EP3529082B1 - Procédé permettant de faire fonctionner un dispositif d'impression et dispositif d'impression - Google Patents

Procédé permettant de faire fonctionner un dispositif d'impression et dispositif d'impression Download PDF

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Publication number
EP3529082B1
EP3529082B1 EP17793603.6A EP17793603A EP3529082B1 EP 3529082 B1 EP3529082 B1 EP 3529082B1 EP 17793603 A EP17793603 A EP 17793603A EP 3529082 B1 EP3529082 B1 EP 3529082B1
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EP
European Patent Office
Prior art keywords
fluid
print head
contamination
purification circuit
purification
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17793603.6A
Other languages
German (de)
English (en)
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EP3529082A1 (fr
Inventor
Leticia Garcia Diez
Edgar Boehm
Volker Hilarius
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.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
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Filing date
Publication date
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Publication of EP3529082A1 publication Critical patent/EP3529082A1/fr
Application granted granted Critical
Publication of EP3529082B1 publication Critical patent/EP3529082B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • 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
    • B41J2/20—Ink jet characterised by ink handling for preventing or detecting contamination of compounds
    • 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
    • B41J2/17563—Ink filters
    • 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
    • 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
    • B41J2/185—Ink-collectors; Ink-catchers
    • 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
    • B41J2/19—Ink jet characterised by ink handling for removing air bubbles
    • 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
    • B41J2/195—Ink jet characterised by ink handling for monitoring ink quality

Definitions

  • the present invention relates to a method for operating a printing device, wherein a fluid intended for a printing process is fed from a fluid storage container via a feed line to a print head in order to be able to be applied by the print head to a surface.
  • organic semiconductor materials have been developed in recent years, which are suitable, for example, for the production of organic semiconductor components and in particular for the production of organic light-emitting diodes and corresponding displays.
  • Various printing technologies are suitable for processing the organic semiconductor materials, among other things, with which the organic semiconductor materials dissolved in a suitable solvent can be applied to a predetermined surface.
  • large-area displays which are composed of a very large number of independently controllable organic light-emitting diodes (OLEDs) made of organic semiconductor materials, can be printed with inkjet printing devices known from practice.
  • the currently known printing technologies enable components and in particular displays made of organic semiconductor materials to be manufactured quickly and in terms of the process sequence.
  • an almost unavoidable contamination of the dissolved organic semiconductor materials with particles and dissolved gases is of particular importance for the product quality of the components and displays.
  • contamination with foreign particles can hardly be avoided.
  • the one in the Organic semiconductor materials dissolved in solvents also have a high sensitivity to the ambient air and also to moisture, so that the organic semiconductor materials can absorb a product-endangering amount of gases or moisture even after brief contact with the ambient air.
  • the semiconductor materials dissolved in a suitable organic solvent are usually cleaned, filtered and degassed in a multi-stage cleaning process.
  • the cleaned fluid from the dissolved organic semiconductor material is then filled into transport containers and brought from the manufacturing site of the organic semiconductor materials to a manufacturing site for the respective components or displays, for the manufacture of which the organic semiconductor material is required.
  • the transport containers are also cleaned before filling with the organic semiconductor material in order to keep the contamination of the fluid filled and transported in the transport containers as low as possible.
  • DE102014017223 discloses a method according to the preamble of claim 1.
  • the fluid can be circulated and cleaned several times in the cleaning circuit before the printing process begins. With each cleaning cycle, the fluid is conveyed and cleaned by the cleaning device.
  • the cleaning methods known from practice, such as filtering or degassing have an average or maximum cleaning efficiency, depending on the principle and depending on the respective implementation, so that a corresponding proportion of impurities can be separated and removed from the fluid during a cleaning step.
  • a cleaning device which includes, for example, a filter device or a degassing device, it is still not possible to achieve or guarantee sufficient purity of the fluid.
  • the cleaning device can also have, for example, several filter devices and several degassing devices.
  • Several filter devices or degassing devices can, for example, be arranged in a cascade and designed with increasing separation criteria. Nevertheless, the cleaning effect is limited when there is a single flow through a cleaning device comprising several components.
