EP0893252A2 - Dispositif pour ajuster la tension de la bande après un dispositif refroidisseur dans une machine à imprimer - Google Patents

Dispositif pour ajuster la tension de la bande après un dispositif refroidisseur dans une machine à imprimer Download PDF

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Publication number
EP0893252A2
EP0893252A2 EP98112722A EP98112722A EP0893252A2 EP 0893252 A2 EP0893252 A2 EP 0893252A2 EP 98112722 A EP98112722 A EP 98112722A EP 98112722 A EP98112722 A EP 98112722A EP 0893252 A2 EP0893252 A2 EP 0893252A2
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EP
European Patent Office
Prior art keywords
web
dancer roller
nip
rollers
dancer
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
Application number
EP98112722A
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German (de)
English (en)
Other versions
EP0893252A3 (fr
EP0893252B1 (fr
Inventor
Robert Richard Murray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Filing date
Publication date
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Publication of EP0893252A2 publication Critical patent/EP0893252A2/fr
Publication of EP0893252A3 publication Critical patent/EP0893252A3/fr
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Publication of EP0893252B1 publication Critical patent/EP0893252B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • 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
    • B41F23/0476—Cooling
    • B41F23/0479—Cooling using chill rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/192—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web motor-controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/31—Features of transport path
    • B65H2301/311—Features of transport path for transport path in plane of handled material, e.g. geometry
    • B65H2301/3112—S-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • B65H2511/112—Length of a loop, e.g. a free loop or a loop of dancer rollers

Definitions

  • the present invention relates to a voltage control system, particularly one Device for regulating the tension of a material web in one Cooling device in a printing machine subsequent area, according to the generic term of claim 1.
  • a continuous paper web is passed through the machine guided.
  • the web moves through various components of the press and is guided over driven rollers and free-running rollers, the driven rollers provide the driving force and the free running or guide rollers for the position, guidance and direction of the train.
  • a web press usually includes a plurality of processing units, such as printing units, a drying unit, a cooling unit and a slitter unit.
  • processing units such as printing units, a drying unit, a cooling unit and a slitter unit.
  • each printing unit prints its own color on the Train.
  • z. B. a first printing unit Black, a second cyan printing unit, a third magenta printing unit and a fourth Yellow printing unit.
  • the web moves through the nip of each printing unit from one printing unit to another. After the web passes the nip of the last Has left the printing unit, it moves through the pull rollers at the entrance of a subsequent processing unit, e.g. B. a cooling unit.
  • a pair of traction rollers comprises a pair of cylindrical rollers, which with their axes in the are arranged substantially parallel to each other.
  • the peripheral surfaces of the drawing rollers are in rolling contact with each other and the material web moves between the Pull rollers through on a path that is approximately perpendicular to the plane of the two parallel axes of the rollers.
  • the surface speed of the web is almost identical to the peripheral speed of the drawing rollers.
  • the tension builds up in the web and can slip between the Cause rollers and the web. If the tension is high enough, it can be one Break or break, in this case the printing machine must be switched off, to remove the torn parts of the web and the web has to go through the Printing machine run, resulting in costly downtime and loss of work leads.
  • the cooling unit is that first unit in which the web comes into contact with a nip after it has moved out of the machine dryer.
  • the purpose of the cooling unit is to cool the heated web before it is in the folder the printing press is processed further.
  • the cooling unit includes a variety of Cooling rollers, over which the web is guided to cool the web.
  • the last of the Cooling rollers together with another roller form a pair of pull rollers at the exit the cooling unit. Since the dryer usually does not have a pair of draw rollers, it is one Another purpose of the cooling unit is to pull the web through the drying unit.
  • a series of fixed guide rolls is usually between the draw rolls at the exit of the cooling unit and the pull rollers at the entrance of the slitter arranged. These guide rollers rotate freely around fixed axes and become driven by the contact of the guide rollers with the web.
