EP0547954B1 - Rotary die-cutting press - Google Patents
Rotary die-cutting press Download PDFInfo
- Publication number
- EP0547954B1 EP0547954B1 EP92403390A EP92403390A EP0547954B1 EP 0547954 B1 EP0547954 B1 EP 0547954B1 EP 92403390 A EP92403390 A EP 92403390A EP 92403390 A EP92403390 A EP 92403390A EP 0547954 B1 EP0547954 B1 EP 0547954B1
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- EP
- European Patent Office
- Prior art keywords
- bearing blocks
- vertical
- cutting
- cutting cylinder
- cylinder
- 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
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Classifications
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- 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
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
- B26D7/265—Journals, bearings or supports for positioning rollers or cylinders relatively to each other
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- 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
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/465—Cutting motion of tool has component in direction of moving work
- Y10T83/4766—Orbital motion of cutting blade
- Y10T83/4795—Rotary tool
- Y10T83/483—With cooperating rotary cutter or backup
- Y10T83/4833—Cooperating tool axes adjustable relative to each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/465—Cutting motion of tool has component in direction of moving work
- Y10T83/4766—Orbital motion of cutting blade
- Y10T83/4795—Rotary tool
- Y10T83/483—With cooperating rotary cutter or backup
- Y10T83/4838—With anvil backup
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9309—Anvil
- Y10T83/9312—Rotatable type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9372—Rotatable type
Definitions
- the present invention relates to a rotary cutting apparatus which can be used more particularly in printing and shaping lines for folding cardboard boxes and self-adhesive labels.
- These devices are generally based on the principle of rolling, one on top of the other, of two superimposed cylinders, of parallel axes, one of which, namely the cutting cylinder itself, is engraved in relief while the The other cylinder or “anvil” cylinder is smooth.
- the two cylinders may have complementary engravings.
- the drive in rotation of the two cylinders, at the same peripheral speed but in opposite directions to each other, is ensured by connecting gears of the same pitch diameter chosen so that it remains, between the two cutting cylinders, a small constant distance necessary to ensure a good cut of the sheet of cardboard or paper passing between them, without there being any contact between the metal parts ensuring the cut.
- the interval which separates the two cutting cylinders from parallel axes is provided by rollers or raceways which are fixed to the ends of the two cylinders while being perfectly concentric with them.
- the diameter of each of these rollers is equal to the pitch diameter of the connecting gear. The cutting pressure can then be applied without reserve to the two cylinders.
- the diameter of the cutting rolls which depends on the cut format, must also be determined, depending on the width, so that the flexions used during cutting, added to the execution tolerances, are not greater than the theoretical distance between the cutting parts.
- Bending which occurs during the cutting operation, has two origins, namely the actual bending of the cylinders under the effect of a point or uniformly distributed load, due to the cutting force, and the bending caused by the bending moments due to the force exerted on the rockets of the cylinders.
- the present invention relates to improvements made to a rotary cutting apparatus of the aforementioned type making it possible to very significantly reduce the bending or deflection suffered by the cutting cylinder during a cutting operation.
- this rotary cutting apparatus comprising a frame supporting, between two parallel vertical uprights, two superimposed cutting cylinders, with parallel axes, namely an upper cutting cylinder and a lower cutting cylinder respectively secured to rolling raceways one on the other, the two opposite coaxial spindles of the upper cutting cylinder being mounted respectively in rotation in two opposite upper bearing blocks which can slide vertically on the two respective uprights, while that the two opposite coaxial spindles of the lower cutting cylinder are mounted respectively in rotation in two opposite lower bearing blocks, which can slide vertically on the two respective uprights, located respectively below the upper bearing blocks, each of the upper bearing blocks being extended, its upper part, towards the interior of the apparatus, by a cantilevered part subjected to the action, downwards, of a vertical pressurizing cylinder mounted on the upper part of the apparatus , while each of the lower bearing blocks is extended, at its lower part, towards the interior of the apparatus, by a cantilever part extending above a stop carried by the corresponding upright and with which it is in contact, is
- the rotary cutting device shown in Figures 1 and 2 comprises a frame consisting of two parallel vertical uprights 1,2 connected together by horizontal crosspieces not shown. Each of the uprights 1,2 is notched, in its upper part, with an opening 3 extending vertically, of rectangular shape and opening into the upper horizontal face of the upright. In the two opposite openings 3 is engaged an interchangeable cutting device consisting essentially of two upper 4 and lower 5 cutting cylinders, with parallel horizontal axes, between which a sheet of paper or cardboard to be cut must pass.
- the upper cutting cylinder 4 is extended, at its two ends, by two coaxial spindles 4a, 4b and it is integral with two raceways 6 located at a distance from the two end faces of the cutting cylinder 4 and between which is the part engraved with the cylinder 4.
