EP2493690B1 - Dispositif de régulation d'un système racloir à chambre - Google Patents

Dispositif de régulation d'un système racloir à chambre Download PDF

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Publication number
EP2493690B1
EP2493690B1 EP10759904.5A EP10759904A EP2493690B1 EP 2493690 B1 EP2493690 B1 EP 2493690B1 EP 10759904 A EP10759904 A EP 10759904A EP 2493690 B1 EP2493690 B1 EP 2493690B1
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EP
European Patent Office
Prior art keywords
ink
doctor blade
pressure
setting device
valve
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Application number
EP10759904.5A
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German (de)
English (en)
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EP2493690A1 (fr
Inventor
Bernd Kurt Masuch
Wolfgang Otto Reder
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Koenig and Bauer AG
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Koenig and Bauer AG
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Publication of EP2493690A1 publication Critical patent/EP2493690A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles

Definitions

  • the invention relates to a pressure adjusting device of a chambered doctor blade system according to the preamble of claim 1.
  • doctor blades are known, the task of which is to meter the amount of ink applied to a specific surface by stripping off the excess ink.
  • One possible embodiment is, for example, the ink transfer by means of a roller, for example an anilox roller, which has a multiplicity of small depressions on its surface and whose webs lying therebetween should remain free of color.
  • a doctor blade mounted on a chambered doctor blade which consists of a closed volume, which is limited by different housing parts and in particular by a part of the anilox roller surface and two doctor blades.
  • the first squeegee in the direction of rotation is the closing squeegee, which closes off the volume
  • the second squeegee in the direction of rotation is the working squeegee, which, through contact with the recesses between the recesses, ensures that the part of the color that is not inside the recesses is largely removed from the roll surface.
  • the pressure inside the chambered doctor blade plays a big role. Depending on how this pressure fails, it may happen that an anilox roller adjacent to the chamber doctor blade receives too little or too little pressure, for example if the pressure is too low. If the pressure is too great, deformations of a doctor blade bar can occur too large a gap between the chamber doctor blade and the anilox roll occurs and it can even lead to damage, for example if a doctor blade is bent over too much pressure.
  • the viscosity of the ink is not constant in many cases.
  • the viscosity depends on the one hand on the temperature of the ink and thus on the operating condition and especially on the temperature of a corresponding printing press.
  • the duck color may become thinner at a higher temperature than at a lower temperature.
  • thixotropic printing inks can be used, d. H. Inks whose viscosity decreases with time as long as they experience shear forces, for example by pumping, and whose viscosity increases again from a rest time with time.
  • a low-viscosity printing ink is pumped into a chamber doctor blade, which has a discharge opening, from which the ink is returned to a color supply in accordance with the principle of gravity, then the problem may arise that the Printing ink simply runs out to this opening, so that too low a pressure in the chamber doctor blade is formed and an anilox roller is not evenly colored.
  • a high-viscosity printing ink is pumped into such a chamber doctor blade with a pump which conveys a constant volume per time, then it may happen that, by suitable measures at the opening and at the points relevant for ink transfer to the anilox roller, a suitable pressure prevails, but at the same time, due to the high viscosity and the associated high pressure drop within the chambered doctor blade, a pressure in a supply line and in an area of an inlet opening of the chambered doctor blade assumes too high values, so that damage may occur or in certain areas too much ink is transferred to the anilox roller.
  • control devices which regulate the use of appropriate sensors, the pressure in the chambered doctor blade on the pump power and / or a controllable valve in a derivative.
  • a chambered doctor blade in which an overpressure is generated and from the liquid medium by gravity in a reservoir is traceable, wherein if necessary in a return line, a throttle, preferably a manually or automatically controllable valve for setting a flow rate can be arranged.
  • a throttle preferably a manually or automatically controllable valve for setting a flow rate can be arranged.
  • this valve is connected by circuitry with the machine control.
  • a pressure in the chamber doctor blade can thus be regulated by measuring the pressure and influencing a flow rate in a return line.
