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WO2023030749A1 - Arbre porte-lame - Google Patents

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Publication number
WO2023030749A1
WO2023030749A1 PCT/EP2022/070375 EP2022070375W WO2023030749A1 WO 2023030749 A1 WO2023030749 A1 WO 2023030749A1 EP 2022070375 W EP2022070375 W EP 2022070375W WO 2023030749 A1 WO2023030749 A1 WO 2023030749A1
Authority
WO
WIPO (PCT)
Prior art keywords
knife
shaft
carrier
blade
cutting
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.)
Ceased
Application number
PCT/EP2022/070375
Other languages
German (de)
English (en)
Inventor
Thorsten Gädtke
Mathias Borg
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.)
BW Papersystems Hamburg GmbH
Original Assignee
BW Papersystems Hamburg GmbH
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
Priority claimed from DE102021131925.0A external-priority patent/DE102021131925A1/de
Application filed by BW Papersystems Hamburg GmbH filed Critical BW Papersystems Hamburg GmbH
Publication of WO2023030749A1 publication Critical patent/WO2023030749A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B26D1/405—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/36—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder
    • B26D1/365—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and rotating continuously in one direction during cutting, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member

Definitions

  • the invention relates to a knife shaft for cutting, in particular transverse cutting, of material webs, in particular material webs made of paper, cardboard and/or plastic.
  • the present invention relates to a cross cutter for cutting, in particular cross-cutting, material webs of any type, in particular material webs made of paper, cardboard and/or plastic, with a knife shaft and with a further knife shaft or with an anvil or with an anvil shaft.
  • the present invention also relates to a method for feeding a knife, for example on a knife shaft.
  • Knife shafts of the type in question are used, for example, in cross cutters.
  • Cross cutters of this type are used to make incisions and/or perforations in transported, running webs of material transversely to their conveying or transporting direction.
  • the web of material can be cut once or several times, with sheets of the same length and/or of different lengths being able to be produced from the web of material.
  • the running web of material can be provided with one or more transverse perforations.
  • the web of material can be webs of paper, cardboard, plastic or metal foil, fabric or other materials.
  • Cross cutters exist in different constellations.
  • “synchro-cross cutters” there are two cutter shafts arranged one above the other in a machine frame so as to be rotatable.
  • “crush cut” only one knife drum is also provided, the knife of which comes into contact with an anvil of an anvil shaft in the cutting engagement.
  • the cutting position of the blade of the blade shaft in relation to the blade of another blade shaft or to an anvil or an anvil shaft i.e. the vertical and/or horizontal distance to one another and/or the angle of two blade edges to one another during the cutting process and/or the immersion depth during the cutting process, has an effect has a decisive effect on the cutting quality and the throughput of the material web during the cutting process. Accordingly, a precise relevant setting of the cutting position, which is also referred to as infeed, is of great importance before starting up the cross cutter.
  • the aim is to achieve as precise an infeed as possible, in which the knife is precisely aligned relative to the other knife or to the anvil or to the anvil shaft and is therefore “in the cut”, ie in the correct alignment.
  • the knife is mostly held or clamped in a clamping manner on the knife shaft.
  • a knife on the knife shaft relative to a counter-knife or an anvil or an anvil shaft
  • the knife is initially offset at a lateral distance from the counter knife or anvil or from the anvil shaft.
  • a force is then exerted laterally on the knife by means of adjusting screws spaced apart from one another in the longitudinal direction of the knife, and the knife is thereby bent and/or tilted in order to reduce the initial distance of the knife from the counter knife or anvil.
  • This infeed of the knife takes place along the length of the knife via the adjusting screws acting on the side of the knife.
  • the knife is deformed slightly in a wavy shape in the longitudinal direction due to the adjusting screws being spaced apart from one another.
  • the cutting edge of the knife no longer runs in alignment or along a straight line, but slightly wavy, which can have a negative impact on the cutting pattern.
  • the knife is mechanically stressed by the transverse forces transmitted during infeed, which can lead to undesired material fatigue.
  • the delivery of the knife via adjusting screws is complex and time-consuming, with repeated readjustment often being necessary.
  • the object of the present invention is to provide a knife shaft, a cross cutter and a method for feeding a knife on a knife shaft, each of the type mentioned at the outset, which enable the knife to be fed precisely, easily and gently, in particular without deformation.
  • the knife shaft has at least one knife carrier, held adjustably on the knife shaft, for at least one knife, the knife being adjustable via a parallel adjustment or a parallel offset of the knife carrier.