  • a disadvantage of this embodiment is that the guide rollers relax the Only allow the web to slip between the guide rollers and the web. To this In this way, only a limited amount of tension can be released.
  • Another disadvantage is that guide rolls are not suitable to create the sag of a web eliminate.
  • dancer rollers To regulate tension and sag in the web were behind the Infeed unit used by offset printing machines dancer rollers. This regulates it Infeed unit, which is located between the roll stand and the first printing unit, the web is fed into the first printing unit in such a way that the web with the correct Tension enters the first printing unit. There are dancer rolls between that Roll stand and the infeed mechanism provided to keep a constant web tension behind the infeed unit, or there are dancer rollers between the infeed unit and the first printing unit provided to a constant web tension on the first Get printing unit. However, dancer rolls are not usually used in the Cooling unit downstream area of a printing press used because of this negative effects on the cutting register or the length of the in the folder generated signatures are feared.
  • the cutting register regulation concerns the Regulation of the speed and position of the web, especially in relation to the position of the print image to signatures in the unprinted area to cut.
  • a dancer roller causes dynamic changes in the path length of the Train. If a dancer roll is placed downstream of the printing units, then changes the path length of the web on which an image was printed, which in turn increases Difficulty in maintaining the cutting register.
  • the object is to be achieved during a sag of the web to avoid starting up the printing press.
  • an adjustable positionable dancer roller with an air cylinder is connected and the web downstream of the drawing rollers on Exit of the cooling unit and before a next pair of pull rollers, e.g. B. the pull rollers at the entrance of the slitter.
  • the air cylinder acts on the Dancer roller with a constant force, while a control device that with the Air cylinder and the next pair of draw rollers is connected, the position of the Dancer roll monitored.
  • the one Slack in the web indicates the speed by the control device of the next pair of pull rollers to eliminate the slack.
  • the Dancer roll along an arc with a radius that is essentially two parallel lever arms is determined, with at each end of the axis of rotation Dancer roller is a lever arm with one end rotatably attached. The other The end of each lever arm is rotatably connected to the machine frame.
  • Two in substantially parallel air cylinders are rotatably connected to the dancer roll, and an air cylinder with one end at each end of the axis of rotation Dancer roller.
  • the other end of each air cylinder is at a different location on the Frame rotatably attached.
  • One embodiment sees a 90 ° angle between that Lever arm and the air cylinder, under which both with the axis of rotation of the Dancer roller are connected.
  • this embodiment provides that the dancer roller along a Arc moves, the radius of which is the lever arm, while the air cylinder in response apart on the forces exerted by the web on the dancer roller and be brought together.
  • Another advantageous embodiment provides that the arc on which the dancer roll moves is in a substantially horizontal Level lies. Such a construction also contributes to minimizing the Effect of gravity on the mass of the dancer roller.
  • the Dancer roller essentially straight or linear.
  • the linear path is two in given essentially parallel air cylinders, with at each end of the An air cylinder is attached with one end to the dancer roller.
  • the other end of the respective air cylinder is attached to the machine frame so that the air cylinder can't turn. This will essentially force the rod of the air cylinder straight forward and backward, resulting in a linear movement of the Dancer roll results.
  • the dancer roller can also be used on both ends Frame fixed movable supports to be mounted to their linear movement facilitate. It is also conceivable that using movable supports for Guiding the linear movement of the dancer roller different arrangements with one or more air cylinders are possible to move the dancer roller influence.
  • the air cylinder and the Dancer roller in a neutral position when the speed of the out Cooling unit emerging part of the web at the speed of in the Longitudinal cutter entering part of the web matches.
  • one Speed difference between the web part emerging from the cooling unit and The air cylinder becomes the part of the web entering the slitter extended or retracted as needed to position the dancer roller change and maintain a constant tension in the web.
