EP2382148B1 - Gerät zum schneiden eines fasernetzes - Google Patents

Gerät zum schneiden eines fasernetzes Download PDF

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Publication number
EP2382148B1
EP2382148B1 EP10703304.5A EP10703304A EP2382148B1 EP 2382148 B1 EP2382148 B1 EP 2382148B1 EP 10703304 A EP10703304 A EP 10703304A EP 2382148 B1 EP2382148 B1 EP 2382148B1
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EP
European Patent Office
Prior art keywords
line
carriage
nozzle
guide
pressure
Prior art date
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Application number
EP10703304.5A
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English (en)
French (fr)
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EP2382148A1 (de
Inventor
Petri Asikainen
Jari Tiitta
Teppo Kojo
Matti M. Kemppainen
Marko Tiilikainen
Risto MÄKINEN
Sami LUMIJÄRVI
Raimo Pesonen
Rami MÄKI-TULOKAS
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Valmet Technologies Oy
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Valmet Technologies Oy
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Publication of EP2382148A1 publication Critical patent/EP2382148A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound web roll
    • B65H19/265—Cutting-off the web running to the wound web roll using a cutting member moving linearly in a plane parallel to the surface of the web and along a direction crossing the web
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51534—Water jet

Definitions

  • the invention relates to a device that is used in connection with fibrous web machines; paper and cardboard machines, in particular, for cutting a fibrous web by a pressurized medium.
  • the invention relates to a device for cutting the fibrous web by a pressurized medium, the device comprising:
  • EP 1022381 Casper et Hilker represents a similar type of technology, corresponding to the patent US 6135000 and its priority application CA 2260290 , which can be considered the closest descriptions of the prior art. Accordingly, when replacing the machine roll of the reel-up of the paper machine, it is well-known to use a water jet to cut the fibrous web by a special device.
  • the device comprises at least one, preferably two carriages, which are moved on a guide bar and which comprise nozzles that move along with the carriage for shooting the water jet(s) to cut the moving fibrous web.
  • the device also comprises moving hose wheels, the purpose of which is to keep the high-pressure hoses, which lead to the nozzles, directly conveyed during the fast movement of the carriage.
  • the longitudinal feed of the hose is synchronously connected to the movement of the carriage and the feed can be controlled both during the cutting and the return movement.
  • the object of the present invention is to reduce or even eliminate the problems occurred in the prior art of the publications mentioned above.
  • the device according to the invention is characterised in further comprising a guide trough for forming the guide of the line, that the line is adapted to move in the guide trough as an essentially U-shape loop, the distance between the first end and the second end changing in accordance with the position of the carriage, and that the movement of the line is arranged to be provided by the movement of the carriage.
  • the device takes less room and can be fitted in the dry end of the machine, such as paper or board machine, which produces the fibrous web, in a more flexible and versatile manner, which is of benefit when modernising, as the existing space utilization is limited because of the web transfer, framework and any limitations dictated by the building.
  • the lighter structure can be utilized with a thinner beam structure due to smaller bends, as the masses that move in connection with the beam are lighter than in the technology known earlier. Due to the lighter masses that are moved, the movements of the carriages can be rendered quicker, the accelerations higher, and the forces and structures required by the decelerations after the quick movements can be smaller. The amount of moving mass can be reduced, as only the carriages are moved without separate actuation mechanisms for moving the hoses. In the known technology, a good control of the hoses is a requirement for the quick movement of the carriage.
  • the operation of the device can be rendered more reliable, the benefit caused by this decreasing the break time caused by the device and improving the effectiveness of the production line. Bending of the high-pressure lines is minimized in the manner presented, whereby the life of these components remains as long as possible.
  • the object of the present invention is to possibly provide a solution, by which the device can be built in a more profitable and lighter way and as many as possible components that can be standardised can be used in the assembly.
  • maintenance in the event of a possible failure is easy, e.g., by replacing the standardised components from a storage.
  • the price of a lost hour of production of the machine, such as paper machine, which produces the fibrous web can be quite considerable.
  • the invention of this application relates to a device for cutting a fibrous web by a pressurized medium, the device comprising:
  • the guide bar extends across the fibrous web, so that part of the length of the guide bar is, at both edges, partly outside the fibrous web.
  • the guide bar can be one-piece or, preferably two-piece, whereby partly overlapping guide bars are formed on the centre line of the fibrous web.
  • the guide bar or pair of guide bars is in an essentially cross direction to the moving web.
  • the cross direction refers to the cross direction with respect to the making direction of the fibrous web that travels in the fibrous web machine. Due to the overlapping guide bars, the area of the centre line comprises a small area that can be cut twice.
  • this initial position provides a wedge when the fibrous web is cut, and guiding the wedge, e.g., by blowing air, is an essential part of the replacement of the reel-up, for example.
  • the guide bar or pair of guide bars is preferably built into the elongated linear module.
  • the entire guide bar structure can be provided as one entity, so that the linear module already comprises fixing points for attaching to the framework, an inner structure for providing the longitudinal movement and a fixing point for the actuator, which can be, e.g., a servomotor.
  • a fixing point for the actuator which can be, e.g., a servomotor.
  • there are fixing points in the moving carriage that can be built directly into the linear module. Due to the fixing points, the line that conveys the pressurized medium can further be attached to the carriage.
  • the linear module comprises guide surfaces that are defined by the guide bars for the longitudinal movement, the carriage being adapted to move on the guide surfaces. The dynamic of the carriage is transmitted, e.g., through a cogged belt rotation.
