EP4108459A1 - Système d'impression et procédé de fonctionnement d'un système d'impression - Google Patents

Système d'impression et procédé de fonctionnement d'un système d'impression Download PDF

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Publication number
EP4108459A1
EP4108459A1 EP21181842.2A EP21181842A EP4108459A1 EP 4108459 A1 EP4108459 A1 EP 4108459A1 EP 21181842 A EP21181842 A EP 21181842A EP 4108459 A1 EP4108459 A1 EP 4108459A1
Authority
EP
European Patent Office
Prior art keywords
printing
conveyor
printing machine
hollow bodies
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21181842.2A
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German (de)
English (en)
Inventor
Alexander Hinterkopf
Martin Frank
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hinterkopf GmbH
Original Assignee
Hinterkopf GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hinterkopf GmbH filed Critical Hinterkopf GmbH
Priority to EP21181842.2A priority Critical patent/EP4108459A1/fr
Publication of EP4108459A1 publication Critical patent/EP4108459A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/08—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces
    • B41F17/14—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length
    • B41F17/20—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors
    • B41F17/22—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for for printing on filamentary or elongated articles, or on articles with cylindrical surfaces on articles of finite length on articles of uniform cross-section, e.g. pencils, rulers, resistors by rolling contact

Definitions

  • the invention relates to a printing system for printing cup-shaped hollow bodies and a method for operating a printing system.
  • a known printing system is part of a production line for the production of aerosol cans, such as those produced and marketed by the applicant.
  • An aerosol can can be used, for example, as packaging for cosmetics such as hairspray, deodorants or for other substances to be sprayed as an aerosol, in particular powders or liquids.
  • a production line for the production of aerosol cans typically includes all the process stations that are necessary to produce a fillable aerosol can from a disc-shaped aluminum blank.
  • process steps such as an extrusion process to produce a cup-shaped blank from the disc-shaped aluminum blank, such as a trimming process, a brushing process and a printing process for the cup-shaped blank can be provided in order to then be able to shape it into the desired geometry on a drawing-in machine.
  • Modern production lines are now operated at a cycle rate of more than 180 can blanks or hollow bodies per minute.
  • the number of aerosol cans to be produced with a specific printed image is becoming increasingly smaller, so that the company the production line has to be interrupted frequently in order to change over the printing press, such as that used in the EP 1 466 827 A1 is known to be able to perform on the subsequent print motif.
  • provision can be made for arranging storage devices between the process stations that are designed for intermediate storage of aerosol can blanks, with these storage devices representing an additional cost factor and requiring additional space.
  • the object of the invention is to provide a printing system with which the duration of an operational interruption, such as that which can be carried out to carry out a print image change, can be reduced.
  • the printing system has a first printing press with a first machine frame on which a first indexing star is mounted so that it can rotate about a first indexing star axis and a first turret head is mounted so that it can rotate about a first turret axis aligned parallel to the first indexing star axis, with the first turret head having a is assigned to the first printing unit and the first switching star is designed for feeding hollow bodies to the first turret head, and has a second printing machine with a second machine frame, on the second switching star rotatable about a second switching star axis and a second turret head rotatable about a parallel to the second switching star axis aligned second turret axis are mounted, wherein the second turret head is assigned to a second printing unit and wherein the second switching star is designed for a supply of hollow bodies to the second turret head, the first printing machine and the second printing machine are accommodated on a guide device
  • a first printing machine forms an assembly with a second printing machine, which can preferably be equipped to carry out the same printing process, but can also be equipped to carry out a different printing process.
  • the subassembly made up of the first printing machine and the second printing machine is associated with those transport components that are required for precise implementation of the printing process.
  • first turret head which interacts directly with the inking units of the first printing press
  • second turret head which interacts directly with the inking units of the second printing press
  • a first switching star wheel assigned to the first turret head and a second switching star wheel assigned to the second turret head also form further essential transport components that are associated with the first printing press or the second printing press.
  • the first switching star is assigned a first push-on device, with the aid of which hollow bodies accommodated on the first switching star, in particular using negative pressure, can be pushed onto the spindles to be arranged opposite one another of the first turret head, also referred to as the spindle plate.
  • a second push-on device is assigned to the second star wheel, with the help of which hollow bodies accommodated on the second star wheel, in particular using negative pressure, can be pushed onto the opposite spindles of the second turret head, also known as the spindle plate.
