on an unprepared fold line according to a predetermined folding scheme under pressure sharp edged, i. folded to the format of the later printed product.
  • both transverse and longitudinal folding devices are used, which can be arranged simply, repeatedly and also combined in a folding machine. The folding takes place by means of a so-called pocket and / or Schwertfalztexs. Regardless of the type of device used and the corresponding method, the accuracy of each individual fold is decisive for the quality of the printed product to be produced.
  • the folding blade presses against the folding line, ie against an imaginary straight line of the sheet to which it is to be folded, and thus guides the sheet through the recess of the folding table to the folding rollers.
  • the signature is then picked up by the folding rollers and drawn into the fold gap formed between them, thereby bent over at the fold line and pressed.
  • the thus folded sheet is then removed by means of the folding rollers down.
  • folding machines with a arranged below the folding table folding blade and arranged above the folding table folding rollers are known in which the folded sheet is removed each upward.
  • a mechanical folding blade requires very precise and elaborate geometric adjustments. Likewise, the length of the folding blade for the purpose of adaptation to the format of the sheet is variable constructable only with great effort. In addition, a mechanical folding blade requires a relatively large space and yet has poor accessibility. Due to the required high folding performance, the folding blade must be moved as quickly as possible and therefore applies to the printed sheet at a relatively high speed. In order not to get in contact with the folding rollers and to release the space on the folding table as quickly as possible for the supply of the next sheet, the folding blade must already in good time before reaching the folding rollers perform a previous lowering opposite movement. Therefore, the sheet to be folded is in an undefined motion just before being picked up by the folding rollers.
  • the printed sheet can thus deviate from the intended trajectory and may not be detected by the folding rollers. Therefore, there is a permanent congestion driving sequentially supplied sheet.
  • compared to their folding position shifted sheet can be folded only with greater technical effort to the intended fold line.
  • so-called dog-ears ie the turning over of the ends of the sheet at high speeds hardly manageable, because corresponding guide elements are only limited usable due to the space required by the mechanical sword. Accordingly, when using a mechanical sword, the risk of impairing the quality of the subsequent printed product may be reduced but not eliminated with a high technical outlay.
  • rotating folding blade of the folding time can be hardly varied because of the inertia of the device.
  • the DE10238502 A1 discloses a method suitable for transverse or L Lucassfalzen each of a sheet and a device, wherein instead of a mechanical pneumatic sword, ie a compressed air device consisting of a tube with preferably downwardly directed outlet openings is used.
  • the printing sheet is fed to this device in a guide plane and thereby provided in a folding position in which its intended fold line is located below the outlet openings of the compressed air device.
  • receives the compressed air device via a control unit a trigger pulse for a directed to the folding line of the sheet, strong compressed air blast, for example, a few hundred bar.
  • the printed sheet is guided at its folding line into the folding gap located between the folding rollers. Since in this way an undefined trajectory of the sheet is excluded, the risk of deterioration of the quality of the subsequent printed product compared to a solution with a mechanical sword can be reduced.
  • a transverse fold is also produced immediately before a longitudinal fold, a gap between the folded printed sheets, which corresponds to the length of the respective printed sheet, is produced by the transverse folding both in the case of mechanical and pneumatic swords.
  • the relatively stable fold edge of the transverse fold can not be spent in an advantageous for transfer to the following machine defined fixed position, because the folded edge of a subsequent, shorter sheet are otherwise already in the rebate of the sword and thus the sole folding of the previous print sheet would be impossible.
  • a complex, adjustable stop is required.
  • both the lowered mechanical sword and the compressed air stream of the pneumatic sword directed from the compressed air device onto the printed product to be folded obstructs an immediate supply of the next printed sheet and thus a faster production.
  • the object of the invention is therefore to provide a device and a method for folding sheets, which allow for high folding quality and performance, a simple and cost-effective adaptation to different formats of successive sheets and an automation of the folding process and therefore also for further processing of means Digital presses sequentially printed sheet are suitable.
  • the compressed air device of the device according to the invention has at least two segments which each have at least one outlet opening provided with a cross-sectional area.
  • Each segment is connected to the compressed air source and the control unit, has at least one control element and is designed separately controllable with compressed air.
  • At least two regions of the device arranged side by side or one behind the other in the feed direction can advantageously be subjected to compressed air individually. Therefore, it is possible to supply only the segment or the segments with compressed air, which correspond to the format of the printed sheet provided.
  • only one segment or part of the segments can be supplied with compressed air, so that the compressed-air impact on the printed sheet provided takes place only from the outlet openings of this one segment or part of the segments.
