EP1040894B1 - Dispositif de coupe pour rembobineuse - Google Patents

Dispositif de coupe pour rembobineuse Download PDF

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Publication number
EP1040894B1
EP1040894B1 EP20000102853 EP00102853A EP1040894B1 EP 1040894 B1 EP1040894 B1 EP 1040894B1 EP 20000102853 EP20000102853 EP 20000102853 EP 00102853 A EP00102853 A EP 00102853A EP 1040894 B1 EP1040894 B1 EP 1040894B1
Authority
EP
European Patent Office
Prior art keywords
cutting
web
roller
blade
cusp
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
EP20000102853
Other languages
German (de)
English (en)
Other versions
EP1040894A2 (fr
EP1040894A3 (fr
Inventor
Renato Matteucci
Mauro Biagioni
Giuseppe Lupi
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.)
Paper Converting Machine Co Italia SpA
Original Assignee
Paper Converting Machine Co Italia SpA
Paper Converting Machine Co
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 Paper Converting Machine Co Italia SpA, Paper Converting Machine Co filed Critical Paper Converting Machine Co Italia SpA
Publication of EP1040894A2 publication Critical patent/EP1040894A2/fr
Publication of EP1040894A3 publication Critical patent/EP1040894A3/fr
Application granted granted Critical
Publication of EP1040894B1 publication Critical patent/EP1040894B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • 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
    • B26D1/38—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 fixed blade or other fixed member
    • B26D1/385—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 fixed blade or other fixed member for thin material, e.g. for sheets, strips or the like

