EP1864800B2 - Procédé destiné au calcul de paramètres de fonctionnement d'une presse - Google Patents

Procédé destiné au calcul de paramètres de fonctionnement d'une presse Download PDF

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Publication number
EP1864800B2
EP1864800B2 EP07108518.7A EP07108518A EP1864800B2 EP 1864800 B2 EP1864800 B2 EP 1864800B2 EP 07108518 A EP07108518 A EP 07108518A EP 1864800 B2 EP1864800 B2 EP 1864800B2
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EP
European Patent Office
Prior art keywords
printing press
dryer
printing
moisture
air
Prior art date
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EP07108518.7A
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German (de)
English (en)
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EP1864800A3 (fr
EP1864800B1 (fr
EP1864800A2 (fr
Inventor
Jochen Jung
Rolf Müller
Michael Rohleder
Matthias Niedernhuber
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/30—Controlling, e.g. regulating, parameters of gas supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F26B25/004—Handling, e.g. loading or unloading arrangements for articles in the shape of discrete sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects

Definitions

  • the invention relates to a method for determining operating parameters of a printing press, in which the parameters determining the degree of drying of the printing material are determined and used to optimize the drying process.
  • EP 0 025 878 A1 describes an inkjet printer in which the energy consumption and the dwell time of the sheet on the fusing drum are set by a control system that takes color density, color type and ambient humidity into account.
  • the ambient humidity sensor controls the time that the sheet has to stay on the fusing drum before it is allowed to enter the dryer.
  • the known methods and devices are not suitable for solving the problems outlined above.
  • the known methods do not help, particularly in sheet-fed offset printing machines with coating units in which dispersion coatings are applied and dried with hot air or infrared radiation.
  • a printing press suitable for carrying out the method is specified in claim 18.
  • the essential material flows influencing the drying process are determined in the area of the dryer device of the printing press. These material flows are primarily the air humidity of the supply air and the air humidity of the exhaust air of the dryer device as well as the moisture transported with the printing material, primarily the paint application.
  • the moisture balance and thus the degree of dryness of the printing material transported through the dryer can be determined from these parameters, with the reliability of the method also increasing if the material moisture of the printing material itself is determined before and after printing or painting and drying. It is particularly advantageous and helpful for the operating personnel of the printing machine if the essential characteristic data of the material flows determined are visually displayed on a screen.
  • the printing press suitable for carrying out the method therefore has sensors for measuring the essential material flows influencing the drying process as well as a computing unit in which the measured values are prepared or further processed and / or the moisture balance of the material flows can be determined.
  • the relative humidity e.g. B. to measure the supply and exhaust air of the dryer, but the flow of the water actually conveyed in via the supply air and the exhaust air, d. H. the amount of water, the temperature and the volume flow of the incoming and outgoing air is expediently measured in order to determine the amount of water vapor discharged in connection with the relative humidity.
  • This amount of water vapor plus that in the material of the printing sheet, i.e. H. Part of the water thrown into the paper corresponds roughly to the amount of water carried in via the coating when the printing material leaves the dryer with a well-dried coating.
  • Figure 1 shows an offset printing machine 1 in a row design with a feeder 2 in which the unprinted paper stack 3 is located, six printing units 8a to 8f for the four basic colors and optionally two further special colors, a first coating unit 9a, followed by two dryer units 10a and 10b, a second Painting unit 9b and a delivery 5 with the sheet delivery stack 6.
  • a printing machine is offered, for example, under the name Speedmaster XL105-6-LYYLX3 from Heidelberger Druckmaschinen AG.
  • arrows pointing inwards or outwards symbolize the points in the printing press at which moisture is introduced into or discharged from the printing process.
  • the arrow 4 symbolizes the moisture that is already in the printing material sheets stacked in the feeder 2.
  • moisture is understood to mean the material moisture content of the paper, i.e. the amount of water that is bound in the paper per unit of quantity.
