EP3582968B1 - Procédé d'impression de corps creux - Google Patents

Procédé d'impression de corps creux Download PDF

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Publication number
EP3582968B1
EP3582968B1 EP18702991.3A EP18702991A EP3582968B1 EP 3582968 B1 EP3582968 B1 EP 3582968B1 EP 18702991 A EP18702991 A EP 18702991A EP 3582968 B1 EP3582968 B1 EP 3582968B1
Authority
EP
European Patent Office
Prior art keywords
printing
plate cylinder
plate
inking
ink
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.)
Active
Application number
EP18702991.3A
Other languages
German (de)
English (en)
Other versions
EP3582968B8 (fr
EP3582968A1 (fr
Inventor
Stephan Behnke
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.)
KBA Metalprint GmbH and Co KG
Original Assignee
KBA Metalprint GmbH and Co KG
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 KBA Metalprint GmbH and Co KG filed Critical KBA Metalprint GmbH and Co KG
Publication of EP3582968A1 publication Critical patent/EP3582968A1/fr
Publication of EP3582968B1 publication Critical patent/EP3582968B1/fr
Application granted granted Critical
Publication of EP3582968B8 publication Critical patent/EP3582968B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/004—Electric or hydraulic features of drives
    • B41F13/0045—Electric driving devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/002—Supports of workpieces in machines for printing on hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/08—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces
    • B41F17/14—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length
    • B41F17/20—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors
    • B41F17/22—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors by rolling contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/007—Apparatus or machines for carrying out printing operations combined with other operations with selective printing mechanisms, e.g. ink-jet or thermal printers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/02—Magnetic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/06—Troughs or like reservoirs with immersed or partly immersed, rollers or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/06—Lithographic printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B41M1/16—Multicolour printing using different inks which flow into one another to produce iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0082—Digital printing on bodies of particular shapes
    • B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/50—Printing presses for particular purposes
    • B41P2217/60—Means for supporting the articles
    • B41P2217/62—Means for supporting the articles externally, e.g. for bottles

Definitions

  • the invention relates to a method for printing hollow bodies according to claim 1.
  • Such as B. from the WO 2012/148576 A1 is known, in the packaging industry in a device for decorating hollow bodies each having a cylindrical outer surface, a plurality of printing units are mostly used. Each of these printing units transfers a printing ink to a printing blanket used by these printing units. The outer surface of the hollow body in question is then moved by a relative movement between the outer surface of the hollow body in question and the previously in particular multi-colored printing blanket, in particular by rolling the outer surface of the hollow body in question on this printing blanket, with a z. B. decorated multicolored print motif.
  • Such a device for printing or decorating hollow bodies is e.g. B. used in connection with a system usually having several workstations for the production of such hollow bodies, the printing or decoration of the hollow bodies being carried out by a printing process, which is why these hollow bodies can generally also be referred to as printed products.
  • the hollow bodies to be printed are in a mass production with z. B. several hundred or even a few thousand pieces per minute, e.g. B. manufactured between 1,500 and 3,000 pieces per minute.
  • Such hollow bodies are z. B. made of metal, in particular steel or aluminum, or made of a plastic.
  • Such hollow bodies made of metal are z. B. used as beverage cans or as aerosol cans.
  • Such hollow bodies made of plastic are z. B. produced in the form of thermoplastic moldings and z. B. as a cup for packaging z. B. of liquid or pasty foods, used in particular by dairy products or beverages.
  • the respective hollow body can, however, also be a round tube body made either of plastic or aluminum, whereby a tube is understood to be an elongated, solid, but malleable container which is intended to be filled with a particularly paste-like substance.
  • Tubes made of aluminum are z. B. manufactured in a reverse extrusion process.
  • Tubes made of plastic are z. B. each produced as seamless tubes by extrusion.
  • Another type of hollow bodies to be printed in an aforementioned device can be preferably cylindrical containers or vessels made of glass, e.g. B. bottles or flacons.
  • Beverage cans are preferably made of aluminum and are i. d.
  • a circular base together with a preferably straight cylinder jacket each consist of a single workpiece, i. H. from a so-called slug or from a round blank, d. H. a circular disc, in a forming process, e.g. B. in a cold extrusion process or in a tensile compression forming process, preferably by deep drawing, in particular by ironing deep drawing, to form a hollow body open on one side, d. H. can be manufactured into a so-called raw can and in a final production step a circular lid is placed on the cylinder jacket and connected to the cylinder jacket in an airtight manner by flanging.
  • Tinplate cans are another type of can.
  • Tinplate is a tin-plated steel sheet.
  • the thickness of the steel sheet is e.g. B. 0.15 mm to 0.49 mm, the thickness of the tin layer z. B. 0.2 microns to 0.8 microns, the tin coating is used for corrosion protection.
  • Tinplate cans are so-called three-part cans.
  • a rectangular strip of sheet steel is bent into a preferably straight cylinder jacket, the ends of this strip bent to a cylinder jacket being welded in a butt joint.
  • a circular base and a circular cover are made placed on the cylinder jacket and flanged the edges.
  • z. B. all three parts, ie the cylinder jacket, the bottom and the cover, preferably a wave profile.
  • An aerosol can also known as a spray can or spray can, is a metal can for spraying liquids.
  • the liquid filled is under pressure, the propellant gas used to dispense the liquid in question from the can in question, for. B. propane, butane, dimethyl ether or mixtures thereof or compressed air or nitrogen is used.
  • WO 2012/148576 A1 describes a device for decorating cans, an arrangement of several printing units, each with one inking unit, being provided for the multicolored decoration of a plurality of cans, each of the inking units belonging to one of the printing units each having an ink fountain for providing printing ink, in each ink fountain
  • one ink fountain roller is provided for receiving the printing ink from the respective ink fountain
  • each inking unit having an inking ductor
  • the inking fountain in each case receiving printing ink from the respective inking fountain roller
  • several oscillating inking rollers in a roller train following the respective inking fountain in the relevant inking unit and a plurality of ink transfer rollers each cooperating with at least one of the ink distributor rollers are provided, a plate cylinder with at least one printing plate being provided for each inking unit, with the respective plate cylinder only a single inking roller cooperates to apply the printing ink.
  • the DE 10 2014 213 812 B3 a method for printing hollow bodies according to the preamble of claim 1 can be found in which printing ink is applied to the hollow bodies from one of the printing blankets arranged one behind the other on the circumference of a segmented wheel rotating about its axis is transferred, in which at least two plate cylinders arranged one after the other in the direction of rotation of the segment wheel are used, in which a first printing ink applied to the printing plate by a first inking unit set on a first plate cylinder is applied to a first printing blanket of the printing blankets arranged on the circumference of the segment wheel is transmitted.
  • the post-published DE 10 2016 201 140 A1 discloses a method for printing hollow bodies in which printing ink is applied to each of the hollow bodies by one of the one behind the other on the circumference of a segmented wheel rotating about its axis arranged printing blankets is transferred, in which at least two plate cylinders arranged one after the other in the direction of rotation of the segment wheel are used, each carrying a printing plate.
  • WO 2004/109581 A2 is a device for performing a non-contact digital printing process, e.g. B.
  • an inkjet printing process is known to individually print round objects, in particular two-part cans, without using a printing blanket, preferably several print heads are provided, each printing a single ink.
  • a short inking unit for a printing machine containing a printing forme cylinder, an inking roller that interacts with the printing forme cylinder and an anilox roller contacting the inking roller, to which a device for ink supply is assigned, with at least one leveling roller between the location of the ink supply and the contact gap between the anilox roller and the Inking roller, based on the direction of rotation of the anilox roller, is arranged, the device for ink supply being designed as a chamber doctor blade.
  • a printing machine which comprises at least one printing form, a dampening unit for dampening the printing form with a dampening solution, an inking unit for inking the printing form with a printing ink and a dehumidifying device with a heating roller (temperature control roller) for reducing a proportion of the dampening solution conveyed together with the printing ink , the inking unit being designed as a lifterless short inking unit, with an inking unit roller of the inking unit having a first unwinding contact point at which the inking unit roller is in unwinding contact with the heating roller, the inking unit roller having a second unwinding contact point and a shortest conveying path of the printing ink from the inking unit roller to Printing form is given by at most one intermediate roller.
  • an inking unit for offset printing machines for printing sheets or webs with a plate cylinder which receives the required color from a maximum of two inking rollers with an elastic surface, which interact with an inking cylinder to which the ink is fed via an ink supply system that produces a continuous ink film,
  • the inking cylinder is followed by an inking roller with almost the same diameter as the plate cylinder, the inking cylinder being assigned a dampening unit with at least one roller that transfers the dampening solution and the transfer of the dampening solution to the inking cylinder in the direction of rotation of the same after the inking and before its contact point with the Inking roller takes place.
  • a method for driving a printing unit with a short inking unit in a processing machine with an anilox roller and an associated squeegee device and an inking roller arranged downstream of the anilox roller is known, which is followed by a plate / forme cylinder in the ink flow direction, the plate / forme cylinder with a blanket cylinder and the
  • the blanket cylinder is in operative connection with an impression cylinder that carries the printing material, the anilox roller being driven by an individual drive, with the main drive providing a drive to a drive wheel of the printing cylinder and a drive wheel of the blanket cylinder and a second and first drive wheel of the plate / Form cylinder and a drive wheel of the inking roller and a drive wheel of the anilox roller is fed, the individual drive of the anilox roller is inactive, and the drive connection to the main drive between the first drive wheel and the second drive in the setup mode ebsrad of the plate / forme cylinder is separated, the individual drive of the anilox roller is activate
  • a device for filling recesses of a cylinder of a printing machine with a liquid is known, with at least two squeegee devices for filling recesses of the cylinder with the liquid being arranged on the cylinder, one application device connected to a conveying system for the liquid and one of these in the direction of rotation of the cylinder are provided downstream working doctor blades, wherein the doctor blades are attached to a beam, wherein the squeegee liquid is drained to a collecting pan.