  • the change in Position of the dancer roll is detected by the control unit, the speed of the pull rollers arranged at the entrance of the slitter are increased accordingly or decreased. Changing the speed of the pull rollers at the entrance of the Longitudinal cutter brings the dancer roller back into its neutral position.
  • the dancer roller remains in its neutral position, the speed of out of the right Cooling unit emerging web part essentially at the speed of in the Longitudinal cutter entering web part.
  • the cutting register can continue after reaching a correct speed if necessary be readjusted.
  • the present invention relates to a device for controlling the voltage in the web running through a printing press.
  • FIG. 1 shows a conventional printing press with a roll stand 100, a Infeed unit 200, a first printing unit 300, a second printing unit 400, one third printing unit 500, a fourth printing unit 600, a drying unit 700, a Cooling roll stand 800 and a folder 900.
  • a paper roll 110 of which the Web 120 is withdrawn, is in the roll stand 100.
  • the web 120 moves from the roller stand 100 to the feed unit 200, from where they continue through one Inlet nip and moved around a dancer roller, not shown. From there the web 120 moves into the first printing unit 300, which e.g. B. the color black the web prints, and on to the second printing unit (which prints cyan), the third Printing unit 500 (which prints magenta) and into the fourth printing unit 600 (the yellow prints).
  • the web 120 After leaving the fourth printing unit 600, the web 120 enters the Drying unit 700, wherein it is dried by supplying heat. Since the Web 120 stretches or shrinks in length due to heating and moisture loses, the tension of the web after exiting dryer 700 and Change 800 before entering the chill roll stand.
  • the chill roll stand 800 includes a plurality of chill rolls that pull the web out of dryer 700 and cool at the same time as the web passes between the chill rolls emotional.
  • the individual cooling rollers are driven simultaneously, which z. B. by a Belt drive system is done. Should the web 120 yield or give due to a imprecise absorption by the cooling rollers can be longer, so the dryer can Blow excess web into an arcuate path and thus the correct one Maintain tension in the web. Because the web tends to move through shrinking the cooling rolls, the tension in the web can also change again.
  • the web moves after leaving the Pull rollers at the exit of the cooling unit by a variety of guide and control rollers, before moving between the pull rollers at the entrance of the slitter in Folder 900 moved through.
  • the guide and control rollers can, for. B. used to steer the web, apply silicone to the web or that To control the cutting register or the cutting length.
  • guide rollers can do not fix the condition of a limp web and offer only very limited Opportunities when it comes to reducing web tension.
  • the dancer roller device includes a dancer roller with respect to the printing unit is mounted in such a way that it is moved relative to the printing unit can, and furthermore has a force compensation element, for example an air cylinder, which exerts an essentially constant, position-dependent force through which the Dancer roller is kept in contact with the web.
  • a force compensation element for example an air cylinder
  • Fig. 2 shows a side view of a cooling unit of the printing press downstream Area with a dancer roller device according to a first embodiment of the The present invention.
  • the web 120 moves around a series of driven ones Cooling rolls 2, 3, 4, 5 and 6 which cool the web 120.
  • Lane 120 joins the Cooling roller 2 into the cooling unit and moves around rollers 3, 4 and 5 and between the nip formed by the cooling roller 6 and the pull roller 7 on Cooling unit exit through.
  • the web 120 passes a guide roller 8, one Dancer roll 20 and a guide roll 50 before moving into a downstream Processing unit, e.g. B. in the nip 9 at the entrance of the slitter emotional.
  • the dancer roller 20 is with its axis on the air cylinder 30 and on one Lever arm 40 attached.
  • the air cylinder 30 is at its first end with the Dancer roller 20 and with its second end rotatable with the machine frame connected.
  • the lever arm 40 is at its first end with the dancer roller 20 and its second end rotatably connected to the machine frame. This Configuration ensures that the dancer roller 20 along with an arc a radius that corresponds to the length of the lever arm and at which the Center or the fulcrum at a point where the lever arm with the Frame is connected.
