EP3044001B1 - Drucksystem und druckvorrichtung für flaschen oder behälter mit mehrteiligem versorgungstank sowie verfahren - Google Patents

Drucksystem und druckvorrichtung für flaschen oder behälter mit mehrteiligem versorgungstank sowie verfahren Download PDF

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Publication number
EP3044001B1
EP3044001B1 EP14753083.6A EP14753083A EP3044001B1 EP 3044001 B1 EP3044001 B1 EP 3044001B1 EP 14753083 A EP14753083 A EP 14753083A EP 3044001 B1 EP3044001 B1 EP 3044001B1
Authority
EP
European Patent Office
Prior art keywords
printing
tank
ink
tank part
printing system
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.)
Not-in-force
Application number
EP14753083.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3044001A1 (de
Inventor
Markus Reiniger
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.)
KHS GmbH
Original Assignee
KHS GmbH
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Filing date
Publication date
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Publication of EP3044001A1 publication Critical patent/EP3044001A1/de
Application granted granted Critical
Publication of EP3044001B1 publication Critical patent/EP3044001B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
    • B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles

Definitions

  • the invention relates to a printing system according to the preamble of claim 1 and to a printing apparatus according to the preamble of claim 14, and a method for mixing and stirring of printing ink or ink according to the preamble of the patent award 15th
  • Printing devices for printing on containers using digital, based on the inkjet or inkjet principle electric or electronic printheads are known in principle.
  • printing systems or printing machines are known in which a plurality of printing stations for receiving a respective container to be printed are formed on a rotatably driven around at least one vertical axis container transport element, in particular on a rotatably driven about a vertical machine axis rotor on which the container using be printed by electronically controllable, working on the inkjet or inkjet principle digital printheads.
  • the print heads are provided on a likewise about the at least one vertical axis circumferentially drivable print head transport element, which is for example the container conveyor or an independent transport element.
  • the printheads are located on a moving, for example, rotating part of the respective printing device or - machine.
  • Such printing devices typically have a first, stationary arranged, for example, on the floor upstanding printing device part and a second, moving relative to the first printing device part printing device part.
  • the print heads or the container carriers are arranged on the second printing device part.
  • the first printing device part has at least a part of a supply system for supplying the printing heads with printing ink or ink, in particular a tank for storing ink or ink.
  • a conduit system is provided with a rotary coupling arranged therein. ie the rotary joint forms the coupling piece between the stationary part and moving part of the pipe system.
  • the US 2011/285768 A1 a comparable printing device for containers, but in which the storage containers for the printing ink in the non-rotating machine part via liquid rotary distributor are connected to the rotating, upper printing machine part.
  • the object of the invention is to show a printing system, which allows optimized in terms of effort and placement coupling between the stationary part and moving part of the pipe system.
  • a printing system according to the patent claim 1 is formed.
  • a printing device is the subject matter of the independent patent claim 14.
  • a method for mixing and stirring printing ink or ink is the subject matter of the independent patent claim 15.
  • the invention relates to a printing system for printing on bottles or similar containers.
  • the Drucksystern has a moving, in particular rotationally moving printing system part on which at least one operating according to the ink jet principle and along a transport path for the container movable, preferably circumferentially movable electric or electronic printhead is provided for printing the respective arranged on a printing station container.
  • the printing system comprises a static, not with the printhead mitbewegten printing system part, the at least one Tank, hereinafter also referred to as the main tank, for receiving from the printhead to be supplied ink or ink.
  • the tank is designed in several parts, wherein a first tank part is arranged statically and a second tank part is formed mitbewegbar with the moving pressure system part. This can be achieved with reduced investment costs, a coupling between the static pressure system part and the moving pressure system part.
  • the first part of the tank forms, as a lower part of the tank, the receiving space for the ink or ink to be stored.
  • the receiving space is arranged statically and there are no movement-related forces, in particular centrifugal forces on the ink or ink.
  • the second tank part closes as the upper part of the tank, the first part of the tank.
  • a closed tank is obtained, the receiving space is completed to the outside.
  • the second tank part is formed as the first tank part occlusive lid.
  • the first and second tank part is fluid-tightly connected to each other.
  • the seal between the first and second tank part may be formed as an annular seal, for example as an O-ring or a sliding seal, for example comprising graphite or ceramic.
  • a gap seal in particular a liquid-filled gap seal.
  • This type of seal offers the advantage of a reduced coefficient of friction compared to the aforementioned types of seals.
  • the interior of the tank is designed to be acted upon with an inert gas to produce a barrier gas flow through a gap formed between the first and second tank part.
  • This barrier gas flow prevents the entry of ambient air into the receiving space, which has a positive effect on the shelf life of the ink or ink in the tank.
  • the second tank part is designed to be height adjustable relative to the first tank part.
  • the first tank part can be placed in an optimum height for the tightness of the tank or the friction between the first and second tank part.
  • the height adjustment can be achieved, for example, by length-adjustable coupling elements, by means of which the second tank part is mechanically connected to the moving pressure system part.
  • the first and / or second tank part is annular, in particular annular, with a central opening.
