EP3941697A1 - Tambour à lames - Google Patents

Tambour à lames

Info

Publication number
EP3941697A1
EP3941697A1 EP20712237.5A EP20712237A EP3941697A1 EP 3941697 A1 EP3941697 A1 EP 3941697A1 EP 20712237 A EP20712237 A EP 20712237A EP 3941697 A1 EP3941697 A1 EP 3941697A1
Authority
EP
European Patent Office
Prior art keywords
knife
holding
support body
fastening
drum
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.)
Pending
Application number
EP20712237.5A
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
Application filed by BW Papersystems Hamburg GmbH filed Critical BW Papersystems Hamburg GmbH
Publication of EP3941697A1 publication Critical patent/EP3941697A1/fr
Pending 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
    • 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
    • B26D7/2614—Means for mounting the cutting 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
    • 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
    • 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 drum for cutting, in particular cross-cutting, of material webs, in particular material webs made of paper, cardboard and / or plastic, with a, for example, cylindrical support body, on the circumference of which several spaced apart in the circumferential direction of the support body and essentially in the longitudinal direction of the Support body extending elongated holding and / or fastening sections are designed for fastening a preferably strip-shaped knife arrangement.
  • the invention also relates to a fastening system with a knife drum.
  • Knife drums of the type in question are used, for example, in cross-cutting machines.
  • Such cross cutters are used to make incisions and / or perforations in transported, moving material webs transversely to their conveying or transport direction.
  • the material web With the cross cutter, the material web can be cut one or more times, whereby sheets of the same and / or different lengths can be produced from the material web.
  • the running material web can be provided with one or more transverse perforations.
  • the material web can be webs made of paper, cardboard, plastic or metal foil, fabric and other materials.
  • two knife drums are provided which are rotatably arranged one above the other in a machine frame, the knives of which come into cutting engagement in pairs during rotation in order to cut through a continuous material web in the transverse direction.
  • “Convoy cross cutters” have a rotatably arranged knife drum and a fixed knife that interacts with this. In the so-called “crush cut”, a knife of a knife drum comes into contact with an anvil of an anvil drum.
  • the knife In order to realize a "wandering" cut through the material web from one side to the other, the knife usually does not run in the axial direction, i.e. not axially parallel to the axis of rotation of the cutterhead, but at a so-called offset or twist angle with respect to the axis of rotation, so that one end of the knife is offset in the circumferential direction with respect to its other end and is therefore always in a position leading to the other end.
  • a flattened surface section can be created on the circumference of a, for example, cylindrical support body of the knife drum by a material-removing method be formed which extends in the longitudinal direction of the support body axially parallel to its longitudinal axis and forms a plane for fastening a strip-shaped knife holder.
  • This plane is spanned across the radius and limited in the direction of rotation of the support body by a leading longitudinal edge and a trailing longitudinal edge.
  • the two named longitudinal edges extend from one side to the other side of the support body, axially parallel to its axis of rotation.
  • a segment is cut away from the circumference of the support body, so that a flat plane is created which enables the arrangement of a straight, cuboid blade strip at a desired offset angle relative to the direction of the axis of rotation in a simple manner.
  • a knife drum of the type mentioned is known, the knife drum having a cylindrical body, on the circumference of which a flattened, elongated surface section deviating from its rotational shape and extending essentially in the longitudinal direction of the cylindrical body is formed, on which a strip-shaped knife arrangement extending essentially in the longitudinal direction of the roller-shaped body can be attached.
  • the elongated surface section runs in the longitudinal direction of the roller-shaped body essentially in a partially helical manner, and the strip-shaped knife arrangement can be shaped essentially in a correspondingly partially helical manner.
  • partially helical is to be understood as meaning that the angle of twist with respect to the direction of the axis of rotation is significantly smaller than 360 ° in contrast to a full helix.
  • the surface section which has an essentially partially helical course, allows the surface section to be adapted in a simple and at the same time skilful manner to the shape of the strip-shaped knife arrangement which it will later carry.
  • the object of the present invention is to develop and make available a knife drum of the type mentioned at the beginning, which allows the elimination of cutting problems in a structurally simple manner with little effort, and in particular the replacement of the knife drum should be dispensable.
  • the invention is also based on the object of providing a fastening system for fastening a knife running at an angle to the axis of rotation on a knife drum, which enables cutting problems to be eliminated when a cross-cutting machine is not idle for a short time.