Definitions

  • the present invention refers in general to a rewinding machine for logs of sheet material and in particular to a cutting device and a relative method for transversally cutting the web of sheet material at the end of the rewinding stage.
  • a rewinding machine is used to unwind large-sized rolls of sheet material, and to wind such sheet material into smaller rolls, suitable to be put onto the market. Once a roll is completed, reaching the desired diameter, the sheet material is cut transversally, the tail end of the web is glued onto the formed roll and the roll is ejected from the winding assembly of the machine, where winding of a new roll commences.
  • the cutting operation is normally carried out by passing the web between two rollers, one carrying a blade and the other having a cavity acting as a counter-blade.
  • the blade can be mounted fixedly on the corresponding roller, or moveably so as to be able to withdraw thereinto.
  • the entire roller is moved with the blade
  • the blade is extracted from the surface of the roller.
  • the sheet material is pushed by the blade into the cavity of the other roller and is torn by passing the elasticity limit of the material.
  • Such a cutting system has drawbacks. In fact is unsuitable for materials that have a high coefficient of elasticity, such as polyethylene, for example, which would dilate excessively, without reaching tearing point.
  • the cutting system by tearing according to the prior art does not ensure a perfect cutting line, indeed the cut profile often has tears and imperfections.
  • WO 96-20072 describes a cutting apparatus comprising two rotating rollers between which a web of paper sheet to be cut is fed.
  • DE-A-557.353 describes a device for producing cuttings in a paper or board web which is fed along a horizontal rectilinear path, comprising an upper blade fixed to a rotating shaft cooperating with a lower fixed blade.
  • US-A-3.277.630 discloses a device for cutting desired lengths from a web of wrapper material, comprising a knife mounted inside a rotating drum and rotated in timed relationship with it, so that the knife projects through openings provided in the cylindrical shell of the drum to cooperate with a fixed knife.
  • the object of the invention is to eliminate said drawbacks, providing a cutting device for a rewinding machine also suitable for materials having a high coefficient of elasticity and that allows an extremely precise cutting profile to be obtained.
  • Another object of the present invention is to provide such a cutting system that is extremely safe, occupies little space and is easy to make.
  • the cutting device for a rewinding machine provides a cutting roller on which the web is wound.
  • a mobile blade substantially parallel to the axis of the roller, is mounted integrally on the cutting roller. Said mobile blade is extracted from the roller through special operating means, in order to bring the web into contact with cutting blades mounted fixedly on the frame of the machine.
  • These cutting blades are assembled with a particular configuration. They follow the cutting roller helically and have a cusp-shaped profile. In this manner the first cut of the web is performed by the central cutting blades (corresponding to the apex of the cusp) and then, through the pulling action of the winding assembly, shearing of the web continues until the ends are reached. In this manner extremely precise cutting is achieved, irrespective of the elastic strength of the material, since the web is not severed by tearing but is sliced by means of contact between blades.
  • a cam mechanism is provided in the cutting roller to ensure that the mobile blade retracts, in the utmost safety, once the cut has been made. In this manner it is independent from the operating mechanism of the mobile blade, and it avoids the possibility of the blade remaining extracted, when not necessary, thus damaging the other parts of the machine.
  • a pneumatic system is provided such as to form a vacuum in a certain area of the roller surface, so that the web adheres perfectly to said surface, avoiding possible slipping during cutting, which would cause imperfections along the cut edges.
  • the pneumatic system removes the vacuum, allowing detachment from the roller of the end of the web that will begin winding on the new roll.
  • the cutting device As shown in Figure 2, the cutting device, indicated as a whole with reference numeral 1, comprises a cutting roller 2 on which is wound a web 10 of sheet material (shown hatched) coming from an unwinding assembly and fed to a winding assembly, which can comprise said cutting roller 2.
  • the cutting roller 2 comprises a fixed central shaft 3 on which is rotatably mounted a skirt 4 set in rotation around the axis X of the roller.
  • Hinged on the skirt 4 at point 7 is a pneumatic or hydraulic actuator 5 comprising a cylinder 6 inside which slides a piston whose rod 8 acts on the end of an arm 12, hinged in point 13 to the skirt 4 of the roller 2.
  • a blade 15 is provided at the other end of the arm 12, extending parallel to the axis X of the roller 2 for its whole length. The blade 15 is locked to the arm 12 by means of a clamp 14.
  • a cam follower 9 is provided that follows the profile of a cam 11 fixedly mounted on the shaft 3 of the roller 2.
  • a bar 20 with a rectangular section, of substantially the same length as the roller 2 and extending substantially parallel to the axis X of the roller 2 is secured to the frame of the rewinding machine.
  • a support 21 is secured to the bar 20, protruding toward the roller 2 and supporting a plurality of attachments or clamps 22 (in Fig. 2 only two are shown).
  • a cutting blade 23 is fixed to each clamp 22.
  • the clamps 22 and the cutting blades 23 follow a cusp-shaped path 24 that runs helically or spirally on the roller 2.
  • the blades 23' supported by the central clamps indicated by 22' are the first blades to encounter the web 10 and cut it against the blade 15.
  • the web 10 advances supported by the blade 15, it gradually comes into contact with the other blades 23 disposed symmetrically along the cusp-shaped path 24.
  • the web 10 is gradually cut in a scissor-like fashion, allowing an extremely clean, precise cut, determined by the contact between the two blades, 15 and 23.
  • the cut that is determined will be perfectly straight, lying parallel to the axis X of the roller 2.
  • the cam follower 9 and the cam 11 ensure that during rotation of the skirt 4 of the roller, the supporting blade 15 is always in the retracted position when it is not in the area of the cutting blades 23.
  • the cutting device 1 always works in conditions of the utmost safety. In fact, irrespective of the response times of the actuator 5, after having made the cut, there is the certainty that the blade 15 will return inside the surface of the skirt 4, avoiding any possible damage to the machine members.
  • a suction means 30 disposed longitudinally to the roller 2 is also provided on the skirt 4 of the roller 2, downstream of the blade 15.
  • Said suction means comprise a plurality of holes 31 connected to the pneumatic system of the machine.
  • the holes 31 are able to carry out air suction, so as to create a vacuum between the web 10 and the surface of the skirt 4.
  • the vacuum is removed and the tail end of the web 10 is detached from the skirt 4 and can be glued, for example, onto a new core to begin winding of a new roll.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Replacement Of Web Rolls (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Claims (8)

