EP1683752A1 - Dispositif et méthode pour couper transversalement une bande en articles séparées - Google Patents

Dispositif et méthode pour couper transversalement une bande en articles séparées Download PDF

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Publication number
EP1683752A1
EP1683752A1 EP06100355A EP06100355A EP1683752A1 EP 1683752 A1 EP1683752 A1 EP 1683752A1 EP 06100355 A EP06100355 A EP 06100355A EP 06100355 A EP06100355 A EP 06100355A EP 1683752 A1 EP1683752 A1 EP 1683752A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
gripper
cutting
pressing means
endless element
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.)
Withdrawn
Application number
EP06100355A
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German (de)
English (en)
Inventor
Sebastian Prüm
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP1683752A1 publication Critical patent/EP1683752A1/fr
Withdrawn legal-status Critical Current

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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/28—Folding in combination with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/443—Moving, forwarding, guiding material by acting on surface of handled material
    • B65H2301/4431—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material
    • B65H2301/44314—Moving, forwarding, guiding material by acting on surface of handled material by means with operating surfaces contacting opposite faces of material between belts and cylinder

Definitions

  • the invention relates to a device for transverse shearing of a material web into individual material sections according to the preamble of claim 1.
  • Such a device is preferably arranged in a folding apparatus of a printing press.
  • the material web is pressed by the endless element which wraps around the cylinder against the lateral surface of the cylinder and thereby guided.
  • the cylinder is a rotatable counter-cylinder employed, so that the interface is formed as a limited by the cylinder and the counter-cylinder gap, which passes through the material web.
  • the cutting blade is arranged on the counter-cylinder. Each time the cutting blade passes through the gap in the course of one revolution of the countercylinder, a portion of material is cut off the web.
  • the guide must end by the endless element at least immediately before the gap, so that the endless element is not a hindrance to the cutting blade, or so that the endless element is not cut by the cutting blade.
  • a further endless element for guiding the leading end portion of the material web prior to successes of the cut, or the material portion after cut can be provided.
  • the guides in front of and beyond the interface can not be anywhere near the interface. Thus, always remains in front of the interface and beyond the interface always a section in which the material web or the material sections are unguided.
  • the cylinder holding means such as grippers or puncture needles for holding the material web and the material sections are known. These keep the web or the material sections but only at the leading end portions. For example, even in the case of a cylinder with grippers, the leading end section of the material web immediately after the cut is initially without a guide. Only through the nachschiebende material web, the end portion is pushed to the grippers and can be taken by them. Here, too, the problem arises that the gripper often can not properly grasp the end section because of its lack of guidance. In addition, a distance must be provided between the rear end of the last cut material portion and the leading end portion of the web, so that the grippers can pass for gripping the leading end portion between the two. The necessary facilities complicate the device in addition.
  • the holding means are puncturing needles
  • the material web is often pulled off the puncturing needles due to the centrifugal forces that occur, so that in turn damaged products and tampers are the result.
  • the material web or the material sections tear at the locations where they are punctured by the puncturing needles.
  • WO 2005/032989 A1 describes a cylinder of a folding apparatus with a cylinder body and at least one gripper.
  • US 3 337 211 A discloses a folding blade cylinder cooperating with a cutting cylinder.
  • the folding blade cylinder is looped around at its edge region by two chains, which carry a gripping element for holding the new beginning after the cut.
  • DE 726 292 C shows a device for guiding a paper web between two transverse cutting cylinders, wherein the paper web is clamped between two clamping elements carried by chains.
  • the invention has for its object to provide a device for cross-cutting of a web into individual material sections.
  • the advantages which can be achieved with the invention are, in particular, that along the entire looping of the cylinder through the endless element, the material web is pressed by the pressing means against the cylinder. Because the looping extends beyond the interface beyond the interface, the material web is also securely guided at the interface and shortly thereafter.
  • the pressing means are arranged on the endless element such that the cutting blade can easily act on the material web between two adjacent pressing means. On minimum distance between two adjacent pressing means, which allows the cutting blade an unhindered passage between these two pressing means, but is only necessary between such pressing means which pass the interface just at the time of a cut, while the distance between all other pressing means may be arbitrary, as long as the Cutting knife does not act between two adjacent pressing means.
  • the device With the device, an effective guidance of the material web is achieved both before and at and beyond the interface. At any time shortly before, during and shortly after cutting the web and the material sections are securely held on the cylinder and can not be solved by this. As a result, damage to the material web or material sections and stoppers are avoided. At the same time a uniform tension of the material web is maintained, without causing voltage fluctuations. Overall, the device operates uniformly and reliably compared to known devices.
