EP0778131B2 - Bogenführsystem für eine Druckmaschine - Google Patents

Bogenführsystem für eine Druckmaschine Download PDF

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Publication number
EP0778131B2
EP0778131B2 EP96117740A EP96117740A EP0778131B2 EP 0778131 B2 EP0778131 B2 EP 0778131B2 EP 96117740 A EP96117740 A EP 96117740A EP 96117740 A EP96117740 A EP 96117740A EP 0778131 B2 EP0778131 B2 EP 0778131B2
Authority
EP
European Patent Office
Prior art keywords
sheet
air
guiding
guiding system
upstream
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.)
Expired - Lifetime
Application number
EP96117740A
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German (de)
English (en)
French (fr)
Other versions
EP0778131A1 (de
EP0778131B1 (de
Inventor
Günter Stephan
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0778131A1 publication Critical patent/EP0778131A1/de
Application granted granted Critical
Publication of EP0778131B1 publication Critical patent/EP0778131B1/de
Publication of EP0778131B2 publication Critical patent/EP0778131B2/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F25/00—Devices for pressing sheets or webs against cylinders, e.g. for smoothing purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/102—Combinations of transfer drums and grippers with pneumatic means

Definitions

  • the invention relates to a sheet guiding system on a printing press according to the preamble of claim 1.
  • the sheets of drums and cylinders are fed through the machine.
  • the leading edge of a sheet is passed from one gripper row to the next.
  • a clean and flutter-free guidance of the sheets without greasing the printed surface is essential.
  • DE 43 42 203 A1 proposes to design a sheet transport system of the type mentioned above in such a way that the discharged from the upstream cylinder to the transfer drum sheet is acted upon by a blower from above, ie in the direction of sheet transfer, with air.
  • a hot air knife for drying the sheet is assigned to the upstream cylinder. After transferring an arc to the downstream cylinder, the arrangement of further air knife is proposed for Bogenbowung.
  • the described sheet guiding system is also very expensive and requires a high energy input.
  • the invention has for its object to make available a simply ausgestaltetes sheet guiding system of the type mentioned in which by targeted material flows the sheet guide and - if drying between the printing units is provided - the drying is improved with reduced energy consumption
  • the invention has the advantage that with little mechanical effort, the air of the aforementioned blowing device is used multiple times. It is used first to blow the transferred to the downstream sheet-guiding cylinder bow, and then this blowing air is directed in the direction of the upstream sheet-guiding cylinder to achieve there a secure bowing. In addition, the drag effect of the upstream sheet-guiding cylinder is used. Thereafter, some of the blowing air is used as carrying air for the guidance of the funded by the transfer drum bow.
  • the sheets are so relined with carrying air that flapping movements prevented or at least the vibrations are strongly damped. This is achieved in that the surface of the transfer drum and the arc form a closed chamber in which the air is compressed. Therefore, in the area of the sheet guiding system, a force always acts on the printed side of the sheet, whereby a secure bowing is achieved.
  • the blowing device is expediently arranged in such a way that it blows against the sheet travel direction in the direction of the downstream sheet-guiding cylinder.
  • it can be arranged on the air guide, wherein it is also advantageous if it is adjustable with respect to their orientation on the downstream sheet-guiding cylinder. In this way, the blowing direction can be optimized depending on the printed fabrics.
  • the blowing device can also be arranged on the transfer drum. In this case, the blowing takes place in the machine cycle depending on the position of the transfer drum.
  • a further improvement of the sheet guiding in the region of the transfer drum can be achieved that extends along the path of movement of the gripper rows in the lower region of the transfer drum a sheet guiding from the upstream to the downstream sheet-guiding cylinder.
  • This sheet guiding device can be designed as a closed or substantially closed baffle.
  • An improvement in the bowing on the upstream sheet-guiding cylinder is achieved in that below the air guide between the trajectory of the rows of grippers and the upstream sheet-guiding cylinder arranged in the direction of the latter is arranged
  • This may consist of sheets lying parallel to the air guide, as a louvred grid or guide grille or be designed as guide channels. It is generated by a vortex-free laminar air flow, which ensures a secure support of a sheet on the upstream sheet-guiding cylinder. If the ends of horizontally extending metal sheets of the louver are provided with bends directed towards the upstream sheet-guiding cylinder, the sheet blowing is further intensified. Such a bend can also be provided at the end of the air guide, which serves the same effect.