- the lower cutting cylinder 5 which can be smooth ("anvil” cylinder) or engraved, is extended at its two ends by two coaxial rockets 5a, 5b.
- the upper raceways 6 run on the periphery of the smooth lower cylinder 5 which then constitutes, in the case of this "anvil” cylinder, two lower raceways in the two zones of contact with the upper raceways and they have a same diameter which is slightly greater than that of the upper cutting cylinder 4, so as to maintain between the two cylinders 4 and 5 a small gap necessary to ensure a good cut of the sheet of cardboard or paper passing between them, without however, there is contact between the metal parts ensuring the cut.
- the diameter of the upper raceways 6 is equal to that of the cylinder lower anvil 5 and with the pitch diameter of connecting gears 7,8, respectively secured to the left rockets 4a, 5a (in FIG. 1) of the cutting cylinders 4,5, outside the left upright 1.
- These gears of 7,8 link are engaged with each other and are rotated from the general control of the device.
- the rockets 4a, 4b and 5a, 5b of the cutting cylinders 4,5 are respectively mounted for rotation in superimposed blocks forming bearings, namely upper and lower bearing blocks 9, engaged closely in the openings 3 and able to slide vertically in these.
- Each upper bearing block 9 is extended, at its upper part, towards the interior of the apparatus, by a cantilever part 9a extending above the end part of the upper cutting cylinder 4.
- each lower bearing block 10 is extended, at its lower part, towards the interior of the apparatus, by a cantilever part 10a which extends below the end part of the lower cutting cylinder 5 and above a fixed added stop 11.
- This stop 11 is fixed, by means of screws, to the internal face of the corresponding upright 1.2 so that its upper horizontal face is situated at a level slightly higher than that where the lower edge of the opening is located 3.
- the internal cantilever part 10a of each lower bearing block 10 is normally supported on the upper face of the insert 11 and the lower face of this lower bearing block 10 is slightly apart ed from the bottom edge of the opening 3.
- the upper 9 and lower 10 bearing blocks of each pair of blocks are also connected to each other, as described in patent FR-A-2,645,790, by an elastic coupling device tending to lift each upper bearing block 9 relative to the lower bearing block 10 and allowing a limited vertical stroke of the upper bearing block 9 relative to the lower bearing block 10, this coupling device not being shown in the drawing for the purpose of simplifying it.
- the rotary cutting device comprises, at its upper part, a pressurizing frame 12 which comprises a central cross member 13 carrying, at its ends, two vertical pressurizing jacks 14.
- the rods of these jacks extend downward, and their lower ends are located just above the cantilever parts 9a of the upper bearing blocks 9 and in contact with them.
- the pressurizing frame 12 is preferably articulated as a whole, on one side, around a transverse axis and it can be stationary in a horizontal position, on the frame of the device, by any suitable means.
- the vertical pressurizing jacks 14 are mounted on the cross member 13 of the pressurizing frame 12, so that the vertical axis of each of these jacks 14 is contained in a vertical and transverse plane P situated between the plane vertical and transverse median P1 of the neighboring upper raceway 6 and the neighboring upper bearing block 9. Furthermore a shim or spacer 15, of adjustable height, is interposed between each pair of upper 9 and lower bearing blocks 10. This spacer 15 is located substantially in the vertical and transverse median plane P2 common to the two upper 9 and lower 10 bearing blocks of the same pair of blocks.
- Means are provided for adjusting, as desired, the height of the adjustable spacer 15.
- These means may include, for example, two vertical rods 16, passing from top to bottom each upper bearing block 9, on either side of the spindle 4a, 4b of the upper cutting cylinder 4, and at least the lower end parts 16a of which are threaded and screwed into corresponding tapped holes provided in the lower part of the block 9.
- the two end parts 16a of the rods 16 constitute the spacer 15 by bearing on the upper face of the lower bearing block 10.
- the two rods 16 are integral with respective pinions 17 engaged with a common central pinion 18 integral with a vernier 19. It is thus possible, by rotating this vernier 19, to adjust the height of which the lower parts 16a of the rods 16 protrude below the bearing block 9 and consequently the spacing between the two blocks 9 and 10.
- the pressurizing frame 12 When the rotary cutting device according to the invention is set in pressure, the pressurizing frame 12 extends horizontally and, when the two jacks 14 are put under pressure, their rods are pushed down, against the two upper bearing blocks 9.
- the force F produced by each of the jacks 14 is exerted downwards in the vertical and longitudinal plane P passing through the axis of the corresponding jack 14, it applies at a point A (FIG. 3) in the horizontal plane of support on the lower cutting cylinder 5 and it is supported by the fixed stop 11.