  • the air cylinder 30 stretches and retracts like this from the application of force the web 120 is determined on the dancer roller 20.
  • the air cylinder 30 is with a constant pressure (P) applied to a certain force or load generates the same as the pressure (P) multiplied by the working area (A) of the cylinder is.
  • This specific force (PA) compensates for that from the web 120 on the Dancer roller 20 exerted force, so that the dancer roller 20 in a neutral position is held when the web is not under tension or slack. There are not any resulting forces on the dancer roll, d. that is, the forces are balanced are and therefore no acceleration of the dancer roller occurs.
  • the air cylinder 30 moves in such a way that a corresponding movement of the dancer roller 20 sags the web 120 eliminated and the web load increased again to the predetermined level. If if the web load increases, the air cylinder moves in the opposite direction, so that a corresponding movement of the dancer roll 20 the web load on certain measure reduced.
  • a position sensor 60 is connected to the lever arm 40 and a control unit 90.
  • the control unit 90 preferably controls based on the position of the lever arm 40 the speed of the pull rollers 9 at the entrance of the slitter.
  • the position sensor 60 attached to the lever arm 40 detects any deviation of the Dancer roller 20 from the neutral position and sends a deviation value 95 to the Control unit 90.
  • the position sensor 60 can e.g. B. be designed so that it Deviation values between 0.0 and -10.0 for a corresponding incremental Moving the air cylinder between, for example, approx. 0 to -5 cm (0 to -2 inches) or about 0 to -10 cm (0 to -4 inches); and that he has deviation values between 0.0 and +10.0 when the air cylinder moves apart incrementally between, for example, about 0 to 5 cm (0 to 2 inches) or about 0 to 10 cm (0 to 4 inches) returns.
  • the real ones Movement of the dancer roller 20 depends on the physical dimensions of the Device related to the system applied to it. It can be a Transducer (LVDT) is provided to convert a linear voltage into a distance to be the deviation value 95 based on the position of the dancer roller 20 deliver.
  • LVDT Transducer
  • other sensors can of course also be used for this purpose be used.
  • the Deviation value 95 can be any suitable control signal, such as. B. an analog Voltage, an impedance, a digital value or other signals which the Control unit 90 can be supplied with or without additional signal conditioning.
  • control unit 90 increases or decreases the speed of the pull rollers 9 am Input of the slitter at a speed that is necessary to get the To move dancer roll 20 back to its neutral position. This can Cutting register in the downstream cross cutter, especially during startup the printing press are essentially maintained.
  • control unit 90 can adjust the speed of the pull rollers 6, 7 am Increase or decrease the cooling unit output to achieve a similar result, d. H. to move the dancer roll 20 back to its neutral or home position.
  • control unit 90 can control the speed of a or both pull rollers 6, 7 at the exit of the cooling unit or the pull rollers at Increase or decrease the input of the slitter to get the dancer roller 20 back in to move their neutral position.
  • the position of the dancer roller 20 is related to the amount of paper moved through the nips over a period of time.
  • equation (5) not an accurate representation and equation (1) must be used.
  • a lightweight, fast-acting air cylinder 30 eliminates any cyclic voltage change below a preselected cutoff frequency.
  • the clipping frequency is determined by the physical properties of the Dancer roller device, such as the spring constant and the damping constant of Air cylinder 30 and the mass of the dancer roller determined.
  • the physical properties of the Dancer roller device such as the spring constant and the damping constant of Air cylinder 30 and the mass of the dancer roller determined.
  • the Operating mode 1 does not result in any significant movement of the position of the dancer roller 20 detected.
  • a still movable dancer roller 20 is required to absorb the changes in length ⁇ 1 generated in the path 120. If the Tension in the path is constant, ⁇ 1 represents the cumulative deviation of the two speeds of the rolls, as shown in Equation 4.
  • the voltage is normally stabilized by balancing the forces acting on the dancing roller 20.
