DE102019125130B4 - Device for printing the respective outer surface of hollow bodies - Google Patents

Abstract

Device for printing on the respective lateral surface of hollow bodies (01), with a mandrel wheel (02) having a plurality of holding devices, a hollow body (01) being able to be arranged on each of these holding devices, with a mechanical friction brake being arranged in the periphery of the mandrel wheel (02). , wherein a friction body (96) of the friction brake is arranged to brake at least one rotating hollow body (01) held on one of the holding devices of the mandrel wheel (02) by friction, the friction body (96) of the friction brake being positioned relative to the one on one of the holding devices of the mandrel wheel (02 ) held hollow body (01) is moved, wherein the movement of the friction body (96) of the friction brake has a tangential speed component to the lateral surface of the hollow body (01), with a rotating or at least rotatable component in the transport direction of the hollow body (01) after the mandrel wheel (02). Transfer disc (92) held on the mandrel wheel (02) for transfer en hollow bodies (01), characterized in that the movement of the friction body (96) of the friction brake having the tangential speed component is mechanically coupled to the rotational movement of the transfer disc (92).

Description

The invention relates to a device for printing the respective lateral surface of hollow bodies according to the preamble of 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 lateral surface, mostly several printing units are used. Each of these printing units transfers one printing ink to a printing blanket that is used jointly by these printing units. The lateral surface of the hollow body in question is then pressed by a relative movement between the lateral surface of the hollow body in question and the printing blanket, which was previously in particular multicolored inked, in particular by rolling the lateral 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 for decorating hollow bodies, in particular each having a preferably cylindrical lateral surface, is used, for. B. in connection with a production plant usually having several workstations for the manufacture and further processing of such hollow bodies, whereby the printing or the decoration of the hollow bodies takes place by means of an industrially executed or at least executable printing process, which is why these hollow bodies can generally also be referred to as printed products. In such a production plant, the hollow bodies to be printed are mass-produced with e.g. B. several hundred or even a few thousand pieces per minute, z. B. between 1,500 and 2,500 pieces per minute, particularly preferably between 1,800 and 2,200 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 z. B. used as beverage cans or as aerosol cans. Such hollow bodies made of plastic are z. B. in the form of thermoplastic moldings and z. B. as a cup for packaging z. B. of liquid or pasty food, especially dairy products or beverages. However, the respective hollow body can also be a round tube body made either from plastic or from aluminum, a tube being understood as an elongate, solid but malleable container which is provided for filling with a particularly paste-like substance. Aluminum tubes are z. B. produced in a reverse extrusion process. Plastic tubes are z. B. each made as seamless tubes by extrusion. Another type of hollow bodies to be printed in an aforementioned device can be made of glass, preferably cylindrical containers or vessels, e.g. B. bottles or flasks.

Beverage cans are preferably made of aluminum and are i. i.e. R. so-called two-piece cans, in which a circular bottom together with a preferably straight cylinder jacket each from a single workpiece, d. H. from a so-called slug or from a round, d. H. a circular disk, in a forming process, e.g. B. in a cold extrusion process or in a compression molding process, preferably by deep drawing, in particular by ironing, to a hollow body open on one side, d. H. are made into a so-called raw can and in a manufacturing step carried out at the end of production, a circular lid is placed on the cylinder jacket and connected airtight to the cylinder jacket by flanging.

Another type of can are tin cans. Tinplate is a tinned sheet of steel. For the production of tinplate cans, 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 to protect against corrosion. Tin cans are so-called three-piece cans. In order to produce the shell of a tinplate can, a rectangular strip of sheet steel is bent into a preferably straight cylindrical shell, the ends of this strip bent into a cylindrical shell being butt-welded. A circular base and a circular cover are then placed on the cylinder jacket and the edges are flanged. In order to obtain a higher resistance to indentation for the tinplate can in question, z. B. all three parts, i. H. the cylinder jacket, the base and the cover preferably have a corrugated profile.

An aerosol can, also known as a spray can or spray can, is a metal can for spraying liquids. In an aerosol can, the filled liquid is under pressure, with z. B. propane, butane, dimethyl ether or mixtures thereof or compressed air or nitrogen is used.

The aforementioned WO 2012/148576 A1 describes a device for decorating cans, an arrangement of several printing units, each with an inking unit, being provided for the multicolored decoration of a large number of cans. Each of the inking units belonging to one of the printing units has an ink fountain for providing printing ink, with each ink fountain is provided with an ink fountain roller for receiving the printing ink from the relevant ink fountain. In each inking unit there is one ink ductor, with the ink ductor picking up printing ink from the respective ink fountain roller, with several iridescent ink distributor rollers and several ink transfer rollers each cooperating with at least one of the ink distributor rollers being provided in a roller train following the respective ink ductor in the inking unit concerned. A plate cylinder with at least one printing plate is provided for each inking unit, with only a single inking roller interacting with the respective plate cylinder for applying the printing ink.

through the U.S. 4,741,266 A is known an apparatus for decorating cans, having a plurality of inking stations and plate cylinder means, each of the plate cylinder means being separately driven by a main gearbox, the main gearbox being associated with a pressure roller means so as to be completely independent of the roller drive means of each inking station.

through the WO 2018/013465 A1 a decorator with a mandrel wheel, a segment wheel, a transfer disc and a transport chain is known, the mandrel wheel, the segment wheel, the transfer disc and the transport chain each having a motor and a decoder, a controller being provided, the controller being based on a the information received from the decoders adapts or sets the respective speed of the mandrel wheel, the segment wheel, the transfer disc and the transport chain.

through the DE 10 2018 201 033 B3 a device for decorating hollow bodies is known, a braking belt being provided in the periphery of the mandrel wheel in the transport direction of the hollow bodies after a paint application roller of a painting device, the braking belt being arranged to brake at least one rotating hollow body held on one of the holding devices of the mandrel wheel by friction.

through the DE 10 2014 213 805 B3 an inking unit of a printing unit is known, wherein the inking unit has an anilox roller receiving ink from an ink reservoir and an inking roller that can be placed against a printing forme cylinder of the printing unit, wherein an outer diameter of the inking forme roller and an outer diameter of the printing forme cylinder covered with at least one printing forme are the same in terms of amount, the printing forme cylinder and the anilox roller are each independently driven in rotation by a motor whose respective speed can be regulated, the inking roller being rotationally driven by the anilox roller by friction, a rotary encoder which detects the speed of the inking roller being provided, a control unit being provided, this control unit based on the signal generated by the rotary encoder, the speed of the inking roller by means of the rotation of the anilox roller adjusts or adjusts in such a way that synchronization between the printing forme cylinder and the inking application roller is set so that the peripheral speed of the inking roller matches the peripheral speed of the printing forme cylinder within previously specified permissible tolerance limits.

through the US 2,470,243A a ribbon printing device is known comprising a frame, an impression cylinder mounted in the frame for rotation about a fixed axis, a type cylinder which cooperates with the impression cylinder and is arranged in the frame for its rotation on a shaft arranged beyond the circumference of the impression cylinder, a drive sleeve for the type cylinder surrounding but spaced from the shaft thereof, means for making longitudinal adjustment of the type cylinder from the drive sleeve and over the surface of the impression cylinder and a pair of normally stationary but relatively adjustable eccentric sleeves which inserted into the space between the drive sleeve and the shaft for movement of the type cylinder towards or away from the impression cylinder.

