DE102014213805B3 - Inking unit of a printing unit - Google Patents

Abstract

An inking unit of a printing unit and a device for printing hollow bodies each having a cylindrical outer surface are proposed with this inking unit, the inking unit having an inking roller that receives ink from a ink reservoir and an inking roller that can be set on a plate cylinder of the printing unit, with an outer diameter of the inking roller and an outer diameter of the plate cylinder are equal in terms of amount, the plate cylinder and the anilox roller are each rotatably driven by a motor, the inking roller being rotatably driven by the anilox roller by friction, a rotary encoder detecting a speed of rotation of the inking roller being provided, a control unit being provided , wherein this control unit uses the signal generated by the encoder to set or adjust the speed of the inking roller by means of the rotation of the anilox roller in such a way that a synchronism between the plat cylinder and the inking roller is set.

Description

The invention relates to an inking unit of a printing unit according to claim 1.

Such as B. from the WO 2012/148576 A1 is known to be used in the packaging industry in a device for decoration of each having a cylindrical surface having hollow bodies mostly multiple printing units. Each of these printing units each transfers a printing ink to a blanket commonly used by these printing units. The lateral surface of the respective hollow body is then by a relative movement between the lateral surface of the respective hollow body and the previously colored in particular multicolored blanket, in particular by rolling the lateral surface of the respective hollow body on this blanket, with a z. B. decorated multicolored print motif.

Such a device for printing or decoration of each having a preferably cylindrical outer surface having hollow bodies is z. B. in conjunction with an i. d. R. multiple workstations having used plant for the production of such hollow body, wherein the printing or the decoration of the hollow body is carried out by a printing process, which is why these hollow bodies can be generally referred to as printed products. In such a system to be printed hollow body in a mass production with z. B. several hundred or even a few thousand pieces per minute, z. B. manufactured between 1,500 and 3,000 pieces per minute. Such hollow body z. B. made of metal, especially steel or aluminum, or made of a plastic. Such hollow body made of metal z. B. used as beverage cans or aerosol cans. Such hollow plastic body z. B. prepared in the form of thermoplastic moldings and z. B. as a cup for packaging z. As used by liquid or pasty foods, especially dairy products or drinks. However, the respective hollow body may also be a round tube body produced either from a plastic or from aluminum, wherein a tube is understood to mean an elongated, firm, but malleable container which is provided for filling with a substance, in particular pasty substance. Tubes made of aluminum are z. B. produced in a Rückwärtsfließpressverfahren. Plastic tubes are z. B. produced by extrusion in each case as seamless tubes. Another type of hollow bodies to be printed in an aforementioned device may be preferably cylindrical containers or vessels made of glass, e.g. As bottles or bottles.

Beverage cans are preferably made of aluminum and are i. d. R. so-called Zweiteildosen, in which a circular bottom together with a preferably straight cylinder jacket each from a single workpiece, d. H. from a so-called Slugs or from a Ronde, d. H. a circular disc, in a forming process, for. Example, in a cold extrusion or in a Zugdruckumformverfahren, preferably by deep drawing, in particular by ironing, to a one-sided open hollow body, d. H. be made to a so-called Rohdose and wherein in a final manufacturing step, a circular cover is placed on the cylinder jacket and airtight connected by beading with the cylinder jacket.

Another type of can tinplate cans. Tinplate is a tinned sheet steel. For the production of tinplate cans, the thickness of the steel sheet z. 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. To make the jacket of a tinplate can, a rectangular strip of steel sheet is bent to a preferably straight cylinder jacket, wherein the ends of this bent into a cylinder jacket strip are welded in a butt joint. Subsequently, a circular bottom and a circular cover are placed on the cylinder jacket and the edges are crimped. In order to obtain a higher resistance to indentations for the tinplate box in question, have z. B. All three parts, d. H. the cylinder jacket, the bottom and the lid preferably a wave profile.

An aerosol can, also referred to as a spray can or spray can, is a metal can for spraying liquids. In an aerosol can, the filled liquid is under pressure, wherein as a propellant for discharging the liquid in question from the respective can z. As 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, wherein an arrangement of a plurality of printing units, each with an inking unit for multicolor decoration of a plurality of cans is provided, each of the inking units belonging to one of the printing units each having a color box for providing printing ink, wherein in each color box each ink fountain roller for receiving the ink from the respective ink fountain is provided, wherein in each inking unit each a Farbduktor are provided, wherein the Farbduktor each ink of the respective Ink fountain roller receives, wherein in a respective inking roller in the respective ink fountain roller a plurality of iridescent Farbreiberwalzen and several cooperating with at least one of Farbreiberwalzen ink transfer rollers are provided, wherein for each inking unit a plate cylinder with at least one pressure plate is present, with the respective plate cylinder for applying the ink only a single inking roller cooperates.

By the WO 2004/109581 A2 is an apparatus for carrying out a contactless digital printing method, for. B. an inkjet printing method to round objects, especially second-rate, without the use of a blanket, if necessary, to print individually, preferably a plurality of printheads are provided, each printing a single ink.