  • An anilox printing unit which has an inking roller and an anilox roller as inking rollers, the anilox roller being mounted on pivot levers, the anilox roller and the inking roller each having bearer rings, one of which is arranged to press the bearer rings of one against the bearer rings of the other inking roller Has device springs to compensate for manufacturing tolerance-related diameter differences.
  • a device for printing a respective outer surface of hollow bodies, with a transport device transporting the hollow bodies to be printed around an axis of rotation being provided, with several printing units being provided, each hollow body to be printed being transportable with the transport device into a printing area of at least one of the printing units , wherein at least one of the printing units has a printing forme cylinder and an inking unit with a single inking roller.
  • the invention is based on the object of creating a method for printing hollow bodies with which what is known as iris printing is possible.
  • Alternative printing methods are e.g. B. a screen printing process or an offset printing process or a printing formless digital printing process.
  • the invention is described below by way of example in connection with a letterpress process.
  • a printing block is arranged as a printing form on a surface of a plate cylinder.
  • the printing block ready for use for the printing process is a printing form with a printing relief, this printing relief mirroring the printing image provided for the printing process, with only the printing relief being involved in the transfer of the printing ink supplied to the plate cylinder by the inking unit onto the printing blanket in a trouble-free printing operation.
  • the printing form or the printing cliché has a plate-shaped, preferably flexible support of finite length z. B. from one Sheet steel on, with a particularly flexible pressure body is arranged on this carrier. At least the opposite ends of the carrier in the circumferential direction of the plate cylinder can, for. B.
  • the carrier of the printing form or the printing plate has a thickness in the range of, for. B. 0.2 mm to 0.3 mm.
  • the printing block including its carrier has a total thickness in the range of, for. B. 0.7 mm to 1.0 mm, preferably about 0.8 mm.
  • the pressure body is z. B. formed from a plastic. The printing body is used for the production of the printing cliché z. B. exposed with a negative film reproducing the print image, with unexposed areas then from the printing body z. B. can be removed by washing or by means of a laser.
  • a device for printing or for decorating hollow bodies in particular each having a preferably cylindrical outer surface, preferably has several, e.g. B. eight or ten or even more printing units - also called printing stations -, at least one of these printing units, in the preferred embodiment all of these printing units each having a rotatable printing forme cylinder, in particular a printing forme cylinder designed as a plate cylinder.
  • the printing units or printing stations and possibly also the printing forme cylinders in this device are each stored in a frame and can be used in the same printing process to form a multicolored printing motif on the same hollow body according to the number of printing units or printing forme cylinders involved.
  • the mounting of the printing forme cylinder or plate cylinder is preferably designed as a floating mounting, the respective printing forme cylinder or plate cylinder on one of its end faces, for. B. is mounted on a preferably conical pin.
  • the carrier of the Printing clichés completely or at least largely, in particular more than 80%, spans the circumference of the plate cylinder in question.
  • a length of the printing body of the printing block directed in the circumferential direction of the plate cylinder in question is preferably made shorter than the circumference of the plate cylinder in question.
  • the printing forme or the printing cliché is arranged or at least can be arranged by means of its carrier in particular magnetically on the outer surface of each plate cylinder, ie the printing forme or the printing cliché is preferably held there magnetically, ie by means of a magnetic holding force.
  • the device for printing or decorating hollow bodies each preferably having a cylindrical outer surface, at least one of the printing units or several of these printing units are each designed as a printing unit that prints without printing form in a digital printing process, such a printing unit in particular has at least one inkjet print head or a laser.
  • each printing forme cylinder or plate cylinder has a diameter in the range between 100 mm and 150 mm, in particular between 120 mm and 130 mm, with an axial length of the respective printing forme cylinder or plate cylinder.
  • Plate cylinder each z. B. between 200 mm and 250 mm, in particular between 200 mm and 220 mm.
  • the printing block to be arranged on the lateral surface of the plate cylinder in question has a width in the axial direction of the plate cylinder in question in the range from 150 mm to 200 mm, preferably approximately 175 mm.
  • Each of the e.g. B. designed as a plate cylinder printing forme cylinder transfers with its printing forme or with its printing cliché in each case a certain printing ink on a printing blanket.
  • the printing inks used are usually premixed, in particular customer-specific special colors which, with regard to their respective printability, are matched in a special way to the material of the hollow body to be printed, depending on whether a surface z. B. made of aluminum, a tinplate or a plastic is printed.
  • a printing ink is provided from the printing form or the printing cliché to the surface of the hollow body in question transferring device.
  • This ink-transferring device is preferably designed as a segment wheel rotating about a particularly horizontal axis, wherein on the periphery of this segment wheel, ie on its periphery one behind the other, preferably several, z. B. eight, ten, twelve or even more printing blankets are arranged or at least can be arranged.
  • the printing ink-transferring device can, depending on the printing process used, also be designed as a decoration drum or as a blanket cylinder or as a transfer cylinder, each of which can be rotated around an axis of rotation at least during printing.
  • the arrangement of the printing blankets on the circumference of the segmented wheel has so far taken place in that the printing blankets on the circumference of the segmented wheel are each z.
  • B. are attached by a material connection, preferably by an adhesive.
  • the preferably several printing forme cylinders or plate cylinders are each adjusted radially or at least adjustable against the printing blankets arranged on the circumference of the relevant segmented wheel.
  • cylindrical outer surface having hollow bodies is arranged on the circumference of the segment wheel one behind the other a larger number of blankets than are provided in each case radially adjusted or at least adjustable printing forme cylinders or plate cylinders on the segment wheel.
  • the preferably carousel-like printing ink transferring device in particular the segment wheel has a diameter of, for. B. 1,400 mm to 1,600 mm, preferably about 1,520 mm to 1,525 mm, and has at z. B. eight associated printing forme cylinders or plate cylinders on its circumference one behind the other z. B. twelve printing blankets.
  • the surface of each printing plate is preferably designed with a greater hardness than the hardness of the respective surface of the printing blankets.
  • the surface of the printing blankets is preferably planar, that is to say without profiling.
  • the respective printing forms of these printing forme cylinders or the respective printing blocks of these plate cylinders roll on the printing blankets moved by the segmented wheel, with the printing blocks at least their printing relief z. B. 0.2 mm to 0.25 mm deep into the respective printing blanket and thereby produce a flattening extending in the axial direction of the segment wheel in the respective printing blanket, ie a roller strip.
  • An intensity of the flattening is z. B. before or at the beginning of a printing process z. B. by means of a remote control by setting a contact pressure exerted by the relevant printing forme cylinder or plate cylinder on the relevant printing blanket of the segmented wheel or is set in such a way.
  • the hollow bodies to be printed here for example. B. the two-part cans to be printed, z. B. by means of a transport device that transports the hollow bodies to be printed, preferably along at least part of a circular path, ie an arc of a circle around an axis of rotation, preferably by means of a feed wheel, in particular by means of a mandrel wheel continuously or in one set cycle is brought up to at least one of the printing units belonging to the device for printing in each case on a lateral surface of hollow bodies and is thus transported into a printing area of at least one of these printing units.
  • the hollow body to be printed by means of the z. B. designed as a feed wheel transport device to at least one of the z. B.
  • segmented printing blankets arranged on the segmented printing blankets, or the hollow bodies to be printed are each directly and immediately, ie without the aid of a z.
  • B. designed as a segment wheel printing ink-transmitting device in the respective printing area of at least one of these printing units transported, which is the case when the printing unit in question in a direct printing process, for. B. prints in an inkjet printing process.
  • the segment wheel likewise rotating about a preferably horizontal axis feed wheel or mandrel wheel has concentrically to its circumferential line in preferably equidistant distribution several, z. B. 24 or 36 holders z. B. each in the form of a mandrel protruding from an end face of the mandrel wheel or a spindle, each holder holding one of the hollow bodies to be printed or at least being able to hold it.
  • a transport device designed as a mandrel wheel is sometimes also referred to as a rotary table with spindles.
  • a mandrel wheel is z. B. in the EP 1 165 318 A1 described.
  • each mandrel is briefly referred to as a mandrel.
  • a longitudinal axis of each mandrel is directed parallel to the axis of the mandrel wheel.
  • each z. B. designed as a two-part box to be printed hollow bodies
  • each of these hollow bodies z. B. by means of a conveyor, e.g. B. a belt conveyor to which z. B. designed as a mandrel wheel transport device and there at a transfer station z. B.
  • each mandrel is z. B. rotatable around its respective longitudinal axis by means of a motor and in particular adjustable to a certain circumferential speed, so that each hollow body held by a mandrel to be printed can be rotated in addition to the rotation of the mandrel wheel by an independently executed or at least executable rotation by the mandrel.
  • the hollow body to be imprinted is slipped onto one of the mandrels of the mandrel wheel preferably during a standstill phase of the relevant mandrel, the relevant mandrel not rotating about its own longitudinal axis during its standstill phase.
  • the occupancy of each mandrel with a hollow body to be printed is preferably checked, e.g. B. contactless with a sensor. If there is no assignment of a mandrel with a hollow body to be printed, the mandrel wheel z. B. moved in such a way that contact of the free mandrel in question with a blanket of the segment wheel is reliably avoided.
  • Two-part cans to be printed are z. B. to the mandrel wheel in a machining station upstream of the mandrel wheel, z. B. deep-drawn from a round blank. In a further processing station, the edge of each two-piece can is trimmed on its open end.
  • Each two-part box is z. B. washed, especially the inside washed out, if necessary, the inner wall and the bottom of the two-piece can in question are also painted. At least the outer surface of each two-part box is z. B. primed, especially with a white primer. After printing on their outer surface, each two-part can is from its respective holder z. B. on the mandrel wheel z. B.
  • the printed two-part cans go through in particular a dryer, e.g. B. a hot air dryer in order to cure the at least one printing ink applied to its respective lateral surface.