- the point A of application of the force F is located between, on the one hand, the median contact point B between the raceway 6 and the lower cylinder 5 and, on the other hand, the contact point C between the two blocks 9,10, by means of the spacer 15.
- each rocket 4a of the cylinder 4 is found to be embedded, together with the extreme part of the cylinder 4 to the path of r only 6, that is to say over the length of the segment CB. Due to this embedding, the bending that the upper cutting cylinder 4 undergoes, during a cutting operation, is much weaker than when there is no embedding due to the absence of the spacers 15. This is highlighted by the curves I and II of Figure 3 which respectively represent the arrows f and f1 that takes the cutting cylinder 4 during a cutting operation.
- Curve I gives the arrow f of the cutting cylinder 4 in the absence of embedding, that is to say when the spacers 15 are not provided, while curve II gives the arrow f1 obtained with an embedding the along the BC segments. It is clearly seen from these curves that the arrow f1 obtained, during a cutting operation, by means of the apparatus according to the invention is significantly lower, of the order of 5 times, than the arrow f that cylinder 4 takes when there is no embedding.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Details Of Cutting Devices (AREA)
- Road Repair (AREA)
- Milling Processes (AREA)
Description
La présente invention concerne un appareil de découpage rotatif utilisable plus particulièrement dans les lignes d'impression et de façonnage de boîtes pliantes en carton et d'étiquettes auto-adhésives.The present invention relates to a rotary cutting apparatus which can be used more particularly in printing and shaping lines for folding cardboard boxes and self-adhesive labels.
Ces appareils sont généralement basés sur le principe du roulement, l'un sur l'autre, de deux cylindres superposés, d'axes parallèles, dont l'un, à savoir le cylindre de coupe proprement dit, est gravé en relief alors que l'autre cylindre ou cylindre "enclume" est lisse. Toutefois, dans certains procédés, les deux cylindres peuvent comporter des gravures complémentaires. L'entraînement en rotation des deux cylindres, à la même vitesse périphérique mais en sens inverse l'un de l'autre, est assuré par des engrenages de liaison d'un même diamètre primitif choisi de manière qu'il subsiste, entre les deux cylindres de coupe, une faible distance constante nécessaire pour assurer une bonne coupe de la nappe de carton ou de papier passant entre eux, sans qu'il y ait pour autant un contact entre les parties métalliques assurant la coupe.These devices are generally based on the principle of rolling, one on top of the other, of two superimposed cylinders, of parallel axes, one of which, namely the cutting cylinder itself, is engraved in relief while the The other cylinder or "anvil" cylinder is smooth. However, in certain methods, the two cylinders may have complementary engravings. The drive in rotation of the two cylinders, at the same peripheral speed but in opposite directions to each other, is ensured by connecting gears of the same pitch diameter chosen so that it remains, between the two cutting cylinders, a small constant distance necessary to ensure a good cut of the sheet of cardboard or paper passing between them, without there being any contact between the metal parts ensuring the cut.
L'intervalle, qui sépare les deux cylindres de coupe d'axes parallèles, est assuré par des galets ou chemins de roulement qui sont fixés aux extrémités des deux cylindres en étant parfaitement concentriques avec ceux-ci. Le diamètre de chacun de ces galets de roulement est égal au diamètre primitif de l'engrenage de liaison. La pression de coupe peut être alors appliquée sans réserve sur les deux cylindres.The interval which separates the two cutting cylinders from parallel axes is provided by rollers or raceways which are fixed to the ends of the two cylinders while being perfectly concentric with them. The diameter of each of these rollers is equal to the pitch diameter of the connecting gear. The cutting pressure can then be applied without reserve to the two cylinders.