By the DE 10 2006 048 286 A1 a method for driving a printing unit with a short inking unit in a processing machine with an anilox roller and an associated doctor device and a subordinate roller of the anilox roller inking roller is downstream of a plate / forme cylinder in the color flow direction, wherein the plate / forme cylinder with a blanket cylinder and the Blanket cylinder is in operative connection with a printing cylinder leading the printing substrate, wherein the anilox roller is driven by a single drive, wherein in printing / Lackierbetrieb from the main drive a drive on 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, wherein the single drive of the anilox roller is inactive, and wherein in the setup operation, the drive connection to the main drive between the first drive wheel and second Ant riebsrad the plate / forme cylinder is separated, the single drive of the anilox roller is activated and by means of a single drive a drive torque to the drive wheel of the anilox roller and the drive wheel of the inking roller and the first drive wheel of the plate / forme cylinder is introduced.

The invention has for its object to provide an inking unit of a printing unit, which largely avoids stenciling and yet is inexpensive.

The object is achieved 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 illustrated in the drawings and will be described in more detail below. With the invention achievable advantages are mentioned in connection with the embodiment.

Show it:

1 a device for printing or for decoration of each having a lateral surface having hollow bodies;

2 an inking in particular for the in 1 illustrated device in a first operating position;

3 the inking especially for the in 1 illustrated device in a second operating position;

4 a chambered doctor blade system especially for in the 2 and 3 illustrated inking;

5 a disc changer in a first operating position;

6 the disc changer the 5 in a second operating position.

The printing of the lateral surface of a hollow body with a z. B. multicolor print motif, ie at least one printed image is carried out in a preferred embodiment in a high-pressure process. Alternative printing methods are z. B. a screen printing or an offset printing process or a pressure-formless digital printing process. In the following the invention will be described by way of example in connection with a high pressure process. For carrying out the high-pressure method, a printing plate is arranged on a lateral surface of a plate cylinder. The printing plate ready for use in the printing process is a printing form with a printing relief, this printing relief reflects the image intended for the printing process mirrored, wherein in a trouble-free printing operation only the printing relief on the transfer of the plate cylinder supplied by the inking ink is involved in the blanket. The printing plate has a plate-shaped preferably flexible carrier finite length z. B. from a steel sheet, wherein a particularly flexible pressure body is arranged on this support. At least the opposite in the circumferential direction of the plate cylinder ends of the carrier can, for. B. be bent in accordance with the curvature of the lateral surface of the plate cylinder or be angled to allow for easier installation of the printing plate on the plate cylinder. The support of the printing plate has a thickness in the range of z. B. 0.2 mm to 0.3 mm. The printing plate, including its carrier has a total thickness in the range of z. B. 0.7 mm to 1.0 mm, preferably about 0.8 mm. The pressure hull is z. B. formed from a plastic. The pressure hull is used to produce the printing cliché that can be used for the printing process. B. exposed to a print image reproducing negative film, wherein unexposed areas then from the pressure body z. B. be removed by washing or by means of a laser.

A device for printing or for decoration of each having a preferably cylindrical outer surface having hollow bodies has a plurality, for. B. eight or ten or even more printing units - also called printing stations - on, at least one of these printing units, in the preferred embodiment, all of these printing units each have a rotatable printing plate cylinder, in particular designed as a plate cylinder printing form cylinder, the printing units or printing stations and possibly also the printing form cylinder in this device are each mounted in a frame and can be used in the same printing process to form on the same hollow body according to the number of participating printing units or printing forme cylinder multicolored print motif. The storage of the printing form cylinder or plate cylinder is preferably each formed as a flying bearing, wherein the respective plate cylinder or plate cylinder at one of its end faces in each case z. B. is mounted on a preferably conical pin. On the lateral surface of each plate cylinder is i. d. R. each arranged only a single printing plate, wherein the support of the printing plate the circumference of the respective plate cylinder completely or at least for the most part, in particular spans more than 80%. A directed in the circumferential direction of the relevant plate cylinder length of the pressure body of the printing plate is preferably formed shorter than the circumference of the relevant plate cylinder. The printing plate is held by means of its carrier in particular magnetically on the lateral surface of each plate cylinder. In an alternative or additional embodiment variant of the device for printing or for decoration of a preferably cylindrical shell surface having hollow bodies at least one of the printing units or there are also several of these printing units each as a pressure in a digital printing process printing unit formed, wherein such a printing unit in particular has at least one inkjet print head or a laser.

The particular simultaneous transfer of a plurality of printing inks on the lateral surface of the hollow body in question requires that this color transfer takes place in register in order to achieve good print quality in the printing process. For a register-containing arrangement of the printing plate or the printing plate on the lateral surface of the respective printing plate cylinder or plate cylinder are preferably on the lateral surface of the respective printing form cylinder or plate cylinder, for. B. in their respective position each adjustable dowel pins provided, which engage in corresponding formed on the printing plate or on the printing plate recesses and the printing plate or the printing plate thereby at her or his arrangement on the lateral surface of the relevant plate cylinder or plate cylinder there a give defined position. In a preferred embodiment, each plate cylinder or plate cylinder each has a diameter in the range between 100 mm and 150 mm, in particular between 120 mm and 130 mm, wherein an axial length of the respective plate cylinder or plate cylinder in each case z. B. between 200 mm and 250 mm, in particular between 200 mm and 220 mm. The printing plate to be arranged on the lateral surface of the relevant plate cylinder has a width directed in the axial direction of the relevant plate cylinder in the range of 150 mm to 200 mm, preferably approximately 175 mm.