  • the invention relates to a knife drum for "traveling" cutting, in particular cross-cutting, of material webs, in particular material webs made of paper, cardboard and / or plastic, with a, for example, cylindrical, triangular or T-shaped support body, on the circumference of which several in the circumferential direction of the support body spaced apart from one another and extending essentially in the longitudinal direction of the support body, elongated holding and / or fastening sections are provided for fastening a preferably strip-shaped knife arrangement.
  • the knife drum has at least two holding and / or fastening sections that run differently at least in sections in the longitudinal direction of the support body.
  • knife arrangements can be fastened in a simple manner, the knives of which have a different course in the longitudinal direction of the support body.
  • the holding and / or fastening surfaces of the holding and / or fastening sections preferably also show a correspondingly different course.
  • offset angle for straight holding and / or fastening sections or “twist angle” for partially helical holding and / or fastening sections is in the context of the invention based on the angle between the axis of rotation of the support body and the course of the holding and / or Fastening section in the longitudinal direction of the support body. If the cutting edge of a partially helical knife is shown in an unwound state, a straight line with a constant slope is obtained as a helical line, as is also known, for example, from screws.
  • the angle of twist is related to the angle between the axis of rotation of the support body and the unwound helical line.
  • the “offset angle” or “twist angle” is based on the angle between the axis of rotation of the support body and a center line of a holding and / or fastening surface of a holding and / or fastening section in the longitudinal direction of the support body.
  • the course of the holding and / or fastening section in the longitudinal direction of the supporting body preferably corresponds to the cutting edge course of a knife connected to the supporting body via the holding and / or fastening section during the cutting process.
  • the cutting forces occurring in the cross-section increase.
  • the force flow can be changed as a function of the angle, with a suitable angle being determined in particular as a function of the material composition and / or the material thickness.
  • offset or twist angles in the range from 0.1 ° to 10 °, preferably from 2 ° to 5 ° have proven to be advantageous.
  • Particularly suitable is an embodiment in which the offset or twist angle for a holding and / or fastening section is between 0.1 ° to 5 °, preferably between 0.5 ° and 2 °, more preferably between 1 ° to 1.5 ° , and in a further holding and / or fastening section between 1 ° and 10 °, preferably between 2 ° and 8 °.
  • a knife change is no longer required the cutterhead provided. Rather, the knife arrangement used on the knife drum can be detached or removed from a first holding and / or fastening section of the knife drum - without removing the knife drum. To eliminate the cutting problem, a knife arrangement can then be fastened or mounted on a further holding and / or fastening section of the knife drum, the knife of which has a different course at least in sections in the longitudinal direction of the support body. In this way, if cutting problems occur that are due to a non-optimal course of the knife in the longitudinal direction of the support body, a process interruption in material processing can be significantly shortened, which leads to lower costs for sheet production.
  • the same knife drum can be used in a structurally simple manner with little effort and with little changeover time for different cuts and purposes, especially for cutting webs made of different materials use.
  • the term “knife arrangement” is a preferably strip-shaped knife or a preferably strip-shaped knife holder designed to attach at least one knife or a combination of both with positive and / or non-positive locking on the knife holder, for example by means of screws and / or to be understood as cohesive, for example via an adhesive connection, attached knife and / or a knife that can be attached to the support body via the knife holder.
  • the knife holder can be screwed to the support body and / or clamped or fixed on the support body via clamping elements.
  • the knife can be designed as a continuous bar or from several in In the longitudinal direction of the support body there are knife elements lying in alignment one behind the other.
  • the knife can, for example, be clamped to the knife holder using clamping means and / or screws and / or screwed to the knife holder using fastening screws, as disclosed in EP 0 986 453 B1, for example.
  • An adhesive connection can also be provided.
  • An embodiment possible according to the invention, in which a knife is clamped in a recess of the support body via a knife holder, is described in EP 0 995 560 A2.
  • a clamping wedge of a knife arrangement can be used, which is inserted into the Recess is screwed.
  • the knife arrangement can preferably be detachably connected to a holding and / or fastening section in a non-destructive manner, for example by means of mechanical anchoring means such as clamping means and / or screws. An adhesive connection is also not excluded.
  • the holding and / or fastening sections can be designed, for example, as surface sections that are at least partially flattened on the circumference of the support body.
