WO2000013862A1 - Procede et appareil de synchronisation d'elements coupants dans un dispositif de decoupe transversale pour materiau en bande - Google Patents

Procede et appareil de synchronisation d'elements coupants dans un dispositif de decoupe transversale pour materiau en bande Download PDF

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Publication number
WO2000013862A1
WO2000013862A1 PCT/FI1999/000680 FI9900680W WO0013862A1 WO 2000013862 A1 WO2000013862 A1 WO 2000013862A1 FI 9900680 W FI9900680 W FI 9900680W WO 0013862 A1 WO0013862 A1 WO 0013862A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolls
web
belt
synchronization element
set forth
Prior art date
Application number
PCT/FI1999/000680
Other languages
English (en)
Inventor
Martti Karhu
Original Assignee
Metso Paper, Inc.
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 Metso Paper, Inc. filed Critical Metso Paper, Inc.
Priority to AU53746/99A priority Critical patent/AU5374699A/en
Publication of WO2000013862A1 publication Critical patent/WO2000013862A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • 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
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • B26D5/22—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed having the cutting member and work feed mechanically connected

Definitions

  • the present invention relates to a method and an apparatus for the syn- chronization of cutting elements in a cross-cutter for a web-like material, wherein the web to be cut is guided between rolls provided with the cutting elements to a cutting point at which the cutting elements cut a web-like material as the rolls are rotating.
  • One apparatus for cutting a web-like material such as paper, board, and pulp, comprises so-called twin rotary cutters, wherein the web to be cut is guided through a cutting point constituted by two rolls, the circumferential surface of said rolls being provided with cutting knives. As the rolls are rotating, the knives must coincide with each other at the cutting point.
  • the knife rolls must rotate at an extreme precision and also in a synchronized fashion, such that the cutting knife and its backing roll always and continually coincide with each other, even at high running speeds.
  • the synchronization is generally effected by means of a gearing, its gearwheels rotating in an oil bath.
  • the equipment is provided with a mechanism for eliminating the clearance for providing a precise synchronization.
  • An object of the invention is to provide a reliable synchronizer which is simpler than the prior art mechanisms.
  • the rolls be synchronized relative to each other in terms of the motion thereof by connecting the rolls functionally by means of at least one belt-like synchronization element external of the web run, at least one of said rolls being provided with a drive.
  • the method of the invention can be carried out by using a separate drive wheel, the belt-like synchronizer element of the invention being coupled therewith in addition to the rolls.
  • the belt-like synchronizer element used in the invention comprises preferably a two-sided cogged belt, which is functionally linked with the rolls and possibly with the drive wheel.
  • the belt can be regulated in terms of its tightness by using a jockey pulley, the synchronizer element extending therearound in addition to the rolls and optionally the drive wheel.
  • the invention relates also to an apparatus for implementing the above method, said apparatus being characterized in that the rolls, at least one of which is provided with a drive, have at least one end thereof, or a section of the roll periphery external of the web run, provided with a coupling ring for a belt-like synchronization element functionally linking the rolls.
  • the rolls at least one of which is provided with a drive
  • the rolls have at least one end thereof, or a section of the roll periphery external of the web run, provided with a coupling ring for a belt-like synchronization element functionally linking the rolls.
  • one or both of the rolls are driven.
  • the synchronization element comprises a two- sided cogged belt, which enables a gearless drive and a cooperation be- tween the rolls, the drive wheel, and optionally a jockey pulley.
  • the present invention relates to a continuous-action cross- cutter assembly for a web-like material, such as a web of pulp or the like, said assembly comprising two parallel rolls, forming therebetween a cutting line for the web and which rolls are adapted to rotate in such a way that each roll's cutting elements coincide with each other at the cutting line as the rolls are rotating.
  • This assembly of the invention is characterized in that the rolls, at least one of which is provided with a drive, have at least one end thereof, or a section of the roll periphery external of the web run, provided with a coupling ring for a belt-like synchronization element functionally linking the rolls.
  • the invention relates to a continuous-action sheet cutting unit for a pulp drying machine, comprising at least a slitter mechanism for a pulp web for slitting the same with a plurality of crosswise adjusted slitter devices into lengthwise separate webs, a cross-cutter assembly for cutting the separate webs into sheets,
  • bale table or the like for stacking the sheets into bales thereon, and possibly an additional cutter for cutting the baled sheets to a smaller size, said unit employing the above-described continuous-action cross-cutter assembly for a web-like material.
  • the method and apparatus of the invention are simple in terms of operation and construction, have a clearance-free drive, nor does the apparatus require separate processes for eliminating the clearance.
  • all that is needed are lightweighted protective elements and complicated and bulky gear transmissions can be completely omitted.
  • the invention is particularly applicable in cutting methods or the like mak- ing use of penetrating, wherein the knife clearance has a minor importance.
  • cutting knife used in this specification and claims refers to a knife or other element for severing a web by cutting, penetrating, or by another such method.
  • the figure shows one embodiment of the invention in an end view.
  • the knife 6 and its backing knife 7 coincide with each other at a cutting line formed by the knives for cutting the web 8 crosswise. It is obvious that the knives 6, 7 must have a precise synchronization, such that the knife 6 and its backing knife 7 always hit the right spot at the right time. This synchronization will be all the more important, the higher the machine running speeds will become.
  • the end surfaces of the rolls 1 and 2 are provided with rings, beneath the roll 2 is a small vertically movable roll 3, as well as alongside the rolls 1 and 2 is yet a further roll, i.e. a drive roll 4. All these rolls are linked by a belt-like synchronization element 5, which in the depicted case comprises a cogged belt 9 as shown in the detail of the drawing.
  • the synchronization element 5 extends around about half of the circumference of the drive roll and continues therefrom to the bottom roll 2 and runs around a ring-shaped element in its end surface and continues therefrom directly downwards to the jockey pulley 3.
  • the circuit is complete and the endless synchronization element 5, preferably a two-sided cogged belt 9, connects all relevant rolls, the bottom roll 2 functioning at the same time as a reversing roll, wherein one side of the cogged belt is in contact with the end ring.
  • the end rings of the rolls 1 and 2 whose diameter in the depicted case is substantially smaller than the overall roll diameter, the jockey pulley 3 as well as the drive wheel 4 are respectively provided with a toothed rim which meshes with the toothing of the cogged belt 9.
  • the cogged belt 9 couples with the rolls 1 and 2 by way of toothed wheels (toothing not shown in the drawing) present at the ends thereof. It is naturally also possible that the toothed wheel is mounted on the roll mantle or belt, in which case it is necessary to make sure that the toothed wheel is not in contact with the web run itself.
  • the apparatus is provided with a separate drive wheel 4. In an alternative solution, it can be omitted, one or both of the rolls 1 , 2 being driven.
  • the drawing shows the machine in an end view, the synchronization element of the invention being mounted on one end of the apparatus. It is also possible that the other end of the apparatus, opposite to the end shown in the figure, be provided with a similar type of synchronization element.
  • the illustrated method and mechanical solution can be implemented in any cross-cutting assembly, in addition to which it can be fitted subsequently in currently existing equipment.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention se rapporte à un procédé et à un appareil de synchronisation d'éléments coupants (6, 7) dans un dispositif de découpe transversale pour matériau se présentant sous forme de bande (8), dans lequel la bande (8) à découper est amenée entre des cylindres (1, 2) équipés desdits éléments coupants (6, 7). Lesdits cylindres (1, 2) sont fonctionnellement reliés au moyen d'au moins un élément de synchronisation (5) de type courroie reliant ces rouleaux et l'extérieur du chemin emprunté par la bande (8). Cette invention se rapporte également à un ensemble de découpe transversale à fonctionnement continu pour matériau en bande (8), tel qu'une bande de papier ou analogue, ainsi qu'à une unité de coupe à fonctionnement continu destinée à une machine de séchage de pâte.
PCT/FI1999/000680 1998-09-02 1999-08-17 Procede et appareil de synchronisation d'elements coupants dans un dispositif de decoupe transversale pour materiau en bande WO2000013862A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53746/99A AU5374699A (en) 1998-09-02 1999-08-17 Method and apparatus for the synchronization of cutting elements in a cross-cutter for a web-like material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981872 1998-09-02
FI981872A FI981872A (fi) 1998-09-02 1998-09-02 Menetelmä ja laite leikkauselimien tahdistamiseksi rainamaisen aineen poikkileikkauslaitteessa