  • a material moisture of 8% in the feeder paper stack means that a paper sheet of 100 grams contains 8 grams of water. If the stack of paper is in the "state of equilibrium" with the ambient air in the pressroom after its acclimatization, the equilibrium moisture content can be determined via the sorption isotherms of the paper with knowledge of the relative humidity and temperature of the air in the pressroom. However, such acclimatization of the paper stack in the feeder has often not taken place at all.
  • the printing units 8 are printing units for wet offset, d. H. they have a dampening unit that dampens the printing plate prior to inking, with part of this dampening water reaching the sheet to be printed via the blanket cylinder in the printing unit. This entry of moisture is symbolized by arrow 18.
  • the arrow 13 represents the proportion of water that comes from the ink printed on the sheet itself. This is naturally low with the oil-based offset printing inks.
  • the arrow 12 takes into account that during the transport of the printed sheet through the machine a certain amount of evaporation takes place because the printing unit wetted with ink and dampening solution and the printed sheet are more humid than the surrounding air in the printing machine.
  • the lacquer layers applied to the printed sheet in the lacquering units 19a and 19b at least when it is not UV-curable lacquers, but water-based lacquers such as. B. dispersion paints. This is symbolized with the arrows 19a and 19b.
  • dryer units 10a and 10b and 11a to 11d Another very important exchange of moisture takes place in the dryer units 10a and 10b and 11a to 11d.
  • These dryer units are supplied with air from the environment (arrows 20 and 21) with a relative humidity of approx. 50% prevailing in the pressroom, which is then heated up (in the case of hot air dryers) when it enters the dryer 10a, 10b, 11a to 11d, or for IR radiation dryers when it enters the drying room.
  • the exhaust air should then, if possible, discharge the amount of water contained in the lacquer layer in the form of steam from the dryer units 10 and 11, so that the coated sheets do not block on the stack.
  • the first coating layer should be dried through with the aid of the dryer devices 10a and 10b to such an extent that the coating layer added in the second coating unit 9b is easily overlaid.
  • the second lacquer can also be a UV lacquer that should / must not react with a water-based lacquer that is still damp. But even if the second coating unit is also aqueous dispersion coating, the first coating layer must already be solidified so that the second coating layer, e.g. B. for the production of particularly thick overall paint layers, can be applied without any problems.
  • the amount of paint applied can be adjusted in the printing machine.
  • knowledge of the essential operating parameters, in particular of the dryer units 10a and 10b, as well as the machine speed, can easily achieve an optimal result. To do this, however, it is necessary to know the essential parameters in the moisture balance.
  • a number of sensors are provided in the area of the printing press designated B1, with which these variables can be measured. This is explained below using Figure 3 explained.
  • a humidity sensor 120a and a temperature sensor 120b are arranged in the vicinity of the air inlet ducts 121 for the dryers 10a and 10b.
  • a humidity sensor and a temperature sensor may be sufficient.
  • corresponding humidity sensors 130c and temperature sensors 130d are arranged in the exhaust air duct of dryer 10a and dryer 10b.
  • the amount per unit of time of the moisture flow discharged from the machine can be clearly determined as the difference between the air humidity flowing into the machine and flowing out of the machine again.
  • capacitive sensors, aspiration psychrometers or sensors can be used, for example, which measure the humidity via the absorption of infrared radiation in the water bands.
  • Sensors that measure the relative humidity can also be arranged in a cooled measuring air flow branched off from the exhaust air flow to increase the measuring accuracy. This is because when the air flow is cooled, the relative humidity increases, so that the measured humidity values move into an area where the measurement inaccuracy is lower, provided that there is no condensation of the humidity in the measurement air flow.
  • a suitable measuring cell that prevents the latter is based on the Figure 7 described at the end of the illustration.
  • the amount of water introduced via the paint application is measured with flow sensors 119 in the inflow and return of the paint supply device of the printing press 1.
  • the amount of lacquer or its water content in chamber doctor blade systems can also be derived from the difference in the delivery rates Paint feed pump and paint suction pump are determined. Taking into account the type of paint or its water content, which is usually 60% for dispersion paints, the amount of water introduced at this point can be easily calculated.
