EP2493690A1 - Druckeinstellvorrichtung eines kammerrakelsystems - Google Patents
Druckeinstellvorrichtung eines kammerrakelsystemsInfo
- Publication number
- EP2493690A1 EP2493690A1 EP10759904A EP10759904A EP2493690A1 EP 2493690 A1 EP2493690 A1 EP 2493690A1 EP 10759904 A EP10759904 A EP 10759904A EP 10759904 A EP10759904 A EP 10759904A EP 2493690 A1 EP2493690 A1 EP 2493690A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- doctor blade
- valve
- supply line
- druckeinstellvorrichtung
- 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.)
- Granted
Links
- 238000007639 printing Methods 0.000 claims abstract description 48
- 238000003756 stirring Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000000976 ink Substances 0.000 description 123
- 238000007774 anilox coating Methods 0.000 description 32
- 239000011248 coating agent Substances 0.000 description 27
- 238000000576 coating method Methods 0.000 description 27
- 239000000463 material Substances 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 238000007645 offset printing Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009974 thixotropic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002572 peristaltic effect Effects 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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 large number of smaller ones on its surface
- 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.
- Offset printing is significantly higher than the viscosity of the inks used in flexographic printing. While a viscosity range of approx. 0.05 to 0.5 Pa * s is usual in flexographic printing, the value for the printing inks in waterless offset printing is approx. 10 to 150 Pa * s. Thus, in waterless offset printing a higher wear is to be expected ß.
- 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 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. In a preferred embodiment of 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.
- EP 0 461 426 B1 discloses 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.
- WO 03/091 027 A1 and DE 197 57 094 A1 discloses a device which is suitable for pressure adjustment in a chambered doctor blade of a printing press, wherein 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 recirculating, discharge and / or drain opening and wherein at least one pressure relief valve in the at least one derivative and / or
- Drain port is arranged and wherein in 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, wherein the chambered doctor blade at least one ink chamber with at least one, connected to a supply of ink supply and at least one, a medium from the ink chamber in the ink supply 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 with a bypass line in Connection is arranged standing and that the bypass line a return of the medium in the
- Color supply is arranged causing.
- DE 102 25 681 A1 and EP 0 780 228 A1 each have 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.
- US 2002/0023587 A1 discloses a device which is suitable for adjusting the pressure in a chamber doctor blade of a printing press, wherein the chamber doctor blade has at least one ink chamber with at least one supply line connected to an ink supply and at least one medium from the ink chamber into the ink supply having recirculating, discharge and / or drain opening and wherein at least one valve in the at least one discharge and / or drain opening is arranged.
- the invention has for its object to provide a Druckeinstellvoroplasty a
- Optimized ink on the anilox roller 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.
- Overpressure 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.
- Another advantage is that by an arranged bypass line printing ink, which is conveyed from the ink supply in the direction of the ink chamber, at the ink chamber over and back into the paint supply can be transported, thereby
- 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 is for a fluctuation poorer
- Viscosity of a thixotropic 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
- 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.
- Coating on squeegee body material is not always optimal. Due to the described arrangement, the coating by the forces due to the rotation of the
- the effective forces pull the coating material away from the doctor blade body and thus promote chipping and wear more.
- Fig. 1 is a schematic representation of a printing unit; an enlarged view of a detail of Fig. 1, in which a Chamber doctor blade and an anilox roller can be seen;
- FIG 3 is a perspective view of a chambered doctor blade including the inlet and outlet openings.
- FIG. 4 shows a representation similar to that in FIG. 2, with a valve in the outflow opening
- Fig. 5 is an enlarged view of the valve of Fig. 4;
- FIG. 6 shows a valve for opening or closing a bypass line
- Fig. 7 is another view of the valve of Fig. 6;
- FIG. 8 shows a schematic perspective view of a stirring device in a collecting container
- FIG. 9 shows a schematic side view a) and a top view b) of a stirring device in a collecting container from FIG. 8.
- a paint or generally any other medium that can be promoted by means of a pump and / or having the thixotropic properties can be handled with a pressure adjusting device described. All versions are therefore to be understood that under printing ink or general color also lacquers or similar media are to be understood. Furthermore, it should be noted that in the preceding and following from the pressure is mentioned, which is to be understood as a rule an overpressure against a prevailing atmospheric pressure.