  • the printing process for printing in particular the respective outer surface of z. B. held on the mandrel wheel hollow bodies, in particular two-part cans begins with all of the printing inks required for the print image to be printed on the respective outer surface of the hollow body, e.g. B. from the respective printing block of z. B. on the segmented wheel plate cylinder can be applied to the same by one of the printing blankets arranged on the circumference of the segmented wheel.
  • the relevant printing blanket colored with all the necessary printing inks then transfers these printing inks simultaneously during a single rotation of the hollow body to be printed on one of the mandrels of the mandrel wheel around its longitudinal axis to the circumferential surface of this hollow body in a touch contact between the printing blanket and the surface of the hollow body to be printed.
  • the respective peripheral speeds of the hollow body and printing blanket or segment wheel are therefore synchronized with one another, the z. B. held on one of the mandrels of the mandrel wheel to be printed hollow body z. B. starting from its first contact point with the relevant Printing blanket while rolling its outer surface on a route from the first z. B. 50 mm from the circumferential length of the blanket from its standstill in particular until reaching the circumferential speed z. B. the segment wheel is accelerated accordingly.
  • the segment wheel carrying the printing blanket in question is therefore the z. B. on the respective mandrel of the mandrel wheel to be set circumferential speed.
  • the circumferential speed of the printing forme cylinder carrying the printing form or of the plate cylinder carrying the printing block is or is preferably depending on the peripheral speed, for. B. set the segment wheel.
  • the mandrel wheel and the segment wheel can, for. B. driven by the same central machine drive and optionally mechanically z. B. coupled to one another via a transmission.
  • the mandrel wheel and the segment wheel are each individually driven by their own drive and their respective rotational behavior is controlled or regulated by a control unit.
  • FIG. 1 shows in a simplified schematic representation and by way of example a generic device for printing or for decorating hollow bodies 01, in particular each having a preferably cylindrical outer surface, e.g. B. two-part cans 01, this hollow body 01 with a conveyor z. B. sequentially the z. B. supplied as a rotating or at least rotatable feed wheel, in particular designed as a mandrel wheel 02 transport device and held there individually on a holder on this transport device.
  • this transport device is preferably designed as a mandrel wheel 02.
  • a printing ink-transmitting device e.g. B. a rotating or at least rotatable segment wheel 03 together, along whose or the extent of which several printing blankets are arranged one behind the other.
  • a plurality of printing forme cylinders are provided along its circumference that are radially adjusted or at least adjustable against this segment wheel 03, with a printing forme, in particular a printing block, being arranged on the respective outer surface of this printing forme cylinder or plate cylinder 04, with this printing block is particularly suitable for the execution of a letterpress process.
  • a specific printing ink is supplied to each of the printing forme cylinders or plate cylinders 04 by means of an inking unit 06 in order to color its printing forme or printing block.
  • the printing form cylinders are each designed as a plate cylinder 04 carrying at least one printing block.
  • Fig. 2 and 3 show in a simplified schematic representation some details of the inking unit 06 interacting with a plate cylinder 04, which z. B. for use in the in Fig. 1
  • the device shown for printing or for decoration, in particular, of hollow bodies 01 each having a preferably cylindrical outer surface is provided.
  • the inking unit 06 proposed here advantageously has a very short, in particular two-roller, roller train consisting of only a few, preferably a maximum of five rollers, for the ink transport from an ink reservoir to the plate cylinder 04 in question. In the case of the two-roller roller train, this roller train consists only of a single inking roller 07 and an anilox roller 08.
  • FIG. 2 shows an example of a (short) inking unit 06 with a two-roller roller train in a first operating position in which the inking roller 07 and the anilox roller 08 are positioned against one another, the inking roller 07 is positioned against the plate cylinder 04 and the plate cylinder 04 is also positioned radially against the printing ink from the plate cylinder 04 on the outer surface of the respective hollow body 01 transmitting device, in particular on the segment gear 03 are employed.
  • Fig. 3 shows, however, for that in the Fig.
  • Inking unit 06 has a second operating position in which the inking roller 07 and the anilox roller 08 are switched off from one another, the inking roller 07 is switched off from the plate cylinder 04 and the plate cylinder 04 is also switched off from the device transferring the printing ink, in particular from the segmented wheel 03.
  • the on and off mechanism will be discussed later.
  • the plate cylinder 04 and the anilox roller 08 are z. B. each independently from a motor 11; 12 driven in rotation, especially in the case of the one preferably used in the Fig. 2 and 3 illustrated inking unit 06, the relevant motor 11; 12 z. B. in its respective speed of a z. B. electronic control unit is particularly regulated or at least controllable.
  • the z. B. designed as a segment wheel 03 printing ink-transmitting device is driven in the preferred embodiment by its own drive or in an embodiment not according to the invention by a central machine drive.
  • the inking roller 07 is or is z. B. rotatively driven by the anilox roller 08 by friction or also independently by a motor.
  • an outer diameter d07 of the inking roller 07 and an outer diameter d04 of the at least one printing form, in particular the plate cylinder 04 carrying at least one printing block are equal in terms of amount.
  • At least one printing block is arranged or at least can be arranged on the lateral surface of the plate cylinder 04, so that in the embodiment with the same external diameters d04; d07, the plate cylinder 04 carrying the printing block and the inking roller 07 each have an identical circumferential length.
  • the inking roller 07 in the first operating position of the inking unit 06 cooperating with the plate cylinder 04, in which the inking roller 07 and the anilox roller 08 are positioned against one another, the inking roller 07 is positioned on the plate cylinder 04 and the plate cylinder 04 is also positioned on the segmented wheel 03, at least the respective centers of the plate cylinder 04, the inking roller 07 and the anilox roller 08 are arranged along the same straight line G.
  • a Detection device z. B. is provided in the form of a rotary encoder, this rotary encoder in particular being rigidly connected to a shaft of the inking roller 07.
  • the signal generated by the rotary encoder when the inking roller 07 rotates is used by the control unit to set the speed of the inking roller 07 by means of the rotation of the anilox roller 08 or, if necessary, to track it in such a way that the plate cylinder 04 and the inking roller 07 are synchronized or is set so that the peripheral speed of the inking roller 07 corresponds to the peripheral speed of the plate cylinder 04 within previously defined permissible tolerance limits.
  • the control unit preferably adjusts the circumferential speed of the anilox roller 08 during the setting phase carried out by it in such a way that it has a lead or lag compared to the circumferential speed of the plate cylinder 04, particularly briefly - and therefore not permanently.
  • the plate cylinder 04 and inking roller 07 By designing the plate cylinder 04 and inking roller 07 with the same circumferential length in terms of amount, and by setting the synchronism between the plate cylinder 04 and the inking roller 07, the effect of stenciling, which is detrimental to the printing quality, is largely avoided.
  • the drive concept described here with a friction-driven inking roller 07 also has the advantage that a separate drive is not required for the inking roller 07, which saves costs and, because of the simpler mechanical construction, e.g. B. an exchange of the inking roller 07 facilitates maintenance or repair work.
  • the inking roller 07 has a closed, preferably rubberized, lateral surface.
  • the anilox roller 08 has a z. B. coated with a ceramic shell surface, with a hashur of z. B. 80 lines per centimeter of axial length of the anilox roller 08 or a cell structure is formed.
  • the outer diameter d08 of the anilox roller 08 is preferably larger than the outer diameter d07 of the inking roller 07.
  • the anilox roller 08 should accordingly have the largest possible conveying volume.
  • the respective direction of rotation of the segmented wheel 03, the plate cylinder 04, the inking roller 07 and the anilox roller 08 is indicated by an arrow indicating the direction of rotation.
  • At least the anilox roller 08 has a temperature control device, with the aid of which the jacket surface of the anilox roller 08 is tempered.
  • the temperature control of the anilox roller 08 works z. B. with a introduced into the interior of the anilox roller 08 temperature control fluid, wherein the temperature control fluid z. B. is water or another liquid coolant.
  • the delivery volume of the anilox roller 08 can be influenced, since this influences the viscosity of the printing ink to be transported by the inking unit 06.
  • a thickness of a color film to be applied to the cylindrical outer surface of the hollow body 01 to be printed and formed by the printing ink is, for example, approx. B. at less than 10 microns, in particular at about 3 microns.
  • the ink reservoir of the inking unit 06 is z. B. designed as a chamber doctor blade system 09 acting in conjunction with the anilox roller 08.
  • a chamber doctor blade system 09 acting in conjunction with the anilox roller 08.
  • This chamber doctor blade system 09 is in the inking unit 06, ie on a frame of the inking unit 06, preferably only on one side z. B.
  • This structural unit of the chamber doctor blade system 09 preferably forms a cantilever arm on a side frame of the inking unit 06.
  • Fig. 4 shows in a perspective view the chamber doctor blade system 09, which is designed as a single structural unit, in cooperation with the anilox roller 08 of the inking unit 06.
  • the anilox roller 08 After the anilox roller 08 has taken up printing ink from the ink reservoir, ie in particular from the chamber doctor blade system 09, the anilox roller 08 transports this printing ink directly and via further rollers of the roller train belonging to the inking unit 06 to the preferably only one inking roller 07.
  • a rider roller 13 In one in the direction of rotation of the anilox roller 08 the area between the chamber doctor blade system 09 and the inking roller 07 following the chamber doctor blade system 09 attached to the anilox roller 08, a rider roller 13 is preferably employed or at least adjustable to the anilox roller 08 in order to improve the ink transport of the anilox roller 08.
  • the rider roller 13 is arranged axially parallel to the anilox roller 08.
  • the rider roller 13 is not regarded as belonging to the roller train of the inking unit 06, since it does not transfer any printing ink from the anilox roller 08 to another roller.
  • the from the anilox roller 08 z. B. rotatively driven by friction rider roller 13 has z. B. a rubberized outer surface.