  • the cogged belt rotation is driven, e.g., by the servomotor or a stepper motor.
  • the structure is rendered advantageous by the fact that, regarding the power transmission, the control and tensioning of the cogged belt are also connected to the modular structure, as well as a suitable gear transmission to provide the adequate power and velocity.
  • the bearing structure of the device across the fibrous web is preferably a beam of a sheet metal structure, whereby numerous advantages are obtained in its manufacture, transportation and installation.
  • the sheet metal structure can consist of hollow sections, in at least one of which a suitably narrow space can be reserved, in particular, which is adapted to guide the line that conveys the pressurized medium.
  • the guiding effect is of benefit during the movement of the carriage.
  • the guiding effect can be used during the cutting and the return movement of the carriage.
  • the purpose of the guiding effect is to feed the line parallel with the move-ment of the carriage in a controlled manner, without having to feed the line in its longitudinal direction in the direction of cutting, when the movement is fast.
  • the movement can be carried out slower during the return movement, whereby the line has time to settle in the narrow space in a controlled manner.
  • the line is preferably rigid enough against bending and its surface is slippery, whereby it does not have a tendency to get entangled with itself, when there is extra length available.
  • the movement of the line is supported by a supported surface below, which is preferably surface-treated with an agent that lowers the friction, e.g., plastic, Teflon or a dry slip agent, such as silicon.
  • an energy transfer chain can be used, which is adapted to control the line in the guide trough.
  • the energy transfer chain is preferably adapted to travel on its side, whereby it can be supported by means of the supported surface.
  • the assembly of the device can be implemented by an integrated booster module, which is delivered and assembled as one entity.
  • Preassembly is carried out earlier in clean premises, where the entry of refuse and impurities into the system can be prevented, as impurities tend to block up the nozzles, impairing or preventing the cutting result.
  • the preassembly can be delivered as a hermetic unit whereby, in the event of installation, it must merely be attached in place mechanically and connected electrically and pneumatically, and a delivery hose for the medium must be arranged, preferably belonging to the system of a low pressure area. After the delivery hose, preliminary filtering of the medium is arranged.
  • the line is not fed in its longitudinal direction with respect to the movement of the carriage, but the travel of the line is arranged sideways to the line.
  • the lines have flexibility in the longitudinal direction and transversally in the direction of bending.
  • the line is preferably rendered the form of a spiral and, when the carriage moves, the flexibilities mentioned above allow the carriage to move across the entire fibrous web or over a half of the width of the fibrous web at a high speed and acceleration.
  • the first end of the line is thus in a different place in the machine direction than the second end of the line, which follows the moving carriage along the guide bar.
  • the structure of the carriage is lightweight and its movement is guided by slipper pads.
  • the slipper pads between the carriage and the guide bar can be detached and, thus, easily maintained.
  • the slipper pads preferably consist of Teflon.
  • the movement of the carriage is implemented by pulling it by a clogged belt and the clogged belt is fitted between two clogged belt pulleys to be driven and controlled.
  • the longitudinal feed of the line during cutting and the reeling during the return movement are arranged in the direction of the guide bar from the reel(s).
  • a check valve and/or a high-pressure filter are integrated into the pressure section.
  • An advantage of the integration is that the mass that moves with the carriage decreases and the total mass in the beam decreases.
  • the check valve is needed to keep the pressure line pressurized, whereby the cutting can be started more easily and reliably. No air is allowed into the pressure line, the removal of which at the beginning of the cutting stage would disturb the cutting. Blowing air out as an air volume portion at the beginning of the cutting would also unnecessarily wear down the nozzle.
  • the high-pressure filter is preferably located near the end of the pressurized line, whereby a possible replacement of the high-pressure filter in the event of a blockage generally opens the entire pressure line at one blow.
  • the control of the line is possible by means of a flat belt, whereby the flat belt is used beside the line to stiffen the same and to facilitate the control.
  • the flat belt can preferably consist of spring metal.
  • the invention utilizes the differences of stiffness of the flat belt in transverse bending.
  • a typical water cutting device is implemented by the carriages that are built to move the nozzle, so that the moving mass is as small as possible.
  • the movement of the lines is provided by simply moving the carriages, and no different mechanisms are needed for the quick or slow movement of the lines to deal with the length that is fed or the length that is reeled off.
  • moving the line between the first end and the second end in a manner corresponding to the movement of the carriage can be achieved by the movement of the carriage.
  • Fig. 1 is an isometric view of the beam 10 intended for water cutting, viewed from the side of the nozzles 2, i.e., the side of the fibrous web 1.
  • the figure shows the paths of the nozzles 2, which partly overlap and are visible in openings 26.
  • the beam 10 can either be supported at its ends and/or somewhere in between; e.g., at Bessel points (the support is not shown).
  • linear modules 5 which are preferably well-equipped units that comprise a guide bar 6, a carriage 3, power transmission for moving the carriage 3 and adequate stiffness to carry itself, whereby it can be considered a so-called self-supporting make.
  • servomotors 7 are installed, for which the linear modules also comprise equipped power supply shafts.
  • the linear modules 5 can preferably be installed as such and, when needed, they are easy to replace with a corresponding spare part in connection with maintenance.
  • guide troughs 13 are built for an advantageous control of the lines 4.
