EP1057596B1 - Apparatus for adjusting the position of a cut-outs ejector and a cutting cylinder - Google Patents

Apparatus for adjusting the position of a cut-outs ejector and a cutting cylinder Download PDF

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Publication number
EP1057596B1
EP1057596B1 EP00108418A EP00108418A EP1057596B1 EP 1057596 B1 EP1057596 B1 EP 1057596B1 EP 00108418 A EP00108418 A EP 00108418A EP 00108418 A EP00108418 A EP 00108418A EP 1057596 B1 EP1057596 B1 EP 1057596B1
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EP
European Patent Office
Prior art keywords
ejector
cylinder
support
waste
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.)
Expired - Lifetime
Application number
EP00108418A
Other languages
German (de)
French (fr)
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EP1057596A2 (en
EP1057596A3 (en
Inventor
Edouard Borel
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Bobst Mex SA
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Bobst SA
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Publication date
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Publication of EP1057596A3 publication Critical patent/EP1057596A3/en
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Publication of EP1057596B1 publication Critical patent/EP1057596B1/en
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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
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1836—Means for removing cut-out material or waste by pulling 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/21—Out of contact with a rotary tool
    • Y10T83/2111—Mover is resiliently mounted
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/21—Out of contact with a rotary tool
    • Y10T83/2118—Stationary mover
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/217—Stationary stripper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2183—Product mover including gripper means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2207—Means to move product in a nonrectilinear path
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4836—With radial overlap of the cutting members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9461—Resiliently biased connection

Definitions

  • the present invention relates to a device for adjusting the position between a waste ejector and a material cutting cylinder in a band of a rotary cutter, this cylinder comprising at least one radial waste retaining needle protruding radially from its surface, said ejector having a rectilinear portion parallel to the generator of said cylinder, traversed by at least one slot coinciding with the trajectory of said radial needle for the passage of the latter.
  • one of two cutting cylinders between which the cardboard strip is cut has radial needles between the cutting nets, which sink in the waste during the cutting operation and separate them from the band by training them with the cylinder, while the band moves away from this cylinder following a horizontal path.
  • edges of these combs should be positioned with a large accuracy with respect to the cylinder. Indeed, if we leave a gap too large between the tops of the cutting nets and the edges of the combs, the waste of cardboard may pass between the comb and the net. This can lead to everything first a deformation of the comb and can also break the radial needle and so a net. The damage usually gets worse as and when rotation of the cylinder until the machine stops. If the difference is too much small, the comb may collide with a cutting net and to also cause chain damage until the machine stops.
  • the comb Since the comb is subjected to shocks whenever it waste and given the very low tolerances allowed for its positioning, it must not only position it with a very large accuracy, but also prevent it from vibrating, if not the two risks mentioned above may occur more or less simultaneously on different combs.
  • the object of the present invention is to remedy, at least in part, the aforementioned drawbacks.
  • this invention relates to a device for adjusting the position between a waste ejector and a material cutting cylinder in a band of a rotary cutter, as defined by claim 1.
  • the device according to the invention comprises few parts and is compact and economical. Its design in which the prestressed blades connecting the two parts of the support play the role of a slide without play, leads to a setting which is not dependent on a hysteresis effect and which has a excellent resolution.
  • This device has a very good rigidity as well static than dynamic in the three axes, including the one in which is made adjustment. Its static and dynamic torsional rigidity is high in the three axes.
  • the adjustment members of the device have orientations directed towards outside the machine, which are easily accessible. The setting and disassembly can be done using the same key, simplifying to the maximum the various interventions on the machine.
  • the cutting cylinders 1, 2 of FIG. cutting module of a rotary cutter which may comprise several modules side by side. Such rotary cutters are generally used to cut cardboard tape to make boxes Folding.
  • one of the two cutting cylinders 1, 2, preferably the lower cylinder 2 is provided with radial needles 8 which protrude radially outside a circle 9 corresponding to the trajectory described by the vertices cutting threads 4-6 around the axis of rotation of the cylinder 2.
  • radial needles 8 are appropriately positioned on the surface of the cylinder 2 at the locations where the cutting of the cardboard strip 7 produces waste 10.
  • these radial needles are pricked in the cardboard strip 7 simultaneously with the cutting of this waste 10, so that when the cardboard strip 7 continues its horizontal trajectory in the direction of the arrow F, the waste 10 is driven in a circular path around of the cylinder 2 in the direction of the arrow F 1 and is therefore separated from the cardboard strip 7.
  • FIG. a portion of the lower cutting cylinder 2 and a radial needle 8 on which a waste 10 is stung.
  • the comb 11 has a slot 11a, oriented perpendicular to its front edge 11b which is parallel to the generator of the cylinder 2.
  • This slot 11a is disposed on the circular path described by the radial needle 8 around the axis of rotation of the cutting cylinder 2, for allow the passage of the radial needle 8, so that the front edge 11b of the comb 11, can get very close to the trajectory 9 of the top of the nets of cuts 4-6, which allows him to engage between this trajectory 9 and the waste 8.
  • This comb 11 is positioned and fixed on a support 12 by screws of 13.
  • This support 12 is itself fixed to the frame (not shown) of the cutting machine via a guide rail or cross member 14 in engagement with a support wing 15 formed on the support 12, which allows to fix this last on the crossbar 14 by a screw 16.
  • the slot 11a of the comb 11 can be made to coincide with the circular path of the radial needle 8.
  • the support 12 comprises two parts, one 12a secured to the support wing 15, the other 12b secured to the comb 11. These two parts are connected to one another by two parallel bending blades 12c.
  • the respective planes of these bending blades 12c are substantially tangent to two circles concentric with the cutting cylinder 2, so that the portion 12b can move within the limit of the elastic deformation of the blades 12c, in the direction of the double arrow F 2 .
  • the parallel blades 12c are in a way a deformable parallelogram allowing them firstly to have a guiding role, defining a movement of the comb 11 along a path perpendicular to the edge 11b of this comb 11, which cuts the cylinder so that the distance between the edge 11b of the comb 11 and the cylinder 2 can be modified. Then these blades 12c play a role of return member in the limit of their elastic deformation, whose role will appear thereafter.
  • the part 12b of the support 12 has a thread 17 whose axis is perpendicular to the planes of flexion blades 12c.
  • a socket 18, threaded and threaded end, ending in a collar 18a at one end, is introduced into an opening of the fixed part 12a of the support 12, arranged coaxially with the 17.
  • This sleeve 18 is retained by its flange 18a and projects into a space 19 formed between the fixed part 12a and the mobile part 12b of the support 12.
  • a nut 20 is engaged on the threaded part of this sleeve 18 in order to fix to the fixed part 12a.
  • the internal thread of the socket 18 and the 17 of the part mobile 12b have different respective steps.
  • the step of tapping 17 is larger than that of the sleeve 18.
  • a set screw 21 has two successive threaded sections, an end section 21a, engaged in the tapping 17 of the movable part 12b and a section 21b engaged in the tapping of the bushing 18. Since the pitch of the tapping 17 is no longer large than that of the sleeve 18, when screwing the adjusting screw 21, it pulls the movable part 12b against the fixed part 12a of the support 12 by bending the 12c blades, thus removing the edge 11b of the comb 11 of the trajectory 9 of the edges of cutting nets 4-6.
  • the force exerted by the shocks produced during the meeting between a comb 11 and a waste 10, has no influence on the adjustment system. In Indeed, most of this force occurs in a direction substantially parallel to the blades 12c and has no significant influence, likely to produce micromovements by catching up the clearance between threads and internal threads of the adjusting system 17, 18, 21.
  • the difference in pitch between the threads 21a, 21b of the adjusting screw 21 produces a displacement of 0.25 mm between the part mobile 12b and the fixed part 12a, by turn of the adjusting screw 21, which corresponds to 0.7 ⁇ m for a rotation of 1 °.
  • the blades 12c have a thickness of 5 mm, a length of 28 mm and a width of 42 mm, corresponding to the width of the support 12. It is interesting to note that the length of parallel blades 12c is substantially equal to their width, which gives them excellent resistance to the twist.
  • supports 12 can be positioned on the along the crossing 14 according to the respective positions and the number of waste to be removed at each revolution of the cutting cylinder 2, each of these supports 12 carrying a comb 11 whose slot 11a coincides with a circular trajectory of a radial needle 8.
  • a sheet 22 extending over the entire length of the cylinders of cutting 1, 2 covers all the supports 12. It is located in the extension of the upper face of the comb 11. It makes it possible to protect the adjusting systems while facilitating the flow of waste 10, avoiding they do not cling for example to the slot 19.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Making Paper Articles (AREA)