Each of the used in the printing process z. B. formed as a plate cylinder printing plate cylinder transmits with its printing plate or with his printing plate each have a specific ink on a blanket. The printing inks used are usually premixed, especially custom special colors that are tuned with regard to their respective printability in a special way to the material of the hollow body to be printed, depending on whether a surface z. B. of aluminum, a tinplate or a plastic is printed. In a preferred embodiment of a device for printing or for decoration of each z. B. a cylindrical surface having hollow bodies, a printing ink from the printing plate or the printing plate is provided on the lateral surface of the respective hollow body transmitting device. This ink-transferring device is preferably designed as a segment wheel rotating about a horizontal axis, wherein a plurality of printing blankets are preferably arranged on the periphery of this segment wheel, ie, along its circumference one behind the other. The ink-transferring device may be formed as an alternative to the segment wheel depending on the printing method used but also as a decorative drum or as a blanket cylinder or as a transfer cylinder. The arrangement of the blankets on the circumference of the segment wheel z. B. in that the blankets on the circumference of the segment wheel each by a cohesive connection, z. B. are attached by gluing. The preferably a plurality of printing plate cylinders or plate cylinders are each set radially to the printing blankets arranged on the circumference of the respective segment wheel or at least can be set. In a particularly preferred embodiment of a device for printing or for decoration of a respective z. B. cylindrical surface having hollow bodies is arranged along the circumference of the segment wheel in a row a larger number of blankets, as are each provided to the segment radially radially employed or at least adjustable pressure plate cylinder or plate cylinder. The preferably carousel-like printing ink-transferring device, in particular the segment wheel has a diameter of z. B. 1,500 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 at its periphery in a row z. B. twelve blankets. The surface of each printing plate is preferably formed with a greater hardness than the hardness of the respective surface of the blankets. The surface of the blankets is preferably flat. In an operating state, in which the printing plate cylinders or plate cylinders involved in the printing process are respectively radially engaged with the blankets of the rotationally driven segment wheel, the respective printing forms of these plate cylinders or the respective printing plates of these plate cylinders roll onto the blankets moved by the segment wheel, wherein the printing plates at least their printing relief each z. B. 0.2 mm to 0.25 mm deep into the respective blanket and thereby produce in the respective Drucktuck extending in the axial direction of the segment wheel flattening, ie a roller strip. An intensity of flattening is z. B. before or at the beginning of a printing process z. B. set by means of a remote control by adjusting a force exerted by the relevant printing form cylinder or plate cylinder on the relevant blanket of the segment wheel contact pressure.

The printed hollow body, z. B. to be printed Zweiteildosen be z. Example by means of a hollow body to be printed preferably along at least a portion of a circular path, d. H. a circular arc about a rotation axis transporting transport device, preferably by means of a Zuführrades, in particular by means of a Mandrelrades continuously or in a set clock to at least one of the device for printing each of a lateral surface of hollow bodies belonging printing units introduced and thus in a printing range of at least one of these printing units transported. For example, the hollow body to be printed by means of z. B. designed as feed wheel transport device to each at least one of z. B. arranged on the segment wheel arranged blankets, or to be printed hollow body by means of this transport device each directly and directly, d. H. without the help of a z. B. as a segment wheel formed ink transferring device transported in the respective printing area of at least one of these printing units, which is the case when the printing unit in question in a direct printing method, z. B. prints in an inkjet printing process.

The like. B. the segment also about a preferably horizontal axis rotating feed wheel or mandrel has concentric with its circumferential line in preferably equidistant distribution more, z. B. 24 or 36 holder z. B. each in the form of a cantilevered from an end face of the Mandrel wheel mandrel or a spindle, wherein each holder of each one of the hollow body to be printed is held or at least can be held. A trained as Mandrelrad transport device is sometimes referred to as a turntable with spindles. A Mandrelrad is z. B. in the EP 1 165 318 A1 described. A description of suitable holders, spindles or mandrels is found for. B. in the WO 2011/156052 A1 , In the following, each mandrel is referred to briefly as a mandrel. 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 Zweiteildose to be printed hollow bodies, each of these hollow body z. B. by means of a conveyor, for. B. a belt conveyor to the z. B. introduced as Mandrelrad transport device and there at a transfer station z. B. sucked by suction on one of the mandrels of Mandandrades and then held by the mandrel concerned, while designed as Mandrelrad transport device to the respective hollow body to be printed z. B. to the occupied with at least one blanket segment wheel and thus transported towards at least one of the printing units or in an alternative embodiment z. B. transported without segment wheel directly to at least one of the printing units. I. d. R. be supplied to the mandrel with the conveyor in rapid succession sequentially a larger amount to be printed hollow bodies. Such a conveyor is z. B. in the EP 1 132 207 A1 described.