  • the guide trough 13 is a space reserved for the line 4, wherein the movement of the line 4 can be guided in a controlled manner, preferably bent into a U-shape loop.
  • the guide trough 13 is a limited elongated space, which is limited by a supported surface 13A below and bearing surfaces 131, 132 on the sides.
  • Fig. 2 is an isometric view of the linear module 5, viewed from the side of the power supply shaft.
  • the linear module 5 preferably comprises a carriage 3 that is integrated into the guide bars 6.
  • Using the linear module 5 is appropriate, due to the complete standard of equipment that it provides in a compact form, comprising a power supply 51, among others. It provides the speed and acceleration needed for the cutting and the effective and safe deceleration that is needed after the cutting.
  • the linear module 5 also comprises sufficient stiffness against bending, this self-supporting quality being of advantage in the installation and transportation.
  • Fig. 2A shows the linear module 5 cut in sections.
  • an essential part consists of the guide bars 6 as a longitudinal bearing, and rolls 36 in the direction guided by them; the motion of the carriage 3 being implementable by means of the guide bars 6 and the rolls 36 in the elongated direction of the linear module 5.
  • the figure shows two rolls (one in cross section), but to stabilize the direction of motion, at least three rolls 36, installed in sequence, are needed.
  • the rolls 36 are fitted with bearings in connection with the carriage 3.
  • the contact between the rolls 36 and the guide bars 6 is based on a spherical surface, whereby the carriage 3 is able to move easily without a great friction.
  • the direction of motion of the linear guide bar 5 in the figure is the direction of the viewer's eye.
  • the linear module 5 comprises a power transmission 51 for moving the carriage 3.
  • the power transmission 51 comprises a cogged belt 14, cogged belt pulleys and a drive, such as a servomotor 7, a stepper motor or the like.
  • a portion of the cogged belt 14 is also attached in connection with the carriage 3, the belt being adapted to travel in the form of an elongated loop inside the linear guide bar 5. Suitable openings are made in the structure of the linear guide bar 5 for the travel of the cogged belt 14.
  • the other end of the cogged belt 14 comprises a fitted gearing and a cogged belt pulley 16 (not shown), by means of which the carriage 3 can be moved, e.g., by the servomotor 7.
  • the carriage 3 comprises fixing points 37 for attaching the line 4 and the pressure section 11.
  • the fixing points 37 are also provided for attaching the linear module 5.
  • the body of the linear module 5 is preferably made of an aluminium, aluminium alloy or other sheet metal, whereby industrially manufactured profiles can be used in its manufacture, e.g., by extrusion. Furthermore, empty chambers can be made in the body by ribbing, whereby the weight is reduced.
  • Fig. 3 shows the pressure section 11 in an isometric view, so that the travel of a pressure channel 35 from the inlet to the outlet is shown by a dashed line.
  • the pressure channel 35 runs through a narrow material neck MK, which in the assembly is adapted so as to run in a guide groove 17, cf. Fig. 4 .
  • the idea of the pressure channel 35 is that the pressure of the medium, e.g., water, is transferred through it from the side of the guide trough 13 into contact with the carriage 3 in the linear module 5.
  • the material neck MK is adapted to run in the guide trough 13 in the elongated guide groove 17.
  • the material neck MK is narrowed, so that the guide groove 17 does not offer the line 4 an opportunity to get into the guide groove 17 or, through that, from the guide trough 13 to the side of the linear module.
  • the guide groove 17 is preferably narrower than the diameter of the line 4 to make this even more secure.
  • the edges of the guide groove 17 are slightly rounded, bevelled or ground, so that its edges do not prematurely wear out the surface of the line 4. In this way, the second end 4B of the line 4 is conveyed to the pressure section 11 and further through the pressure channel 35 to the nozzle 2 in connection with the carriage 3.
  • the pressure section 11 is fitted into the beam 10, so that the material neck MK runs in the guide groove 17.
  • the pressurized medium is conveyed to the nozzle 2, so that the pressure section 11 comprises the narrowed material neck MK for the elongated guide groove 17 and the pressure channel 35 is conveyed along the said material neck MK for conducting the pressurized medium from the line 4 to the nozzle 2.
  • Fig. 4A shows the cross section of the beam 10 that is suited to water cutting, along the section A-A of Fig. 1 .
  • the beam 10 comprises spaces for each cutting portion over and below the same, respectively. This description concentrates on the lower half and the upper one is the same, in practice, but implemented upside down and in a different place on the beam 10 in the longitudinal direction.
  • the carriage 3 In the lower space reserved for the linear module 5, the carriage 3 is visible next to it, the pressure section 11 being installed in the carriage.
  • the pressurized medium is fed through the pressure feed 21 and through the line 4 in the guide trough 13 into the pressure section 11.
  • Pressure formation in the medium is preferably provided by a pneumatic high-pressure pump 8 (not shown), from which a feed is connected to the pressure feed 21.
  • the piping from the high-pressure pump 8 can be implemented by flexible or rigid pipework.
  • the pressure feed 21 refers to the pressure, which is formed directly by the pump or the like and which can be used immediately by the pump or conducted closer to the actuator along a transmission path through a set of channels, or connected directly to a functional device, such as the nozzle 2.
  • the line 4 is adapted to run in the guide trough 13 through a loop, which makes a turn of about 180 degrees before arriving in the inlet opening of the pressure section 11, which in the figure is on the upper edge behind the pressure section 11.
  • the line 4 thus makes a U-shape loop, which is not clearly shown in this illustration.