Abstract

The cutting cylinder (2) has one or more radially projecting needles (8) for collecting waste from the cardboard cutting process, and an ejector (11) to remove the waste from the needles. The ejector has a straight section (11b) parallel to the generating surface of the cylinder and a slot (11a) aligned with the trajectory of the needle. A support (12) for the ejector has a first section (12a) fixed to the frame of the rotary cutter, and a second section (12b) which is fixed to the ejector and connected to the first section by guides (12c) with position regulators (17, 18, 21) and springs.

Description

La présente invention se rapporte à un dispositif pour régler la position entre un éjecteur de déchets et un cylindre de découpage de matériau en bande d'une découpeuse rotative, ce cylindre comportant au moins une aiguille radiale de retenue de déchets faisant saillie radialement à sa surface, ledit éjecteur présentant une partie rectiligne parallèle à la génératrice dudit cylindre, traversée par au moins une fente coïncidant avec la trajectoire de ladite aiguille radiale pour le passage de cette dernière.The present invention relates to a device for adjusting the position between a waste ejector and a material cutting cylinder in a band of a rotary cutter, this cylinder comprising at least one radial waste retaining needle protruding radially from its surface, said ejector having a rectilinear portion parallel to the generator of said cylinder, traversed by at least one slot coinciding with the trajectory of said radial needle for the passage of the latter.