The object of the invention is to create a device for printing the respective outer surface of hollow bodies.

The object is achieved according to the invention by the features of claim 1. The dependent claims relate to advantageous developments and refinements of the solution found.

An embodiment of the invention is shown in the drawings and is described in more detail below. Advantages attainable with the invention are mentioned in connection with the exemplary embodiment.

• 1 eine Vorrichtung zum Bedrucken bzw. zur Dekoration der jeweiligen Mantelfläche von Hohlkörpern;
• 2 die Vorrichtung gemäß der 1 mit mehreren Einzelantrieben;
• 3 die Vorderseite einer Anordnung mit einer Kopplung der Bewegung eines Reibkörpers einer Reibungsbremse mit der Rotationsbewegung einer Transferscheibe;
• 4 die Rückseite der Anordnung der 3 mit der Kopplung der Bewegung des Reibkörpers der Reibungsbremse mit der Rotationsbewegung der Transferscheibe;
• 5 eine Draufsicht auf die Anordnung gemäß den 3 und 4.

Show it:

• 1 a device for printing or for decorating the respective lateral surface of hollow bodies;
• 2 the device according to the 1 with several individual drives;
• 3 the front of an arrangement with a coupling of the movement of a friction body a friction brake with the rotational movement of a transfer disk;
• 4 the back of the arrangement of the 3 with the coupling of the movement of the friction body of the friction brake with the rotational movement of the transfer disk;
• 5 a top view of the arrangement according to FIG 3 and 4 .

The printing of the lateral surface of a hollow body with a z. B. multicolored print motif, d. H. at least one printed image, takes place in a preferred embodiment in a letterpress process. Alternative or additional printing processes are e.g. B. a screen printing process or an offset printing process or a formless digital printing process. In the following, the invention is described by way of example in connection with an indirect letterpress process in which printing ink is first applied to a printing blanket and only from there to the lateral surface of a hollow body. To carry out this special letterpress process, a printing plate is arranged as a printing form on a lateral surface of a plate cylinder, which is why this cylinder is sometimes also referred to as a plate cylinder, especially if the printing plate z. B. is arranged on a mounted on the cylinder sleeve sleeve or is. The more general term “printing forme cylinder” used below should in principle include both embodiments, i. H. the classic version as a plate cylinder as well as the version as a "cliché cylinder". The printing block ready for use in the printing process is a printing form with a printing relief, this printing relief being the print image intended for the printing process of the indirect letterpress method, in contrast to the classic, i. H. direct letterpress method reproduces unmirrored, wherein in a trouble-free printing operation only the printing relief is involved in the transfer of the printing ink supplied by the inking unit to the plate cylinder on at least one printing blanket cooperating with this plate cylinder. The printing form or the printing plate to be mounted on a plate cylinder has, for. B. a plate-shaped preferably flexible support finite length z. B. from a sheet steel, wherein 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 e.g. B. according to the curvature of the lateral surface of the plate cylinder may be pre-bent or angled to facilitate assembly of the printing forme, d. H. to allow here in particular the printing plate on the plate cylinder. The carrier of the printing form or the printing plate has a thickness in the range of z. 0.2mm to 0.3mm. The pressure plate has, including its carrier, a total thickness in the range of z. 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 to produce the printing block that can be used for the printing process, e.g. B. exposed with a negative film depicting the print image, with unexposed areas then being removed from the print body, e.g. B. be removed by washing or by means of a laser.

A device for printing or decorating hollow bodies each having a preferably cylindrical lateral surface is also referred to as a decorator and 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 have an inking unit and a rotatable printing forme cylinder, in particular a printing forme cylinder designed as a plate cylinder. The printing units or printing stations, together with the printing forme cylinders, are each stored in a frame in this device and can be used in the same printing process in order to form a multicolored print motif on the same hollow body, depending on the number of printing units or printing forme cylinders involved. The storage of the printing forme cylinder or plate cylinder is preferably carried out at both ends, but it can also be designed as a cantilever mounting, in which the printing forme cylinder or plate cylinder in question is only on one of its end faces, e.g. B. is mounted on a preferably conical pin. As a rule, only a single printing plate is arranged on the outer surface of each printing forme cylinder, with the carrier of the printing plate enclosing the circumference of the relevant printing forme cylinder completely or at least for the most part, in particular more than 80%. A length of the printing body of the printing block directed in the peripheral direction of the relevant printing forme cylinder is preferably shorter than the peripheral length of the relevant printing forme cylinder. The printing form or the printing cliché is or at least can be arranged magnetically on the lateral surface of each printing form cylinder by means of its carrier, ie the printing form or the printing cliché is preferably held there magnetically, ie by means of a magnetic holding force. In an alternative or supplementary embodiment variant of the device for printing or for decorating hollow bodies, each having a preferably cylindrical lateral surface, at least one of the printing units or several of these printing units are each designed as a printing unit that prints without a printing form in a digital printing process, with such a printing unit in particular which has at least one inkjet print head or a laser.

The particular simultaneous transfer of a plurality of printing inks, in particular to the lateral surface of the hollow body in question, requires that this ink transfer takes place in register in order to achieve good print quality in the printing process. For a register-accurate arrangement of the printing forme or the printing block on the outer surface of the printing forme cylinder or plate cylinder in question, in the preferred embodiment several z. B. in their respective position adjustable dowel pins are provided, which engage in corresponding recesses formed on the printing forme or on the printing plate and the printing forme or the printing plate as a result when it is arranged on the lateral surface of the printing forme cylinder or plate cylinder in question there give a defined position. In particular, a side register of the printing form or the printing plate on a z. B. cut side edge of this printing form or this printing block and a circumferential register of this printing form or this printing block can be aligned with a stop. In a preferred embodiment, each printing form 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 printing form cylinder or plate cylinder in question 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 relevant printing form cylinder or plate cylinder has a width in the axial direction of the relevant plate cylinder in the range of 150 mm to 200 mm, preferably about 175 mm.

