Classifications

• • 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
  • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
  • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
• • 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
  • B65H23/32—Arrangements for turning or reversing webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
  • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
  • B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
• • 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
  • B65H2301/33—Modifying, selecting, changing orientation
  • B65H2301/332—Turning, overturning
  • B65H2301/3321—Turning, overturning kinetic therefor
  • B65H2301/33212—Turning, overturning kinetic therefor about an axis parallel to the direction of displacement of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/14—Roller pairs
  • B65H2404/142—Roller pairs arranged on movable frame
  • B65H2404/1421—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
  • B65H2404/14212—Roller pairs arranged on movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis rotating, pivoting or oscillating around an axis perpendicular to the roller axis
• • 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
  • B65H2511/50—Occurence
  • B65H2511/52—Defective operating conditions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2553/00—Sensing or detecting means
  • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
  • B65H2553/42—Cameras
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2555/00—Actuating means
  • B65H2555/20—Actuating means angular
  • B65H2555/24—Servomotors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/11—Dimensional aspect of article or web
  • B65H2701/112—Section geometry
  • B65H2701/1123—Folded article or web
  • B65H2701/11231—Fan-folded material or zig-zag or leporello
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/37—Tapes

Definitions

• the present invention relates to a device and a method for correcting a flexible web of material fed to the processing machine, the underside of the web of material incorrectly pointing upwards as a result of oppositely connected ends of the web of material or twisting, and at least one rotation of the web of material about its longitudinal axis being carried out in such a way that by the rotation the underside of the material web correctly faces downwards again and the correct material web top reaches the processing machine.
• the material webs have a width of approx. 25 mm to 200 mm.
• the material webs generally consist of nonwoven, foil, paper, airlaids or of combination composites of the aforementioned materials. These material webs have a considerable thickness of approx. 0.5 mm to 5 mm and can therefore only be wound on rolls to a limited extent.
• a packing form has developed in which the material web is either deposited in layers, zigzag on a pallet or in a cardboard box, or a pre-cut material web consisting of parallel individual webs is stacked to form a rectangular stack. In technical terminology, this depositing technique is called "festooning".
• twists in technical terms are referred to as "twist", in particular due to high feed or removal speeds of approximately 300 m / min. can be referred to
• Another problem arises when the ends of the material web have not been correctly connected to one another and the top of the material web, which is to be impregnated in the processing machine, for example, points downward.
• the twists or twists and the incorrectly connected material web ends ultimately lead to a non-functional end product due to the reversed material web top and bottom. Twists can also lead to demolition, which in turn leads to the processing machine coming to a standstill and costly waste of a semi-finished material that is already high-quality and cost-intensive.
• the invention has for its object to provide a device and a method of the type in question, which enables a correction of a flexible web of material led to the processing machine, the underside of the web of which incorrectly points upwards, and the generation of waste Reduce semi-finished material and downtimes of the processing machine changed.
• downtimes of the processing machine are to be avoided entirely and automation of the feeding process in connection with the correction of the defective material web is to be achieved.
• a device of the type in question is equipped with a rotatable pair of rollers, which causes a corrective rotation of the material web about its longitudinal axis in such a way that the underside of the material web again points correctly downward.
• connection of a rotatable pair of rollers in front of the processing machine already has an advantageous effect in that the material web is reliably guided between the rollers and - in contrast to manual correction - the twist in the section between the rotatable pair of rollers and the processing machine can no longer continue.
• the rotatable pair of rollers could be arranged on a preferably motor-driven rotating device which is mounted in a frame.
• the frame could in turn be arranged on a frame which ensures a distance from the removal point of the material web of at least approx. 1000 mm. This distance is necessary in order to give space in front of the rotatable pair of rollers or in front of the entire device, and above all to promote smooth running and to reduce the oscillation due to the relative speed between the material web and the material pack.
• a fixed pair of rollers could be arranged upstream and downstream of the pair of rotatable rollers. This measure creates additional security that twists or incorrect material web connections are effectively displaced in front of the device according to the invention after various method steps. In addition, it can be better excluded that the processing machine is ever supplied with a faulty material web, so that downtimes of the processing machine are avoided. In this context, it is particularly advantageous if the rotary direction along with the rotatable roller pair along a frame, between the two fixed roller pairs' is movable. The two fixed pairs of rollers could each be arranged in the region of the end faces of the frame.
• the distance between the pairs of rollers depends on how wide the material web is, the ratio being at least 1: 8 and usually 1:10 and significantly above. With a material web width of 100 mm there would be a minimum distance of 800 mm between the pairs of rollers. These dimensions are related to the elimination of unwanted or deliberate twists from the frame area and their expansion within defined dimensions, which depend on the properties of the material web.