Lorsque des déchets de carton sont séparés d'une bande au cours de son découpage pour la confection de boítes pliantes notamment, sur des découpeuses rotatives, il est indispensable d'éjecter ces déchets de manière contrôlée pour éviter qu'ils ne provoquent un bourrage. A cet effet, l'un des deux cylindres de découpage entre lesquels la bande de carton est découpée comporte des aiguilles radiales entre les filets de découpage, qui s'enfoncent dans les déchets lors de l'opération de découpage et les séparent de la bande en les entraínant avec le cylindre, alors que la bande s'éloigne de ce cylindre en suivant une trajectoire horizontale.When cardboard waste is separated from a strip during of its cutting for the manufacture of folding boxes in particular, on rotary cutters, it is essential to eject the waste in a checked to prevent them from causing a jam. For this purpose, one of two cutting cylinders between which the cardboard strip is cut has radial needles between the cutting nets, which sink in the waste during the cutting operation and separate them from the band by training them with the cylinder, while the band moves away from this cylinder following a horizontal path.

Ces déchets doivent ensuite être extraits de ces aiguilles radiales au cours de la rotation du cylindre pour libérer ces aiguilles radiales et leur permettre de s'enfoncer dans d'autres déchets lors de leur prochain passage dans la zone de découpage de la bande de carton. A cet effet, on dispose des éjecteurs en forme de peignes fixes à bords parallèles à la génératrice du cylindre, découpés pour leur permettre de s'approcher très près de la trajectoire des filets de découpage du cylindre tout en laissant passer les aiguilles radiales qui font saillie au-delà des sommets de ces filets de découpage. Les bords de ces éjecteurs peuvent ainsi s'insérer entre les sommets des filets de découpage et les déchets et les extraire des aiguilles radiales lorsque celles-ci s'écartent des éjecteurs suite à la rotation du cylindre. Un tel éjecteur est connu du document US-A-2 899 871.This waste must then be extracted from these radial needles during the rotation of the cylinder to release these radial needles and their allow to sink into other waste during their next visit in the cutting area of the cardboard strip. For this purpose, we have ejectors in the form of fixed combs with edges parallel to the generator of the cylinder, cut to allow them to get very close to the trajectory cutting threads of the cylinder while allowing the radial needles to pass which protrude beyond the tops of these cutting nets. The edges of these ejectors can thus be inserted between the tops of the nets of cutting and waste and extracting radial needles when these deviate ejectors following the rotation of the cylinder. Such an ejector is known from US-A-2,899,871.

Les bords de ces peignes doivent être positionnés avec une grande précision par rapport au cylindre. En effet, si on laisse un écart trop grand entre les sommets des filets de découpage et les bords des peignes, le déchet de carton risque de passer entre le peigne et le filet. Ceci peut entraíner tout d'abord une déformation du peigne et peut aussi casser l'aiguille radiale et donc un filet. Les dégâts s'aggravent en général au fur et à mesure de la rotation du cylindre, jusqu'à l'arrêt de la machine. Si l'écart est au contraire trop petit, le peigne risque d'entrer en collision avec un filet de découpage et d'entraíner également des dégâts en chaíne jusqu'à l'arrêt de la machine.The edges of these combs should be positioned with a large accuracy with respect to the cylinder. Indeed, if we leave a gap too large between the tops of the cutting nets and the edges of the combs, the waste of cardboard may pass between the comb and the net. This can lead to everything first a deformation of the comb and can also break the radial needle and so a net. The damage usually gets worse as and when rotation of the cylinder until the machine stops. If the difference is too much small, the comb may collide with a cutting net and to also cause chain damage until the machine stops.

Etant donné que le peigne est soumis à des chocs chaque fois qu'il rencontre un déchet et compte tenu des très faibles tolérances autorisées pour son positionnement, il faut non seulement le positionner avec une très grande précision, mais également l'empêcher de vibrer, sinon les deux risques susmentionnés peuvent se produire plus ou moins simultanément sur différents peignes.Since the comb is subjected to shocks whenever it waste and given the very low tolerances allowed for its positioning, it must not only position it with a very large accuracy, but also prevent it from vibrating, if not the two risks mentioned above may occur more or less simultaneously on different combs.

Pour garantir un fonctionnement sûr d'un éjecteur de déchets du type susmentionné, il faut pouvoir satisfaire un cahier des charges extrêmement rigoureux. Le positionnement du peigne doit pouvoir être effectué avec une tolérance ne dépassant pas ± 0,02 mm. Sa rigidité ne doit pas permettre de déplacement > 5 pm, même sous l'effet de chocs. Le peigne ne doit admettre aucune torsion quel que soit l'axe considéré.To ensure safe operation of a waste ejector above-mentioned type, it must be possible to meet a set of specifications extremely rigorous. The positioning of the comb must be able to be carried out with a tolerance not exceeding ± 0,02 mm. Its rigidity must not allow movement> 5 μm, even under the effect of shocks. The comb does must admit no torsion whatever the axis considered.

Pour pouvoir satisfaire la précision de positionnement susmentionnée, il est nécessaire d'avoir un système de réglage. Or les systèmes de réglage traditionnels supposent l'existence d'une glissière pour chaque axe de réglage. Par conséquent, l'élément mobile doit être bloqué sur la glissière une fois qu'il a atteint la position désirée, ce qui implique un déplacement par rapport à la position désirée, induit par le serrage. Il est donc nécessaire de procéder par itération et cette méthode répétitive et plus ou moins aléatoire présente le risque que l'on se contente finalement d'une précision approximative avec le danger que cela comporte.To be able to satisfy the positioning accuracy above mentioned, it is necessary to have an adjustment system. But the Traditional adjustment systems assume the existence of a slide for each axis of adjustment. Therefore, the mobile element must be blocked on the slide once it has reached the desired position, which implies a displacement relative to the desired position, induced by the tightening. It is therefore necessary to proceed by iteration and this repetitive method and more or less risky is the risk that one will finally be satisfied with a approximate accuracy with the danger that this entails.

