Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F31/00—Inking arrangements or devices
  • B41F31/15—Devices for moving vibrator-rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F7/00—Rotary lithographic machines
  • B41F7/20—Details
  • B41F7/24—Damping devices
  • B41F7/26—Damping devices using transfer rollers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S101/00—Printing
  • Y10S101/38—Means for axially reciprocating inking rollers

Definitions

• Roller of a printing machine with a device for generating an axial oscillation movement of the rotating roller
• the invention relates to a roller of a printing machine with a device for generating an axial oscillatory movement of the rotating roller according to the preamble of claim 1.
• the invention relates to such devices in the context of Verreibwalzen a dyeing or dampening unit of a printing press.
• the rotational drive of such rolls is usually carried out by frictional engagement with an adjacent roll or an adjacent cylinder, which is driven directly or indirectly via the machine drive.
• Verreibwalze From DE 196 03 765 A1 such a device for axially reciprocating a Verreibwalze is known, wherein an external power source is provided in particular in the form of a piston / cylinder unit for the reciprocation.
• the Verreibwalze may have in its interior two pressure chambers through the differential pressure, the reciprocating movement of the Verreibwalze.
• compressed air As a working medium in this case compressed air is provided, which is generated by an external compressor.
• DE 36 20 423 A1 describes various embodiments of drives for the axial movement of oscillating rollers.
• the roller is moved by means of a pressure medium system, wherein the pressure medium supply is arranged outside the roller.
• the axial movement is generated by means of a mechanical transmission.
• DE 10 2005 019 266 A1 discloses a drive for a paint roller of a printing press.
• the drive has a hydraulically actuated lifting cylinder, which shifts the roller oscillating in the axial direction.
• the associated pressure medium supply by means of a pump.
• the invention has for its object to provide a roller of a printing machine with a device for generating an axial oscillatory movement of the rotating roller.
• the drive energy can be derived in many ways from the rotation of the roller, in particular, for example, also by magnetic or electromagnetic means.
• the motor drive comprises a drive wheel, in particular arranged in the interior of the roller, which can be driven by the rotating roller and, in particular, can be in frictional or positive connection with it.
• the drive wheel is in drive connection with a cylindrical roller shell of the roller.
• the axial oscillatory movement could in principle be effected in a variety of ways, for example via an electromagnetic drive and a suitable transmission. However, it is preferred if the oscillatory movement can be effected by alternating supply of a working fluid in pressure chambers which are effective in respectively opposite axial direction.
• the pressure chambers can in this case be doubled acting cylinder may be formed, which is arranged in the interior of the roller, either as a separate component or defined for example by the inner walls of the roll shell.
• the motor drive comprises a pumping device which puts the working fluid under working pressure and which is connected to the drive wheel and thus actuated by the latter.
• This pump device is also preferably arranged in the interior of the roller.
• a switching valve is expediently provided, which is also preferably arranged in the interior of the roller.
• the motor drive can work in particular hydraulically or possibly also pneumatically.
• a reservoir for hydraulic fluid may be provided which is preferably also disposed in the interior of the roller and in particular may be in communication with the pump device via the changeover valve.
• a pneumatic drive in particular air can be used as the working fluid.
• the basic construction of the roller could be e.g. be such that the roller has a cylindrical roll shell which is rotatably mounted on a non-rotatable, but slidably mounted in the axial direction shaft.
• the structure is such that the roll has a cylindrical roll shell which is rotatable relative to a fixed shaft, the cylindrical roll shell in addition to a non-rotatably on the fixed shaft, but slidably mounted in the axial direction carriage along the fixed shaft and is slidably mounted ago.