  • the knife shaft according to the invention enables the knife to be fed in gently and precisely, with the knife being held firmly or immovably, preferably in a clamped manner, on the knife carrier. In this respect, the knife is adjusted in parallel with the knife carrier as a unit or package as part of the delivery.
  • the delivery of the knife is preferably carried out starting from a pre-cut position of the knife, in particular starting from a collision position.
  • the knife edge of the knife shaft has a specific distance from the knife edge of a counter knife or from an anvil or an anvil shaft.
  • the knife is preferably in a collision position in which, when the knife shaft rotates, the knife flank collides with the knife flank of a counter knife or with an anvil or with an anvil shaft.
  • the pre-cut position is then characterized in that the cutting edge of the knife is offset laterally and/or tangentially to a cutting position of the knife in which the cut is carried out correctly.
  • the lateral offset in the pre-cutting position ensures that when the cutter shaft rotates, one flank of the knife strikes a flank of a counter-knife or an anvil or an anvil shaft.
  • the knife is shifted or laterally fed during further rotation of the knife shaft via the parallel adjustment of the knife carrier from the pre-cut position into a cutting position relative to the cutting edge of the counter-knife, to the anvil or to the anvil shaft. In this cutting position, the cutting edge of the knife is therefore in the correct alignment or "in the cut".
  • the knife In this cutting position, the knife then lies on a target flight circle, in which the cutting edge of the knife slides past the shearbar or the anvil or the anvil shaft, preferably essentially without play, when the knife shaft rotates.
  • the knife is in a cutting position in which the knife is in a different position than the pre-cut position, in particular on the knife edge if it is at an increased distance from a counter knife or an anvil or an anvil shaft.
  • the knife edge touches the knife edge of a counter knife or an anvil or an anvil shaft when the knife shaft rotates.
  • the parallel offset of the knife carrier takes place automatically due to a force transmission when the knife, which is in a pre-cutting position, collides with a counter-knife or an anvil or an anvil shaft, the knife carrier being displaced relative to the counter-knife or to the anvil or to the anvil shaft as part of the parallel offset is moved or offset laterally.
  • parallel offset of the knife carrier is to be understood in the context of the invention in particular as a parallel adjustment and/or parallel displacement of the knife carrier, in which each point of the knife carrier geometry is offset by the same amount and in the same direction in relation to itself.
  • the knife is held on the knife carrier during infeed, so that when the knife carrier is adjusted in parallel, each point of the knife along the cutting edge or cutting edge of the knife, i.e. in the longitudinal direction of the knife, is adjusted by the same amount or in relation to a position of the knife is moved by an equal amount in the direction of the cutting position before delivery.
  • this means that the cutting edge or cutting edge of the knife is preferably imaged parallel to itself during the parallel adjustment of the knife carrier.
  • the cutting edge or cutting edge of the knife runs parallel to the longitudinal axis of the knife shaft, this parallel course not being changed due to the parallel displacement of the knife carrier during infeed.
  • the blade carrier is preferably moved in a purely translatory or linear manner. In principle, however, a parallel offset cannot be ruled out, in which case the knife carrier is adjusted or offset along a curved path during the parallel adjustment.
  • the knife can preferably be advanced during the parallel adjustment of the knife carrier with the cutting angle remaining the same and/or without deformation.
  • the knife when the knife is advanced, there is no tilting, turning and/or no deformation of the knife or the knife flank, in particular not about an axis parallel to the shaft axis.
  • the inventive parallel adjustment of the knife carrier from a pre-cutting position to a cutting position, the position of the cutting edge or cutting edge of the knife relative to the counter-knife, the anvil or the anvil shaft does not change during infeed. If the knife acts in the cut against a rotating or stationary counter-knife, it is particularly the case during infeed through parallel offset of the knife carrier that the angle between the knife flanks of the interacting knives does not change.
  • the infeed path which can be achieved with the above-described known infeed by means of transverse forces exerted via adjusting screws, is achieved according to the invention by a parallel adjustment of the knife carrier. Due to the parallel adjustability of the blade carrier, it is in particular not necessary to transfer lateral forces to the blade flank in order to achieve this infeed path. In contrast to the known state of the art, in which the lateral forces transmitted for the infeed of the knife lead to a slightly wavy course of the knife in the longitudinal direction, the knife after the infeed according to the invention has a straight course due to the parallel offset of the knife carrier, which has a positive effect on the sectional image.
  • the blade carrier can be adjusted in parallel, it is not necessary to bend the blade to feed the blade, which can have a positive effect on the cutting pattern and improve the quality of the cut. Nevertheless, it cannot be ruled out that for a fine adjustment of the knife, in particular after a certain infeed path has been reached by parallel adjustment of the knife carrier, the knife held on the knife carrier may be deformed by means of transverse force transmission to a knife flank, for example via adjusting screws.