  • the medium is conducted to the outlet opening (downwards in the figure) and the pressure is conveyed in a lateral directon to the nozzle 2.
  • an elongated opening 26 is adapted, comprising a seal 25.
  • the nozzle 2 is adapted to move in the elongated gap of the seal 25 in the direction of the viewer's eye.
  • the seal 25 can comprise, e.g., rubber as a butt joint, the moving nozzle 2 opening it slightly, or be implemented by means of stiff bristles, which the nozzle bends outwards or sidewards.
  • the beam 10 can be divided into different spaces in various ways; Fig. 4 A shows one way.
  • the line 4 in the guide trough 13 is adapted to run through one U-shape (180 degrees) loop.
  • This loop is adapted between bearing surfaces 131, 132, so that the loop tends to press against these bearing surfaces 131, 132.
  • the control of the line 4 is based on the space of motion defined by the bearing surfaces 131, 132 in the lateral direction, inside of which space the line 4 is fitted.
  • the vertical control in the guide trough 13 is based on the fact that the elevation of the guide trough 13 is low, whereby the line 4 cannot cause entanglement.
  • the line 4 is adapted to move on a supported surface 13a, which is preferably a surface horizontal to the normal of the beam 10 in the guide trough 13.
  • the inner surfaces of the guide trough 13 are thus utilized in forming a guide for the line.
  • the guide is thus produced by the interaction of the inner surfaces and the outer surface of the line 4 and the stiffness of the line 4.
  • the height of the guide trough 13 is preferably 1.5-5 times the diameter of the line.
  • At least one of the walls that limit the guide trough so as to be low can be made of at least somewhat transparent material, whereby the behaviour of the line can be monitored visually or by means of a computer vision, for example.
  • the inner surface of the guide trough 13 or the surface of the line 4 can be treated or coated with a material, which improves the travel or movability of the line, reduces the friction or otherwise decreases the premature wearing of the line 4.
  • the line 4 makes a U-shape loop in the guide trough 13, the cross section of which is adapted to suit the bending radius of line 4 in a first direction and the diameter of line 4 in a second direction.
  • the advantageous control of the loop is based on the fixed attachment of the line 4 at its first end 4A, whereby moving the second end 4B of the line 4 inevitably results in that the U-shape loop follows this movement in a controlled manner.
  • the speed of the U loop is about half of the speed of motion of the second end 4B of the line 4.
  • the speed of motion of the line 4 can be increased to 10/sec and the motion of the line 4 in the guide trough 13 is still controlled without separate feed reels or similar means of the line 4, which would support the line 4 mechanically or in another way on the curved inside of the U loop. Consequently, the line 4 is adapted to be fed or pulled, in the U shape and supported with respect to the flexural centre KP, from outside the line 4.
  • the pressure section 11 is adapted to run in the guide groove 17, through which the pressurized medium can be conducted from the guide trough 13 on the side of the linear module 5 and into contact with the nozzle 2.
  • the guide groove 17 is depicted narrower than the line 4, whereby the line 4 cannot get stuck in the guide groove 17 that runs in parallel.
  • the guide groove 17 forms an elongated opening, which has a smaller principal dimension in the narrower direction and a larger principal dimension in the longer direction.
  • the smaller principal dimension of the opening is preferably smaller than the diameter of the line 4 or the width of the energy transfer chain 18. Consequently, the moving parts are protected against adhering to the edges of the elongated guide groove 17 in the direction of motion.
  • Fig. 4B shows the energy transfer chain 18, which is adapted to guide the line 4 in the guide trough 13.
  • the energy transfer chain 18 is preferably adapted to travel on its side, whereby it is supported by the supported surface 13A.
  • the energy transfer chain 18 can be used to easily implement the supported 180-degree turn of the line 4.
  • the line 4 is adapted to run between the first end 4A and the second end 4B, supported by the energy transfer chain 18.
  • the first end of the energy transfer chain 18 is firmly fixed to the guide trough 13 at the end of the line 4, which in this application is called the first end 4A.
  • Fig. 5 A is a top view of the travel of the line 4 in the guide trough 13, when the cutting is approaching its extreme position.
  • the direction of cutting is marked with an arrow.
  • the pressure feed 21 is at the first end 4A of the line 4, which is fixed.
  • the second end 4B of the line is in the moving carriage 3.
  • the line 4 mainly follows the movement of the nozzle 2 linearly, as the line 4 is pulled forward.
  • the line 4 moves in the space between the bearing surfaces 131, 132 and it is arranged so as to travel in a U shape between the bearing surfaces 131, 132, whereby the flexural centre KP of the curvature of the U-shape loop is in the middle of the loop.
  • the space between these also comprises a partition wall 133, which is installed in the longitudinal direction and which divides the space between the bearing surfaces 131, 132 and can limit the space of motion of the line 4.
  • the partition wall 133 can be extendable and/or movable. The movement of the line 4 is limited by the supported surface 13 A below.
  • the line 4 is supported by at least one of the following: the bearing surfaces 131, 132 or the partition wall 133.
  • Fig. 5B is a top view of the travel of the line 4 in the guide trough 13 after the cutting movement and during the return movement.
  • the nozzle 2, i.e., mainly the second end 4B of the line 4 is pushed from its extreme position back to its home position, i.e., the position before cutting.
  • the line 4 then also tends to escape sidewards at least to some extent, i.e., it is difficult to control the line 4 by pushing.