  • the opening With a centric arrangement of the tank in such a way that the center vertical axis of the tank coincides with the axis of rotation of the rotationally moved pressure system part, the opening thus comes to lie in the region of the axis of rotation. In this way, further lines can be routed through the tank or, within the opening, a drive for driving the moving pressure system section can be placed.
  • the second tank part has at least one tube-shaped conduit having a free end extends into the receiving space formed by the first tank part or the second tank part has a plurality of preferably angularly staggered spaced apart arranged tubular conduits whose free ends in the first Submerge tank part formed receiving space.
  • the moving printing system part and thus the movement of the coupled with the moving printing system part second part of the tank part of the at least one line is moved by the ink or ink, so that the ink or ink is thereby stirred. This prevents the sedimentation or a separation and separate deposition of the ink constituents.
  • the free end of the at least one line may have at least one laterally projecting stirring section.
  • This stirring section can, for example, by a laterally from the outer wall of the tubular Line protruding flat portion, for example, a flat material portion are formed. It is understood that several such Hinhrabitese can be provided on a line. As a result, the stirring or circulation effect is substantially improved.
  • the second tank part may have at least one stirring section extending into the receiving space of the first tank part.
  • This stirring section can be formed separately from the lines and be arranged, for example, projecting downwards at the cover section of the second tank part.
  • the first tank part on several separate chambers for receiving ink or ink.
  • a plurality of different printing inks or inks for example, with different colors, but also next to the ink or ink a cleaning fluid for cleaning the printheads can be added to the tank.
  • the moving printing system part in addition to the at least one print head on at least one auxiliary tank for the ink or ink to which the at least one print head is connected.
  • the co-moving or rotating part of the printing system has a plurality of print heads, and the at least one sub-tank is common to all the print heads.
  • the at least one auxiliary tank has a tank interior in communication with the at least one print head, which serves for receiving the printing ink or ink and for regulation of the ink level in the tank interior is formed with an overflow.
  • the co-moving part of the printing system on at least two Hilfstranks of which a first auxiliary tank serves as a single tank for supplying the at least one print head with ink.
  • a second auxiliary tank is provided as Austank for the at least one of the ink or ink flowed through during the printing operation printhead.
  • the at least one auxiliary tank is arranged centrically with respect to the vertical machine axis and / or rotationally symmetrical.
  • the at least one auxiliary tank is formed annular or circular cylindrical.
  • a line for feeding or discharging the printing ink or ink to or from the at least one auxiliary tank is arranged coaxially with the machine axis.
  • auxiliary tanks when using at least two auxiliary tanks, these are provided offset from one another in the direction of the machine axis or arranged or designed such that the first auxiliary tank is enclosed by the second auxiliary tank.
  • the moving or rotating part of the printing system is provided above the static part of the printing system or, with the exception of the at least one print head, the moving part of the printing system is enclosed by the static part of the printing system.
  • the means for controlling the pressure of the ink or ink in the at least one auxiliary tank and / or in the at least one printhead in dependence on the rotational or rotational speed of the printhead are formed, preferably for compensating the ink or ink applied centrifugal forces and / or to compensate resulting from acceleration and / or change direction and applied to the ink or ink forces.
  • the static part of the printing system has at least one main tank for the printing ink or ink and means for refilling ink or ink and / or for conditioning the ink or ink, in particular for tempering and / or degassing and / or Filter the ink or ink.
  • the printing system for an ink or ink cycle is formed within the static portion of the printing system or ink supply system and / or for an ink or ink cycle which includes the static portion of the printing system as well as the moving or rotating portion of the printing system.
  • the invention relates to a printing device for printing on bottles or similar containers with at least one circumferentially drivable container conveyor and with several formed on the container conveyor pressure stations, where the printing of the container is carried out in each case with at least one operating according to the inkjet principle digital printhead of a printing system ,
  • the printing system is designed according to one of the previously described embodiments.
  • the print heads are preferably provided on a movable transport element, preferably on a transport element which is movable about at least one vertical machine axis.
  • the printhead having transport element of the container conveyor or independent of the container conveyor transport element.
  • At least some of the different colors or color sets associated printing systems and their printheads are provided on a common or at different transport elements.
  • At least two container transporters are preferably provided consecutively in a transport direction of the containers, wherein at least one printing system for printing the containers with a color or with a color set of a multi-color print is provided on each container conveyor.
  • each printing position is designed for a relative movement between the print head and the container.
  • inert gas is understood as meaning gases which are very inert, ie. Participate in only a few chemical reactions. These are in particular CO2, N2 or sterile air.
  • Pulsation damper in the context of the invention are integrated in printing ink or ink-conveying lines integrated buffer elements having a receiving space for the ink or ink. Furthermore, these pulsation dampers can have a membrane which has a gas volume (eg air or nitrogen) from the receiving space for printing ink or ink. As a result, pressure fluctuations in the printing ink or ink-promoting lines or the print heads can be compensated.
  • a gas volume eg air or nitrogen
  • containers are in particular cans and bottles, in each case made of metal, glass and / or plastic, for example.
  • End shooter printheads in the sense of the invention are understood to mean printheads which each have only one connection via which the printing ink or ink is supplied at a predetermined pressure, for example with a slight negative pressure.