  • a device for supplying liquid which has a chamber doctor blade, the chamber doctor blade with a reservoir, a pump and supply and discharge lines forms a closed system, wherein inside the chamber doctor blade there is an overpressure, which is regulated by the fact that a bypass line contains a control check valve.
  • a pump operates at a constant speed and a machine control regulates the pressure in the chambered doctor blade via the regulating non-return valve connected to it.
  • a device which is suitable for pressure adjustment in a chambered doctor blade of a printing machine, wherein the chambered doctor blade at least one ink chamber with at least one connected to an ink supply and at least one, a medium from the ink chamber in the ink supply leading back, derivative and / or Has outlet opening and wherein at least one pressure relief valve in the at least one discharge and / or drain opening is arranged and wherein at least one supply line at least one pressure relief valve is arranged and wherein at least one pressure relief valve is designed as a passive pressure relief valve.
  • a device which is suitable for pressure adjustment in a chambered doctor blade of a printing press, the chambered doctor blade at least one ink chamber with at least one connected to a color supply and at least one supply, a medium from the ink chamber in the ink supply leading back, discharge and / or drain port and wherein at least one valve is arranged in the at least one discharge and / or outflow opening and at least one valve is arranged in at least one supply line, wherein the at least one valve in the at least one supply line is arranged in connection with a bypass line and in that Bypass line is arranged to effect a return of the medium in the ink supply.
  • the DE 102 25 681 A1 and the EP 0 780 228 A1 each is a device known, which is suitable for pressure adjustment in a chamber blade of a printing press, wherein the chambered scraper has at least one ink chamber with at least one connected to a color supply and at least one supply, a medium from the ink chamber in the ink supply leading back, discharge and / or drain port and wherein at least one valve is arranged in the at least one discharge and / or outflow opening, wherein at least one valve in the at least one supply line with a bypass line is arranged in connection and wherein the bypass line is arranged to effect a return of the medium in the ink supply.
  • a device which is suitable for pressure adjustment in a chambered doctor blade of a printing press, the chambered doctor blade at least one ink chamber with at least one connected to a color supply and at least one supply, a medium from the ink chamber in the ink supply leading back, discharge and / or drain port and wherein at least one valve is arranged in the at least one discharge and / or outflow opening.
  • a ink supply system of a printing machine which has a paint chamber with a connected to a color supply and a supply line, a return path of a medium from the ink chamber in the ink supply forming discharge and / or drain port and wherein a pressure relief valve is arranged on the supply line is arranged with a bypass line in a line connection standing and the bypass line is arranged a return path of the medium from the supply line in the ink supply at least partially.
  • a chamber doctor blade system of a printing machine which has a discharge line and a supply line.
  • the supply line has a partial section which leads through a container filled with a temperature control medium.
  • a mixing the temperature control mixing device is arranged.
  • the invention has for its object to provide a Druckeinstellvortechnisch a chambered doctor blade system.
  • the achievable with the present invention consist in particular that both high and too low pressures in the interior of the chambered doctor blade and associated lines are avoided by a secure adjustment of the pressure in the interior of the chambered doctor blade.
  • This takes place in different phases or operating states of the corresponding printing press by ensuring compliance with the appropriate pressure conditions both in the case of highly viscous and in the case of low-viscosity ink.
  • a transfer of ink to the anilox roller is optimized and pressure-related damage and / or Quality reductions are avoided or at least significantly reduced.
  • the setting of a pressure which is within a certain range also significantly increases the service life of doctor blades used, since the friction between the doctor blade and the roller and between the doctor blade and the viscous ink is influenced by the pressure inside the chamber doctor blade.
  • a pressure in the chambered doctor blade is thus directly influenced and not indirectly via at least one intermediate step, for example a conversion of a measured pressure into a required valve position with subsequent verification of the resulting pressure.
  • This saves effort and costs and enables active, possibly vulnerable control and / or Control units are not necessary.
  • pressure relief valves are arranged, preferably at least two, one of which defines an upper pressure limit and a lower pressure limit.
  • a pressure sensor can still measure the actual pressure in the interior of the chambered doctor blade and, if necessary, forward a corresponding signal for further processing.
