EP0683046A1 - Mounting apparatus for mounting printing plates on support cylinders in flexographic machines - Google Patents

Mounting apparatus for mounting printing plates on support cylinders in flexographic machines Download PDF

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Publication number
EP0683046A1
EP0683046A1 EP95450008A EP95450008A EP0683046A1 EP 0683046 A1 EP0683046 A1 EP 0683046A1 EP 95450008 A EP95450008 A EP 95450008A EP 95450008 A EP95450008 A EP 95450008A EP 0683046 A1 EP0683046 A1 EP 0683046A1
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EP
European Patent Office
Prior art keywords
wall
sleeve
mounting
support cylinder
cylinder
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Granted
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EP95450008A
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German (de)
French (fr)
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EP0683046B1 (en
Inventor
Jean Francille
Philippe Francille
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • the present invention relates to a device for mounting printing sleeves on cylinders of flexographic printing machines.
  • Flexographic printing machines which comprise either cylinders on which the printing plates are directly fixed, for example with double-sided adhesives, or support cylinders on which are arranged plate sleeves, arranged coaxially with the support cylinder and designed to receive printing plates.
  • This sleeve-carrying cylinder is provided, at its periphery, with through holes, which creates an air mattress as soon as the sleeve begins to be sufficiently threaded, thus facilitating the mounting of this sleeve.
  • the present invention aims to overcome the drawbacks of the prior art as just summarized, by allowing the sleeves to be mounted relatively easily, by allowing mounting even on cylinders which are full or which are not equipped. air passage holes, by providing different variants for applications to flexographic printing machines whose mechanical characteristics are variable, leading to the manufacture of products having a lower cost price than those of the prior art, and by providing for the use of current materials, in particular composite materials, in order to achieve, in addition to the other advantages, weight savings.
  • the device for mounting a flexographic printing sleeve on a support cylinder comprises two flanges disposed at the ends of a rigid annular cylinder with an outer wall and an inner wall, designed to be coaxial to the support cylinder, the external face of the external wall of which is designed to support a printing plate and the internal wall of which is composed of an elastically and radially deformable wall, over at least part of its length, the internal face of this internal wall being arranged opposite the external face of the support cylinder, inner wall which forms with the outer wall a sealed chamber, connected by a valve to a source of fluid, so as to deform the elastically deformable wall and to press it on the outer face of the support cylinder.
  • the elastically deformable wall has a nominal internal diameter greater than that of the external diameter of the support cylinder and the fluid introduced into the chamber, after assembly is at a pressure greater than that of atmospheric pressure
  • the sleeve comprises an inflatable envelope, arranged in the hermetic chamber, equipped with a fluid connection endpiece so as to allow it to swell.
  • An improvement of the invention provides for having a bar equipped with sizes, arranged between the envelope and the inner face of the outer wall of the sleeve.
  • the elastically deformable wall has a nominal internal diameter less than that of the external diameter of the support cylinder and the fluid introduced into the chamber, before assembly, is at a pressure lower than that of the pressure atmospheric.
  • the invention also relates to a sleeve for the implementation of the device and this sleeve is made of composite material.
  • This composite material comprises at least one layer of honeycomb material with at least one layer of resin on the inside and at least one layer of resin on the outside.
  • the layer of honeycomb material is shaped by wrapping with an annular section.
  • one of the flanges and the inner and outer walls of the sleeve chamber came simultaneously from manufacturing.
  • FIG. 1 reference is made to 10 the support cylinder and 12 to the plate-holding sleeve.
  • the support cylinder comprises, in known manner, axes 14 allowing it to be mounted in a flexographic printing machine.
  • It includes an outer face 16 on which the sleeve is mounted, coaxially.
  • the sleeve comprises two walls, one 18, exterior and the other 20, interior.
  • Two flanges 22 and 24 are also arranged at the ends of this sleeve, between the outer and inner walls so as to delimit an annular chamber 26.
  • One of the flanges in this case, the flange 22, is equipped with a valve 28 for supplying fluid.
  • the outer wall 18 comprises, considered concentrically, an inner face 30 and an outer face 32.