  • the contamination parameter can be continuous, regular or predetermined time intervals or only when needed or after a request from a user.
  • the contamination parameter can consist of a single contamination parameter or it can be composed of several contamination parameters, each of which is recorded and related to one another.
  • the contamination parameters can include, for example, a number of particles, which may differ according to particle size, or a gas content.
  • the effort to determine the contamination parameter is usually low.
  • the first threshold value can be predetermined as a function of the contamination parameters which are considered relevant in the individual case or can allow different weighting of individual contamination parameters.
  • the impurity content or the purity of the fluid supplied to the printing device can be determined before a single printing process is started.
  • the method according to the invention can be used without any noteworthy Additional effort is required to check the content of each individual fluid reservoir and to check the contaminant content of the fluid supplied to the print head before printing begins.
  • a portion of the fluid already removed from the fluid storage container can be returned to the after a cleaning cycle Fluid storage containers are returned in order to subsequently remove a more cleaned fluid portion from the fluid storage container and feed it to the print head.
  • the contamination measurement device can be used to determine the contamination parameter continuously, at time intervals or only after a predetermined number of cleaning cycles.
  • the contamination measuring device can also include several separate measuring devices such as, for example, one or more particle counters and a gas content measuring device or several measuring devices for different gas contents.
  • the printing process is then only started when the contamination parameter measured with the contamination measurement device falls below the first threshold value, which is predetermined such that the desired purity of the fluid removed from the fluid storage container can be achieved and guaranteed with sufficient reliability.
  • the requirements for the purity of the fluid during manufacture and during transport to the printing device can be considerably reduced, since the fluid is cleaned again in the printing device until the purity desired for the printing process in question is achieved.
  • the procurement of the fluid is thereby considerably more cost-effective compared to complex cleaning operations during manufacture and before transport to the printing device, if cleaning would then no longer be carried out.
  • the method according to the invention can advantageously be used for printing processes with the same or different fluids, for which the purity of the fluid or as little contamination of the fluid as possible are relevant and for different printing processes different requirements with regard to purity are to be met.
  • the required purity can be achieved and guaranteed by the appropriate specification of threshold values.
  • An important area of application of the method according to the invention relates to organic semiconductor materials which are filled into a fluid reservoir in solution or as part of a liquid ink material in order to be able to be used for the production of an organic semiconductor component.
  • the fluids in question can also be filled into a transport container during or immediately after production, in order to be removed from the transport container again at the intended use location and transferred to a fluid storage container. It is also conceivable that the transport container is used as a fluid reservoir.
  • the organic semiconductor material can be used, for example, for the production of OLEDs and in particular OLED displays.
  • other fluids can also be used in an advantageous manner with the method according to the invention for printing on surfaces, the fluids containing, for example, functional components or dissolved components, for the function or effect of which, after their application, it is necessary for the fluid to have predetermined threshold values for a the maximum permissible contamination if possible.
  • the fluid sample quantity is branched off from the cleaning circuit, fed to the contamination measuring device and, after the determination of the contamination parameter, is fed back into the cleaning circuit in order not to limit the circulation of the fluid in the cleaning circuit by a residence time of the fluid in the contamination measuring device which is necessary for carrying out a measurement.
  • the fluid can circulate in the cleaning circuit at a high flow rate, which is possibly limited by a maximum flow rate specified by the cleaning device.
  • the amount of fluid sample branched off from the cleaning circuit and fed to the contamination measuring device can remain there independently of the flow rate specified in the cleaning circuit in order to enable sufficiently precise and precise measurements. It is assumed that the fluid circulating in the cleaning circuit is sufficiently mixed and homogeneous, so that the contamination parameter determined from the amount of fluid sample is characteristic of the contamination of the fluid circulating in the cleaning circuit.
  • the print head has a return line into the cleaning circuit and that a quantity of print head cleaning fluid conveyed into the print head is removed from the print head and returned to the cleaning circuit. It has been shown that the contamination of the fluid during a printing process is not caused exclusively by contamination of the fluid that is unavoidable until the supply of the fluid, but that contamination of the printhead which has not yet been used can also contribute a noticeable proportion to the contamination of the fluid .