  1. Dispositif de coupe pour machine à rembobiner comprenant un corps de déroulement en mesure de dérouler un rouleau de matériau en feuille ou en bande (10) à large diamètre, et un groupe d'enroulement en mesure de rembobiner la bande (10) en rouleaux à petit diamètre, ledit dispositif de coupe (1) effectuant la coupe de la bande à la fin de l'enroulement de chacun des rouleaux et comprenant un rouleau de coupe (2) monté de façon rotative autour de son propre axe (X) sur lequel la bande (10) est enroulée, ledit rouleau de coupe comprenant des premiers dispositifs de coupe se composant d'une lame mobile (15), montée de façon à faire partie intégrante sur celui-ci, en mesure de mettre ladite bande (10) en contact avec des deuxièmes dispositifs de coupe (23) montés de façon fixe sur la structure de la machine, caractérisé en ce que ladite lame mobile (15) s'étend dans le sens longitudinal substantiellement sur toute la longueur du rouleau (2) parallèle à son axe (X) et est montée sur un bras (12) basculant autour d'un pivot (13), actionné par un actionneur (5), de sorte qu'il peut être déplacé d'une position rétractée à l'intérieur du rouleau (2) à une position de sortie en saillie par rapport au profil dudit rouleau (2).
  2. Dispositif de coupe selon la revendication 1, caractérisé en ce que lesdits deuxièmes dispositifs de coupe (23) ont une forme à cuspide (24), de sorte que pendant la coupe la bande (10) supportée par la lame (15) entre en contact initialement avec la pointe centrale de la cuspide et ensuite graduellement avec les points symétriques des deux côtés de la cuspide.
  3. Dispositif de coupe selon la revendication 1 ou 2, caractérisé en ce que ledit bras (12) et ledit actionneur (5) font partie intégrante d'une jupe (4) du rouleau (2) montée de façon rotative autour d'un arbre fixe central (3).
  4. Dispositif de coupe selon une revendication quelconque parmi les revendications susmentionnées, caractérisé en ce qu'un système à cames (9, 11) en mesure de garantir le retour en toute sécurité desdits premiers dispositifs de coupe (15), une fois la coupe effectuée, est prévu à l'intérieur dudit rouleau (2).
  5. Dispositif de coupe selon une revendication quelconque parmi les revendications susmentionnées, caractérisé en ce que lesdits deuxièmes dispositifs de coupe comprennent une pluralité de lames de coupe placées l'une à côté de l'autre.
  6. Dispositif de coupe selon une revendication quelconque parmi les revendications susmentionnées, caractérisé en ce que des dispositifs (30) sont prévus sur ledit rouleau (2) pour créer un vide, afin de garantir la retenue de la bande (10) en aval de la zone de coupe, pour empêcher la bande de glisser pendant la coupe.
  7. Méthode de coupe transversale d'une bande (10) dans une machine à rembobiner, dans laquelle la bande est déroulée d'une bobine à large diamètre, passée autour d'un rouleau de coupe (2) et rembobinée en rouleaux à petit diamètre, où à la fin de l'enroulement de chaque rouleau, une réserve est faite pour qu'une lame de coupe mobile (15) pousse la bande (10) contre une lame fixe (23) provoquant ainsi la coupe transversale de celui-ci, caractérisée en ce que ladite lame mobile (15) est montée sur un bras (12) qui est poussé à la rotation autour d'un pivot (13), actionné par un actionneur (5), de sorte qu'il peut être déplacé d'une position à l'intérieur du rouleau (2) à une position de sortie en saillie par rapport au profil dudit rouleau (2).
  8. Méthode selon la revendication 7, où ladite lame fixe (23) a une forme à cuspide pour provoquer une coupe transversale droite et nette de la bande, en partant de la pointe centrale de la cuspide et en continuant graduellement et symétriquement vers l'extrémité des deux côtés de la cuspide.
EP20000102853 1999-03-29 2000-02-11 Dispositif de coupe pour rembobineuse Expired - Lifetime EP1040894B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI990642 IT1312033B1 (it) 1999-03-29 1999-03-29 Dispositivo di taglio per macchina ribobinatrice.
ITMI990642 1999-03-29

Publications (3)

Publication Number Publication Date
EP1040894A2 EP1040894A2 (fr) 2000-10-04
EP1040894A3 EP1040894A3 (fr) 2003-06-11
EP1040894B1 true EP1040894B1 (fr) 2005-08-17

Family

ID=11382490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000102853 Expired - Lifetime EP1040894B1 (fr) 1999-03-29 2000-02-11 Dispositif de coupe pour rembobineuse

Country Status (4)

Country Link
EP (1) EP1040894B1 (fr)
DE (1) DE60021941T2 (fr)
ES (1) ES2247965T3 (fr)
IT (1) IT1312033B1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074392B (de) * 1960-01-28 F L Smithe Machine Co In^ New York N Y (V St A) I Querschneider fur Papier od dgl Bahnen
DE557353C (de) * 1932-08-22 Maschb Honsel & Co Vorrichtung zur Herstellung von Ausschnitten in einer laufenden Papier- oder Kartonbahn
GB663579A (en) * 1949-04-02 1951-12-27 James Eckersley Battersby Improvements in and relating to apparatus for cutting sheets from webs of cardboard, paper, and the like
GB735381A (en) * 1953-04-14 1955-08-17 Forsters Machine Company Ltd Machines for cutting off lengths of thin material
GB1037261A (en) * 1962-03-08 1966-07-27 Derek Henry Youngman Improvements in or relating to the cutting of desired lengths from a web of wrapper material
FI101352B (fi) * 1994-12-28 1998-06-15 Gma Printing Syst Ab Oy Paperiarkkiradan poikittaisleikkuulaite
CA2247374A1 (fr) * 1996-03-07 1997-09-12 Lawrence Paper Company Appareil d'entaillage rotatif a lame d'entaillage retractable

Also Published As

Publication number Publication date
DE60021941D1 (de) 2005-09-22
EP1040894A2 (fr) 2000-10-04
ES2247965T3 (es) 2006-03-16
IT1312033B1 (it) 2002-04-04
ITMI990642A1 (it) 2000-09-29
DE60021941T2 (de) 2006-06-14
EP1040894A3 (fr) 2003-06-11

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