Between an inner wall of the respective hollow body to be printed and the surface of the respective mandrel of the Mandrelrades is preferably a gap with a width of z. B. 0.2 mm, so that the hollow body to be printed is not held by a pressure on the respective mandrel. Each thorn is z. B. rotatable by means of a motor about its respective longitudinal axis and adjustable in particular to a certain peripheral speed, so that each held by a mandrel to be printed hollow body in addition to the rotation of the Mandrel wheel by an independently executed by the mandrel or at least executable rotation is rotatable. The putting on of the to be printed hollow body on one of the mandrels of the Mandrelrades preferably takes place during a standstill phase of the respective mandrel, wherein the mandrel in question during its stoppage phase does not perform any rotational movement about its own longitudinal axis. The occupation of each mandrel with a hollow body to be printed is preferably checked, for. B. contactless with a sensor. In a missing assignment of a mandrel with a hollow body to be printed Mandrelrad z. B. such that a contact of the respective free mandrel is reliably avoided with a blanket of the segment wheel.

To be printed Zweiteildosen be before their delivery z. B. to mandrel in a mandrel wheel upstream processing station from a Ronde z. B. deep-drawn. In another processing station, each edge of its box is trimmed at its open end. Each Zweiteildose is z in other processing stations. B. washed, her interior in particular washed out, optionally also painted. At least the outer surface of each Zweiteildose z. B. primed, especially with a white primer. After printing on its lateral surface Zweiteildose of their respective holder z. B. on mandrel z. B. removed by compressed air or by a preferably switchable magnet and fed to at least one mandrel downstream of the processing station, z. B. a painting for painting the outer surface of each printed second can and / or a border processing station. The printed Zweiteildosen go through in particular a dryer, z. B. a hot air dryer to cure the at least one applied to their respective lateral surface ink.

The printing process for printing the respective lateral surface of z. B. held on the Mandrelrad hollow bodies, in particular Zweiteildosen, begins with the fact that all of the printing on the respective outer surface of the hollow body to be printed image required in each case z. B. from the respective printing plate of z. B. applied to the segment wheel plate cylinder are applied to the same of one of the circumference of the segment wheel blankets. The inked in question with all required inks inked blanket then transfers in a touch contact between the blanket and the lateral surface of the hollow body to be printed these inks simultaneously during a single revolution of held on one of the mandrels Mandandrades to be printed hollow body about its longitudinal axis on the lateral surface of this hollow body. During the transfer of the printing inks from the blanket to the lateral surface of the hollow body of the z. B. held by one of the mandrels Mandandrades to be printed hollow body with an absolute same circumferential speed as the concerned z. B. arranged on the circumference of the segment wheel blanket. The respective peripheral speeds of the hollow body and blanket or segment wheel are therefore synchronized with each other, wherein the z. B. held on one of the dome of the Mandrel wheel to be printed hollow body z. B. starting from its first contact point with the relevant blanket during the rolling of its lateral surface over a distance from the first z. B. 50 mm from the peripheral length of the blanket from its stoppage in particular until reaching the peripheral speed z. B. the segment wheel is accelerated accordingly. The segmental wheel carrying the relevant printing blanket accordingly gives the z. B. at the respective mandrel of the Mandrel wheel to be set peripheral speed. Also, the peripheral speed of the printing plate-carrying printing plate cylinder or the printing plate bearing plate cylinder is or is preferably in dependence on the peripheral speed z. B. the segment wheel set. The Mandrel and the Segmentrad are z. B. driven by a same central machine drive and optionally mechanically z. B. coupled together via a gearbox. Alternatively, the Mandrel and the Segmentrad are each driven individually by a separate drive and z. B. controlled by a control unit in their respective rotational behavior.

In particular, with reference to the previously described apparatus for printing or for decoration of a respective z. B. cylindrical surface having hollow bodies will be explained below with reference to the above six figures. 1 shows in a schematic representation simplified and exemplified a generic device for printing or for decoration of a particular cylindrical lateral surface having hollow bodies 01 , z. B. Secondary doses 01 , wherein these hollow bodies 01 with a conveyor z. B. sequentially the z. B. as a rotating or at least rotatable Zuführrad, especially as Mandrel 02 fed trained transport device and there are held individually on each transport device to a holder. In the following, it is assumed that this transport device is preferably a mandrel wheel 02 is trained. With the Mandrel wheel 02 Preferably, an ink transferring device, e.g. B. a rotating or at least rotatable Segmentrad 03 together, along whose or its circumference several printing blankets are arranged one behind the other. In association with the example mentioned Segmentrad 03 are along its circumferential line a plurality of radial to this segment wheel 03 Employed or at least adjustable pressure cylinder, in particular plate cylinder 04 provided, wherein on the respective lateral surface of this plate cylinder or plate cylinder 04 in each case a printing form, in particular a printing plate is arranged, this printing plate is particularly suitable for carrying out a high-pressure method. Each of the printing plate cylinder or plate cylinder 04 is used to color his printing form or his printing plate by means of an inking unit 06 each fed a specific ink. In the following, it is assumed, by way of example, that the printing form cylinders each act as a plate cylinder carrying at least one printing plate 04 are formed.