  • the printhead can be contaminated during long downtimes or from a previous printing process. Separate cleaning of the printhead is time-consuming and costly.
  • the printhead can be integrated into the cleaning circuit and the fluid can flow through it, so that contaminants in the printhead can be absorbed by the fluid and filtered out during a subsequent flow through the cleaning device into the cleaning circuit.
  • a particularly reliable monitoring and specification of the purity of the fluid provided for the printing process can be achieved in that the contamination measuring device determines a contamination parameter of the amount of print head cleaning fluid returned from the print head and that the printing process with the print head is only started after the contamination parameter has reached a second threshold value falls below. In this way it can be ensured that not only the fluid removed from the fluid storage device, but also the fluid through which the print head flows, has a predetermined purity, so that no additional excessive contamination can be generated by the print head during a printing process.
  • the contamination measuring device integrated in the cleaning circuit not only the degree of contamination or degree of purity of the fluid after removal from the fluid reservoir, but also the degree of purity of the fluid that has already flowed through the printhead can thus be recorded or monitored and thereby also specified.
  • the degree of purity determined after flowing through the printhead generally also corresponds to the degree of purity that a user of the fluid finds while printing on electronic components or displays, provided that there is no subsequent contamination of the fluid during the renewed flow through the cleaning circuit, the feed line and the printhead . This can be largely prevented by a suitable design of the printing device.
  • the second threshold value can be higher than the first threshold value because of possible uncertainties subsequent contamination has already been significantly reduced.
  • the invention provides that the fluid first have a few cleaning cycles in the cleaning circuit passes through and is then fed to the print head only after a contamination parameter, determined in the fluid cleaning step, of the fluid conveyed in the cleaning circuit falls below a third threshold value.
  • the fluid intended for a printing process can initially circulate in the cleaning circuit until a contamination parameter has dropped to, for example, one tenth or one hundredth of the original value.
  • the printhead can then be integrated in the cleaning circuit and the circulating fluid flows through it in order to discharge the contaminants present in the printhead.
  • the fluid continues to circulate in the cleaning circuit until the contamination parameter has dropped further to, for example, one percent or one per thousand of the original value and sufficient purity of the fluid circulating in the cleaning circuit and through the printhead is confirmed.
  • the fluid in the fluid cleaning step the fluid is conveyed through at least one particle filter and a degassing device.
  • a combination of a particle filter and a degassing device is particularly expedient and advantageous when filling organic semiconductor materials, the subsequent use of which can be impaired and restricted both by particle contaminants and by gaseous contaminants.
  • several particle filters with matching filter properties are combined to increase the efficiency of the cleaning device.
  • Several particle filters with different filter properties or different filter classes can also be combined and, for example, two or three particle filters can be arranged one after the other, which can filter out increasingly smaller particle diameters.
  • a combination of several degassing devices can also be useful, for example to filter out different gases or to increase the efficiency of the degassing in one pass through the cleaning device.
  • the contamination parameter is composed of a particle content parameter and a gas content parameter, which are recorded in each case with the contamination measuring device.
  • contamination by particles and by a gas content can be checked independently of one another and can be used and taken into account via suitable threshold values for the sequence and the control of the method according to the invention.
  • several particle content parameters are recorded at the same time and taken into account for the process sequence, so that, for example, the respective particle content of the fluid to be filled is monitored for different areas of particle diameters and the cleaning of the fluid is continued until the respectively specified areas of the particle diameter are given Thresholds are fallen short of or are reached or maintained.
  • the invention also relates to a printing device with a printhead and with a connection device for a fluid reservoir, which is connected to the printhead via a feed line, so that the fluid can be fed from the fluid reservoir to the printhead and applied to a surface by the printhead.