Each of the z. B. designed as a plate cylinder printing forme cylinder transfers with its printing forme or with its printing block in each case a specific ink on a blanket. The printing inks used are usually pre-mixed, in particular order-specific special inks, which are used e.g. B. are matched in terms of their respective printability in a special way on the material of the hollow body to be printed, depending on whether a surface z. B. aluminum, a tinplate or a plastic is printed. These order-specific special colors also usually differ in their respective shade. In a preferred embodiment of a device for printing or for decorating each z. B. a cylindrical lateral surface having hollow bodies, a printing ink from the printing forme or the printing block to the lateral surface of the hollow body in question is provided transferring device. This ink-transferring device is preferably designed as a segmented wheel rotating about a horizontal axis in particular, wherein on the periphery of this segmented wheel, ie along its circumference, preferably several, e.g. B. eight, ten, twelve or even more blankets are arranged or at least can be arranged. As an alternative to the segmented wheel, depending on the printing process used, the ink-transferring device can also be designed as a decoration drum or as a printing blanket cylinder or as a transfer cylinder, which can each be rotated about an axis of rotation, at least during printing. The arrangement of the printing blankets on the circumference of the segmented wheel takes place e.g. B. in that the printing blankets on the circumference of the segmented wheel each z. B. are attached by a material connection, preferably by gluing. The preferably several printing forme cylinders or plate cylinders are or at least can be placed radially on the printing blankets arranged on the circumference of the relevant segmented wheel. In a particularly preferred embodiment of a device for printing or for decorating a z. B. cylindrical outer surface having hollow bodies - ie a decorator - is arranged along the circumference of the segmented wheel one behind the other a larger number of printing blankets than radially employed or at least adjustable printing forme cylinders or plate cylinders are provided on the segmented wheel. The preferably carousel-like ink-transferring device, in particular the segmented wheel has a diameter of z. B. 1400 mm to 1600 mm, preferably about 1520 mm to 1525 mm, and has at z. B. eight associated printing form cylinders or plate cylinders on its circumference in a row z. B. twelve printing blankets. The surface of each printing block 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, ie without profiling. In an operating state in which the printing forme cylinders or plate cylinders involved in the printing process are each set radially against the printing blankets of the rotatively driven segmented wheel, the respective printing formes of these printing forme cylinders or the respective printing blocks of these plate cylinders roll off on the printing blankets moved with the segmented wheel, with the printing blocks press at least their printing relief into the respective printing blanket or at least press it on. An intensity of the indentation is z. B. before or at the beginning of a printing process z. B. by means of a remote control by setting one of the relevant printing forme cylinder or plate cylinder on the subject fende blanket of the segmented wheel pressure exerted adjustable or is set in such a way.

The hollow body to be printed here as an example, e.g. B. the two-part cans to be printed, z. B. by means of a hollow body to be printed preferably along at least part of a circular path, d. H. a circular arc about an axis of rotation, preferably by means of at least one feed wheel, in particular by means of a mandrel wheel, continuously or in a set cycle to at least one of the printing units belonging to the device for printing a lateral surface of hollow bodies and thus into a printing area of at least one of these Printed works transported. In particular, the hollow bodies to be printed are each attached to at least one of the z. B. on the segmented wheel arranged printing blankets, or the hollow bodies to be printed are each directly and immediately by means of this transport device, d. H. without the help of a z. B. designed as a segment wheel ink-transferring device transported in the respective printing area of at least one of these printing units, which z. B. is the case when the printed matter in question in a direct printing process, z. B. prints in an inkjet printing process.

That like e.g. B. the segmented wheel also rotates around a preferably horizontal axis feed wheel or mandrel wheel has concentrically to its circumference in preferably equidistant distribution several, z. B. 24 or 36 holding devices - in short: holder - z. B. each in the form of a mandrel projecting from a front side of the mandrel wheel or a spindle, wherein one of the hollow bodies to be printed is held or at least can be held by each holder. A transport device designed as a mandrel wheel is sometimes also referred to as a turntable with spindles. A mandrel wheel is z. B. in the EP 1 165 318 A1 described. A description of suitable holders, spindles or mandrels can be found e.g. B. in the WO 2011/156052 A1 . In the following, each mandrel is referred to as a mandrel for short. A longitudinal axis of each mandrel is directed parallel to the axis of the mandrel wheel. In the case of each z. B. designed as a two-piece can to be printed hollow bodies, each of these hollow bodies z. B. by means of a conveyor, z. B. a belt conveyor and / or a conveyor wheel to which z. B. trained as a mandrel wheel transport device and there at a transfer station z. B. pulled up sucking by means of vacuum on one of the mandrels of the mandrel wheel and then held by the mandrel in question, while designed as a mandrel wheel transport means the respective hollow body to be printed z. B. to the occupied with at least one blanket segment wheel and thus transported in the direction of at least one of the printing units or in an alternative embodiment z. B. transported directly to at least one of the printing units without segment wheel. i.d. R. are fed to the mandrel wheel with the conveyor in rapid succession in rapid succession to a larger amount of hollow bodies to be printed. A conveyor is z. B. in the EP 1 132 207 A1 described.

A gap with a width of less than 1 mm, z. B. formed of 0.2 mm, so that the hollow body to be printed is not held by a pressure on the mandrel in question. Each mandrel can be rotated almost smoothly around its respective longitudinal axis. Each of the mandrels is driven by a drive means cooperating with the respective mandrel, e.g. B. by means of friction to a specific peripheral speed or is at least adjustable such that each hollow body to be printed held by a mandrel is arranged to rotate or at least can be rotated in addition to the rotation of the mandrel wheel by a rotation performed or at least executable independently by the mandrel. The hollow body to be printed is placed on one of the mandrels of the mandrel wheel preferably during a standstill phase of the relevant mandrel, with 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 occupancy of a mandrel with a hollow body to be printed, the mandrel wheel z. B. moves in such a way that contact of the relevant free mandrel and optionally a few other mandrels is reliably avoided with a printing blanket of the segmented wheel.