  • Another possibility for measuring the amount of paint used is to record the weight or the decrease in weight of the paint storage container with a load cell.
  • sensors are optionally provided with which the already existing water content of the sheet 14 entering the coating unit can be determined more precisely.
  • a sensor 118 is used for this purpose, which determines the dampening solution input 18 from the dampening solution consumption in the six printing units 8a to f.
  • two temperature sensors 114 and 117 are provided which determine the temperature of the sheet entering the coating unit and that of the sheet leaving the dryer 110b. These temperature sensors are used to determine the entry and exit temperatures of the sheets. Building on the moisture balance, an energy balance of the drying process can be drawn in addition to the temperature difference that the material flow experiences.
  • sensors can be used, for example, which measure the temperature of the sheet in a contactless manner via the infrared radiation emitted by the sheet.
  • a mobile electronic measuring device for example a sword sensor or an attachment sensor 103, which works for example on the principle of microwave absorption or conductivity of a hygroscopic electrolyte, can be used.
  • the signals from the sensors are processed in a computing unit 301 ( Figure 5 ), for example a commercially available measuring PC to which the above-mentioned sensors are connected via the appropriate interface adapter.
  • the memory 302 of the computer 301 stores parameters and conversion factors relevant to the drying process, such as the water content of the paint, the mathematical relationships for converting relative humidity ⁇ into absolute humidity, as shown in the Mollier diagram Figure 4 are illustrated, to name a few.
  • the keyboard of the computer is designated by 303 and the screen is designated by 304.
  • the essential characteristics of the current painting and drying process are now graphically presented on this screen as a setting aid for the printing staff.
  • the bar 220 represents a measure of the amount of water flowing into the dryer 10 with the supply air 20
  • the bar 230 indicates the amount of water discharged via the exhaust air. Both are proportional to the air flow F through the dryer, while the bar 230 can also be enlarged within certain limits by increasing the temperature T or the heating power of the hot air dryer or by increasing the thermal radiation of the IR dryer.
  • the possibly still existing "dryer reserve”, i. H. the possibility of further increasing the water content of the exhaust air by increasing the temperature or the IR radiation or the air flow is shown on the display 304 as a further partial bar labeled 240.
  • the next bar 219 describes the amount of water still contained in the applied lacquer layer after subtracting the amount of water entered in the sheet of paper and knocked away. Experience has shown that this is approx. 50 to 60% of the total amount of water applied to the sheet via the coating.
  • a sheet with a dry lacquer layer is obtained when the upper edge of the beam 219 does not or does not significantly exceed the upper edge of the beam 230.
  • the residual moisture of the lacquer layer of the sheet leaving the dryer 10b is shown in a further bar 200.
  • This residual moisture can be reduced on the one hand by reducing the paint application or by reducing the machine speed. This information is given as an aid to the user in the form of corresponding symbols -L and -V with a downward pointing arrow.
  • the residual moisture 200 can also be reduced by increasing the dryer temperature + T or increasing the air throughput + F, which is again symbolized by corresponding symbols on the bar 230.
  • Pop-up menus 306 also serve to display the exact measured values in the supply air or exhaust air duct of the dryer when the bar is approached with the mouse pointer 309.
  • a good drying result for the sheet is obtained if the amount of water applied by the application of varnish in the varnishing unit 19a (100%) is approximately the sum of the amount of water discharged as steam in the dryer (50 to 60%) and the amount of water that is thrown into the paper below the varnish layer ( 40 to 50%).
  • the Speedmaster XL105 printing machine mentioned above operated at the maximum production speed of 18,000 sheets per hour in sheet format 105 cm by 75 cm with a typical wet coating of 3.5 ⁇ m, this corresponds to an F H20 water entry of 29 l / h, of which experience has shown Fold 50% into the paper and so 50% remain in the paint.
  • This empirical value can be determined or verified more precisely if the paper moisture content of the sheet is measured after it has left the dryer or in the waste pile.
  • the dryer units 10a and 10b are expediently operated in such a way that 50% of the water input symbolized by the arrow 19a is largely discharged again in the form of steam by means of the first layer of paint in the two dryers 10a and 10b.