  • connection device has a fluid removal device and a fluid refilling device for the fluid storage container
  • the pressure device has a cleaning circuit formed from fluid line sections with a cleaning device and with a contamination measuring device, in which the fluid removed from the fluid storage container via the fluid removal device is cleaned, a contamination parameter of a fluid sample quantity in determined the cleaning circuit and the fluid can be returned to the fluid reservoir via the fluid refilling device, and that the supply line branches off from the cleaning circuit and connects the cleaning circuit to the print head, so that the fluid flowing through the cleaning circuit can be supplied to the print head.
  • the fluid provided for a subsequent printing process can be circulated in a cleaning circuit in a simple manner and can thus be guided several times through the cleaning device arranged in the cleaning circuit. At the same time, an already achieved cleaning effect can be checked with the contamination measuring device. After sufficient cleaning of the fluid in the cleaning circuit, the printing process can be started.
  • a return line connects the printhead to the cleaning circuit so that the fluid supplied to the printhead can flow through the printhead and be fed back to the cleaning circuit.
  • the printhead can be integrated into the cleaning circuit, so that the fluid circulating in the cleaning circuit can also be passed through the printhead. This allows contaminants in the printhead to be absorbed by the fluid and removed from the printhead. In this way, additional cleaning of the printhead and the feed line can be carried out without any significant additional effort in order to contaminate the Avoid fluids intended for the printing process due to contamination in these areas.
  • supply lines to individual printhead nozzles as well as storage chambers or other components of the printhead can be flowed through and cleaned, or the fluid can be fed to the printhead and then fed to the return line without flowing through individual components of the printhead. It is also possible for the fluid to be guided past the printhead via a bypass line connecting the return line to the supply line.
  • the printhead can either be fully integrated into the cleaning circuit and flowed through by the entire amount of fluid circulated in the cleaning circuit. It is also conceivable that the printhead is connected to the cleaning circuit via a bypass line and only a predetermined portion of the fluid circulating in the cleaning circuit flows through it.
  • connection device expediently has the line sections necessary for the connection to the fluid storage container, which are combined and brought together in a coupling, a connection adapter or a connecting plug in order to facilitate a quick, reliable and tight connection to the fluid storage container.
  • the connection device of the cleaning circuit to the fluid storage container can be designed such that the entire amount of fluid specified in a fluid storage container can circulate continuously through the cleaning circuit. If required, a plurality of fluid storage containers can then be connected to the cleaning circuit in succession or, if appropriate, simultaneously, and their contents can be cleaned by the printing device according to the invention, for example to avoid a printing process, if possible, or only for a very short time to interrupt, which requires more fluid than can be stored in a fluid storage container. It is also possible that only the amount of fluid provided for a short printing process is fed into the cleaning circuit and cleaned there in order to enable the fluid amount provided for the printing process to be purified as quickly as possible.
  • the return line completely surrounds the feed line at least along one feed line section. This has the effect that the fluid conveyed back from the printhead to the fluid storage container flows around the fluid conveyed in the feed line to the printhead at least in sections.
  • Many organic semiconductor materials which are suitable, for example, for the production of large-area displays, can be inadvertently contaminated with oxygen that is absorbed from the environment or penetrates into the fluid.
  • many components of the printing device are designed and manufactured from suitable materials such as stainless steel in such a way that oxygen penetration or diffusion into the fluid is prevented as far as possible and is kept as low as possible.
  • the undesired penetration of oxygen into the fluid, which is conveyed through the supply line to the printhead, can be made more difficult and possibly largely avoided that the fluid returned to the fluid reservoir completely surrounds the supply line at least in sections, so that from the environment into the Oxygen penetrating fluid lines can essentially only penetrate into the return line and thus into the fluid conveyed back to the fluid storage container.
  • the return line which surrounds the supply line, forms an additional shield and the functional lock for the supply line surrounding the return line.
  • the return line again Returned fluid can be cleaned as a precaution or, if necessary, before being fed back to the printhead in order to reduce any contamination.
  • the fluid reservoir is arranged in a fixed distance from the surface and that the print head connected to the fluid reservoir via at least one line traversing section is moved via a flexible feed line and a flexible return line for printing over the surface.
