EP0970784B1 - Vorrichtung zum Schneiden von Bandmaterialrollen - Google Patents

Vorrichtung zum Schneiden von Bandmaterialrollen Download PDF

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Publication number
EP0970784B1
EP0970784B1 EP19990109915 EP99109915A EP0970784B1 EP 0970784 B1 EP0970784 B1 EP 0970784B1 EP 19990109915 EP19990109915 EP 19990109915 EP 99109915 A EP99109915 A EP 99109915A EP 0970784 B1 EP0970784 B1 EP 0970784B1
Authority
EP
European Patent Office
Prior art keywords
cutting
blade
fulcrum
cranks
axis
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
EP19990109915
Other languages
English (en)
French (fr)
Other versions
EP0970784A2 (de
EP0970784A3 (de
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 EP0970784A2 publication Critical patent/EP0970784A2/de
Publication of EP0970784A3 publication Critical patent/EP0970784A3/de
Application granted granted Critical
Publication of EP0970784B1 publication Critical patent/EP0970784B1/de
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
    • 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

Definitions

  • the present invention relates to a device for cutting rolls of web material, particularly suitable for cutting off machines intended for cutting logs of web material, such as paper, tissue paper, non-woven fabric, plastics, etc.
  • logs are initially produced which must subsequently be cut into rolls of the desired length.
  • special cutting-off machines having one or more rotating disc or endless blades that are cyclically lowered on the logs to be cut, which are made to advance in special channels.
  • the cutting cycles are very frequent, therefore after a very short time the cutting blade becomes worn through the effect of friction, decreasing in diameter and requiring periodic adjustments to its position.
  • trajectory followed by the axis of the cutting blade during the working phase is substantially shaped like a parallelogram.
  • Articulated mechanisms are also per se known in which cam or connecting rod-crank systems cause the cutting blade axis to follow a substantially circular trajectory.
  • the cutting blade drive systems according to the prior art have various drawbacks. They give the cutting assembly a high inert mass that complicates its movement.
  • the cutting blade remains rather a long time inside the log that is to be cut; this results in excessive heating of the blade, which makes more frequent sharpening necessary and causes rapid, marked wear.
  • US-3,540,338 describes a cutoff machine in which the cutoff saw blade is oscillated back and forth with reference to the work.
  • the known cutting blade drive systems are not very versatile. In fact, because of the trajectories followed by the blade, it is not possible to use a number of cutting channels in parallel, unless the blade assembly is radically replaced and in addition problems of adjustment arise every time there is a change in production to cutting of rolls with a different diameter.
  • the aim of the invention is to eliminate these drawbacks by providing a cutting device for rolls of web material that is practical, economical and easy to produce.
  • Another aim of the present invention is to provide such a cutting device for rolls of web material that is highly versatile.
  • the cutting device for rolls of web material has a drive system such as to allow the cutting blade to follow a more or less elliptical orbit.
  • Said drive system consists of a main arm supporting the cutting blade, said arm being hinged in an intermediate part to a first connecting rod and at the end opposite the blade to a second connecting rod connected to a mechanism for regulating wear on the blade.
  • the elliptical orbit followed by the blade makes it possible to obtain a cutting assembly with less inertia compared with the cutting assemblies of the prior art. Consequently the speed of movement of the cutting assembly is faster, enabling the production per time unit to be increased.
  • the elliptical trajectory of the blade is adjusted so that the blade enters the log to be cut following the smallest radiuses of curvature of its elliptical orbit, thus the blade stays inside the log for a shorter time than those of the prior art. Consequently less heating occurs, resulting in less need for frequent sharpening and thus less wear on the blade.