  • the holding and / or fastening sections can in particular be incorporated into the support body by a material-removing process.
  • a holding and / or fastening section is formed on and / or in a separate component, which is preferably detachably connected to the support body in a non-destructive manner, for example screwed. The component then forms a holding and / or fastening section of the knife drum.
  • the knife arrangement is preferably made of metal and / or a metal alloy.
  • the support body is preferably also made of metal and / or a metal alloy.
  • the holding and / or fastening sections preferably extend over the entire length of the support body.
  • a knife arrangement can be fixed to the supporting body, which extends over the entire length of the supporting body. If the knife arrangement extends only over a partial length, the knife arrangement can, if necessary, be fixed to the holding and / or fastening section at different distances from the ends of the support body. However, it is also not excluded that the holding and / or fastening sections only extend over a partial length of the support body.
  • a plurality of holding and / or fastening sections of the support body run in the longitudinal direction of the support body in a different, partially helical manner with at least some sections of different slopes or different angles of twist.
  • the knife arrangement is also to be designed to be essentially partially helical and / or is set up for fastening a knife with a certain partially helical course.
  • At least two holding and / or fastening sections on the support body run in different partially helical shapes in the longitudinal direction of the support body with different slopes over the entire length of the support body.
  • the term “partially helical” is to be understood as meaning that the holding and / or fastening section in the circumferential direction of the supporting body performs less than one complete rotation about the longitudinal axis of the supporting body.
  • the holding and / or fastening section preferably extends in the circumferential or direction of rotation of the support body over a circumferential angle of significantly less than 180 ° around the longitudinal axis of the support body, preferably over a circumferential angle of significantly less than 45 °.
  • the holding and / or fastening section can have an outer fastening surface which, in addition to a torsion around its longitudinal axis, is additionally bent by the said offset angle, so that a concave shape of the outer fastening surface results.
  • the partially helical course of the holding and / or fastening sections prevents at least a substantial weakening of the support body. The original strength and rigidity of the support body remains essentially unaffected.
  • the knife arrangement shows a course in the longitudinal direction of the support body which preferably at least substantially corresponds to the course of the holding and / or fastening section.
  • a wandering cut can be realized by a partially helical shape of the knife arrangement, in particular the cutting edge of the knife. With a “moving cut”, the material web is cut from one side to the other. A moving cut can effectively reduce the cutting forces and thus the wear on the cutting edge and the cutterhead.
  • an embodiment can also be provided in which the holding and / or fastening section does not run in the longitudinal direction of the support body in a partially helical manner, but in a straight line. This allows the attachment of a straight knife arrangement at a desired offset angle with respect to the direction of the axis of rotation of the support body.
  • At least one holding and / or fastening section is designed as a groove that preferably extends over the entire length of the support body.
  • a strip-shaped knife arrangement which is partially helical in accordance with the course of the groove can be fastened.
  • Elements for mechanically locking and / or aligning the knife arrangement and / or for locking and / or aligning a cutting edge of a knife of the knife arrangement can be provided.
  • This can be, for example, fastening and / or locking screws.
  • the screws can preferably be evenly distributed over the length of the holding and / or fastening section or arranged equidistant from one another in order to ensure a uniform contact pressure when fastening a knife.
  • a groove-shaped holding and / or fastening section can in principle also be designed to receive a knife arrangement which has a different course in the longitudinal direction of the support body than the groove-shaped holding and / or fastening section.
  • the holding and / or fastening sections as recesses in the outer circumference of the support body, in particular as longitudinal grooves in the knife drum, the knife arrangement can be attached to or in a holding and / or fastening section with little installation and time expenditure fasten the cutterhead.
  • a groove can serve as a guide here, so that the positioning of the knife arrangement is simplified. For example, it may be possible to insert the knife arrangement vertically (in the radial direction) from the outside into the groove.
  • the knife arrangement can, however, also be pushed into the holding and / or fastening section in the longitudinal direction of the support body. Conversely, when the knife arrangement is changed, it can be lifted vertically out of the groove or pulled out or pushed out in the longitudinal direction from the holding and / or fastening section.