  • the partition wall 133 now limits the space on the sides sufficiently, whereby the line 4 must travel in its main direction, i.e., towards its home position.
  • the loop, which the line 4 makes, travels ahead of the nozzle 2 at a velocity of about a half of that of,the nozzle 2.
  • the line 4 is that, regarding its bending stiffness, its smallest bending radius R without a permanent deformation is slightly smaller than half of the distance of the bearing surfaces 131, 132. The line 4 thus tends to push against the bearing surfaces 131, 132. Furthermore, the flexural centre KP of the line 4 is adapted to move in the direction of motion of the carriage 3. In the guide trough 13, the line 4 is adapted to straighten in a manner similar to the progressive motion of the carriage 3. The pressure feed 21 is further arranged through a fixed point.
  • Fig. 5C is a top view of the travel of the line 4 in the guide trough 13 after the cutting movement, when the carriage 3 with its nozzle 2 has returned to the home position. Consequently, Figs. 5A , 5B and 5C show a function, wherein the motion of the line 4 is provided by the motion of the carriage 3 only. In the operation of the device, during the cutting or the return movement, the flexural centre KP of the line 4 is adapted to move in the direction of the guide bar 6.
  • the running speeds of the carriages 3 and the surface properties of the guide trough 13 in the operation of the device during cutting or the return movement it is possible to feed the line 4 in a curved form, corresponding to the movement of the carriage 3, without an inner curved support against the line 4, whereby no support or feed of the line 4 is needed and the weight of the structure can be reduced.
  • the velocity of cutting is higher than that of the return movement but, generally, the return movement does not need to be very quick, as there is usually enough time for the next cutting.
  • Fig. 6 shows a typical position of the beam 10 suitable for water cutting on the reel-up of the paper or board machine.
  • the fibrous web 1 is brought to the reel-up through rollers.
  • the beam 10 is preferably adapted to a web transfer defined by the rollers, wherein the fibrous web 1 travels on a straight plane, i.e., the distance of the beam 1 from the fibrous web 1 is as constant as possible to ensure a good cutting result; in this case, between a paper guide roller 34 and a reel-up drum 30.
  • the nozzles 2 of the beam 10 cut the necessary slits in the fibrous web 1, which slits run through the nip between the reel-up drum 30 and an empty machine roll iron 33 in the direction of a blowpipe 32, the air blast released from the blowpipe raising the fibrous web 1 onto the machine roll iron 33.
  • the machine roll 29 that is being completed can be detached from the nip contact of the reel-up drum 30 and the reeling continues onto the machine roll iron 33.
  • the blowpipe 32 can also be located in another place, depending on the way of replacing the roll (e.g., below the fibrous web 1, if the machine roll being completed is detached from the nip before the replacement and before cutting the fibrous web 1).
  • the way of replacement and its side layout shown herein is an example and not intended to limit the use of the device.
  • the device can also be used in the web feeding to raise the fibrous web onto the empty machine roll iron 33 after the fibrous web 1 on the reel-up has gained its full width.
  • the fibrous web 1 is inclined to follow onto the machine roll iron 33, as the air layer rotating around the machine roll iron 33 tends to guide the fibrous web 1 in that direction. This is particularly the case, when the nip between the machine roll iron 33 and the reel-up drum 30 is safely closed.
  • the air flow of the blowpipe 32 is also used.
  • Fig. 7A shows the nozzle 2, which can be adapted so as to move in the flexible opening 26 in the direction of the guide bar 6.
  • the cuttings consist of a paste formed by broken fibres and the medium which, when drying, may cause blockage and barriers to the movement of the nozzle 2 and the running of the medium; particularly when cutting tissue paper.
  • the flexible opening 26 can consist of, e.g., two rubber sheets, which are installed in a butt joint in parallel to the direction of the guide bar 6.
  • the nozzle 2 runs along the butt joint at a speed defined by the carriage 3.
  • the nozzle 2 When travelling, the nozzle 2 opens slightly the butt joint, so that the nozzle 2 is able to spray through the gap of the butt joint without disturbances, Fig. 7B .
  • the seals 25 may run in the direction of the guide bar 6 at the same distance and, in the non-active cutting area (e.g., in a rest position and a service position), the distance of the seal 25 from the nozzle 2 may change, so that the nozzle 2 remains covered or that the nozzle 2 is uncovered to be maintained.
  • the butt joint can comprise so much compression at the frontal faces that the seals 25 bend outwards from the plane according to the attachments.
  • the seal 25 can also be implemented by means of stiff bristles, which are attached to the edge of the seal 25 at one end thereof.
  • the bristles are arranged opposite each other and the nozzle 2 runs in the gap, which is limited by the bristles on both sides.
  • the edges of the seals 25 or the bristles can be designed or selected so that they do not decelerate the movement of the nozzle 2. Correspondingly, their resistance to motion does not essentially change with time, whereby the cutting motion and speed remain constant for a long time.
  • Fig. 8A shows the flat belt 19, which is suitable to support the line 4 and characterised in its differences in stiffnes in the lateral bending. Its lateral bending stiffness in the first direction is multiple in relation to the second direction. The second direction differs from the first lateral direction by 90 degrees.
  • the figure shows the pressure feed 21 to the first end 4A of the line and the nozzle 2 to the second end 4B, which is adapted to be movable.
  • the flat belt 19 runs next to the line 4; in this case, in the form of a curve on the side of the inner curve.