  • the air in the pressroom has a relative humidity of 51% at an ambient temperature of 25 degrees Celsius. This corresponds to a load of 10 grams of water per kilogram of dry air (point A).
  • this supply air is heated to 80 degrees Celsius and then still has a relative humidity of 3.4% (point B). However, this does not change anything about the load with 10 grams of water per kilogram of dry air.
  • the exhaust air extracted from the dryer units 10a and 10b has a temperature of 58 degrees Celsius and a relative humidity of 12.7%. This corresponds to a load of 14.5 grams of water per kilogram of dry air (point C).
  • V 3000 cubic meters of air per hour or 3300 kilograms (dry) air per hour through the dryer units.
  • V 3000 cubic meters of air per hour or 3300 kilograms (dry) air per hour
  • FIG. 6 An alternative way to visualize the measurement results of the sensors is in Figure 6 shown.
  • the part of the printing press 1 containing the dryers 1 0a and b as well as the coating unit 9a is shown and the measured values of the sensors are shown in terms of values, with arrows directly showing the connection between the measuring locations of the sensors and the displayed measured values for the relative humidity RH, temperature T , Pressure p and paint flow rate F L.
  • RH relative humidity
  • T temperature
  • Pressure p Pressure p and paint flow rate
  • F L paint flow rate
  • a balance area B2 for the second coating unit 9b and the dryers 11a to d for the printing machine 1 can also be set up and displayed.
  • the computer 301 can switch the screen display accordingly through appropriate inputs via the keyboard 303 and switch to the sensors arranged in the supply air 21 or exhaust air 31 and measuring the paint flow 19b.
  • the computer 301 has a data line 307 which connects it to the machine control of the printing machine. In this way, changes made interactively on the screen 304 in the heating power or the air volume flow of the dryer, the amount of paint applied and the machine speed can be transferred directly to the machine control and do not have to be made there separately.
  • FIG 7 describes a measuring cell for the more precise measurement of the relative humidity in the exhaust air of the dryer 10a / 10b:
  • the measuring cell has a pot-like or box-shaped housing 401, which has an air inlet nozzle 402 on the bottom and is offset approximately in the middle with respect to the wall of the pot-shaped or box-shaped Housing has an air outlet nozzle 403.
  • the air inlet connector 402 has a much larger cross-section than the air outlet connector 403 in order to ensure that the pressure level in the measuring cell does not change, but rather corresponds to the pressure of the main flow of the dryer exhaust air from which the measurement flow is branched.
  • a coarse grille 404 in the air inlet nozzle prevents foreign bodies from entering the measuring cell.
  • a finer dust filter 405 divides the measuring cell between the air inlet nozzle and the air outlet nozzle. Because of its large diameter, which corresponds to that of the measuring cell, the dust filter 405 does not represent any significant flow resistance. It divides the volume of the measuring cell into an entrance area 415, in which the air still has the temperature and humidity of the main exhaust air flow, and into a measuring volume 416, in which the air is cooled as detailed below and measured with regard to temperature and relative humidity.
  • the cover of the measuring cell is formed by a ring 418 in which a Peltier element 410 is received.
  • the Peltier element is provided with heat sinks on both sides, the heat sink 414 keeping the “hot” side of the Peltier element at ambient temperature, which is supported by a fan 413.
  • Peltier element 410, heat sink 414 and fan 413 form a commercially available structural unit such as is used, for example, for cooling electronic components. Such building units are available relatively inexpensively.
  • the intermediate ring 418 is made of heat-insulating material in order to prevent a thermal short circuit between the two sides of the Peltier element.
  • a grid 406 made of metal rests on the heat sink 407 on the “cold” side of the Peltier element 410.
  • the grating 406 is relatively coarse-meshed and allows air to pass between the measurement volume 416 and the sensor area below.
  • the grid 406 is in thermal contact with the heat sink 407 and therefore assumes its temperature. Due to the very large surface of the heat sink 407 and grille 406, the air passing from the measurement volume 416 through the grille 406 and reaching the sensor 408 assumes the temperature of the heat sink. This is kept at approx. 35 ° C in order to prevent the moisture in the air from condensing out in the area of the sensor.