2 and 3 show in a simplified schematic representation some details of each with a plate cylinder 04 co-operating inking unit 06 which is especially suitable for use in the in 1 illustrated device for printing or for decoration of a particular cylindrical lateral surface having hollow bodies 01 is provided. The here proposed inking 06 indicates for the color transport from a color reservoir to the respective plate cylinder 04 advantageously a very short, in particular two-roll compactor, consisting only of a single inking roller 07 and an anilox roller 08 , Such an inking unit 06 belongs to the genus Kurzfarbenwerke. 2 shows a first operating position, in which the inking roller 07 and the anilox roller 08 hired together, the inking roller 07 to the plate cylinder 04 employed and also the plate cylinder 04 radially to the ink from the plate cylinder 04 to the lateral surface of the respective hollow body 01 transferring device, in particular to the segment wheel 03 are employed. 3 shows, however, a second operating position, in which the inking roller 07 and the anilox roller 08 off of each other, the inking roller 07 from the plate cylinder 04 turned off and also the plate cylinder 04 from the ink-transferring device, in particular from the segment wheel 03 are turned off. On the arrival and Abstellmechanismus will be discussed later.

The plate cylinder 04 and the anilox roller 08 are preferably used in the 2 and 3 illustrated inking unit 06 each independently of a z. B. adjustable in its respective speed motor 11 ; 12 driven by rotation. The z. B. as a segment wheel 03 trained ink transferring device is z. B. driven by a separate drive or by a central machine drive rotatively. The inking roller 07 is or is from the anilox roller 08 driven by friction by friction. In the preferred embodiment, an outer diameter d07 of the inking roller 07 and an outer diameter d04 of the at least one printing plate, in particular at least one printing plate bearing plate cylinder 04 in terms of amount. On the lateral surface of the plate cylinder 04 At least one printing plate can be arranged, so that with the same outside diameters d04; d07 the plate cylinder carrying the printing plate 04 and the inking roller 07 each having an identical circumferential length. In the preferred embodiment are in the first operating position of the plate cylinder 04 co-operating inking unit 06 in which the inking roller 07 and the anilox roller 08 hired together, the inking roller 07 to the plate cylinder 04 employed and also the plate cylinder 04 to the segment wheel 03 are employed, at least the respective centers of the plate cylinder 04 , the inking roller 07 and the anilox roller 08 arranged along a same straight line G. For detecting the rotation of the inking roller 07 is z. B. a rotary encoder provided. That of the rotary roller of the inking roller 07 Generated signal is used by a control unit to increase the speed of the inking roller 07 by means of the rotation of the anilox roller 08 set such or nachzuführen in case of need such that a synchronization between the plate cylinder 04 and the inking roller 07 is set so that the peripheral speed of the inking roller 07 with the peripheral speed of the plate cylinder 04 within previously specified permissible tolerance limits. In order to achieve this goal, it may be provided that the control unit preferably during the setting phase carried out by it, the peripheral speed of the anilox roller 08 set such that these compared to the peripheral speed of the plate cylinder 04 especially briefly - and thus not permanently - has a lead or lag. Due to the design of plate cylinder 04 and inking roller 07 each with the same circumference in terms of magnitude and by adjusting the synchronization between the plate cylinder 04 and the inking roller 07 the printing quality detrimental effect of stenciling is largely avoided. The drive concept described here with a friction-driven inking roller 07 also has the advantage that for the inking roller 07 a separate drive is not required, which saves costs and because of the simpler mechanical design z. B. for maintenance or repair work, an exchange of the inking roller 07 facilitated.

The inking roller 07 has in its preferred embodiment a closed, preferably rubberized lateral surface. The anilox roller 08 has a z. B. coated with a ceramic surface, wherein in the ceramic layer a Haschur of z. B. 80 lines per centimeter axial length of the anilox roller 08 or a cup structure is formed. The outer diameter d08 of the anilox roller 08 is preferably formed larger as the outer diameter d07 of the inking roller 07 , In the 2 is the respective direction of rotation of the segment wheel 03 , the plate cylinder 04 , the inking roller 07 and the anilox roller 08 each indicated by a direction of rotation arrow.

In the preferred embodiment, at least the anilox roller 08 a tempering, with the aid of the lateral surface of the anilox roller 08 is tempered. The tempering of the anilox roller 08 works z. B. with a in the interior of the anilox roller 08 initiated tempering, wherein the tempering z. B. is water or another liquid coolant. With the tempering device of the anilox roller 08 becomes a delivery volume of the anilox roller 08 and / or the viscosity of the inking unit 06 influenced to transported ink. The delivery volume of the anilox roller 08 and the viscosity of the inking unit 06 Ink to be transported in turn ultimately affect a color density of the on the cylindrical surface of the hollow body to be printed 01 to be applied printing ink. A thickness of a on the cylindrical surface of the hollow body to be printed 01 to be applied, formed by the ink color film is z. B. at about 3 microns.