  • the groove can be machined into the support body of the knife drum or a lateral surface of the support body by a removal process, in particular by milling.
  • the depth of the groove can preferably be in the range from 2 to 100 mm, preferably in the range from 2 to 50 mm. This ensures that the knife arrangement is held securely and that high material removal is avoided.
  • the holding and / or fastening sections are particularly preferably designed as longitudinally extending grooves in the outer circumference of the support body and have a course that is different from one another at least in sections in the longitudinal direction of the support body.
  • Particularly preferably, at least two grooves are provided, which show a different partially helical course in the longitudinal direction of the support body.
  • knives with a different course in the longitudinal direction of the support body can be held or fastened to the knife drum in a simple manner.
  • a straight groove and at least one groove as a holding and / or fastening section could also be provided in the knife drum, which groove does not run in a straight line in the longitudinal direction of the knife drum, but in particular is partially helical.
  • At least one holding and / or fastening section can be designed as a flattened surface section which, as described in DE 10 2005 058 600, forms a secant that interrupts the otherwise circular cross-section of the support body.
  • This enables a simple and inexpensive design of the holding and / or fastening section on the support body. It doesn't have to complex geometries, such as edge shapes or round surfaces, can be incorporated into the supporting body. Rather, the support body can be machined in a uniform mechanical abrasive manner along a plane, preferably by milling.
  • a knife arrangement that can be fastened on the secant-shaped holding and / or fastening section can run in a straight line in the longitudinal direction and be designed for fastening a knife that runs in a straight line.
  • a knife arrangement designed to accommodate a partially helical knife can also be attached to a secant-shaped holding and / or fastening section, for example by means of suitable clamping and / or spacer pieces.
  • the holding and / or fastening sections can be arranged distributed essentially symmetrically over the circumference of the support body. In particular, a uniform concentricity of the knife drum during the cutting process can be achieved in this way.
  • the course of the knife arrangement and in particular of a cutting knife in the longitudinal direction of the support body can be adapted to the course of the holding and / or fastening section. This enables stable fastening of the knife arrangement to the holding and / or fastening section. With a corresponding course of the holding and / or fastening section, the knife arrangement can then run partially helically in the longitudinal direction of the supporting body or in a straight line with an offset angle relative to the direction of the axis of rotation of the supporting body.
  • a knife arrangement in the operating state of the knife drum, that is to say during the cutting process, can preferably be fastened to only one holding and / or fastening section.
  • a counterweight can preferably be attached to at least one other holding and / or fastening section. The center of gravity of the knife drum is shifted by the counterweight.
  • the counterweight is preferably attached to a holding and / or fastening section and / or has a geometry and / or mass such that the knife drum essentially rotates about its center of mass when cutting the material web.
  • An alternative embodiment of the invention relates to a fastening system with a knife drum, in particular of the type described above, and with at least one knife holder that can be fastened to at least one holding and / or fastening section of a support body of the knife drum, the knife holder being designed to hold differently offset parts as required - or angles of twist relative to the axis of rotation of the support body extending knives.
  • the aforementioned aspect in turn serves to avoid changing the cutterhead when cutting problems occur.
  • This alternative embodiment relates to the use of a knife holder which is designed and set up to hold a plurality of different knives, that is to say a different course in the longitudinal direction of the support body.
  • clamping, spacing or fastening means such as screws, can be used if necessary.
  • the knife holder itself is fastened to a holding and / or fastening section of the support body of the knife drum, preferably as described above in connection with the knife drum according to the invention.
  • a further alternative embodiment of the invention relates to a fastening system with a knife drum, in particular of the type described above, with at least two knife holders that can be fastened to at least one holding and / or fastening section, preferably to a plurality of holding and / or fastening sections of the support body
  • the first knife holder is designed to hold a first knife or is preferably detachably connected to a first knife which runs at a first offset or twist angle with respect to the axis of rotation of the support body
  • a second knife holder is designed to hold a second knife or is preferably detachable with a second knife is connected, which runs at a different second offset or twist angle with respect to the axis of rotation of the support body.