  • a further advantage is that the pressure adjustment device provides with simple means and in different operating states for a pressure inside the chamber doctor blade, which is within a desired range at all relevant times, in particular during an entire printing operation and independent of a current viscosity of the ink. so that the above-described difficulties or damage can be avoided and yet an equipment cost is kept low.
  • bypass line printing ink which is conveyed from the ink supply in the direction of the ink chamber, at the ink chamber can be carried over and back into the ink supply, whereby, for example, a pump can run regardless of the currently prevailing pressure and just existing viscosity and at a constant speed or flow rate and requires no regulation.
  • Another advantage is that, for example, in a collecting container at least one stirring device is arranged, which ensures a lower fluctuation viscosity of a thixotropic printing ink, for example, in an interruption of a printing process by the ink can be kept in motion with the stirring device.
  • the at least one valve can be arranged in and / or on a supply line and that the arrangement of the at least one valve can thus be adapted to flow and / or pressure conditions.
  • an arrangement on a supply line, in particular in a supply branch can keep a flow path in the supply line as uniform as possible, while an arrangement directly in the supply line can provide for possibly desired turbulence, for example for influencing the viscosity of the printing ink.
  • the wear of the doctor blades can be further reduced.
  • the wear is less than if no coating were present or the coating was only on the work surface or the coating only on the side facing away from the ink of the doctor blade or on the in the direction of rotation adjacent roller rear side or, especially in the case of a chamber doctor blade, would be applied to the chamber interior side facing away from the doctor blade.
  • the application of the low-wear coating on the front side in the direction of rotation of the adjacent roller takes into account the fact that the adhesion of this coating to the doctor body material is not always optimal.
  • the coating is pressed by the forces due to the rotation of the adjacent roller against the squeegee body material, while when applied to the rear in the direction of rotation of the adjacent roller surface of the doctor blade, the effective forces pull the coating material away from the doctor blade body and thus a chipping and promote the wear more.
  • Fig. 1 is exemplified a printing unit of a printing press, in particular an offset printing machine, in which a chambered doctor blade 01 can be used.
  • the printing unit shown can be used for example for the waterless sheet or web offset printing and has at least one chambered doctor blade 01, which serves to print ink on an adjacent roller 02, z. B. apply an anilox roller 02, so that the ink from there over another roller 03, z. B. an inking roller 03 on a cylinder 04, z. B. a forme cylinder 04 and then to a cylinder 06, z. B. a transfer cylinder 06 is transmitted.
  • the transfer cylinder 06 which may be formed as a counter-pressure cylinder 07, a material 08, here, for example, without limiting the invention thereto, a web 08, z. B. a paper web 08 or short web 08 passed, so that finally the ink is transferred to this web 08.
  • the impression cylinder 07 may be formed as a further transfer cylinder 06.
  • a pump 09 for example, color pumps 09
  • ink via one or more leads 11 from one of the respective pump 09 associated ink supply 12 in a paint chamber 13 of the chambered doctor blade 01.
  • One or more leads 14 provide the opportunity to dissipate excess ink from the ink chamber 13 and supply the ink supply 12 again.
  • the pump 09 may be formed, for example, as a peristaltic pump 09.
  • a total of two supply lines 11 are arranged at two ends of a paint chamber 13 and a discharge 14 or discharge opening 31 is arranged in the middle between the two supply lines to the ink chamber 13 and with each of the two leads 11 each have a pump 09 cooperatively arranged ,
  • a sensor 16; 16 ', z. B. a pressure sensor 16; 16 ' which is preferably arranged directly in the ink chamber 13 of the chambered doctor blade 01 ( Fig. 2 ), but for example also in the derivative 14 and discharges 14 of the chambered doctor blade 01 may be integrated ( Fig. 1 ).
  • the sensor 16; 16 ' may also be arranged in a feed line 11.
  • This sensor 16; 16 ' monitors the pressure at the location where it is located, preferably to provide a signal indicative of the pressure in the ink in the ink chamber 13, and reports the result to, for example, a machine controller 17.
  • This machine control 17 can For example, if necessary, influence on the at least one pump 09 to cause, for example, a shutdown in the event of malfunction.