Two-piece cans to be printed are z. B. to the mandrel wheel in a processing station upstream of the mandrel wheel, e.g. B. deep-drawn from a blank. In a further processing station, the edge of each two-part can is trimmed at its open end. Each two-part can is processed in further processing stations, e.g. B. washed, especially its interior 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-piece can is z. B. primed, especially with a white primer. To the printing of its lateral surface, each two-part can from its respective holder z. B. on the mandrel z. B. removed by compressed air or by a preferably switchable magnet and fed to at least one processing station downstream of the mandrel wheel, e.g. B. a painting station for painting the outer surface of each printed two-piece can and / or an edge processing station. The printed two-part cans pass through a dryer, e.g. B. a hot air dryer to cure the at least one applied to their respective lateral surface printing ink.

The printing process for printing in particular the respective lateral surface of z. B. held on the mandrel wheel hollow bodies, especially two-part cans, begins with the fact that all the inks required for the print image to be printed on the respective lateral surface of the hollow body z. B. from the respective printing block z. B. applied to the segmented wheel employed plate cylinder on the same of one of the arranged on the periphery of the segmented wheel printing blankets. The printing blanket in question, which has been inked with all the necessary printing inks in this way, then transfers these printing inks simultaneously during a single rotation of the hollow body to be printed, which is held on one of the mandrels of the mandrel wheel, about its longitudinal axis to the lateral surface of this hollow body in a physical contact between the printing blanket and the lateral surface of the hollow body to be printed. The z. B. held by one of the mandrels of the mandrel wheel to be printed hollow body with an equal peripheral speed as the relevant z. B. at the periphery of the segmented wheel arranged printing blanket. The respective circumferential speeds of the hollow body and the blanket or segmented wheel are therefore synchronized with one another, with the z. B. held on one of the mandrels of the mandrel wheel to be printed hollow body in particular by a driving means acting on the relevant mandrel z. B. from its standstill in particular until reaching the peripheral speed z. B. the segmented wheel is accelerated accordingly, the peripheral speed of the mandrel in question of the mandrel wheel preferably starting from a first point of contact of the hollow body to be printed with the printing blanket in question during the unrolling of its lateral surface over a distance z. B. is synchronized from the first 50 mm of the circumferential length of the blanket with the peripheral speed of the segmented wheel. In the preferred embodiment, the segmented wheel carrying the blanket in question gives the z. B. on the respective mandrel of the mandrel wheel to be set peripheral speed. The peripheral speed of the printing forme-carrying printing forme cylinder or of the plate cylinder carrying the printing plate is or is preferably a function of the peripheral speed z. B. the segment wheel. In the preferred embodiment, at least the mandrel wheel and the segmented wheel are each driven individually by their own drive and their respective rotational behavior is controlled or regulated by a control unit.

With reference to the previously described device for printing or decorating in particular one z. B. cylindrical lateral surface having hollow bodies are explained below by way of example, various details. 1 shows a simplified schematic representation and example of a device for printing on or decorating hollow bodies 01, e.g. B. two-piece cans 01, these hollow body 01 with a conveyor sequentially z. g. as a rotating or at least rotatable feed wheel, in particular as a mandrel wheel 02, and held there individually on this transport device on a holder designed as a mandrel or as a spindle. Based on the exemplary embodiment chosen for the printing press or the device for printing on hollow bodies, it is assumed below that this transport device is preferably embodied as a mandrel wheel 02 that rotates or is at least rotatable about an axis of rotation 41. An ink-transferring device, e.g. g. a segmented wheel 03 that rotates or is at least rotatable about an axis of rotation 34, along the circumference of which a plurality of printing blankets 33 are arranged one behind the other. In association with the segmented wheel 03 mentioned by way of example, a plurality of printing forme cylinders 04, in particular plate cylinders 04, which are or at least can be thrown radially onto this segmented wheel 03 are provided along its circumferential line, with a printing forme, in particular a printing block, being arranged on the respective lateral surface of this printing forme cylinder 04 or plate cylinder 04 , This printing plate being designed in particular to carry out a letterpress process. Each of the printing forme cylinders 04 or plate cylinders 04 is supplied with a specific printing ink by means of an inking unit 06 for inking its printing forme or printing plate. It is assumed below, for example, that the printing forme cylinders 04 are each embodied as a plate cylinder 04 carrying at least one printing block.

Several z. B. eight, ten or twelve printing units, each preferably printing different inks, are arranged with a plate cylinder 04 and an inking unit 06, with each inking unit 06 preferably being designed as a short inking unit and e.g. B. has only a single inking roller 07 and an anilox roller 08 ( 2 ). On the circumference of the segmented wheel 03, several, e.g. B. 12 printing blankets 33 are arranged, with a mandrel wheel 02 having 24 holding devices being set to rotate at half the speed compared to a segmented wheel 03 with 12 segments 32. Each of the printing blankets 33 arranged on a segment 32 on the circumference of the segmented wheel 03 is z. B. as a metal printing blanket and is preferably held by a magnetic force on the relevant segment 32 of the segmented wheel 03. The segmented wheel 03 preferably has a base body, the plurality of z. B. twelve segments 32 along the circumference of the body z. B. each at a joint in particular each spaced apart from each other or at least can be arranged. In the preferred embodiment, the segmented wheel 03 is therefore not designed in one piece, with segments 32 already formed on it. B. by releasing at least one connecting element.

In the preferred embodiment, each of the printing blankets 33 to be arranged on segmented wheel 03 is mounted on a preferably flat, tabular metal support with a material thickness of e.g. B. 0.2 mm cohesively, in particular applied by gluing. The respective, preferably magnetizable, metal carrier, together with the printing blanket 33 arranged on it, is then mounted on one of the segments 32 on the circumference of the segmented wheel 03, e.g. B. by at least one holding magnet provided there on the circumference for each printing blanket 33 or its carrier, in particular arranged in the correct position. In order to support the correct positioning of the respective metal carrier on the relevant segment 32 on the circumference of the segmented wheel 03, e.g. B. on the leading edge 37 of the respective metal carrier in the direction of rotation of the segmented wheel 03, an acute-angled suspension leg 38 is provided, with this suspension leg 38 being arranged on one of the segments 32 on the circumference of the segmented wheel 03 in one on the circumference of this segmented wheel 03 parallel to its axis of rotation 34 directed z. B. designed as a groove engages recess 36 and comes into contact with a leading edge 39 of the relevant recess 36 in the direction of rotation of the segmented wheel 03, in particular in a form-fitting manner. The printing blankets 33 are each preferably designed as a rubber blanket. The direction of rotation of the segmented wheel 03 during the printing process is in the 1 indicated by an arrow indicating the direction of rotation. During the printing process, the hollow bodies 01, which are guided by the mandrel wheel 02 rotating about the axis of rotation 41 on a mandrel to the segmented wheel 03, are moved individually and one after the other briefly, i.e. usually for a single revolution of the hollow body 01 to be printed, to the current one in question by a primarily radial movement of the mandrel in question printing blanket 33 pressed.