  • the ink or ink is continuously applied to the printhead and can exit the printhead via the nozzles alone.
  • “Side shooter printheads” in the sense of the invention are understood to mean printheads which have at least two connections, via which ink or ink is conveyed through the printhead in a cycle.
  • a transverse flow is preferably generated transversely to the nozzles of the print head.
  • 1 is a rotary type printing apparatus for printing on bottles or the like containers 2 by using ink jet or ink jet printing heads 3.
  • the print heads each have, for example, a plurality of nozzles 3.1 at each Printhead 3 are provided sequentially in a row in the vertical direction and are electrically controlled individually.
  • the application of the ink to the nozzles 3.1 is carried out by appropriate control of electrodes, valves, piezo elements or the like.
  • the printing apparatus 1 consists of a rotor 4 that revolves around a vertical machine axis MA, preferably continuously rotatable, on the circumference of which a plurality of printing stations 4. 1 are formed.
  • each printing station 4.1 is assigned in each case at least one print head 3, which is moved together with the respective printing station 4.1.
  • the containers 2 to be printed are fed to the printing stations 4.1 via a container inlet 6 and subsequently moved together with the printing head 3 assigned to this printing station, the printing of the container 2 taking place during this movement.
  • the printed containers 2 are taken from the respective printing station 4.1 at a container outlet 7.
  • the printing of the container 2 takes place at the printing stations 4.1 line by line by relative movement of the container 2 to the print head 3, in the illustrated embodiment in that each with its container axis in the vertical direction, ie parallel to the axis of rotation of the rotor 4 oriented container 2 during printing is rotated controlled by its container axis.
  • the printing device 1 has, as in FIG. 2 shown, a printing system 5, which consists of two components, namely from the in the FIG. 2 and 3 8 denotes the first, static pressure system part which is accommodated in the machine frame 9 of the printing device 1 which does not revolve around the rotor 4, and from the second, moving, in particular rotationally moving printing system part 10 which is provided on the rotor 4 and also has the print heads 3, inter alia. consists.
  • the static printing system part 8 includes i.a. at least one main tank 100 for receiving a supply of ink, as well as all functional elements for conditioning the ink, i. et al a temperature module 12 for constant temperature control (heating or cooling) of the ink in the main tank 100 and a degasser 13 and a filter 14 in a conveyor and circulation pump 15 having and the main tank 100 enclosing the first ink circuit for constant temperature control, degassing and filtering the ink.
  • the main tank 100 which is preferably partially filled with the printing ink, is subjected to a controlled pressure P100 during the printing operation, namely during the normal printing operation, for example with a pressure P100 which is slightly lower or higher than the ambient or atmospheric pressure.
  • the static pressure system part 8 further comprises a refill valve 16, via which the refilling of ink from cartridges 17 is possible.
  • a refill valve 16 via which the refilling of ink from cartridges 17 is possible.
  • a multi-way valve 18 which is arranged in the ink circuit of the static pressure system part 8 in the flow direction after the filter 14 and the main tank 100, or via a connected to the valve 18 line 19, the static part 8 of the pressure system 5 to a flow or Supply line 21 connected to valve 22 of the rotating part 10 of the printing system 5.
  • the main tank 100 is formed in several parts and consists of at least a first tank part 110 and a second tank part 120.
  • the first tank part 110 forms a receiving space 111 for the printing ink or ink, and has a bottom portion 110a and a projecting portion 110b projecting therefrom.
  • a cup-shaped first tank part 110 is formed which is open on the side opposite the bottom section 110a.
  • a feed line 110c may be provided for the ink or ink received in the receiving space 111.
  • the feed line 110c may be oriented differently than the vertical orientation shown.
  • a tangential feed of the printing ink or ink relative to the central vertical axis MHA can also take place in order to bring about a circular flow of the printing ink or ink within the receiving space 111.
  • the first tank part 110 is rotationally symmetrical with respect to its central vertical axis MHA.
  • the second tank part 120 is arranged above the first tank part 110 and closes the upper part of the tank formed in the first tank part 110 receiving space 111.
  • the second tank part 120 is lid-like and causes together with the upper free end of the conversion section 110b preferably a fluid-tight closure of the receiving space 111.
  • the second tank part on a flat-shaped cover portion 120.1, which causes the cover of the receiving space 111.
  • the second tank part 120 further comprises a conduit 121 in the form of a tube.
  • the line 121 forms a supply and / or return line for printing ink from the main tank 100.
  • the line 121 penetrates the cover section 120.1 preferably at right angles and extends with a first, lower free end 121.1 into the receiving space 111 of the first tank part 110 into it.
  • the lower free end 121.1 of the conduit 121 is located at a small distance from the bottom portion 110a, in particular when the conduit 121 is used as a supply line for a withdrawal of the ink or ink from the receiving space 111.
  • the first tank part 110 is assigned to the static pressure system part 8, ie the first tank part 110 is immovable indirectly or directly opposite the machine frame 9 held.
  • the second tank part 120 is associated with the moving printing system part 10 and thus carries out the movement of the print head 3, in particular the rotary movement of the rotor 4, to which the print head 3 is arranged.