  • the possibility of circulating the fluid in the cleaning circuit and thereby having it cleaned with the cleaning device integrated in the cleaning circuit enables a large distance between the fluid reservoir and the printhead, since any contamination within the printing device or in the cleaning circuit during the printing process can be reduced with the help of the cleaning device. It is not necessary to arrange the fluid reservoir directly on or on the print head and to move it together with the print head over the surface during the printing process.
  • the fluid reservoir can be arranged in a stationary manner at a distance from the surface to be printed.
  • connection of the fluid reservoir to the printhead is made possible via a flexible feed line and a flexible return line.
  • the flexible feed line is additionally shielded with the return line surrounding the feed line. Contamination of the fluid, which may be favored by a longer residence time in the feed line, can be reduced if necessary by conveying the fluid through the return line and through the cleaning device.
  • the spaced and fixedly arranged fluid storage containers can have a considerably larger capacity than storage containers which are arranged on or on a movable print head. A single printing process can be completed and completed much faster. With large-volume fluid storage containers, a large number of printing processes can be carried out before the fluid storage container has to be replaced.
  • the cleaning device expediently has at least one particle filter and a degassing device.
  • at least one first particle filter can be arranged in the direction of flow and at least one second particle filter to be arranged after the degassing device.
  • several particle filters are combined with a matching filter effect or with mesh sizes or pore diameters that become smaller in the direction of flow.
  • several identical or different degassing devices can also be combined with one another or used alternately with particle filters.
  • the contamination measuring device is expediently arranged in the flow direction after the cleaning device, so that the cleaning effect caused by the cleaning device can already be detected by the contamination measuring device.
  • the outlet of the return line is arranged upstream of the contamination measuring device in the flow direction.
  • a bypass line section is arranged in the cleaning circuit, in which the fluid can be conveyed through the contamination measuring device, so that only a predeterminable amount of fluid sample is conveyed by the contamination measuring device.
  • the measurement time required to detect a contamination parameter is considerably longer than the time required for the fluid to flow through the cleaning device and to be cleaned in the process.
  • Printing device 1 shown as an example has a cleaning circuit 2, which is composed of a plurality of fluid line sections 3, 4, 5.
  • the fluid line section 3 is connected to a fluid reservoir 6, for example holding 100 milliliters or 10 liters, in such a way that fluid located in the fluid reservoir 6 can be conveyed from the fluid reservoir 6 to a cleaning device 8 with a pump device 7.
  • the fluid can contain organic semiconductor materials, for example OLED materials, and optionally further additives.
  • the cleaning device 8 has at least one degassing device 9 with which the gas content in the fluid can be reduced.
  • a particle filter 10 for example a membrane filter with a pore diameter of 1 ⁇ m, is arranged downstream of the degassing device 9.
  • the fluid is then guided through the fluid line section 4, in which a contamination measuring device 11 is arranged.
  • a contamination parameter can be used with the contamination measuring device 11 be determined for the flowing fluid.
  • the fluid line section 4 merges into a further fluid line section 5, which again opens into the fluid storage container 6, as a result of which the cleaning circuit 2 of the printing device 1 is closed.
  • the fluid line sections 3 and 5 can be combined in the transition area to the fluid reservoir 6 in a common connection device 12, which facilitates a quick and tight connection of the fluid line sections 3 and 5 of the cleaning circuit 2 to the fluid reservoir 6.
  • a common connection device 12 a separate connection device can also be provided for each fluid line section 3 and 5.
  • the mouths of the fluid line sections 3 and 5 protruding into the fluid reservoir form a fluid withdrawal device and a fluid refilling device for the fluid reservoir 6.
  • a print head 13 of the printing device 1 is connected via a feed line 14 to the cleaning circuit 2 of the printing device 1, which branches off from the cleaning circuit 2 after the contamination measuring device.
  • the supply line 14 can be closed and the cleaning circuit 2 can be opened, or the supply line 14 can be opened so that fluid circulating in the cleaning circuit 2 is branched off from the cleaning circuit 2 and fed to the print head 13.
  • the cleaning circuit 2 can be blocked with the valve 16, so that the fluid quantity removed from the fluid reservoir 6 is completely supplied to the print head 13 is supplied.
