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
  • B26D1/56—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
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
  • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
  • B23D25/12—Shearing machines with blades on coacting rotating drums
• • 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
  • B26D1/0006—Cutting members therefor
• • 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
• • 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
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
• • 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
  • B26D7/18—Means for removing cut-out material or waste
  • B26D7/1818—Means for removing cut-out material or waste by pushing out
• • 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
  • B26D1/0006—Cutting members therefor
  • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades
• • 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
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
  • B26D2007/082—Guiding or pushing a web into a favorable position by deflector means

Definitions

• the invention relates to a method for cross cutting one along a
• Moving direction moving material web in particular a pulp web or the like, wherein the material web between two approximately perpendicular to
• Moving direction aligned axes of rotation is moved through which axes of rotation cooperating blades are moved with a rotational movement, which the material web in a passage between the
• the invention relates to a device for cross-cutting a material web moved along a movement direction with at least two interacting cutting edges which are arranged approximately perpendicular to the direction of movement
• Rotation axes are rotatable, wherein the material web is movable between the rotation axes, so that the material web is separated by the cutting approximately transversely to the direction of movement.
• Double-shaft cross cutters have proven themselves for the production of cut edges of high quality. Furthermore, in such devices, a longer life of the cutting is achieved than in devices in which a first blade is and only a second blade is moved. In addition, there is also a noise and
• a cellulosic web is moved between cutting rollers which rotate in opposite directions and synchronously, so that the continuously moving material web is then cut transversely to the direction of movement, when arranged on the cutting rollers cutting a
• a length of a thereby cut sheet of Material web is thus dependent on the one hand by a speed of the material web in the direction of movement and on the other hand by a peripheral speed of
• Cutting rollers and a number of arranged on the cutting rollers blades or blades are provided.
• a speed of the cutting rollers is thus substantially due to a speed of the material web along the
• Cutting rollers and a number or a distance of the arranged on the cutting rollers cutting is substantially defined.
• the object of the invention is to provide a method of the type mentioned, with which a moving material web into pieces
• This object is achieved by a method of the type mentioned, in which after a separation of the material web a force on a mitbewegten with a cutting edge, in particular a voltage applied to a cutting edge, part of the web is applied to the web of the rotational movement of the cutting edge to solve.
• the applied force is released from the cutting edge.
• the applied force which is usually at least partially in a direction from an axis of rotation of the cutting roller from which the material web is released to the material web out
• This contact force can in particular from a relative speed between the cutting edge and material web, a stiffness of the material web and constructive
• Material web-acting contact force is therefore usually opposite to the direction of movement and the cutting roller out, with which cutting roller, the cutting edge is connected, against which the material web.
• a force which in a concrete device in magnitude and direction to
• the force is applied pneumatically. This can be done for example via an air nozzle, a fillable air hose and / or a cylinder operated with air pressure.
• the force is applied hydraulically.
• this can be done along a surface on which the material web after a separation is present, in particular be provided on a rear surface of the cutting edge, movable punch, which is actuated by a hydraulic cylinder.
• a corresponding device such as an air nozzle or a hydraulic cylinder can be arranged co-rotating with the cutting roller or fixed in the device. If a co-rotating device is used, this is usually set up for releasing the material web from the cutting roller, with which the device co-rotates.
• a method according to the invention is implemented by the blades rotating in opposite directions.
• the cutting edges separating the material web have a peripheral speed in the direction of movement of the material web, so that a relative speed between the cutting edges and the material web in the engaged position is as small as possible.
• Circumferential direction can be made, which corresponds approximately to the speed of the material web in the direction of movement, and in a special operation longer sheets are produced by reducing a rotational speed of the cutting rollers, without leading to an increase in the risk of failure of the system by a jam.
• a device of the type mentioned in which a device is provided, with which on a mitbewegten with a cutting edge, in particular a voltage applied to a cutting edge, part of the material web, a force can be applied to those with the cutting edge comoving
• the force can be applied in any way in order to detach the material web from a movement with the cutting edge or from a movement of a cutting roller on which the cutting edge is arranged.
• a frictional force is overcome with the applied force, which acts between the material web and the rear surface of the cutting edge.
• the force is oriented at least partially radially to the axis of rotation of the cutting edge and away from this axis of rotation, from which cutting edge the material web is released.
• the device has a spring which is arranged such that the spring is stretched during normal operation of the device by a relative movement of the two blades before the blades reach an engagement position in which separate the cutting the web.