  • the second tank part 120 is mechanically coupled to the rotor 4, so that the movement of the rotor 4 is transmitted by this mechanical coupling to the second tank part 120.
  • the mechanical coupling can take place by means of the at least one line 121 or by other or additional coupling means 140.
  • the movement of the second tank part 120 can advantageously be used for mixing the ink or ink contained in the receiving space 111.
  • 121 may be provided, for example, on the at least one line 121 not shown Studhrabête that set the ink or ink during movement of the second tank part 120 in motion.
  • the stirring sections can be formed, for example, by laterally projecting surface sections, for example wing-like surface sections. This prevents sedimentation or separation of the liquid constituents without the provision of a separate circulation device.
  • a seal is provided which, despite the relative movement of the second tank part 120 relative to the first tank part 110 causes a fluid-tight seal of the receiving space 111.
  • This seal can be formed for example by an O-ring of a flexible material, in particular rubber or of a sliding seal containing graphite or ceramic.
  • the seal is formed by a so-called. Gap seal or labyrinth seal, as for example in FIG. 4 is shown in more detail.
  • the conversion section 110a may have a notch or a trench 110b.1 in the region of its free end, which is opposite the second tank part 120, which is provided on the front side and on both sides of remaining webs of the conversion section 110b is limited.
  • the second tank part 120 may have a web 122 which interacts with the trench 110b.1 or engages in this trench 110b.1 and which is provided peripherally on the underside of the second tank part 120.
  • the trench 110b.1 or the web 122 in this case run rotationally symmetrical to the central vertical axis MHA of the first tank part 110 or of the second tank part.
  • the material thickness of the web 122 is less than the width of the trench 110b.1, so that upon engagement of the web 122 in the trench 110b.1 remains a gap on both sides.
  • This gap may preferably be filled with a fluid, for example a solvent similar to the printing ink or ink received in the receiving space 111 or a pigment-free base fluid which forms the basis for the printing ink or ink used.
  • the upper part of the accommodating space 111 not occupied by the ink can be pressurized to a pressure slightly above atmospheric pressure with a gaseous medium such as an inert gas, so that a purge air flow in the gap between the wall portion 110b and the second tank part 120 is created.
  • a sealing lip 123 for example a sealing lip 123 made of rubber, can be provided on the outer peripheral side in the transition region between the first and second tank parts 110, 120, which spans the gap remaining between the first and second tank parts 110, 120 , In order for an undesired exit of the liquid received in the gap of the labyrinth seal liquid can be prevented or minimized.
  • the sealing lip can minimize the escape of sealing air.
  • the second tank part 120 is arranged adjustable in height relative to the first tank part 110, that is, the distance between the first and second tank part 110, 120 is variably formed.
  • the height adjustment can be achieved in particular by length-adjustable coupling elements 140 by means of which the second tank part 120 is held relative to the rotor 4.
  • Fig. 5 another embodiment of a main tank 100 is shown. In the following, only the differences from the previously described embodiment will be explained. Incidentally, the above explanations also apply to this and the following exemplary embodiments ( Fig. 6 and 7 ).
  • the first tank part 110 is annular, in particular annular. Apart from the supply line 110c, the first tank part 110 thus has a rotationally symmetrical structure with respect to the central vertical axis MHA.
  • the receiving space 111 itself has an annular or annular shape, that is, the receiving space 111 is also rotationally symmetrical with respect to the central vertical axis MHA. Due to the ring-like structure of the first tank part 110, a concentric opening 114 is formed in this first tank part 110, which extends coaxially with the central vertical axis MHA.
  • the second tank part 120 also has an opening 124, so that the second tank part 120 is annular or annular.
  • the opening 124 is preferably likewise provided concentrically on the second tank part 120, specifically in such a way that, when the second tank part 120 is arranged on the first tank part 110 through the openings 114, 124, a continuous opening is formed through the main tank 100.
  • the openings 114, 124 may be used to pass other lines, for example electrical lines or fluid lines, between the static pressure system part 8 and the moving pressure system part 10 become.
  • drive means in the region of the opening 114, in particular drive means for driving the rotor 4 of the printing device 1.
  • FIG. 5 In the embodiment in FIG. 5 is on the line 121 on top of a ring-shaped manifold 130 is provided.
  • This coronal manifold can For example, have a tubular ring 130.1, in which the upper free end 121.2 of the line 121 opens, in such a way that the interior of the ring 130.1 is fluid-tightly connected to the interior of the conduit 121.
  • a plurality of branching points 130.2 may be formed on the ring 131.1, which are formed, for example, by pipes 130.3 opening into the interior of the ring 130.1.
  • the respective printheads 3 can be supplied with the ink or ink.
  • FIG. 6 shows in a modification of the embodiment described above according to FIG. 5 likewise a ring-shaped, in particular annular, main tank 100 with an annular or circular-shaped first and second tank part 110, 120.
  • the first tank part 110 has several chambers 112, 113, so that a plurality of receiving spaces 111, 111 'are formed in the first tank part 110 , which are fluid-tightly separated from each other by an intermediate conversion 115.