- Fig. 1 is an example of a printing unit of a printing press, in particular one
- Offset printing machine shown 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. Between this transfer cylinder 06 and another, with the
- Transfer cylinder 06 cooperating cylinder 07 which serves as a counter-pressure cylinder
- 07 may be formed, a material 08, here, for example, without limiting the invention thereto, a web of material 08, z. B. a paper web 08 or short train
- the printing unit for example, as a double printing for the two-sided
- the impression cylinder 07 may be formed as a further transfer cylinder 06.
- a pump 09 for example ink pumps 09, ink via one or more leads 1 1 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 for the
- the pump 09 may, for example, as a peristaltic pump
- a pump 09 be formed.
- exactly one pump 09 is arranged per supply line 1, but it is also possible that a plurality of supply lines 1 1 and an associated pump 09 is arranged.
- a total of two supply lines 1 1 are arranged at two ends of a paint chamber 13 and a Ab effet14 or drain opening 31 is disposed in the middle between the two leads to the ink chamber 13 and is with each of the two leads 1 1 each have a pump 09th
- 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 can also be integrated, for example, into the discharge line 14 or discharge lines 14 of the chambered doctor blade 01 (FIG. 1).
- the sensor 16; 16 ' may also be arranged in a supply line 1 1.
- 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.
- the enlarged representation of the chambered doctor blade 01 shown in FIG. 2 likewise shows an enlarged representation of an exemplary, anilox roller 02 adjacent to the operation.
- a coating 21 is applied, which consists for example of ceramic and can 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. Between the recesses 22 are webs 23, which should remain free of color and the surfaces of which have the same distance from the axis of rotation of the anilox roller 02 in the radial direction.
- 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 chamber blade 01 side shields 24, which are visible only in Fig. 3, the anilox roller 02 is preferably contacted only by two other parts of the chambered doctor blade 01, namely a closing doctor blade 26, which the first doctor blade 26, so that 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.
- 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.
- Locking scraper 26 a stupfen angle ß.
- the angle ⁇ is preferably greater than 120 ° and less than 165 °.
- Anilox roller 02 includes the working doctor blade 27 at an acute angle ⁇ .
- 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
- Locking blade 26, that is, on the side facing away from the ink and the ink chamber 13 of the squeegee 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 length is the dimension in the direction B parallel to the axis of rotation of the adjacent anilox roller 02.
- the width is in each case the largest dimension perpendicular to the length of the closing blade 26 and / or the working doctor blade 27.
- 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 at least over a part, but preferably over the entire length of the closing doctor blade 26 and / or the working doctor blade 27.
- Coating 37 so the extension of the coating 37 on the surface of the closing blade 26 and / or the working doctor blade 27 along the direction of the width of the
- Squeegee 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 blade 26 and / or the working doctor blade 27 is 10 ⁇ to 300 ⁇ , but preferably 150 ⁇ to 250 ⁇ .
- 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%, and Ti0 2 with one
- Mass fraction of 0 - 20% of the total mass is represented.
- the ceramic coating to 90 -99%, but preferably to 97%, of Al 2 0 3 , while the remaining mass fraction of Ti0 2 consists.
- Fig. 3 shows a perspective view of the entire squeegee bar 38, which carries all the important elements of the chambered doctor blade 02.
- Fig. 3 shows a perspective view of the entire squeegee bar 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 (FIGS. 4 and 5), which serves as a pressure relief valve 39 and preferably as a passive one
- Relief valve 39 is formed, 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. With a passive pressure relief valve 39; 41, no sensor is connected in terms of circuitry. In particular, has a passive pressure relief valve 39; 41 not via wires for a transport of anything other than that too
- 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 outlet 14 and / or
- For putting in the discharge lines 14 may be formed as downwardly open lines, so that a color return is caused at least in connection with the preferred valves 39 by the gravity principle 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 (FIGS. 6 and 7), which is designed as a pressure relief valve 41 and preferably as a passive overpressure valve 41. This at least one valve 41 closes or opens a
- Outlet opening 46 and thereby preferably a bypass line 42 In the event that the pressure in the supply line 1 1 and / or in the inlet opening 29 of the ink chamber 13 would be too large and the pump through the opening of the outlet opening 46 and / or the bypass line 42 09 still promotes ink in the direction of ink chamber 13, an excess portion of the ink to be 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 piece 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 feed branch, it forms a control device by means of which bypassing of the ink chamber 13 is controlled by printing ink. Under an arrangement a valve 41 in a supply line 1 1 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 1 1.