Le diamètre des cylindres de coupe, qui dépend du format découpé, doit être également déterminé, en fonction de la laize, de telle façon que les flexions mises en oeuvre lors de la coupe, ajoutées aux tolérances d'exécution, ne soient pas supérieures à la distance théorique qui sépare les parties coupantes. Les flexions, qui apparaissent lors de l'opération de coupe, ont deux origines à savoir la flexion proprement dite des cylindres sous l'effet d'une charge ponctuelle ou uniformément répartie, due à l'effort de coupe, et la flexion causée par les moments fléchissant dus à l'effort exercé sur les fusées des cylindres. Or il est nécessaire, surtout dans le cas de certains travaux nécessitant une grande précision et une coupe franche et sans poussière, de maintenir une flexion, c'est-à-dire une flèche du cylindre de coupe aussi faible que possible pendant l'opération de coupe proprement dite. Pour réduire cette flèche ou cette flexion du cylindre de coupe, on peut évidemment envisager d'utiliser un cylindre de coupe d'un grand diamètre mais ceci entraîne un coût d'outillage et de la structure d'accueil élevé. On a également proposé, ainsi qu'il est décrit dans le brevet FR-A-2 645 790, de supprimer la seconde flexion, c'est-à-dire celle provoquée par les moments fléchissants, grâce à une disposition particulière des vérins hydrauliques.The diameter of the cutting rolls, which depends on the cut format, must also be determined, depending on the width, so that the flexions used during cutting, added to the execution tolerances, are not greater than the theoretical distance between the cutting parts. Bending, which occurs during the cutting operation, has two origins, namely the actual bending of the cylinders under the effect of a point or uniformly distributed load, due to the cutting force, and the bending caused by the bending moments due to the force exerted on the rockets of the cylinders. However, it is necessary, especially in the case of certain works requiring high precision and a clean and dust-free cut, to maintain a flexion, that is to say an arrow of the cutting cylinder as low as possible during the operation. cutting proper. To reduce this deflection or this bending of the cutting cylinder, it is obviously possible to envisage using a cutting cylinder of a large diameter, but this results in a high cost of tooling and of the reception structure. It has also been proposed, as described in patent FR-A-2,645,790, to suppress the second bending, that is to say that caused by bending moments, by virtue of a particular arrangement of the hydraulic cylinders .
La présente invention concerne des perfectionnements apportés à un appareil de découpage rotatif du type précité permettant de réduire très sensiblement la flexion ou la flèche subie par le cylindre de coupe pendant une opération de découpage.The present invention relates to improvements made to a rotary cutting apparatus of the aforementioned type making it possible to very significantly reduce the bending or deflection suffered by the cutting cylinder during a cutting operation.
A cet effet cet appareil de découpage rotatif comportant un bâti supportant, entre deux montants verticaux parallèles, deux cylindres de coupe superposés, d'axes parallèles, à savoir un cylindre de coupe supérieur et un cylindre de coupe inférieur respectivement solidaires de chemins de roulements roulant les uns sur les autres, les deux fusées coaxiales opposées du cylindre de coupe supérieur étant montées respectivement à rotation dans deux blocs paliers supérieurs opposés pouvant coulisser verticalement sur les deux montants respectifs, tandis que les deux fusées coaxiales opposées du cylindre de coupe inférieur sont montées respectivement à rotation dans deux blocs paliers inférieurs opposés, pouvant coulisser verticalement sur les deux montants respectifs, situés respectivement en dessous des blocs paliers supérieurs, chacun des blocs paliers supérieurs étant prolongé, à sa partie supérieure, vers l'intérieur de l'appareil, par une partie en porte-à-faux soumise à l'action, vers le bas, d'un vérin vertical de mise en pression monté à la partie supérieure de l'appareil, tandis que chacun des blocs paliers inférieurs est prolongé, à sa partie inférieure, vers l'intérieur de l'appareil, par une partie en porte-à-faux s'étendant au-dessus d'une butée portée par le montant correspondant et avec laquelle elle est en contact, est caractérisé en ce qu'il comprend, entre chaque paire de blocs paliers supérieur et inférieur, une cale ou entretoise permettant un appui des deux blocs l'un sur l'autre et en ce que le plan vertical et transversal contenant l'axe de chaque vérin vertical de mise en pression est situé entre le plan vertical et transversal dans lequel est située la cale ou entretoise disposée entre les blocs paliers et le plan vertical et transversal des chemins de roulement des deux cylindres.To this end, this rotary cutting apparatus comprising a frame supporting, between two parallel vertical uprights, two superimposed cutting cylinders, with parallel axes, namely an upper cutting cylinder and a lower cutting cylinder respectively secured to rolling raceways one on the other, the two opposite coaxial spindles of the upper cutting cylinder being mounted respectively in rotation in two opposite upper bearing blocks which can slide vertically on the two respective uprights, while that the two opposite coaxial spindles of the lower cutting cylinder are mounted respectively in rotation in two opposite lower bearing blocks, which can slide vertically on the two respective uprights, located respectively below the upper bearing blocks, each of the upper bearing blocks being extended, its upper part, towards the interior of the apparatus, by a cantilevered part subjected to the action, downwards, of a vertical pressurizing cylinder mounted on the upper part of the apparatus , while each of the lower bearing blocks is extended, at its lower part, towards the interior of the apparatus, by a cantilever part extending above a stop carried by the corresponding upright and with which it is in contact, is characterized in that it comprises, between each pair of upper and lower bearing blocks, a shim or spacer allowing a support of the two blocks one on the other and in that the vertical and transverse plane containing the axis of each vertical pressurizing cylinder is located between the vertical and transverse plane in which the wedge or spacer is located disposed between the bearing blocks and the vertical and transverse plane of the paths of the two cylinders.