  • the mass must be accelerated and the tension is not stable.
  • the speed of the pull rollers 6, 7 at the exit of the cooling unit does not optimally match the speed of the pull rollers 9 at the input of the slitter with regard to the web tension, with the result that the dancer roller 20 moves considerably.
  • the web tension control functions primarily due to the ability of the dancer roll 20 to maintain positive contact with the web 120 and to produce a tight, ie non-sagging web.
  • transitional periods only the transport difference, ⁇ 2 r 2 - ⁇ 1 r 1, is important and the tensile load on the web 120 contributes very little to the position of the dancer roller 20.
  • FIG. 3 shows a side view of the region of the cooling unit following Printing machine with a dancer roller device according to a second Embodiment of the present invention.
  • web 120 moves around a dancer roller 20 attached to an air cylinder 30.
  • the air cylinder 30 is firmly attached in the machine frame so that the rod of the air cylinder in can be extended and retracted substantially in a straight line around the dancer roller 20 to follow an essentially linear path.
  • the air cylinder 30 travels in response to the the web tension exerted forces and thus reduces the tension to prevent this from increasing to a level that will lead to a web break can.
  • the control unit 90 which the deviation signal, the position of the Dancer roller 20 represents, receives as input, reduces the speed of rotation Pull rollers 9 at the entrance of the slitter to the dancer roller 20 in its neutral Bring position back.
  • the air cylinder 30 contracts along its linear path when the Tension in the web 120 below a predetermined load value of the Air cylinder 30 falls. This pulling back or pulling together becomes one maintain positive tension in the web and sag in the web to effective Way eliminated.
  • the control unit 90 which is the retracted position of the Dancer roller 20 used as input increases the speed of rotation of the pull rollers 9 at the entrance of the slitter to the dancer roller 20 in its neutral position bring back.
  • the dancer roller 20 can be provided with a guide frame 36 be connected.
  • the guide frame 36 includes air cylinders 30 attached thereto provide an urging force that the dancer roller 20 contacts the web 120 holds.
  • the guide frame 36 is constructed so that it is in linear rails 35th can move to facilitate the linear movement of the dancer roller 20.
  • FIG. 5 shows a side view of the region of the cooling unit following Printing machine with a dancer roller device according to a third embodiment of the present invention.
  • the dancer roll 20 is at the free end of a Air cylinder 30 attached.
  • the Air cylinder 30 attached to the frame of the printing press in such a way that the rod the air cylinder is retracted and extended substantially in a straight line to the To guide the dancer roller on its linear path.
  • the linear ones shown in Fig. 4 Rails 35 and the guide frame 36 can advantageously also on the Construction of Fig. 5 can be applied.
  • the air cylinder 30 in the Contrary to the second embodiment in response to a decrease in Web tension extended to a positive tension in web 120 and to prevent sagging in the web.
  • the control unit 90 increases the rotational speed of the Pull rollers at the entrance to the slitter in response to the extension of the Air cylinder 30 and reduces the speed of rotation of the drawing rollers 9 at the entrance of the slitter in response to the retraction or contraction of the Air cylinder 30.
  • dancer roll 20 was previously described as being attached to an air cylinder 30 other mechanisms for applying force to the web can also be used become.
  • So z. B. springs or depending on the radii of rollers Masses to generate a dynamically changing range of Positions acting force can be used to act on the dancer roller.
  • the control unit 90 controls the rotational speed of the one forming an inlet gap Pull rolls or the pull rolls forming an outlet nip to the tension in the Regulate and close the web, in particular while the printing press is starting up ensure that the web sags in this operating condition with certainty is excluded.
  • An algorithm to control the sag of the web takes into account e.g. B. a web span of a length l between an inlet gap and an outlet gap.
  • the outlet gap has z. B. an outflow increase of 0.5%.
  • the track section has a maximum tensile load of 0.1%, a speed v, and a certain amount of unstretched paper s (0).