• the spring is usually connected to the cutting roller of the corresponding blade in such a way that the spring can be tensioned in the radial direction.
• the spring in the radial direction is preferably corresponding to the first corresponding one
• Cutting roller positioned or connected to the corresponding, usually a leading, cutting edge usually such that the cutting edge of the second cutting roller, which normally carries the trailing edge, the spring in the radial direction pushes inwards so that it is stretched before the blades reach the engaged position.
• the cutting edges are arranged in such a way that the cutting edges are spaced apart in an engagement position in the direction of movement, so that one cutting edge forms a leading cutting edge and a cutting edge forms a trailing cutting edge.
• a distance in the direction of movement can also be less than 1 mm. This easily achieves a high quality cut edge and at the same time prevents the blades of the blades from hitting each other and damaging each other during an engagement.
• the device for applying a force to a moving along with the leading edge part of the web is formed. It has been found that with a corresponding arrangement, the material web usually bears against the leading cutting edge and is moved along with it because the material web slides from an oblique rear face of the trailing cutting edge onto a rear face of the leading cutting edge. It is therefore advantageous if the device for applying a force to a moving along with the leading edge portion is formed to the web to release the web from the leading edge.
• a particularly reliable release of the material web from the cutting edge is achieved when the leading cutting edge has an approximately radially aligned rear surface.
• the material web is then after performing a cut usually on the radially oriented rear surface of the leading edge and can be solved with the device reliably from this.
• the leading edge thus points
• the trailing edge has an approximately radially aligned to the corresponding cutting roller
• Front surface and arranged at a cutting angle of also less than 90 ° to the front surface rear surface, so that the material web from the rear surface of the trailing edge on the back surface of the leading edge can slide.
• the device is arranged on a rear surface of the cutting edge, in particular on a rear surface of the leading edge.
• the material web is then easily moved or pushed away in the radial direction from the rear face of the leading edge when the device is designed to apply a compressive force which acts at least partially in the radial direction.
• the cutting edges are arranged such that the cutting edges overlap in an engagement position in the radial direction. This ensures a reliable cut with high-quality cut edge through the material web. It is advantageous if the device is connected in the radial direction via a spring with the cutting edge contact element, which in particular from a
• wear-resistant material consists, has.
• the web is then solvable via the spring with the wear-resistant material of a movement with the rotating blade.
• the spring can be stretched over the wear-resistant material of the cutting edge, which cooperates with the cutting edge, with which the device
• the wear-resistant material projects beyond the cutting edge with which the device rotates, in a state in which the spring is not tensioned. This ensures that the material web is completely detached from the cutting edge when the spring is relaxed after the point of engagement.
• the wear-resistant material may be formed, for example, as consisting of a plastic cuboid, which is arranged radially on helical springs on a cutting roller in the direction of rotation of the cutting roller directly to a rear surface of the cutting edge and preferably extends over a width of the cutting roller on which the cutting edge is positioned.
• the device has a
• an electromagnet may be provided for applying a force in order to detach the material web from the cutting edge.
• the actuator is normally activated when the blades have passed the point of engagement to disengage the web from the cutting roller or blade.
• the device can also be designed for pneumatic actuation.
• the device for this purpose may have a nozzle via which a Compressed air is applied to the material web of a co-rotation with the cutting edge or to solve a movement of the cutting edge.
• the device can also be designed for hydraulic actuation.
• a hydraulic cylinder to the cutting edge, from which the material web is to be released, connected contact element may be provided, so that the material web is released via the hydraulic cylinder and the contact element with a radial force to the outside of the cutting edge.
• a particular simple embodiment of the device is possible if the device is designed to be actuatable via a centrifugal force and / or gravity.
• the device may have a radially movable element and be arranged on an upper cutting roller, which preferably has the leading edge, so that acting by the force acting on the radially movable element centrifugal force and gravity, a force radially outwards or down, with which a the cutting edge adjacent material web is released downwards from the cutting edge.
• the element is moved or tightened with an approach of the cutting edges before the engagement position with advantage by the second or trailing edge inward.
• FIGS. 1 to 3 each show a section through a part of a device for
• FIG. 1 is a time before a cross-section
• Fig. 2 an engagement position in which a cross-section or a separation of the material web 1 takes place
• Fig. 3 is a time after a cut
• cooperating cutting rollers 10, 11 are arranged, which rotate in opposite directions about axes of rotation, not shown, and in the engagement position shown in Fig. 2, the material web 1 transverse to the direction of movement 2 of the web 1 or separate.
• the approximately parallel axes of rotation are arranged above and below or on both sides of the material web 1 and aligned in the figures perpendicular to a plane, so that the usually driven by conveying means such as conveyor rollers web 1 is moved between the axes of rotation.
• the cutting edges 3, 4 of the cutting rollers 10, 11 are arranged offset, so that the cutting edge 3 of the rotating in Fig. 1 to 3 counterclockwise, upper
• Cutting roller 10 a leading edge 3 and the cutting edge 4 of the clockwise rotating, lower cutting roller 11 forms a trailing edge 4.