  • FIG 2 a different configuration of a printing device 1 according to the invention is shown merely by way of example.
  • the print head 13 is via a return line 17 and a further valve 18 are connected to the cleaning circuit 2, so that the print head 13 can be included in the cleaning circuit 2 and can be flowed through by the fluid which circulates in the cleaning circuit 2.
  • supply lines to individual printhead nozzles and storage chambers or other components of the printhead 13 can also be flowed through and cleaned, or the fluid can be fed to the printhead 13 and then fed to the return line 17 without flowing through individual components of the printhead 13 .
  • the supply line 14 and the print head 13 and the return line 17 are also cleaned.
  • the fluid can circulate in the cleaning circuit 2 and be continuously cleaned in the cleaning device 8 until a contamination parameter determined with the contamination measuring device 11 falls below a first threshold value for the maximum permissible contamination content.
  • the cleaning circuit 2 can then be blocked with the valve 16 and the cleaned fluid can be fed to the print head 13 via the feed line 14 while the printing process is being carried out.
  • the fluid can also in the Figure 2 schematically shown printing device 1 first circulate in the cleaning circuit 2, without the print head 13 being connected and flowing through the fluid.
  • a contamination parameter is continuously determined with the contamination measuring device 11 and the fluid is circulated and circulated in the cleaning circuit 2 until a predetermined third threshold value for the contamination content is reached or undershot becomes.
  • the printhead 13 is included in the cleaning circuit 2 and the already pre-cleaned fluid flows through it.
  • any contaminants located in the print head 13 are picked up by the fluid, recorded in the contamination measuring device 11 arranged downstream in the cleaning circuit 2 and filtered out in subsequent flows of the fluid through the cleaning device 8.
  • the circulation of the fluid through the print head 13 can be continued until the contamination parameter determined in the contamination measurement device 11 falls below a second threshold value.
  • the second threshold may correspond to the first threshold mentioned and used in the embodiment discussed above.
  • a threshold value deviating therefrom can also be specified, in order, for example, to specify a less severe contamination content by the contamination measuring device 11 after cleaning the print head 13, since subsequent contamination of the fluid by the already cleaned print head 13 can be excluded.
  • the print head 13 is already integrated from the first circulation of the fluid through the cleaning circuit 2 and flows through the fluid and is thereby cleaned.
  • the feed line 14 and the return line 17 along one Line travel section 19 is designed to be flexible, so that the print head 13 is connected to the cleaning circuit 2 such that it can move relative to the cleaning circuit 2.
  • the hollow-cylindrical return line 17 surrounds the feed line 14 arranged centrally therein in the line travel section 19 and additionally shields the feed line 14 from environmental influences and impurities caused thereby.
  • bypass line section 20 which branches off from the fluid line section 4 via a branch 21 and is fed back into the fluid line section 5 via a further branch 22. Only a small amount of fluid sample flows through the contamination measuring device 11, which only represents a small proportion of the fluid circulating in the cleaning circuit 2. The respective proportion of the amount of fluid flowing through the bypass line section 20 and through the fluid line section 4 guided in parallel can be detected or controlled via a flow measuring device 23.
  • a rigid fluid storage container 6 which can be, for example, a bottle or a metallic container
  • a flexible fluid storage container is used, for example a bag or can be a flexible plastic container.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Coating Apparatus (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (17)

  1. Procédé pour faire fonctionner un dispositif d'impression (1), dans lequel un fluide qui est destiné à une opération d'impression est alimenté depuis un conteneur de stockage de fluide (6) via une ligne d'alimentation (14) jusqu'à une tête d'impression (13) afin qu'il puisse être appliqué sur une surface par la tête d'impression (13), dans lequel le fluide est convoyé au travers d'un dispositif de purification (8) dans un circuit de purification (2) et un facteur de contamination d'un échantillon de fluide dans le circuit de purification (2) est déterminé au moyen d'un dispositif de mesure de contamination (11), dans lequel une opération d'impression, au moyen de laquelle le fluide est délivré depuis la tête d'impression (13), est démarrée seulement après que le facteur de contamination a chuté en-deçà d'une première valeur de seuil, et caractérisé en ce que le fluide qui s'écoule au travers du circuit de purification (2) peut être alimenté jusqu'à la tête d'impression (13) via la ligne d'alimentation (14), laquelle est dérivée à partir du circuit de purification (2) et connecte le circuit de purification (2) à la tête d'impression (13).