  • This embodiment relates to the use of at least two differently designed knife holders, each one knife carry or hold, the knives of the two knife holders differing in terms of the course of the knives in the longitudinal direction or the respective offset or twist angle to the axis of rotation of the support body.
  • two differently designed holding and / or fastening sections can be provided on the support body, preferably as described above in connection with the knife drum according to the invention. In principle, however, it is also possible that only one holding and / or fastening section is provided for fastening the knife holder.
  • the knife holders are thus designed and set up for attachment to the same holding and / or attachment section of the support body as required.
  • FIG. 1 shows a perspective view of a knife drum according to the invention with two holding and / or fastening sections arranged equidistantly on a, for example, roller-shaped support body of the knife drum, the twist angle of a partially helical holding and / or fastening section being shown graphically,
  • FIG. 2 shows an illustration of the development of a holding and / or fastening section of the knife drum shown in FIG. 1 in relation to the mill line of the holding and / or fastening section,
  • FIG. 3 shows a cross-sectional view of a further embodiment of a knife drum according to the invention, a knife being clamped in a holding and / or fastening section and 4 shows a schematic view of a further embodiment of the knife drum according to the invention with a knife arrangement and a counterweight provided opposite the knife arrangement.
  • the same reference numerals are used for identical and similar components, resulting in corresponding properties and features, even if the description is not repeated.
  • Fig. 1 shows a perspective view of a knife drum 1 according to the invention for cutting, in particular cross-cutting, of material webs, in particular material webs made of paper, cardboard and / or plastic, with a cylindrical support body 2.
  • the knife drum 1 is used in cross-cutting machines for sheet production from paper or Cardboard webs are used.
  • Such cross-cutting machines usually comprise two knife drums 1 rotatably mounted one above the other in a machine frame, the knives of which come into cutting engagement in pairs as they rotate.
  • a first (front according to FIG. 1) holding and / or fastening section 3 and a second (rear according to FIG. 1) holding and / or fastening section 4 are formed as each groove-shaped recess.
  • the two holding and / or fastening sections 3, 4 are arranged opposite one another on the support body 2 and are distributed essentially equidistantly over the circumference 2a of the support body 2.
  • the groove base of the two recesses forms two holding and / or fastening surfaces 3a, 4a of the two holding and / or fastening sections 3, 4.
  • the holding and / or fastening surfaces 3a, 4a are used for fastening in the longitudinal direction of the support body as required 2 differently extending knife arrangements 5 formed and provided on the support body.
  • the holding and / or fastening section 3 has a leading and a trailing longitudinal edge in the direction of rotation of the support body 2, which have the same profile in the longitudinal direction of the support body 2 and thus run parallel to one another.
  • the holding and / or fastening surface 3a has a center line or helical line 17, which preferably corresponds to the course of a knife 11, in particular the course of the cutting edge, which can be fastened in the holding and / or fastening section 3 (cf. . 3).
  • helical line 17 is shown developed, a straight line is obtained (developed helical line 18 according to FIG. 2) which corresponds to the gradient of the helical line 17.
  • the angle between the axis of rotation of the support body 2 and the unwound helical line 18 is referred to below as the twist angle g.
  • the abscissa of the coordinate system shown in Fig. 2 indicates the extension of the developed helical line 18 in the circumferential direction of the support body 2, the ordinate corresponds to the length of the developed helical line 18 in the longitudinal direction of the support body 2.
  • the twist angle g corresponds to the angle between the ordinate (longitudinal axis of the Support body 2) and the unwound helical line.
  • the holding and / or fastening section 3 can alternatively also be designed as a groove running in a straight line in the longitudinal direction of the support body 2.
  • the holding and / or fastening section 3 extends only over part of the circumference of the support body 2.
  • the helical line 17 completes less than one complete rotation about the axis of rotation of the support body.
  • the helical line 17 preferably extends over less than half the circumference, preferably over less than a quarter of the circumference of the supporting body 2. Consequently, the value n in FIG. 2 takes a value greater than 1, preferably greater than 2, preferably greater as 4.
  • the twist angle g advantageously corresponds to a value between 0.1 ° and 10 °.
  • the holding and / or fastening surface 4a of the second holding and / or fastening section 4 runs at a different twist angle g over the circumference 2a of the support body 2 than the opposite holding and / or fastening surface 3a of the first holding and / or fastening section 3. This enables the attachment of knife arrangements 5 to the support body 2, which have a different (partially helical) course in the longitudinal direction of the support body 2.
  • a further embodiment of a knife drum 1 according to the invention with two different holding and / or fastening sections 3, 4 is shown.