  • a “parallel adjustability of the knife carrier” in the context of the invention is particularly preferably to be understood that the knife carrier when being adjusted along or parallel to a secant of a circumferential circle given by the circumferential line of the knife shaft in a cross-sectional view of the knife shaft and/or parallel to a tangent is adjusted or moved around the circumference.
  • the knife carrier can be arranged to be movable laterally and/or transversely to the longitudinal axis of the knife shaft.
  • the knife carrier is preferably adjusted or displaced at right angles to a straight line which runs through the center point of the knife shaft and through the cutting edge or cutting edge of the knife.
  • the term "parallel offset of the blade carrier” is to be understood in relation to mutually facing, preferably flat, blade flanks of the blade on the one hand and a counter blade interacting with the blade on the other.
  • the knife flanks pointing towards one another can meet when the knife shaft is rotating and in the pre-cutting position of the knife.
  • the blade flanks pointing to one another can preferably be aligned parallel to one another or the blade flanks pointing to one another can be aligned at an angle to one another, so that a specific cutting angle results. If the blade carrier is then adjusted in parallel, starting from the pre-cutting position of the blade, the orientation of the blade flanks pointing towards one another remains at least essentially the same, in particular consistently parallel or while maintaining the cutting angle.
  • the parallel offset of the blade carrier preferably has no influence on the alignment of the blade flanks pointing towards one another.
  • At least one clamping and/or holding means is provided in order to fasten or hold the knife carrier on the knife shaft.
  • the tensioning and/or holding means is preferably designed to permit a parallel adjustment of the knife carrier when it is held on the knife shaft with a specific tensioning and/or holding force. Before it is finally fixed on the knife shaft, the knife carrier is thus held on the knife shaft so that it can be adjusted or moved in parallel via the clamping and/or holding means. If the blade carrier has been adjusted to a predetermined cutting position, provision is preferably made to fix the blade carrier in this cutting position against further adjustment. For this purpose, the holding and/or tensioning force, which is transmitted by the tensioning and/or holding means or at least one further tensioning and/or holding means, can be increased until the knife carrier is fixed in the exact position.
  • the clamping and/or holding device serves to prevent the knife carrier from becoming unintentionally released from the knife shaft during the parallel offset or infeed of the knife and a rotation of the knife shaft, but allows a parallel adjustment of the knife carrier in such a way that an infeed starting from a pre-cutting position of the knife into the cutting position is possible.
  • At least one clamping device is preferably provided in order to generate a defined pre-tensioning force with which the knife carrier is held on the knife shaft in the pre-cutting position of the knife.
  • the biasing force is sufficiently low to a To ensure parallel adjustability of the knife carrier starting from the preliminary cutting position of the knife into the cutting position.
  • the clamping and/or holding means can reach through the blade carrier in areas, so that the blade carrier is connected, in particular screwed, to the blade shaft via the clamping means.
  • the blade carrier can have a recess through which the holding and/or clamping means extends through the blade carrier.
  • the blade carrier can thus be held and/or braced on the blade shaft via the clamping and/or holding means, in particular with the holding and/or clamping means being able to be fixed to the blade shaft, preferably screwed to it.
  • the tensioning and/or holding means can be designed, for example, as a tensioning screw, with which the blade carrier is screwed to a holding and/or fastening section of a support body of the blade shaft.
  • the tightening torque or tightening torque with which the screw connection of the blade carrier is tightened on the blade shaft is then sufficiently low to allow parallel adjustment of the blade carrier, starting from the preliminary cutting position of the blade into the cutting position.
  • This torque can be transferred to the clamping device with an adjustable, suitable torque wrench. If the knife carrier has reached a position in which the knife is exactly delivered, the clamping force can be increased or a larger torque can be transmitted, so that the knife carrier is fixed in this position on the knife shaft.
  • the recess in the blade carrier is preferably designed as a slot or other elongated material recess, via which the clamping and/or holding means reaches through the blade carrier and can be connected to the blade shaft.
  • a large number of recesses, in particular oblong holes can be provided over the length of the blade carrier or in the axial direction of the blade shaft, in which clamping and/or holding means engage in order to secure the blade carrier on the blade shaft over the entire extent of the blade carrier in the direction the longitudinal axis of the knife shaft to hold or brace parallel adjustable.
  • the blade shaft can have at least one retaining and/or Have attachment portion.
  • the knife carrier is arranged or mounted in parallel on the holding and/or fastening section so that it can be adjusted.