The ink reservoir of the inking unit 06 is z. B. as a in connection with the anilox roller 08 acting chamber doctor blade system 09 educated. Advantageously form in this chamber doctor blade system 09 at least one ink tray, an axis-parallel to the anilox roller 08 employee or at least adjustable squeegee and a pump for conveying the ink, a single unit, said chamber doctor blade system 09 in the inking unit 06 ie on a frame of the inking unit 06 preferably only on one side z. B. is held or stored by a suspension, so that this unit in a simple manner after its release from the frame of the inking unit 06 laterally, ie by an axis-parallel to the anilox roller 08 directed movement, z. B. by pulling on a arranged on this unit handle from the inking unit 06 removable and thus exchangeable. This unit of the chamber doctor blade system 09 preferably forms a cantilever on a side frame of the inking unit 06 , 4 shows in a perspective view formed as a single unit chamber chamber system 09 in cooperation with the anilox roller 08 of the inking unit 06 ,

After the anilox roller 08 Printing ink from the ink reservoir, ie in particular from the chamber doctor blade system 09 has picked up, transported the anilox roller 08 this ink to the inking roller 07 , In a direction of rotation of the anilox roller 08 to the anilox roller 08 employed chamber doctor blade system 09 subsequent area between the chambered doctor blade system 09 and the inking roller 07 is preferably a rider roll 13 to the anilox roller 08 employed or at least adjustable to the color transport of the anilox roller 08 to improve. The rider roll 13 is axially parallel to the anilox roller 08 arranged. The rider roll 13 is not considered to be the roller of the inking unit 06 considered as they no ink from the anilox roller 08 transfers to another roller. The from the anilox roller 08 z. B. by friction rotatably driven rider roll 13 has z. B. a rubberized jacket surface. The to the anilox roller 08 Employed rider roller 13 sucks during its rolling on the lateral surface of the anilox roller 08 a part of the anilox roller 08 from the chamber doctor blade system 09 recorded ink from the Haschur or the wells of the anilox roller 08 and applies this ink at least partially on the lateral surface of the anilox roller 08 trained webs off. This causes the on the anilox roller 08 rolling rider roll 13 that the anilox roller 08 a larger amount of ink to the inking roller 07 emits. In a further consequence, an anilox roller having a tempering device 08 also improves the effectiveness of controlling the color density, that on the anilox roller 08 rolling rider roll 13 contributes to providing a larger amount of ink. The on the anilox roller 08 rolling rider roll 13 thus reduces both density differences caused by manufacturing tolerances of the anilox roller 08 can arise, as well as the risk of visibility of Haschur or wells of the anilox roller 08 on the substrate, ie here on the lateral surface of the hollow body to be printed 01 as a result of at least in places too little paint application.

In preferably fixed allocation z. B. to each plate cylinder, in particular plate cylinder 04 is each a disc changer 14 provided, with which the particular form of the forme cylinder in question printing form or for the relevant plate cylinder 04 certain printing plates within the device for printing or for decoration of a particular cylindrical lateral surface having hollow bodies 01 preferably automatically replaceable. The 5 and 6 show in a perspective view a preferred embodiment of such a disk changer 14 in two different operating positions. 5 shows a first operating position, in the side next to the printing unit on the plate cylinder or plate changer 14 z. B. submitted a printing plate or from the disk changer 14 can be removed. 6 shows a second operating position, in the immediately before the plate cylinder or plate cylinder 04 along to this from the disk changer 14 from z. B. a printing plate directly to the associated plate cylinder 04 placed on top or a printing plate from the plate cylinder 04 taken off and with the plate changer 14 in its first Operating position can be dissipated. The record changer 14 has a particular plane, z. B. table-shaped support surface 16 on, on which z. B. on the plate cylinder 04 arranged or to be arranged printing plate can preferably be placed completely. The bearing surface 16 is preferably linear in particular along the axis of rotation of the associated printing plate cylinder or plate cylinder 04 between at least two defined positions arranged to move back and forth. In a laterally located next to the printing unit first position of the support surface 16 takes the disk changer 14 his first operating position, in an immediately before the plate cylinder or plate cylinder 04 along this second position of the support surface 16 his second operating position. In the first operating position is the support surface 16 the disc changer 14 at least partially in front of an end face of the relevant printing plate cylinder or plate cylinder 04 , In the second operating position is the bearing surface 16 the disc changer 14 at least partially below the lateral surface of the plate cylinder or plate cylinder 04 , The movement of the support surface 16 the disc changer 14 takes place for. B. along a longitudinal to the plate cylinder or plate cylinder 04 arranged traverse 17 , The bearing surface 16 the disc changer 14 thus has a relation to the respective printing plate cylinder or plate cylinder 04 axial travel. To the first or the second operating position of the disc changer 14 defining positions is the movement of the support surface 16 z. B. each bounded by a stop. At least the carrier of the respective printing plate is z. B. formed by a particular running using registration marks trimming such that the relevant printing plate on the support surface 16 the disc changer 14 can be arranged in register. For this purpose, at least two at a right angle to each other arranged edges of the carrier of the respective printing plate in a contact with contact to the support surface 16 the disc changer 14 arranged registration pins brought, wherein a first edge of the carrier of the respective printing plate to a first register pin and a first edge orthogonal second edge of the carrier of the respective printing plate abuts against a second register pin, wherein one of these two register pins is changeable in position and adjustable. By adjusting the variable in its position register pin z. B. the relevant printing plate in register aligned. The setting of the variable in its position register pin can be done manually or automatically. Since the printing plate the relevant plate cylinder 04 is supplied in register, is on the plate cylinder 04 z. B. no centering pin and no other register device provided.