  • at least two printed sheets provided in succession can advantageously be treated both identically and differently according to their format.
  • the compressed air impact of at least one segment, multiple segments or the entire compressed air device can be dosed easily and quickly according to the format of the sheet provided in the respective folding position and both good folding quality over the entire spectrum for folding printed sheet also a high folding performance can be achieved.
  • the control unit triggers a blast of compressed air from the at least one outlet opening of at least one of the segments of the compressed air device onto the printed sheet provided.
  • the compressed air surge of the compressed air device can be easily and quickly metered according to the format of a sheet currently being folded provided in the folding position and both good folding quality and high folding performance can be achieved over the entire spectrum for folding printed sheets.
  • the device according to the invention for providing the printing sheet either has a first or second feeding direction substantially perpendicular or substantially parallel to the axes of rotation of the folding rolls, the segments of the compressed air means being arranged side by side in the first feeding direction or in succession in the second feeding direction ,
  • the printed sheet may advantageously be provided either in a first feed direction substantially parallel to the axes of rotation of the folding rollers and acted upon by the compressed air blast transversely to the first feed direction or in a second feed direction extending substantially at right angles to the axes of rotation of the folding rolls and along the second Feeding direction with the Compressed air shock are applied. Accordingly, the sheet is either transversely or longitudinally folded.
  • At least one first guide element for the printed sheet is arranged substantially in the guide plane.
  • at least one second guide element for the printed sheet is formed, which is arranged between the at least one, first guide element and the compressed air device and extends directly into the region of the outlet openings of the segments.
  • At least one first and one second folding positions arranged in the guide plane are formed in the second feed direction one behind the other and are arranged at a distance from one another. Downstream of the folding rollers at least two removal lines for printed sheets are arranged.
  • the first removal path is formed at least one provided in the first folding position sheet and the second removal path at least one provided in the second folding positions printable recordable.
  • the printing sheet is provided in one of at least two folding positions provided one behind the other in the second feeding direction. The respective folding position is selected according to a given production order and the compressed air impact is only on the provided in the folding position sheet. The sheet is taken after folding of one of at least two removal lines.
  • At least two successive printed sheets are each provided in a different one of the at least two provided folding positions and, after folding, respectively taken up by a different one of the at least two removal sections.
  • the printed sheets can be divided particularly easily with this solution to at least two product streams, whereby a corresponding switch function of a upstream or downstream device can be saved.
  • a rejection not the quality requirements corresponding sheet possible while parallel to the production continues on the first folding position and cooperating with this removal distance.
  • At least one first and one second folding position are formed in the guide plane, in succession in the second feeding direction, and are arranged overlapping one another.
  • a common removal path is arranged, which is at least one provided in the first folding position sheet and at least one sheet provided in the second folding position formed overlapping each other in the second feed direction recordable.
  • at least two successive printed sheets are each provided overlapping each other in another of at least two folding positions provided in succession in the second feeding direction.
  • the respective folding position is selected according to a given production order. The compressed air impact takes place only on sheet in the folding position. The sheets are finally taken overlapping each other after folding from a common removal path.
  • the latter has at least one first stop and at least one second stop arranged in the guide plane, wherein the second stop is arranged upstream of the first stop in the second feed direction.
  • Both stops can be raised and / or raised via the guide plane formed lowerable under the management level. These optional stops are used to help provide the signature in the appropriate folding position.
  • the compressed air device has an alignment plane extending parallel to and spaced from the guide plane and is arranged displaceable and / or pivotable in this alignment plane.
  • the compressed air device can be displaced and / or pivoted parallel to the guide plane and a twisted supplied or positioned printed sheet can nevertheless be optimally conveyed to the folding rollers by means of a compressed air impact resulting from correspondingly aligned outlet openings.
  • At least one second compressed-air impact directed at the same pressure sheet takes place, the pressure and / or the duration of the second compressed-air impact being preferably chosen differently from the first compressed-air impact.
  • the folding quality of the sheet can be further improved.
  • the formation of donkey ears at the trailing ends of the folded sheet can be avoided by at least one such additional compressed air impact.
  • the compressed air impact is suppressed to a printed sheet provided and this printed sheet is discharged in the guide plane.
  • the at least one control element of at least one segment of the compressed air device can be controlled by the control unit in such a way that a period of time for the at least one outlet opening of this segment to be pressurized with compressed air and / or a cross-sectional area of this outlet opening and / or a pressure thereof Outlet feedable air pressure to the properties of the provided sheet are customizable.