  • a plurality of sensors 16; 16 'to order can be used to report the result to, for example, a plurality of sensors 16; 16 'to order.
  • Fig. 2 also shows an enlarged view of an exemplary, adjacent in operation anilox 02.
  • a coating 21 is applied, which consist for example of ceramic and may have wear-resistant properties.
  • small recesses 22 are engraved, preferably by laser engraving, which have a defined volume and serve to accommodate the ink.
  • the recesses 22 may be, for example, wells or Haschuren.
  • the representation, in particular of the surface 19, the coating 21, the recesses 22 and the webs 23, is not to scale.
  • the chambered doctor blade 01 is adjacent to the anilox roller 02. Apart from located on the front sides of the chambered doctor blade 01 side shields 24, the only in Fig. 3 are visible, the anilox roller 02 is preferably contacted only by two other parts of the chambered doctor blade 01, namely a closing squeegee 26, which the first doctor blade 26, so the front Doctor blade 26 in the direction of rotation A of the anilox roller 02, and a working doctor blade 27, which is in the direction of rotation A, the second doctor blade 27, so the rear doctor blade 27. It should be noted that with the direction of rotation A always the direction of rotation of the corresponding anilox roller 02 during the printing operation is meant.
  • the closing squeegee 26 and the working doctor blade 27 are each connected to a housing 28 of the chambered doctor blade 01. Housing 28, closing squeegee 26, working doctor blade 27 and the corresponding section of the anilox roller 02 thus form together with the side shields 24 a closed volume in the interior of the chambered doctor blade 01, namely the aforementioned ink chamber 13.
  • This ink chamber 13 has only one or more inflow openings 29 and a or a plurality of outflow openings 31, which serve to supply and / or discharge of printing ink into and / or out of the ink chamber 13.
  • the part of a tangent plane 33 pointing from a contact line 32 of closing squeegee 26 and anilox roller 02 in the direction of rotation A to the anilox roller 02 includes a dotted angle ⁇ with the closing squeegee 26.
  • the angle ⁇ is preferably greater than 120 ° and less than 165 °.
  • the part of a tangent plane 36 pointing to the anilox roller 02 from a contact line 34 of working doctor blade 27 and anilox roller 02 in the direction of rotation A includes an acute angle ⁇ with the working doctor blade 27.
  • the angle ⁇ is preferably greater than 15 ° and less than 60 °.
  • a possible coating 37 is in the example shown in the work doctor blade 27 exclusively on the, seen in the direction of rotation A of the adjacent anilox roller 02, front side of the work doctor blade 27, ie on the ink and the ink chamber 13 facing side of the work doctor blade 27 and the closing squeegee 26 exclusively on the, seen in the direction of rotation A of the adjacent anilox roller 02, front side of the closing blade 26, ie on the printing ink and the ink chamber 13 side facing away from the closing blade 26th
  • the coating 37 is not intended to be limiting 4, because it is possible for the coating 37 to be located on one of the two sides or on both sides of the closing squeegee 26 and it is equally possible for the coating 37 to be on one of the two sides or on both sides of the working squeegee 27 located. It is also conceivable that the coating 37 is only on the closing blade 26 or only on the working doctor blade 27, even in these two cases, the coating 37 may be mounted on one or both sides of the closing blade 26 or the work doctor blade 27.
  • the following directions and dimensions are defined on the closing squeegee 26 and working squeegee 27, which are preferably in the form of a narrow metal band:
  • the length is the dimension in the direction B parallel to the axis of rotation of the adjoining anilox roller 02.
  • the width is in each case the largest dimension perpendicular to the length of the closing squeegee 26 and
  • the height is the extension in the direction perpendicular to the length and the width.
  • the coating 37 extends in the direction parallel to the axis of rotation B of the adjacent anilox roller 02 over at least a part, but preferably over the entire length of the closing blade 26 and / or the working doctor blade 27.
  • the width of the coating 37 ie the extent of the coating 37 the surface of the closing blade 26 and / or the working blade 27 along the direction of the width of the closing blade 26 and / or the working doctor blade 27 is 1 mm to 8 mm, but preferably 4 mm to 6 mm.