2 shows a simplified and schematic embodiment of the device for printing hollow bodies 01, in which a plurality of hollow bodies 01 are fed sequentially with a conveyor device 74 in the transport direction indicated by an arrow to a conveyor wheel 76 and from there to the mandrel wheel 02 and then to the segmented wheel 03. The feed wheel 76 and the mandrel wheel 02 form a device for sequentially feeding the hollow bodies 01 to the circumference of the segmented wheel 03. On the circumference of the feed wheel 76, several z. B. eight or ten drivers and on the circumference of the mandrel wheel 02 are several, z. B. 24 or 36 holding devices are each arranged to accommodate one hollow body 01 to be printed in cooperation with the segmented wheel 03. The drivers of the feed wheel 76 are z. B. formed by recesses on its periphery, each recess always receive exactly a single hollow body 01 at a certain point in time and can convey during the rotation of the conveyor wheel 76. The inclusion of a hollow body 01 in the relevant recess of the conveyor wheel 76 is z. B. supported by an air blast device 98 arranged in the periphery of the feed wheel 76, with at least one air blast being triggered by the air blast device 98, which pushes the hollow body 01 in question, in the direction of the feed wheel 76, depending on an angular position of the feed wheel 76. In an advantageous embodiment, the feed wheel 76 is designed as a star wheel with a plurality of carriers, each in the form of pointed prongs, with a hollow body 01 received in a space between adjacent prongs being conveyed during the rotation of the star wheel.

The mandrel wheel 02 and the feed wheel 76 each have a separate from the drive 13 of the segmented wheel 03 each z. B. designed as a motor drive 77; 78, wherein the drive 13 of the segment wheel 03 and the drive 77 of the mandrel wheel 02 and the drive 78 of the feed wheel 76 data through a common data bus 79 are technically connected. This drives 13; 77; 78 connecting preferably digital data bus 79 is z. B. formed in a ring topology or in a star topology. It controls a connected to the data bus 79, z. g. as a central machine control unit 82, by means of control data transported via the common data bus 79, at least both the drive 78 of the feed wheel 76 and the drive 77 of the mandrel wheel 02, preferably also the drive 13 of the segmented wheel 03 and others, in particular all of them on this data bus 79 connected drives. In a decorator with several individual drives connected via a common data bus 79, e.g. B. the drive 77 of the mandrel wheel 02 or the drive 13 of the segment wheel 03 are each defined as the master, so that the other drives are each aligned as slaves in their respective rotational behavior according to the previously defined master. At least one pair of discrete angular positions φ1; φ2, which consists of a first angular position φ1 occupied or to be occupied by one of the carriers on the circumference of feed wheel 76 and a second angular position φ2 occupied or to be occupied by one of the holding devices on the circumference of mandrel wheel 02, in each case on a respective hollow body 01 from feed wheel 76 to the Mandrel wheel 02 transferring transfer position 81, each with reference to this transfer position 81 fixed to each other. This means that the relevant pair of angular positions φ1; angular positions φ1 forming φ2; φ2 remain unchanged during each rotation of feed wheel 76 and mandrel wheel 02 with respect to transfer position 81, preferably for all carriers of feed wheel 76 and all holding devices on the circumference of mandrel wheel 02, which are used at least during production of the device for printing on the hollow bodies 01 are to be positioned in each case at the transfer position 81 transferring the respective hollow body 01 from the feed wheel 76 to the mandrel wheel 02. Via the data bus 79 to the respective drive 13; 77; 78 preferably comprise at least one angular position to be assumed by its shaft and/or the respective speed of the shaft of the relevant drive 13; 77; 78. With reference to the relevant decorator, this control data thus e.g. B. the function of a virtual leading axis. The control data transported via the virtual master axis are a command variable for the axes to be coordinated of the drives 13 connected to this data bus 79; 77; 78. From the control data forming a position value of the virtual master axis, ie the master value of the virtual master axis, for each through the drives 13; 77; 78 a position setpoint is calculated for the given following axis. At least the drive 77 of the mandrel wheel 02 and the drive 13 of the segmented wheel 03 and, if applicable, also the drive 78 of the feed wheel 76 are each designed as an electrical direct motor drive whose position is controlled by the control unit 82 and/or whose respective speed is set. The drive 13 of the segment wheel 03 is z. B. designed as a torque motor. In an advantageous embodiment, at least the respective drives 13; 77; 78 of the feed wheel 76, mandrel wheel 02 and segment wheel 03 are each assigned their own drive controller 83 connected to the data bus 79 and their own power unit 84.

The respective z. The hollow bodies 01, e.g. by means of vacuum suction, are successively placed one after the other on one of the mandrels of the mandrel wheel 02 and then held by the mandrel in question respective longitudinal axis rotatable and in particular set or at least adjustable to a specific peripheral speed. In a preferred embodiment, at least one hollow body 01, preferably a plurality of hollow bodies 01 each held on one of the mandrels of the mandrel wheel 02, are held in place prior to being printed on using at least one of the printing blankets 33 arranged on the circumference of the segmented wheel 03, e.g. e. H. rotated by friction and adjusted to the peripheral speed required for the printing process. This acceleration belt 86 preferably has its own drive 13; 77; 78 of the feed wheel 76, the mandrel wheel 02 and / or the segment wheel 03 separate, but z. B. also connected to the data bus 79 drive 87, wherein the peripheral speed of the acceleration belt 86 is optionally adjustable. The peripheral speed of the acceleration belt 86 is thus z. B. individually adjustable and / or changeable for each hollow body 01 depending on the requirements of the printing process. The drive 87 of the acceleration belt 86 is z. B. assigned its own drive controller 83 and its own power unit 84.

At least one processing station arranged in the periphery of the mandrel wheel 02 after the printing of the hollow body 01 is z. B. as a painting device 88 for painting the outer lateral surface of each printed hollow body 01 and/or, in particular, in the case of two-piece cans formed an edge processing station. The processing station embodied as painting device 88 has a paint application roller 89 that is or at least can be placed on the lateral surface of at least one of the printed hollow bodies 01 held by mandrel wheel 02. Lacquer application roller 89 of lacquering unit 88 is preferably driven in rotation by its own drive 91, with a hollow body 01 held on mandrel wheel 02 being rotated by means of friction in Rotation offset and z. B. is set to a specific peripheral speed depending on the requirements of the painting process. In particular, the peripheral speed of the hollow body 01 by the drive 91 of the paint application roller 89 is independent of the drives 13; 77; 78 of the feed wheel 76, the mandrel wheel 02 and/or the segment wheel 03 is set or at least adjustable. Advantageously, the drive 91 of the paint applicator roller 89 is also assigned its own drive controller 83 and its own power unit 84 .

