FR2540029A1 - Rotary cutter, in particular for corrugated card - Google Patents

Rotary cutter, in particular for corrugated card Download PDF

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Publication number
FR2540029A1
FR2540029A1 FR8301305A FR8301305A FR2540029A1 FR 2540029 A1 FR2540029 A1 FR 2540029A1 FR 8301305 A FR8301305 A FR 8301305A FR 8301305 A FR8301305 A FR 8301305A FR 2540029 A1 FR2540029 A1 FR 2540029A1
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FR
France
Prior art keywords
cutting
rotary cutter
cylinders
blades
conjugate
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.)
Granted
Application number
FR8301305A
Other languages
French (fr)
Other versions
FR2540029B1 (en
Inventor
Henri Gibert
Pierre Vacher
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.)
Martin SA
Original Assignee
Martin SA
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 Martin SA filed Critical Martin SA
Priority to FR8301305A priority Critical patent/FR2540029A1/en
Publication of FR2540029A1 publication Critical patent/FR2540029A1/en
Application granted granted Critical
Publication of FR2540029B1 publication Critical patent/FR2540029B1/fr
Granted 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
    • B26D1/56—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
    • 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
    • B26D1/0006—Cutting members therefor
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades

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

Abstract

Rotary cutter, in particular for corrugated card. Rotary cutter intended for cutting a continuously moving web of corrugated card into segments. One of the conjugate blades 11 is straight and parallel to the axis of the cutting cylinders 1, 2 whilst the other has a very wide V shape.

Description

Coupeuse rotative, en particulier pour le carton ondulé
La présente invention se rapporte à une coupeuse rotative, telle qu'une coupeuse destinée à la découpe en segments d'une bande de carton ondulé défilant continûment.Rotary cutter, especially for corrugated cardboard
The present invention relates to a rotary cutter, such as a cutter intended for cutting into segments a strip of corrugated cardboard which runs continuously.

Les coupeuses rotatives connues actuellement comportent deux cylindres rotatifs porte-lames placés l'un au-dessus de l'autre et tournant en sens inverses. Chacun des cylindres est muni d'une lame à filet coupant rectiligne.En général l'une des lames est droite, l'autre comporte une ou deux pentes pour que la coupe ne soit pas instantanée mais progressive, soit des extrémités vers le centre, soit d'une extrémité à l'autre. La coupe s'effectue par la mise en contact progressive des deux lames conjuguées pendant le croisement de celles-ci au cours de la rotation. Rotary cutters currently known comprise two rotary blade-holder cylinders placed one above the other and rotating in opposite directions. Each of the cylinders is fitted with a straight cutting blade, generally one of the blades is straight, the other has one or two slopes so that the cutting is not instantaneous but progressive, ie from the ends towards the center, either from one end to the other. The cutting is carried out by the progressive contacting of the two conjugate blades during the crossing of these during rotation.

En raison de l'utilisation de ces machines à grande vitesse, il s'ensuit des phénomènes de vibration5 qui nuisent à la coupe surtout pour des papiers difficiles à couper en raison de leur humidité ou de leur composition. Ces derniers présentent alors à la coupe des bavures effilochées ou des refus partiels de coupe dus à un phénomène de perte de contact des lames pendant la coupe. Ce phénomène est maximal au centre, les flexions dues aux vibrations y étant également maximales. L'examen de la courbe de vibrations des porte-lames fait apparattre dans certaines plages de vitesse un phénomène de résonance caractéristique qui est fonction de la fréquence propre desdits porte-lames et du temps qui s'écoule entre le début et la fin de la coupe progressive. Ce phénomène de résonance au centre amplifie considérablement la flexion donc l'écartement entre les lames. Due to the use of these high-speed machines, vibration phenomena5 ensue which affect cutting, especially for papers that are difficult to cut because of their humidity or their composition. The latter then present at cutting frayed burrs or partial refusals of cutting due to a phenomenon of loss of contact of the blades during cutting. This phenomenon is maximum at the center, the flexions due to vibrations there being also maximum. Examination of the vibration curve of the blade holders reveals in certain speed ranges a characteristic resonance phenomenon which is a function of the natural frequency of said blade holders and of the time which elapses between the start and the end of the progressive cutting. This phenomenon of resonance in the center considerably amplifies the bending therefore the spacing between the blades.