- An arrangement of a valve 41 on a supply line 1 1 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 1 1 but is arranged, for example, in a supply branch, in particular in the bypass line 42.
- shortest flow path For a determination of the shortest flow path are all
- 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 closed with it and prevents leakage of ink, while in the case of the valve 41 a
- Branch is closed in a line and only optionally opens up another possible route for transported 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.
- 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 1 1, 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
- 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 1 1, the chamber doctor blade 01 will also be filled with printing ink from a point in time.
- the pressure in the interior of 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 inflow opening 29 and the outflow opening 31.
- the valve 41 opens at a
- At least one stirring device 49 is arranged in regions which are arranged downstream of the outflow opening 31 and upstream of the pump 09, for example in a collecting container 48 or also generally in regions in which otherwise low shearing forces prevail within the printing ink (FIG 1, 8, 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 improving effect of the interaction of the valves 39; 41 still reinforced. It is not necessarily the task of the stirring device 49 to participate in the actual transport process of the ink, but 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 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 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 serves to bring the ink in a, in particular with regard to their viscosity, advantageous state and / or to keep in this.
- Stirring device 49 arranged so that no air bubbles are stirred into the ink, for example, the stirring device 49 or at least relevant
- 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.
- a stirring device 49 which can also be seen in FIGS. 8, 9a and 9b, is a rod rotatable about its longitudinal axis, which has at least one arc and at least two bends to avoid imbalances. Under an arc is a part of the rod to understand that interferes with a rotational symmetry of the rod.
- helical, helical, propeller-like or the like 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
- 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.
- 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.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009046078A DE102009046078A1 (de) | 2009-10-28 | 2009-10-28 | Vorrichtung zur Druckeinstellung in einer Kammerrakel |
PCT/EP2010/064521 WO2011051072A1 (de) | 2009-10-28 | 2010-09-30 | Druckeinstellvorrichtung eines kammerrakelsystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2493690A1 true EP2493690A1 (de) | 2012-09-05 |
EP2493690B1 EP2493690B1 (de) | 2014-12-17 |
Family
ID=43500034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10759904.5A Active EP2493690B1 (de) | 2009-10-28 | 2010-09-30 | Druckeinstellvorrichtung eines kammerrakelsystems |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120210891A1 (de) |
EP (1) | EP2493690B1 (de) |
CN (1) | CN102802950B (de) |
DE (1) | DE102009046078A1 (de) |
WO (1) | WO2011051072A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVR20120185A1 (it) * | 2012-09-13 | 2014-03-14 | Uteco Converting Spa | Dispositivo di inchiostrazione per macchine da stampa |
US20140261032A1 (en) * | 2013-03-15 | 2014-09-18 | P. Kenneth Deneka | Coating Head for Printers and Coaters |
US11806985B2 (en) | 2015-10-27 | 2023-11-07 | Macarbox S.L.U. | Device for applying a fluid to a roller |
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 |
JP6751447B2 (ja) * | 2016-05-18 | 2020-09-02 | アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated | 真空内のフレキシブル基板の連続処理のための装置、及びそのための方法 |