  • the duration of the action of the at least one outlet opening of at least one segment of the compressed air device with compressed air and / or the cross-sectional area of this outlet opening and / or the pressure of the compressed air supplied to this outlet opening is changed by means of the control unit and the control unit triggers a correspondingly to the characteristics of provided printed sheet modified compressed air shock.
  • the segments of the compressed air device advantageously each have at least one first control element for varying the duration of the pressurization of the at least one outlet opening with compressed air and / or at least one second control element for changing the cross-sectional area of this outlet opening and / or at least one third control element for changing a pressure of the compressed air that can be supplied to this outlet opening.
  • At least one segment of the compressed air device has at least two first outlet openings with equal cross-sectional areas and at least two second outlet openings with equal cross-sectional areas, wherein the cross-sectional areas of the first outlet openings preferably have a different size to the cross-sectional areas of the second outlet openings.
  • this segment has at least one control element and at least one other control element for varying the duration of the pressurization of the outlet openings with compressed air and for changing the cross-sectional areas of the outlet openings, wherein the first outlet openings are connected to one control element and the second outlet openings are connected to the other control element.
  • this segment has at least one further control element connected to the outlet openings for varying a pressure of the compressed air which can be supplied to the outlet openings.
  • the duration of pressurization of the first and second outlet openings with compressed air and the cross-sectional areas of the outlet openings are respectively modified by applying the first outlet openings through the one control element and the second outlet openings through the other control element according to the properties of the sheet to be folded provided
  • a pressure of the outlet openings supplied compressed air is changed by acting on the at least one, connected to the outlet openings, further control element.
  • both the cross-sectional areas of the outlet openings of the compressed air device and the duration of pressurization of these outlet openings can be changed very easily, quickly and precisely, whereby both the folding quality and the folding performance can be further improved in a cost effective manner ,
  • a device for the transverse folding of each having at least two printed pages 1, a guide plane 3, in each of which a sheet 1 fed and provided for folding and is forwarded from the sheet 1 for folding.
  • the guide plane 3, which extends horizontally here can also be arranged vertically or at any angle in space, which, depending on the specific conditions of use, enables a large number of constructional options.
  • a single sheet 1 described and in the figures only a single sheet 1 is shown, it is in each case at least one sheet 1, that is either actually about a single or more superimposed Sheet 1.
  • first side 4 of the guide level 3 which is shown in the first embodiment for illustrative reasons below the guide level 3, two folding rollers 5 are arranged. These each have an axis of rotation 6 and form between them a folding gap 7 for on a prepared or on a non-prepared fold line 8 to be folded sheet 1 from.
  • the axes of rotation 6 of the folding rollers 5 are aligned both parallel to one another and parallel to the guide plane 3.
  • second side 9 of the guide level 3 which in the in Fig. 1 shown first embodiment is shown above the guide level 3, a compressed air device 10 is arranged in the region of the folding gap 7.
  • the compressed air device 10 of the device 2 is formed segmented.
  • Each segment 32 has at least two, but preferably more than two, in a substantially perpendicular to the axes of rotation 6 of the folding rollers 5 extending, first feed direction 26 juxtaposed segments 32.
  • Each segment 32 has at least one, but preferably a plurality of directed to the folding gap 7 outlet openings 11th for compressed air 12 and is via a compressed air line 13 with a compressed air source 14 and this in turn connected via a control line 15 to a control unit 16 of the device 2.
  • each segment 32 has a designed as a solenoid valve, for example, first control element 17 for varying the duration of exposure of the at least one outlet opening 11 with compressed air 12, a here designed as a slide, for example, second control element 18 for changing a cross-sectional area 19 of the outlet opening 11 and an example formed as a pressure reducing valve, arranged in the compressed air line 13, third control element 20 for changing a pressure of the outlet opening 11 can be supplied with compressed air 12.
  • the controls 17, 18, 20 are each connected via a control line 15 to the control unit 16.
  • a first guide element 21 is arranged for the printed sheet 1 resting thereon during the provision and provided with a recess 22 formed in the region of the folding gap 7 for the printed sheet 1 and for each of the outlet openings 11 in the form a compressed air surge 12 'ejected compressed air 12 is provided.
  • a second guide element 23 is provided for the printing sheet 1, which is arranged between the first guide element 21 and the compressed air device 10 and possibly cooperates with the first guide element 21.
  • the first guide member 21 for example, a guide table can be used.