  • the chambers 112, 113 are concentric with each other, particularly such that the chamber 112 forms an inner chamber and the chamber 113 forms an outer chamber surrounding the inner chamber 112 circumferentially. It is understood that in deviation from the embodiment shown embodiments with more than two chambers 112, 113 are possible.
  • the second tank part 120 has at least two lines 121, the lines 121 being arranged on the cover section 120.1 in such a way that a first line extends into the chamber 112 and a second line into the chamber 113.
  • the lines 121 are arranged on the cover section 120.1 in such a way that a first line extends into the chamber 112 and a second line into the chamber 113.
  • FIG. 7 shows a further variant of the main tank 100, in which, in a modification to the embodiment described above according to FIG. 6 a plurality of conduits 121 are provided, with a first portion of conduits extending into the chamber 112 and a second portion of conduits extending into the chamber 113. Through the lines 121 individual outlets for each printhead 3 are formed.
  • the moving printing system part 10 includes, inter alia, two auxiliary or auxiliary tanks 23 and 24, of which the auxiliary tank 23 serves as a tank 23 or as a source for the printing heads 3 supplied ink or ink and of which the auxiliary tank 24 as Austank or as a sink for receiving the printing is not required, the print heads 3 flows through the ink used.
  • the two auxiliary tanks 23 and 24 are each annular and centrally, ie provided coaxially with the machine axis MA and in the vertical direction one above the other on the rotor 4, namely the auxiliary tank 23 above the auxiliary tank 24.
  • the individual print heads 3 to the auxiliary tanks 23 and 24th arranged distributed.
  • the supply line 21 opens via the valve 22 into the auxiliary tank 23.
  • the auxiliary tank 23 is connected in each case via a line 25 to an inlet serving as the inlet of the respective print head 3.
  • a serving as an outlet port of each printhead 3 is connected via a line 26 with pressure reducer 27 to a multi-way valve 28, via which either a connection of the line 26 to the auxiliary tank 24, a connection between the auxiliary tank 24 and the line 21 or the line 19th or a connection between the line 26 and the line 21 or with the line 19 is possible.
  • the valve 28 is controlled so that there is a connection between the conduit 26 and the auxiliary tank 24 via this valve.
  • the two auxiliary tanks 23 and 24 continue to be identical.
  • Each auxiliary tank 23 and 24 has means with which the pressure in the auxiliary tank 23 and 24, which is partially filled during the printing operation in each case with the ink, and
  • the pressure in the lines 25 and 26 and thus at the terminals of the print heads 3 is set exactly so that the pressure P23 in the auxiliary tank 23 is slightly larger than the pressure P24 in the auxiliary tank 24, but the pressure P23, for example, is slightly smaller as the atmospheric pressure.
  • the pressure control is achieved on the one hand, that the print heads 3 are flowed through during the printing operation of the ink, that is not required for the printing amount of each printhead 3 via the line 25 supplied ink the print head 3 is discharged through the line 26 is discharged.
  • the volume flow of the ink to each print head 3 from the auxiliary tank 23 and from each print head 3 to the auxiliary tank 24 can be adjusted by appropriate selection of the pressures P23 and P24.
  • auxiliary tanks 23 and 24 are centrally located on the rotor 4 and the printing heads 3 are respectively around the auxiliary tanks 23 and 24 in the same radial Provided distance from these auxiliary tanks, but also leading to the printheads 3 and individually provided for each print head 3 lines 25 and 26 are routed to the rotor 4 for each print head 3 in the same way, for example, such that these lines radially or substantially radially to the vertical machine axis MA run.
  • the auxiliary tanks 23 and 24 are further equipped with means which ensure an exact filling level of the printing ink in each auxiliary tank 23 or 24 during operation of the printing device 1.
  • these means are formed by the fact that inside each annularly shaped auxiliary tanks 23 and 24, an annular barrier or overflow 29 is provided which concentrically surrounds the machine axis and the serving for receiving the ink tank interior 23.1 and 24.1 of a likewise in each auxiliary tank 23 and 24 formed annular collecting space 23.2 and 24.2 separates, which serves to collect excess ink.
  • the collection rooms 23.2 or 24.2 are provided on the inside, ie enclosed by the associated tank interior 23.1 or 24.1.
  • the printing system is operated so that in each auxiliary tank 23 and 24 constantly a certain flow of ink from the tank interior 23.1 and 24.1 via the overflow 29 in the associated plenum 23.1 and 24.1 flows.
  • the plenums 23.2 and 24.2 are connected to the main tank 100 in connection, in the illustrated embodiment such that the plenum 23.2 is connected via a line 30 and a pressure reducer, not shown, with the plenum 24.2 and the latter via a line 31 and a control valve 34 is connected to the main tank 100.
  • the printing system continues to be controlled, and so on. by appropriate control of the pump 15, the valves 18, 22 and 34 that not only the main tank 100 filling level or level control is partially filled with the ink, i. Ink is refilled from the cartridge 17 connected to the refill valve via this refill valve, the pump 15, the degasser 13, the filter 14 and the valve 18 into the main tank 100 when the ink level in the main tank 100 falls below a predetermined level, but the system is also operated so that each plenum 23.2 and 24.2 level or filling height controlled is filled with ink.