L'utilisation de glissières en croix avec blocage, bien connue dans le domaine de la machine-outil, conduirait à une solution considérée comme chère dans le domaine de la fabrication de boítes pliantes et donc pas économiquement admissible. Il est enfin difficile d'avoir accès aux moyens de réglage selon les différents axes, sur une même face de l'organe à régler, ce qui rend l'opération de réglage difficile.The use of cross slides with locking, well known in the field of the machine tool, would lead to a solution considered as expensive in the field of manufacturing folding boxes and therefore not economically eligible. Finally, it is difficult to access the means of adjustment according to the different axes, on the same face of the body to be adjusted, this which makes the adjustment operation difficult.

Le but de la présente invention est de remédier, au moins en partie, aux inconvénients susmentionnés.The object of the present invention is to remedy, at least in part, the aforementioned drawbacks.

A cet effet, cette invention a pour objet un dispositif pour régler la position entre un éjecteur de déchets et un cylindre de découpage de matériau en bande d'une découpeuse rotative, tel que défini par la revendication 1. For this purpose, this invention relates to a device for adjusting the position between a waste ejector and a material cutting cylinder in a band of a rotary cutter, as defined by claim 1.

Le dispositif selon l'invention comporte peu de pièces et est compact et économique. Sa conception dans laquelle les lames précontraintes reliant les deux parties du support jouent le rôle d'une glissière sans jeu, conduit à un réglage qui n'est pas tributaire d'un effet d'hystérèse et qui a une excellente résolution. Ce dispositif présente une très bonne rigidité aussi bien statique que dynamique dans les trois axes, y compris celui dans lequel se fait le réglage. Sa rigidité en torsion statique et dynamique est élevée dans les trois axes. Les organes de réglage du dispositif ont des orientations dirigées vers l'extérieur de la machine, qui sont aisément accessibles. Le réglage et le démontage peuvent se faire à l'aide d'une même clef, simplifiant au maximum les diverses interventions sur la machine.The device according to the invention comprises few parts and is compact and economical. Its design in which the prestressed blades connecting the two parts of the support play the role of a slide without play, leads to a setting which is not dependent on a hysteresis effect and which has a excellent resolution. This device has a very good rigidity as well static than dynamic in the three axes, including the one in which is made adjustment. Its static and dynamic torsional rigidity is high in the three axes. The adjustment members of the device have orientations directed towards outside the machine, which are easily accessible. The setting and disassembly can be done using the same key, simplifying to the maximum the various interventions on the machine.

D'autres particularités et avantages apparaítront au cours de la description suivante d'une forme d'exécution de ce dispositif, illustrée schématiquement et à titre d'exemple par le dessin annexé dans lequel,

  • la figure 1 est une vue en élévation latérale de deux cylindres de découpage aux proportions volontairement faussées dans le but d'exposer le problème à résoudre;
  • la figure 2 est une vue latérale partielle agrandie d'un cylindre de découpage de la figure 1 avec la forme d'exécution du dispositif d'éjection objet de l'invention.
Other features and advantages will appear during the following description of an embodiment of this device, illustrated schematically and by way of example by the appended drawing in which,
  • Figure 1 is a side elevational view of two cutting cylinders deliberately distorted proportions in order to expose the problem to be solved;
  • Figure 2 is an enlarged partial side view of a cutting cylinder of Figure 1 with the embodiment of the ejection device object of the invention.

Les cylindres de découpage 1, 2 de la figure 1 constituent un module de découpage d'une découpeuse rotative qui peut comporter plusieurs modules côte à côte. De telles découpeuses rotatives sont généralement utilisées pour découper du carton en bande en vue de confectionner des boítes pliantes.The cutting cylinders 1, 2 of FIG. cutting module of a rotary cutter which may comprise several modules side by side. Such rotary cutters are generally used to cut cardboard tape to make boxes Folding.

Ces cylindres de découpage 1, 2, qui sont dans cet exemple du type du découpage par cisaillement, plus couramment désignés en tant que "Rotary Pressure Cut" ou RP comportent sur leurs surfaces respectives un réseau de filets de découpage 3, respectivement 4, 5, 6. Cette invention pourrait également s'appliquer dans le cas de cylindres de découpage par compression généralement désignés par le sigle CRC. Une bande de carton 7 défile horizontalement dans le sens de la flèche F, entre ces cylindres de découpage 1, 2 et est découpée lorsque deux filets de découpage 3, 4 de ces deux cylindres respectifs 1, 2 se trouvent dans la position relative illustrée par cette figure 1. These cutting cylinders 1, 2, which are in this example of type of shear cutting, more commonly referred to as "Rotary Pressure Cut" or RP have on their respective surfaces a network of cutting nets 3, respectively 4, 5, 6. This invention could also apply in the case of cutting cylinders by compression usually referred to as CRC. A strip of cardboard 7 scroll horizontally in the direction of arrow F, between these cylinders of cutting 1, 2 and is cut when two cutting nets 3, 4 of these two respective cylinders 1, 2 are in the relative position illustrated by this figure 1.