• the arrangement of the individual drive components preferably within the roller so that the cylinder / piston arrangement acts between the shaft and the carriage, that the pump device together with the drive wheel and possibly together with reservoir are preferably mounted on the fixed shaft, but possibly also on the carriage, and that the switching valve is preferably arranged either on the fixed shaft or optionally also on the carriage such that the switching valve is switchable due to a relative movement between the fixed shaft and the carriage.
• the device according to the invention enables a compact and insensitive construction of a motor-driven distribution roller, which is inexpensive to produce and requires no external drive components.
• the risk of damage, in particular with regard to consequential damage due to a blocking roller is comparatively low and due to a pressure limiting of the pump device is an automatic overload protection.
• the invention provides increased flexibility, after variable Abreibhübe be reached by changing the stop for the switching valve.
• the optionally adjustable delivery rate of the pump device determines the Verreibfrequenz.
• the drive according to the invention can be easily adapted to different roller dimensions.
• FIG. 1 is a broken and partially schematized side view of a roller with an internal motor drive, wherein parts of the arrangement have been omitted for clarity of illustration, 2 shows the hydraulic diagram of the drive according to FIG. 1 in a schematic representation,
• Fig. 3 shows an embodiment of a pump within a roller
• Fig. 4 is a printing unit of a printing machine.
• the roller 01 of the invention for example, a Verreibwalze 01 of an inking unit or dampening unit of a printing press, not shown, comprising a fixed shaft 02 with an axis 03.
• a carriage 04 is by means of suitable bearings 05 on the shaft 02 in the direction of Axis 03 displaceable, but guided against rotation.
• the anti-rotation of the guide is indicated in Figure 1 by a bolt 06 fixed in the shaft 02, which engages in a slot 07 or a slot 07 in the carriage 04.
• the anti-rotation could be ensured in other ways, e.g. via a suitable, e.g. polygonal cross section of the shaft 02 and a correspondingly adapted guide cross section of the carriage 04 and the bearing 05th
• a cylindrical roller shell 08 of the roller 01 is supported by bearings 09 on the carriage 04 for free rotation in both directions of rotation.
• the roller shell 08 of the roller 01 is thus on the one hand rotatable about the axis 03 and on the other hand slidably mounted along the axis 03.
• the roller 01 or Verreibwalze 01 on an adjacent, during operation rotatably driven roller or a rotationally driven cylinder (not shown) abut and be set by this or this in rotation.
• a device to be described below is provided to move the roller 01 during its rotation back and forth, so the roller 01 at the same time to convey an axial oscillatory motion, for example, to a uniform To achieve distribution of printing ink.
• a pump device 1 for this purpose, on the stationary or stationary shaft 02, a pump device 1 1, namely a pump 1 1, in particular a miniature pump 1 1 attached to hydraulic fluid, which is driven by a drive wheel 12, which with its circumference on the inside of the roll shell 08th is present and frictionally driven by this.
• the pump 1 1 promotes regardless of the direction of rotation of the drive wheel 12 and the rotational direction of the roll shell 08.
• the reference numeral 13 denotes a reservoir for hydraulic fluid, which is also mounted on the fixed shaft 02 and with the pump 1 1 a common housing ( Fig. 1) may have or outside of the housing, for. B. in a shaft (02) may be arranged (Fig. 3).
• a cylinder / piston arrangement 14 comprises a double-acting cylinder 16 with two pressure chambers 17 and 18, which are separated from each other by the piston 19 and each have a connection for a hydraulic line 32 and 33, cf. Fig. 2.
• the one end of the cylinder 16 is connected via an angular support 22 with the fixed shaft 02, while at the opposite end of the cylinder 16, the piston 19 associated piston rod 21 exits from the cylinder 16 and is connected to the carriage 04.
• the cylinder / piston assembly 14 is arranged so that the arrangement of the cylinder / piston assembly 14, the pump device 1 1 generates an oscillating movement in the axial direction of a longitudinal axis of the roller 01.
• Directional valve 23 is formed and includes a central displaceable switching portion 24 which is adjustable between two functional positions and for this purpose during the axial displacement of the carriage 04, ie at the respective end portions of the axial displacement, with its one projecting end 26 with a stop surface 28th one attached to the carriage 04 stop angle 29 or with its other projecting end 27 with an opposite stop surface 31 of the carriage 04 comes into engagement.