  • the first printing press also includes the first turret, the first indexing star and the first push-on device and forms a subassembly with the second printing press, which, in addition to the second inking units, also includes the second turret, the second indexing star and the second pushing-on device.
  • This subassembly is accommodated on a guide device which is designed to bring one of the two printing machines into a functional position relative to a conveyor device, the conveyor device forming part of the production line into which the respective printing machine is integrated.
  • the printing machine that is in the functional position is an integral part of the production line, while the other printing machine that is arranged away from the conveyor in a maintenance position is not to be regarded as part of the production line at this point in time and is, for example, intended for use in the Production line can be prepared (set up).
  • the printing machine that is in the maintenance position can be prepared for its use in the production line in such a way that at the time a desired change of the print image, only a movement of the assembly of the first printing press and the second printing press is undertaken such that the printing press previously located in the maintenance position is transferred to the functional position, while the printing press previously arranged in the functional position is moved into the maintenance position.
  • the print image can be changed within a few minutes and the adjustment measures on the printing machine that was prepared in the maintenance position and has now been transferred to the mode of operation can be so advanced that either the further processing of hollow bodies can be continued directly or with little adjustment work, the further processing of hollow bodies can be resumed after a short time.
  • the guide device has a swivel joint for a swiveling mounting of the first printing machine and the second printing machine about a common swivel axis aligned transversely to the first turret axis and the second turret axis, in particular perpendicularly aligned.
  • pivotable mounting With this pivotable mounting, a movement process to be carried out precisely for the transfer of the respective printing press from the functional position to the maintenance position or from the maintenance position to the functional position is possible a joint pivoting movement about the pivot axis of the pivot joint, which is assigned to the guide device, can be carried out.
  • the pivot axis of the swivel joint and the first turret axis aligned transversely to each other. Provision is preferably made for the pivot axis to be aligned vertically, ie in the direction of gravity or the center of the earth.
  • first printing press and the second printing press are aligned axially symmetrically to the pivot axis and that the pivot joint is designed for a pivoting movement of the first printing press and the second printing press with a pivoting angle of 180 degrees.
  • the axially symmetrical arrangement of the first printing press and the second printing press ensures that each printing press assumes exactly that position during the pivoting movement about the pivot axis that previously held the other press. This is particularly important with regard to the function of the supply of hollow bodies to the respective printing machine in the production line, since there a reliable supply of hollow bodies by a conveyor and a reliable and precise removal of hollow bodies by the conveyor should be guaranteed.
  • the swivel joint is designed for a swivel angle of 180 degrees . Accordingly, a rotation of 180 degrees clockwise or counterclockwise takes place for the change of the respective printing machine from the functional position to the assigned maintenance position.
  • a swivel angle of more than 180 degrees, in particular an unlimited swivel angle for the swivel joint, can be implemented if the energy supply, in particular the electrical supply of the first printing machine and the second printing machine, is realized using an endlessly justifiable rotary feeder.
  • a development of the invention provides that the first machine frame is firmly connected to the second machine frame or that the first machine frame is designed in one piece with the second machine frame and that the first turret axis is parallel to the second turret axis is aligned.
  • the fixed coupling of the first machine frame to the second machine frame makes it considerably easier to position the first printing machine and the second printing machine in the respective functional position.
  • a fixed connection between the first machine frame and the second machine frame can be provided by directly coupling the two machine frames. Alternatively, it can be provided that both the first machine frame and the second machine frame are each firmly connected to the guide device without there being direct contact between the first machine frame and the second machine frame.
  • first printing press and the second printing press are provided with a common machine frame. In this way, a particularly precise alignment of the two printing presses with one another can be ensured. It is also provided that the first turret axis is aligned parallel to the second turret axis and that the first turret axis and the second turret axis span a turret axis plane whose surface normal is aligned parallel to the pivot axis.
  • the guide device has a linear guide for a linearly movable mounting of the first printing machine and the second printing machine along a movement path.
  • a configuration of the guide device can be implemented either in combination with a pivot bearing or without a pivot bearing.
  • a linear displacement of the guide device with the two printing machines attached to it is of particular interest when a displacement of the conveying device, which is used for the supply and removal of hollow bodies to the two printing machines or from the both printing presses, would pose considerable technical difficulties.