  • the sensor 408 is an inexpensive, commercially available sensor for measuring the relative humidity and temperature, as it is e.g. B. by the company Sensirion Inc., Westlake Village, California, USA, is sold under the name SHT75. Both values, the value of the relative humidity and the measured temperature value, serve to determine the absolute humidity in the exhaust air of the dryers 10a / 10b, as described with reference to the other figures.
  • the temperature measuring element on the sensor 408 is used to regulate the temperature in the measuring cell to values between approx. 25 ° to 40 ° C. that are uncritical with regard to the condensation of water vapor with the aid of the Peltier element 410. Additional protection against condensation can be achieved by also taking the measurement signal of the relative humidity into account.
  • the temperature in the measurement volume 416 can be increased by using the Peltier element 410 for heating after reversing the polarity of the current.
  • the Peltier element 410 can be controlled and regulated with the aid of the humidity signal and the temperature signal of the sensor 408 so that the sensor always works in a climate range that is uncritical with regard to the condensation of steam, but optimal with regard to the accuracy of the humidity measurement.
  • the invention was described on the basis of a created moisture balance, since when using dispersion varnishes the essential material flows contain water.
  • the entry and discharge of solvents, z. B. the IPA (isopropanol) to balance and to make this balance visually available for optimization by the printer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Drying Of Solid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (34)

  1. Procédé pour la détermination de paramètres de fonctionnement d'une machine à imprimer (1), en particulier d'une machine à imprimer offset à feuilles avec au moins un dispositif de commande, plusieurs groupes à imprimer (8a - 8f) ainsi qu'au moins un groupe de vernissage (9a, b) et au moins un dispositif de séchage (10,11), pour lequel les dimensions (V, T, rF, p) définissant le degré de séchage de la matière imprimée sont déterminées et utilisées pour l'optimisation du processus de séchage, les flux de matière influençant le processus de chauffage étant déterminés pour au moins la zone (B1, B2) de la machine à imprimer (1) qui contient le dispositif de séchage (10 ou 11), caractérisé en ce
    qu'au moins la charge d'humidité de l'air d'amenée (20) et la charge d'humidité de l'air d'échappement (30) du dispositif de séchage (10a, b) sont déterminées.
  2. Procédé selon la revendication 1,
    pour lequel des données caractéristiques essentielles des flux de matière déterminés (19, 20, 30) sont représentés visuellement.
  3. Procédé selon la revendication 1 ou 2,
    pour lequel, en supplément, l'humidité (14, 18) transportée avec la matière imprimée, en particulier celle de la couche de vernis (18), est déterminée.
  4. Procédé selon l'une des revendications 1 à 3,
    pour lequel, en supplément, l'humidité (17) de la matière imprimée quittant le dispositif de séchage (10b) ou la machine à imprimer est déterminée.
  5. Procédé selon la revendication 1 ou 2,
    pour lequel la quantité d'eau amenée par unité de temps dans le dispositif de séchage (10a, b) et/ou la quantité d'eau évacuée par unité de temps sont déterminées.
  6. Procédé selon la revendication 5,
    pour lequel les flux volumiques de l'air d'arrivée (20) et de l'air d'échappement (30) et/ou la quantité (19) du vernis imprimé sont mesurés pour la détermination de la quantité d'eau.
  7. Procédé selon l'une des revendications 1 à 6,
    pour lequel la température (T) de l'air d'amenée (20) et la température de l'air d'échappement (30) du dispositif de séchage (10a, 10b) sont mesurées en supplément.
  8. Procédé selon l'une des revendications 1 à 7,
    pour lequel la température (T) de l'air d'amenée avant et/ou après la traversée du dispositif de séchage (10a, 10b) est déterminée en supplément.
  9. Procédé selon l'une des revendications 1 à 8,
    pour lequel des paramètres essentiels déterminés des flux de matière (14, 17, 19, 20, 30) sont utilisés pour la commande de la puissance de séchage et/ou de la vitesse de machine (v).