On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel :
- La figure 1 est une vue en coupe verticale et longitudinale d'un appareil de découpage rotatif suivant l'invention.
- La figure 2 est une vue en coupe verticale et transversale faite suivant la ligne II-II de la figure 1.
- La figure 3 est un schéma illustrant le principe mis en oeuvre, dans l'appareil de découpage, pour réaliser l'encastrement des fusées du cylindre de coupe.
- Figure 1 is a vertical and longitudinal sectional view of a rotary cutting apparatus according to the invention.
- Figure 2 is a vertical and cross-sectional view taken along line II-II of Figure 1.
- Figure 3 is a diagram illustrating the principle used in the cutting apparatus, for embedding the rockets of the cutting cylinder.
L'appareil de découpage rotatif représenté sur les figures 1 et 2 comprend un bâti constitué de deux montants verticaux parallèles 1,2 reliés entre eux par des traverses horizontales non représentées. Chacun des montants 1,2 est entaillé, dans sa partie supérieure, d'une ouverture 3 s'étendant verticalement, de forme rectangulaire et débouchant dans la face horizontale supérieure du montant. Dans les deux ouvertures opposées 3 est engagé un dispositif de découpage interchangeable constitué essentiellement par deux cylindres de coupe supérieur 4 et inférieur 5, d'axes horizontaux parallèles, entre lesquels doit passer une nappe de papier ou carton à découper. Le cylindre de coupe supérieur 4 est prolongé, à ses deux extrémités, par deux fusées coaxiales 4a,4b et il est solidaire de deux chemins de roulement 6 situés à distance des deux faces frontales du cylindre de coupe 4 et entre lesquels se trouve la partie gravée du cylindre 4. De la même façon le cylindre de coupe inférieur 5, qui peut être lisse (cylindre "enclume") ou gravé, est prolongé, à ses deux extrémités, par deux fusées coaxiales 5a,5b. Les chemins de roulement supérieurs 6 roulent sur la périphérie du cylindre inférieur lisse 5 qui constitue alors, dans le cas de ce cylindre "enclume", deux chemins de roulement inférieurs dans les deux zones de contact avec les chemins de roulement supérieurs et ils ont un même diamètre qui est légèrement supérieur à celui du cylindre de coupe supérieur 4, de manière à maintenir entre les deux cylindres 4 et 5 un faible intervalle nécessaire pour assurer une bonne coupe de la nappe de carton ou de papier passant entre eux, sans qu'il y ait pour autant un contact entre les parties métalliques assurant la coupe. Le diamètre des chemins de roulement supérieurs 6 est égal à celui du cylindre enclume inférieur 5 et au diamètre primitif d'engrenages de liaison 7,8, solidaires respectivement des fusées gauches 4a,5a (sur la figure 1) des cylindres de coupe 4,5, à l'extérieur du montant gauche 1. Ces engrenages de liaison 7,8 sont en prise l'un avec l'autre et sont entraînés en rotation à partir de la commande générale de l'appareil.The rotary cutting device shown in Figures 1 and 2 comprises a frame consisting of two parallel
Les fusées 4a,4b et 5a,5b des cylindres de coupe 4,5 sont respectivement montées à rotation dans des blocs superposés formant paliers, à savoir des blocs paliers supérieurs 9 et inférieurs 10, engagés étroitement dans les ouvertures 3 et pouvant coulisser verticalement dans celles-ci.The
Chaque bloc palier supérieur 9 est prolongé, à sa partie supérieure, vers l'intérieur de l'appareil, par une partie en porte-à-faux 9a s'étendant au-dessus de la partie extrême du cylindre de coupe supérieur 4. De la même façon chaque bloc palier inférieur 10 est prolongé, à sa partie inférieure, vers l'intérieur de l'appareil, par une partie en porte-à-faux 10a qui s'étend en dessous de la partie extrême du cylindre de coupe inférieur 5 et au-dessus d'une butée rapportée fixe 11. Cette butée 11 est fixée, au moyen de vis, sur la face interne du montant correspondant 1,2 de manière que sa face horizontale supérieure soit située à un niveau légèrement supérieur à celui où se trouve le bord inférieur de l'ouverture 3. De ce fait la partie interne en porte-à-faux 10a de chaque bloc palier inférieur 10 est normalement en appui sur la face supérieure de la butée rapportée 11 et la face inférieure de ce bloc palier inférieur 10 est légèrement écartée du bord inférieur de l'ouverture 3.Each