  • a support or base body of the blade shaft can have a flat holding and/or fastening section which extends transversely to the longitudinal direction of the blade shaft and which can form a flat surface section.
  • the blade carrier is then held or arranged in a parallel-adjustable manner on the holding and/or fastening section.
  • the holding and/or fastening section can form a secant in the cross section of the cutter shaft, which interrupts the otherwise circular cross section of the cutter shaft or the support body. This enables a simple and cost-effective design of the holding and/or fastening section on the blade shaft. No complex geometries, such as edge shapes or round surfaces, have to be incorporated into the supporting body.
  • a support body of the blade shaft can be mechanically machined uniformly along a plane, preferably by milling.
  • the holding and/or fastening section can also be designed as a groove in the supporting body of the cutter shaft, preferably extending over the entire length of the cutter shaft.
  • holding and/or fastening sections can also be provided for fastening several knife carriers arranged at a distance from one another in the circumferential direction of the knife shaft, preferably with the holding and/or fastening sections being distributed essentially symmetrically over the circumference of the knife shaft.
  • a blade carrier can then preferably be fastened in a parallel adjustable manner to each holding and/or fastening section.
  • an adjusting device for adjusting the knife carrier is provided with at least one adjusting means, in particular an adjusting screw, with an adjusting force being able to be transmitted to the knife carrier via the adjusting means, in particular for fine adjustment, in order to adjust the knife carrier in parallel.
  • the adjusting device preferably enables stepless parallel adjustment of the knife carrier or knife.
  • the adjusting device can be provided in addition to a tensioning device of the type described above, in particular an adjusting screw being able to be provided as the adjusting means and with an adjusting force being exerted via the adjusting means the knife carrier and/or the knife can be transferred for fine adjustment of the knife carrier before fixing the knife carrier with the clamping device.
  • a fine adjustment can provide a parallel adjustment of the knife carrier in small adjustment ranges, in particular in the range of less than 1 mm, more particularly in the range of less than 0.5 mm or even less than 0.1 mm.
  • the adjusting means can preferably be provided in addition to the clamping means described above. With the clamping means, the knife carrier is held on the knife shaft so that it can be adjusted in parallel and, after an exact cutting position has been reached, fixed in the cutting position by increasing the clamping force.
  • the adjusting means of the adjusting device preferably enables a fine adjustment of the knife carrier before it is fixed in place, with the knife carrier being adjusted from a pre-cutting position to the exact cutting position with the adjusting means before the exact cutting position is reached and then with the clamping and/or holding means described above Increasing the clamping force is fixed.
  • the adjustment means can particularly preferably be designed as an additional tensioning means with which a tensioning force or adjustment force can be transmitted to the knife carrier in the secant or tangential direction, ie transversely to the longitudinal axis of the knife shaft.
  • the adjusting means is preferably designed as an adjusting screw of a tensioning device.
  • other constructive solutions are also possible here, for example compression springs.
  • the adjusting means preferably acts on the knife carrier from the side, in particular in order to be able to realize a stepless parallel adjustment of the knife carrier.
  • other technical solutions are also possible.
  • adjusting means can be provided, which can be arranged on different sides of the knife carrier, in order to enable a parallel adjustment of the knife carrier in two opposite directions, if necessary, preferably for fine adjustment.
  • adjusting means in particular adjusting screws, can be provided which act on the blade carrier.
  • a hydraulic and/or pneumatic adjustment means can also be provided be.
  • the use of adjustment means supported by an electric motor is also possible.
  • the adjusting means can preferably interact with at least one counter element, for example a lock nut, in particular as a securing means, in order to hold the adjusting means on the knife carrier and/or to finally fix the knife carrier in an operational cutting position.
  • a lock nut in particular as a securing means
  • the adjusting means is preferably fastened or held on the knife shaft.
  • the knife shaft can have a further holding section.
  • the knife carrier can then be adjusted laterally or parallel with the adjusting means relative to the central longitudinal axis of the knife shaft for fine adjustment.
  • the adjustment means can also be held or formed on the knife carrier, so that an adjustment force can be transmitted to the knife held on the knife carrier with the adjustment means in order to enable fine adjustment.
  • the knife is then delivered with the adjusting means, for example relative to the knife carrier.
  • a holding area can be formed on and/or on the holding and/or fastening section of the cutter shaft or can be fastened in the form of a separate, particularly strip-shaped holding part which is connected to the cutter shaft and is designed to hold and/or guide the adjusting means.
  • the holding area can extend as a strip-shaped projection in the longitudinal direction of the cutterhead, in particular over the entire length of the cutterhead.