  • the rider roller 13 employed on the anilox roller 08 sucks some of the printing ink picked up by the anilox roller 08 from the chamber doctor blade system 09 from the hash or the cells of the anilox roller 08 and at least partially applies this printing ink to the surface of the anilox roller 08 as it rolls on the surface of the Anilox roller 08 formed webs.
  • a temperature control device having anilox roller 08 also improves the effectiveness of a control of the ink density in that the rider roller 13 rolling on the anilox roller 08 contributes to the provision of a larger amount of printing ink.
  • the rider roller 13 rolling on the anilox roller 08 thus reduces Regardless of the specific design of the anilox roller 08, ie with or without a temperature control device, both density differences that can arise from manufacturing tolerances of the anilox roller 08 and the risk of the hash or cells of the anilox roller 08 being visible on the printing material, ie here on the surface of the to be printed hollow body 01 as a result of at least in places too little paint application.
  • a plate changer 14 is provided for each printing forme cylinder, in particular plate cylinder 04, with which the printing forme intended for the respective printing forme cylinder or the printing cliché intended for the respective plate cylinder 04 within z.
  • the Fig. 5 and 6th show in a perspective representation a preferred embodiment of a very advantageously designed plate changer 14 in two different operating positions for carrying out a plate change or printing forme change that can be carried out preferably automatically, reliably and preferably in register in a very short set-up time.
  • FIG. 5 shows a first operating position, in the axially laterally next to the printing unit on the printing forme cylinder or plate changer 14 z. B. presented a printing plate or can be removed from the plate changer 14.
  • Fig. 6 shows a second operating position in which immediately in front of the printing forme cylinder or plate cylinder 04 along this from the plate changer 14 from z. B. a printing plate placed directly on the associated plate cylinder 04 or a printing plate removed from the plate cylinder 04 and removed with the plate changer 14 in its first operating position.
  • the disk changer 14 has a particularly planar, z. B. table-shaped support surface 16 on which z. B. arranged or to be arranged on the plate cylinder 04 printing cliché can preferably be placed completely.
  • the support surface 16 is preferably linearly longitudinal a transport path, in particular along the axis of rotation of the associated printing forme cylinder or plate cylinder 04 between at least two defined positions bi-directionally movable, ie arranged so as to be movable to and fro.
  • the plate changer 14 In a first position of the support surface 16 located laterally next to the printing unit, the plate changer 14 assumes its first operating position, in a second position of the support surface 16 located directly in front of the printing forme cylinder or plate cylinder 04 longitudinally to it, its second operating position. In the first operating position, the support surface 16 of the plate changer 14 is at least partially in front of an end face of the relevant printing forme cylinder or plate cylinder 04.
  • the support surface 16 of the plate changer 14 is preferably at least partially below the outer surface of the printing forme cylinder or plate cylinder 04.
  • the movement of the support surface 16 of the disc changer 14 takes place, for. B. along a cross member 17 arranged longitudinally to the printing forme cylinder or plate cylinder 04.
  • the support surface 16 of the plate changer 14 thus has an axial travel path with respect to the printing forme cylinder or plate cylinder 04 in question.
  • the movement of the support surface 16 is e.g. B. each limited by a stop.
  • At least the carrier of the printing block in question is z. B.
  • the relevant printing block can be arranged in register on the support surface 16 of the plate changer 14.
  • at least two edges of the carrier of the printing block in question are brought into touch contact with stops arranged on the support surface 16 of the plate changer 14, in particular formed by register pins, a first edge of the carrier of the printing block in question on a first register pin and a second edge, orthogonal to the first edge, of the carrier of the printing block in question strikes a second register pin, one of these two register pins being changeable and preferably adjustable in its position.
  • Register pin is z.
  • the relevant printing plate can be aligned in register.
  • the adjustment of the position of the adjustable pin can be done manually or automatically. Since the printing block is fed to the plate cylinder 04 in question in register, the plate cylinder 04 z. B. no centering pin and no other register device provided.
  • the disk changer 14 has in its preferred embodiment, in addition to the support surface 16 for receiving a z. B. the plate cylinder 04 in particular in register to be supplied printing plates z. B. a subject in which z. B. a printing plate removed from the plate cylinder 04 can be stored.
  • a z. B. by means of its carrier in particular magnetically held on the lateral surface of the plate cylinder 04 in question printing cliché is z. B. by means of a tool guided tangentially to the printing form, e.g. B. by means of a guided between the carrier of the printing block and the surface of the plate cylinder 04 in question is lifted from the surface of the plate cylinder 04 in question or can at least be lifted from there.
  • the one end of the relevant printing block lifted from the lateral surface of the relevant plate cylinder 04 is introduced into the relevant compartment of the plate cylinder 04 by rotating the relevant plate cylinder 04.
  • the entire printing block detached from the outer surface of the plate cylinder 04 in question is then pushed into the compartment of the plate changer 14 in question.
  • There is at least one stamp preferably two stamps arranged at a distance in the longitudinal direction of the plate cylinder 04 concerned, each with a stamp directed opposite to the magnetic holding force, towards the support surface 16 of the plate changer 14, for example.
  • B. provided substantially orthogonal effective direction, with which at least one Stamp at least one end of the printing cliché held on the support surface 16 of the plate changer 14 facing the relevant plate cylinder 04 can be detached from this support surface 16 and transferred to the relevant plate cylinder 04 due to a lifting movement of the at least one stamp.
  • the at least one stamp is z. B.
  • magnets are used, these magnets preferably being designed as permanent magnets.
  • the previously described configuration of the plate cylinder 04 has the advantage that a conveying device for transferring the printing cliché to the relevant plate cylinder 04 or for removing the printing cliché from the relevant plate cylinder 04 is not required and the plate changer 14 can therefore be implemented very inexpensively. In particular, a plate change can be carried out automatically with the plate changer 14 described above.
  • the printing forme cylinder or plate cylinder 04 is in particular mounted at both ends on a load arm of a preferably one-sided first lever arrangement 18 consisting of a force arm and the load arm, the force arm and the load arm of this first lever arrangement 18 arranged at an angle to the force arm together around an axially parallel to the Plate cylinder 04 directed first axis of rotation 19 are pivotable.
  • B. arranged in the form of a hydraulic or pneumatic working cylinder, with an actuation of this first drive 21 depending on its direction of action on the load arm of this first lever arrangement 18 arranged printing forme cylinder or plate cylinder 04 either from a printing blanket z.
  • the segment wheel 03 is turned off or employed at the same. To limit the from the printing forme cylinder or plate cylinder 04 against the printing blanket in question z. B.
  • a first stop 22 is provided, for example, for the power arm of the first lever arrangement 18, by means of which a path covered by the pivoting movement of the printing forme cylinder or plate cylinder 04 against the segmented wheel 03 is limited.
  • the pressure exerted by the printing forme cylinder or plate cylinder 04 against the segmented wheel 03 can be adjusted.
  • the inking roller 07 is also mounted, in particular at both ends, on a load arm of a, preferably one-sided, second lever arrangement 23 consisting of a force arm and the load arm, the force arm and the load arm of this second lever arrangement 23 together about the first axis of rotation 19, which is axially parallel to the plate cylinder 04 are pivotable.
  • the anilox roller 08 is also mounted, in particular at both ends, on a load arm of a preferably one-sided third lever arrangement 24 consisting of a force arm and the load arm, the force arm and the load arm of this third lever arrangement 24 together about a second axis of rotation directed axially parallel to the anilox roller 08 26 are pivotable, the second axis of rotation 26 of the third lever arrangement 24 being arranged on the second lever arrangement 23, the second axis of rotation 26 being designed to be stationary on the second lever arrangement 23.
  • a preferably controllable second drive 27 which, when it is actuated, acts on the force arm of the second lever arrangement 23, by means of which the inking roller 07 can be adjusted to or from the plate cylinder 04 depending on the direction of action of the second drive 27.
  • a preferably controllable third drive 28 which, when it is actuated, acts on the force arm of the third lever arrangement 24 and by means of which the anilox roller 08, preferably together with the chamber doctor blade system 09 depending on the direction of action of the third drive 28, it can be adjusted to the paint application roller 07 or can be switched off from it.
  • the second drive 27 and / or the third drive 28 are each z. B.
  • the pivoting movement of the load arm of the second lever assembly 23 is e.g. B. limited by a preferably adjustable, in particular adjustable by an eccentric first stop system 29, whereby the contact pressure exerted by the inking roller 07 against the printing forme cylinder or plate cylinder 04 is limited or at least limited.
  • the pivoting movement of the load arm of the third lever assembly 24 is e.g. B. limited by a preferably adjustable, in particular adjustable by an eccentric second stop system 31, whereby the contact pressure exerted by the anilox roller 08 against the inking roller 07 is limited or at least can be limited.
  • Fig. 2 shows an example of a first operating state in which the first drive 21 and the second drive 27 and the third drive 28 are each inactive or in their idle state, whereby the anilox roller 08 to the inking roller 07 and the inking roller 07 to the printing forme cylinder or plate cylinder 04 and the printing forme cylinder or plate cylinder 04 are each employed on the segment wheel 03.
  • Fig. 3 shows an example of a second operating state in which the first drive 21 and the second drive 27 and the third drive 28 are each actuated or in their working state, whereby the anilox roller 08 from the inking roller 07 and the inking roller 07 from the printing forme cylinder or plate cylinder 04 and the Printing forme cylinder or plate cylinder 04 are each turned off by segment wheel 03.
  • the respective power arm and / or load arm of the three aforementioned lever arrangements 18; 23; 24 is or are each z. B. formed as a pair of opposing lever rods or side frame walls, between which either the printing forme cylinder or plate cylinder 04 or the inking roller 07 or the anilox roller 08 is arranged in the respective assignment described above.
  • the three aforementioned lever arrangements 18; 23; 24 are each in different arranged spaced apart vertical planes so that they do not hinder each other in their respective pivotability.