• Rear surface 6 are formed, avoided by a contact thereof in a section through the web 1.
• a flexible material web 1 which may be formed, for example, as a pulp web, transverse to
• the web of material 1 is pressed onto the back surface 6 of the leading edge 3 and can be moved with this leading edge 3 due to a contact force 12 between the material web 1 and the leading edge 3 as shown in FIG. This can cause the material web 1 is curved and forms a jam, whereby the manufacturing process must be stopped. As shown, the contact force 12 acting on the material web 1 is directed counter to the direction of movement 2 and towards the upper cutting roller 10.
• FIGS. 4 to 6 show schematically a device according to the invention as well as various states of a method according to the invention.
• the device is arranged here on a rear surface 6 of the leading edge 3 and comprises a spring formed here by way of example by a helical spring 7, which upon rotation of the
• Cutting rollers 10, 1 1 by a relative movement of the blades 3, 4 is stretched radially inwards. After the cutting rollers 10, 11 that shown in Fig. 5
• Screw spring 7 is applied, made of a wear-resistant material, preferably a wear-resistant plastic.
• a plurality of helical spring 7 can be arranged over the width of the device, that is perpendicular to the plane and parallel to the axis of rotation, to a corresponding length trained contact element 8 correspondingly resiliently store, so that over the entire width of a force for releasing the material web 1 can be applied.
• FIG. 7 shows an exemplary embodiment of a device according to the invention, in which the device has a spring formed by an elastic element 9.
• the elastic element 9 is compressed during rotation of the cutting rollers 10, 11 by the trailing edge 4 to the point of engagement and relaxed after the point of engagement to apply a radial force to the voltage applied to the rear surface 6 of the leading edge 3 material web 1 and the web. 1 from the leading edge 3 to solve.
• Fig. 8 shows a further embodiment of the invention, wherein the device comprises a hose 13 which can be filled with air.
• the tube 13 is filled with air in this embodiment of the invention, so that it forms a spring, which before reaching an engagement position by an interaction of the two blades 3, 4 and a
• Fig. 9 shows a further embodiment of the invention.
• the device comprises a hydraulic element 14, which can be actively actuated or tensioned on the trailing edge 4 to apply a force in the radial direction to the material web 1 after reaching the engagement position and to release them from the leading edge 3.
• Fig. 10 shows another embodiment of the invention.
• an actively operable knife holder 15 is provided on the leading edge 3.
• a force for releasing the material web 1 from the leading edge 3 is thus at Operation of the knife holder 15 is applied at a retraction of the leading edge 3 after the engagement position over a trailing portion of the upper cutting roller 10, so that the material web 1 is released by the trailing portion of the upper cutting roller 10 of the leading edge 3.
• the device has an elastic cover plate 16.
• the elastic cover plate 16 is stretched by an interaction of the two cutting rollers 10, 11 and moved radially inwards before the engagement position is reached and relaxed after reaching the engagement position, so that on the elastic cover plate 16, a force on the material web 1 radially outward, from the leading edge 3 bearing upper
• FIG. 12 shows a further embodiment of the invention, in which the device comprises a nozzle 17 connected to a compressed air line 18, via which compressed air can be applied to the material web 1 after the engagement position has been reached.
• the material web 1 is thus achieved in such a device formed by compressed air from the leading edge 3.
• Fig. 13 shows a further embodiment of the invention, in which the device comprises a radially movable element 19 relative to the upper cutting roller 10, which carries the leading edge 3, which is moved radially outward to an engagement position by centrifugal force and gravity to the Material web 1 of the leading edge 3 push away.
• FIGs. 14 and 15 show further embodiments of the invention, in which the
• Lever 20 may be formed differently long to apply a radial force to the outside on the web 1 and to release them from the cutting edge.
• the device in the illustrated embodiments is disposed respectively on the upper cutter roller 10, it will be understood that it may also be positioned on the lower cutter roller 11 to disengage the web 1.
• a transverse cutting of a material web 1 in different lengths, in particular in pulp production is made possible, on the one hand an advantageously smooth cut and, on the other hand, a minimal risk of congestion and low noise development.
• Material web 1 of the cutting edge 3 via an applied force is reliably prevented jamming of the material web 1 and thus a blockage of an entire system.
• the method and the device according to the invention are thus also suitable for wide material webs 1 with a speed in the direction of movement 2 of more than 100 m / min. This makes it possible to use a double-shaft cross cutter for different blade lengths in a simple manner.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Treatment Of Fiber Materials (AREA)
• Shearing Machines (AREA)
• Paper (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=63142906

Family Applications (1)

Country Status (11)

Families Citing this family (3)

Family Cites Families (11)

• 2017
  • 2017-09-15 AT ATA50777/2017A patent/AT520462A1/de not_active Application Discontinuation
• 2018
  • 2018-07-26 BR BR112019023809-3A patent/BR112019023809A2/pt not_active Application Discontinuation
  • 2018-07-26 RU RU2020100780A patent/RU2760202C2/ru active
  • 2018-07-26 CN CN201880048646.3A patent/CN111051024A/zh active Pending
  • 2018-07-26 US US16/632,807 patent/US20210154873A1/en not_active Abandoned
  • 2018-07-26 EP EP18752088.7A patent/EP3681680A1/de not_active Withdrawn
  • 2018-07-26 CA CA3062557A patent/CA3062557A1/en not_active Abandoned
  • 2018-07-26 WO PCT/AT2018/060165 patent/WO2019051516A1/de active Search and Examination
  • 2018-09-13 UY UY0001037876A patent/UY37876A/es not_active Application Discontinuation
• 2019
  • 2019-11-26 CL CL2019003447A patent/CL2019003447A1/es unknown
• 2020
  • 2020-01-15 ZA ZA2020/00260A patent/ZA202000260B/en unknown

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