  • the thickness of the coating 37 ie the extent of the coating 37 in the direction of the height of the closing squeegee 26 and / or the working doctor blade 27 is 10 .mu.m to 300 .mu.m, but preferably 150 .mu.m to 250 .mu.m.
  • the material of the coating 37 is, for example, a ceramic, which is applied, for example, in a spraying process.
  • Al 2 O 3 aluminum oxide
  • ZrO 2 zirconium dioxide
  • TiO 2 titanium dioxide
  • Al 2 O 3 serving as the base material and preferably ZrO 2 with a mass fraction of 20-50%
  • TiO 2 is represented by a mass fraction of 0 - 20% of the total mass.
  • the ceramic coating is made of 90-99%, but preferably 97%, of Al 2 O 3 , while the remaining mass fraction consists of TiO 2 .
  • Fig. 3 shows a perspective view of the entire squeegee beam 38, which carries all the important elements of the chambered doctor blade 02.
  • the side shields 24 for closing off the ink chamber 13, which in this example two inlet openings 29, which in this example a discharge opening 31 and the working doctor blade 27 and the closing squeegee 26 are indicated.
  • At least one valve 39 is arranged ( 4 and 5 ), which is designed as a pressure relief valve 39 and preferably as a passive pressure relief valve 39 which automatically opens at high pressure and thereby has only mechanical components, which are preferably not actively controlled or regulated. Under an active control or regulation is an intervention of an operator and / or an electrical circuit in the control or regulating process to understand.
  • a passive pressure relief valve 39; 41 no sensor is connected in terms of circuitry.
  • Fig. 4 shows a similar section as Fig. 2 , but with fewer details and instead with a said valve 39.
  • This at least one valve 39 opens the corresponding discharge line 14 and / or discharge opening 31 only when, on the side of the valve 39, that of the ink chamber 13 is present, a certain minimum pressure is present, which is preferably in the range of 10 kPa to 50 kPa and more preferably in the range of 15 kPa to 20 kPa.
  • discharges 14 may be formed as downwardly open lines, so that a color return is caused at least in connection to the preferred valves 39 by gravity solely by gravity and no closed system is formed. It is also possible to arrange a closable additional line between ink chamber 13 and ink supply 12 for example, gravitation-related emptying of the ink chamber 13 parallel to a valve 39 containing a valve 39. Such is not shown in the figures.
  • At least one valve 41 is likewise arranged ( 6 and 7 ), which is designed as a pressure relief valve 41 and preferably as a passive pressure relief valve 41.
  • This at least one valve 41 closes or opens an outlet opening 46 and thereby preferably a bypass line 42.
  • Ink chamber 13 would be too large and the pump 09 still promotes ink in the direction of ink chamber 13, an excess part of the ink are diverted, preferably back into the ink supply 12 and more preferably at least after passing the at least one valve 41 also caused solely by gravity.
  • a maximum pressure above which the at least one valve 41 is opened is preferably in the range from 60 kPa to 160 kPa and more preferably in the range from 60 kPa to 80 kPa.
  • the maximum pressure at which the at least one valve 41 opens is preferably above the minimum pressure at which the valve 39 opens.
  • a feeder branch is to be understood as a line segment which branches off from a supply line 11, for example by means of a T-piece. Regardless of whether the at least one valve 41 is arranged in a feed line 11 or in a feeder branch, it forms a control device by means of which bypassing the ink chamber 13 is controlled by printing ink.
  • a valve 41 in a supply line 11 is to be understood an arrangement in which at least one component of the valve 41 intersects a shortest flow path through the supply line 11.
  • An arrangement of a valve 41 on a supply line 11 is to be understood as an arrangement in which at least one component of the valve 41 does not intersect a shortest flow path through the supply line 11 but is arranged, for example, in a supply branch, in particular in the bypass line 42.
  • all lines should be assumed to be one-dimensional, ie as lines.
  • Both the at least one valve 39 and the at least one valve 41 are preferably as passive valves 39; 41 are executed, which are closed to a respective pressure and are open from that particular pressure.