  • Fig. 13 As already described and in Fig. 13 shown, are on the circumference of the segment 03 in a row usually several, z. B. eight to twelve printing blankets 33 are arranged, wherein in the printing process during the rotation of this segment wheel 03 about an axis of rotation 34 printing forms of the printing forme cylinders or printing blocks of the plate cylinder 04 roll on the printing blankets 33 moved with this segment wheel 03.
  • the printing plates press at least their printing relief z. B. 0.2 mm to 0.25 mm deep into the respective printing blanket 33, whereby the printing blankets are subject to wear and tear and depending on their nature and in particular mechanical stress after a certain number of prints, e.g. B. after 50,000 printed hollow bodies 01 must be renewed.
  • each of these printing blankets 33 to be arranged on the segment wheel 03 is in each case on a preferably flat, tabular metal support with a material thickness of, for. B. 0.2 mm cohesively, in particular applied by an adhesive.
  • the respective preferably magnetizable metal carrier is then together with the printing blanket 33 arranged on it on one of the segments 32 on the circumference of the segment wheel 03 z. B. by at least one holding magnet provided there on the circumference for each printing blanket 33 or its support, in particular correctly positioned.
  • the printing blankets 33 are each preferably designed as a rubber blanket.
  • the direction of rotation of the segment wheel 03 carried out during the printing process is in the Fig. 13 indicated by a direction of rotation arrow.
  • the hollow bodies 01 which are brought up to the segmented wheel 03 by the mandrel wheel 02 rotating about the axis of rotation 41 on a mandrel, are individually and briefly one after the other in the printing process, i.e. for a single rotation of the hollow body 01 to be printed on, through a primarily radial movement of the mandrel in question relevant currently printing blanket 33 pressed on.
  • the device for automatically changing the printing blankets 33 is preferably of modular construction and, as in FIG Figures 7 to 12 shown as an example - as modules z. B. a memory device 42 for several, z. B. up to twelve blankets 33 on ( Fig. 7 ) as well as a device 43 for vertical transport of the aforementioned storage device 42 ( Fig. 8 ) and a device 44 for the horizontal transport of one of the printing blankets 33 between the storage device 42 and an installation location on the segmented wheel 03 ( Fig. 9 ).
  • the Fig. 10 shows the memory device 42 in its operating state arranged on the device 43 provided for its vertical transport.
  • the storage device 42 has in a preferably cuboid housing several vertically arranged compartments, in each of which a single printing blanket 33 is stored on its back, ie lying on its carrier, preferably in a horizontal orientation, wherein in the housing z. B. at least as many compartments are provided as the associated segment wheel 03 has segments 32 for blankets 33 on its circumference.
  • the subjects are each z. B. open at least on one of its long sides in order to enable the respective blanket 33 to be fed in or removed from the open side of the respective compartment.
  • This storage device 42 is preferably on or on a carrier of the device 43 for the vertical transport of this storage device 42 as a light, z. B. toolless replaceable module attached or at least attachable.
  • the device 43 for the vertical transport of the storage device 42 is z. B. designed executing a lifting movement, the vertical travel z. B. is about 200 mm.
  • the lifting movement of the device 43 for the vertical transport of the storage device 42 is z. B. carried out by means of a preferably driven by an electric motor trapezoidal screw spindle.
  • a device 44 for the horizontal transport of these printing blankets 33 is provided in order to transport the individual printing blankets 33 between the storage device 42 and an assembly location on a segment 32 of the segmented wheel 03.
  • This device 44 for the horizontal transport of the printing blankets 33 has, for. B. a carriage 46 which can be moved bidirectionally, in particular linearly, between two end points, a single printing blanket 33 being transported or at least transportable with the carriage 46.
  • a blanket 33 automatically removed from the storage device 42 is preferably lying on its back on the carriage 46 against a z. B. is transported under the segmented wheel 03 assembly location and received there by a segment 32 of the segmented wheel 03.
  • a printing blanket 33 to be removed from a segment 32 of the segmented wheel 03 is preferably applied with a spatula 47 that is set against the relevant segment 32 or at least that can be set there peeled off the relevant segment 32 and z. B.
  • the spatula 47 employed at an acute angle or tangentially to the relevant segment 32 of the segment wheel 03 in connection with a rotary movement of the segment wheel 03 directed against the spatula 47 in the preferred embodiment in particular, metal carrier of the relevant printing blanket 33, which is held magnetically on the circumference of the segmented wheel 03, lifts off the relevant segment 32 and thus from the circumference of this segmented wheel 03.
  • the spatula 47 is shown both in an operating position set against the relevant segment 32 of the segmented wheel 03 and in a parked operating position, these operating positions being assumed alternatively.
  • the renewal or replacement of at least one of the printing blankets 33 arranged on the circumference of the segmented wheel 03 is then preferably carried out as follows:
  • the segment wheel 03 conveys a printing blanket 33, which is arranged on its circumference, and is to be removed, into a position at which this printing blanket 33 can be dismantled using the device for automatically changing the printing blankets 33.
  • the slide 46 of the device 44 for the horizontal transport of the printing blankets 33 moves along its travel path to the end point which is closest to the dismantling location of the printing blanket 33 to be removed.
  • This position of the carriage 46 is preferably monitored by sensors and / or by a first switching element 48, e.g. B. by an inductive or capacitive proximity switch.
  • the spatula 47 is preferably positioned on the edge 37 of the metal support of the relevant printing blanket 33 to be removed, which is trailing in the direction of rotation of the segmented wheel 03.
  • this is preferably magnetic on the circumference of the segmented wheel 03
  • the holding blanket 33 to be removed is peeled off from the circumference of this segmented wheel 03, ie the metal carrier of the printing blanket 33 is lifted from its support on the segmented wheel 03.
  • the spatula 47 is then placed back from the circumference of the segmented wheel 03.
  • the printing blanket 33 released from the relevant segment 32 of the segmented wheel 03 then falls due to gravity either directly into a storage device for worn printing blankets 33 or is transported to this storage device for worn printing blankets by means of the slide 46 of the device 44 for the horizontal transport of the printing blankets 33.
  • a new printing blanket 33 glued to a metal carrier is inserted, this storage device 42 being preferably arranged in a raised upper position by the device 43 for its vertical transport .
  • the slide 46 of the device 44 for the horizontal transport of one of the printing blankets 33 between the storage device 42 and the installation location on the segmented wheel 03 is arranged below the compartment with the new printing blanket 33.
  • the new printing blanket 33 is placed on the carriage 46 of the device 44 for horizontal transport. It is preferably sensory and / or by a second switching element 49, for. B.
  • the carriage 46 of the device 44 for the horizontal transport of the printing blankets 33 moves along its travel path to the end point which is closest to the installation location of the new printing blanket 33, this position of the carriage 46 in turn preferably being sensory and / or is monitored by a third switching element 51, e.g. B. by an inductive or capacitive proximity switch.
  • the segment gear 03 is also located already in an angle of rotation position suitable for receiving the new blanket 33, this angle of rotation position z. B. is located at the base of the segment gear 03 or in its vicinity.
  • the new printing blanket 33 is aligned in its position at least in register by an impact against at least stop 52 before it is mounted on the circumference of segmented wheel 03.
  • a drive is provided, this drive z. B. is designed as a compressed air cylinder.
  • this segmented wheel 03 rotates in its direction of rotation carried out during the printing process and thereby takes the new printing blanket 33 on its circumference.
  • the slide 46 of the device 44 for the horizontal transport of the printing blankets 33 is then moved again to the storage device 42 for the several new printing blankets 33 in order to fetch another new printing blanket 33 if necessary.
  • this device has a segment wheel 03 that can be rotated about an axis of rotation 34, the segment wheel 03 having several segments 32 one behind the other on its circumference, each for receiving a printing blanket 33 wherein at least one of the printing blankets 33 arranged on one of the segments 32 is arranged rolling or at least unrollable on the hollow body 01 to be printed, with several printing units being provided, with at least one of the printing units being attached to at least one of the printing blankets 33 arranged on the circumference of the segment wheel 03 is employed or at least employable, with at least one of the printing units having a printing forme cylinder 04, with a plate changer 14 for automatically changing a printing forme being arranged on this printing forme cylinder 04 in association with the relevant printing forme cylinder 04 and with in association with the segment wheel 03 a device for automatically changing at least one of the printing blankets 33 arranged on the circumference of this segmented wheel 03 is arranged.
  • the disk changer 14 preferably has a support surface 16 on which the printing forme to be arranged or arranged on the printing forme cylinder 04 can be placed, this support surface 16 being movable bidirectionally along a transport path between at least two defined positions.
  • the printing forme to be supplied to the printing forme cylinder 04 is z. B. held on the support surface 16 of the disk changer 14 by a magnetic holding force.
  • the device for automatically changing the printing blankets 33 is particularly modular, with a storage device 42 for several printing blankets 33 as well as a device 43 for vertical transport of this storage device 42 and a device 44 for horizontal transport of one of the printing blankets 33 between of the storage device 42 and one of the segments 32 of the segment wheel 03.
  • the storage device 42 has a plurality of compartments arranged vertically one above the other in a housing, in each of which a single printing blanket 33 is stored or at least can be stored.
  • the printing blankets 33 are each stored in the storage device 42 preferably lying on their backs and / or in a horizontal orientation.
  • the device 43 for the vertical transport of the storage device 42 is z.
  • executing a lifting movement and / or the device 44 for the horizontal transport of the printing blankets 33 has a bidirectionally movable carriage 46 between two end points, with the carriage 46 each transporting a single printing blanket 33 or at least being transportable.
  • the plate changer 14 and the device for automatically changing the printing blankets 33 are, for. B.
  • the plate changer 14 and the device for automatically changing the printing blankets 33 are each active in particular at the same time and their respective change of a printing form or a printing blanket 33 z.