  • a further amplification of the blowing on the upstream sheet-guiding cylinder can be achieved in that the air outlet opening is formed as an air outlet channel The air for the blowing is further compressed and the area of the air supply of the upstream sheet-guiding cylinder further increases
  • a dryer In this air outlet, a dryer can be arranged, which intensifies the drying. It can be carried out as a radiation dryer with ultraviolet or infrared radiation or as a dryer, which blows the bow with additional dry, possibly also warm air. Of course, both can be combined.
  • Another embodiment provides that the air outlet and the air inlet are connected to the recirculation system.
  • means for removing the humidity are arranged between the air outlet and the air inlet.
  • Such a configuration should be especially then be provided when colors are processed, which in addition to the moisture still contain solvents that should not get into the work space.
  • the better removal of the moist and supplying dry as possible air is a further development, which provides that leading to the blowing device air inlet leads into the printing machine and leads out of the air outlet opening downstream air outlet from the printing press.
  • the air inlet and the air outlet for example, by openings of a tread plate, preferably in the form of lattices, are formed.
  • a tread plate as it is arranged between the printing units of a multi-color printing machine, can also serve as an air guide at the same time.
  • the air outlet is not discharged into the working space, but to the outside.
  • the possibility of such controlled removal of the exhaust air is possible due to the closed space formed by the device. It is a further great advantage of the invention, since in this way the health conditions of the working rooms are improved and the exhaust air can be fed to a cleaning.
  • the sheet transfer area can take on the function of a drying line, whereby the use of an additional drying plant, e.g. between two paint units, can be omitted and can achieve a more compact design and associated cost savings.
  • the spoiler can be fixed by means of a hinge on the machine, in such a way that it can be folded away upwards. In this way, the transfer drum is easily accessible. This is for better maintenance and cleaning of the machine.
  • Fig. 1 shows a first embodiment of a sheet guiding system for a printing press. It is arranged on a transfer drum 1, which is located between an upstream sheet-guiding cylinder 2 and a subsequent sheet-guiding cylinder 3.
  • the sheet-guiding cylinders 2 and 3 are impression cylinders.
  • the transfer drum 1 can also be located between other cylinders, for example, varnishing cylinders or drums, which serve for the transfer of sheets. It is also the arrangement in a turning device conceivable.
  • the sheet-guiding cylinders 2 and 3 in the embodiment act as a counter-pressure cylinder with rubber cylinders 24 together, wherein in the gap between the two cylinders, the sheets 12, 12 ', 12 "are printed.
  • the transfer drum 1 has two gripper rows 4. However, the sheet guiding system is not limited to such a transfer drum 1, there may also be three, four or more gripper rows 4 are present. It is essential that between the gripper rows 4 closed or substantially closed surfaces 5 exist. These are required to achieve the effect similar to that of a rotary piston.
  • the directions of rotation of the cylinders 2, 3 and 24 and the transfer drum 1 are indicated by arrows 47.
  • Above the transfer drum 1 there is an air guide element 8, which is located at a small distance from the movement path 7 of the gripper rows 4. This distance must be such that in any case a collision-free movement of the transfer drum 1 is ensured.
  • the spoiler 8 extends from upstream sheet-guiding cylinder 2 to the downstream sheet-guiding cylinder 3, but it does not necessarily complete with one of these cylinders 2 or 3, but can for example you zoom up to one of the two blanket cylinder 24 zoom. It is essential that an air space 9 extending from the upstream sheet-guiding cylinder 2 to the downstream sheet-guiding cylinder 3 is produced, which is essentially delimited by the cylinders 2, 3 of the drum 1, the air guide element 8 and other lateral walls (not shown). This air space 9 should be substantially sealed, with the exception of an air outlet opening 10, which is located at the leading to the upstream sheet-guiding cylinder 2 end of the spoiler 8.
  • the other end of the air guide 8 is formed in this embodiment of a blowing device 6, which is arranged by means of a movable, tight connection 25 pivotally mounted on the air guide 8.
  • This supplied air 34 is directed to an action region 27 of the downstream sheet-guiding cylinder 3. It serves to achieve a quiet flutter-free bowing on this cylinder 3.
  • the seal to the side can be made by the fact that the air guide 8 protrudes as close as possible to the side walls.