  • an endless element is, for example, a band, a chain, a belt, a toothed belt or other endless traction elements.
  • At least one circumferential recess may be provided on the cylinder, into which the endless element engages.
  • the pressing means expediently remain outside the recess.
  • This recess may be, for example, a circumferential groove in the edge region of the lateral surface of the cylinder.
  • the recess may also be directly adjacent to an end face of the cylinder, so that the cylinder is tapered stepwise in the vicinity of this end face.
  • the endless element can be rail-guided. These rail-guided portions of the endless element can be both the cylinder wrapping around and the cylinder non-looping sections. If that Endloselement is received by a recess of the cylinder, the rail guide can also extend within this recess. With the rail guide the endless element is given a well-defined path, from which it can not deviate even in case of external disturbing influences. This makes the operation of the device more reliable and increases the safety of the operating personnel of the device.
  • each edge region of the cylinder is looped around by one of the endless elements, so that the material web sections or material web is pressed against the cylinder by the pressing means at least at its two longitudinal edges.
  • the safety of the guide is thereby increased for the material web sections or material web.
  • the pressing means of the two endless elements are connected in pairs. In such an embodiment, the material web sections or material web is pressed against the cylinder not only at its longitudinal edges, but over its entire width, whereby the tension in the material web can be maintained more easily.
  • the pressing means are advantageously at least partially made of polyurethane.
  • the pressing means may comprise one or more pressing elements made of polyurethane, which is in direct contact with the material web sections or material web. It may be foamed polyurethane, which is commercially available under the name Vulkolan. Polyurethane is particularly preferred because of its elasticity properties and its coefficient of friction with paper when the web of material is a paper web, which is the case, for example, when the device is used in a printing press.
  • the endless element itself can be supported on the cylinder, but on the other hand, it can also be supported on the cylinder only by the pressing means.
  • the pressure means can for example extend from the recess and support the endless element indirectly on the cylinder, without the endless element itself comes into contact with the cylinder.
  • the cylinder comprises a gear looped by the endless element, and the endless element is a chain or a toothed belt, wherein the teeth of the gear meshingly engage in the endless element.
  • the cutting blade is arranged on a counter-cylinder attached to the cylinder, so that it cooperates with the cylinder during each revolution of the counter-cylinder and the material section from the material web cuts .
  • This counter-cylinder forms a gap with the cylinder, which defines the interface.
  • the cutting blade can also be arranged on the cylinder itself and can be extended therefrom.
  • the cutting knife extending out of the cylinder can cooperate, for example, with the then counterbladed counter cylinder for cutting off the sections of material.
  • webs can be dispensed with the counter-cylinder even if the voltage of the endless element is large enough and the distance between the pressing means, between which the cutting blade passes through, is small enough to the web before and behind the interface and close to this against To press the cylinder and thereby prevent tearing of the web during the cut.
  • the cutting edge of the cutting blade advantageously extends slightly obliquely to its thrust direction. This avoids that the web must be cut over its entire width at the same time, if high forces would be required, which could possibly lead to slippage of the web.
  • the cutting blade can form the same angle with its lateral surface over the entire width of the cylinder and, during extension out of the cylinder, continuously cut transversely across the material web from one of the edges to the other.
  • the cutting edge of the cutting blade on a V-shaped contour and cuts the web during extension from the cylinder of the two edges at the same time starting from the center through. This design ensures a symmetrical cutting path from both sides of the web and leads to a uniformly symmetrical loading of the web during the cut.
  • the cutting edge of the cutting blade may have a tip in the center, with which the cutting blade extending out of the cylinder initially pierces the material web in the middle and then cuts through from the middle to the edges in the further course of the extension.
  • the cylinder comprises holding means, in particular grippers or puncturing needles, for holding the material sections. These are advantageous if the material sections of the endless element, for example, because they are derived from the cylinder can no longer be held.
  • holding means allow a collecting operation in which the cylinder with an already held on it Material section passes the cutting gap a second time, so that another is placed on the already held material section.
  • the holding means comprise at least one gripper which is movable between a recessed position inside the body of the cylinder, an extended position and a clamping position, wherein in the clamping position, a tip of the gripper presses a material portion from the outside against a surface portion of the cylinder body , and wherein a first axis, about which the gripper performs a pivoting movement between the retracted and the extended position, is movable in the radial direction of the cylinder body. In the retracted position, the gripper does not hinder the feeding of the material web.