• the rollers of the first and / or second fixed pair of rollers and the rotatable pair of rollers can be moved into an open and a closed position.
• the rollers of the rotatable pair of rollers are in the closed position and the rotatable pair of rollers is arranged approximately in the middle between the two fixed pairs of rollers, which is relevant with regard to the error detection of incorrectly connected material web ends is.
• the rollers of the two fixed pairs of rollers are in the closed position during normal operation and could be designed as rollers with a clamping point, pressing against one another in such a way that the continuous transport of the material web is ensured.
• the rollers of the two fixed pairs of rollers could also be designed as S-rollers, with a certain clamping effect being achieved via friction.
• the device according to the invention can work automatically - without the presence of personnel - at least one detection device for fault detection could be arranged upstream of the rotatable pair of rollers.
• An optimization of the error detection could be achieved if a first detection device is arranged upstream of the first fixed roller pair and a second detection device is arranged between the first fixed roller pair and the rotatable roller pair.
• the detection device could cause the rotatable pair of rollers to rotate through the required angle and thereby to correct the defect.
• the signaling from the detection device to the rotating device is expediently carried out without contact.
• the signaling to an external control device essentially comprises two signals, which relate on the one hand to the material web surface and on the other hand to the direction of rotation.
• the rollers of the rotatable pair of rollers could open after the recognition by the recognition device and the corresponding signaling, and rotatable pair of rollers could run over the twist of the material web from its normal position in the direction of the first fixed pair of rollers.
• the rollers of the rotatable roller pair could be brought into the closed position at a short distance from the first fixed roller pair, so that the twist or twist is located between the rotatable roller pair and the second fixed roller pair.
• the distance between the first fixed and rotatable pair of rollers should not be less than 100 mm. It should be ensured that the rotatable pair of rollers is positioned on an untwisted section of the material web in order to avoid damage, kinks, and breaks in the material web.
• the small distance between the first fixed pair of rollers and the rotatable pair of rollers is advantageous, since the new twist is under tension and can be easily ejected towards the removal point. After the new twist has jumped over the first fixed pair of rollers, its rollers immediately return to the closed position, so that within the device according to the invention a faultless course of the material web between all pairs of rollers is achieved and the rotatable pair of rollers can be moved back to its normal position.
• the device according to the invention has two further components, namely a cutting and connecting device and a material web storage, which are arranged downstream of the rotatable pair of rollers.
• Another mode of operation of the device according to the invention is activated by an external control device which processes the signals of the detection device.
• the faulty connection of the material web ends could have resulted in the material web underside connecting to the material web top. If the material web itself is so faulty that the underside of the material web connects to the top of the material web, but the feed takes place without twisting, the detection device signals that the material web is stopped for about 1 to 3 seconds.
• the material web is cut, the rotatable pair of rollers is rotated by 180 ° with the faulty material web, so that the correct material web top is facing upwards and the material web ends are connected to one another in the cutting and connecting device.
• the processing machine is supplied from the material web storage.
• a twist is created between the first fixed pair of rollers and the rotatable pair of rollers. This twist is removed in that the rollers of the first fixed pair of rollers move into the open position and the twist there or the twist there jumps over them in the direction of the removal point.
• the elimination of the twist or twist between the first fixed pair of rollers and the rotatable pair of rollers can also be carried out as already explained above, namely in that the rotatable pair of rollers opens the rollers and moves to the first fixed pair of rollers so that the Desired twist is run over and is located between the rotatable and second fixed pair of rollers, that the rotatable pair of rollers then closes and rotates the rollers, and then the resulting undesirable twist between the first fixed pair of rollers and the rotatable pair of rollers also the open rollers of the skips the first pair of rollers, then close them firmly and the rotating pair of rollers moves back to its normal position.
• the material web runs through the device according to the invention with the correct material web top, in order then to correctly enter the processing machine.
• a CCD camera and / or laser technology and / or capacitive measuring devices and / or inductive measuring devices could be used as the detection device.
• the rotatable pair of rollers or the rotating device could be part of a slide which is moved on the frame.
• Servomotors in particular AC AC servomotors, could be provided to drive the rotating device, the carriage and the rollers of the roller pairs that can be moved in the open and closed positions.
• the detection device could transmit signals and commands for controlling the movement sequences to the servomotors via PLC or PC.
• a rotation by means of a pair of rollers can largely rule out that a defective material web or an incorrectly fed material web reaches the processing machine. It is particularly advantageous if the rotation by means of a rotatable pair of rollers is preceded by a method step of error detection by means of a detection device which acts on the rotatable pair of rollers or further pairs of rollers.
• the method according to the invention could proceed as follows in the event of an undesired twist or an undesired twist, with the underside of the material web incorrectly pointing upwards:
• the method steps are not limited to the two exemplary embodiments described above. For example. error overlaps could occur, namely incorrect connection of the material web ends simultaneously with the occurrence of a twist or twist. Then the device according to the invention is to be controlled differently. Custom software programs can be created for different applications. In particular, depending on the fault pattern, several rotations through different angles may be required. In addition, the device according to the invention can be used as a pure material web deflection device for deflecting the material web at any angle.
• FIG. 2 in a schematic representation, a perspective view of the object of Fig. 1 and
• Fig. 1 in a schematic representation, a side view of a second embodiment of the device according to the invention with additional components, namely cutting and connecting device and web storage.
• FIG. 1 to 3 show two preferred exemplary embodiments of a device according to the invention for correcting a flexible material web 1 guided to the processing machine V, the underside of the material web pointing incorrectly upwards.
• the device comprises a rotatable pair of rollers 2, which brings about a corrective rotation of the material web 1 about its longitudinal axis in such a way that the underside of the material web again points downwards correctly.
• the rotatable pair of rollers 2 is fastened to a rotating device 3 which is arranged on a frame 4.
• the frame 4 is fixed on a frame 5, which ensures a distance of the frame 4 from the removal point 6 of the material web 1 of at least approximately 1000 mm.
• a fixed pair of rollers 7, 8 is arranged upstream and downstream of the rotatable pair of rollers 2, which are each arranged in the region of the end faces of the frame 4. through a carriage 9, the rotatable pair of rollers 2 can be moved along the frame 4.
• the distance between the first fixed pair of rollers 7 and the rotatable pair of rollers 2 is approximately 2900 mm due to structural requirements.
• the rollers of the first and second stationary roller pair 7, 8 and the rotatable roller pair 2 can be moved into an open and a closed position, which is also necessary for the operation of the embodiment of the device according to the invention described here.
• the rollers of all roller pairs 2, 7, 8 are in the closed position.
• Independently controllable drive elements 10 in the form of servomotors are provided for opening and closing the roller pairs 2, 7, 8.
• the drive element 10 provided for the rotatable pair of rollers 2 serves to move the carriage 9 and drive the rollers in order to move the material web 1.
• the two drive elements 10 provided for the fixed roller pairs 7, 8 drive the rollers in order to move the material web 1.
• the opening and closing of the roller pairs 2, 7, possibly 8 takes place pneumatically.
• the present exemplary embodiment of the device according to the invention provides that in order to detect a defective material web 1 and / or a defective feed, a first detection device 11 is arranged upstream of the first fixed pair of rolls 7 and a second detection device 12 is arranged upstream of the rotatable pair of rolls 2.
• the essential element of the invention is the rotation of the rotatable pair of rollers 2.
• the detection device 11, 12 gives after the detection of an error on the material web
• the material web 1 contains a twist or twist, the underside of the material web incorrectly pointing upwards.
• the twist is detected in section V2 between the first fixed pair of rollers 7 and the rotatable pair of rollers 2.
• the rollers of the pair of rotatable rollers 2 open and the pair of rotatable rollers 2 runs over the twist of the material web 1 in the direction of the first pair of fixed rollers 7.
• the rotatable pair of rollers 2 comes to a standstill approx. 100 mm in front of the first fixed pair of rollers 7 and closes the rollers.
• the twist is now located between the rotatable pair of rollers 2 and the second fixed pair of rollers 8.
• the rollers of the first fixed pair of rollers 7 reach the open position and the rotating pair of rollers 2 takes place.
• the twist of the material web 1 between the rotatable pair of rollers 2 and the second fixed pair of rollers 8 is corrected or de-twisted or twisted in section N2. While the twist of the material web 1 takes place in section N2, a new twist occurs in section V2. This twist arises within the approx.
• the material web 1 contains two incorrectly connected material web ends, the material web underside incorrectly connecting to the material web top.
• the device according to the invention according to the second exemplary embodiment shown in FIG. 3 is equipped with a cutting and connecting device 16 and a material web storage 17, which are arranged downstream of the rotatable pair of rollers 2.
• the cutting and Connecting device 16 is arranged between the second fixed pair of rollers 8 and the rotatable pair of rollers 2.
• the material web store 17 is arranged between the second fixed pair of rollers 8 and the processing machine V and comprises three fixed upper rollers, not shown, and two loosely hanging lower rollers, also not specified, so that the material web 1 forms loops.
• the material web ends are held on the one hand in the rotatable pair of rollers 2 and on the other hand in the cutting and connecting device 16.
• the rotatable pair of rollers 2 now rotates through 180 °, the material web 1 in section N2 now having the correct material web top and a twist being created in section V2 between the first stationary pair of rollers 7 and the rotatable pair of rollers 2.
• the material web ends are connected in the cutting and connecting device 16 and the material web 1 is transported to the processing machine V or to the material web storage 17.
• the twist located between the first fixed pair of rollers 7 and the rotatable pair of rollers 2, in section V2 is removed in that the rollers of the first fixed pair of rollers 7 come into the open position and are skipped by the twist there.
• the twist removal takes place as in case A, in that the rollers of the rotatable pair of rollers 2 open and the rotatable pair of rollers 2 passes over the twist of the material web 1 in section V2 in the direction of the first fixed pair of rollers 7. After driving over, the rotatable pair of rollers 2 comes to a standstill approx.
• the detection devices 11 and 12 are present in the present exemplary embodiment as CCD cameras.
• AC servomotors 10 are provided for driving the rotating device 3, the slide 9 and the rollers of the roller pairs 2, 7, 8 which can be moved in the open and closed positions.
• the detection devices 11, 12 transmit signals and commands for controlling the movement sequences via PLC to the servo motors 10.
• the removal point 6 contains a material pack 13, from where the material web 1 reaches the device according to the invention via a deflection roller 14.