  • the printing forme to be arranged on the printing forme cylinder 04 is preferably in register with regard to its mounting position on the printing forme cylinder 04 on the support surface 16 of the plate changer 14 and / or the printing blanket 33 to be arranged on the circumference of the segment wheel 03 is on the carriage 46 of the Device 44 for the horizontal transport of the printing blankets 33 is arranged in the correct position with regard to its mounting position on a segment 32 of the segment wheel 03.
  • An inking unit 06 transporting printing ink to the printing forme cylinder 04 is preferably designed as a short inking unit having an anilox roller 08.
  • a device for printing hollow bodies 01 which has a segment wheel 03 rotatable about an axis of rotation 34, the segment wheel 03 having several segments 32 one behind the other on its circumference, each for receiving a printing blanket 33, at least one of the segments being arranged on one of the segments 32
  • Printing blankets 33 are arranged to roll or at least roll off the hollow body 01 to be printed, with adjacent segments 32 being separated from one another by a recess 36 directed parallel to the axis of rotation 34 of the segment wheel 03, it is also advantageous that each of the printing blankets 33 are each on a plate-shaped metallic carrier is arranged, wherein the carrier together with the printing blanket 33 arranged on it is arranged or at least can be arranged on one of the segments 32 of the segment wheel 03 so as to be exchangeable as a whole, the carrier arranged on one of the segments 32 of the segment wheel 03 on this segment 32 in a m form fit and / or is held in a force fit.
  • Each carrier of a printing blanket 33 is preferably bent at an acute angle at its leading edge 37 in the direction of rotation of the segmented wheel 03, this bevel 38, in the operating state of this carrier arranged on a segment 32 of the segmented wheel 03, against an edge 39 of the relevant am which leads in the direction of rotation of the segmented wheel 03 Circumference of the segmented wheel 03 formed recess 36 is applied, wherein the bevel 38 of the carrier is arranged on this edge 39 of the recess 36 in a form fit or at least can be arranged.
  • the plate-shaped metallic carrier is particularly flexible and, together with the printing blanket 33 arranged on it, forms e.g. B. a metal blanket.
  • the carrier arranged on one of the segments 32 of the segment wheel 03 is held on this segment 32 by a magnetic force.
  • On the circumference of the segment gear 03 are one behind the other z. B. eight to twelve segments 32 each arranged to receive a printing blanket 33.
  • a device for automatically changing the printing blankets 33 is provided, the device for automatically changing the printing blankets 33 is preferably modular and as modules a storage device 42 for several printing blankets 33 and a device 43 for vertical transport of the aforementioned storage device 42 and a device 44 for the horizontal transport of one of the printing blankets 33 between the storage device 42 and one of the segments 32 of the segment wheel 03.
  • the storage device 42 has in a housing in particular a plurality of compartments arranged vertically one above the other, in each of which a single printing blanket 33 is stored or at least can be stored.
  • the housing of the storage device 42 for. B. at least as many compartments are provided as the associated segment wheel 03 has segments 32 for blankets 33 on its circumference.
  • the device 43 for the vertical transport of the storage device 42 is designed to perform a lifting movement and / or the device 44 for the horizontal transport of the printing blankets 33 has a carriage 46 which can be moved bidirectionally between two end points, with one in each case being the carriage 46 individual printing blanket 33 is transported or at least can be transported.
  • a method for operating a device having a segment wheel 03 for printing hollow bodies 01 a printing blanket 33 being arranged on at least one segment 32 of the segment wheel 03 having several segments 32 one behind the other on its circumference, with at least one being on one of the Segments 32 arranged printing blanket 33 rolls during a rotation of the segment wheel 03 on the hollow body 01 to be printed, with a device provided in association with the segment wheel 03 for the automatic changing of printing blankets 33 according to a command given to its control unit that on the relevant segment 32 of the segment wheel 03 automatically removes the printing blanket 33 to be arranged from a storage device 42 and moves it to the relevant segment 32 of the segment wheel 03 transported.
  • the device for automatically changing printing blankets 33 has a device 44 for horizontal transport of the printing blankets 33 with a movable carriage 46, the printing blankets 33 to be transported being transported lying on the carriage 46.
  • a printing blanket 33 lying on the carriage 46 is preferably arranged in the correct position with regard to an assembly position on one of the segments 32 of the segment wheel 03.
  • a plurality of printing blankets 33 are stored in the storage device 42, the printing blankets 33 each being stored individually one after the other on the carriage 46 of the device 44 for the horizontal transport of the printing blankets 33 and being transported one after the other to one of the segments 32 of the segmented wheel 03.
  • a printing blanket 33 to be arranged on one of the segments 32 of the segmented wheel 03 is arranged on the relevant segment 32 in particular by a form fit produced between the relevant segment 32 and the printing blanket 33 when this segmented wheel 03 rotates.
  • a arranged on one of the segments 32 of the segment wheel 03 printing blanket 33 is preferably by a z.
  • a printing blanket 33 removed from one of the segments 32 of the segmented wheel 03 is likewise preferably transported away from the relevant segmented wheel 03 with the device 44 for the horizontal transport of the printing blankets 33.
  • the device 44 for the horizontal transport of the printing blankets 33 alternately transports away a printing blanket 33 removed from one of the segments 32 of the segmented wheel 03 and a new, ie unused, printing blanket 33 from the storage device 42 to a free segment 32 of the segmented wheel 03 transported, ie to a segment 32 on which no printing blanket 33 is currently arranged.
  • a switching element 49 z. B. monitors whether a blanket 33 to be removed or removed from the storage device 42 has actually and / or correctly positioned on the carriage 46 of the device 44 for the horizontal transport.
  • Fig. 14 shows the segment wheel 03 of FIG Device for printing hollow bodies 01, wherein on the circumference of this segment wheel 03 one behind the other several, z. B. twelve segments 32 for receiving one blanket 33 each are arranged.
  • This segment wheel 03 is preferably made of a casting material, for. B. made of cast iron, and has a mass z. B. of more than 500 kg, in particular of about 1,000 kg or more.
  • the segment wheel 03 has an outer diameter in the range of, for. B. 1,400 mm to 1,600 mm.
  • the segment wheel 03 is with its shaft 53 in a frame 66 of this device for printing hollow bodies 01 preferably at both ends z. B. each stored in particular double-row rolling bearings 63 and rotatively driven by a drive.
  • This drive which rotatively drives the segmented wheel 03, is designed as an electric motor 58 with a stator 61 and a rotor 62 having a hollow shaft 54, the hollow shaft 54 being or at least being able to be arranged coaxially with the shaft 53 of the segmented wheel 03.
  • the shaft 53 of the segment wheel 03 protrudes into the installation space of the motor 58 and the shaft 53 of the segment wheel 03 and the rotor 62 of the motor 58 are rigidly connected to one another.
  • the segment gear 03 is preferably on both sides z. B.
  • the motor 58 provided for the rotary drive of the segmented wheel 03 is preferably designed as a multi-pole, electrical direct drive with a number of poles, e.g. B. greater than twenty and / or designed as a permanent magnet brushless DC motor and exemplified in the Fig. 15 shown in perspective.
  • This motor 58 has z. B. a cooling device or is at least connected to such, wherein the cooling device is designed as a liquid cooling.
  • Fig. 15 shows two connections formed on the housing 59 of the motor 58 for this liquid cooling, namely one connection for the coolant inflow 56 and another connection for the coolant outflow 57.
  • this motor 58 is designed as a torque motor.
  • a preferably digital control unit which controls or regulates it is provided for this motor 58, whereby the control unit, by positioning the shaft 53 of the Segment wheel 03 in the stator of the motor 58 a position on the circumference of this segment wheel 03 relative to a position on the outer surface of a hollow body 01 to be printed, preferably with a positioning accuracy of less than 0.1 mm is set or at least adjustable.
  • z. B. at the end of the shaft 53 opposite the motor 58, a rotary encoder 64 is provided, the rotary encoder 64 having a high angular resolution of z. B.
  • the motor 58 and / or the rotary encoder are preferably each connected to the control unit controlling or regulating the motor 58 via a control bus.
  • the aforementioned embodiment of the rotary drive of the segmented wheel 03 has the advantage that this drive is designed to be decentralized as well as gearless and clutchless. This drive of the segment wheel 03 is therefore compact and free of play.
  • a position on the circumference of this segmented wheel 03 relative to a position on the outer surface of a hollow body 01 to be printed can easily be set with a positioning accuracy of less than 0.1 mm, which has a very advantageous effect on the achievable print quality .
  • this segmented wheel 03 runs very smoothly, whereby a uniform transfer of ink from the respective inking units 06 to the relevant printing blankets 33 arranged on the circumference of the segmented wheel 03 is ensured.
  • a high acceleration and thus short run-up times of 10 s or less can also be achieved for the segment gear 03.
  • the proposed drive for the segment gear 03 also has the advantage of being low-noise and low-maintenance. Overall, this results in a very efficient drive for the segment gear 03.
  • the above-described device for printing carry out a so-called "on-the-fly production change" of hollow bodies 01, ie a change is made from a first printing process to a second printing process without interrupting production. If it is not necessary to change the printing blanket, production is switched over while the segmented wheel 03 continues, ie continues to rotate without interruption and continuously prints hollow bodies 01.
  • a machine arrangement in which a few thousand pieces of this hollow body 01 per minute, e.g. If, for example, between 1,500 and 3,000 pieces are produced per minute, an uninterrupted change of production means an enormous increase in efficiency. And even if at least one of the printing blankets has to be changed with the production change, the set-up times for the decorator can be shortened considerably with the following process.
  • this device having a segment wheel 03 rotating about its axis 34 with several printing blankets 33 arranged one behind the other on its circumference and preferably in a star-shaped association with this segment wheel 03, ie several on its periphery each has a plate cylinder 04 carrying a printing forme or a printing block 68, each of these plate cylinders 04 being supplied with a specific printing ink to color its printing forme or printing block 68 by means of an inking unit 06, preferably designed as a short inking unit, with an in particular two-roller roller train.