Les déchets de carton produits au cours du découpage doivent être éjectés de manière contrôlée pour éviter qu'ils ne provoquent des bourrages. A cet effet l'un des deux cylindres de découpage 1, 2, de préférence le cylindre inférieur 2, est muni d'aiguilles radiales 8 qui font saillie radialement à l'extérieur d'un cercle 9 correspondant à la trajectoire décrite par les sommets des filets de découpage 4-6 autour de l'axe de rotation du cylindre 2. Ces aiguilles radiales sont positionnées de manière appropriée à la surface du cylindre 2 aux endroits où le découpage de la bande de carton 7 produit des déchets 10. Ainsi, ces aiguilles radiales se piquent dans la bande de carton 7 simultanément au découpage de ce déchet 10, de sorte que lorsque la bande de carton 7 poursuit sa trajectoire horizontale dans le sens de la flèche F, le déchet 10 est entraíné dans une trajectoire circulaire autour du cylindre 2 dans le sens de la flèche F1 et est donc séparé de la bande de carton 7.Cardboard waste produced during cutting must be ejected in a controlled manner to avoid jamming. For this purpose one of the two cutting cylinders 1, 2, preferably the lower cylinder 2, is provided with radial needles 8 which protrude radially outside a circle 9 corresponding to the trajectory described by the vertices cutting threads 4-6 around the axis of rotation of the cylinder 2. These radial needles are appropriately positioned on the surface of the cylinder 2 at the locations where the cutting of the cardboard strip 7 produces waste 10. Thus, these radial needles are pricked in the cardboard strip 7 simultaneously with the cutting of this waste 10, so that when the cardboard strip 7 continues its horizontal trajectory in the direction of the arrow F, the waste 10 is driven in a circular path around of the cylinder 2 in the direction of the arrow F 1 and is therefore separated from the cardboard strip 7.

Il est évidemment indispensable au bon fonctionnement de la découpeuse que le déchet 10 soit détaché de l'aiguille radiale 8 pour que celle-ci puisse extraire un déchet à chaque tour du cylindre de découpage 2. Cette extraction du déchet 10 en vue de son éjection contrôlée est réalisée à l'aide d'un éjecteur en forme de peigne qui doit pouvoir s'insérer entre le filet 6 et le déchet 10.It is obviously essential to the proper functioning of the cutting machine that the waste 10 is detached from the radial needle 8 so that it can extract a waste at each turn of the cutting cylinder 2. This extraction of the waste 10 with a view to its controlled ejection is carried out using a comb-shaped ejector which must fit between the net 6 and the waste 10.

Un tel peigne 11 est illustré par la figure 2 sur laquelle on retrouve une portion du cylindre de découpage inférieur 2 et une aiguille radiale 8 sur laquelle un déchet 10 est piqué. Le peigne 11 comporte une fente 11a, orientée perpendiculairement à son bord avant 11b qui est parallèle à la génératrice du cylindre 2. Cette fente 11a est disposée sur la trajectoire circulaire décrite par l'aiguille radiale 8 autour de l'axe de rotation du cylindre de découpage 2, pour permettre le passage de l'aiguille radiale 8, de sorte que le bord avant 11b du peigne 11, peut s'approcher très près de la trajectoire 9 du sommet des filets de découpages 4-6, ce qui lui permet de s'engager entre cette trajectoire 9 et le déchet 8.Such a comb 11 is illustrated by FIG. a portion of the lower cutting cylinder 2 and a radial needle 8 on which a waste 10 is stung. The comb 11 has a slot 11a, oriented perpendicular to its front edge 11b which is parallel to the generator of the cylinder 2. This slot 11a is disposed on the circular path described by the radial needle 8 around the axis of rotation of the cutting cylinder 2, for allow the passage of the radial needle 8, so that the front edge 11b of the comb 11, can get very close to the trajectory 9 of the top of the nets of cuts 4-6, which allows him to engage between this trajectory 9 and the waste 8.

Ce peigne 11 est positionné et fixé sur un support 12 par des vis de fixation 13. Ce support 12 est lui-même fixé au bâti (non représenté) de la découpeuse par l'intermédiaire d'un rail ou traverse de guidage 14 en prise avec une aile d'appui 15 ménagée sur le support 12, ce qui permet de fixer ce dernier sur la traverse 14 par une vis 16. En déplaçant le support 12 le long de la traverse de guidage 14, on peut faire coïncider la fente 11a du peigne 11 avec la trajectoire circulaire de l'aiguille radiale 8. This comb 11 is positioned and fixed on a support 12 by screws of 13. This support 12 is itself fixed to the frame (not shown) of the cutting machine via a guide rail or cross member 14 in engagement with a support wing 15 formed on the support 12, which allows to fix this last on the crossbar 14 by a screw 16. By moving the support 12 along the guiding cross-member 14, the slot 11a of the comb 11 can be made to coincide with the circular path of the radial needle 8.