  • the geometrical arrangement of the elliptical orbit followed by the blade can be suitably modified to make it longer, thus obtaining the possibility of serving a plurality of log feeding channels arranged in parallel.
  • a cutting off machine comprises a supporting frame 1 on which a conveyor 2, usually of the chain type, is mounted.
  • the configuration in the appended figures has a single channel 3, shown with unbroken lines, for housing and feeding of the logs 4, which can be of different diameters, as shown in the figures.
  • the device according to the invention can be adapted to a plurality of cutting channels, and in Figure 1 two other channels 3 parallel to the first are shown with a dashed line.
  • the logs 4 advancing in the channel 3 are fed to a rotating-disc cutting blade 5, which cuts them to the desired length.
  • the blade 5 is set in rotation, around its own axis X by a motor through a transmission, for example a belt transmission (not shown in the drawings) to be considered per se known.
  • a transmission for example a belt transmission (not shown in the drawings) to be considered per se known.
  • the blade 5 is mounted at the end of an arm 6.
  • a crank 8 turning around an axis O on the frame 1 of the machine acts at an intermediate point Y of the blade-bearing arm 6.
  • the other end of the blade-bearing arm 6 is hinged on an axis Z, to a secondary arm 9, so that the fulcrum Z can slide, when necessary, along said secondary arm 9.
  • a second crank 10 turning around an axis O' acts, on an axis V, on the frame 1 of the cutting off machine.
  • a rod 11 is also hinged at the axis V.
  • Said drive means in phase with one another, respectively set the crank 8 in rotation around the axis O and the crank 10 around the axis O'.
  • Said drive means can preferably be brushless motors set in phase with on another through an encoder.
  • crank pin Y When the crank 8 is made to turn in the direction of the arrow F A the crank pin Y will travel along the circular trajectory 15. Likewise, when the crank 10 is turned in the same direction as the crank 8 (see arrow F B ), the crank pin V will travel along the circular trajectory 16 (Fig. 2), causing movement of the articulated triangle 14. As shown in Figure 2, movement of the articulated triangle 14 forces the fulcrum Z, integral with the end of the arm 6, to follow an elliptical trajectory 17; consequently the fulcrum X corresponding to the axis of the cutting blade follows an elliptical trajectory 18. The major axis of the elliptical trajectory 18 is substantially at right angle to the major axis of the elliptical trajectory 17. The disc cutting blade 5 therefore follows the envelope of trajectories 19 which proves to have a substantially elliptical outline.
  • Figure 3 shows a cutting device according to the invention in which the cutting blade, again indicated by reference numeral 5, has a smaller diameter than that in Figure 1, and likewise the log 4 is smaller in diameter than that in Figure 1.
  • the fulcrum Z can be seen to have been moved from the end of the secondary arm 9 toward the central part of said arm 9 in order to obtain an elliptical trajectory of the blade 5 that ensures cutting of the logs 4.
  • drive means In order to obtain translation of the fulcrum Z along the secondary arm 9 drive means are provided that can be interfaced to a microprocessor that can receive the data from the user or from sensing means able to continually monitor the diameter values of the cutting blades 5.
  • Figure 4 shows an embodiment of the cutting device for rolls of web material according to the invention, in which the direction of rotation F B ' of the crank 10 around its own fulcrum O' is inverted with respect to the direction of rotation F B of Figure 1.
  • the axis X of the cutting disk 5 follows a trajectory again indicated by 18 shaped like an irregular ellipse.
  • the envelope of the trajectories 19 that the blade 5 follows nevertheless continues to have a substantially elliptical outline and therefore in this case also the device according to the invention maintains all the above listed advantages.
  • cranks 8 and 10 By varying the length of the cranks 8 and 10 it is possible to modify the geometrical configuration of the orbit 18, moving it so that it becomes longer and can thus operate on a number of cutting channels, as shown by the dashed line in Figure 1.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Formation And Processing Of Food Products (AREA)

Claims (9)