  • the length of the incoming paper is given by multiplying the web speed (v) by the time (t), or vxt.
  • the length of the paper running out of the outlet gap with 0.5% increase is 1.005 vx t.
  • the amount of unstretched paper s (t) jammed at time t is equal to the original amount of slack paper, s (0), plus the amount of paper received minus the amount of paper leaked, as shown in the following equation:
  • a web span length l of approximately 8 m (25 feet) and a web speed v of approximately 457 m / min are used only for the purpose of discussion and not to limit the invention. (1500 fpm) or 7.6 m / sec. (25 feet / sec.) Assumed. Under these circumstances it may seem that the time in which a tensile load of 0.001 develops is given by the following linear relationship:
  • the strain to be developed for a tensile load of 0.1% in a 7.6 m (25 feet) span would be 0.001 by 7.6 m (25 feet) or 0.0076 m (0.025 feet) or 7.6 mm (0.3 inches) ). If at the time a 7.6 mm (0.3 inch) stretch occurs, the increase in the exit gap is reduced to the level at which the stretch is maintained, the tensile load remains at 0.1%. This increase would be a value of 0.001. However, if the web 120 enters the inlet gap 6, 7 with the correct tensile load and the tensile load of the web span is 0.001, then the speed at the outlet gap 9 must match the speed in the inlet gap 6, 7, so that no additional tensile load develops.
  • the increase in the outlet gap must be reduced to below 0.001 in order to achieve the tensile load of 0.1%.
  • This fairly complex process is usually accomplished in web-fed printing presses by allowing slippage between the high growth draw roll (nip 9 in this case) and web 120 at the load level to be maintained. If separate drives are used on the nips, the Transitional growths "should be set with care, as the There may or may not be a natural, nonlinear "transition to slip. This can cause confusion when trying to optimize the response behavior of the drive control unit.
  • the time in which a tensile load of 0.001 in a web span is a length corresponding to the pure numerical value of the web speed (e.g. 7.6 m at 7.6 m / s), 0.22 or more seconds, which is due to the time constant, l / v and the increase is determined.
  • the first mechanism is based on the difference between infeed web speed and outfeed web speed under constant web tension.
  • the second mechanism is an exponential change in tensile load change due to a change in the tensile load of the incoming web and the tensile load the expiring web.
  • control unit To maintain a straight path, the control unit must be in such a System in which the web wraps around the dancer roller by 180 °, the movement of the Grab the dancer roll and multiply by two to get s. Instructs however Slip gap has a slip of 0.5% and the goal is only that Take up slack, then the control unit need not be active.
  • the integrated increment removes 2.5 cm (1 inch) per 0.667 seconds (at 0 "tensile load) and then after another 0.22 seconds sets the tensile load to 0.1%.
  • this weightless dancer roller would have returned to its zero position, the path would be straight and exactly 7.6 m (25 feet) and would not trap the dancer roll and the tensile load would begin to develop to its final value of 0.1%
  • such a dancer roll device could not correct excessive tensile load, ie a tensile load greater than 0.1%, because there is no way to remove paper from the straight path, only the slip gap can do this.
  • the natural frequency of the vibration for this simple spring-mass system is about 7 Hz. Thus, for the occurrence of a complete vibration 0.14 seconds required.
  • a control unit according to the invention can be used for this purpose be designed so that the average position is fixed and that the dancer roller for can move a reasonable distance for short periods.
  • the control unit according to the invention preferably controls only that Difference between the inlet nip and the outlet nip to slowly move the dancer roller 20 back to its zero position. However, this is slow speed higher than the one set by the spout increase of 0.5% lower limit, i.e. H. not less than about 2.5 cm (1 inch) in 0.75 seconds.
  • the Speed must therefore be high enough to prevent the dancer roller 20 reaches its maximum movement point. For the sake of simplicity and if it is allow low dynamic requirements (e.g. a movement of approx. 3.8 cm / sec.