Le support 12 comporte deux parties, l'une 12a solidaire de l'aile d'appui 15, l'autre 12b solidaire du peigne 11. Ces deux parties sont reliées l'une à l'autre par deux lames de flexion parallèles 12c. Les plans respectifs de ces lames de flexion 12c sont sensiblement tangents à deux cercles concentriques au cylindre de découpage 2, de sorte que la partie 12b peut se déplacer dans la limite de la déformation élastique des lames 12c, dans le sens de la double flèche F2. Par conséquent, les lames parallèles 12c constituent en quelque sorte un parallélogramme déformable leur permettant premièrement d'avoir un rôle de guidage, définissant un déplacement du peigne 11 selon une trajectoire perpendiculaire au bord 11b de ce peigne 11, qui coupe le cylindre de sorte que la distance entre le bord 11b du peigne 11 et le cylindre 2 peut être modifiée. Ensuite ces lames 12c jouent un rôle d'organe de rappel dans la limite de leur déformation élastique, dont le rôle apparaítra par la suite.The support 12 comprises two parts, one 12a secured to the support wing 15, the other 12b secured to the comb 11. These two parts are connected to one another by two parallel bending blades 12c. The respective planes of these bending blades 12c are substantially tangent to two circles concentric with the cutting cylinder 2, so that the portion 12b can move within the limit of the elastic deformation of the blades 12c, in the direction of the double arrow F 2 . Therefore, the parallel blades 12c are in a way a deformable parallelogram allowing them firstly to have a guiding role, defining a movement of the comb 11 along a path perpendicular to the edge 11b of this comb 11, which cuts the cylinder so that the distance between the edge 11b of the comb 11 and the cylinder 2 can be modified. Then these blades 12c play a role of return member in the limit of their elastic deformation, whose role will appear thereafter.

La partie 12b du support 12 présente un filetage 17 dont l'axe est perpendiculaire aux plans des lames de flexion 12c. Une douille 18, taraudée et filetée, se terminant par une collerette 18a à une extrémité, est introduite dans une ouverture de la partie fixe 12a du support 12, ménagée coaxialement au filetage 17. Cette douille 18 est retenue par sa collerette 18a et fait saillie dans un espace 19 ménagé entre la partie fixe 12a et la partie mobile 12b du support 12. Un écrou 20 est engagé sur la partie filetée de cette douille 18 afin de la fixer à la partie fixe 12a.The part 12b of the support 12 has a thread 17 whose axis is perpendicular to the planes of flexion blades 12c. A socket 18, threaded and threaded end, ending in a collar 18a at one end, is introduced into an opening of the fixed part 12a of the support 12, arranged coaxially with the 17. This sleeve 18 is retained by its flange 18a and projects into a space 19 formed between the fixed part 12a and the mobile part 12b of the support 12. A nut 20 is engaged on the threaded part of this sleeve 18 in order to fix to the fixed part 12a.

Le taraudage intérieur de la douille 18 et celui 17 de la partie mobile 12b ont des pas respectifs différents. Dans l'exemple décrit, le pas du taraudage 17 est plus grand que celui de la douille 18. Une vis de réglage 21 présente deux tronçons filetés successifs, un tronçon d'extrémité 21a, engagé dans le taraudage 17 de la partie mobile 12b et un tronçon 21b engagé dans le taraudage de la douille 18. Etant donné que le pas du taraudage 17 est plus grand que celui de la douille 18, lorsque l'on visse la vis de réglage 21, elle tire la partie mobile 12b contre la partie fixe 12a du support 12 en faisant fléchir les lames 12c, écartant ainsi le bord 11b du peigne 11 de la trajectoire 9 des arêtes des filets de découpages 4-6.The internal thread of the socket 18 and the 17 of the part mobile 12b have different respective steps. In the example described, the step of tapping 17 is larger than that of the sleeve 18. A set screw 21 has two successive threaded sections, an end section 21a, engaged in the tapping 17 of the movable part 12b and a section 21b engaged in the tapping of the bushing 18. Since the pitch of the tapping 17 is no longer large than that of the sleeve 18, when screwing the adjusting screw 21, it pulls the movable part 12b against the fixed part 12a of the support 12 by bending the 12c blades, thus removing the edge 11b of the comb 11 of the trajectory 9 of the edges of cutting nets 4-6.

En faisant en sorte de faire travailler les lames de flexion 12c toujours d'un même côté de leur position neutre, le problème du rattrapage de jeu entre les filets des filetages et ceux des taraudages ne se pose pas, puisque les lames exercent constamment sur eux une précontrainte allant toujours dans la même direction. By making sure to work the bending blades 12c always on the same side of their neutral position, the problem of catching up with clearance between the threads of the threads and those of the threads does not arise, since the blades constantly exert on them a prestressing going always in the same direction.

La force exercée par les chocs produits lors de la rencontre entre un peigne 11 et un déchet 10, n'a pas d'influence sur le système de réglage. En effet, l'essentiel de cette force se produit dans une direction sensiblement parallèle aux lames 12c et n'a pas d'influence notable, susceptible de produire des micromouvements par rattrapage du jeu entre filetages et taraudages du système de réglage 17, 18, 21.The force exerted by the shocks produced during the meeting between a comb 11 and a waste 10, has no influence on the adjustment system. In Indeed, most of this force occurs in a direction substantially parallel to the blades 12c and has no significant influence, likely to produce micromovements by catching up the clearance between threads and internal threads of the adjusting system 17, 18, 21.