  • the cross section A-A illustrates the position in Fig. 8B .
  • the flat belt 19 can be ferromagnetic and its control, keeping in place, attachment to the rest position and release can be implemented by means of magnets 20, Fig. 9 .
  • the magnets 20 can be permanent magnets or electromagnets. By means of the successive permanent or electromagnets that are essentially installed in a queue, the release and attachment of the flat belt 19 and the line 4 can be implemented as sequential events in time, whereby the long line 4 can be controlled along its length.
  • the starting of the carriage 3 can be controlled by means of the holding power of the magnets 20.
  • the magnets 20 that resist the moving force keep the carriage 3 in the starting position, until the carriages 3 can be shooted by releasing the holding power of the magnets 20.
  • the magnets 20 are firmly attached in place, e.g., to the structure adjacent to the guide trough 13.
  • the magnets 20 are elongated magnetic tapes.
  • the flat belt 19 can also be guided so that it is forced into a form according to a preferred path of the line 4, which form the flat belt 19 tends to conform to.
  • the flat belt 19 can comprise spring metal, which is provided with a desired prestress.
  • the prestressed state can be the shape the line 4 obtains in the cutting position or cut position, corresponding to the state, or the shape the line 4 obtains in its rest position, corresponding to the state.
  • An unstressed state can also be any state that corresponds to the shape of the flat belt 19, existing during cutting. In this way, at the starting of the carriage 3, the line 4 tends to straighten in the direction of the motion of carriage 3. The motion then accelerates and it is easy to control the line 4.
  • bypassing the unstressed state and attaching the line 4 in the second direction hardly decelerates the motion, as the mass slowness of the carriages 3 at high speeds tends to maintain the motion.
  • the flat belt 19 can also be guided by means of a groove in the longitudinal direction, Fig. 10 .
  • the purpose of the groove is to prevent the combination of the line 4 and flat belt 19 from hanging or distorting.
  • the flat belt 19 is moved by pulling or pushing along the groove.
  • the length of the groove is not necessarily the entire length of travel, e.g., on the curve according to Fig. 8A .
  • Fig. 11 is a top view of an integrated booster module 9. It can comprise high-pressure filters 28, which are robust enough for any defect particles.
  • the high-pressure filter 28 may comprise, e.g., a filter based on 150 holes, which can enable as many as 149 holes that are blocked by particles, but yet allows pressure supply to the nozzles 2 through one hole.
  • the diameters of the openings of nozzles 2 are within 0.06-0.40 mm and the pressure used within 800-2000 bar.
  • the integrated booster module 9 can also be delivered as a spare part, whereby its replacement next to the exsisting one in the event of a failure enables a quick shutdown without a great loss of production.
  • a space for the integrated booster module 9 is prepared in the beam 10, in which it is easy to install.
  • the figure shows a web transfer by the reel-up, as the fibrous web 1 can be reeled up during reeling.
  • the integrated booster module 9 As the integrated booster module 9 is easy to replace, it can be replaced, e.g., during running.
  • the pressure feed 21 from the high-pressure pump 8 is detached and the integrated booster module 9 can be lowered to the floor below the fibrous web.
  • a new substitutive integrated booster module 9 can be connected in place, re-connect the pressure feed 21, and the maintenance is essentially carried out without breaking the fibrous web 1.
  • Figs. 12A and 12B show the idea of the fourth embodiment as a basic diagram.
  • Fig. 12A shows a slightly impractical method, wherein the lines 4 of a fixed measure are moved by twisting aroung the first ends 4A. It is obvious that the second ends 4B of the lines 4 yield curved cutting lines, whereby the solution is not very practical.
  • the stretching line 4 can be at the end of the nozzle 2 or the line 4 can be so long that there is no need for a line 4 made of a solid pipe.
  • Fig. 13 shows a solution according to this principle on the reel-up.
  • a housing 38 is preferably built, in which the lines 4 can move, shielded against shredded paper or the like. Part of the length of the lines 4 can also be implemented using a hard pipe in the area of the first end 4A and/or the second end 4B. It is relatively easy to replace the lines 4 in the shielded housing; when needed, by opening the housing, detaching the lines from the first end 4A and the second end 4B, and to replace them with new lines 4.
  • the location of the beam 10 neither limits nor influences the direction of cutting but the fibrous web 1 that moves both in the horizontal and vertical direction (or something between) can be cut.
  • the bottom level in the shielded housing 38 should be built so as to use, as the basis of dimensioning, the weight of a serviceman rather than simply that of the lines 4.
  • the extreme positions of the lines 4, the initial position thereof on the centre line of the fibrous web machine and, after the cutting, on the edges of the fibrous web 1 are presented.
  • Fig. 14 shows a side view of an embodiment based on a lightweight carriage 3, wherein the motion of the carriage 3 is guided by slipper pads 12.
  • the slipper pads 12 between the carriage and the guide bar 6 can be detached and, thus, easily maintained.
  • the slipper pads 12 can preferably consist of Teflon.
  • the movement of the carriage 3 is implemented by pulling by the clogged belt 14 and the clogged belt 14 is adapted to be driven and controlled between two clogged belt pulleys 16.
  • the longitudinal feed of the line 4 during cutting and the reeling during the return movement are arranged in the direction of the guide bar 6 from a separate reel 22.
  • the reel 22 is driven in synchronization with the motion of the carriage 3.
  • the line 4 in a pressurized state is on the reel 22.