Publications (1)

Publication Number Publication Date
WO2000013862A1 true WO2000013862A1 (fr) 2000-03-16

Family

ID=8552397

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000680 WO2000013862A1 (fr) 1998-09-02 1999-08-17 Procede et appareil de synchronisation d'elements coupants dans un dispositif de decoupe transversale pour materiau en bande

Country Status (3)

Country Link
AU (1) AU5374699A (fr)
FI (1) FI981872A (fr)
WO (1) WO2000013862A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2238423A1 (de) * 1971-08-02 1973-02-15 Minnesota Mining & Mfg Bandabschneidevorrichtung
DE2544532A1 (de) * 1974-10-16 1976-04-29 Smithe Machine Co Inc F L Antriebsvorrichtung fuer eine drehbare schneidvorrichtung
FR2497127A1 (fr) * 1980-12-29 1982-07-02 Carrier Corp Appareil et procede pour decouper des fentes dans des rubans d'ailette d'echangeur de chaleur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2238423A1 (de) * 1971-08-02 1973-02-15 Minnesota Mining & Mfg Bandabschneidevorrichtung
DE2544532A1 (de) * 1974-10-16 1976-04-29 Smithe Machine Co Inc F L Antriebsvorrichtung fuer eine drehbare schneidvorrichtung
FR2497127A1 (fr) * 1980-12-29 1982-07-02 Carrier Corp Appareil et procede pour decouper des fentes dans des rubans d'ailette d'echangeur de chaleur

Also Published As

Publication number Publication date
AU5374699A (en) 2000-03-27
FI981872A (fi) 2000-03-03
FI981872A0 (fi) 1998-09-02

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