  • the guide device were designed as a pure linear guide without a swivel joint, the first printing machine and the second printing machine could be designed to be largely mirror images, with the respective turret head and the respectively assigned star wheel having to be aligned in the same direction on both printing machines in order to achieve an advantageous connection to the to ensure funding.
  • a guide device which, in addition to the linear guide, also includes a pivoting joint, a sequential sequence of a linear movement and a pivoting movement or a superimposition of a linear movement and a pivoting movement can optionally be provided.
  • the movement path that is determined by the guide device is either a straight line or a sequence of a straight line and a curve or a curve.
  • the guide device is assigned a conveyor device on which a section of a chain conveyor device and a take-off unit, in particular designed as a transfer drum or as a transfer conveyor belt, are attached, the take-off unit for pulling hollow bodies off conveyor rods of the chain conveyor device and for transferring the hollow bodies is formed on the adjacent arranged first switching star or second switching star.
  • the conveying device has the task of providing hollow bodies from a preceding process station to the first printing machine or the second printing machine, it being assumed that the conveying device is an integral part of a production line for the production of hollow bodies, in particular aerosol can blanks.
  • the Conveyor device is connected to a storage device, which in turn is connected to a preceding process station, so that hollow bodies provided by the preceding process station can be used temporarily to accommodate hollow bodies in the event that the first printing machine is replaced by the second printing machine or in the opposite direction, without that the previously preceding process station has to be temporarily shut down.
  • the storage device can in particular be designed as a chain store and is directly connected to the conveyor device of the printing system, so that the hollow bodies output by the storage device can then be fed to the first printing press or the second printing press.
  • the hollow bodies pushed onto conveyor rods of a chain conveyor device are pulled off the respective conveyor rod with a take-off unit in the course of a linear movement aligned in the direction of a longitudinal axis of the respective hollow body and transferred to the adjacently arranged first switching star or second switching star of the respective printing press.
  • the take-off unit can be designed as a transfer drum, in which linearly movable vacuum shells are provided on an outer surface of a drum, the axis of rotation of which is aligned parallel to the first switching star axis or second switching star axis, for adhesion to the hollow bodies that are accommodated on the conveyor rods.
  • a synchronized linear movement of the vacuum shells takes place parallel to the axis of rotation of the transfer drum in order to carry out the desired withdrawal movement.
  • a handover of the deducted Hollow bodies are made in the manner of a rolling movement with the respective associated first or second star switch.
  • a conveying direction of the transfer conveyor belt runs at an acute angle to the conveying direction of the chain conveyor device and thus the hollow bodies coming into contact with the transfer conveyor belt in the course of a superimposition of two linear movements, of which the first is aligned parallel to the conveying direction of the chain conveyor device and the second is aligned transversely to the conveying direction of the chain conveyor, can be deducted from the conveyor rods of the chain conveyor and transferred to the respectively assigned first or second switching star.
  • first printing machine is assigned a first push-on device, which is designed for transferring hollow bodies from the first turret to the conveyor rods of the chain conveyor device
  • second printing machine is assigned a second push-on device, which is designed for transferring hollow bodies from the second turret is formed on the conveyor rods of the chain conveyor.
  • first turret head and the second turret head which can each also be referred to as spindle plates, each have a predetermined, in particular an identical, number of parallel to the first turret axis or to the second turret axis and on a coaxial to the respective turret axis arranged pitch circle arranged spindles, which are each provided for receiving hollow bodies.
  • These spindles can each be provided with an associated rotary drive in order to produce a rolling movement during the printing process to be able to carry out this on a printing blanket provided with the motif to be printed.
  • the task of the attachment device is then to remove the freshly printed, preferably ready-dried, hollow bodies from the spindles mounted precisely on the turret head without damaging them, so that they can then be transferred to the chain conveyor device.
  • each of the two printing presses is assigned a separate attachment device, since this ensures maximum precision for removing the hollow bodies from the spindles.
  • the process of slipping onto the conveyor rods of the chain conveyor device is significantly less critical, although there is an aging or The wear and tear of the conveyor chain must be taken into account.
  • the first attachment device is arranged on the first machine frame of the first printing press, while the second attachment device is arranged on the second machine frame of the second printing press.