  • One possibility for a particularly simple construction of such a valve 39; 41 is to close an opening with a lid 43 by being pressed by a spring 44 against the opening.
  • This spring 44 both as a compression spring 44 can press the lid 43 from the side of the lower pressure against the side of the higher pressure and as a tension spring 44 pull the cover 43 from the side of the higher pressure against the opening of the line.
  • a volume is preferably sealed with it and prevents the escape of ink, while in the case of the valve 41 a branch in a line is closed and only optionally opens up a further possible path for transported printing ink.
  • the cover 43 and / or the opening cooperating with it preferably has sealing means, for example a rubber ring, in order to ensure a tight closure.
  • valves 39; 41 open of course, of the ink used and the design of the chambered doctor blade 01 are generally dependent, but with the specified pressure ranges could be achieved particularly good results.
  • pressures of 70 kPa and with a valve 41 pressures of 30 to 40 kPa can be achieved.
  • pressures of 150 kPa without valve 41 and 70 kPa with valve 41 are possible.
  • the valves 39; 41 means 47, by means of which a pressure is adjustable, in which a corresponding valve 39; 41 opens.
  • a pressure is adjustable
  • the minimum pressure and the maximum pressure in the ink chamber 13 can be adjusted manually and / or via the machine control 17 and no longer need to be monitored subsequently.
  • a means 47 is shown, which may be a screw 47, for example.
  • a bias of the spring 44 can be influenced by a displacement of the means 47. A greater bias of the spring 44 means that the lid 43 is pressed with greater force against the opening and thus a larger force, so a larger pressure is needed to the valve 39; 41 to open.
  • a pressure is maintained in the ink chamber 13 at least during operation of the pump 09, which is between a preferably adjustable minimum pressure and a preferably adjustable maximum pressure. This happens as follows:
  • the chamber doctor blade 01 In an operating state in which low-viscosity ink is pumped by the pump 09 through the supply line 11, the chamber doctor blade 01 should be filled with printing ink from a point in time.
  • the at least one valve 39 ensures that the low-viscosity printing ink accumulates in the ink chamber 13 and a certain minimum pressure is built up. Only when this minimum pressure is reached, the valve 39 opens and allows ink to escape in a different way than via the anilox roller 02.
  • the pump 09 continues to pump ink of constant power in the ink chamber 13, so that the pressure can be maintained. Should the pressure be too low for any reason, the valve 39 closes by itself and prevents further pressure drop.
  • the valve 41 is in this operating condition normally without influence, since it only from opens a higher pressure.
  • the chamber doctor blade 01 In an operating state in which highly viscous printing ink is pumped by the pump 09 through the supply line 11, the chamber doctor blade 01 will also be filled with printing ink from a point in time.
  • the pressure inside the chamber doctor blade 01 increases and as soon as the minimum pressure is reached, the valve 39 opens.
  • the high-viscosity properties of the printing ink result in a strong pressure drop within the printing ink between, for example, the inlet opening 29 and the outlet opening 31.
  • the minimum pressure at To achieve valve 39 it may happen that in the region of the inflow opening 29, a very high pressure is produced, for example of 150 kPa or even more.
  • the valve 41 opens at a maximum pressure of preferably 60 kPa to 80 kPa and provides for a reduction of the pressure prevailing there. A complete redirection of the ink, which would cause that no more ink ink chamber 13 would be supplied , Is avoided because at too low pressure, the valve 41 closes again and all the ink is supplied to the ink chamber 13.
  • At least one stirring device 49 is arranged in regions which are arranged downstream of the discharge opening 31 and upstream of the pump 09, for example in a collecting container 48 or also generally in regions in which otherwise low shear forces prevail within the printing ink ( Fig. 1 . 8th . 9a and 9b ).
  • This stirring device 49 serves, for example, to keep a thixotropic printing ink in motion and thereby to keep its viscosity low, for example in the case of an interruption of a printing operation or also during the preparation of a printing operation. This facilitates, for example, a pumping operation of the pump 09 and ensures lower fluctuations in the viscosity of the printing ink.