  • the pressurized medium is fed into the line 4 through the rotational fitting 24 placed on the axis of the reel 22, the fitting allowing the rotation of the reel 22, when the line 4 is in the pressurized state.
  • an adjustable spring which can be the rotational spring 23R on the axis of the reel 22 or the translation spring 23T at the end of the line 4 on the side of the nozzle 2.
  • both carriages 3 can have their own reel 22 of line 4, whereby the device consists of two units.
  • This can also be implemented so that the line 4 of the second nozzle 2 does not necessarily need a reel 22 of its own, but the line 4 can be extended from the first nozzle 2 to the second nozzle 2 in a way similar to a belt or another pulling member.
  • the reel 22 is located on the other edge of the fibrous web 1 that is to be cut, the line 4 runs across the fibrous web 1 and the line 4 extends past the first nozzle 2 over the entire fibrous web 1 to the other edge of the fibrous web machine.
  • the other edge of the fibrous web machine comprises a rotating guide roller 15, through the periphery of which the line 4 is returned over the fibrous web 1 again, whereby the line 4 ends in the second nozzle 2.
  • the axis of the guide roller 15 is preferably parallel with the axis of the reel 22.
  • Fig. 15 is a top view of an embodiment based on a lightweight carriage 3, the body plate above the beam 10 being removed to expose the structure.
  • a servomotor 7 which can drive the carriage 3 to a desired position for cutting, web feeding or maintenance.
  • Fig. 16 shows a partial cross section of an embodiment based on the lightweight carriage 3, as viewed from the end.
  • the carriage 3 is supported by means of slipper pads 12 and moved by the cogged belt 14.
  • the line 4 in the vicinity of the nozzle 2 preferably consists of a rigid pipe, from which it can be connected to the flexible line 4 to carry out reeling.
  • the slipper pads 12 are preferably shaped so as to comprise different gradations, angles or flanges, which can support and control the travel and motion of the carriage 3. Correspondingly, these gradations, angles and flanges can be shaped to have corresponding surfaces on the side of the beam 10, whereby the longitudinal guide surfaces of the beam 10 can be implemented. Due to the structure, the slipper pads 12 are made so as to be easily replaced.
  • Fig. 17 is a diagrammatic top view of a simple belt-driven device.
  • the cogged belt 14 a belt or other similar pulling member is arranged between the reel 22 and the guide roller 15.
  • the cogged belt 14 is returned back across the fibrous web 1.
  • the first nozzle 2 is placed along the first crossing and the second nozzle 2 is placed along the second crossing.
  • the cutting motion is provided by moving the cogged belt 14, whereby both nozzles 2 move simultaneously.
  • the line 4 follows the cogged belt 14, moving to each nozzle 2 separately.
  • Fig. 18 shows a modification for implementing the pressure section 11.
  • a check valve 27 and a high-pressure filter 28 can also be integrated, whereby the high-pressure medium can be conveyed to the nozzle 2 thorough them.
  • the integrated solution enables the mass of the pressure section 11 and, through that, the mass in the carriage 3 to be decreased, whereby the structure of the beam 10 can be further lightened.
  • the check valve 27, which is preferably spring-loaded, provides the advantage that the medium inside the line 4 does not exit between cuts. When re-starting cutting, the pressure strokes are smaller and, correspondingly, the device does not spill the medium onto the fibrous web 1 or the floor. Cutting can be started immediately.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Vorrichtung zum Schneiden einer Faserbahn (1) mittels eines unter Druck stehenden Mediums, welche Folgendes aufweist:
    - einen Balken (10), der im Wesentlichen quer zu der Bewegungsrichtung der Faserbahn (1) angeordnet ist;
    - einen Schlitten (3), der dafür vorgesehen ist, sich zu bewegen, und an dem eine Düse (2) zum Schneiden der Faserbahn (1) angebracht ist;
    - eine Leitung (4) zum Fördern des unter Druck stehenden Mediums zu der Düse (2), wobei das erste Ende (4A) der Leitung (4) dafür vorgesehen ist, mit einer Druckzufuhr (21) verbunden zu werden, und das zweite Ende (4B) der Leitung (4) dafür vorgesehen ist, sich in Verbindung mit dem Schlitten (3) zu bewegen;
    dadurch gekennzeichnet, dass
    sie des Weiteren einen Führungstrog (13) zum Bilden der Führung der Leitung (4) aufweist, dass die Leitung (4) dafür vorgesehen ist, sich in dem Führungstrog (13) als eine im Wesentlichen U-förmige Schleife zu bewegen, wenn sich der Abstand zwischen dem ersten Ende (4A) und dem zweiten Ende (4B) gemäß der Position des Schlittens (3) ändert, und dass die Bewegung der Leitung (4) dafür vorgesehen ist, durch die Bewegung des in einem Linearmodul (5) untergebrachten Schlittens (3) erzeugt zu werden.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Vorrichtung in der Nähe eines Aufrollers (31) angeordnet ist, um einen Rollentausch des Aufrollers (31) oder die Bahnzuführung zu der Maschinenrolle (33) durchzuführen.
  3. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Leitung (4) dafür vorgesehen ist, sich horizontal zu der Normalen des Balkens (10) auf der abgestützten Fläche (13A) des Führungstrogs (13) zu bewegen.
  4. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das Linearmodul (5) eine Kraftübertragung (51) zum Bewegen des Schlittens (3) aufweist.