  • a selected number of plate cylinders 04 are attached to the segmented wheel 03, e.g. B. turned radially or turned off from this segment gear 03.
  • a first printing process a first subset of each of the plate cylinders 04, each carrying a colored printing form or a colored printing cliché 68, which are positioned on the rotating segment wheel 03, transfers printing ink to several of the printing blankets 33 arranged on this segment wheel 03.
  • At the end of the first printing process at least some of the Plate cylinder 04 adjusted to segment wheel 03 in the first printing process parked by this rotating segment gear 03.
  • a second subset of plate cylinders 04 each carrying an inked printing forme or an inked printing cliché 68 is now placed on this segmented wheel 03, in particular radially, so that these plate cylinders 04 each have printing ink to carry out a second printing process different from the first printing process several of the printing blankets 33 arranged on this segment wheel 03 are transferred.
  • the printing blankets 33 in turn transfer the respective printing ink to the rotating segment wheel 03 z. B. by means of a mandrel wheel 02 brought to the printing hollow body 01.
  • those inking units 06 which each supplied printing ink to the first subset of plate cylinders 04 in the first printing process are turned off by this first subset of plate cylinders 04.
  • those inking units 06 which each supply printing ink to the second subset of plate cylinders 04 in the second printing process are adjusted to this second subset of plate cylinders 04.
  • the segment wheel 03 is - as described above - preferably independently, ie at least independently of the plate cylinders 04 and / or the inking units 06, from a z. B. designed as a direct drive motor 58 rotatively driven.
  • the plate cylinders 04 that are set or at least adjustable to the segmented wheel 03 are each independently, ie at least independently of the segmented wheel 03, driven in rotation by a motor 11.
  • the inking units 06 each have exactly one inking roller 07 and, for example, one of the plate cylinders 04 concerned or that can be adjusted or that can be switched off or switched off by this plate cylinder 04. B.
  • the respective inking roller 07 and possibly the relevant anilox roller 08 each independently, ie driven separately by a motor 12 in rotation will.
  • the respective inking roller 07 z. B. each arranged in the same inking unit 06 anilox roller 08 are driven rotatively by friction.
  • the mentioned separate drives 11; 12; 58, ie the motor 58 independently rotating the segment wheel 03 and / or the respective motor 11 independently rotating the respective plate cylinder 04 and / or the motor 12 independently rotating the respective inking roller 07 and / or the anilox roller 08 preferably each independently controlled or regulated by a control unit and preferably individually.
  • the respective adjustment and / or adjustment of the relevant plate cylinder 04 and / or the relevant inking units 06 is preferably controlled by the control unit independently of one another, depending on the printing process to be carried out.
  • At least one person who is not involved in the ongoing printing process i.e. H. plate cylinder 04 currently not positioned on the rotating segmented wheel 03 the respective printing form or the respective printing cliché 68 during this ongoing printing process, each using a z. B. previously described disk changer 14 is preferably changed automatically.
  • the segmented wheel 03 is brought to a standstill and at least one printing blanket 33 arranged on this segmented wheel 03 is changed automatically using a device for automatically changing the printing blankets 33.
  • a method for printing hollow bodies 01 can be carried out, in which printing ink is transferred to each of the hollow bodies 01 by one of the printing blankets 33 arranged one behind the other on the circumference of a segmented wheel 03 rotating about its axis 34 , in which at least two plate cylinders 04 are used, arranged one after the other in the direction of rotation of the segmented wheel 03, each carrying a printing cliché 68, in which one of one of a first plate cylinder 04 first printing ink applied to its printing cliché 68 is transferred to a first printing blanket 33 of the printing blankets 33 arranged on the circumference of the segmented wheel 03 and from there split back onto the printing cliché 68 of a second plate cylinder 04 arranged downstream of the first plate cylinder 04 in the direction of rotation of the segmented wheel 03, ie is transferred by splitting back.
  • a second printing ink different from the first printing ink is applied to its printing block 68.
  • the first printing ink applied by split-back and the second by the second inking unit 06 on the printing block 68 of the second plate cylinder 04 are then jointly transferred to a second printing blanket 33 of the printing blankets 33 arranged on the circumference of the segmented wheel 03.
  • the different printing inks applied to the printing block 68 of the second plate cylinder 04 are applied to this printing block 68 in different adjacent areas, the printing inks applied to the printing block 68 of the second plate cylinder 04 mixing in their respective boundary area 71.
  • the printing inks 69 applied to the printing cliché 68 of the second plate cylinder 04 are then transferred to the second printing blanket 33, with the image of the mixing that took place in their respective border area 71.
  • a short inking unit employed on the respective plate cylinder 04 ie an inking unit 06 with a roller train consisting of a maximum of five rollers or, in the preferred embodiment, an inking unit 06 with two rollers 07; 08 existing roller train is used, the respective plate cylinder 04 only being assigned a single inking roller 07.
  • an inking roller 07 is used, the circumferential length of which corresponds to the circumferential length of the respective plate cylinder 04.
  • the outer diameter d04 of the plate cylinder 04 carrying the relevant printing block 68 and the outer diameter d07 are accordingly that of the plate cylinder 04 placed on this plate cylinder 04 Inking roller 07 is the same in terms of amount.
  • a fully encased inking roller 07 is used.
  • a fully encased inking roller 07 or preferably a coated inking roller 07 with recesses made on its outer surface are used. These depressions are in particular depending on the print image to be printed and / or z. B. formed in the axial direction and / or in the circumferential direction.
  • printing blankets 33 are used with incorporated depressions.
  • the depressions in the outer surface of the inking roller 07 used to color the second plate cylinder 04 and / or in the blankets 33 used to print the hollow bodies 01 are each z. B. introduced by mechanical engraving or by milling or by lasers.
  • the first inking unit 06 inks at least one flat first print image point on the printing block 68 of the first plate cylinder 04 and the second inking unit 06 inks at least one second print image point which is flat on the printing block 68 of the second plate cylinder 04. Due to its position and size, the second print image area formed on the printing block 68 of the second plate cylinder 04 includes the area into which the respective area of the at least one first print image area formed on the printing block 68 of the first plate cylinder 04 is transferred or split back.
  • the inking roller 07 of the second inking unit 06 which inks the printing cliché 68 of the second plate cylinder 04 has a recess in its outer surface on the surface corresponding to the at least one first print image location of the printing cliché 68 arranged on the first plate cylinder 04, as described above.
  • the respective peripheral speeds both from the first plate cylinder 04 and from the inking the printing cliché 68 arranged on this first plate cylinder 04 as well as the respective circumferential speeds of the second plate cylinder 04 and of the inking the printing cliché 68 arranged on this second plate cylinder 04 are inking z. B. set synchronously with each other by a control unit, in particular with regard to a common reference point, the first plate cylinder 04 and the inking roller 07 inking its printing cliché 68 as well as the second plate cylinder 04 and the inking roller 07 inking its printing cliché 68 behaving angularly synchronously with one another.
  • the plate cylinder 04 and the associated inking roller 07 are therefore each in synchronism.
  • this synchronization must be given for all printing units 73 and inking units 06 involved in production at any point in time of the relevant production process, i.e. also immediately after a previous machine stop, i.e. immediately after the start of production.
  • the respective circumferential speeds of the hollow bodies 01 to be printed and of the segment wheel 03 are synchronized with one another.
  • color gradients so-called iris printing effects
  • iris printing effects are produced when executing a letterpress process, with which the depth of design that can be achieved in the print can be increased and / or security features can also be produced.
  • color gradients completely new types of decorations can be produced on hollow bodies 01 in their axial direction and / or circumferential direction. This succeeds with the method described even using short inking units, including those with a z. B. only two-roller compactor.
  • Fig. 17 shows in three phases a production sequence for producing a color gradient on a hollow body 01, with at least two inking units 06 each with an inking roller 07 being used in this device for printing hollow bodies 01, the respective circumferential length of which corresponds to the extended length of the inking unit 06 used in the same inking unit Printing blocks 68 corresponds.
  • a first Production phase ( Figure 17a ) is in a first inking unit 06 with a first z. B. fully coated inking roller 07, a first printing ink 69 is applied to a first printing block 68 arranged on a first plate cylinder 04.
  • FIG Figure 17a Paint application shown both in a section and in a plan view.
  • a second production phase ( Figure 17b ) is in a second inking unit 06 with a second z.
  • an inking roller 07 having a recess in the circumferential direction
  • a second printing ink 69 is applied to a second printing block 68 arranged on a second plate cylinder 04.
  • FIG. 17b Paint application shown both in a section and in a plan view.
  • Figure 17c shows an example of a third production phase in which both the first printing ink 69 and the second printing ink 69 are applied in adjacent areas on the printing block 68 arranged on the second plate cylinder 04, the first printing ink 69 being applied to the second printing block 68 by splitting back has been.
  • a joint transfer of the two printing inks 69 to the second printing blanket 33 interacting with the second plate cylinder 04 results in the printing blanket shown in FIG Figure 17c Color application shown both in a section and in a top view, with a color mixture due to splitting and thus a color gradient or an iris printing effect being formed in the respective border area 71 of the two printing inks 69 applied to the second printing blanket 33.
  • This color gradient can now be transferred further to the hollow bodies 01 to be printed.
  • Another very advantageous method for printing hollow bodies has the method steps that each of the hollow bodies 01 printing ink 69 from one which is transferred one behind the other on the circumference of a segmented wheel 03 rotating about its axis 34 printing blankets 33, whereby a plurality of printing units 72; 73 each printing ink 69 is applied to the respective printing blanket 33.