  10. Procédé selon l'une des revendications 1 à 9,
    pour lequel un bilan d'humidité pour une plusieurs zones (B1, B2) de la machine à imprimer est déterminé à partir des flux de matière.
  11. Procédé selon la revendication 2,
    pour lequel la représentation (304) des flux de matière s'effectue à l'aide de symboles (219, 220, 230) de grandeur variable.
  12. Procédé selon la revendication 2,
    caractérisé en ce
    que dans la représentation des données caractéristiques des flux de matière, les valeurs de mesure des données caractéristiques et le lieu de mesure sont représentés.
  13. Procédé selon l'une des revendications 2 à 12,
    caractérisé en ce
    que dans la représentation des données caractéristiques, des divergences au moins partielles de valeurs de consigne sont affichées.
  14. Procédé selon l'une des revendications 1 à 12,
    pour lequel la machine à imprimer présente plusieurs dispositifs de séchage (10a, b; 11a - d) et des flux de matières partiels (30, 31) sont déterminés pour les différents dispositifs de séchage.
  15. Procédé selon l'une des revendications 2 à 14,
    caractérisé en ce
    que dans la représentation des données caractéristiques, des valeurs limites sont affichées, à l'intérieur desquelles le processus de séchage travaille de manière stable.
  16. Procédé selon l'une des revendications 1 à 12,
    caractérisé en ce
    que la courbe des données caractéristiques mesurées des flux de matière est protocolée.
  17. Procédé selon la revendication 1 ou 2,
    pour lequel la machine à imprimer possède au moins un groupe de vernissage (9a, 9b) pour vernis de dispersion, et un dispositif de séchage thermique (10, 11),
    et au moins l'humidité de l'air étant mesurée dans l'air d'échappement du dispositif de séchage.
  18. Machine à imprimer, en particulier machine à imprimer rotative à feuilles (1) avec au moins un dispositif de commande associé à cette dernière, plusieurs groupes à imprimer (8a-d) ainsi qu'au moins un groupe de vernissage (9a, b) et au moins un dispositif de séchage (10a, b ; 11a-d) ainsi que des capteurs (117, 118, 119, 130, 106, 103) pour la mesure des grandeurs déterminant le processus de séchage de la matière à imprimer, caractérisée en ce que le dispositif de séchage (10a, b) est associé à des capteurs (117, 118, 119, 130, 106, 103) pour obtenir des valeurs de mesure afin de déterminer les flux de matière essentiels influençant le processus de séchage, et en ce qu'une unité informatique (301) est prévue, dans laquelle les valeurs de mesure des capteurs sont traitées pour déterminer les flux de matière,
    caractérisée en ce
    que des capteurs (120a, 130a) sont prévus pour la détermination de la charge d'humidité de l'air d'amenée (20) et de l'air d'échappement (30) du dispositif de séchage (10a, b).
  19. Machine à imprimer selon la revendication 18,
    caractérisée en ce
    qu'un dispositif d'affichage (304) est relié à l'unité informatique (301), sur lequel des données caractéristiques des flux de matière déterminés sont visuellement représentables.
  20. Machine à imprimer selon l'une des revendications 18 à 19,
    pour laquelle au moins un capteur (118) est prévu pour la mesure de la quantité de vernis imprimée par unité de temps.
  21. Machine à imprimer selon l'une des revendications 18 à 20,
    caractérisée par
    au moins un capteur (103, 118, 106) mesurant l'humidité de la matière imprimée transportée dans le dispositif de séchage et/ou quittant l'unité de séchage.
  22. Machine à imprimer selon l'une des revendications 18 à 21,
    caractérisée par
    un programme informatique pour l'ordinateur (301) en vue de la détermination de la quantité d'eau amenée dans et évacuée et hors de l'unité de séchage (9a, b).
  23. Machine à imprimer selon l'une des revendications 18 à 22,
    caractérisée par
    au moins un capteur (130b) pour la détermination du flux volumique de l'air d'arrivée et/ou de l'air d'échappement du/des dispositif(s) de séchage.