  1. Eine Schneidevorrichtung zum Schneiden von Rollen von Gewebematerial von Stämmen (4), die in einem oder mehreren parallelen Kanälen (3) vorgeschoben werden und mindestens ein Schneidemesser (5) umfasst, das drehend um eine Drehachse (X) getrieben wird, dadurch gekennzeichnet, dass Elemente zum Antrieb des genannten Messers (4) vorgesehen sind, die einen Messerhaltearm (6) umfassen, der durch ein Kurbelpaar (8) und (10) in Bewegung gesetzt wird und in der Lage ist, der genannten Drehachse (X) eine im wesentlichen elliptische Bahn zu verleihen.
  2. Eine Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die genannten Kurbeln (8) und (10) phasengleich zueinander betrieben werden.
  3. Eine Vorrichtung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass die genannten Kurbeln (8) und (10) sich in derselben Richtung oder in entgegen gesetzten Richtungen drehen.
  4. Eine Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die genannten Kurbeln (8) und (10) jeweils an einem Zwischenpunkt (Y) des Messerhaltearms (6) und an einer Enddrehachse (Z) des genannten Arms (6) über ein Stangensystem (14) tätig sind.
  5. Eine Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass das genannte Stangensystem (14) ein Gelenkdreieck ist, das einen Nebenarm (9) umfasst, über den die genannte Drehachse (Z) des Messerhaltearms (6) gleiten kann und auf dem der Zapfen (V) der Kurbel (10) arbeitet, sowie zwei Stangen (10, 13), die miteinander durch eine Gelenkverbindung (12) und jeweils an den freien Enden mit den genannten Achsen (Z) und (V) drehbar über Scharniere verbunden sind.
  6. Eine Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass die genannten Drehachsen (Z) und (X) in einer vollständigen Drehung der genannten Kurbeln (8) und (10) im wesentlichen elliptische Bahnen zurücklegen, deren jeweilige größere Achsen im wesentlichen im rechten Winkel zueinander liegen.
  7. Eine Vorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass Elemente, die durch einen Mikroprozessor gesteuert werden, der an Elemente zum Ertasten der Durchmesseränderung der Messer (5, 5') angeschlossen ist, vorgesehen sind, um die genannte Drehachse (Z) zu veranlassen, am Nebenarm (9) entlang zu gleiten.
  8. Eine Vorrichtung gemäß einem beliebigen der Ansprüche von 1 bis 5, dadurch gekennzeichnet, dass die genannten Kurbeln (8) und (10) mit Hilfe eines Encoders durch bürstenlose Motoren angetrieben werden, die phasengleich zueinander sind.
  9. Eine Schneidemaschine zum Schneiden von Rollen von Gewebematerial von Stämmen (4), dadurch gekennzeichnet, dass sie eine Schneidevorrichtung gemäß einem beliebigen der vorausgegangenen Ansprüche umfasst.
EP19990109915 1998-07-09 1999-05-20 Vorrichtung zum Schneiden von Bandmaterialrollen Expired - Lifetime EP0970784B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT98MI001573A ITMI981573A1 (it) 1998-07-09 1998-07-09 Dispositivo di taglio di rotoli di materiale in foglio
ITMI981573 1998-07-09

Publications (3)

Publication Number Publication Date
EP0970784A2 EP0970784A2 (de) 2000-01-12
EP0970784A3 EP0970784A3 (de) 2002-06-05
EP0970784B1 true EP0970784B1 (de) 2004-03-17

Family

ID=11380405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990109915 Expired - Lifetime EP0970784B1 (de) 1998-07-09 1999-05-20 Vorrichtung zum Schneiden von Bandmaterialrollen

Country Status (4)

Country Link
EP (1) EP0970784B1 (de)
DE (1) DE69915545T2 (de)
ES (1) ES2218902T3 (de)
IT (1) ITMI981573A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105829042A (zh) 2014-02-06 2016-08-03 未来股份公司 用于切割纸卷材的方法和机器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1941519A (en) * 1929-04-05 1934-01-02 Us Slicing Machine Co Driving means for slicing machine knives
US3363656A (en) * 1964-09-25 1968-01-16 Roy D. Snyder Meat slicing machine
US3540338A (en) * 1968-11-21 1970-11-17 James Mcewan Inc Cutoff machine
FR2584970B1 (fr) * 1985-07-22 1989-08-18 Sireix Georges Dispositif de coupe pour machines de formage d'articles enroules
WO1996039287A1 (en) * 1993-12-21 1996-12-12 Dalumverken Ab Apparatus for cutting tubular material
DE69814853T2 (de) * 1998-08-21 2004-05-06 M T C - Macchine Trasformazione Carta S.R.L., Porcari Verfahren sowie Vorrichtung zum Bewegen des Kreismessers einer Maschine zum Schneiden von Papierrollen oder dergleichen

Also Published As

Publication number Publication date
DE69915545D1 (de) 2004-04-22
ITMI981573A1 (it) 2000-01-09
DE69915545T2 (de) 2005-03-24
EP0970784A2 (de) 2000-01-12
EP0970784A3 (de) 2002-06-05
ES2218902T3 (es) 2004-11-16

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