  • the radial mobility of the axle makes it possible to bring the gripper quickly and yet without excessive material stress from the extended position to the clamping position.
  • a simple and robust way to drive the radial inward movement of the first axis is to mount it to a first arm which is pivotable about a second axis fixed relative to the cylinder body so that the radial movement of the first axis is pivotal about that first axis Poor corresponds.
  • This pivotal movement of the first arm can, as conventionally, the pivoting movement of the gripper itself, be driven in a simple manner by a cam which does not rotate together with the gripper cylinder and whose shape is scanned by a lever connected to the first arm.
  • the web section to be clamped by the gripper is a stack of sheets
  • the clamping is achieved only by a pivoting movement of the gripper and thus the exercise of a shearing force on a stack of sheets during clamping is unavoidable
  • a coupling rod is provided which is articulated on the one hand to the gripper and on the other hand to a second arm pivotable about a third axis. Its pivoting movement can also be driven by a cam, as indicated above.
  • the second and third axes are on opposite sides of the gripper with respect to the circumferential direction of the cylinder.
  • the first is oriented more in the circumferential direction and the second more in the radial direction of the cylinder body, in other words, the orientation of the first arm is closer to the circumferential direction than that of the second, and that of the second is closer to the radial one Direction than that of the first.
  • each gripper On the cylinder body, each gripper is associated with an abutment which, in cooperation with a knife moved together with the gripper cylinder, serves to cut the material web fed to the cylinder and to be gripped by the gripper.
  • the gripper is in front of him associated abutment, and the surface portion of the cylinder against which the gripper pushes the material web is preferably the abutment itself, the elasticity of which supports both the cutting process and the gripping.
  • the cylinder can also be designed as a folding blade cylinder. Then, a band cooperating with the cylinder is preferably arranged for guiding the web sections over the cylinder, at least in a part of the region between the knife cylinder and the jaw cylinder.
  • FIG. 01 A section through a folding apparatus on which the invention is implemented is shown in FIG.
  • transport cylinder 01 To a known cylinder 01, in particular transport cylinder 01 are on the one hand a cylinder 02, in particular a jaw cylinder 02 and on the other hand a cylinder 03, in particular a knife cylinder 03 employed.
  • the transport cylinder 01 has holding means in the form of puncturing needles or grippers, which are not shown in the figure and will be described in more detail later.
  • the transport cylinder 01 may have one or more folding blades 51 in the circumferential direction (see FIG. 13), ie be designed as a folding blade cylinder. In addition to or instead of the folding blade, the transport cylinder 01 may also be designed as a collecting cylinder.
  • To a main area 05 see FIG.
  • the main region 05 of the bale of the cylinder 01 is fixed in the axial direction by the maximum width of a paper web 04 to be processed.
  • the paper web 04 runs in a limited by the transport cylinder 01 and the knife cylinder 03 gap 06, z. B. cutting gap 06 a.
  • the transport cylinder 01 is looped around in each case by an endless element 07 in the form of a chain 07, as shown particularly in FIG. 2, which is a spatial representation of the transport cylinder 01 and the chains 07.
  • FIG. 3 is an enlarged detail view of one of the chains 07.
  • Fig. 1 is the knife cylinder 03 and the transport cylinder 01 limited gap 06 on one of the chains 07 looped peripheral portion of the transport cylinder 01.
  • the chains 07 are guided over sliding pulleys 08, with which a tension in the chains 07 can be adjusted.
  • the transport cylinder 01 has at its edge regions 10 each have a step-shaped recess 09, in which each one of the chains 07 engages (Fig. 2).
  • On the chains 07 spaced-apart pressing means 11 are arranged at a distance a11 in the longitudinal direction thereof, each projecting from the chains 07 towards the center of the transport cylinder 01.
  • Figs. 2 and 3 only two pressing means 11 are shown on each chain 07, but it should be understood that they are normally provided in greater numbers, preferably evenly spaced.
  • the chains 07 are supported on the lateral surface of the transport cylinder 01.
  • the finger-like pressing elements 11 here comprise in each case a rigid angle element 12, of which a first leg is fastened to a link of the chain 07, and a pressure block 13 fastened to a second leg of the angle element 12.
  • the pressing blocks 13 extend so far to the center of the main area 05 of the bale of the cylinder 01 out that they touch the narrowest on the folder processable paper web 04 at their longitudinal edges and press against the main region 05 of the bale of the cylinder 01.