  2. Procédé selon la revendication 1, caractérisé en ce que l'échantillon de fluide qui est destiné à la détermination du facteur de contamination est dérivé hors du circuit de purification (2), est alimenté sur le dispositif de mesure de contamination (11), et, après la détermination du facteur de contamination, est alimenté en retour à l'intérieur du circuit de purification (2) à nouveau.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la tête d'impression (13) comporte une ligne de retour (17) à l'intérieur du circuit de purification (2) et en ce qu'une quantité de fluide de nettoyage de tête d'impression qui a été convoyée à l'intérieur de la tête d'impression (13) est retirée hors de la tête d'impression (13) à nouveau et est alimentée en retour à l'intérieur du circuit de purification (2).
  4. Procédé selon la revendication 3, caractérisé en ce qu'un facteur de contamination de la quantité de fluide de nettoyage de tête d'impression qui a été alimentée en retour depuis la tête d'impression (13) est déterminé au moyen du dispositif de mesure de contamination (11) et en ce que l'opération d'impression au moyen de la tête d'impression (13) est démarrée seulement après que le facteur de contamination a chuté en-deçà d'une deuxième valeur de seuil.
  5. Procédé selon la revendication 4, caractérisé en ce que le fluide est seulement alimenté jusqu'à la tête d'impression (13) après qu'un facteur de contamination du fluide qui est convoyé dans le circuit de purification (2) qui est déterminé au niveau de l'étape de purification de fluide a chuté en-deçà d'une troisième valeur de seuil.
  6. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que, au niveau de l'étape de purification de fluide, le fluide est convoyé au travers d'au moins un filtre à particules (10) et au travers d'au moins un dispositif de dégazage (9).
  7. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que le facteur de contamination est composé d'un ou de plusieurs facteur(s) de teneur en particules et d'un ou de plusieurs facteur(s) de teneur en gaz, lesquels sont dans chaque cas déterminés au moyen du dispositif de mesure de contamination (11).
  8. Dispositif d'impression (1) comportant une tête d'impression (13) et comportant un connecteur (12) pour un conteneur de stockage de fluide (6), lequel est connecté à la tête d'impression (13) via une ligne d'alimentation (14) de telle sorte que le fluide puisse être alimenté hors du conteneur de stockage de fluide (6) jusqu'à la tête d'impression (13) et qu'il puisse être appliqué sur une surface par la tête d'impression (13), caractérisé en ce que le connecteur (12) comporte un dispositif de retrait de fluide et un dispositif de remplissage de fluide pour le conteneur de stockage de fluide (6), en ce que le dispositif d'impression (1) comporte un circuit de purification (2) qui est formé à partir de sections de ligne de fluide (3, 4, 5) et comporte un dispositif de purification (8) et un dispositif de mesure de contamination (11), dans lequel le fluide qui est retiré à partir du conteneur de stockage de fluide (6) via le dispositif de retrait de fluide peut être purifié, un facteur de contamination d'un échantillon de fluide dans le circuit de purification (6) peut être déterminé et le fluide peut être alimenté en retour sur le conteneur de stockage de fluide (6) via le dispositif de remplissage de fluide, et en ce que la ligne d'alimentation (14) est dérivée à partir du circuit de purification (2) et elle connecte le circuit de purification (2) à la tête d'impression (13) de telle sorte que le fluide qui s'écoule au travers du circuit de purification (2) puisse être alimenté sur la tête d'impression (13).
  9. Dispositif d'impression (1) selon la revendication 8, caractérisé en ce qu'une ligne de retour (17) connecte la tête d'impression (13) au circuit de purification (2) de telle sorte que le fluide qui est alimenté sur la tête d'impression (13) puisse s'écouler au travers de la tête d'impression (13) et puisse être alimenté en retour sur le circuit de purification (2).