CN109514991A (zh) * | 2018-12-30 | 2019-03-26 | 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 |
US20220176691A1 (en) * | 2019-04-05 | 2022-06-09 | Bobst Bielefeld Gmbh | Ink supply system |
DE102019123632A1 (de) * | 2019-09-04 | 2021-03-04 | Koenig & Bauer Ag | Behälter zur Bereitstellung von Druckfarbe in einem Farbwerk einer Druckmaschine |
DE102019123631A1 (de) * | 2019-09-04 | 2021-03-04 | Koenig & Bauer Ag | Farbwerk einer Druckmaschine |
DE102019123633A1 (de) * | 2019-09-04 | 2021-03-04 | Koenig & Bauer Ag | 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 |
DE102022114616A1 (de) | 2022-06-10 | 2023-12-21 | Koenig & Bauer Ag | Farbwerk einer Vorrichtung zum Bedrucken von Hohlkörpern |
Family Cites Families (15)
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US1978285A (en) * | 1932-03-11 | 1934-10-23 | Goss Printing Press Co Ltd | Inking mechanism |
US2541395A (en) * | 1947-04-25 | 1951-02-13 | Frank C Wilson | Pressure relief valve |
US3747523A (en) * | 1970-10-15 | 1973-07-24 | Valspar Corp | Method of printing with carbonated ink |
US4643124A (en) * | 1985-05-13 | 1987-02-17 | Ryco Graphic Manufacturing, Inc. | Liquid coating supply system for a printing press blanket coater |
GB8708401D0 (en) * | 1987-04-08 | 1987-05-13 | Vickers Plc | Lithographic printing |
EP0368485A3 (de) * | 1988-10-31 | 1991-01-30 | Seiken Graphics, Inc. | Lithographisches Drucken |
US5088402A (en) | 1990-06-07 | 1992-02-18 | Rockwell International Corporation | Pressurized printing fluid input system for keyless lithographic printing |
DE19548535C2 (de) * | 1995-12-22 | 1999-12-30 | Windmoeller & Hoelscher | Verfahren und Vorrichtung zur Reinigung einer Rakelvorrichtung für ein Spülfarbwerk einer Rotationsdruckmaschine |
DE19757094A1 (de) * | 1997-12-20 | 1999-06-24 | Roland Man Druckmasch | Einrichtung zum Beschichten von Bedruckstoffen in einer Druckmaschine |
US6576059B2 (en) * | 1999-11-22 | 2003-06-10 | Harris & Bruno Company, Inc. | Chambered doctor blade system for water-based and UV-based coatings |
DE10305918A1 (de) * | 2002-03-15 | 2003-10-02 | Heidelberger Druckmasch Ag | Versorgungseinheit für eine Flüssig-Beschichtungsanlage insbesondere einer Druckmaschine sowie Verfahren zu ihrem Betrieb |
ITGE20020033A1 (it) * | 2002-04-24 | 2003-10-24 | Schiavi Spa | Metodo di lavaggio automatico del circuito di inchiostrazione nelle macchine da stampa rotative, ed impianto per l'attuazione di detto metod |
DE10225681B4 (de) * | 2002-06-10 | 2010-02-04 | Windmöller & Hölscher Kg | Verfahren und Vorrichtung zum Zu- und Abführen von Druckfarbe zu und von einer Rakelvorrichtung eines Farbwerks einer Rotationsdruckmaschine und/oder zum Reinigen der Rakelvorrichtung |
DE10236780C1 (de) | 2002-08-10 | 2003-09-25 | Roland Man Druckmasch | Dosiereinrichtung für ein flüssiges Medium in einer Verarbeitungsmaschine |
DE102007021191B4 (de) * | 2007-05-05 | 2010-04-15 | Industrie-Automation Vertriebs-Gmbh | Verfahren und Einrichtung zum Dosieren eines Beschichtungsfluids in einer Verarbeitungsmaschine |
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2009
- 2009-10-28 DE DE102009046078A patent/DE102009046078A1/de not_active Withdrawn
-
2010
- 2010-09-30 CN CN201080048028.2A patent/CN102802950B/zh active Active
- 2010-09-30 EP EP10759904.5A patent/EP2493690B1/de active Active
- 2010-09-30 WO PCT/EP2010/064521 patent/WO2011051072A1/de active Application Filing
- 2010-09-30 US US13/504,603 patent/US20120210891A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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See references of WO2011051072A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102009046078A1 (de) | 2011-05-05 |
EP2493690B1 (de) | 2014-12-17 |
CN102802950A (zh) | 2012-11-28 |
WO2011051072A1 (de) | 2011-05-05 |
CN102802950B (zh) | 2014-12-10 |
US20120210891A1 (en) | 2012-08-23 |
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