  • the conveying device is assigned an attachment device which is designed for transferring hollow bodies from the first turret head or from the second turret head to the conveying rods of the chain conveyor device.
  • the (single) slip-on device is not assigned to the respective printing press, but rather is a component of the conveying device. Accordingly, the push-on device is not also pivoted during the pivoting movement of the first printing press and the second printing press, but rather is arranged in a stationary manner on a machine frame provided for the conveying device.
  • the conveying device with the first printing machine or with the second printing machine determines a conveying path for the hollow bodies, which runs along a first section of the chain conveyor device, the take-off unit, the first printing machine with the first loading star and the first turret head or the second printing machine with the second loading star and the second turret head and the respectively associated push-on device extends to a second section of the chain conveyor device. It is crucial that one of the two printing presses can be engaged in this conveying path and for this purpose at least includes the respective loading star and the respective turret. Depending on the needs, the attachment device can be assigned either directly to the respective printing machine or to the conveyor device.
  • the chain conveyor can comprise a single conveyor chain or a combination of a first conveyor chain and a second conveyor chain.
  • the chain conveyor device comprises a first conveyor chain section, which is assigned to the take-off unit and a second conveyor chain section, which is assigned to the attachment device, with the first conveyor chain section being associated with a first conveyor chain and wherein the second conveyor chain section is associated with a second conveyor chain.
  • the first conveyor chain extends as an endlessly circulating conveyor chain between the process station preceding the printing system and the printing system, optionally with the interposition of a corresponding storage device.
  • the second conveyor chain is designed as an endlessly revolving conveyor chain between the printing system and a subsequent process station, in particular with the interposition of a storage device.
  • a conveying speed of the first conveyor chain and a conveying speed of the second conveyor chain are identical with regard to the number of hollow bodies provided or removed per unit of time, with a spatial division of the conveyor rods of the first conveyor chain and the second conveyor chain not necessarily having to be identical .
  • the guide device comprises a linear bearing device which is used to move the conveyor device between a working position for interaction with the first printing press or the second printing press and a changing position for carrying out the pivoting movement for the first printing press and the second printing press is trained.
  • a linear movement for the conveyor device is of particular importance when the guide device for the first printing press and the second printing machine only provides a swivel joint, so that due to the spatial configuration of the first printing press and the second printing machine and to avoid collisions with the conveyor device linear displacement of the conveyor is necessary.
  • the conveyor in a horizontal direction is aligned transversely to the first turret axis and to the second turret axis, can be removed from the first printing press and the second printing press in order to enable the implementation of the pivoting movement for the first printing press and the second printing press in a changing position.
  • the conveying device is then transferred back into the working position by means of a linear displacement with the aid of the linear bearing device and can ensure the desired supply and removal of hollow bodies there.
  • At least one conveyor chain is typically assigned to the conveyor device, with chain link axes of the chain links of the conveyor chain being aligned transversely to the linear movement axis, which is determined by the linear bearing device.
  • a linear displacement of the conveyor device is to be provided in a spatial direction which is aligned transversely to the chain link axes of the chain links of the conveyor chain.
  • a pivoting movement of the conveyor device can also be provided about a pivot axis, in particular a horizontally aligned pivot axis, which is aligned parallel to the chain link axes of the chain links of the conveyor chain.
  • the pivot joint comprises at least one bearing from the group: roller bearing, plain bearing, hydrostatic plain bearing, and if the pivot joint is assigned a drive device for initiating a pivoting movement on the first printing machine and the second printing machine.
  • the swivel joint preferably comprises a combination of one or more roller bearings, with which the precise spatial alignment of the first printing machine and the second printing machine can be guaranteed, with a plain bearing or a hydrostatic plain bearing, which is used to absorb the considerable weight of the first printing machine and the second printing machine are trained. It can be assumed that the combination of the first printing press and of the second printing machine has a weight in a range from 2000 kilograms to 6000 kilograms.
  • a fluid in particular compressed air, is pressed in a bearing gap between a bearing surface assigned to the first and second printing machine and a second bearing surface assigned to a machine foundation of the printing system, in order to form a fluid film on which a relative movement of the first Printing machine and the second printing machine can be carried out at least almost without friction.