  • a guide table can be used instead of a single guide table and a plurality of narrow guide elements spaced from each other, ie, arranged side by side and / or.
  • the first guide member 21 may be extended in the region of its recess 22 from the guide level 3 to near the area of the folding rollers 5, to ensure better management of the sheet 1 to the folding rollers 5.
  • a second guide member 23 may also be a fixed element, such as a guide plate, use.
  • the second guide element 23 extends directly into the region of the outlet openings 11 of the segments 32, so that advantageously also the two trailing ends of the sheet 1 fed into the folding gap 7 between the folding rollers 1 can be guided defined by the second guide member 23.
  • the second guide member 23 may have a plurality of narrow individual elements, which are spaced apart, juxtaposed and / or arranged one behind the other.
  • the first and the second guide element 21, 23 can also be arranged horizontally, vertically or at any angle in space, depending on the specific conditions of use.
  • the device 2 has a transport unit 24, consisting of an upper conveyor belt 25 and two circulating lower conveyor belts 25 ', 25 ", with which the printed sheets 1 in the substantially perpendicular to the axes of rotation 6 of the folding rollers 5 extending first feed direction 26 is provided
  • the device 2 can be used for the transverse folding of printed sheet 1.
  • inventive device 2 ' has a parallel to the axes of rotation 6 of the folding rollers 5 extending, second feed direction 26' for the sheet 1 and, accordingly, also parallel to the axes of rotation 6 of the folding rollers 5 extending, second transport unit 24 'with upper and lower conveyor belts 27, 27' on.
  • the further components of the device 2 ' essentially correspond to the device 2 described for the first exemplary embodiment, the segments 32 of the compressed air device 10 being arranged one behind the other in the second feed direction 26' of the printed sheet 1.
  • the segments 32 of the compressed air device 10 via the control unit 16 each receive a trigger pulse for a directed to the folding line 8 of the respective sheet 1 compressed air surge 12' through the at least one outlet opening 11.
  • a period of exposure of the at least one Outlet opening 11 of the segments 32 with compressed air 12 and / or a cross-sectional area 19 of this outlet opening 11 and / or a pressure of this outlet opening 11 supplied compressed air 12th adapted to the properties of the printed sheet 1 provided and changed by means of the control unit 16.
  • the properties of the supplied printed sheets 1 are known in advance to the control unit 16, which activates the first control element 17 and / or the second control element 18 and / or the third control element 20 with changing properties of the sheet 1 to be folded.
  • the time duration of the admission of the at least one outlet opening 11 of the segments 32 with compressed air 12 is changed in each case by activating the first control element 17.
  • the cross-sectional area 19 of this outlet opening 11 is changed in each case by activation of the second control element 18.
  • Changing the pressure of the compressed air 12 which can be supplied to this outlet opening 11 takes place in each case by activation of the third control element 20.
  • the compressed air surge 12 'corresponding to the control unit 16 respectively known feeding speed of a sheet 1 are triggered, the time until the impact of the compressed air 12 is to include the fold line 8 of this sheet 1.
  • the compressed-air impact 12 'can also be triggered on the basis of an actual position of the printed sheet 1 detected, for example, by means of a sensor (not shown).
  • the triggering time of the compressed air surge 12 'can also be varied. In this way, successive printing sheets 1 can be provided in different folding positions, so that the folded printed sheets 1 overlap one another in the first or in the second feeding direction 26, 26 'and can be separated at the overlapping points for further processing if required.
  • the printed sheet 1 Under the action of the compressed-air impact 12 ', the printed sheet 1 is guided at its fold line 8 into the folding gap 7 located between the folding rollers 5 and there either folded transversely (FIG. Fig. 1 ) or longitudinally folded ( Fig. 2 ). The folding rollers 5 then transport the folded printed sheet 1 to a removal section 28 (not shown).
  • an unillustrated sensor Downstream of the folding rollers 5, an unillustrated sensor can be arranged, which dog ears, stapes, etc. recognizes and corresponding signals to the connected to it control unit 16. After automatic evaluation of this information, the segments 32 of the compressed air device 10 or the respective compressed-air impact 12 'can be correspondingly controlled in order to avoid such quality defects in the future. Thus, the compressed air device 10 and thus the entire device 2, 2 'formed self-learning.
  • the control unit 16 can suppress the respective trigger pulse for a compressed-air impact 12', so that this printed sheet 1 is conveyed by means of the respective transport unit 24 , 24 'in the management level 3 to a Ausschleusumble 29 (not shown) Fig. 1 ) and thus discharged from the device 2, 2 '. Therefore, advantageously, a corresponding switch function of an upstream or downstream device can be saved.