In the embodiment of the invention is in the periphery of the mandrel wheel 02, z. A mechanical friction brake is arranged, e.g. The friction body 96 of the friction brake is moved relative to the rotating hollow body 01 held on one of the holding devices of the mandrel wheel 02, the movement of the friction body 96 of the friction brake having a tangential speed component to the outer surface of the hollow body 01. In a preferred embodiment, the friction body 96 of the friction brake is embodied as a revolving braking belt 96 driven by a drive roller 97 and acting on at least one of the holding devices, with the braking belt 96 damaging at least one rotating hollow body 01 held on one of the holding devices of the mandrel wheel 02 by its action at least one of the holding devices of the mandrel wheel 02 is arranged to brake by friction. The braking belt 96 is preferably arranged to circulate on deflection rollers and is driven by the drive roller 97 with regard to its circulatory movement. At least one rotating hollow body 01 held on the mandrel wheel 02, which is braked by friction by the friction body 96 or the braking belt 96, has reached a peripheral speed required for further transport as a result of this braking process after it has been printed on by at least one of the printing blankets 33 arranged on the circumference of the segmented wheel 03 set. This peripheral speed of the hollow body 01 is independent of the drives 13; 77; 78; 91 of the feed wheel 76 and/or the mandrel wheel 02 and/or the segmented wheel 03 and/or the paint application roller 89 of the painting unit 88 is adjusted or at least adjustable. the z. B. as a braking band 96 friction body 96 of the friction brake enables an optimal braking process of the rotating hollow bodies 01 that are about to be passed on. This braking process is particularly advantageous or necessary at high rotational speeds of the mandrels in connection with mandrels for large-volume hollow bodies 01 with a high mass moment of inertia. The braking process significantly increases operational reliability when the hollow bodies 01 are transferred from the mandrel wheel 02 to another transport device.

In the transport direction of the hollow body 01, a z. g. as a rotatable transfer disc 92, is provided for receiving the hollow bodies 01 held on the mandrel wheel 02, printed by means of at least one of the printing blankets 33 arranged on the circumference of the segmented wheel 03 and possibly painted on their lateral surface. A peripheral speed of the transfer disk 92 is either by its own drive 73 ( 5 ) or e.g. B. depending on the rotation of the conveyor wheel 76 z. B. with the drive 78 of this conveyor wheel 76 z. B. adjusted or at least adjustable by means of a belt drive. In the latter case, the drive 73 of the transfer disk 92 z. B. with the drive 78 of the conveyor wheel 76 z. B. mechanically or electrically, in particular coupled in terms of control technology. In the alternative embodiment first mentioned above, the shaft of the transfer disk 92 is of its own, ie of the other drives 13; 77; 78; 87; 91 separate drive 73 driven in rotation, this drive 73 is preferably designed as a motor.

After the transfer disc 92 in the transport direction of the hollow body 01, there is preferably a further conveyor device 93 for conveying printed and/or painted hollow bodies 01, e.g. B. provided in a dryer, said conveyor 93 z. B. as a revolving transport chain 93 with several, z. B. twenty pickups is each designed to receive one of the hollow bodies 01 to be conveyed and preferably has its own drive 94, in particular a chain drive, with this drive 94 preferably being at least connected to the drives 13; 77; 78 of segment wheel 03, mandrel wheel 02 and feed wheel 76 connecting data bus 79 is connected. Also the drive 94 this conveyor 93 is z. B. assigned its own drive controller 83 and its own power unit 84.

According to the drive concept for a decorator described here as an example, at least the drives 13; 77; 78 of segment wheel 03, mandrel wheel 02 and feed wheel 76 are each designed as individual drives and are connected to one another via a common data bus 79. Advantageously, further individual drives connected to the common data bus 79 are provided in the device for printing on hollow bodies 01, e.g. B. the drive 87 for the acceleration belt 86 and/or the drive 91 for the paint applicator roller 89 of the painting device 88 and/or the possibly own drive 73 for the transfer disc 92 and/or the drive 94 for the transport chain 93. All these drives 13; 73; 77; 78; 87; 91; 94 are connected to the common data bus 79, z. B. as a central machine control unit 82 is controlled by means of control data transported via this common data bus 79, said control data preferably at least the respective speed of the shaft of the relevant drive 13; 73; 77; 78; 87; 91; 94 and at least one angular position to be assumed by its shaft. Trained as a central machine control unit 82 is z. B. formed as a belonging to the relevant decorator control station, with the relevant drives 13; 73; 77; 78; 87; 91; 94 required control data can be set at this control station.

In a preferred embodiment, the feed wheel 76, the mandrel wheel 02, the segment wheel 03 and the transfer disk 92 are controlled by their respective drives 13; 77; 78 are synchronized with one another by means of the control data transported via the shared data bus 79 in such a way that at a specific point in time at which the feed wheel 76 transfers a hollow body 01 to the mandrel wheel 02, another hollow body 01 already arranged on the mandrel wheel 02 is passing through one arranged on the segmented wheel 03 Printing blanket 33 is printed and yet another already printed hollow body 01 is transferred from the mandrel wheel 02 to the transfer disk 92.

An advantage of the drive concept using individual drives for a decorator instead of a central drive is the very high positioning accuracy that can be achieved in particular for the mandrel wheel 02 and the segmented wheel 03, which enables precise printing on the lateral surface of the hollow body 01. The separate drive 87 for the acceleration belt 86 enables the rotation of each individual hollow body 01 arranged on a mandrel of the mandrel wheel 02 to be controlled individually, with the rotation of the hollow body 01 in question being advanced or delayed in each case with respect to one arranged on the circumference of the segmented wheel 03 Printing blanket 33 is set or at least adjustable. The separate drive 94 for the transport chain 93 enables an exact counting of the transported hollow bodies 01 and/or a targeted ejection of faulty hollow bodies 01. The separate drives 73; 77; 78; 94 for the facilities directly involved in the transport of the hollow bodies 01, i. H. In particular, conveyor wheel 76, mandrel wheel 02, transfer disk 92 and/or transport chain 93 offer the advantage that the timing of the various transfer actions for transferring the hollow body 01 in question from one conveyor element to the other can be adjusted without mechanical intervention on the respective drive elements.