  10. Dispositif d'impression (1) selon la revendication 9, caractérisé en ce que la ligne de retour (17) est connectée à la ligne d'alimentation (14) via une ligne de dérivation au niveau de la tête d'impression (13).
  11. Dispositif d'impression (1) selon la revendication 9 ou 10, caractérisé en ce que la ligne de retour (17) entoure complètement la ligne d'alimentation (14) au moins le long d'une section de la ligne d'alimentation.
  12. Dispositif d'impression (1) selon une ou plusieurs des revendications 8 à 11, caractérisé en ce que la tête d'impression (13) peut être déplacée au-dessus d'une zone qui doit être imprimée et en ce que la ligne d'alimentation (14) et la ligne de retour (17) sont flexibles au moins le long d'une section de déplacement de ligne (19).
  13. Dispositif d'impression (1) selon une ou plusieurs des revendications 8 à 12, caractérisé en ce que le dispositif de purification (8) comporte au moins un dispositif de dégazage (9) et au moins un filtre à particules (10).
  14. Dispositif d'impression (1) selon la revendication 13, caractérisé en ce qu'au moins un premier filtre à particules (10) est agencé à l'avant du dispositif de dégazage (9) et au moins un second filtre à particules (10) est agencé après le dispositif de dégazage (9) dans la direction d'écoulement.
  15. Dispositif d'impression (1) selon une ou plusieurs des revendications 8 à 14, caractérisé en ce que le dispositif de mesure de contamination (11) est agencé après le dispositif de purification (8) dans la direction d'écoulement.
  16. Dispositif d'impression (1) selon une ou plusieurs des revendications 9 à 15, caractérisé en ce que la ligne de retour (17) chemine à l'intérieur du circuit de purification à l'avant du dispositif de mesure de contamination (11) dans la direction d'écoulement.
  17. Dispositif d'impression (1) selon une ou plusieurs des revendications 8 à 16, caractérisé en ce qu'une section de ligne de dérivation (20), au travers et au moyen de laquelle le fluide peut être convoyé au travers du dispositif de mesure de contamination (11) de telle sorte que simplement une quantité pouvant être pré-spécifiée d'échantillon de fluide soit convoyée au travers du dispositif de mesure de contamination (11), est agencée dans le circuit de purification (1).
EP17793603.6A 2016-10-21 2017-10-18 Procédé permettant de faire fonctionner un dispositif d'impression et dispositif d'impression Active EP3529082B1 (fr)

Applications Claiming Priority (2)

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DE102016012574.8A DE102016012574A1 (de) 2016-10-21 2016-10-21 Verfahren zum Betreiben einer Druckvorrichtung und Druckvorrichtung
PCT/EP2017/076553 WO2018073281A1 (fr) 2016-10-21 2017-10-18 Procédé permettant de faire fonctionner un dispositif d'impression et dispositif d'impression

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KR102298209B1 (ko) * 2019-12-17 2021-09-06 세메스 주식회사 약액 토출 장치
CN112339432B (zh) * 2020-11-05 2022-04-08 武汉数字化设计与制造创新中心有限公司 一种喷墨打印用喷头供墨与控制系统及方法
KR102568827B1 (ko) * 2020-12-02 2023-08-18 세메스 주식회사 잉크 분리 장치 및 이를 구비하는 기판 처리 시스템
FR3133146A1 (fr) * 2022-03-04 2023-09-08 Exel Industries Système de rinçage d’un filtre et d’une tête d’impression

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JP2019535549A (ja) 2019-12-12
JP7139321B2 (ja) 2022-09-20
CN109789705A (zh) 2019-05-21
US20190240988A1 (en) 2019-08-08
CN109789705B (zh) 2021-11-23
WO2018073281A1 (fr) 2018-04-26
EP3529082A1 (fr) 2019-08-28
TWI735684B (zh) 2021-08-11
KR102436598B1 (ko) 2022-08-25
DE102016012574A1 (de) 2018-04-26
TW201829206A (zh) 2018-08-16
KR20190067884A (ko) 2019-06-17

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