  • both the compressed air device 10 and the folding rollers 5 each have a longitudinal extent a, b, which are formed substantially the same size but of course can also be designed differently large.
  • the segmented compressed air device 10 of the device 2 ' has three segments 32, which are arranged one behind the other in the second feed direction 26' of the device 2 '.
  • compressed air devices 10 having only two or more than three segments 32 may also be used.
  • Each segment 32 of the compressed air device 10 is formed separately controllable with compressed air 12 and has an outlet opening 11 for the compressed air 12.
  • per segment 32 also a plurality of outlet openings 11 may be used and in at least one row 31 (FIG. Fig. 4 ) to be ordered.
  • the segments 32 each have their own, also designed as a solenoid valve, first control element 17 and connected via a respective compressed air line 13 to the compressed air source 14.
  • the segments 32 each have a second, designed as a slider example control 18 and in each case a third, designed as a pressure-reducing valve control 20 on.
  • all the control lines 15 are here shown by the control unit 16 to the first control elements 17 and the compressed air source 14, while only one of the control lines 15 to the second and the third control elements 18, 20 has been shown.
  • the outlet openings 11 of the segments 32 each have a cross-sectional area 19, wherein the size of the cross-sectional areas 19 can be changed, for example, by using correspondingly adjustable diaphragms (not shown here) controlled by the second control element 18.
  • the shape of the cross-sectional areas 19 is arbitrary, i. For example, round, semicircular or elliptical, but also rectangular, triangular or slit-shaped cross-sectional areas 19 can be used.
  • the compressed air 12 can be supplied to the outlet openings 11 respectively by a corresponding, via the control unit 16 subsequent activation of the third control element 20 with different pressure. Also alternatively or additionally, finally, by means of the first control elements 17 and the duration of the loading of the segments 32 and thus the outlet openings 11 can be changed with compressed air 12.
  • the respective sheet 1 is therefore clocked in the second feed direction 26' centrally and parallel to the axes of rotation 6 of the folding rollers 5 and thus supplied in parallel to the compressed air device 10 and in a folding position 33 for Folded provided.
  • the control unit 16 solves a compressed air surge 12 'through the outlet openings 11 of the segments 32 of the compressed air device 10 via control lines 15 connected to the first control elements 17 out as soon as the respective sheet 1 has reached the folding position 33.
  • the control unit 16 determines the required pressure of the generated compressed air surge 12 'and adjusts this by means of the third control element 20 accordingly or adjusts this if necessary.
  • the control unit 16 and via the second control element 18 by means of the control unit 16 and via the second control element 18, the cross-sectional areas 19 of the outlet openings 11 and / or via the first control elements 17, the duration of the application of the respective segment 32 and thus the duration of the compressed-air impact 12 'can be adjusted.
  • the average duration of a compressed-air surge 12 ' is approximately 5 to 10 milliseconds (ms) and the pressure used is in the range of approximately 300 to 800 kPa (3 to 8 bar).
  • the mostly multilayer printed sheet 1 is transported out of the guide plane 3 out to the rotating folding rollers 5, ie pressed against the folding rollers 5 almost flatly.
  • the sheet 1 is first in the range of its by the impact of compressed air 12 leading fold line 8 and finally completely between the folding rollers 5, that is drawn in the seam gap 7, pressed there at the fold line 8 and finally forwarded down to the untranslated removal section 28 ,
  • the device 2 Due to the variability of the size of the cross-sectional areas 19 and the additional or alternative, with different pressure and / or time duration supplying the compressed air 12 to the outlet openings 11, the device 2 'relatively simple and fast according to the characteristics of the respective sheet 1 and according to the Requirements of a current production order are adjusted or adjusted.
  • the Fig. 4 shows a schematic representation of a section through a in Fig. 3 represented segment 32 of the compressed air device 10.
  • the segment 32 has two separate, connected to the compressed air source 14 and each by means of a likewise designed as a solenoid valve control 17 ', 17 "both for varying the time duration of the application of the outlet openings 11 ', 11 "with compressed air 12 as well as for changing cross-sectional areas 19', 19" of the outlet openings 11 ', 11 "provided compressed air lines 13', 13".
  • segment 32 in each case one to the compressed air lines 13 ', 13 ", arranged in the interior of the segment 32 distribution line 30', 30" for four first and second outlet openings 11 ', 11 ", wherein the first outlet openings 11' with one control element 17 'and the second outlet openings 11 "are connected to the other control element 17.”