• the switching valve 23 may be formed as a pressure valve, which is switchable in dependence of the pressure in the chambers 17, 18 of the cylinder 16 existing pressure.
• the switching valve 23 on the one hand three and on the other hand two inputs which are connected via the two channels of the movable switching portion 24 by shifting the switching portion 24 in different combinations with each other, namely such that depending on the position of the switching portion 24 via the pump 1 1 either, as shown, the pressure chamber 18 via the hydraulic lines 34, 33 or, in the other, not shown position of the switching portion 24, the pressure chamber 17 is acted upon via the hydraulic line 34 and 32 with hydraulic fluid and the other pressure chamber 17 and 18 via the hydraulic lines 32 and 36 (as shown) and 33, 37 and 36 (in the other, not shown position) is connected to the reservoir 13.
• the switching valve 23 is thus in the possibly defined by suitable stops and possibly also adjustable end positions of the carriage 04, the working direction of the cylinder / piston assembly 14 is reversed.
• a detent be provided for example by means of a ball, by which a neutral position is excluded, in which the two working directions block each other.
• a pneumatic system is provided instead of the described hydraulic system, in particular air can be used as the working fluid.
• a reservoir for the working fluid is unnecessary in this case.
• a compressed air supply possibly via a plug connection from the outside by corresponding holes in the fixed shaft 02 through done.
• the pump device 11 can in principle also be mounted externally, ie for example outside the roller shell 08 on the stationary shaft 02.
• the supply lines can in this case be guided through the stationary shaft 02 into the interior of the roller 01 become.
• the cylinder 16 could be mounted externally, as well as the reservoir 13 and / or the changeover valve 23.
• An external arrangement of these components may allow their common use for multiple rolls. Also is in an external arrangement, any adjustment or subsequent adjustment of operating parameters easier, for example, the adjustment of the friction frequency. Also, a control of the friction frequency is independent of the engine speed possible.
• the pump 11 is preferably designed as an axial piston pump which has at least one piston 38.
• a plurality of pistons 38 are arranged rotationally symmetrical to the shaft 02 of the roller 01.
• a longitudinal axis of the piston 38 is preferably arranged parallel to the shaft 02 or the roller 01.
• the piston housing of the pump 1 1 is fixed, preferably frictionally engaged, in particular by means of a clamping set with the shaft 02.
• a preferably circumferential contact surface 39 is provided, whose plane with the longitudinal axis of the shaft 02 has an opening angle ⁇ not equal to 90 ° and not equal to 180 °.
• the contact surface 39 is inclined to a vertical plane 41 with z. B. an opening angle ß of 3 ° to 20 °.
• This contact surface 39 rotates with the roll shell 08 and is preferably frictionally z. B. connected by means of a clamping set with the roll shell 08.
• the roller 01 may be formed, for example, as a directly cooperating with an inking roller 42 friction roller 43.
• the inking roller 42 and / or the dampening roller 46 is directly in contact with a forme cylinder 44.
• the roller 01 may be formed as an inking roller 42 or dampening roller 46.
• the drive of the roller 01, in particular of the roll shell 08 takes place exclusively preferably frictionally by a roller directly cooperating with the roller 01 or a forme cylinder 44.
• the drive of the pump 1 1 is outside the roller 01 therefore exclusively by a frictional drive through the direct cooperating roller or the directly cooperating form cylinder 44th

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Inking, Control Or Cleaning Of Printing Machines (AREA)
• Printing Methods (AREA)
• Friction Gearing (AREA)
• Rotary Presses (AREA)
• Rolls And Other Rotary Bodies (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38650208

Family Applications (1)

Country Status (6)

Families Citing this family (6)

Family Cites Families (18)

• 2006
  • 2006-05-10 DE DE102006021749A patent/DE102006021749A1/de not_active Withdrawn
• 2007
  • 2007-04-27 DE DE502007001503T patent/DE502007001503D1/de active Active
  • 2007-04-27 US US12/226,055 patent/US8001894B2/en not_active Expired - Fee Related
  • 2007-04-27 WO PCT/EP2007/054143 patent/WO2007128709A2/fr not_active Ceased
  • 2007-04-27 CN CN200780015414XA patent/CN101432140B/zh not_active Expired - Fee Related
  • 2007-04-27 AT AT07728598T patent/ATE442256T1/de active
  • 2007-04-27 EP EP07728598A patent/EP2015938B1/fr not_active Not-in-force

Non-Patent Citations (1)

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