  • the cylinders 2, 3 and 24 can be sealed by the fact that they protrude as far as possible to the side walls.
  • Those can be designed such that they correspond to the movement path 7 of the gripper rows 4 or are slightly larger. It is also possible that parts of the side walls, for example, those that lie between the rotating parts, are formed increased and thus provide an even better seal.
  • the seal can be made by additional lateral components such as plates, sheets, etc., which are mounted on the side wall.
  • a sheet guiding device 11 is arranged on the lower side of the transfer drum 1, which is so outside the path of movement 7 of the rows of grippers 4, that at her an arc 12, 12 ', 12 ", guided along as possible without touching
  • the sheet guiding device 11 can be designed as a closed guide plate or as a sliding guide, in the latter case it can be a nozzle plate, which ensures that the sheets 12, 12 ', 12 "are guided along an air cushion. This embodiment is particularly useful when sheets are to be printed on both sides and therefore contact the outside of the sheet should be avoided in any case.
  • an air guiding device 13 is arranged below the air guide element 8 in the region between the movement path 7 of the gripper rows 4 and the upstream sheet-guiding cylinder 2.
  • the louver 13 may for example consist of parallel to the air guide element 8 sheets 14, which point in the direction of the upstream sheet-guiding cylinder 2 in order to achieve a laminar air flow in this direction.
  • guide channels, louvred grille or stationary vanes are examples of guide channels, louvred grille or stationary vanes.
  • the air outlet opening 10 is preferably designed as an air outlet channel 18 shown in FIG. 1, which extends substantially parallel to the surface of the upstream sheet-guiding cylinder 2 counter to the direction of rotation 47 of the cylinder 2.
  • This air outlet channel 18 serves to generate a congestion, the pressure of which has a good bowing on the upstream sheet-guiding cylinder 2 result.
  • the accumulation effect arises from the fact that the exhaust air exiting from the air outlet channel 18 33 coincides with the drag flow 37 of the upstream sheet-guiding cylinder 2.
  • a dryer 19 may be arranged in addition. It can be a radiation dryer which emits ultraviolet or infrared radiation in the direction of the sheets 12, 12 ', 12' or it is also possible to operate the dryer 19 with blown air, with warmed blown air or with radiation and blown air.
  • the freshly printed side 51 of the sheet 12, 12 ', 12 is in the area of blown or carrying air, thereby ensuring good guidance and drying of the sheet 12, 12', 12" between the printing gaps 50 and 50 'achieved.
  • Figs. 2 to 5 serve to explain the function of the sheet guiding system, wherein in these figures, a second embodiment is shown. It differs in that the air guide element 8 a bend 16 and lying parallel to the air guide element 8 plates 14 have bends 15. These bends 15 and 16 have such a curvature ⁇ that they point substantially perpendicular to the surface of the upstream sheet-guiding cylinder 2. These bends have the function of vanes or pressure booster blades and serve to apply air to the sheets 12, 12 ', 12 "on the upstream sheet-guiding cylinder 2.
  • Fig. 2 shows the designated I. working cycle, in which the transfer drum 1 in the position shown with the blowing device 6, the blanket cylinder 24 and the downstream sheet-guiding cylinder 3 forms an air inlet chamber 28.
  • the conclusion downwards takes place through the sheet 12 or, if a sheet guiding device 11 is provided, also by this.
  • the blowing device 6 acts on this air inlet chamber 28 with freshly supplied, preferably dry and possibly heated air 34, wherein the air flow is directed to an action region 27 of the downstream sheet-guiding cylinder 3, on which a sheet 12 is located.
  • the air flow is preferably directed counter to the direction of the arc 12.
  • the supplied air 34 and trapped between the sheet 12 and the surface 5 sheet carrying air 35 meet, with a turbulence 36 takes place.
  • the air is thereby in the chamber volume compacted, resulting in high pressure forces on the sheet in the transfer area between the transfer drum 1 and the downstream sheet-guiding cylinder 3 and in the area up to the nip 50 result.
  • a good sheet support on the cylinder 3 is achieved.
  • a further drying of the sheet 12 take place, when the supplied air 34 is dry and / or heated air.
  • Fig. 3 shows the transfer drum 1 in a position after another rotation, which corresponds to the previously described working stroke II.
  • the air inlet chamber 28 is opened to an air outlet chamber 29, whereby a part of the air of the air inlet chamber 28 flows toward the air outlet chamber 29 toward.
  • This outflowing air 49 is conducted by means of the air guiding device 13 onto an action region 26 of the upstream sheet-guiding cylinder 2, in order to produce a good guidance of the sheet 12 "there.”
  • This sheet 12 " is likewise provided with a gripper row not shown in FIG fixed and is backwards by the exhaust air 33, which flows through the air outlet channel 18, stretched and pressed.