A titre d'exemple, la différence de pas entre les filetages 21a, 21b de la vis de réglage 21 produit un déplacement de 0,25 mm entre la partie mobile 12b et la partie fixe 12a, par tour de la vis de réglage 21, ce qui correspond à 0,7 µm pour une rotation de 1°. Il est facile de dimensionner les lames 12c pour obtenir une course de réglage de l'ordre de 0,5 mm sans déformation plastique. Dans une forme d'exécution du dispositif de réglage objet de l'invention, les lames 12c ont une épaisseur de 5 mm, une longueur de 28 mm et une largeur de 42 mm, correspondant à la largeur du support 12. Il est intéressant de noter que la longueur des lames parallèles 12c est sensiblement égale à leur largeur, ce qui leur confère une excellente résistance à la torsion.By way of example, the difference in pitch between the threads 21a, 21b of the adjusting screw 21 produces a displacement of 0.25 mm between the part mobile 12b and the fixed part 12a, by turn of the adjusting screw 21, which corresponds to 0.7 μm for a rotation of 1 °. It's easy to size blades 12c to obtain an adjustment stroke of the order of 0.5 mm without plastic deformation. In one embodiment of the adjustment device object of the invention, the blades 12c have a thickness of 5 mm, a length of 28 mm and a width of 42 mm, corresponding to the width of the support 12. It is interesting to note that the length of parallel blades 12c is substantially equal to their width, which gives them excellent resistance to the twist.

Bien entendu plusieurs supports 12 peuvent être positionnés le long de la traverse 14 en fonction des positions respectives et du nombre de déchets à enlever à chaque révolution du cylindre de découpage 2, chacun de ces supports 12 portant un peigne 11 dont la fente 11a coïncide avec une trajectoire circulaire d'une aiguille radiale 8.Of course, several supports 12 can be positioned on the along the crossing 14 according to the respective positions and the number of waste to be removed at each revolution of the cutting cylinder 2, each of these supports 12 carrying a comb 11 whose slot 11a coincides with a circular trajectory of a radial needle 8.

Une tôle 22 s'étendant sur toute la longueur des cylindres de découpage 1, 2 recouvre l'ensemble des supports 12. Elle se situe dans le prolongement de la face supérieure du peigne 11. Elle permet de protéger les systèmes de réglage tout en facilitant l'écoulement des déchets 10, évitant qu'ils ne s'accrochent par exemple à la fente 19.A sheet 22 extending over the entire length of the cylinders of cutting 1, 2 covers all the supports 12. It is located in the extension of the upper face of the comb 11. It makes it possible to protect the adjusting systems while facilitating the flow of waste 10, avoiding they do not cling for example to the slot 19.

Le réglage de la position du peigne 11 dans ses deux axes de déplacement est obtenu à l'aide de deux vis 16, 21 qui sont accessibles sur une même face du support 12 orientée parallèlement au cylindre 2 et donc aisément accessible. Une même clef permet d'effectuer ces réglages, de même que l'enlèvement du support 12 ou encore le remplacement du peigne 11.The adjustment of the position of the comb 11 in its two axes of displacement is obtained by means of two screws 16, 21 which are accessible on a same face of the support 12 oriented parallel to the cylinder 2 and therefore easily accessible. The same key allows you to make these adjustments, as well as that the removal of the support 12 or the replacement of the comb 11.

Claims (8)

  1. Device for adjusting the position between a waste ejector (11) and a cutting cylinder (2) for material in strip form (7) in a rotary diecutter, said cylinder (2) comprising at least one radial pin (8) for retaining waste (10) and projecting radially from its surface, said ejector (11) having a rectilinear part (11b) parallel to the generatrix of the said cylinder (2) and traversed by at least one slot (11a) coinciding with the trajectory of said radial pin (8) for the passage thereof, characterized in that it comprises a support (12) having a first part (12a) secured to the frame of the rotary diecutter, a second part (12b) secured to said ejector (11) and connected to the first part (12a) by guide means (12c) defining a transverse trajectory relative to the edge (11b) of said ejector (11) and intersecting said cylinder (2), adjustment means (17, 18, 21) for moving the said second part (12b) along the said transverse trajectory and elastic means (12c) for exerting a prestressing of the said second part (12b) on the said adjustment means (17, 18, 21).
  2. Device according to claim 1, characterized in that the said guide means and the said elastic means are in the form of two parallel elastic blades (12c) interconnecting the two parts (12a, 12b) of the said support (12).
  3. Device according to any one of the preceding claims, characterized in that the said adjustment means (17, 18, 21) comprise a screw (21) the shank of which has two threadings of different pitch (21a, 21b), respectively engaging in two internal tappings (18, 17) of axes parallel to said trajectory (F2) respectively secured to said first (12a) and second (12b) parts.
  4. Device according to any one of the preceding claims, characterized in that the tapping secured to the said first part is formed in a bushing (18) one end of which has a support collar (18a) while said bushing (18) projects from said first part (12) into a space (19) separating the said first part (12a) and second part (12b) and is threaded to allow said bushing (18) to be locked by means of a nut (20).
  5. Device according to any one of the preceding claims, characterized in that the pressure of said prestressing is exerted in a direction forming an angle close to 90° with the force transmitted to said second part (12b) resulting from the impacts of waste (10) on said ejector (11).
  6. Device according to any one of the preceding claims, characterized in that the first part (12a) of the said support (12) is connected to the said frame of the rotary diecutter by a support flange (15) engaging a crossbar (14) parallel to the axis of rotation of said cylinder (2), locking means (16) serving to fix the support (12) along said crossbar (14).
  7. Device according to claim 6, characterized in that the said adjustment means (21) and the said locking means (16) are accessible on the outer surfaces of the said support (12) situated in planes parallel to the axis of rotation of said cylinder (2).
  8. Device according to any one of claims 6 and 7, characterized in that a plurality of supports (12) are in engagement with said crossbar (14), each of them being associated with an ejector (11).
EP00108418A 1999-06-01 2000-04-18 Apparatus for adjusting the position of a cut-outs ejector and a cutting cylinder Expired - Lifetime EP1057596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH102699 1999-06-01
CH01026/99A CH693169A5 (en) 1999-06-01 1999-06-01 Apparatus for adjusting the position between a waste ejector and a cutting cylinder.