  • the four outlet openings 11', 11 "shown here two, three or more than four outlet openings can of course also be connected to the distribution line 30 '.
  • both control elements 17 ', 17 "are opened this results in a high pressure of the compressed air 12 available in the segment 32, ie a relatively strong compressed-air impact 12'
  • Controls 17 ', 17 "closed the segment 32 is inactive. If only the control 17 "connected to the respective outlet openings 11" equipped with a small cross-sectional area 19 is opened, a weak compressed-air impact 12 'results, while a medium-pressure compressed-air impact 12' is produced, if only that with the respective larger cross-sectional area
  • By opening or closing both control elements 17 ', 17 " the time duration of the loading of the segment 32 with compressed air 12 is also changed.
  • Fig. 4 is indicated by dash-dotted lines, that for this purpose the two compressed air lines 13 ', 13 "are brought together to the compressed air line 13.
  • a plurality of outlet openings 11', 11 "of a segment 32 connected to the same control element 17 ', 17" are thus actuated together with compressed air 12.
  • the compressed-air impact 12 'of a segment 32, several or all segments 32 can be dosed easily and quickly according to the properties of the printed sheet 1 provided in the folding position 33.
  • the cross-sectional areas 19 ', 19 "of the first and second outlet openings 11', 11" of the segment 32 of the compressed air device 10 may be the same size, but then only a smaller gradation of the dosage of a compressed-air surge 12 'is achieved, as with the Likewise, the cross-sectional areas 19, 19 ', 19 “of the outlet openings 11, 11', 11” of different segments 32 can have a different size and / or compressed air 12 can reach the outlet openings 11, 11 '. , 11 "different segments 32 supplied with different pressure and / or the time duration of the application of different segments 32 are selected differently with compressed air 12.
  • the segments 32 can advantageously trigger identical or different bursts of compressed air 12 '.
  • the folding process can be optimally matched to the properties of a sheet 1 to be folded, such as grammage, size, coefficient of friction, porosity, ink coverage, etc., already specified above, and thus a consistently good folding quality can be achieved.
  • a deviation from the folding position 33 of the printed sheet 1 provided can be at least partially corrected by using at least one of these measures.
  • the outlet openings 11, 11 ', 11 "of the segments 32 of the compressed air device 10 are arranged in a row 31, which is formed in a plane, not shown, extending substantially perpendicularly through the guide plane 3.
  • FIG. 5a and 5b show in a further exemplary embodiment in each case a schematic side view of a device 2 "for longitudinal folding of printed sheets 1 ', 1", wherein for reasons of clarity already in the FIGS. 1 to 4 have been omitted controls shown.
  • the compressed air device 10 of this device 2 is equipped with three downstream segments 32 'and with three upstream segments 32" and has two in the second feed direction 26' successively arranged folding positions 33 ', 33 ", in which sheet 1', 1" with the only indicated here, the second transport unit 24 'and on the first guide member 21 are provided.
  • the device 2 To assist in providing a signature 1 'in the first folding position 33', the device 2 "is provided with a first stop 35 'arranged in the guide plane 3 and at a downstream end 34 of the device 2". To support the provision of a printing sheet 1 "in the second folding position 33", at least one further stop 35 "is arranged upstream of the at least one first stop 35 'and spaced from the first stop 35' by an over-sized value. can be raised via the management level 3 and / or formed lowerable under the management level 3. Opposite in the Figures 1 and 2 shown devices 2, 2 ', the device 2 "two removal lines 28', 28" for folded sheet 1 ', 1 "on.
  • the device 2 Analogously to the device 2 ', the device 2 "is supplied with a first printed sheet 1' in the second feed direction 26 'in the middle and parallel to the axes of rotation 6 of the folding rollers 5, ie provided for folding Feeding direction 26 'successively provided folding positions 33', 33 ".
  • the respective folding position 33 ', 33 " is selected according to a given production order and the compressed-air impact 12' takes place in each case only in the folding position 33 ', 33".
  • the control unit 16 triggers via the first control element 17 a compressed air surge 12 'through the outlet openings 11 of the segments 32' of the compressed air device 10 as soon as the signature 1 'has reached the desired folding position 33'
  • the devices 2, 2 ' can also transport a printing sheet 1', 1 "which does not meet the quality requirements to the removal path 29 by means of the transport unit 24 'in the guide plane 3 and thus be discharged from the device 2" 35 'is either raised above the guide level 3 or lowered below it, which is why a corresponding switch function of an upstream or downstream device can also be saved in this exemplary embodiment.