Landscapes

• Replacement Of Web Rolls (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Machines For Laying And Maintaining Railways (AREA)
• Straightening Metal Sheet-Like Bodies (AREA)
• Making Paper Articles (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=28685026

Family Applications (1)

Country Status (8)

Families Citing this family (3)

Family Cites Families (15)

• 2002
  • 2002-04-12 DE DE10216419A patent/DE10216419B4/de not_active Expired - Fee Related
• 2003
  • 2003-04-11 WO PCT/DE2003/001217 patent/WO2003086924A1/fr active IP Right Grant
  • 2003-04-11 US US10/510,420 patent/US7328568B2/en not_active Expired - Fee Related
  • 2003-04-11 DE DE50303294T patent/DE50303294D1/de not_active Expired - Fee Related
  • 2003-04-11 CA CA002482128A patent/CA2482128C/fr not_active Expired - Fee Related
  • 2003-04-11 EP EP03746234A patent/EP1494948B1/fr not_active Expired - Lifetime
  • 2003-04-11 AT AT03746234T patent/ATE325769T1/de not_active IP Right Cessation
  • 2003-04-11 ES ES03746234T patent/ES2263010T3/es not_active Expired - Lifetime
  • 2003-04-11 DK DK03746234T patent/DK1494948T3/da active

Non-Patent Citations (1)

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