  • both the main tank 11, as well as to the collecting spaces 23.2 and 24.2 level sensors 35 (main tank 11) and 36 (plenums 23.2 and 24.2) are provided.
  • each tank is provided with a drain valve 32, via which the tank interior 23.1 or 24.1 connected to the outlet of the associated plenum 23.2 or 24.2 or the corresponding line 30 and 31 respectively can be, but which is closed during normal operation of the printing device.
  • the ink circulates in the printing system 5 in two circuits, in which the pump 15, the degasser 13, the filter 14 and the main tank 100 enclosing the first ink circuit of the static or stationary part 8 and in a second ink cycle, which includes the static part 8 and the rotating part 10 of the printing system and also the print head 3.
  • both ink circuits include the main controlled-temperature tank 100, the degasser 13, and the filter 14, so that the ink in these ink circuits is constantly conditioned, i. et al is maintained at a quality and temperature level required for optimal printing.
  • the control of the printing device 1 or the printing system 5 of this machine can be carried out so that during the printing operation both ink circuits are simultaneously flowed through by the ink.
  • the lines 30 and 31 and their connections are each arranged coaxially with the machine axis MA.
  • FIG. 9 shows in a representation comparable to FIG. 8 a further embodiment of the printing system according to the invention.
  • the main tank 100 there is an annular design of the main tank 100 use, which has a plurality of lines 121 for supplying ink or ink.
  • the lines 121 are connected to the tank 23 through which the ink or ink is supplied to the printheads 3.
  • a return line 40 is provided, which leads from the Austank 24 to the main tank 100 and allows a return flow of the ink or ink, in particular for treatment purposes.
  • FIG. 9 For mechanical coupling of the second tank part 120 with the rotor 4 are in FIG. 9 schematically shown coupling means 140 are provided which connect the second tank part 120 with the rotor 4, so that upon rotation of the rotor 4, the second tank part 120 is simultaneously moved.
  • an inert gas feed line 39 can be provided, by means of which an inert gas can be fed into the receiving space 111 of the main tank 100.
  • This inert gas can be used, for example, to generate a barrier air flow is, which exits through a gap provided between the first and second tank part 110, 120 and thereby prevents entry of undesirable substances into the receiving space 111.
  • FIG. 10 shows a further embodiment of the pressure system according to the invention 5.
  • the main tank 100 a tank is used with a plurality of chambers, as previously with respect to FIG. 7 has been described.
  • the main tank 100 has two chambers 112, 113, wherein the chamber 113, which runs around the outside of the chamber 112, forms a flow chamber in which conditioned or tempered printing ink or ink is stored.
  • the extending into this chamber 113 lines 121 form supply lines for supplying the print heads 3 with ink or ink.
  • the extending into the chamber 112 lines 121 form return lines in which reprocessed ink or ink in the chamber 112 is traceable.
  • the chamber 112 may be connected via a drain 116 to a reprocessing device 50 in which, for example, the printing ink or ink is degassed, filtered and subjected to other processing steps.
  • Tempering means 68 can be provided in the discharge line, which effect, in particular, a cooling of the printing ink or ink.
  • the reclaimer 50 is also connected via a feed line 110c to the chamber 113 containing the reclaimed ink. Tempering means 68, by means of which, in particular, heating of the printing ink or ink is possible, can likewise be integrated into this feed line 110c.
  • coupling means 140 are provided, which firmly connect the second tank part 120 with the rotor 4, so that upon rotation of the rotor 4, the second tank part 120 is simultaneously moved.
  • These coupling means 140 are designed to be adjustable in height, so that a height-adjustable suspension of the second tank part 120 relative to the rotor 4 is effected.
  • each print head 3 is preferably associated with a pair of pulsation dampers 41, 42, namely a pulsation damper 41 in the direction of flow of the ink or ink in front of the print head 3 and another pulsation damper 42 in the direction of flow of the ink or ink after the print head 3
  • the pulsation dampers 41, 42 each form a storage space for the ink or ink, which is considerably smaller than the receiving space of the auxiliary tanks 23, 24.
  • the pulsation damper 41, 42 contain a membrane, the interior of the pulsation damper in one of the ink or ink flows through subspace and another subspace separates in which a gas is included.
  • a filter 43 provided in the ink feed, can be filtered with the particles larger than a defined particle size from the ink or ink.
  • FIG. 11 shows in a presentation like FIG. 2 an alternative printing system 5a of a printing device.
  • the printing system 5a again consists of the stationary part 8a and the rotating part 10a, wherein the stationary part 8a with the stationary part 8 of the printing system 5 of FIG. 2 is identical.
  • the rotating part 10a has on the rotatable about a vertical machine axis MA rotatably rotatable rotor digitally controllable printheads 3a, which operate in the same way as the printheads 3 by the ink-jet or ink jet principle and in each case a plurality of nozzles 3a.1 for controlled application of the ink (nozzles) in a vertical axis direction, that are provided in succession in an axial direction parallel to the machine axis MA.