Advantageously, a motor 11 of the plate cylinder 04 and a motor 12 of the anilox roller 08 of the respective inking unit 06 interacting with the segmented wheel 03 are each assigned their own drive controller 83 and their own power unit 84. With the electronic control unit 82 described above, the relevant motor 11 of the plate cylinder 04 and the relevant motor 12 of the anilox roller 08 can also be controlled, e.g. B. regulated in its angular position and / or in its respective speed or at least adjustable. The respective drive controller 83 and the associated power unit 84 are preferably connected via the data bus 79 to the control unit 82 designed as a central machine control, with this central control unit 82 z. B. is formed as the decorator belonging to the control center in question.

In the preferred embodiment, several, preferably all, drives or motors 11; 12; 13; 77; 78; 87; 91; 94 each individually and independently controlled or at least controllable. It is preferably provided that for the respective motors 11; 12; 13; 77; 78; 87; 91; 94 for their respective control at least one family of characteristics z. B. in the central control unit 82 or z. B. in the respective motor 11; 12; 13; 77; 78; 87; 91; 94 associated drive controller 83 is stored. To e.g. B. a production change, in particular a conversion of the machine arrangement to produce hollow bodies 01 of a different format, e.g. B. on cans with a shorter or longer can height and / or a different can diameter compared to the current production, it is advantageous that the respective motors 11; 12; 13; 77; 78; 87; 91; 94 are each controlled or at least controllable in accordance with mutually matched sets of characteristic curves. As a result, the respective individually and independently controlled or at least controllable motors 11; 12; 13; 77; 78; 87; 91; 94 are synchronized with one another as a function of the respective production previously set or selected in particular on the central control unit 82, ie in particular on the control station. On the other hand, it is also possible with a drive concept using individual drives, e.g. B. for the purposes of maintenance or repair or installation or conversion, a first subset of each of one of the motors 11; 12; 13; 77; 78; 87; 91; 94 drivable assemblies 02; 03; 04; 08; 76; 86; 89; 92; 93, in particular a single one of one of the motors 11; 12; 13; 77; 78; 87; 91; 94 driven assembly 02; 03; 04; 08; 76; 86; 89; 92; 93 to be put into operation individually, ie selectively, so that they each execute or execute a rotational movement, while at least one other assembly 02; 03; 04; 08; 76; 86; 89; 92; 93, ie a second subset of each of one of the motors 11; 12; 13; 77; 78; 87; 91; 94 drivable assemblies 02; 03; 04; 08; 76; 86; 89; 92; 93 remained at a standstill.

In the embodiment according to the invention, the movement of the friction body 96 of the friction brake, which movement has the tangential velocity component, is mechanically coupled to the rotational movement of the transfer disk 92 . In the preferred embodiment, this means that the deceleration belt 96 is driven by the transfer disc 92 in that the drive roller 97 of the deceleration belt 96 is mechanically coupled to a shaft 42 of the transfer disc 92 that is driven in rotation by the drive 73 . This coupling is in the 2 indicated by a dashed line. The mechanical coupling of the movement of friction body 96 of the friction brake with the rotational movement of transfer disc 92 is advantageous because at this point in the transport path of hollow body 01, the tangential velocity component in the movement of friction body 96 of the friction brake is sufficient for trouble-free operation of the device for printing on the respective Lateral surface of hollow bodies 01 does not necessarily have to be maintained exactly and therefore a dynamic speed correction does not necessarily have to be carried out. At this point in the transport path of the hollow bodies 01, a more economical solution than providing a further individual drive for the friction body 96 of the friction brake can therefore be used without further ado.

An embodiment of the mechanical coupling of the movement of the friction body 96 of the friction brake with the rotational movement of the transfer disc 92 is in the 3 until 5 exemplified, where 3 shows a front side of this arrangement and 4 a rear view of this arrangement. 5 FIG. 12 shows an example of a plan view of this arrangement. In this arrangement, a belt wheel 43 is additionally arranged on the shaft 42 of the transfer disk 92 , this belt wheel 43 being arranged on the shaft 42 of the transfer disk 92 in an axially displaceable manner. The belt wheel 43 drives a traction means such. B. a self-contained drive belt 44, the drive roller 97 of the braking belt 96, wherein the drive belt 44 z. B. is deflected on a pinion 53, wherein the drive roller 97 of the braking belt 96 and the pinion 53 deflecting the drive belt 44 are arranged on the same shaft 52 in a rotationally fixed manner. The preferably self-contained braking band 96 is deflected via at least one deflection roller 46 . The drive belt 44 can be used as a non-positive traction drive z. B. in the form of a flat belt or a round belt or a V-belt or as a positive traction drive z. B. in the form of a toothed belt or a chain. With the belt wheel 43 and the drive belt 44, the rotational speed of the braking belt 96 is generally increased. Belt wheel 43 and drive belt 44, if applicable together with pinion 53 that deflects drive belt 44, are arranged in a first vertical plane E1, and drive roller 97, braking belt 96, and the at least one deflection roller 46 are arranged in a second vertical plane E2, with the first vertical plane E1 and the second vertical plane E2 are arranged parallel to each other. The drive belt 44 is z. B. tensioned by a preferably spring-loaded belt tensioner 47, whereas the braking band 96 by a z. B. with the deflection roller 46 cooperating tensioning device 48 is tensioned, the mechanical tension of the braking belt 96 at the z. B. on a lever 49 pivotally mounted clamping device 48 or in particular by a remote adjustment is preferably variably adjustable. The adjustment of the mechanical tension of the braking band 96 is done by a z. B. pneumatic actuator 51. The correct mechanical tension of the braking band 96 is z. B. monitored by sensors, whereby a possible breakage of the braking band 96 can be detected.