The record changer 14 indicates except the bearing surface 16 for receiving a z. B. the plate cylinder 04 in particular to be supplied in register printing clichés z. As a subject, in which z. B. one from the plate cylinder 04 Removed pressure cliché can be stored. A by means of its carrier in particular magnetically on the lateral surface of the relevant plate cylinder 04 held printing plate is z. Example by means of a between the support of the printing plate and the outer surface of the plate cylinder concerned 04 guided spatula from the lateral surface of the relevant plate cylinder 04 lifted. That of the lateral surface of the relevant plate cylinder 04 lifted one end of the respective printing plate is by a rotation of the relevant plate cylinder 04 in the relevant compartment of the plate cylinder 04 introduced. By continuing this rotation of the relevant plate cylinder 04 then the whole of the lateral surface of the plate cylinder concerned 04 dissolved printing plate in the relevant compartment of the plate cylinder 04 inserted.

A plate cylinder in question 04 Registered to be supplied pressure cliché is in particular after its registered registration by a magnetic holding force on the support surface 16 the disc changer 14 held. It is at least one stamp, preferably two in the longitudinal direction of the relevant plate cylinder 04 spaced arranged stamp each with a support surface 16 the disc changer 14 substantially orthogonal, the magnetic holding force directed opposite direction of action provided with which at least one punch at least one of the plate cylinder in question 04 facing end of the bearing surface 16 the disc changer 14 held printing plates of this bearing surface 16 solved and due to a lifting movement of the at least one punch to the relevant plate cylinder 04 can be handed over. The at least one stamp is z. B. pneumatically actuated or at least so actuated. For holding the printing plate on the support surface 16 the disc changer 14 or on the lateral surface of the plate cylinder 04 magnets are used, these magnets are preferably each formed as a permanent magnet. The above-described embodiment of the plate cylinder 04 has the advantage that a conveyor for the transfer of the printing plate to the relevant plate cylinder 04 or for removing the printing plate from the respective plate cylinder 04 is not required and the disc changer 14 Therefore, it can be realized very inexpensively.

The respective employment and / or shutdown of printing forme cylinder or plate cylinder 04 , Inking roller 07 and / or anilox roller 08 and / or a hiring one of them each exerted contact pressure is done with an example in the 2 and 3 illustrated arrival and Abstellmechanismus, which will now be described in more detail. In the preferred embodiment, the printing plate cylinder or plate cylinder 04 in particular at both ends on a load arm of a preferably one-sided first lever arrangement consisting of a force arm and the load arm 18 stored, wherein the power arm and the angle fixed to the power arm arranged load arm of this first lever arrangement 18 together around an axis parallel to the plate cylinder 04 directed first axis of rotation 19 are pivotable. In an operative connection to the power arm of the first lever arrangement 18 is for applying a torque about the first axis of rotation 19 a preferably controlled by a control unit first drive 21 z. B. arranged in the form of a hydraulic or pneumatic working cylinder, wherein upon actuation of this first drive 21 depending on the direction of action of the load arm of this first lever arrangement 18 arranged printing form cylinder or plate cylinder 04 either from a blanket z. B. the segment wheel 03 is turned off or employed on the same. To limit the printing forme cylinder or plate cylinder 04 against the relevant blanket z. B. the segment wheel 03 exerted contact pressure, for example, for the power arm of the first lever assembly 18 a first stop 22 provided by means of which a by the pivotal movement of the plate cylinder or plate cylinder 04 against the segment wheel 03 limited path is limited. With the first drive 21 is that of the plate cylinder or plate cylinder 04 against the segment wheel 03 applied contact force adjustable.