  • the printheads 3a are formed as printheads with static ink or ink supply, ie as so-called “end shooter printheads", each having only one port through which the ink at a predetermined pressure, for example, with a slight negative pressure or excess pressure is supplied.
  • the rotating part 10a of the printing system again has the two auxiliary tanks 23 and 24, although only the auxiliary tank 23 or its tank interior 23.1 is connected to the single input of each print head 3a via a respective line 25 and an additional multiway valve 37 provided in this line , To the valve 37 and the line 26 is connected to the pressure reducer 27, which is connected directly to the line 21 to the line 19 in this embodiment.
  • the auxiliary tank 24 is not used in this embodiment as a sink for receiving ink that has been returned by printheads, but only the plenum 24.2 of the auxiliary tank 24 is to receive the excess ink from the plenum 23.2 and for deriving this ink to the main tank 100 of the static Part 8a used.
  • the pressure system 5a also two ink circuits are possible, namely a first circuit within the static part 8a, which in turn includes the pump 15, the degasser 13, the filter 14 and the main tank 100 and a second ink circuit, the static 8a and the includes rotating part 10a.
  • This second ink cycle then extends, for example, starting from the tank interior 23.1 of the auxiliary tank 23 via the local overflow 19 into the collecting space 23.2, from there into the collecting space 24.2, from there into the main tank 100 and from there via the pump 15, the degasser 13, the filter 14 and the lines 19 and 21 back to the auxiliary tank 23 and to the local tank interior 23.1.
  • the printing ink is constantly conditioned, not only in the first ink circuit running solely on the static part 8a, but also in the second circuit which encloses both the static part 8a and the rotating part 10a of the printing system 5a degassed, filtered and tempered, ie the respective requirements either heated or cooled.
  • FIG. 12 shows FIG. 12 in a perspective view of a tank assembly 38 which forms the two individual tanks 23a and 24a, which in turn are annular, the machine axis MA concentrically enclosing executed, but not deviated from the above embodiment not offset in the direction of the machine axis MA against each other, but are arranged in the manner in that a single tank, for example the auxiliary tank 23a, surrounds the auxiliary tank 24a in an annular manner.
  • the auxiliary tanks 23a and 24a are again in a tank interior 23a.1 or 24a.1 and a collecting space 23a.2 or 24a.2.
  • FIG. 13 shows in a very simplified representation again the rotating part 10b of the printing heads 3 having printing system 5b, together with the centrally arranged and in the direction of the machine axis MA staggered auxiliary tanks 23b and 24b, of which the auxiliary tank 23b turn the ink source (source) or the Eintank for the printheads 3 and the auxiliary tank 24b, the ink reservoir (drain) and the Austank for the printheads 3 form. Only two printheads 3 are shown. In fact, the printing system has a plurality of printheads 3.
  • the two auxiliary tanks 23b and 24b are arranged centrically with respect to the machine axis MA and rotationally symmetrical about this machine axis MA, that is circular cylindrical, the two auxiliary tanks 23b and 24b do not have the overflow 29 and the collecting space formed thereby. It is clearly shown in the FIG. 6 the generated by the rotational movement of the rotor parabolic course of the ink level (convex meniscus).
  • Changing pressure conditions due to a changing rotational speed of the rotor are adjusted by controlling the pressures P23b and P24b in the auxiliary tanks 23b and 24b and the differential pressure between these auxiliary tanks or compensated, so that a constant flow rate of the ink through the printheads 3 and a constant pressure, for example, a constant or stable negative pressure (meniscus negative pressure) is reached at the nozzles 3.1 of the printheads 3.
  • a constant or stable negative pressure meniscus negative pressure
  • the respective printing apparatus 1 comprises a printing system 5, 5a or 5b which is capable of printing the containers 2 with a single ink or ink, i. with the ink or ink of a single color allows.
  • a plurality of printing devices 1 are then sequentially provided in a system, wherein in each printing device then a color set of the respective multi-color print is generated.
  • the printing positions are 4.1 for aligning the respective container 2 formed on a container or applied mark before the actual start of printing, so as to ensure the correct position applying the individual, the multi-color printing forming color sets.
  • Fig. 14 shows a printhead 3, which operates on the so-called "end-shooter” principle.
  • this type of printhead 3 there is no ink circuit in which the printhead is integrated, as for example in the previously described embodiments according to Fig. 2 . 8th . 9 . 10 and 13 the case is, but the ink or ink is continuously under pressure at the print head and can emerge from the print head alone via the nozzles 3.1. Therefore, there is no cross flow of Printing ink through a rear chamber of the print heads 3 possible, ie no transverse to the individual channels in the respective nozzles 3.1 running flow.
  • a tank 60 containing a cleaning fluid The cleaning fluid can be formed by a solvent or a printing ink-forming ink base fluid without pigments and without UV-reactive components (inhibitors).
  • the receiving space of the tank 60 is fluidly connected via a line 61 to the at least one print head 3, preferably to all print heads 3 of the printing system 5.
  • a pump 62 and a multi-way valve 63 is preferably integrated via which instead of the cleaning fluid, a gaseous medium in the conduit 61 can be introduced.