  • the Andschreibblöcke 13 are made of a polyurethane, especially foam, which is commercially available under the name Vulkolan.
  • a paper web 04 fed to the folding apparatus of FIG. 1 initially comes into contact with the main area 05 of the latter at the level of a gap 22 between a first one of the deflection rollers 08 and the transport cylinder 01 and is pressed against the main area 05 by the pressing means 11 of the chains 07.
  • the chains 07 are driven by friction or positive engagement on the transport cylinder 01.
  • holding means in particular gripper drive between the columns 22 and 06 from the transport cylinder 01 and hold the paper web 04 fixed.
  • one of the cutting blades 14 emerges through the gap 16 between adjacent pressing means 11 and cuts through the paper web 04.
  • the tension within the paper web 04 entering the gap 22 is kept unchanged thanks to the pressing means 11 despite the cut , Since the paper web 04 is held even after the cut by the pressing means 11 on the cylinder 01, its leading edge can neither slide off the holding means by the centrifugal forces, nor can it tear at the holding means or form faults.
  • the transfer cylinder 01 forms a folding nip 52 with the jaw cylinder 02.
  • the folding blades 51 are extended out of the transport cylinder 01 to insert the sections cut from the paper web 04 along a center line into jaws (not shown) of the jaw cylinder 02.
  • the thus transversely folded portions are conveyed on the jaw cylinder 02 to a point where they are passed, for example, to a (not shown) paddle wheel for laying on a conveyor belt.
  • puncturing needles for holding the leading edge of the paper web 04 of the transport cylinder 01 may also have grippers, which are each extended after cutting from the transport cylinder 01 to the newly obtained when cutting to take leading edge and press against the outer surface of the cylinder 01. Since the pressing means 11 also prevent the leading edge immediately after the cut and before the grippers can accommodate, due to the centrifugal force of the lateral surface dissolves, the reliability of the gripper is improved by the invention.
  • FIG. 4 An alternative embodiment of the device is shown in FIG. 4.
  • Fig. 5 shows an enlarged section thereof.
  • the cranked portions of the angle elements 12 of the two chains 07 are each connected in pairs to webs 17, which extend over the entire width of the transport cylinder 01.
  • a plurality of Andrückblöcke 13 are provided which press the paper web 04 along the entire width of the transport cylinder 01 against the main region 05 of the bale of the cylinder 01.
  • the gap 16 between two adjacent pressing means 11 is selected such that the cutting blade 14 of the knife cylinder 03 can easily penetrate between the two.
  • This embodiment is also applicable to a transport cylinder 01 with puncturing needles as well as a transport cylinder 01 with grippers.
  • the grippers extending out of the transport cylinder 01 should have a comb structure with a plurality of prongs, which in each case engage in a gap 23 between adjacent pressing blocks 13 during extension.
  • Fig. 6 shows in a partial section transverse to the axis of the transport cylinder 01 a gripper 26 and its surroundings.
  • the gripper 26 comprises a support beam 27 which extends over the entire usable width of the transport cylinder 01 extends and carries on a radially outward side a double-L or Z-profile 28 of an elastic material such as spring steel, which is extendable for clamping the material sections.
  • the profile 28 may extend continuously in the axial direction of the gripper cylinder 01 or be divided into a plurality of spaced-apart in the axial direction tines, each of which is engaged by an opening in the shell of the gripper cylinder 01.
  • the support beam 27 is hinged on the one hand to a first arm 31, which is mounted with a rotatably mounted in the transport cylinder 01, d. H. cylinder stationary shaft 32 is firmly connected.
  • the first arm 31 extends approximately parallel to the lateral surface of the gripper cylinder 01.
  • the support beam 27 is further articulated via a relative to the transport cylinder 01 spatially displaceable pivot axis 33 to a coupling rod 34 which is also aligned approximately parallel to the lateral surface of the gripper cylinder 01 and in turn about a pivotable relative to the transport cylinder 01 pivot axis 36 is articulated to an approximately radially oriented second arm 37.
  • This second arm 37 is fixedly connected to a shaft 38 which is rotatably mounted in the transport cylinder 01.
  • the rotational position of the two arms 31; 37 is, as shown in FIGS. 10, 11 and 12 via two cams 39, 41 fixed, which do not rotate together with the transport cylinder 01 and which are each scanned by a roller 42, 43, each having an arm 44, 46th is connected to the shaft 32 and 38, respectively.
  • the rollers 42, 43 are preferably sprung pressed against the cams 39, 41, in particular by a torsion bar spring.
  • the cams 39; 41 are arranged offset in the axial direction.