  • the holding area can have a through hole, in particular a threaded hole, via which the adjustment means can be passed through the holding area. An adjusting force can then be transmitted laterally to the knife carrier via the adjusting means.
  • the knife carrier can be arranged so that it can be adjusted in parallel between two holding areas, so that it is possible to use at least two adjustment means guided through the holding areas on different sides of the knife carrier to move the knife carrier in one or the other adjustment direction, if necessary, for fine adjustment.
  • the adjusting means can also be held and/or fastened to the knife carrier.
  • the blade carrier can have a through hole with an internal thread, into which the adjustment means is screwed in. If the adjustment means penetrates the knife carrier, the adjustment means can act against a holding and/or fastening section of the knife shaft that is formed and/or fastened to the knife shaft, with the holding and/or fastening section serving as a counter bearing for the adjustment means during the fine adjustment of the knife carrier.
  • a middle, in particular strip-shaped, holding and/or fastening section can be formed and/or fastened to the cutter shaft, with the knife carrier having two holding projections and/or holding legs arranged on different longitudinal sides of the holding and/or fastening section, through which at least one adjusting means is screwed in each case.
  • the free ends of the adjusting means can act against different longitudinal sides of the holding and/or fastening section on the cutter shaft, with the holding and/or fastening section on the cutter shaft serving as a counter bearing for the adjusting means provided on opposite longitudinal sides.
  • adjusting means can be arranged one behind the other and/or spaced apart from one another in the axial direction of the cutter shaft in order to transmit a lateral adjusting force to the cutter carrier for fine adjustment of the cutter carrier.
  • several adjusting means can be provided one behind the other in the axial direction of the blade shaft, in particular equally spaced, which are held in pairs on the blade carrier or on the blade shaft in order to adjust the blade carrier in opposite directions if necessary during fine adjustment.
  • the knife is held and/or fixed in a stable and positionally fixed manner on the knife carrier in a fastening and/or clamped state, preferably wherein the knife carrier can have a clamping element, in particular wedge-shaped and/or strip-shaped, with which the knife is held in a clamped manner on the knife carrier.
  • a clamping element in particular wedge-shaped and/or strip-shaped
  • the blade carrier has a groove-shaped recess which extends in the longitudinal direction and in which the blade and the clamping element are accommodated.
  • the groove-shaped recess has two flanks which, in particular, converge in a wedge shape, the depth of the groove being limited by a groove bottom.
  • the clamping element can have at least one through bore, through which a fastening means, preferably a screw, is guided, which can be screwed into a threaded bore in the knife carrier.
  • a plurality of through bores, fastening means and threaded bores are preferably provided, which are more preferably arranged equidistantly from one another. This enables the knife to be securely fixed to the knife carrier over the entire length of the knife.
  • the clamping element and thus the knife are fixed in the knife holder by screwing the fastening means to the knife holder.
  • the clamping element can be interrupted in the longitudinal direction, so that a clamping means, as described above, can be clamped, in particular screwed, to the knife shaft in the area of an interruption in the clamping means in order to hold the knife carrier on the knife shaft and/or on the knife shaft so that it can be displaced in parallel to fix. Free access to the clamping device from the outside is then guaranteed in the area of the interruption.
  • the cross cutter according to the present invention has a knife shaft and a further knife shaft, alternatively an anvil or an anvil shaft, the further knife shaft or the anvil or the anvil shaft interacting with the knife shaft for cutting and the knife shaft and/or the further knife shaft is or are formed according to one of the preceding claims.
  • a synchro cross cutter can have two knife shafts, with at least one knife shaft being designed according to the invention.
  • the knives of the knife shafts are rotated during operation and come into cutting engagement in pairs during rotation in order to cut through a continuous web of material in the transverse direction.
  • a cutter shaft designed according to the invention and a fixed cutter cooperating with the cutter held on the cutter shaft can be provided. If the cross cutter is designed to carry out a crushing cut, a cutter shaft designed according to the invention is preferably provided, which interacts with an anvil shaft having an anvil.
  • the present invention also relates to a method for feeding a knife to a knife shaft for cutting, in particular cross-cutting, material webs, in particular material webs made of paper, cardboard and/or plastic, the knife being fastened to a knife carrier which is adjustably held on the knife shaft and whereby the knife is fed via a parallel adjustment of the knife carrier.
  • the knife carrier with the knife received or fixed thereon is pretensioned and/or held with a holding force in a pre-cutting position of the knife via at least one tensioning and/or holding means on the knife shaft, the pretensioning force and/or holding force being a Allows parallel adjustment of the knife carrier.