Les blocs paliers supérieur 9 et inférieur 10 de chaque paire de blocs sont également reliés l'un à l'autre, ainsi qu'il est décrit dans le brevet FR-A-2 645 790, par un dispositif d'accouplement élastique tendant à soulever chaque bloc palier supérieur 9 par rapport au bloc palier inférieur 10 et autorisant une course verticale limitée du bloc palier supérieur 9 par rapport au bloc palier inférieur 10, ce dispositif d'accouplement n'étant pas représenté sur le dessin dans un but de simplification de celui-ci.The upper 9 and lower 10 bearing blocks of each pair of blocks are also connected to each other, as described in patent FR-A-2,645,790, by an elastic coupling device tending to lift each
L'appareil de découpage rotatif suivant l'invention comporte, à sa partie supérieure, un cadre de mise en pression 12 qui comprend une traverse centrale 13 portant, à ses extrémités, deux vérins verticaux de mise en pression 14. Les tiges de ces vérins s'étendent vers le bas, et leurs extrémités inférieures sont situées juste au-dessus des parties en porte-à-faux 9a des blocs paliers supérieurs 9 et en contact avec celles-ci. Le cadre de mise en pression 12 est de préférence articulé dans son ensemble, d'un côté, autour d'un axe transversal et il peut être immobile en position horizontale, sur le bâti de l'appareil, par tous moyens appropriés.The rotary cutting device according to the invention comprises, at its upper part, a pressurizing
Les vérins de mise en pression verticaux 14 sont montés, sur la traverse 13 du cadre de mise en pression 12, de telle façon que l'axe vertical de chacun de ces vérins 14 soit contenu dans un plan vertical et transversal P situé entre le plan vertical et transversal médian P1 du chemin de roulement supérieur voisin 6 et le bloc palier supérieur voisin 9. Par ailleurs une cale ou entretoise 15, de hauteur réglable, est interposée entre chaque paire de blocs paliers supérieur 9 et inférieur 10. Cette entretoise 15 est située sensiblement dans le plan vertical et transversal médian P2 commun aux deux blocs paliers supérieur 9 et inférieur 10 d'une même paire de blocs.The vertical pressurizing
Des moyens sont prévus pour ajuster, à volonté, la hauteur de l'entretoise réglable 15. Ces moyens peuvent comprendre, par exemple, deux tiges verticales 16, traversant de haut en bas chaque bloc palier supérieur 9, de part et d'autre de la fusée 4a,4b du cylindre de coupe supérieur 4, et dont au moins les parties extrêmes inférieures 16a sont filetées et vissées dans des trous taraudés correspondants prévus dans la partie inférieure du bloc 9. Les deux parties extrêmes 16a des tiges 16 constituent l'entretoise 15 en prenant appui sur la face supérieure du bloc palier inférieur 10. A leurs extrémités supérieures les deux tiges 16 sont solidaires de pignons respectifs 17 en prise avec un pignon central commun 18 solidaire d'un vernier 19. Il est ainsi possible, en faisant tourner ce vernier 19, d'ajuster la hauteur dont les parties inférieures 16a des tiges 16 font saillie en-dessous du bloc palier 9 et par conséquent l'écartement entre les deux blocs 9 et 10.Means are provided for adjusting, as desired, the height of the
Lorsque l'appareil de découpage rotatif suivant l'invention est calé en pression, le cadre de mise en pression 12 s'étend horizontalement et, lorsque les deux vérins 14 sont mis en pression, leurs tiges sont repoussées vers le bas, contre les deux blocs paliers supérieurs 9. La force F produite par chacun des vérins 14 s'exerce vers le bas dans le plan vertical et longitudinal P passant par l'axe du vérin correspondant 14, elle s'applique en un point A (figure 3) dans le plan horizontal d'appui sur le cylindre de coupe inférieur 5 et elle est supportée par la butée fixe 11. Le point A d'application de l'effort F est situé entre, d'une part, le point de contact médian B entre le chemin de roulement 6 et le cylindre inférieur 5 et, d'autre part, le point de contact C entre les deux blocs 9,10, par l'intermédiaire de l'entretoise 15. De ce fait chaque fusée 4a du cylindre 4 se trouve être encastrée, conjointement avec la partie extrême du cylindre 4 jusqu'au chemin de roulement 6, c'est-à-dire sur la