  • first supply lines for the first printing press and second supply lines for the second printing press are accommodated in a common line channel, which is preferably aligned coaxially to the pivot axis and is designed for pivoting the first supply lines and the second supply lines. It is advantageous if the first supply lines and the second supply lines, which are accommodated in the line duct, only perform a rotational movement when carrying out the pivoting movement for the first printing press and the second printing press, which can be ensured by arranging the line duct coaxially to the pivot axis.
  • first and second supply lines are routed at an end region facing away from the first printing press and the second printing press in a helically adjustable drag chain that is arranged, for example, on the ceiling of a machine room in which the printing system and the entire production line are set up are. In this way, an exclusive bending deformation for the first and second supply lines can be ensured during the pivoting movement of the first printing machine and the second printing machine.
  • the object of the invention is achieved by a method for operating a printing system, in which the following steps are provided: providing cup-shaped hollow bodies with a conveyor device to a first printing machine and printing the hollow bodies in the first printing machine with a first printed image and Transporting the printed hollow bodies away from the first printing machine with the conveyor device; Providing cup-shaped hollow bodies, in particular with a feed device, to a second printing machine and carrying out an adjustment process on the second printing machine and printing the hollow bodies with a second printed image and transporting the printed hollow bodies away from the second printing machine, in particular with a removal device; Interrupting the provision of cup-shaped hollow bodies and performing a common displacement movement, in particular a pivoting movement, of the first printing press and the second printing press relative to the conveyor device in order to remove the first printing machine from a functional position relative to the conveyor device and to move the second printing machine into the functional position relative to the conveyor device bring to; Providing cup-shaped hollow bodies with the conveyor to the second printing machine and printing the hollow bodies in the second printing machine with
  • a printing system 1 is shown, as can be used in a production line, not shown in detail, for the production of packaging tubes or packaging cans, in particular aerosol cans.
  • a production line includes all process steps from the provision of a tube or can material blank, which can be provided in the form of a coin-shaped aluminum round, for example, to the fillable packaging designed as a tube or can.
  • the task of the printing system integrated into the production line is to print an outer surface of the packaging tube or packaging can with a visually appealing decoration to be provided, for which purpose typically printing methods such as screen printing or flexographic printing or letterpress/dry offset are used.
  • the printing system 1 includes a first printing machine 10 and only in the figures 2 and 3 visible second printing press 20.
  • first printing press 10 and the second printing press 20 are designed to be completely identical, so that in the following description, to avoid repetition, only the first printing press 10 is described and the relevant statements are made in the same way for the Printing machine 20 apply, the same designations with reference numerals increased by 10 being used for the second printing machine 20 .
  • the printing system includes a conveyor 30, which according to the representations of figures 1 and 2 is designed to provide unprinted hollow bodies 2, ie unprinted tubes or can blanks, to the first printing machine 10 and to remove printed hollow bodies 2, and is part of a transport system of the production line, not shown in detail.
  • the conveying device enables, for example, unprinted hollow bodies to be fed in from a preceding process station in the production line and the printed hollow bodies to be transported further to a downstream process station.
  • the first printing machine 10 comprises a printing unit 11, which is provided with a plurality of inking units 12 designed as a function of the printing process to be carried out (in particular screen printing or flexographic printing or letterpress/dry offset). Furthermore, the first printing machine 10 comprises a first turret head 13, which is also referred to as a spindle plate and which is arranged on a carrier plate 55 and has a plurality of circular-cylindrical heads trained and rotatably mounted on the support plate 55 spindles 16. For example, each of the spindles 16 is associated with a drive device, not shown, so that each of the spindles 16 is transverse to the plane of the figure 1 aligned central axis can be rotated individually.
  • first turret head 13 is parallel to the central axes of the spindles 16 and thus also transverse to the plane of the figure 1 aligned first turret axis 19 is rotatably mounted on a first machine frame 61.
  • a drive device not shown, is provided for initiating a rotational movement on the first turret head 13, which drive device can be designed, for example, as an electric server motor.
  • the first turret 13 is arranged on the first printing unit 11 in such a way that it has an overlap with the first printing unit 11 .
  • one of the first spindles 16 can be fed to the first printing unit 11 in such a way that ink can be applied to the outer surface of the hollow body and, if necessary, drying of this ink application can be ensured before the printed hollow body can first printing unit 11 leaves.