  5. Vorrichtung nach Anspruch 4,
    dadurch gekennzeichnet, dass
    die Kraftübertragung (51) einen Zahnriemen (14), Zahnriemenräder (16) und einen Antrieb, wie zum Beispiel einen Servomotor (7), einen Schrittmotor oder ähnliches, aufweist.
  6. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    der Führungstrog (13) dafür vorgesehen ist, den Bewegungsraum der Leitung (4) innerhalb der Lagerflächen (13A, 131, 132, 133) des Führungstrogs (13) zu begrenzen.
  7. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Leitung (4) dafür vorgesehen ist, sich in dem Führungstrog (13) auf eine der progressiven Bewegung des Schlittens (3) ähnliche Art und Weise zu richten.
  8. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Leitung (4) dafür vorgesehen ist, sich um den Biegemittelpunkt (KP) der Leitung (4) in dem durch den Führungstrog (13) festgelegten Raum zu biegen, wobei die Leitung (4) beim Biegen durch wenigstens eines der folgenden unterstützt wird: die Lagerflächen (131, 132) oder eine Trennungswand (133).
  9. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    der Biegemittelpunkt (KP) der Linie (4) dafür vorgesehen ist, sich in der Richtung der Bewegung des Schlittens (3) zu bewegen.
  10. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Leitung (4) dafür vorgesehen ist, sich auf ihrer Seite gegen eine horizontal abgestützte Fläche (13A), unterstützt durch eine sich bewegende Energieübertragungskette (18), zwischen dem ersten Ende (4A) und dem zweiten Ende (4B) zu bewegen.
  11. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Leitung (4) dafür vorgesehen ist, in einer U-Form, im Hinblick auf den Biegemittelpunkt (KP) gestützt, von außerhalb der Leitung (4) zugeführt oder gezogen zu werden.
  12. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das zweite Ende (4B) der Leitung (4) zu einem Druckbereich (11) und weiter durch einen Druckkanal (35) zu der in Verbindung mit dem Schlitten (3) stehenden Düse (2) geführt wird.
  13. Vorrichtung nach Anspruch 12,
    dadurch gekennzeichnet, dass
    der Druckbereich (11) einen verengten Materialhals (MK) für eine längliche Führungsnut (17) aufweist und der Druckkanal (35) entlang des Materialhalses (MK) geführt wird, um das unter Druck stehende Medium von der Leitung (4) zu der Düse (2) zu leiten.
  14. Vorrichtung nach Anspruch 12,
    dadurch gekennzeichnet, dass
    der Druckkanal (35) in die Förderung des Hochdruckmediums durch ein Rückschlagventil (27) und/oder einen Hochdruckfilter (28) zu der Düse (2) integriert ist.
  15. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Vorrichtung von einem aus einem Metallblech hergestellten Balken (10) getragen ist.
EP10703304.5A 2009-01-28 2010-01-25 Gerät zum schneiden eines fasernetzes Active EP2382148B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095073A FI20095073A (fi) 2009-01-28 2009-01-28 Laite kuiturainen leikkaamiseksi
PCT/FI2010/050037 WO2010086499A1 (en) 2009-01-28 2010-01-25 Device for cutting a fibrous web

Publications (2)

Publication Number Publication Date
EP2382148A1 EP2382148A1 (de) 2011-11-02
EP2382148B1 true EP2382148B1 (de) 2015-10-07

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Application Number Title Priority Date Filing Date
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Country Status (5)

Country Link
EP (1) EP2382148B1 (de)
CN (1) CN102300795B (de)
CA (1) CA2748310C (de)
FI (1) FI20095073A (de)
WO (1) WO2010086499A1 (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO144622C (no) * 1979-12-13 1981-10-07 Thune Eureka As Fremfoeringssprits.
DE3515519A1 (de) * 1985-04-30 1986-10-30 J.M. Voith Gmbh, 7920 Heidenheim Verfahren zum ueberfuehren einer bahn von einem fertigen wickel auf einen neuen wickelkern sowie tragtrommel-rollapparat zur durchfuehrung des verfahrens
EP0490906B1 (de) * 1989-09-08 1994-01-05 Fibron Machine Corporation Wasserstrahl-schneideinrichtung für einen sich bewegenden papierbogen
FI102826B (fi) * 1995-09-29 1999-02-26 Valmet Corp Menetelmä ja laite kiinnirullauksessa
CA2258533C (en) * 1996-06-17 2005-04-12 Beloit Technologies, Inc. Reel web turn-up device
CA2260290C (en) * 1999-01-25 2007-10-09 Dieter H. Hilker A web cutting apparatus for use in a papermaking machine
DE19910581A1 (de) * 1999-03-10 2000-09-14 Voith Sulzer Papiertech Patent Linear-Antriebs-Aggregat
FI117015B (fi) * 2001-06-05 2006-05-15 Metso Paper Inc Laitteisto ja menetelmä terän vaihtamiseksi
ITFI20030064A1 (it) * 2003-03-13 2004-09-14 Perini Fabio Spa Dispositivo svolgitore automatico e continuo per erogare

Also Published As

Publication number Publication date
CN102300795B (zh) 2014-03-12
WO2010086499A1 (en) 2010-08-05
FI20095073A0 (fi) 2009-01-28
CN102300795A (zh) 2011-12-28
CA2748310A1 (en) 2010-08-05
EP2382148A1 (de) 2011-11-02
CA2748310C (en) 2017-03-21
FI20095073A (fi) 2010-07-29

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