  • the knife carrier is preferably pretensioned on the knife shaft by means of at least one tensioning means, preferably a tensioning screw;
  • the knife shaft can then be rotated, preferably counterclockwise, until the knife carrier is adjusted in parallel by the knife coming into contact with a counter knife of another knife shaft or with an anvil of an anvil shaft and the knife carrier is adjusted in parallel or parallel shifted until the knife is in a cutting position is placed;
  • the knife carrier After reaching the cutting position of the knife, the knife carrier is fixed in the cutting position by applying a higher clamping force or locking force to the clamping and/or holding means on the knife shaft. It is fixed in particular by tightening the same clamping means that was also used to initiate the pre-tensioning force in the pre-cutting position of the knife; - If necessary, in the next step a sample cutting process is carried out to check the cutting position;
  • the knife carrier is adjusted in parallel by a specific adjustment path by the knife coming into contact with a counter-knife of another knife shaft or with an anvil of an anvil shaft, the knife carrier being initially preset to a pre-cutting position of the knife.
  • a fine adjustment of the knife can be provided by an additional parallel displacement of the knife carrier with an adjusting means until the knife carrier reaches the final cutting position and is then fixed in the final cutting position;
  • the knife and possibly a counter-knife can be wetted with a grinding paste before the system is rotated against the running direction at a certain speed or in a certain time window. After that, another or further fine adjustment can be made, and this process can be repeated as often as you like. This is a great advantage, especially with comparatively pointed knife edges, the adjustment of which used to be very time-consuming.
  • running direction with reference to an associated shaft—can mean counterclockwise rotation, with which the cross cutter is usually operated.
  • the term opposite to the running direction preferably defines a clockwise rotation.
  • the tightening torque or tightening torque with which the clamping and/or holding means is tightened is checked in order to ensure sufficient locking force for fixing the knife carrier after the knife has reached the cutting position.
  • FIG. 1 shows a schematic representation of a cutter block according to the invention with a parallel adjustable cutter carrier
  • FIG. 2 shows a detailed view of the knife shaft shown in FIG. 1 in the cutting area with another knife shaft, with a knife of the knife shaft being in a pre-cut position or basic setting position;
  • Fig. 3 shows the detailed view shown in Fig. 2, with the knife being in a cutting position
  • FIG. 4 shows a knife shaft with a parallel adjustable knife carrier according to a further or second embodiment
  • FIG. 5 shows a knife shaft with a parallel adjustable knife carrier according to a further or third embodiment.
  • a knife shaft 1 for cutting, in particular transverse cutting, of material webs, in particular material webs made of paper, cardboard and/or plastic.
  • a knife carrier 2 is held in parallel and adjustable.
  • a knife 3 is fastened to the knife carrier 2, preferably by clamping. The knife 3 can thus be advanced from a pre-cutting position into a cutting position via a parallel adjustment of the knife carrier 2 .
  • the knife shaft 1 is part of a cross cutter 4 which, in addition to the knife shaft 1, also has a further knife shaft 5 with a further knife 6 or counter-knife.
  • the further knife shaft 5 has no knife carrier 2 , with the further knife 6 being held in a clamped manner, preferably via a clamping element 7 , on the further knife shaft 5 .
  • the further cutter shaft 5 can also be equipped with a cutter carrier 2 of the type according to the invention or can be designed as a cutter shaft 1 according to the invention.
  • the further blade shaft 5 can also be designed as an anvil shaft with a corresponding anvil, which is operatively connected to the blade 3 for cutting.
  • the following is based on Figs. 2 and 3 the delivery of the knife 3 by parallel adjustment of the knife carrier 2 is explained.
  • the blade 3 is advanced from the pre-cutting position shown in FIG. 2 to a cutting position shown in FIG. As shown in FIG. 2, the knife 3 is aligned at the beginning of the infeed in such a way that the knife 3 assumes a collision position as a pre-cutting position.
  • the knife 3 or the cutting edge of the knife 3 is in a lateral offset, the knife 3 colliding with the further knife 6 or with the counter-knife when the knife shaft 1 rotates, preferably clockwise.
  • the knife carrier 2 is clamped and/or held on the knife shaft 1 in such a way that the knife carrier 2 is adjusted in parallel or laterally due to the contact of the knife 3 with the other knife 6, so that the knife 3 moves as shown in Fig. 3 takes cutting position.
  • the parallel adjustment of the blade carrier 2 from the pre-cutting position to the cutting position takes place laterally to the longitudinal axis of the blade shaft 1 and along an adjustment direction that is identified by the arrow 8 in FIG.