In the preferred embodiment is also the inking roller 07 in particular at both ends on a load arm of a preferably one-sided second lever arrangement consisting of a force arm and the load arm 23 stored, wherein the power arm and the load arm of this second lever arrangement 23 together around the axis parallel to the plate cylinder 04 directed first axis of rotation 19 are pivotable. Likewise, in the preferred embodiment, the anilox roller 08 in particular at both ends on a load arm of a preferably one-sided third lever arrangement consisting of a force arm and the load arm 24 stored, wherein the power arm and the load arm of this third lever arrangement 24 together around an axis parallel to the anilox roller 08 directed second axis of rotation 26 are pivotable, wherein the second axis of rotation 26 the third lever arrangement 24 on the second lever arrangement 23 is arranged, wherein the second axis of rotation 26 on the second lever arrangement 23 is formed stationary. On the load arm of the first lever arrangement 18 is a in its operation on the power arm of the second lever arrangement 23 acting preferably controllable second drive 27 arranged, by means of which the inking roller 07 depending on the effective direction of the second drive 27 to the plate cylinder 04 adjustable or can be turned off. On the load arm of the second lever arrangement 23 is a in its operation on the power arm of the third lever arrangement 24 acting preferably controllable third drive 28 arranged, by means of which the anilox roller 08 preferably together with the chamber doctor blade system 09 depending on the effective direction of the third drive 28 to the inking roller 07 adjustable or can be turned off. The second drive 27 and / or the third drive 28 are each z. B. also formed in the form of a hydraulic or pneumatic working cylinder. It can be provided that the second drive 27 and the third drive 28 z. B. together and preferably also be operated simultaneously or at least actuated. The pivoting movement of the load arm of the second lever arrangement 23 is z. B. by a preferably adjustable, in particular adjustable by an eccentric first stop system 29 limited, which also eliminates the inking roller 07 against the plate cylinder or plate cylinder 04 applied contact pressure is limited or at least limited. The pivoting movement of the load arm of the third lever arrangement 24 is z. B. by a preferably adjustable, in particular adjustable by an eccentric second stop system 31 limited, which also causes the anilox roller 08 against the inking roller 07 applied contact pressure is limited or at least limited. 2 shows by way of example a first operating state, in which the first drive 21 and the second drive 27 and the third drive 28 each unactuated or in their idle state, whereby the anilox roller 08 to the inking roller 07 and the inking roller 07 to the printing plate cylinder or plate cylinder 04 and the plate cylinder or plate cylinder 04 to the segment wheel 03 are employed respectively. 3 shows by way of example a second operating state in which the first drive 21 and the second drive 27 and the third drive 28 respectively actuated or in their working state, whereby the anilox roller 08 from the inking roller 07 and the inking roller 07 from the plate cylinder or plate cylinder 04 and the plate cylinder or plate cylinder 04 from the segment wheel 03 each are turned off. 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 in the respective above-described assignment of either the plate cylinder or plate cylinder 04 or the inking roller 07 or the anilox roller 08 is arranged. The three aforementioned lever arrangements 18 ; 23 ; 24 are each arranged in different spaced-apart vertical planes, so that they do not interfere with each other in their respective pivoting.

LIST OF REFERENCE NUMBERS

01

Hollow body; Two-piece can

02

Mandrelrad

03

segmented

04

plate cylinder

05

06

inking

07

Inking roller

08

anilox roller

09

Chambered doctor blade system

10

11

engine

12

engine

13

riding roller

14

record changer

15

16

bearing surface

17

traverse

18

Lever arrangement, first

19

Rotation axis, first

20

21

Drive, first

22

Stop, first

23

Lever arrangement, second

24

Lever arrangement, third

25

26

Rotation axis, second

27

Drive, second

28

Drive, third

29

Stop system, first

30

31

Stop system, second

d04

outer diameter

d07

outer diameter

d08

outer diameter

G

Just

Claims (10)

Inking unit ( 06 ) of a printing unit, wherein the inking unit ( 06 ) an ink from a color reservoir receiving anilox roller ( 08 ) and one to a printing plate cylinder ( 04 ) of the printing unit engageable inking roller ( 07 ), wherein an outer diameter (d07) of the inking roller ( 07 ) and an outer diameter (d04) of the printing forme cylinder occupied by at least one printing form ( 04 ) are equal in terms of amount, the printing forme cylinder ( 04 ) and the anilox roller ( 08 ) each independently by a variable in its respective speed motor ( 11 ; 12 ) are rotationally driven, wherein the inking roller ( 07 ) from the anilox roller ( 08 ) is rotationally driven by friction, wherein a speed of the inking roller ( 07 ) is provided detecting encoder, wherein a control unit is provided, said control unit based on the signal generated by the encoder, the speed of the inking roller ( 07 ) by means of the rotation of the anilox roller ( 08 ) adjusts or tracks such that a synchronization between the printing plate cylinder ( 04 ) and the inking roller ( 07 ) is set so that the peripheral speed of the inking roller ( 07 ) with the peripheral speed of the plate cylinder ( 04 ) within previously defined permissible tolerance limits. Inking unit ( 06 ) according to claim 1, characterized in that the control unit has a peripheral speed of the anilox roller ( 08 ) is set such that this relative to a peripheral speed of the printing forme cylinder ( 04 ) has a lead or lag. Inking unit ( 06 ) according to claim 2, characterized in that the peripheral speed of the anilox roller ( 08 ) the lead or lag with respect to the peripheral speed of the plate cylinder ( 04 ) during the adjustment phase performed by the control unit. Inking unit ( 06 ) according to claim 2 and / or 3, characterized in that the peripheral speed of the anilox roller ( 08 ) the lead or lag with respect to the peripheral speed of the plate cylinder ( 04 ) for a short time. Inking unit ( 06 ) according to claim 1 and / or 2 and / or 3 and / or 4, characterized in that the anilox roller ( 08 ) has a coated with a ceramic shell surface. Inking unit ( 06 ) according to claim 1 and / or 2 and / or 3 and / or 4 and / or 5, characterized in that the anilox roller ( 08 ) Has a Haschur or a cell structure on its lateral surface. Inking unit ( 06 ) according to claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6, characterized in that the inking roller ( 07 ) has a closed lateral surface. Inking unit ( 06 ) according to claim 7, characterized in that the inking roller ( 07 ) has a rubberized lateral surface. Device for printing on each of a lateral surface having hollow bodies, said device being an inking unit ( 06 ) according to at least one of claims 1 to 8. Apparatus according to claim 9, characterized in that a rotating about a rotation axis transport device is provided, said transport device to be printed hollow body along at least one part a circular path transported in a printing area of the printing unit.

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