  • Fig. 5a the device 2 "is shown in a first method step, in which first the first printed sheet 1 'supplied in the guide plane 3 has been provided in the first folding position 33' on the first stop 35 ' Time has likewise already been partially introduced into the device 2 "For triggering a compressed-air impact 12 'and thus for feeding the first printed sheet 1' to the folding rollers 5, by actuation of their first control elements 17, only the three downstream segments 32 'in the feed direction 26' are the compressed air device 10 is supplied with compressed air 12, while the three upstream segments 32 "are turned off. The folded first printed sheet 1 'is then forwarded by the folding rollers 5 to the first removal path 28'.
  • the subsequent printing sheet 1 can then be conveyed either to the same folding position 33 'on the first stop 35' or as in Fig. 5b as second method step, are provided in the further upstream second folding position 33 "after previously lifting the second stopper 35" into the guiding plane 3 of the device 2 "by acting on only the upstream segments 32" of the compressed air device 10 this sheet 1 "then also promoted to the folding rollers 5, there folded and the second removal section 28" passed.
  • the device 2 can be operated by means of the control unit 16 depending on the current production order such that the printed sheets 1 ', 1" are alternatively provided in one of the two folding positions 33', 33 "and thus the corresponding removal section 28 ', 28". be supplied.
  • Fig. 5c and 5d show a further similar embodiment, with a device 2 "', with the place of the two spaced apart folding positions 33', 33" of the Fig. 5a and 5b two folding positions 36 ', 36 "overlapping one another in the second feed direction 26' and a common removal distance 37 for overlapping printed sheets 1 ', 1" are formed.
  • a product stream 38 can be advantageously produced on the common removal path 37, partially overlapping (see double arrow), folded printed sheet 1 ', 1 "in the second feed direction 26', which later either form a common book block or again
  • this device 2 "'by repeatedly successively providing printing sheet 1' in the first folding position 36 'or by repeatedly successively providing printing sheet 1" in the first folding position 36' and / or in the Second folding position 36 "also an unillustrated, second product stream from each other in the second feed direction 26 'partially overlapping sheet 1', 1" are generated, in which several consecutive sheet 1 'or more consecutive sheet 1 "also transverse to partially overlap second feeding direction 26 '.
  • the compressed air joint 12 'even before reaching the respective folding position 33, 33', 33 ", 36 ', 36" are triggered to', the sheet 1 ', 1 "by a corresponding, transversely to the feed direction 26' occurring deformation such to stiffen that by abutment of the sheet 1 ', 1 "to the stops 35', 35" existing risk of deformation in the feed direction 26 'can be excluded.
  • both the device 5" FIGS. 5a and 5b
  • the device 2 "' FIGS. 5c and 5d
  • the provision of the printing sheets 1 ', 1 "in the respective folding position 33', 33", 36 ', 36 takes place exclusively by means of the second transport unit 24' and the guide elements 21, 23.
  • the stops 35 ', 35 can then optionally serve to support the provision of the printed sheets 1', 1" serve.
  • the device 2 As in Fig. 6 indicated by double arrows, which also has three segments 32 having compressed air device 10 in a parallel and spaced from the guide plane 3, not shown, the device 2 'extending alignment plane 39, for example, designed to be motorized and / or pivotable. Therefore, one of the device 2 'slightly shifted or twisted supplied sheet 1, the fold line 8 deviates from the row 31 of the outlet openings 11, by corresponding displacement and / or pivoting of the compressed air device 10 exactly at the fold line 8 pressurized air 12 and into the be transported between the fold rollers 5, not shown here formed fold 7.
  • the corresponding offset ie the absolute amount by which a sheet 1 to be folded is shifted or rotated in the guide plane 3, is determined by means of sensors, not shown, and forwarded to the control unit 16. Then, the control unit 16 acts on a servo motor, also not shown, which shifts the compressed air device 10 in the alignment plane 39 and / or pivots and thus compensates for the offset of the sheet 1.
  • FIG. 7 a further embodiment with a likewise three segments 32 having compressed air device 10
  • the outlet openings 11 in three parallel to the folding gap 7 extending rows 31 ', 31 ", 31"' are arranged.
  • the compressed air device 10 does not have to adapt the position of the outlet openings 11 as in the case of FIG Fig. 6 shown embodiment can be moved and / or pivoted in an alignment plane 39. Rather, to compensate for the offset sufficient control of the in the respective rows 31 31 ", 31 '' located outlet openings 11, which are parallel to the folding gap 7 and segmentally offset offset with compressed air 12 applied.