  • the parallel alignment of the blade flanks 22, 23 of the blades 3, 6 preferably does not change.
  • the geometric arrangement of knife 3 and counter-knife 6 remains unchanged when the knife carrier 2 is parallel offset from the pre-cutting position to the cutting position, so that the cutting angle of the knife 3, in particular the angle of inclination of the knife 3 relative to the counter-knife 6, also does not change.
  • the blade 3 interacts with an anvil or an anvil shaft at the location of a counter blade 6 .
  • the speed during rotation of the blade shaft 1 is significantly slower than the rotational speed during the cutting process and is in particular directed in the opposite direction to the direction of rotation in the cutting process.
  • Clamping means 10 preferably clamping screws, are provided for clamping the knife carrier 2 on the knife shaft 1.
  • the knife carrier 2 preferably extends in the longitudinal direction over the length of the knife shaft 1.
  • a plurality of clamping means 10 for clamping the blade carrier 2 is provided in the longitudinal direction of the blade shaft 1 .
  • the blade carrier 2 is preferably clamped in such a way that parallel adjustment of the blade carrier 2 is still possible even in a clamped state. Accordingly, the clamping means 10 preferably pass through recesses of the blade carrier 2, which are preferably designed as slots (not shown).
  • the blade carrier 2 is held pretensioned on the blade shaft 1 via the clamping means 10 on the one hand, but the recesses, which are preferably designed as slots, continue to provide a possibility for parallel adjustment of the blade carrier 2 realized.
  • clamping means designed as plate springs can be used.
  • An adjusting device 11 with at least one adjusting means 12 is provided in order to carry out a preferably stepless fine adjustment of the knife 3 by further parallel displacement of the knife carrier 2 .
  • the adjusting device 11 has a strip-shaped holding part 13 which extends in the longitudinal direction of the blade shaft 1.
  • the adjusting means 12 is held in the holding part 13 , preferably screwed through the holding part 13 .
  • the adjusting means 12 is an adjusting screw.
  • the holding part 13 can be designed as a strip-shaped projection on the outer circumference of the blade shaft 1 or is a separate component which is firmly connected to the blade shaft 1 .
  • two adjustment devices 11 are provided, each with at least two adjustment means 12 with associated holding parts 13, which act on both longitudinal sides of the knife carrier 2 and transmit corresponding adjustment forces to the knife carrier 2.
  • the knife carrier 2 is arranged between opposing adjusting means 12 and held in a displaceable manner.
  • parallel adjustment of the knife carrier 2 in two opposite directions of adjustment is possible.
  • several adjusting means 12 can be provided one behind the other, which are arranged on both sides of the blade carrier 2 and preferably run at equidistant distances from one another. By actuating the adjustment means 12, the blade carrier 2 can be finely adjusted accordingly.
  • the knife carrier 2 is held displaceably in parallel on a flat surface section 24 of the knife shaft 1 (FIG. 1).
  • the surface section 24 is formed in the circumferential direction of the blade shaft 1 essentially in the manner of a secant, with a flat holding and/or fastening surface on which the blade carrier 2 can be displaced in parallel.
  • the holding parts 13 are connected to the surface section 24 or integrally formed on the blade shaft 1 .
  • the holding parts 13 can be connected to the cutter shaft 1 in a positive, non-positive and/or material connection.
  • the blade 3 is preferably held and/or fixed in a fixed position on the blade carrier 2 in a fastening and/or clamped state.
  • the blade carrier 2 in the embodiment shown has a groove-shaped recess in which the blade 3 is accommodated.
  • the groove-shaped recess has a first flank 14 and a second flank 15, which preferably runs obliquely towards the first flank 14, the depth of the groove being limited in the radial direction by a groove base 16.
  • At least one threaded bore 17 oriented substantially perpendicularly to the groove base 16 is preferably provided in the groove base 16 .
  • the blade 3 is fastened or held in the groove.
  • a clamping element 18 of essentially complementary design is provided for this purpose.
  • the clamping element 18 has a substantially trapezoidal shape in cross section.
  • the clamping element 18 has at least one through bore, through which a fastening means 19, preferably a fastening screw, which is screwed into the threaded bore 17 of the knife carrier 2, is guided.
  • the clamping element 18 is braced with the fastening means 19 in the recess, as a result of which the knife 3 is clamped and fixed in its position.
  • the fastening means 19 for fixing the clamping element 18 in the longitudinal direction of the knife carrier 2 is arranged offset to the clamping means 10.