  • the transfer drum 1 has completed a further rotation and shows above the previously with III.
  • the undermined sheet 12 leaves the air inlet chamber 28 in the direction of the pressure nip 50, and the supplied air 34 of the blowing device 6 and mixed with her bow-carrying air 35 leave as outgoing air 49 the Air inlet chamber 28 in the direction of Heilauslrawhunt 29.
  • a first partial flow 31 which forms as Bogentragluft 35 between the sheet 12 "and the drum 1 forms a second partial stream 32 is through the louver 13 for blowing the still on the upstream sheet-guiding cylinder 2 located part of the sheet 12 "steered.
  • Fig. 5 shows a further rotation of the transfer drum 1, through which the first partial flow 31 is reinforced to form the sheet carrying air 35 in the formation of the first partial flow 31 and the second partial flow 32 enters an advantageous air distribution, since the dryer air has a higher density and the first partial flow 31 forms the sheet carrying air 35.
  • the moist air forms the second partial stream 32, which serves to blow out the sheet 12 "and is then removed as exhaust air 33. Since the sheet 12" still has a high level of moisture on the upstream sheet-guiding cylinder 2, the air of the second partial stream 32 is still It is of great advantage that the air forms a counterflow region 44 with respect to the movement of the sheet 12 ", whereby a high drying effect is achieved.
  • the exhaust air 33 meets the Schleppströmung 37 of the upstream sheet-guiding cylinder 2. The clash again results in an increase in pressure and pressing the sheet 12 ", then the exhaust air 33 leaves the machine.
  • the air of the first partial flow 31 is located in a Bogentraghunt 30, which is formed by the sheet 12 'and the surface 5, in which it serves as Bogentrag Kunststoff 35 for a secure guidance of the sheet 12'.
  • a further drying of the sheet 12 ' is achieved, since it is in the sheet carrying air 35 largely the above-described supplied air 34 with high dryness.
  • the compressed in the closed chamber 30 air also has vibration-damping influences on the bow, as it must compress the compressed air during movements. This stabilizes the sheet and achieves non-contact sheet travel.
  • the sheet supporting chamber 30 remains closed even during the further rotation in the drawn in Fig. 4 position of the transfer drum 1, whereby the supporting effect of the compressed air is maintained and the bow end is performed safely.
  • Fig. 6 shows a fourth embodiment of the sheet guiding system.
  • an additional blowing device 17 is arranged below the air guide element 8 between the movement path 7 of the gripper rows 4 and the upstream sheet-guiding cylinder 2.
  • This blowing device 17 is aligned in the direction of the sheet-guiding cylinder 2 and may for example consist of a series of transverse fans, which give the overflowing air an additional pressure increase. It can take the place of the louver 13 or blow with such cooperating the sheet 12 'on the upstream sheet-guiding cylinder 2.
  • the blowing device 17 cooperates with metal sheets lying parallel to the air guide element 14, which have a bend 15.
  • the air guide 8 also has such a bend 16.
  • the exhaust air 33 flows through the air outlet channel 18, to which a dryer 19 is arranged. Thereafter, the exhaust air 33 passes to an air outlet 21 which is formed by openings 23 of the tread plate 22.
  • the openings 23 are formed as a grid.
  • an air inlet 20 is provided in the tread plate 22, passes through the supplied air 34 to the blowing device 6. Also, the air inlet 20 is formed as a grid.
  • the air guide element 8 is formed by the foot plate 22, that is, the air outlet opening 10 shown in FIG. 1 is provided directly in the foot plate 22 and arranged in this, the blowing device 6 is.
  • FIG. 7 shows a fourth exemplary embodiment, in which at least part of the air emerging from the air outlet opening 10 is fed to the blowing device 6 in order to produce a circulation air guide 38.
  • Fig. 8 is a graph showing the change in the humidity 41 of the sheet 12, 12 ', 12 "and the relative humidity 42.
  • the settlement of the web passed through the sheet 12 and in the vertical is the moisture 8.2 to 8.5 show the respective positions which correspond to those of Figures 2 to 5.
  • Figure 8.2 shows the position after the transfer of a sheet 12 to the transfer drum 1 (working cycle III.), in which the air streams are divided into a first partial flow 31 and a second partial flow 32.
  • Air is applied to the arc 12 in the counterflow region 44 of Fig. 8, ie the air flows in the direction opposite to the sheet transport direction, the second partial flow 32 becoming exhaust air after this blowing 33 and the first partial flow 31 with lower humidity to the sheet carrying air 35.
EP96117740A 1995-12-09 1996-11-06 Bogenführsystem für eine Druckmaschine Expired - Lifetime EP0778131B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546046 1995-12-09
DE19546046A DE19546046A1 (de) 1995-12-09 1995-12-09 Bogenführsystem für eine Druckmaschine