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EP1057596A2 EP1057596A2 (en) 2000-12-06
EP1057596A3 EP1057596A3 (en) 2004-08-04
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EP (1) EP1057596B1 (en)
JP (1) JP3357339B2 (en)
KR (1) KR100374675B1 (en)
CN (1) CN1174839C (en)
AT (1) ATE306372T1 (en)
AU (1) AU764343B2 (en)
BR (1) BR0002171A (en)
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DE (1) DE60023067T2 (en)
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US6949059B2 (en) * 2002-09-18 2005-09-27 Winkler + Dunnebier, Ag Two cylinder one piece pin stripping device
US20050274247A1 (en) * 2004-06-14 2005-12-15 Sean Talkington Stripper apparatus and methods for rotary dies
DE102008033775B4 (en) * 2008-07-18 2011-04-07 Bhs Corrugated Maschinen- Und Anlagenbau Gmbh Corrugated board plant with a lock device and method for discharging pieces of a corrugated web
US10245743B2 (en) 2009-05-13 2019-04-02 Bobst Sa Waste stripping unit with simplified tool adjustment in a packaging production machine
ES2587203T3 (en) 2009-05-13 2016-10-21 Bobst Mex Sa Waste ejection unit with tool change provided for a packaging production machine
ES2630370T3 (en) * 2013-03-08 2017-08-21 Bobst Mex Sa Device for trimming and ejection of waste, unit, and machine so equipped
CN103331479A (en) * 2013-07-01 2013-10-02 无锡市威特机械有限公司 Auxiliary knockout device for shearing mechanism of extruding machine
CN104842000A (en) * 2014-09-17 2015-08-19 无锡市威特机械有限公司 Auxiliary ramming device of shearing mechanism of extruding machine
CN104908099A (en) * 2015-07-09 2015-09-16 安庆市津海工业产品设计有限公司 Moisture-proof monitoring device for paper cutter
CN105538393B (en) * 2016-02-26 2017-08-01 湖州佳宁印刷有限公司 Paper cutter with reclaimed waste paper function
CA3016244C (en) * 2016-03-09 2020-05-12 Bobst Mex Sa Organe ejecteur et machine de traitement d'elements en forme de feuilles
CN105904506B (en) * 2016-05-24 2017-11-24 浙江国新中药饮片有限公司 A kind of installation protector of the vertical frequency modulation slicer of air pressure
CN106113132B (en) * 2016-07-01 2018-10-19 泰州长力树脂管有限公司 Cut the cutting method of different size sebific ducts
CN106695983A (en) * 2016-12-30 2017-05-24 重庆皖渝纸制品有限公司 Cardboard residue separation device
CN106863434B (en) * 2017-02-23 2018-10-16 京东方科技集团股份有限公司 Remove device and its operating method, cutter device
CN107053309B (en) * 2017-03-31 2018-08-24 台州市黄岩圣展工艺品有限公司 A kind of starter for plate cutting
CN110774337B (en) * 2019-11-18 2020-12-11 嘉兴市创美电器有限公司 Old and useless corrugated paper recovery unit
CN118514386B (en) * 2024-07-19 2024-09-27 晋江市现代彩色印刷有限公司 Environment-friendly printing machine for carton production

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ES2250045T3 (en) 2006-04-16
CA2308673C (en) 2004-05-18
CH693169A5 (en) 2003-03-27
KR100374675B1 (en) 2003-03-04
EP1057596A2 (en) 2000-12-06
CN1275472A (en) 2000-12-06
AU764343B2 (en) 2003-08-14
CA2308673A1 (en) 2000-12-01
DE60023067T2 (en) 2006-07-13
DE60023067D1 (en) 2005-11-17
TW450843B (en) 2001-08-21
BR0002171A (en) 2001-01-02
JP3357339B2 (en) 2002-12-16
CN1174839C (en) 2004-11-10
EP1057596A3 (en) 2004-08-04
ATE306372T1 (en) 2005-10-15
KR20010066786A (en) 2001-07-11
US6397714B1 (en) 2002-06-04
AU3779000A (en) 2000-12-07
JP2000343484A (en) 2000-12-12

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