EP3311965B1 - Machine de coupe pour découper des rouleaux de matériau en bande et procédé de découpé associé - Google Patents

Machine de coupe pour découper des rouleaux de matériau en bande et procédé de découpé associé Download PDF

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Publication number
EP3311965B1
EP3311965B1 EP17195028.0A EP17195028A EP3311965B1 EP 3311965 B1 EP3311965 B1 EP 3311965B1 EP 17195028 A EP17195028 A EP 17195028A EP 3311965 B1 EP3311965 B1 EP 3311965B1
Authority
EP
European Patent Office
Prior art keywords
cutting
blade
logs
machine
disc
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.)
Active
Application number
EP17195028.0A
Other languages
German (de)
English (en)
Other versions
EP3311965A1 (fr
Inventor
Giovanni Bertoli Barsotti
Luca TAGLIASACCHI
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
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Publication date
Application filed by Paper Converting Machine Co Italia SpA filed Critical Paper Converting Machine Co Italia SpA
Publication of EP3311965A1 publication Critical patent/EP3311965A1/fr
Application granted granted Critical
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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
    • 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
    • B26D1/14—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 circular cutting member, e.g. disc cutter
    • B26D1/157—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 circular cutting member, e.g. disc cutter rotating about a movable axis
    • B26D1/16—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 circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • 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
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls

Definitions

  • the present invention relates in general to the production of rolls of sheet material and more particularly to a cutting-off machine and a method for the cutting of logs or sticks of sheet material, in particular paper.
  • Cutting of the logs for forming rolls of smaller length is carried out with special cutting-off machines which have one or more metal or ceramic blades, of the disc type, which are made to rotate in an orbit around an axis in a cutting plane transverse to the direction of feeding of the log, or of the belt type, which are cyclically lowered onto the log to be cut.
  • the logs are made to move forwards, normally in several parallel channels, towards the cutting blade, pushed by special pushers of a drive chain transferred on transfer wheels.
  • Another type of cutting-off machine provides for a series of fixed flat blades against which the logs are driven in a direction perpendicular to their axes, so as to be "sliced".
  • the cutting blade in the case of belt disc blades for performing the cutting of the log has to have a high rotation speed, during cutting, between the surface of the blade and that of the log to be cut, a high friction is generated which causes excessive overheating of the blade. Having reached a limit temperature, variable in accordance with the material and the shape of the disc of the blade, a relaxation and thermal expansion of the material of the disc occur which lead to deformation of the same disc.
  • This deformation is due to the residual tensions induced in the disc of the blade in the phase of manufacture to make its surface take on the required planarity.
  • Cutting-off machines are therefore equipped with systems aiming to lower the temperature of the blade or to control deformation thereof, as occurs in the patent EP 1609570 B1 of the same Applicant, or to ascertain the quality of the cut.
  • US 3 468 203 forming the base of the preambles of claims 1 and 6, describes an apparatus for cutting a strip of flexible material by means of a knife which is pushed elastically against the belt while the latter advances continuously in order to be wound on a spindle.
  • means are provided to vibrate the knife in the range of sonic or ultrasonic frequencies.
  • the object of the invention is in fact that of providing such a cutting-off machine which eliminates, or at least reduces, the disadvantages of the cutting-off machines of the prior art.
  • an object of the invention is that of providing a cutting-off machine which allows cuts to be made of high quality, avoiding overheating and deformation of the cutting blade.
  • Another object of the invention is that of providing such a cutting-off machine wherein the cutting blade does not require frequent sharpening.
  • Yet another object of the invention is that of providing a cutting-off machine of any one of the known types, which requires minimum modifications to achieve the abovementioned results.
  • Substantially the cutting-off machine for the cutting of logs of sheet material comprises at least one cutting blade placed on a plane perpendicular to the axis of the logs, in order to perform transverse cuts over the same and produce rolls of smaller length with respect to the logs, said at least one cutting blade being associated with an ultrasonic device apt to generate a vibrating force on the blade.
  • the cutting-off machine 10 is of the standard type, with rotating disc blade 11, mounted on an orbiting arm 12 so that the blade performs an orbit in a cutting plane perpendicular to the axis of the logs, denoted by reference numeral 13.
  • the logs 13 are made to move forwards in the direction of their axes in order to be taken under the cutting blade 11. Obviously, several cutting blades can be provided.
  • the drawings also show schematically a sharpening assembly 14 apt to sharpen periodically, and on indication of special sensors, the blade 11 as the latter wears out, if manufactured for example in metal.
  • the wear of the blade is considerably reduced.
  • the sharpening assembly 14 can be absent.
  • the cutting-off machine 10 is equipped with an ultrasonic device for causing the blade 11 to vibrate and improve the cut, eliminating the disadvantages illustrated previously.
  • the ultrasonic device in the schematic form shown, comprises a generator of ultrasounds 20, connected by means of a cable 21, to an ultrasonic converter 22, coupled to a sonotrode 23.
  • the ultrasonic converter 22 converts the electrical energy with frequency coming from the generator 20 into mechanical vibrations with high frequency, which are transferred to the sonotrode 23, which transmits the vibratory energy to the blade 11.
  • the sonotrode 23 is mounted on the axis X of the blade 11, so that the ultrasounds are applied at the centre of the blade.
  • FIGS 3 and 4 in which the same reference numerals introduced previously are used, illustrate an embodiment of the cutting-off machine wholly similar to that of Figures 1 and 2 .
  • the cutting-off machine comprises two rectilinear flat blades 11 placed in diametrically opposed positions on a rotating support 12.
  • the sonotrodes 23 are placed at the base of the blades 11.
  • a plurality of fixed flat blades 11 are provided, against which the logs 13 are made to move forwards in a direction perpendicular to their axes, for a so-called "passing" cut.
  • a plurality of lower drive belts 30 are provided, and a corresponding plurality of opposite upper drive belts 31, placed between the plurality of blades 11.
  • a plurality of ultrasounds generators 20 are provided, connected by means of respective cables 21 to corresponding ultrasonic converters 22 and sonotrodes 23 placed at the bases of the respective blades 11.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Claims (8)