  • a first indexing star 14 is assigned to the first turret head 13, which is rotatably mounted on the first machine frame 61 and is provided with a drive device, not shown in detail, in order to enable a rotational movement of the first indexing star 14 about a first indexing star axis 19 aligned parallel to the first turret axis 18.
  • trough-like receiving shells 57 are provided at regular angular intervals along the first star switch axis 19 and are constantly formed with an arc-shaped profile.
  • the receiving trays 57 are in a manner not shown with Vacuum bores are provided, so that a hollow body 2 fed into the region of the respective receiving shell 57 can be adhered to the respective receiving shell 57 by the action of a vacuum.
  • the first star wheel 14 enables hollow bodies 2 to be picked up, for example at an end region 32 of a transfer conveyor belt 31 associated with the conveyor device 30, and the hollow bodies 2 to be fed to the first turret head 13.
  • a first push-on device 15 is provided for transferring the hollow bodies picked up on the respective receiving shells 57 of the first star wheel 14 2 to the first turret 13.
  • the push-on device 15 comprises a push-on housing 58 which is fixed to the first machine frame 61 and in which a linear drive device, not shown in detail, is accommodated.
  • the linear drive device is designed to initiate movement on a slide 59 which is mounted on the slide housing 58 so that it can move linearly parallel to the first turret axis 18 and to the first star wheel axis 19 and which is intended to rest on a bottom region of the hollow body 2 in order to push this hollow body 2 onto the spindle 16 arranged opposite in each case of the turret 13 defer.
  • the position of the spindle 16 at which the pushing-on process for the hollow body 2 is carried out by the first star wheel 14 can also be referred to as the loading position.
  • the hollow body 2 is first fed to the printing unit 11 in the course of several successive rotary step movements, which are carried out purely as an example in a clockwise direction, where the decoration of the hollow body 2 is carried out.
  • the now printed hollow body 2 is further transported in the course of further rotary step movements of the first turret 13 to an unloading position at which a first mounting device 17 is arranged.
  • the task of the first Attachment device 17 consists of gripping the hollow body 2 at the bottom area or sucking it in by vacuum and, in a subsequent step, initially pulling it off the respective spindle 16 by means of a linear movement aligned parallel to the first turret axis 18 .
  • the push-on device 17 pivots about a pivot axis 60 in order to push the hollow bodies 2 onto second conveyor rods 38 of a second conveyor chain section 36 of a second conveyor chain 34 .
  • the attachment device 17 is provided for the simultaneous gripping of two hollow bodies 2, which are attached to the second conveyor rods 38 of the second conveyor chain section 36; alternatively, only one hollow body 2 or three hollow bodies 3 can be gripped with an attachment device (not shown).
  • the first push-on device 17 is fixed to the first machine frame 61 of the first printing machine 10 and thus belongs to the first printing machine 10 . Accordingly, the second printing press 20 is also assigned a second push-on device 27 .
  • the slip-on device In a non-illustrated embodiment of a printing system, provision can be made for the slip-on device to be provided as part of the conveying device, so that in this case only a single slip-on device is required.
  • the first machine frame 61 of the first printing press 10 and the second machine frame 62 of the second printing press 20 are rigidly coupled to one another and are rotatably movable about a pivot axis 64, which is preferably aligned vertically, on a pivot joint 63, which is only shown schematically and is embodied, for example, as a roller bearing arrangement, on a guide device 3 stored.
  • the guide device 3 forms the machine foundation for the printing system 1 is thus designed to absorb all weight forces which are caused by the mass of the first printing machine 10, the second printing machine 20 and the conveyor device 30.
  • a hydrostatic slide bearing 4 is formed, in which two bearing surfaces 5, 6, each aligned transversely to the pivot axis 64, lie opposite one another.
  • a pressurized fluid in particular compressed air, can be introduced between the two bearing surfaces 5, 6 in order to form a fluid film with which an almost friction-free relative movement between the two bearing surfaces 5, 6 is made possible in order to achieve a pivoting movement of the first printing machine 10 and the second printing machine 20 to allow the pivot axis 64.
  • the subassembly consisting of the first machine frame 61 and the second machine frame 62 is assigned a duct 7 aligned coaxially with the pivot axis 64 .
  • This line channel 7 is provided to accommodate electrical supply lines and electrical communication lines (not shown) and, if necessary, compressed air lines and/or hydraulic lines.