  • the groove-shaped recesses in the circumference 2 a of the support body 2 each have a first side wall 7 and a second side wall 8, which are spaced from one another in the circumferential direction of the support body 2.
  • the side walls 7 and 8 preferably run towards one another in a wedge shape, the depth of the groove being radial Direction is limited by the groove bottom 9.
  • the two holding and / or fastening sections 3, 4 thus have a trapezoidal cross section.
  • at least one threaded bore 10 is provided which is oriented essentially perpendicular to the groove base 9.
  • a steel strip 16 can be inserted into the groove, for example, on one side, on both sides, on the underside or as a lining.
  • a knife arrangement 5 is fastened or held in the second holding and / or fastening section 4.
  • the knife arrangement 5 consists of a knife 11 and a clamping element 12 which is essentially complementary to the groove-shaped holding and / or fastening section 4.
  • the clamping element 12 has an essentially trapezoidal shape in cross section.
  • the clamping element 12 has at least one through-hole through which a screw 13 is guided, which screw is screwed into a threaded hole 10 in the support body 2.
  • the tensioning element 12 is drawn into the groove-shaped holding and / or fastening section 4 by the screw 13.
  • several screw connections are preferably provided, which are more preferably arranged equidistant from one another.
  • a knife arrangement 5 can alternatively be fastened in the first holding and / or fastening section 3.
  • the exemplary embodiment described above preferably relates to an upper knife shaft with an adjustable knife 11.
  • a knife 11 can also be clamped non-adjustable on a lower knife shaft.
  • the previously described fastening of the knife arrangement 5 to the holding and / or fastening section 4 is therefore to be understood as an example and is not limited to the fastening means described.
  • the knife arrangement 5, i.e. the knife 11 does not run axially parallel to the axis of rotation of the support body 2, but runs at a twist angle to the rotation axis of the support body 2.
  • the knife 11 preferably has the same course in the longitudinal direction as the Holding and / or fastening section 4.
  • the holding and / or fastening sections 3, 4 run according to the course of the knife 1 1 partially helically under a Angle of twist g to the longitudinal axis of the support body 2.
  • the holding and / or fastening sections 3, 4 otherwise have a mutually different course in the longitudinal direction.
  • only one knife arrangement 5 is preferably fastened to one of the two holding and / or fastening sections 3, 4 for the operation of the knife drum 1.
  • FIG. 4 shows a further embodiment of a knife drum 1 with two holding and / or fastening sections 3, 4 opposite one another on its circumference 2a.
  • a flattened surface section which deviates from its rotational shape and extends in the longitudinal direction of the support body 2 is provided, which forms the holding and / or fastening surfaces 3a, 4a .
  • the holding and / or fastening surfaces 3a, 4a are strip-shaped and have a substantially straight or planar cross-section in order to be able to accommodate a knife arrangement 5, shown only schematically, with its underside.
  • the holding and / or fastening surfaces 3a, 4a thus generate a secant in the cross section of the support body 2, which interrupts the circular cross section of the support body 2 and an axially parallel to the axis of rotation of the support body 2 extending in the longitudinal direction of the support body 2 or possibly also partially helical Section forms for fastening the knife arrangement 5.
  • the holding and / or fastening surfaces 3a, 4a make it possible to use a straight knife of the knife arrangement 5 at an offset angle To fasten the axis of rotation of the support body 2 to the support body 2 or possibly also a partially helical knife of the knife assembly 5 at a helix angle to the axis of rotation of the support body 2.
  • the holding and / or fastening surfaces 3a, 4a can be on a longitudinal edge or on both Be limited by a lateral paragraph 6 longitudinal edges.
  • the knife arrangement 5 then preferably rests against the shoulder 6 in the fastened state.
  • the shoulder 6 facilitates the positioning of a knife arrangement 5 on a holding and / or fastening section 3, 4. The assembly of a knife arrangement 5 can thus be carried out within a short time with little effort.
  • a knife arrangement 5 is fastened to the first holding and / or fastening section 3.
  • the knife arrangement 5 is shown only schematically in FIG. 4 and can have a strip-shaped knife 1 1, a strip-shaped knife holder or a knife 1 1 attached to a knife holder.
  • the knife arrangement 5 is fastened to the support body 2 by mechanical fastening means (not shown).
  • Preferably 5 fastening screws are used to fasten the knife arrangement.
  • other releasable connecting means are also possible.
  • the knife arrangement 5 is additionally or alternatively glued to the holding and / or fastening section 3.
  • a schematically shown counterweight 15 can be fastened to the second holding and / or fastening section 4.
  • the counterweight 15 is preferably designed such that the knife drum 1 essentially rotates about its center of mass during the cutting process. By arranging the counterweight 15 opposite to the knife arrangement 5, imbalances during operation of the measuring drum 1 can be reduced and the service life of the knife drum 1 can be extended.