Publications (3)

Publication Number Publication Date
EP0778131A1 EP0778131A1 (de) 1997-06-11
EP0778131B1 EP0778131B1 (de) 1999-01-27
EP0778131B2 true EP0778131B2 (de) 2006-05-17

Family

ID=7779702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117740A Expired - Lifetime EP0778131B2 (de) 1995-12-09 1996-11-06 Bogenführsystem für eine Druckmaschine

Country Status (5)

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US (1) US5787810A (ja)
EP (1) EP0778131B2 (ja)
JP (1) JP3936763B2 (ja)
AT (1) ATE176195T1 (ja)
DE (2) DE19546046A1 (ja)

Families Citing this family (17)

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DE19602514C1 (de) * 1996-01-25 1997-04-03 Heidelberger Druckmasch Ag Bogenleitvorrichtung mit einem gekühlten Bogenleitblech
DE19713361B4 (de) * 1997-03-29 2007-12-27 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum abschmierfreien Führen eines bedruckten Bogens auf einem bogenführenden Zylinder einer Druckmaschine, insbesondere auf einer Wendetrommel einer Bogenrotations-Offsetdruckmaschine, im Schöndruckbetrieb
DE29720989U1 (de) * 1997-11-27 1998-01-08 Roland Man Druckmasch Bogenführungseinrichtung mit einer Leitfläche in einer Druckmaschine
DE29901402U1 (de) * 1998-01-27 1999-05-12 Demoore Howard W Zwischenstationäre Infrarotheizung
DE19940534B4 (de) * 1998-10-14 2009-09-03 Heidelberger Druckmaschinen Ag Druckmaschine mit einer Fingerschutzeinrichtung
DE10040519A1 (de) * 1999-09-20 2001-03-22 Heidelberger Druckmasch Ag Bogenleiteinrichtung für eine Bogendruckmaschine
DE19949412A1 (de) 1999-10-13 2001-04-19 Heidelberger Druckmasch Ag Einrichtung zum Wenden von Bogen in einer Bogenrotationsdruckmaschine
WO2001050734A2 (en) * 2000-01-06 2001-07-12 Qualcomm Incorporated Method and system for transparently determining call service options
DE10060557B4 (de) * 2000-12-06 2007-05-31 Man Roland Druckmaschinen Ag Bogenleiteinrichtung in einer Rotationsdruckmaschine
CA2392429C (en) * 2001-07-23 2006-10-10 Mitsubishi Heavy Industries, Ltd. Sheet-fed press and intermediate cylinder for sheet-fed press
DE10164255A1 (de) * 2001-12-27 2003-07-17 Heidelberger Druckmasch Ag Drei-Trommel-Wendeeinrichtung für bogenverarbeitende Maschine
DE10325622B4 (de) * 2003-06-06 2005-12-22 Eastman Kodak Company Bogenumlenkeinrichtung für eine Druckmaschine
JP2005125739A (ja) * 2003-10-27 2005-05-19 Heidelberger Druckmas Ag 乾燥機を備えた枚葉紙印刷機
CN1944048A (zh) * 2005-09-21 2007-04-11 海德堡印刷机械股份公司 用于输送页张的方法和用于执行该方法的装置
US9090053B1 (en) * 2009-03-03 2015-07-28 Bruce A. Franke Air dispenser for printing press
JP6016591B2 (ja) * 2012-11-22 2016-10-26 富士フイルム株式会社 画像形成装置
EP4059716A1 (de) * 2021-03-18 2022-09-21 Heidelberger Druckmaschinen AG Bogenführung

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DE2354418C3 (de) * 1973-10-31 1980-04-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenübergabetrommel für Druckmaschinen
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JPS58219058A (ja) * 1982-06-14 1983-12-20 Komori Printing Mach Co Ltd 反転機構付枚葉輪転印刷機
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Also Published As

Publication number Publication date
DE59601219D1 (de) 1999-03-11
ATE176195T1 (de) 1999-02-15
JPH09174813A (ja) 1997-07-08
DE19546046A1 (de) 1997-06-12
US5787810A (en) 1998-08-04
EP0778131A1 (de) 1997-06-11
EP0778131B1 (de) 1999-01-27
JP3936763B2 (ja) 2007-06-27

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