La présente invention a pour but d'éliminer ce phénomène de rdso- nance au centre et de le déplacer vers les extrémités des porte-lames. The object of the present invention is to eliminate this phenomenon of center balance and to move it towards the ends of the blade holders.

Alors il devient beaucoup moins gênant, car les flexions sont très limitées par les paliers dans les bâtis de la machine qui se trouvent à proximité.Then it becomes much less annoying, because the flexures are very limited by the bearings in the frames of the machine which are located nearby.

La coupeuse de l'invention est caractérisé en ce qu'elle est équipée de lames conjuguées dont l'une est rectiligne et parallèle à l'axe des cylindres de coupe, et l'autre présente deux pentes pointant en descendant vers le milieu de façon à former un V dont la pointe est substantiellement située dans le plan transversal de symétrie des cylindres de coupe.The cutter of the invention is characterized in that it is equipped with conjugate blades, one of which is rectilinear and parallel to the axis of the cutting cylinders, and the other has two slopes pointing downwards towards the middle so forming a V whose tip is substantially located in the transverse plane of symmetry of the cutting cylinders.

L'invention sera mieux comprise à l'aide de la description suivante d'un exemple de réalisation en référence aux dessins annexés dans lesquels - la figure 1 est une vue schématique en coupe longitudinale d'une coupeuse rotative conforme à l'invention, - la figure 2 est une coupe transversale schématique de la coupeuse de la figure 1.  The invention will be better understood with the aid of the following description of an exemplary embodiment with reference to the appended drawings in which - FIG. 1 is a schematic view in longitudinal section of a rotary cutter according to the invention, - Figure 2 is a schematic cross section of the cutter of Figure 1.

En se reportant à l'ensemble des figures I ee 2, la coupeuse à carton représentée comporte, de manière très classique, un cylindre de coupe supérieur 1 et un cylindre de coupe inférieur 2 entraînés en rotation à l'aide d'un arbre de transmission 3 et des engrenages (4, 5, 6). Les cylindres de coupe 1 et 2 sont portés par le bâti 7 de la machine à l'aide de paliers de roulement 8. La coupe du carton 9 s'effectue par le croisement progressif de deux lames conjuguées (10, 11) portées respectivement par le cylindre supérieur 1 et le cylindre inférieur 2. Referring to all of Figures I ee 2, the cardboard cutter shown comprises, very conventionally, an upper cutting cylinder 1 and a lower cutting cylinder 2 rotated by means of a shaft. transmission 3 and gears (4, 5, 6). The cutting cylinders 1 and 2 are carried by the frame 7 of the machine using rolling bearings 8. The cutting of the cardboard 9 is carried out by the progressive crossing of two conjugate blades (10, 11) carried respectively by the upper cylinder 1 and the lower cylinder 2.

Conformément à l'invention, la lame inférieure 11 a, comme dans les dispositifs classiques, un bord de coupe rectiligne et parallèle à l'axe longitudinal des cylindres de coupe. Par contre, la lame supérieure 10 a un bord présentant deux pentes pointant en descendant vers le milieu, et formant un angle a avec l'horizontale de l'ordre d'un demi-degré, de sorte qué la lame 10 à une forme de V très évasé dont la pointe est située dans le plan de symétrie transversal des cylindres de coupe. According to the invention, the lower blade 11 has, as in conventional devices, a straight cutting edge parallel to the longitudinal axis of the cutting rollers. On the other hand, the upper blade 10 has an edge having two slopes pointing downwards towards the middle, and forming an angle a with the horizontal of the order of half a degree, so that the blade 10 has a shape of V very flared whose tip is located in the transverse plane of symmetry of the cutting cylinders.

Avec le dispositif de l'invention, la coupe s'effectue progressivement à partir du centre de la bande 9 vers ses extrémités. Le début de la première -période de vibration des cylindres porte-lames lors d'une coupe se situe alors au centre dès le commencement de la coupe, et il ne peut y avoir de phénomène de résonance en ce point.  With the device of the invention, the cutting is carried out gradually from the center of the strip 9 towards its ends. The start of the first vibration period of the blade cylinders during a cut is then located in the center from the start of the cut, and there can be no resonance phenomenon at this point.