  1. Machine à tronçonner (10) pour couper des tronçons (13) de matériau en bande, comprenant au moins une lame de coupe (11) placée sur un plan perpendiculaire à l'axe des tronçons (13) afin de réaliser des coupes transversales sur ces mêmes et produire des rouleaux (15) de plus petite longueur que les tronçons, caractérisée en ce que ladite au moins une lame de coupe (11) est une lame rotative à laquelle est associée une sonotrode (23) d'un dispositif à ultrasons apte à générer une force de vibration sur la lame.
  2. Machine à tronçonner selon la revendication 1, dans laquelle ladite lame rotative (11) est un disque porté par un bras en révolution, et ladite sonotrode (23) est placée sur l'axe (X) de la lame en disque (11).
  3. Machine à tronçonner selon la revendication 1, dans laquelle ladite lame rotative (11) est un disque porté par un bras en révolution (12), et ladite sonotrode (23) est placée à proximité du bord de ladite lame en disque (13).
  4. Machine à tronçonner selon la revendication 1, dans laquelle ladite lame rotative (11) est constituée par des lames plates rectilignes (11) diamétralement opposées, portées par un support rotatif (12), et ladite sonotrode (23) est placée de manière correspondante à la base de la lame correspondante.
  5. Machine à tronçonner selon la revendication 1, caractérisée en ce que ledit dispositif à ultrasons comprend un générateur d'ultrasons (20) relié au moyen d'un câble (21) à un convertisseur d'ultrasons (22) et à ladite sonotrode (23) placée sur la lame (11).
  6. Procédé pour couper des tronçons (13) de matériau en bande au moyen d'une machine à tronçonner ayant au moins une lame de coupe (11) placée sur un plan perpendiculaire à l'axe des tronçons, consistant à amener ladite au moins une lame en contact avec lesdits tronçons, ou vice versa lesdits tronçons en contact avec ladite au moins une lame, pour effectuer des coupes transversales sur les tronçons et produire des rouleaux (15) de plus petite longueur que les tronçons, caractérisé en ce que ladite au moins une lame de coupe (11) est une lame rotative et que des ultrasons sont appliqués sur celle-ci pendant l'opération de coupe.
  7. Procédé selon la revendication 6, dans lequel ladite lame rotative (11) est un disque porté par un bras en révolution (12) et lesdits ultrasons sont appliqués sur l'axe (X) du disque ou à proximité de son bord.
  8. Procédé selon la revendication 6, dans lequel ladite au moins une lame de coupe rotative (11) est constituée par des lames plates rectilignes diamétralement opposées et lesdits ultrasons sont appliqués à la base de la lame respective.
EP17195028.0A 2016-10-18 2017-10-05 Machine de coupe pour découper des rouleaux de matériau en bande et procédé de découpé associé Active EP3311965B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000104428A IT201600104428A1 (it) 2016-10-18 2016-10-18 Macchina troncatrice per il taglio di log di materiale in foglio e relativo metodo di taglio

Publications (2)

Publication Number Publication Date
EP3311965A1 EP3311965A1 (fr) 2018-04-25
EP3311965B1 true EP3311965B1 (fr) 2019-05-01

Family

ID=57960749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17195028.0A Active EP3311965B1 (fr) 2016-10-18 2017-10-05 Machine de coupe pour découper des rouleaux de matériau en bande et procédé de découpé associé

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Country Link
EP (1) EP3311965B1 (fr)
IT (1) IT201600104428A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000016024A1 (it) * 2020-07-02 2022-01-02 Paper Converting Machine Company S P A Metodo di controllo del processo di affilatura di una lama di taglio in una macchina troncatrice
EP3944925B1 (fr) * 2020-07-29 2022-12-07 Paper Converting Machine Company S.p.A Système de contrôle de la qualité de produits dans une sortie de machine de coupe
DE102023109769B3 (de) 2023-04-18 2024-09-26 Contexo Gmbh Vorrichtung zum Einbringen eines Schlitzes in ein Werkstück

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1177064A (en) * 1966-04-15 1970-01-07 Chambon Ltd Improvements in or relating to Knives
EP1075910A1 (fr) * 1999-08-10 2001-02-14 Fort James France Machine de découpe d'un rouleau de papier
EP2803455A1 (fr) * 2013-05-13 2014-11-19 A O Schallinox GmbH Dispositif de coupe d'un produit de processus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
IT201600104428A1 (it) 2018-04-18
EP3311965A1 (fr) 2018-04-25

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