longueur du segment CB. Du fait de cet encastrement la flexion que subit le cylindre de coupe supérieur 4, pendant une opération de découpage, est beaucoup plus faible que lorsqu'il n'y a pas d'encastrement par suite de l'absence des entretoises 15. Ceci est mis en évidence par les courbes I et II de la figure 3 qui représentent respectivement les flèches f et f1 que prend le cylindre de coupe 4 pendant une opération de découpage. La courbe I donne la flèche f du cylindre de coupe 4 en l'absence d'encastrement, c'est-à-dire lorsque les entretoises 15 ne sont pas prévues, alors que la courbe II donne la flèche f1 obtenue avec un encastrement le long des segments BC. On voit clairement, d'après ces courbes, que la flèche f1 obtenue, au cours d'une opération de découpage, au moyen de l'appareil suivant l'invention est nettement inférieure, de l'ordre de 5 fois, à la flèche f que prend le cylindre 4 lorsqu'il n'y a pas d'encastrement. Une telle réduction de la flèche du cylindre de coupe 4 permet d'utiliser, avec la même déformation en flexion, des cylindres dont le diamètre est égal aux deux tiers de celui des cylindres couramment utilisés et par conséquent de réaliser un gain substantiel sur le coût des outillages et des structures d'accueil, ou bien encore d'obtenir, avec des cylindres de même diamètre, une qualité de coupe bien supérieure, nette et sans poussière.When the rotary cutting device according to the invention is set in pressure, the
Claims (4)
- Rotary die-cutting apparatus comprising a frame supporting, between two vertical parallel uprights (1, 2), two superimposed and parallel cutting cylinders (4, 5), namely an upper cutting cylinder (4) and a lower cutting cylinder (5) respectively rigidly associated with raceways (6, 5) rolling onto each other, the two opposite axial spindles (4a, 4b) of the upper cutting cylinder (4) being respectively rotatably mounted in two opposite upper bearing blocks (9) vertically slidable on the two respective uprights (1, 2), while the two opposite coaxial spindles (5a, 5b) of the lower cutting cylinder are respectively rotatably mounted in two opposite lower bearing blocks (10), slidable vertically on the two respective uprights (1, 2), situated respectively below the upper bearing blocks (9), each of the upper bearing blocks (9) being extended, in its upper portion and toward inside of the apparatus, by a cantilevered portion (9a) subjected to the action, in a downward direction, of a pressure exerting vertical jack (14) mounted at the upper portion of the apparatus, while each of the lower bearing blocks (10) is extended, in its lower portion and toward the inside of the apparatus, by a cantilevered portion (10a) extending above an abutment (11) carried by the corresponding upright (1, 2) and with which it is in contact, characterized in that it comprises, between each pair of the upper (9) and lower (10) bearing blocks, a shim or strut (15) which provides a support for the two bearing blocks (10) on one another, and in that the vertical and transverse plane (P) containing the central axis of each pressure exerting vertical jack (14) is situated between the vertical and transverse plane (P2) in which is situated the shim or strut (15) placed between the bearing blocks (9, 10) and the vertical and transverse plane (P1) of the raceways (6, 5) of the two cylinders.
- Apparatus according to claim 1, characterized in that means are provided for adjusting the height of the shims or struts (15).
- Apparatus according to claim 2, characterized in that the means for adjusting the height of the shims or strust (15) comprise two vertical rods (16), extending from top to bottom through each upper bearing block (9), on either side of the spindle (4a, 4b) of the upper cutting cylinder (4), and at least the lower extreme portions (16a) of which are threaded and screwed into corresponding tapped holes provided in the lower portion of the block (9), these two extreme portions (16a) of the rods (16) forming the strut (15) coming to bear on the upper face of the lower bearing block (10), and at their upper ends the two rods (16) are rigidly connected to respective pinions (17) in mesh with a common central pinion (18) rigidly connected to a vernier (19).