  • a rotation of the arm 31 about the shaft 32 substantially causes a radial inward or outward movement of the gripper 26, and at most to a lesser extent a pivotal movement of the gripper 26 about the axis 47 at which the support beam 27 and the first arm 31 are hinged together.
  • the cams 39; 41 cause that the pivoting movement and the clamping movements of the gripper 26 can each be carried out substantially independently of each other.
  • the transport cylinder 01 shown in detail in FIG. 6 rotates counterclockwise. Clockwise behind the profile 28 receiving opening of the cylinder jacket in this a hard rubber strip is embedded, the surface portion 48, the z. B. serves as an axially extending abutment 48 for the knife 14 of the knife cylinder 03 when cutting the web 04.
  • the gripper 26 is arranged in the direction of movement of the cylinder 01 immediately before the abutment 48 for cutting.
  • the distance a of a tip of the gripper 26 in the retracted state and an edge of the abutment 48 is less than 30 mm, in particular less than 10 mm.
  • the gripper 26 in which the gripper 26 is sunk into the interior of the transport cylinder 01, the gripper 26 can pass the cutting gap 06, wherein the (not shown in Fig. 6) web of material 04 is severed at the level of the abutment 48 , In order to grasp the resulting leading edge of the material web 04 and to press against the abutment 48, the gripper 26 is extended from the transport cylinder 01.
  • Fig. 7 shows an intermediate position during extension.
  • the shaft 32 has rotated significantly counterclockwise, whereby the axle 47 has been displaced radially outwardly and the profile 28 of the gripper 26 has emerged from the opening of the cylinder jacket.
  • the gripper 26 is also pivoted clockwise about the axis 47, so that the tip of the free leg 29 of the profile 28 is radially above the abutment 48.
  • the gripper 26 After the passage of the gripper 26 through the folding nip 52, the gripper 26 is raised again by a rotation of the shaft 32 in the counterclockwise direction and the clamped between the free end and the abutment 26 material portion is released, as shown in Fig. 9. From this stage, the shaft 38 pivots counterclockwise to pull the free leg 29 of the gripper 26 over the abutment 48 away and over the opening of the cylinder jacket. By a subsequent rotation of the shaft 32 in a clockwise direction of the gripper 26 is again withdrawn into the interior of the gripper cylinder 01, in the position shown in Fig. 6. The gripper 26 is now ready for another pass through the cutting gap.
  • a small swing angle of the gripper 26 is sufficient to move it between the clamping position and the retracted position, and also the radial stroke is limited - depending on the thickness of the processed material web 04 - to a few millimeters. Since the gripper 26 can be simple in construction, its weight and moment of inertia are low. The short strokes between sunk position and clamping position of the gripper 26 require low accelerations and thus moderate, material-friendly driving forces.
  • Fig. 13 shows a transport cylinder 01 with three gripper systems 26, z. B. grippers 26, wherein the located in the range of the knife cylinder 03 gripper system 26 in retracted position, ie in the cutting position, located in the area between knife cylinder 03 and jaw cylinder 02 gripper system 26 in closed position, ie clamping position and arranged after the jaw cylinder 02 gripper system 26 in the open position, that is in the release position.
  • Each gripper system 26 is associated with a folding blade 51 which is extendable when passing through the folding gap 52 to pass a material section to the jaw cylinder 02.
  • a band guide 49 may additionally be arranged. These bands press the sections of the material web 04, d. H. the signatures, against the lateral surface of the transport cylinder 01. In the axial direction a plurality of bands are arranged spaced so that the spaced free legs 29 of each gripper 26 can interfere with the spaces between the bands trouble-free.
  • the band guide 49 can each be driven by the transport cylinder 01 or the jaw cylinder 02.
  • the band guide 49 can also be driven by friction or by a separate motor.
  • FIG. 14 shows a schematic plan view of a gripper system 02.
  • the grippers 26 allow in conjunction with the pressing means 11 in a simple manner a collecting operation of the folder.
  • a gripper 26 passes through the folding gap 52 without being subsequently opened and its associated folding blade 51 is extended, a portion of material held by the gripper 26 passes a second time into the cutting gap 06.
  • the cutting gap 06 it passes through the supplied web of material 04 and the pressing elements 11 kept pressed against the transport cylinder 01 and can not be detached from this, although in the meantime the gripper 26 is completely sunk in the interior of the transport cylinder 01.
  • the gripper 26 extends again after passing through the cutting gap, he clamps both sections of material firmly against the transport cylinder 01.