  • the displacement of the sheet 1 shown in the first row 31 'could include the outlet openings 11 of the upstream segment 32, the outlet openings 11 of the middle segment 32 arranged in the second row 31 ", and the outlet openings 11 of the downstream located in the third row 31"' Segments 32 are controlled by compressed air 12.
  • the outlet openings 11 of the compressed air device 10 in two or more than three, each aligned parallel to the folding gap 7 rows 31 and be arranged in more than three segments 32.

Landscapes

  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP13190216.5A 2012-10-30 2013-10-25 Dispositif et procédé destinés à plier des feuilles imprimées Active EP2727869B8 (fr)

Applications Claiming Priority (1)

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CH21802012 2012-10-30

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DE102016203043A1 (de) * 2016-02-26 2017-08-31 Heidelberger Druckmaschinen Ag Verfahren zum Falzen von Bogen und Falzmaschine
EP3533609A1 (fr) 2018-02-28 2019-09-04 Müller Martini Holding AG Dispositif et procédé de traitement ultérieur séquentiel de feuilles imprimées
EP3597430A1 (fr) 2018-07-17 2020-01-22 Müller Martini Holding AG Dispositif et procédé pour le pliage transversal sélective de feuilles imprimées en séquence
DE102022124182A1 (de) 2022-09-21 2024-03-21 Müller Martini Holding AG Dynamischer Nutzenwechsel

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RU2740090C2 (ru) 2011-11-10 2021-01-11 ПЭКСАЙЗ, ЭлЭлСи Вертикальная картонажная установка с разгрузочной направляющей
JP6347060B2 (ja) * 2014-08-28 2018-06-27 デュプロ精工株式会社 紙折装置
BR102015024953A2 (pt) * 2014-10-01 2016-04-12 Müller Martini Holding AG freio para folha de impressão
US10850469B2 (en) 2016-06-16 2020-12-01 Packsize Llc Box forming machine
US11242214B2 (en) * 2017-01-18 2022-02-08 Packsize Llc Converting machine with fold sensing mechanism
CN107187927B (zh) * 2017-07-11 2023-04-07 德普惠（福建）自动化设备有限公司 一种黄纱布包覆折叠装置及其使用方法
US11247427B2 (en) 2018-04-05 2022-02-15 Avercon BVBA Packaging machine infeed, separation, and creasing mechanisms
US11305903B2 (en) 2018-04-05 2022-04-19 Avercon BVBA Box template folding process and mechanisms
US11634244B2 (en) 2018-06-21 2023-04-25 Packsize Llc Packaging machine and systems
CN109849432A (zh) * 2018-11-05 2019-06-07 广德美好包装科技有限公司 一种纸袋包装压边机

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DE3544495A1 (de) 1985-12-17 1987-06-25 Fritz Steffen Falzmaschine mit automatischer anschlaganpassung
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DE102016203043A1 (de) * 2016-02-26 2017-08-31 Heidelberger Druckmaschinen Ag Verfahren zum Falzen von Bogen und Falzmaschine
DE102016203043B4 (de) * 2016-02-26 2018-05-09 Heidelberger Druckmaschinen Ag Verfahren zum Falzen von Bogen und Falzmaschine
EP3533609A1 (fr) 2018-02-28 2019-09-04 Müller Martini Holding AG Dispositif et procédé de traitement ultérieur séquentiel de feuilles imprimées
EP3597430A1 (fr) 2018-07-17 2020-01-22 Müller Martini Holding AG Dispositif et procédé pour le pliage transversal sélective de feuilles imprimées en séquence
US11034542B2 (en) 2018-07-17 2021-06-15 Müller Martini Holding AG Apparatus and method for the optional cross-folding of sequentially printed sheets or signatures
DE102022124182A1 (de) 2022-09-21 2024-03-21 Müller Martini Holding AG Dynamischer Nutzenwechsel
EP4349610A2 (fr) 2022-09-21 2024-04-10 Müller Martini Holding AG Changement dynamique d'utilité

Also Published As

Publication number Publication date
US9650224B2 (en) 2017-05-16
EP2727869B8 (fr) 2016-03-16
EP2727869B1 (fr) 2016-01-06
US20140121093A1 (en) 2014-05-01
JP6247498B2 (ja) 2017-12-13
JP2014088266A (ja) 2014-05-15

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