  24. Machine à imprimer selon l'une des revendications 18 à 23,
    caractérisée par
    des capteurs de température (120b, 130d) pour la détermination de la température du flux d'air d'amenée et du flux d'air d'échappement du/des dispositif(s) de séchage.
  25. Machine à imprimer selon l'une des revendications 18 à 24,
    caractérisée par
    des capteurs de température (114, 117) pour la détermination de la température de la matière imprimée avant et après la traversée du/des dispositif(s) de séchage.
  26. Machine à imprimer selon l'une des revendications 18 à 25,
    caractérisée par
    une connexion de données (307) entre l'unité informatique (301) et la commande de la machine à imprimer.
  27. Machine à imprimer selon l'une des revendications 18 à 25,
    pour laquelle l'unité informatique fait partie de la commande de la machine à imprimer.
  28. Machine à imprimer selon l'une des revendications 18 à 27,
    pour laquelle le dispositif d'affichage fait partie du pupitre de commande de la machine à imprimer.
  29. Machine à imprimer selon l'une des revendications 18 à 28,
    pour laquelle la machine à imprimer présente plusieurs dispositifs de séchage (10a, b; 11a - d) et chacune des unités de séchage (10a, b) est associée à un capteur séparé pour la mesure de l'humidité de l'air d'échappement.
  30. Machine à imprimer selon la revendication 29,
    pour laquelle chaque unité de séchage (10, 11) est associée à un capteur de température séparé.
  31. Machine à imprimer selon l'une des revendications 18 à 19,
    pour laquelle la machine à imprimer présente au moins un groupe de vernissage (9a, 9b) pour vernis de dispersion et un dispositif de séchage thermique (10a, 10b, 11a à 11d), et au moins un capteur pour la mesure de l'humidité de l'air d'échappement étant disposé dans le canal d'air d'échappement du dispositif de séchage (10, 11).
  32. Machine à imprimer selon l'une des revendications 18 ou 31,
    pour laquelle le capteur (130c, d) est disposé pour la mesure de l'humidité du flux d'air d'échappement dans un flux d'air de mesure refroidi.
  33. Machine à imprimer selon la revendication 32,
    caractérisée par
    une cellule de mesure (401) avec un élément Peltier (410) pour le refroidissement d'un flux d'air de mesure dérivé du flux principal d'air, le capteur d'humidité (408) étant disposé ensemble avec un capteur de température dans la cellule de mesure (401).
  34. Machine à imprimer selon la revendication 31, avec un dispositif d'affichage pour la représentation de l'humidité ou de la quantité d'eau évacuée par l'air d'échappement.
EP07108518.7A 2006-06-09 2007-05-21 Procédé destiné au calcul de paramètres de fonctionnement d'une presse Active EP1864800B2 (fr)

Applications Claiming Priority (2)

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DE102006026957 2006-06-09
DE102006041721A DE102006041721A1 (de) 2006-06-09 2006-09-06 Verfahren zur Ermittlung von Betriebsparametern einer Druckmaschine

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EP1864800A2 EP1864800A2 (fr) 2007-12-12
EP1864800A3 EP1864800A3 (fr) 2008-04-09
EP1864800B1 EP1864800B1 (fr) 2011-07-20
EP1864800B2 true EP1864800B2 (fr) 2020-11-18

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EP (1) EP1864800B2 (fr)
JP (1) JP2007331393A (fr)
CN (1) CN101085568B (fr)
AT (1) ATE516957T1 (fr)
DE (1) DE102006041721A1 (fr)

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Publication number Publication date
ATE516957T1 (de) 2011-08-15
JP2007331393A (ja) 2007-12-27
CN101085568B (zh) 2010-12-01
CN101085568A (zh) 2007-12-12
EP1864800A3 (fr) 2008-04-09
EP1864800B1 (fr) 2011-07-20
US20070283827A1 (en) 2007-12-13
DE102006041721A1 (de) 2007-12-13
EP1864800A2 (fr) 2007-12-12
US7954431B2 (en) 2011-06-07

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