  • the gripper 26 can at appropriate interpretation of the cams 39,41 pass through the folding gap 51 several times in succession, without releasing the sections. Once the desired number of sections has been collected, they are transferred to the jaw cylinder 02.
  • the pressing means 11 In the collective operation of the folder presses on a first rotation of the cylinder 01, the pressing means 11 a first number of material sections to the cylinder 01 at. In a second, following the first rotation of the cylinder 01 following rotation of the cylinder 01 presses the pressing means 11 second number of material sections to the cylinder 01 at.
  • the material sections are pressed by two pressing means 11, which are offset from each other in the circumferential direction.
  • a first pressing means 11 presses a leading end of a material portion of the cylinder 01.
  • a second pressing means 11 presses a trailing end of this material portion of the cylinder 01st
  • Two pressing means 11 are adjacent to the cutting blade 14 during cutting at a distance a11 in the circumferential direction of the cylinder 01; 18; 19; 21 arranged.
  • This distance a11 is for example less than 150 mm, preferably less than 100 mm, in particular less than 50 mm.
  • the cutting blade 14; 18; 19; 21 allows unhindered passage between the two adjacent pressing means 11.
  • the cutting blades 14 are arranged extendable on the transport cylinder 01.
  • a simple counter-cylinder is provided which limits the gap 06 together with the transport cylinder 01.
  • the cutting knives move out of the transport cylinder 01 and cooperate with the counter-cylinder in the gap 06, so that a paper section is cut off from the paper web 04 (not shown).
  • the gaps 16 between successive pressing means 11 on the chains 07 can in principle be made arbitrarily narrow, as long as there is only enough space to insert a knife blade, this results in a further advantageous embodiment of the apparatus, if it cuts thin paper webs 04 or paper webs 04 should be made of an easy-to-cut paper. For then it is possible to completely dispense with a counter-cylinder and to use the pressing means, preferably those with continuous webs 17 as shown in FIG. 4 and 5, as an abutment for cutting.
  • Fig. 15 shows a transport cylinder 01 with a preferred cutting blade 18 of such an embodiment.
  • the cutting blade 18 is substantially V-shaped with a cutting edge, which forms two angles with the lateral surface of the cylinder 01.
  • the cutting blade 18 begins to cut the paper web 04 on both sides starting from its edges towards the center. This is possible because the cutting blade 18 extends between two pressing means 11 from the transport cylinder 01 and the paper web 04 is held taut by the pressing means 11 at the interface.
  • FIG. 16 shows a transporting cylinder 01 with an alternative cutting blade 19.
  • the cutting blade 19 has a cutting edge with a uniform pitch over the entire width of the main region 05 of the transporting cylinder 01.
  • the cutting edge begins to cut in Fig. 7 left edge of the paper web 04 and cuts with continuous extension of the cutting blade 19, the paper web 04 from left to right through.
  • a collecting cylinder 01 is shown with a cutting blade 21, which is particularly suitable for very thin paper webs 04.
  • a central tip of the cutting blade 21 pierces first the center of the paper web 04, and with continuous Extending the cutting blade 21, the paper web 04 is cut by the straight inclined edges of the cutting edge respectively from the center to their edges.
  • the cutting cylinder preferably carries an integer, even number of cutting blades (e.g., 2), and the transport cylinder preferably carries an integral, odd number of opposing ledges (e.g., 3, 5, or 7) for the cutting blades.
EP06100355A 2005-01-24 2006-01-16 Dispositif et méthode pour couper transversalement une bande en articles séparées Withdrawn EP1683752A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510003204 DE102005003204B3 (de) 2005-01-24 2005-01-24 Vorrichtung zum Querschneiden von einer Materialbahn in einzelne Materialabschnitte

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EP1683752A1 true EP1683752A1 (fr) 2006-07-26

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Cited By (1)

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CN108773723A (zh) * 2018-07-06 2018-11-09 佛山市均凯机械科技有限公司 一种节约资源减少出料浪费的装置

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DE102016104521A1 (de) * 2016-03-11 2017-09-14 Wagner Magnete Gmbh & Co. Kg Eisenabscheider
CN116921759A (zh) * 2022-04-12 2023-10-24 宁德时代新能源科技股份有限公司 裁切装置、裁切方法及裁切设备

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EP1136411A2 (fr) * 2000-03-23 2001-09-26 Heidelberger Druckmaschinen Aktiengesellschaft Appareil de pliage avec un cylindre de découpage et de serrage combiné
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