  • the control unit regulates the increase in such a way that it increases in Range is from + 0.5% to -0.5%, so that in combination with an integrated mechanical increase of 0.5% with low web tension or with no tension
  • a doubling of the total growth (integrated mechanical growth plus growth of the control unit) occurs, the z. B. in the area can be from 0.0 to 1.0%.
  • the inlet roller nip and the outlet roller nip can be used be matched to the same nominal speed, d. that is, the Outlet has no integrated growth.
  • a Amount that holds the dancer roller in the neutral or neutral position on average be added to or subtracted from the nominal speed. This would e.g. B. be referred to as an integral controller. Because the extent of the movement of the Dancer roller is a sign of the error size of the existing tensile load can the increase can be regulated in order to increase the correction factor accordingly.
  • a constant force developing device e.g. B. a pair of air cylinders 30 on each side of the dancer roll 20 can place the dancer roll against the web 120 almost at any time. The only time when the dancer roller 20 is not in line with the web 120 can occur when the dynamic vibrations of the dancer roller 20 z. B. would completely loosen the tensile load on the web during a roll change, so that the web no longer abuts the dancer roller. Regarding the physical parameters in the example described, vibrations of approximately 0.127 cm (0.05 inch) could produce such a result. However, the high damping rate of the cylinders and the friction occurring in the rotating components ensure that this does not happen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
EP98112722A 1997-07-24 1998-07-09 Dispositif pour ajuster la tension de la bande après un dispositif refroidisseur dans une machine à imprimer Expired - Lifetime EP0893252B1 (fr)

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EP0893252A2 true EP0893252A2 (fr) 1999-01-27
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201429A2 (fr) * 2000-10-24 2002-05-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé et dispositif refroidisseur pour une bande de matériau

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19918130A1 (de) * 1999-04-21 2000-10-26 Heidelberger Druckmasch Ag Kühl- und Befeuchtungseinheit für Rotationsdruckmaschinen
JP3032763B1 (ja) * 1999-06-17 2000-04-17 株式会社東京機械製作所 輪転機におけるウエブ紙走行張力制御装置を備えた給紙部
JP3713165B2 (ja) * 1999-07-12 2005-11-02 富士ゼロックス株式会社 連続媒体印刷装置
US6325322B1 (en) * 1999-10-06 2001-12-04 Presstek, Inc. Dual-plate winding mechanism with tension adjustment
EP1342685B1 (fr) * 2002-03-08 2013-07-03 Komori Corporation Procédé de commande d'un appareil pour régler la position de coupe sur une bande et dispositif pour sa mise en oeuvre
US20040045996A1 (en) * 2002-09-06 2004-03-11 Lamothe Richard P. Web outfeed processing system for high performance printer
DE102004040886A1 (de) * 2004-08-24 2006-03-02 Volkswagen Ag Bedienvorrichtung für ein Kraftfahrzeug
DE102005058953B4 (de) * 2005-12-09 2008-08-07 OCé PRINTING SYSTEMS GMBH Verfahren und Vorrichtung zum Erfassen der Differenzgeschwindigkeit zwischen einem Bildträger und einem Trägermaterial
DE102007062454A1 (de) * 2007-12-22 2009-07-02 Robert Bosch Gmbh Verfahren zur Regelung einer Bahnspannung und/oder eines Registers
KR101000826B1 (ko) 2008-09-25 2010-12-14 건국대학교 산학협력단 고속 롤투롤 시스템의 펜듈럼 덴서를 사용한 장력제어 방법
EP2848399B1 (fr) * 2013-09-13 2017-09-13 Tetra Laval Holdings & Finance SA Unité et procédé permettant de mettre en oeuvre une première puis une deuxième opération sur une bande