  • the stirring device 49 serves to bring the ink in a, in particular with regard to their viscosity, advantageous state and / or to keep in this.
  • the stirring device 49 is arranged so that no air bubbles are stirred into the ink, for example, the stirring device 49 or at least relevant components of the stirring device 49 may be disposed completely below a surface of the ink, ie within the ink.
  • Relevant components of the stirring device 49 are in particular those components of the stirring device which are in contact and / or come into contact with the printing ink.
  • An embodiment of a stirring device 49 which also in Fig. 8 . 9a and 9b can be seen, is a rod rotatable about its longitudinal axis, which has at least one arc and to avoid imbalances at least two bows. Under an arc is a part of the rod to understand that interferes with a rotational symmetry of the rod.
  • other embodiments are conceivable, for example, helical, helical, propeller-like or the like.
  • a chamber doctor blade system preferably has at least one chamber doctor blade 01, at least one ink chamber 13, at least one ink supply 12, at least one pump 09 at least one supply line 11 and at least one discharge line 14 and / or at least one discharge opening 31.
  • the chambered doctor blade system preferably has at least one bypass line 42 and at least two valves 39; 41 on.
  • a return flow path is preferably an array of conduits and / or surfaces and / or downcomers along which ink or a generic medium may pass from a particular location back into the ink supply 12. From the at least one supply line 11, at least one possible return flow path leads through the at least one ink chamber 13, the at least one valve 39 and the at least one discharge line 14 and / or discharge opening 31 and at least one other return flow path through the at least one valve 41 and the at least one Bypass line 42.
  • the bypass line 42 may also be very short and in particular consist only of an opening 42 which is opened in case of doubt by the corresponding valve 41 and the way from the supply line into the open and ultimately releases back into the ink supply 12.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (15)

  1. Dispositif de réglage de pression d'un système de racle à compartiment d'une machine à imprimer, où ledit système de racle à compartiment comporte au moins une racle à compartiment (01), et au moins un compartiment d'encre (13) avec au moins un conduit d'amenée (11) relié à au moins un réservoir d'encre (12) et avec au moins un conduit d'évacuation (14) et/ou une ouverture de vidange (31) formant au moins en partie un chemin de retour d'un fluide du ou des compartiments d'encre (13) vers le ou les réservoirs d'encre (12), où au moins une soupape de surpression (39) est montée dans le ou les conduits d'évacuation (14) et/ou dans l'ouverture ou les ouvertures de vidange (31), et où au moins une soupape de surpression (41) est montée dans et/ou sur au moins un conduit d'amenée (11), caractérisé en ce que la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont disposées en liaison de conduction avec au moins une conduite de dérivation (42), et en ce que la ou les conduites de dérivation (42) sont disposées de manière à former au moins en partie un chemin de retour du fluide du ou des conduits d'amenée (11) vers le ou les réservoirs d'encre (12).
  2. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (39) montées dans le ou les conduits d'évacuation (14) et/ou dans l'ouverture ou les ouvertures de vidange (31) et la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont respectivement réalisées comme soupapes de surpression passive (39 ; 41), à ouverture automatique en cas de pression trop élevée et ne comportant que des pièces mécaniques.
  3. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (39) montées dans le ou les conduits d'évacuation (14) et/ou dans l'ouverture ou les ouvertures de vidange (31) sont réalisées comme soupapes de supression (39) s'ouvrant sous pression minimale, en ce que la ou les soupapes de suppression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont réalisées comme soupapes de surpression (41) s'ouvrant sous pression maximale, et en ce que la pression minimale est inférieure à la pression maximale.
  4. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce qu'une seule pompe (09) est montée par conduit d'amenée (11).
  5. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce qu'au moins un dispositif d'agitation (49) maintenant le fluide en mouvement est monté, ou peut être monté.
  6. Dispositif de réglage de pression selon la revendication 5, caractérisé en ce que le ou les dispositifs d'agitation (49) sont montés dans au moins un réservoir d'encre (12) et/ou dans au moins un récipient collecteur (48).