  • the lines accommodated in the line duct 7 are suspended from a hall ceiling of the factory building in which the production line is set up, so that during the intended pivoting movement for the assembly of the first printing machine 10 and the second printing machine 20 there is only a slight torsion of the respective supply lines occurs. This is based on the fact that the pivoting movement is carried out in an angular range of 180 degrees.
  • the conveyor device 30 is also accommodated on the guide device 3 , with the guide device 3 comprising a linear bearing for the conveyor device 30 .
  • the conveyor 30 from the figures 1 and 2 shown working position in a spaced from the first printing press 10 and the second printing press 20 arranged changing position.
  • the pivoting space required for the pivoting movement of the first printing press 10 and the second printing press 20 about the pivot axis 64 is made available.
  • the conveyor device 30 comprises a first conveyor chain section 35 of a first conveyor chain 33, with the first conveyor chain 33 being able to be coupled, in a manner illustrated in more detail, to a preceding process station which is arranged upstream in the production line and is likewise not illustrated, from which in a preceding Process step processed and transported by the first conveyor chain 33 to the printing system 1 hollow body 2 are provided.
  • the first conveyor chain section 35 extends in sections parallel to a horizontally oriented upper side 39 of the transfer conveyor belt 31.
  • the distance between the first conveyor rods 37 of the first conveyor chain section 35 and the upper side 39 is selected in such a way that the hollow bodies 2 rest on the transfer conveyor belt 31 and can be pulled off the first conveyor rods 37 in the course of a transfer movement oriented obliquely to the conveying plane of the first conveyor chain 33 .
  • the hollow bodies 2 that have been completely withdrawn from the conveyor rods 37 can then be transferred to the first switching star wheel 14 at the end region 32 of the transfer conveyor belt 31 .
  • An operating mode for the printing system 1 can be described as follows: at a given point in time it is assumed that the printing system 1 integrated in a production line, not shown, from a process station arranged upstream in the process direction and transport direction of the hollow body 2 using the first conveyor chain 33 is supplied with hollow bodies 2 to be printed in the course of a continuous circulation movement. These hollow bodies 2 are placed by the first conveyor chain section 35 on the upper side 39 of the transfer conveyor belt 31 and are pulled off the first conveyor rods 37 by the transport movement of the transfer conveyor belt 31, which is aligned at an acute angle to the conveying plane of the first conveyor chain section, and are transferred to the first switching star wheel 14 at the end region 32 of the transfer conveyor belt 31.
  • the first switching star 14 transports the hollow bodies 2 adhering with their outer surface to the receiving shells 57 in a sequence of rotary step movements into a detection area of the pusher 59, which pushes the hollow body 2 exactly opposite one spindle 16 in the course of a linear push-on movement onto the respective spindle 16 of the first Turret 13 defers.
  • the hollow bodies 2 are fed to the first printing unit 11 by a sequence of rotary stepping movements and are provided with the intended decoration, which can also be referred to as the first printed image. Subsequently, the hollow bodies 2 are subsequently shifted into the detection range of the first attachment device 17 by means of further rotary incremental movements of the first turret head 13 .
  • two hollow bodies 2 each are grasped by the attachment device 17 and are attached to second conveyor rods 38 of the second conveyor chain section 36, it being assumed that the second conveyor chain 34, like the first conveyor chain 33, has a continuous circulating movement performs.
  • the second conveyor chain 34 is made for the second conveyor chain 34 to be coupled to a process station (not shown) arranged downstream (downstream) in the production line, to which the printed hollow bodies 2 are fed for carrying out further work processes.
  • a print image change can be carried out on the second printing press 20 .
  • provision can be made, for example, to equip the individual second inking units 22 of the second printing unit 21 with new printing plates or printing screens and then to carry out adjustment work for the respective second inking unit 22 .
  • This adjustment work can be carried out for a certain number of hollow bodies 2 under production conditions.
  • the second star wheel 24 is assigned a feed conveyor belt 45, shown only symbolically, on which, for example, 10 to 20 hollow bodies 2 can be placed, which are then moved by the second star wheel 24 in the same way as if the second printing machine 20 were integrated into the production line.
  • the second printing machine 20 can be adjusted in a manner as if it were would be in the production line and is thus prepared to immediately take over the printing of hollow bodies 2 in the production line.