CN104097974B (zh) * 2014-07-07 2017-12-01 广州市高晟染整设备有限公司 精密智能卷绕机气动来料缓冲、拉力调节系统及控制方法
KR102096904B1 (ko) * 2019-11-25 2020-04-03 이운학 평면 스크린 날염기 및 이를 이용한 날염방법

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556510A (en) * 1968-08-21 1971-01-19 Harris Intertype Corp Automatic web tension and register control
DE1761432B1 (de) * 1968-05-18 1971-07-29 Roland Offsetmaschf Vorrichtung zum konstanthalten der spannung einer durch eine druckmaschine laufenden werkstoffbahn
EP0223405A1 (fr) * 1985-10-24 1987-05-27 Harland Crosfield Limited Appareil de mise en registre
DE3906043A1 (de) * 1988-03-21 1989-10-05 Polygraph Leipzig Verfahren und anordnung zum aufbauen der bahnspannung vor dem anfahren
US4945293A (en) * 1989-09-18 1990-07-31 Integrated Design Corp. Web tension control system
WO1990015715A1 (fr) * 1989-06-14 1990-12-27 Quad/Tech, Inc. Systeme et methode de controle de la position angulaire d'une tige et systeme de controle de la tension et du tirage pour une presse d'imprimerie
DE4029927A1 (de) * 1989-10-17 1991-05-02 Zirkon Druckmaschinen Gmbh Einrichtung zum regeln der bahnspannung in einer rollenrotationsdruckmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032245A (en) * 1960-04-25 1962-05-01 Gravure Res Inc Apparatus for controlling web tension
US3975559A (en) * 1973-07-12 1976-08-17 The Standard Register Company Method for producing a business form article
US4366753A (en) * 1980-04-11 1983-01-04 Baldwin Korthe Web Controls, Inc. Circumferential registration control system
US4452140A (en) * 1981-02-19 1984-06-05 Crosfield Electronics Limited Printed web registration control apparatus
DD244105A1 (de) * 1985-12-13 1987-03-25 Hank Dietrich Dr Ing Sicherheitsvorrichtung zum steuern einer rollenrotationsdruckmaschine
US5129568A (en) * 1990-01-22 1992-07-14 Sequa Corporation Off-line web finishing system
US5517914A (en) * 1994-09-30 1996-05-21 Tilton, Sr.; Danny E. Web tension regulator for printing machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1761432B1 (de) * 1968-05-18 1971-07-29 Roland Offsetmaschf Vorrichtung zum konstanthalten der spannung einer durch eine druckmaschine laufenden werkstoffbahn
US3556510A (en) * 1968-08-21 1971-01-19 Harris Intertype Corp Automatic web tension and register control
EP0223405A1 (fr) * 1985-10-24 1987-05-27 Harland Crosfield Limited Appareil de mise en registre
DE3906043A1 (de) * 1988-03-21 1989-10-05 Polygraph Leipzig Verfahren und anordnung zum aufbauen der bahnspannung vor dem anfahren
WO1990015715A1 (fr) * 1989-06-14 1990-12-27 Quad/Tech, Inc. Systeme et methode de controle de la position angulaire d'une tige et systeme de controle de la tension et du tirage pour une presse d'imprimerie
US4945293A (en) * 1989-09-18 1990-07-31 Integrated Design Corp. Web tension control system
DE4029927A1 (de) * 1989-10-17 1991-05-02 Zirkon Druckmaschinen Gmbh Einrichtung zum regeln der bahnspannung in einer rollenrotationsdruckmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201429A2 (fr) * 2000-10-24 2002-05-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé et dispositif refroidisseur pour une bande de matériau
EP1201429A3 (fr) * 2000-10-24 2007-10-03 Goss Contiweb B.V. Procédé et dispositif refroidisseur pour une bande de matériau

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EP0893252A3 (fr) 1999-10-13
US5927196A (en) 1999-07-27
EP0893252B1 (fr) 2002-12-11
DE59806595D1 (de) 2003-01-23

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