Landscapes

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

Abstract

L'invention concerne un tambour à lames (1) destiné à couper, notamment à couper transversalement, des bandes de matériau, en particulier des bandes de matériau en papier, carton et/ou plastique, comprenant un corps de support (2), sur la périphérie duquel sont prévues plusieurs sections de maintien et/ou de fixation (3, 4) allongées, espacées les unes des autres dans la direction périphérique du corps de support (2) et s'étendant sensiblement dans la direction longitudinale du corps de support (2), conçues pour fixer à chaque fois un agencement de couteaux (5) de préférence en forme de bande. Selon l'invention, les sections de maintien et/ou de fixation (3, 4) présentent une allure au moins partiellement différente l'une de l'autre dans la direction longitudinale du corps de support (2).
EP20712237.5A 2019-03-20 2020-03-10 Tambour à lames Pending EP3941697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019107063.5A DE102019107063A1 (de) 2019-03-20 2019-03-20 Messertrommel
PCT/EP2020/056340 WO2020187647A1 (fr) 2019-03-20 2020-03-10 Tambour à lames

Publications (1)

Publication Number Publication Date
EP3941697A1 true EP3941697A1 (fr) 2022-01-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20712237.5A Pending EP3941697A1 (fr) 2019-03-20 2020-03-10 Tambour à lames

Country Status (5)

Country Link
EP (1) EP3941697A1 (fr)
JP (1) JP2022525956A (fr)
CN (1) CN113748003B (fr)
DE (1) DE102019107063A1 (fr)
WO (1) WO2020187647A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112776047B (zh) * 2021-02-05 2024-07-23 常州麦鲜生电器有限公司 一种具有导料功能的滚筒刀具组件及手摇滚筒切菜器

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DE747678C (de) * 1935-07-09 1944-10-09 Heinz Schwiening Querschneider mit umlaufenden Messerwalzen zum Schneiden von Papier, Pappe o. dgl.
DE933010C (de) * 1953-01-09 1955-09-15 Bruderhaus Maschinen Gmbh Querschneider zum Schneiden von fortlaufenden Bahnen aus Papier oder anderen Stoffen
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DE1611770A1 (de) * 1968-02-24 1971-01-28 Jagenberg Werke Ag Querschneider mit umlaufenden Messern
CA991073A (fr) * 1972-03-07 1976-06-15 Herve And Fils Papeteries Du Sentier (Societe Anonyme) Dispositif de coupe ou de perforations pour bande de deroulant en continu
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EP2353810A1 (fr) * 2010-02-04 2011-08-10 Müller Martini Holding AG Dispositif destiné au traitement d'une bande de matériau
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DE102014117850B4 (de) * 2014-12-04 2020-03-19 Hochland Se Querschneiden eines in Transportrichtung bewegten Lebensmittelbandes

Also Published As

Publication number Publication date
WO2020187647A1 (fr) 2020-09-24
CN113748003B (zh) 2023-04-28
JP2022525956A (ja) 2022-05-20
CN113748003A (zh) 2021-12-03
DE102019107063A1 (de) 2020-09-24

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