  • the clamping element 18 is preferably interrupted in the longitudinal direction of the knife carrier 2, in particular in the region of the clamping means 10, in order to ensure that the clamping means 10 are accessible from above.
  • the clamping means 10 for clamping the blade carrier 2 on the blade shaft 1 are provided laterally offset from the clamping element 18.
  • the clamping element 18 can run continuously or without interruption in the longitudinal direction of the knife 3, whereas the clamping means 10 are accessible due to the lateral offset, preferably via the top or outside of the knife carrier 2.
  • the clamping means 10 can be of any design can, preferably helically or as disc springs.
  • the adjusting means 12 designed as adjusting screws, are passed through threaded holes in the knife carrier 2.
  • the adjustment means 12 are arranged on both sides of a preferably strip-shaped holding and/or fastening section 20 which is formed and/or molded onto the cutter shaft 1 and/or fastened in the form of a separate holding and/or fastening element.
  • the holding and/or fastening section 20 serves as an abutment for the adjusting means 12 when these are screwed through the knife carrier 2 and act against the longitudinal sides of the holding and/or fastening section 20.
  • a groove-shaped recess 21 is provided in the central area of the knife carrier 2, so that the knife carrier 2 forms a guide section 25 on the longitudinal side of the holding and/or fastening section 20, through which the adjustment means 12 are guided.
  • adjustment forces can be transmitted to both sides of the knife carrier 2 via the adjustment means 12, with the adjustment means 12 being supported against the central holding and fastening section 20 on the knife shaft 1.
  • fastening means 19 for bracing a clamping element 18 are also provided in the embodiment shown in Fig. 5 or the knife 3 is provided.
  • the fastening means 19 are arranged laterally offset in the longitudinal direction of the blade shaft 1 in relation to clamping means 10 for clamping the blade carrier 2 on the blade shaft 1 .
  • adjusting means 12 acting laterally on the holding and/or fastening section 20 and clamping means 10 acting radially can be provided in alternation.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

L'invention concerne un arbre porte-lame (1) pour couper, en particulier couper transversalement, des bandes de matériau, en particulier des bandes de matériau de papier, de carton et/ou de matière plastique, comprenant un porte-lame (2) pour une lame (3), le support de lame étant maintenu mobile sur l'arbre de lame (1), la lame (3) pouvant être avancée au moyen d'un décalage parallèle du porte-lame (2).
PCT/EP2022/070375 2021-08-31 2022-07-20 Arbre porte-lame Ceased WO2023030749A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102021122480 2021-08-31
DE102021122480.2 2021-08-31
DE102021131925.0 2021-12-03
DE102021131925.0A DE102021131925A1 (de) 2021-08-31 2021-12-03 Messerwelle

Publications (1)

Publication Number Publication Date
WO2023030749A1 true WO2023030749A1 (fr) 2023-03-09

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PCT/EP2022/070375 Ceased WO2023030749A1 (fr) 2021-08-31 2022-07-20 Arbre porte-lame

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TW (1) TW202313293A (fr)
WO (1) WO2023030749A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB439039A (en) * 1933-06-19 1935-11-25 Goss Printing Press Co Ltd Improvements in or relating to cutter mechanisms for the webs of printing presses
US3247746A (en) * 1964-07-02 1966-04-26 Paper Converting Machine Co Cut-off device
EP0559077A1 (fr) * 1992-03-06 1993-09-08 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif de réglage d'une lame de couteau sur un cylindre d'un appareil de pliage
US6244151B1 (en) * 1998-06-11 2001-06-12 Tamarack Products Inc. Apparatus for adjusting cutting bar
WO2019051516A1 (fr) * 2017-09-15 2019-03-21 Andritz Ag Procédé de découpe transversale d'une bande de matière déplacée le long d'une direction de déplacement et dispositif associé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB439039A (en) * 1933-06-19 1935-11-25 Goss Printing Press Co Ltd Improvements in or relating to cutter mechanisms for the webs of printing presses
US3247746A (en) * 1964-07-02 1966-04-26 Paper Converting Machine Co Cut-off device
EP0559077A1 (fr) * 1992-03-06 1993-09-08 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif de réglage d'une lame de couteau sur un cylindre d'un appareil de pliage
US6244151B1 (en) * 1998-06-11 2001-06-12 Tamarack Products Inc. Apparatus for adjusting cutting bar
WO2019051516A1 (fr) * 2017-09-15 2019-03-21 Andritz Ag Procédé de découpe transversale d'une bande de matière déplacée le long d'une direction de déplacement et dispositif associé

Also Published As

Publication number Publication date
TW202313293A (zh) 2023-04-01

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