- Apparatus according to any one of the proceeding claims, characterized in that the upper cutting cylinder (4) carries two raceways (6) situated at a distance from its two frontal faces.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9115587A FR2684913B1 (en) | 1991-12-16 | 1991-12-16 | ROTARY CUTTING APPARATUS. |
FR9115587 | 1991-12-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0547954A1 EP0547954A1 (en) | 1993-06-23 |
EP0547954B1 true EP0547954B1 (en) | 1995-10-18 |
Family
ID=9420085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92403390A Expired - Lifetime EP0547954B1 (en) | 1991-12-16 | 1992-12-14 | Rotary die-cutting press |
Country Status (7)
Country | Link |
---|---|
US (1) | US5301583A (en) |
EP (1) | EP0547954B1 (en) |
JP (1) | JPH05318392A (en) |
CN (1) | CN1031330C (en) |
DE (1) | DE69205554T2 (en) |
ES (1) | ES2078005T3 (en) |
FR (1) | FR2684913B1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6209433B1 (en) * | 1998-02-10 | 2001-04-03 | Delta Industrial Services, Inc. | Single revolution die cutter |
IT1302771B1 (en) * | 1998-09-29 | 2000-09-29 | Danieli & C Ohg Sp | CONTINUOUS ROTATION SHEAR |
DE10044705C1 (en) * | 2000-09-09 | 2002-02-21 | Aichele Werkzeuge Gmbh | A rotary cutter |
NL1024915C2 (en) * | 2003-12-01 | 2005-06-06 | Jean Henry Robert Madern | Device for making a cut, groove and the like, comprising a plate-shaped system. |
SE527838C2 (en) * | 2004-07-02 | 2006-06-20 | Sandvik Intellectual Property | A rotary knife and a rotary knife device provided with such a rotary knife |
SE527556C2 (en) * | 2004-07-02 | 2006-04-11 | Sandvik Intellectual Property | A support roller for a rotary knife unit and a rotation knife unit with such a support roller |
EP1804992B1 (en) * | 2004-10-08 | 2010-03-24 | Western Printing Machinery Company | Die holder assembly for rotary cutting system |
EP1952956A1 (en) * | 2007-02-02 | 2008-08-06 | Müller Martini Holding AG | Device for cutting printed products fed in an overlapping formation |
US20120234152A1 (en) * | 2009-07-29 | 2012-09-20 | James Carmichael | Cutting unit for labelling machines with a multiple-blade rotary drum |
CN101712163B (en) * | 2009-11-18 | 2012-07-18 | 佛山市南海富利包装机械有限公司 | Cutter shaft structure for spiral transverse cutting machine |
CN106514767A (en) * | 2015-09-09 | 2017-03-22 | 上海景奕电子科技有限公司 | Negative shaft attaching roller suitable for circular knife machine |
GB201703644D0 (en) | 2017-03-07 | 2017-04-19 | Elopak As | Improvements in or relating to toller mounting arrangements |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB398169A (en) * | 1932-03-01 | 1933-09-01 | Arthur Bingham | Improvements in mountings for roller spindles |
US3348477A (en) * | 1961-01-12 | 1967-10-24 | Hudson Pulp & Paper Corp | Paper converting, and particularly producing improved paper towels |
DE1243000B (en) * | 1963-09-26 | 1967-06-22 | Smithe Machine Co Inc F L | Method and device for maintaining a desired distance between the cutting edge of a tool held on a roller and a counter roller |
DE2912458A1 (en) * | 1979-03-29 | 1980-10-09 | Winkler Duennebier Kg Masch | ROTATIONAL PUNCHING AGAINST THE CUTTER ROLLER SUPPORTED |
US4507996A (en) * | 1982-11-15 | 1985-04-02 | Preston Engravers, Inc. | Device for transferring and monitoring load to die roll |
US4455903A (en) * | 1982-11-15 | 1984-06-26 | Preston Engravers, Inc. | Adjustable anvil roll |
US4608895A (en) * | 1984-03-14 | 1986-09-02 | Bernal Rotary Systems, Inc. | Rotary die cutting |
FR2578193B1 (en) * | 1985-01-07 | 1989-06-23 | Lacan Jacques | COLD PLASTIFICATION MACHINE |
FR2595610A1 (en) * | 1986-03-13 | 1987-09-18 | Gautier Jean | ROTATING CUTTING OR FLOORING DEVICE FOR FLAT PRODUCTS |
US4732082A (en) * | 1986-06-25 | 1988-03-22 | Carl Ireton | Apparatus and method for mounting embossing rollers in a press line |
FR2645790A1 (en) * | 1989-03-30 | 1990-10-19 | Umat | ROTARY CUTTING APPARATUS |
-
1991
- 1991-12-16 FR FR9115587A patent/FR2684913B1/en not_active Expired - Lifetime
-
1992
- 1992-12-14 ES ES92403390T patent/ES2078005T3/en not_active Expired - Lifetime
- 1992-12-14 EP EP92403390A patent/EP0547954B1/en not_active Expired - Lifetime
- 1992-12-14 DE DE69205554T patent/DE69205554T2/en not_active Expired - Fee Related
- 1992-12-15 US US07/990,438 patent/US5301583A/en not_active Expired - Lifetime
- 1992-12-15 JP JP4334549A patent/JPH05318392A/en active Pending
- 1992-12-16 CN CN92114606A patent/CN1031330C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69205554D1 (en) | 1995-11-23 |
FR2684913B1 (en) | 1996-02-02 |
JPH05318392A (en) | 1993-12-03 |
DE69205554T2 (en) | 1996-04-11 |
ES2078005T3 (en) | 1995-12-01 |
US5301583A (en) | 1994-04-12 |
CN1073392A (en) | 1993-06-23 |
EP0547954A1 (en) | 1993-06-23 |
FR2684913A1 (en) | 1993-06-18 |
CN1031330C (en) | 1996-03-20 |
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