  • a first subset of the printing units 73 applies printing ink 69 in a contact process, preferably in a letterpress process or also in a screen printing process or in an offset printing process on the printing blanket 33 in question, and a second subset of the printing units 72 carries printing ink 69 in each case a digital printing process on the relevant printing blanket 33 without printing form, with all of the respective printing units 72; 73 printing inks 69 ultimately to be transferred to the relevant hollow body 01 are initially collected on the relevant printing blanket 33 and then transferred together from the relevant printing blanket 33 to the relevant hollow body 01.
  • the at least one printing ink 69 is arranged in a digital printing process without printing form on the relevant printing blanket 33 with respect to the zenith of the segmented wheel 03 preferably within an angular range ⁇ of ⁇ 45 ° and thus in an upper area of this segmented wheel 03.
  • at least one inkjet print head 74 or a laser is used for the at least one printing ink 69 that applies to the relevant printing blanket 33 in a digital printing process without printing form. It is particularly advantageous if a double array is used for each of the at least one printing ink 69 in a digital printing process without printing form on the printing blanket 33 in question, i.e.
  • a printing unit 72 in which two preferably the same printing ink is applied to the printing blanket 33 in question applying printing devices, e.g. B.
  • two inkjet print heads 74 are arranged one behind the other in the circumferential direction of the segment wheel 03.
  • a single array or another multiple array can be used.
  • the at least one printing ink 69 in particular at least one of the printing inks cyan and / or magenta and / or yellow and / or in a digital printing process is applied to the printing blanket 33 without printing form Applied black.
  • segmented wheel 03 is rotatively driven by a direct drive designed as a motor 58.
  • the hollow bodies 01 to be printed are brought to the rotating segmented wheel 03 by a mandrel wheel 02 rotating in the opposite direction to the segmented wheel 03 about an axis 41, the relevant printing blanket 33 with the printing inks 69 collected on it for transferring these printing inks 69 rolls on the relevant hollow body 01. Furthermore, in order to shorten set-up times, at least one printing blanket 33 arranged on the segmented wheel 03 can be automatically changed using a device for automatically changing the printing blankets 33.
  • printing units 73 that print in a letterpress printing process each use an inking unit 06 which is employed on the respective plate cylinder 04 and has a roller train consisting of a maximum of five rollers, ie preferably a short inking unit.
  • the first subset of z. B. printing units 73 that print in a letterpress printing process each have an inking unit 06 that is set against the respective plate cylinder 04, each with only a single inking roller 07.
  • Fig. 18 shows in a schematic representation the device for printing hollow bodies 01 with a multicolored, z. B. four-color each in a digital printing process printing formless printing unit 72 and with several, z. B. six printing units 73 each printing in a letterpress process or in a screen printing process or in an offset printing process.
  • the result is a hybrid device for printing hollow bodies 01, with which, in a very advantageous manner, even smaller print runs or batches of hollow bodies 01 that are in the Device for printing hollow bodies 01 a more frequent change of decor can be produced efficiently.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)

Claims (11)

  1. Procédé d'impression de corps creux, dans lequel une encre (69) est transférée sur le corps creux (01) respectivement par l'un des blanchets d'impression (33) agencés les uns derrière les autres sur la périphérie d'une roue segmentée (03) en rotation autour de son axe (34), dans lequel sont utilisés au moins deux cylindres porte-plaque (04) agencés les uns derrière les autres dans la direction de rotation de la roue segmentée (03) et qui portent respectivement un cliché d'impression (68), dans lequel une première encre (69) appliquée sur le cliché d'impression (68) d'un premier cylindre porte-plaque (04) par un premier mécanisme d'encrage (06) installé contre celui-ci est transférée sur un premier blanchet d'impression (33) des blanchets d'impression (33) agencés sur la périphérie de la roue segmentée (03), caractérisé en ce que la première encre (69) transférée sur le premier blanchet d'impression (33) des blanchets d'impression (33) agencés sur la périphérie de la roue segmentée (03) est fractionnée sur le cliché d'impression (68) d'un second cylindre porte-plaque (04) agencé après le premier cylindre porte-plaque (04) dans la direction de rotation de la roue segmentée (03), dans lequel une seconde encre (69) différente de la première encre (69) est appliquée sur le cliché d'impression (68) du second cylindre porte-plaque (04) avec un second mécanisme d'encrage (06) installé contre celui-ci, dans lequel la première encre (69) appliquée par fractionnement et la seconde appliquée par le second mécanisme d'encrage (06) respectivement sur le cliché d'impression (68) du second cylindre porte-plaque (04) sont transférées ensemble sur un second blanchet d'impression (33), dans lequel les encres (69) différentes appliquées sur le cliché d'impression (68) du second cylindre porte-plaque (04) sont appliquées sur ce cliché d'impression (68) dans des zones contiguës les unes aux autres différentes et se mélangent dans leur zone limite (71) respective, dans lequel les encres (69) appliquées sur le cliché d'impression (68) du second cylindre porte-plaque (04) sont transférées sur le second blanchet d'impression (33) au moment de l'apparition de leur mélange survenu dans leur zone limite (71) respective, dans lequel le premier mécanisme d'encrage (06) encre au moins un premier emplacement d'image imprimée formé sur le cliché d'impression (68) du premier cylindre porte-plaque (04) et le second mécanisme d'encrage (06) encre au moins un second emplacement d'image imprimée formé sur le cliché d'impression (68) du second cylindre porte-plaque (04), dans lequel le second emplacement d'image imprimée formé sur le cliché d'impression (68) du second cylindre porte-plaque (04) comprend, du fait de ses position et taille, la zone dans laquelle respectivement une encre de la surface respective du au moins un emplacement d'image imprimée formé sur le cliché d'impression (68) du premier cylindre porte-plaque (04) est transférée ou fractionnée.
  2. Procédé selon la revendication 1, caractérisé en ce que les vitesses périphériques respectives tant du premier cylindre porte-plaque (04) et du rouleau d'encrage (07) qui encre le cliché d'impression (68) agencé sur ce premier cylindre porte-plaque (04) que les vitesses périphériques respectives du second cylindre porte-plaque (04) et du rouleau d'encrage (07) qui encre des clichés d'impression (68) agencés sur ce second cylindre porte-plaque (04) sont respectivement réglées en synchronie les unes par rapport aux autres, dans lequel tant le premier cylindre porte-plaque (04) et le rouleau d'encrage (07) qui encre son cliché d'impression (68) que le second cylindre porte-plaque (04) et les rouleaux d'encrage (07) qui encre les clichés d'impression (68) de celui-ci se comportent respectivement par synchronie angulaire les uns par rapport aux autres.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'un synchronisme est réglé pour tous les groupes d'impression (73) qui présentent respectivement le cylindre porte-plaque (04) concerné et mécanismes d'encrage (06) qui présentent respectivement les rouleaux d'encrage (07) concernés, participant à une production, à chaque stade du processus de production concerné.
  4. Procédé selon la revendication 3, caractérisé en ce que le synchronisme est présent pour tous les groupes d'impression (73) et mécanismes d'encrage (06), participant à une production, depuis le début de la production.
  5. Procédé selon la revendication 1 ou 2 ou 3 ou 4, caractérisé en ce que dans les mécanismes d'encrage (06) respectifs est respectivement utilisé un rouleau d'encrage (07) dont la longueur périphérique correspond à la longueur périphérique du cylindre porte-plaque (04) respectif.
  6. Procédé selon la revendication 1 ou 2 ou 3 ou 4 ou 5, caractérisé en ce que pour encrer le cliché d'impression (68) est respectivement utilisé un mécanisme d'encrage (06) installé contre le cylindre porte-plaque (04) respectif avec respectivement uniquement un seul rouleau d'encrage (07).
  7. Procédé selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6, caractérisé en ce que pour encrer le cliché d'impression (68) est respectivement utilisé un mécanisme d'encrage (06) installé contre le cylindre porte-plaque (04) respectif avec un train de rouleaux composé au maximum de cinq rouleaux.
  8. Procédé selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7, caractérisé en ce que pour l'encrage du premier cylindre porte-plaque (04) est utilisé un rouleau d'encrage (07) enrobé sur toute la surface.
  9. Procédé selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7 ou 8, caractérisé en ce que pour l'encrage du second cylindre porte-plaque (04) est utilisé un rouleau d'encrage (07) enrobé sur toute la surface ou un rouleau d'encrage (07) revêtu de renfoncements aménagés contre sa surface d'enveloppe en fonction de l'image imprimée à imprimer, dans lequel le rouleau d'encrage (07) du second mécanisme d'encrage (06) qui encre le cliché d'impression (68) du second cylindre porte-plaque (04) présente respectivement un renfoncement contre la surface respective qui correspond au au moins un premier emplacement d'image du cliché d'impression (68) agencé sur le premier cylindre porte-plaque (04).
  10. Procédé selon la revendication 1 ou 2 ou 3 ou 4 ou 5 ou 6 ou 7 ou 8 ou 9, caractérisé en ce que pour imprimer les corps creux (01) sont utilisés des blanchets d'impression (33) avec des renfoncements aménagés.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que les renfoncements sont respectivement aménagés par gravure mécanique ou par laser dans la surface d'enveloppe des rouleaux d'encrage (07) utilisés pour l'encrage du second cylindre porte-plaque (04) et/ou des blanchets d'impression (33) utilisés pour imprimer les corps creux (01).
EP18702991.3A 2017-02-15 2018-02-01 Procédé d'impression de corps creux Active EP3582968B8 (fr)

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DE102017202381.3A DE102017202381A1 (de) 2017-02-15 2017-02-15 Verfahren zum Bedrucken von Hohlkörpern
PCT/EP2018/052503 WO2018149652A1 (fr) 2017-02-15 2018-02-01 Procédé d'impression de corps creux

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US20200039269A1 (en) 2020-02-06
DE102017202381A1 (de) 2018-08-16
US10661590B2 (en) 2020-05-26
EP3582968B8 (fr) 2021-03-24
WO2018149652A1 (fr) 2018-08-23
EP3582968A1 (fr) 2019-12-25

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