  • the conveying movement for the first conveyor chain 33 is stopped in a first step in order to interrupt further supply of hollow bodies 2 to the transfer conveyor belt 31 and the first printing press 10.
  • provision can be made, for example, for the hollow bodies 2 provided by the preceding process station to be stored in a storage device (not shown) until the conveying movement for the first conveyor chain 33 can be resumed.
  • the first printing machine 10 is operated until all the hollow bodies 2 provided by the first conveyor chain 33 have been printed and transferred to the second conveyor chain section 36 of the second conveyor chain 34 via the first push-on device 17 .
  • the conveying movement for the second conveyor chain 33 is then also interrupted and the first printing unit 11 of the first printing press 10 and the second printing unit 21 of the second printing press 20 are stopped.
  • the conveyor device 30 is linearly displaced along the guide device 3 in order to increase a distance from the assembly of the first printing press 10 and the second printing press 20 .
  • the conveyor 30 is brought from its working position into a changing position, as in the figure 3 is shown.
  • Compressed air is then fed into the hydrostatic plain bearing 4 in order to form a fluid film between the first bearing surface 5 and the second bearing surface 6 .
  • the pivoting movement for the assembly of the first printing press 10 and the second printing press 20 about the pivot axis 64 can then be carried out, with the first printing press 10 being brought in the course of this pivoting movement from the functional position opposite the conveyor device 30 into a maintenance position away from the conveyor device 30 and wherein the second printing machine 20 is brought from the maintenance position away from the conveyor 30 into the functional position opposite the conveyor 30 .
  • the conveyor device 30 is then linearly displaced along the guide device 3 from the changing position into the working position, the distance from the assembly of the first printing press 10 and the second printing press 20 being reduced and the interaction between the conveyor device 30 and the second printing press 20 being made possible .
  • the conveying movements for the first conveyor chain 33 and the second conveyor chain 34 are then resumed and the printing unit 21 of the second printing machine 20 is put into operation, so that the hollow bodies 2 conveyed via the first conveyor chain 33 can now be provided with the printed image for the the second printing machine 20 has been set up and accordingly printed hollow bodies 2 can be transferred to the second conveyor chain 34 .
  • the first printing press 10 When the second printing press 20 is put into operation, the first printing press 10 can be converted without the production process in the production line being adversely affected as a result.
  • the printing machine 10 can in that Period of time to be converted to a new print image, within which the second printing press 20 processes the print job with the second print image.
  • the first printing press 10 can be adjusted completely or at least almost completely to the general production conditions, so that after a renewed pivoting process for the first printing press 10 and the second printing press 20, almost uninterrupted production in the production line with the now new print image of the first printing press 10 can be performed.

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EP21181842.2A 2021-06-25 2021-06-25 Système d'impression et procédé de fonctionnement d'un système d'impression Pending EP4108459A1 (fr)

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EP21181842.2A EP4108459A1 (fr) 2021-06-25 2021-06-25 Système d'impression et procédé de fonctionnement d'un système d'impression

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299298B (de) * 1967-03-20 1969-07-17 Hinterkopf Kurt G Vorrichtung zum Bedrucken, Lackieren oder Etikettieren von Hohlkoerpern beispielsweise Tuben
FR2748454A1 (fr) * 1996-05-09 1997-11-14 Fabre Rene Installation de marquage de produits
EP1466827A2 (fr) 2003-04-07 2004-10-13 Thomas Dr. Huth- Fehre Capteur pour surfaces
EP1468827A1 (fr) 2003-04-12 2004-10-20 HINTERKOPF GmbH Machine pour imprimer des objets creux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299298B (de) * 1967-03-20 1969-07-17 Hinterkopf Kurt G Vorrichtung zum Bedrucken, Lackieren oder Etikettieren von Hohlkoerpern beispielsweise Tuben
FR2748454A1 (fr) * 1996-05-09 1997-11-14 Fabre Rene Installation de marquage de produits
EP1466827A2 (fr) 2003-04-07 2004-10-13 Thomas Dr. Huth- Fehre Capteur pour surfaces
EP1468827A1 (fr) 2003-04-12 2004-10-20 HINTERKOPF GmbH Machine pour imprimer des objets creux

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