Claims (2)

REVENDICATIONS 1. Coupeuse rotative du type comportant deux cylindres rotatifs (1, 2) munis de lames de coupe (10, il) conjuguées, caractérisée en ce qu'une des deux lames conjuguées (11) a un bord rectiligne et parallèle à l'axe des cylindres de coupe, tandis que l'autre (10) a son bord -présentant deux pentes pointant en descendant vers le milieu en formant un V évasé dont la pointe est substantiellement située dans le plan de symétrie des cylindres de coupe. 1. Rotary cutter of the type comprising two rotary cylinders (1, 2) provided with conjugate cutting blades (10, il), characterized in that one of the two conjugate blades (11) has a straight edge and parallel to the axis cutting cylinders, while the other (10) has its edge - having two slopes pointing downward towards the middle, forming a flared V whose tip is substantially located in the plane of symmetry of the cutting cylinders. 2. Coupeuse rotative selon la revendication 1, caractérisé en ce que lesdites pentes sont définies par un angle (a) par rapport à l'horizontale d'une valeur de l'ordre d'un demi-degré.  2. Rotary cutter according to claim 1, characterized in that said slopes are defined by an angle (a) relative to the horizontal of a value of the order of half a degree.
FR8301305A 1983-01-28 1983-01-28 Rotary cutter, in particular for corrugated card Granted FR2540029A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8301305A FR2540029A1 (en) 1983-01-28 1983-01-28 Rotary cutter, in particular for corrugated card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8301305A FR2540029A1 (en) 1983-01-28 1983-01-28 Rotary cutter, in particular for corrugated card

Publications (2)

Publication Number Publication Date
FR2540029A1 true FR2540029A1 (en) 1984-08-03
FR2540029B1 FR2540029B1 (en) 1985-04-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8301305A Granted FR2540029A1 (en) 1983-01-28 1983-01-28 Rotary cutter, in particular for corrugated card

Country Status (1)

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FR (1) FR2540029A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246957A (en) * 1939-02-20 1941-06-24 S & S Corrugated Paper Mach Continuous rotary shearing mechanism
US2805715A (en) * 1954-06-08 1957-09-10 Smithe Machine Co Inc F L Flying cutter
US3828636A (en) * 1973-03-21 1974-08-13 Pratt Mfg Corp Rotary cutting apparatus
DE2825898A1 (en) * 1977-06-17 1979-01-04 Merrill David Martin ROTARY SHEARING MACHINE
SU829356A1 (en) * 1979-06-15 1981-05-15 Предприятие П/Я А-7697 Drum-type shears
SU863203A1 (en) * 1978-05-24 1981-09-15 Магнитогорский горно-металлургический институт им. Г.И. Носова Drum-type flying shears

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246957A (en) * 1939-02-20 1941-06-24 S & S Corrugated Paper Mach Continuous rotary shearing mechanism
US2805715A (en) * 1954-06-08 1957-09-10 Smithe Machine Co Inc F L Flying cutter
US3828636A (en) * 1973-03-21 1974-08-13 Pratt Mfg Corp Rotary cutting apparatus
DE2825898A1 (en) * 1977-06-17 1979-01-04 Merrill David Martin ROTARY SHEARING MACHINE
SU863203A1 (en) * 1978-05-24 1981-09-15 Магнитогорский горно-металлургический институт им. Г.И. Носова Drum-type flying shears
SU829356A1 (en) * 1979-06-15 1981-05-15 Предприятие П/Я А-7697 Drum-type shears

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT PUBLICATION LTD., semaine E08, publié le 7 avril 1982, London, G.B. & SU - A - 829 356 (TSELIKOV) *
DERWENT PUBLICATION LTD., semaine E27, publié le 8 août 1982, London, G.B. & SU - A - 863 203 (MAGN MINING METAL) *

Also Published As

Publication number Publication date
FR2540029B1 (en) 1985-04-12

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