The belt wheel 43 is arranged to be axially displaceable on the shaft 42 in the same way as the transfer disk 92 . The axial displacement of the pulley 43 is z. B. via a threaded guide, the pulley 43 at its axial position to be adjusted z. B. is fixed by means of at least one clamping ring or can at least be fixed there. The transfer disk 92 must be adjusted in its axial position relative to the position of the mandrel wheel 02 for a trouble-free transfer of the hollow bodies 01 depending on their size, ie on their axial length 101, i. H. the axial position of the transfer disk 92 is different depending on the axial length 101 of the hollow body 01, ie the can height 101 of the cans to be transferred from the mandrel wheel 02 to the transfer disk 92, in particular two-part cans 01. In a preferred embodiment, when the transfer disk 92 is axially displaced, starting from the axial length 101 of the hollow body 01 during a first production, the belt wheel 43 is extended by an adjustment path Δx of the same amount to the axial length 101 of the hollow body 01 during a second production following the first production of the shaft 42 axially displaceable in the same direction. This facilitates z. B. a production change, in particular a conversion of the machine arrangement to a production, in particular a printing process of hollow bodies 01 of a different format, e.g. B. on cans with a shorter or longer can height 101 compared to the current production. Therefore, the amount and the direction of the adjustment path Δx of the axial displacement of the transfer disk 92 and belt wheel 43 depends on the axial length 101 of the hollow body 01. The axial displacement of belt wheel 43 and transfer disk 92 therefore takes place when there is a change in the axial length 101 of hollow body 01 compared to a previous printing process. In the 5 the second production, in which hollow bodies 01 with a greater axial length 101 compared to the previous first production, are transferred from the mandrel wheel 02 to the transfer disk 92, is shown in dashed lines.

Reference List

01

hollow body; two-piece can

02

mandrel wheel

03

segment wheel

04

printing form cylinder; plate cylinder

05

-

06

inking

07

inking roller

08

anilox roller

09

-

10

-

11

engine (04)

12

engine (08)

13

Drive; engine (03)

14

-

15

-

30

-

31

-

32

section (03)

33

blanket

34

axis of rotation (03)

35

-

36

recess

37

edge (33)

38

suspension leg (33)

39

Edge (36)

40

-

41

axis of rotation (02)

42

Wave

43

pulley

44

drive belt

45

-

46

pulley

47

belt tensioner

48

clamping device

49

lever

50

-

51

adjusting device

52

Wave

53

pinion

54

-

55

-

70

-

71

-

72

-

73

drive (92)

74

conveyor

75

-

76

conveyor wheel

77

drive (02)

78

Drive (76; 92)

79

data bus

80

-

81

transfer position

82

control unit

83

drive controller

84

power section

85

-

86

acceleration band

87

drive (86)

88

painting facility

89

lacquer applicator roller

90

-

91

drive (89)

92

transfer disc

93

conveyor; transport chain

94

drive (93)

95

-

96

friction bodies; slowdown band

97

drive roller

98

air blast device

E1

first vertical plane

E2

second vertical plane

101

length(01); can height

φ1

angular position, first

φ2

angular position, second

Δx

travel

Claims (11)

Device for printing the respective lateral surface of hollow bodies (01), with a mandrel wheel (02) having several holding devices, wherein a hollow body (01) can be arranged on each of these holding devices, with a mechanical friction brake being arranged in the periphery of the mandrel wheel (02). , wherein a friction body (96) of the friction brake is arranged to brake at least one rotating hollow body (01) held on one of the holding devices of the mandrel wheel (02) by friction, the friction body (96) of the friction brake being positioned relative to the one on one of the holding devices of the mandrel wheel (02 ) held hollow body (01) is moved, wherein the movement of the friction body (96) of the friction brake has a tangential speed component to the lateral surface of the hollow body (01), with a rotating or at least rotatable component in the transport direction of the hollow body (01) after the mandrel wheel (02). Transfer disc (92) held on the mandrel wheel (02) for transfer en hollow bodies (01), characterized in that the movement of the friction body (96) of the friction brake having the tangential speed component is mechanically coupled to the rotational movement of the transfer disc (92). device after claim 1 , characterized in that the holding devices of the mandrel wheel (02) are each designed in the form of a mandrel or a spindle protruding from an end face of the mandrel wheel (02), with a longitudinal axis of each mandrel or each spindle being directed parallel to the axis of the mandrel wheel (02). one of the hollow bodies (01) is held or at least can be held by each of the holding devices, each mandrel or each spindle being arranged or at least rotatable in each case so as to rotate about its respective longitudinal axis. device after claim 2 , characterized in that each of the mandrels or spindles is set by the friction body (96) of the friction brake to a specific circumferential speed by means of friction or can at least be adjusted in such a way that each hollow body (01) held by one of the mandrels or by one of the spindles, in addition to the rotation of the Mandrel wheel (02) is arranged to rotate or at least can be rotated by a rotation that is carried out or at least can be carried out independently by the mandrel in question or the spindle in question. device after claim 1 or 2 or 3 , characterized in that the friction body (96) of the friction brake is arranged in the transport direction of the hollow body (01) after a paint applicator roller (89) of a painting device (88). device after claim 1 or 2 or 3 or 4 , characterized in that the friction body (96) of the friction brake is designed as a revolving braking belt (96) driven by a drive roller (97) and acting on at least one of the holding devices of the mandrel wheel (02), the braking belt (96) being separated from the transfer disc ( 92) is driven in that the drive roller (97) of the braking belt (96) is mechanically coupled to a shaft (42) of the transfer disc (92). device after claim 5 , characterized in that a belt wheel (43) is also arranged on the shaft (42) of the transfer disc (92), this belt wheel (43) driving the drive roller (97) of the braking belt (96) by means of a closed drive belt (44). is arranged. device after claim 6 , characterized in that the transfer disk (92) and the belt wheel (43) are each arranged to be axially displaceable on the shaft (42) of the transfer disk (92), the transfer disk (92) and the belt wheel (43) being mounted on this shaft (42 ) in each case by a travel of the same amount (Δx). the shaft (42) are axially displaceable in the same direction, the amount and the direction of the adjustment path (Δx) of the axial displacement of the transfer disk (92) and belt wheel (43) being of a changed axial length (101) compared to a previous printing process the hollow body (01) are dependent. device after claim 6 or 7 , characterized in that the belt wheel (43) and the drive belt (44) are arranged in a first vertical plane (E1) and that the drive roller (97), the slow-down belt (96) and at least one deflection roller (96) deflecting the slow-down belt (96) 46) are arranged in a second vertical plane (E2), the first vertical plane (E1) and the second vertical plane (E2) being arranged parallel to one another. device after claim 6 or 7 or 8th , characterized in that the drive belt (44) is tensioned by a spring-loaded belt tensioner (47) and/or that the deceleration belt (96) is tensioned by a tensioning device (48), the tension of the deceleration belt (96) being adjusted on the tensioning device (48 ) is set or variably adjustable by a remote control. device after claim 9 , characterized in that an adjustment of the tension of the braking band (96) is monitored by sensors and/or that a possible breakage of this braking band (96) is monitored. device after claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8th or 9 or 10 , characterized in that the shaft (42) of the transfer disk (92) is driven by its own drive (73) which is independent of the drive (77) of the mandrel wheel (02).

Images