  • a cap 64 is arranged in front of the print head 3, which preferably covers the entire exit area, at which the cleaning fluid discharged from the print head 3 exits.
  • the cap 64 is fluidly connected to the tank 60 by means of a return line 67, in which preferably a filter unit 65 and further preferably a pump 66 is integrated.
  • a treatment unit for the treatment of the cleaning fluid can be provided in the circuit.
  • the tank 60 can in this case be formed by a separate tank, which is preferably arranged in the static pressure system part 8.
  • the tank 60 may be integrated into the main tank 100, in particular such that a chamber 112, 113 of the main tank 100 is provided for receiving the cleaning fluid.
  • the cleaning process can be performed either with a fixed rotor 4, so that a fixed connection to be made for the cleaning process between the static pressure system part 8 and the moving pressure system part 10 is possible.
  • a separate rotary distributor may be used to establish communication between the static pressure system part 8 and the moving pressure system part 10. In the case where the tank 60 is integrated with the main tank 100, a separate rotary distributor is not needed because the coupling of the moving pressure system part 10 to the static pressure system part 8 is effected by the main tank 100 with the second tank part 120 being moved.
  • the invention also includes a very advantageous method, namely the printing inks, which tend to segregate, very easy and effective to circulate and keep in motion by the contents of the tanks 100 through the free ends of the extraction lines 121, the in extend the standing tank part 110 into it and move along with the rotating tank part 120, are permanently stirred and mixed.
  • a buffer gas esp. An inert or sterile gas can be passed into the headspace of the tank 100, preferably via a passage in the wall of the stationary Tank part 110 is done.
  • the rotating part 10, 10a, 10b of the printing system is located above the static part 8, 8a of the printing system.
  • the rotor 4 which initially holds the transport element for the containers 2, i. forms the container conveyor, and the print heads 3 and 3a are provided, so the rotor 4 at the same time also the printheads 3 and 3a moving transport element.
  • the print heads 3 and 3a are each provided with at least one color or a color set of a multicolor print on a separate transport element (print head transport element) moved or rotated about the vertical machine axis MA.
  • the regulation of the pressures P23 and P24 is effected, for example, also as a function of the rotational speed and / or acceleration of the rotor 4 in such a way that centrifugal forces exerted on the ink or ink by the pressure control are compensated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ink Jet (AREA)
  • Coating Apparatus (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP14753083.6A 2013-09-13 2014-08-20 Drucksystem und druckvorrichtung für flaschen oder behälter mit mehrteiligem versorgungstank sowie verfahren Not-in-force EP3044001B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013110108.9A DE102013110108A1 (de) 2013-09-13 2013-09-13 Drucksystem zum Bedrucken von Flaschen oder dergleichen Behältern sowie Druckvorrichtung oder –maschine mit einem solchen Drucksystem
PCT/EP2014/067784 WO2015036215A1 (de) 2013-09-13 2014-08-20 Drucksystem und druckvorrichtung für flaschen oder behälter mit mehrteiligem versorgungstank sowie verfahren

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EP3044001A1 EP3044001A1 (de) 2016-07-20
EP3044001B1 true EP3044001B1 (de) 2017-10-04

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US (1) US9630414B2 (ja)
EP (1) EP3044001B1 (ja)
JP (1) JP6421189B2 (ja)
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DE102014110520A1 (de) 2014-07-25 2016-01-28 Krones Ag Direktdruckmaschine mit Tintenversorgungssystem
DE102017215475A1 (de) * 2017-09-04 2019-03-07 Krones Ag Direktdruckmaschine und -verfahren zur Bedruckung von Behältern mit einem Direktdruck
JP7037433B2 (ja) * 2017-11-29 2022-03-16 株式会社ミマキエンジニアリング インクジェット記録装置
DE102018109083A1 (de) * 2018-04-17 2019-10-17 Khs Gmbh Vorrichtung zum Direktbedrucken von Behältern
DE102018111367A1 (de) * 2018-05-14 2019-11-14 Khs Gmbh Vorrichtung und Verfahren zum Bedrucken von Behältern
DE102018007916A1 (de) * 2018-10-08 2020-04-09 Jan Franck Zirkulationsvorrichtung für ein flüssiges Stoffgemisch in einem Behälter
KR102668889B1 (ko) 2018-12-24 2024-05-24 삼성디스플레이 주식회사 잉크젯 프린팅 장치, 잉크 분사 방법 및 표시 장치의 제조 방법
DE102022122252A1 (de) 2022-09-02 2024-03-07 Dekron Gmbh Tintenversorgungssystem und Tintenversorgungsverfahren für den Digitaldruck

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ITBO20020633A1 (it) * 2002-10-08 2004-04-09 Azionaria Costruzioni Acma Spa Metodo e macchina per l'erogazione di sostanze fluide all'interno di contenitori
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WO2015036215A1 (de) 2015-03-19
US9630414B2 (en) 2017-04-25
US20160221346A1 (en) 2016-08-04
EP3044001A1 (de) 2016-07-20
JP2016536175A (ja) 2016-11-24
DE102013110108A1 (de) 2015-03-19
JP6421189B2 (ja) 2018-11-07

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