  7. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (39) montées dans le ou les conduits d'évacuation (14) et/ou dans l'ouverture ou les ouvertures de vidange (31) sont réalisées comme soupapes à ouverture sous une surpression comprise entre 10 kPa et 50 kPa.
  8. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (39) montées dans le ou les conduits d'évacuation (14) et/ou dans l'ouverture ou les ouvertures de vidange (31) sont réalisées comme soupapes à ouverture sous une surpression comprise entre 15 kPa et 20 kPa.
  9. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont réalisées comme soupapes à ouverture sous une surpression comprise entre 60 kPa et 160 kPa.
  10. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont réalisées comme soupapes à ouverture sous une surpression comprise entre 60 kPa et 80 kPa.
  11. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont montées directement dans le ou les conduits d'amenée (11).
  12. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les soupapes de surpression (41) montées dans et/ou sur le ou les conduits d'amenée (11) sont montées sur la ou les conduits d'amenée (11), autrement dit dans un embranchement du conduit d'amenée.
  13. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que la ou les conduites de dérivation (42) forment au moins en partie le chemin de retour du fluide du ou des conduits d'amenée (11) vers le ou les réservoirs d'encre (12) en contournant au moins un compartiment d'encre (13).
  14. Dispositif de réglage de pression selon la revendication 1, caractérisé en ce que le système de racle à compartiment comprend une seule pompe (09).
  15. Dispositif de réglage de pression selon la revendication 2, caractérisé en ce que seuls des conduits conduisant ou aptes à conduire le fluide sont reliés aux soupapes de surpression passives (39 ; 41).
EP10759904.5A 2009-10-28 2010-09-30 Dispositif de régulation d'un système racloir à chambre Active EP2493690B1 (fr)

Applications Claiming Priority (2)

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DE102009046078A DE102009046078A1 (de) 2009-10-28 2009-10-28 Vorrichtung zur Druckeinstellung in einer Kammerrakel
PCT/EP2010/064521 WO2011051072A1 (fr) 2009-10-28 2010-09-30 Dispositif de régulation d'un système racloir à chambre

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EP2493690B1 true EP2493690B1 (fr) 2014-12-17

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CN (1) CN102802950B (fr)
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WO (1) WO2011051072A1 (fr)

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US20140261032A1 (en) * 2013-03-15 2014-09-18 P. Kenneth Deneka Coating Head for Printers and Coaters
ES2874079T3 (es) 2015-10-27 2021-11-04 Macarbox S L U Dispositivo para aplicar un fluido a un rodillo
CN105235404A (zh) * 2015-11-20 2016-01-13 浙江维涅斯装饰材料股份有限公司 一种柔版印刷工艺
WO2017198296A1 (fr) * 2016-05-18 2017-11-23 Applied Materials, Inc. Appareil de traitement continu d'un substrat souple dans un vide et procédé associé
CN109514991B (zh) * 2018-12-30 2024-09-27 张家港康得新光电材料有限公司 一种刮刀夹具装置及其刮液方法、配向膜印刷机
US12097694B2 (en) 2019-04-05 2024-09-24 Bobst Bielefeld Gmbh Ink supply system
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DE102019123632A1 (de) * 2019-09-04 2021-03-04 Koenig & Bauer Ag Behälter zur Bereitstellung von Druckfarbe in einem Farbwerk einer Druckmaschine
DE102019123634A1 (de) * 2019-09-04 2021-03-04 Koenig & Bauer Ag Farbrührwerk zum Umwälzen von Druckfarbe in einer in einem Farbwerk einer Druckmaschine angeordneten Farbwanne und Farbwerk einer Druckmaschine mit diesem Farbrührwerk
DE102019123633A1 (de) * 2019-09-04 2021-03-04 Koenig & Bauer Ag Farbwerk einer Druckmaschine
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CN102802950B (zh) 2014-12-10
DE102009046078A1 (de) 2011-05-05
EP2493690A1 (fr) 2012-09-05
US20120210891A1 (en) 2012-08-23
CN102802950A (zh) 2012-11-28
WO2011051072A1 (fr) 2011-05-05

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