  • the interior wall 20 includes an exterior face 34 and an interior face 36.
  • the internal wall being arranged coaxially with the support cylinder, the internal face is opposite and even in contact with the external face of the support cylinder.
  • This wall is made of a material having elastic qualities which allow a certain expansion and / or a certain radial retraction, of the order of a few hundredths of a millimeter to give an order of magnitude.
  • the internal wall 20 of the sleeve has a larger nominal diameter than that of the support cylinder 10.
  • the inner wall of the sleeve is pressed against the support cylinder by its inner face, which causes sufficient friction forces to ensure perfect immobilization of the sleeve on the support cylinder.
  • FIGS. 2A and 2B an alternative embodiment is shown, which uses the vacuum during assembly.
  • the difference essentially consists in that the inner wall of the sleeve has, this time, an inner diameter smaller than that of the plate cylinder, except in line with the flanges, and the fluid is in fact a vacuum connection which makes it possible to put in depression inside the chamber 26.
  • the sleeve chamber is placed under vacuum so that the inside diameter of the sleeve is greater than the diameter of the support cylinder, then the sleeve is introduced coaxially around this cylinder.
  • the vacuum is broken in the chamber, which has the effect of allowing the interior wall to resume its nominal interior diameter which is smaller than that of the cylinder, the difference being order of a few hundredths of a millimeter, which consequently generates forces for pressing the sleeve onto the cylinder, thus avoiding any rotation of the sleeve relative to the cylinder
  • the difference is located to the right of the chamber 26 which comprises, as shown in these Figures 3A and 3B, a casing 38, which is connected to the valve 28 for pressurization.
  • the interior wall 20, elastically deformable, has a nominal interior diameter greater than that of the cylinder as in the example shown in FIGS. 1A and 1B.
  • the outer face of the outer wall is designed to receive a plate and a means of fixing this plate on this face consists of having sizes 40, that is to say a set of points 42 which, in this mode of embodiment, are retractable, along an external generator of the sleeve.
  • the sizes include a connecting bar 44, arranged in the chamber 26 and more particularly between the casing 38 and the inner face 30 of the outer wall.
  • Springs 46 in this embodiment, leaf springs, are interposed between the casing 38 and the inner face 30 of the outer wall.
  • the tips 42 pass through through holes made in the outer wall 18.
  • a groove is machined in the flanges so as to guide the ends of the bar 44 of the sizes 40.
  • the grooves avoid too large a retraction in amplitude which could lead to an exit of the points out of the holes which serve as a guide.
  • Figure 5 shows schematically a set of four sleeves a , b , c and d arranged on the same support cylinder by means of the mounting device according to the invention.
  • the invention also relates to a sleeve suitable for this type of mounting and more particularly a composite sleeve.
  • the elasticity of the inner wall 20 must be very low since it is only a few hundredths of a millimeter of play to allow coaxial mounting of the sleeve on a cylinder, the surfaces being rectified.
  • the present invention proposes to produce a monolithic sleeve by wrapping at least one layer of honeycomb material with a binding polymer on a mandrel 47, mechanically expandable to ensure the withdrawal of the part, the outside diameter of which expanded is exactly that of a support cylinder intended to receive the sleeve.
  • the polymer is studied to cause a withdrawal of the sleeve of the order of a few hundredths of a millimeter after polymerization.
  • the sleeve can expand in the elastic range of these few hundredths when it is subjected to radial pressure.
  • the sleeve is produced in a single piece which includes one of the two flanges, in this case the flange 24, as well as the two outer 18 and inner 20 walls.
  • the inner wall 20, which must have a certain elasticity, has a thickness less than that of the outer wall 18 which requires great rigidity.
  • the dies 48 and 50 are represented in a complementary manner.
  • Such a layer of a conductive coating can be deposited by electrolysis.
  • Such sleeves can be used in heliography on suitable machines, in particular for applications where the quality of printing is paramount, this is the case with bar codes.
  • Such machines generally include an ink roller, operating by dipping, pressed against the printing roller, a scraper ensuring the removal of the excess ink.
  • the sleeve according to the invention can be mounted on support cylinders for two different applications, flexography and rotogravure.

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  • Printing Plates And Materials Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)

Abstract

The assembly consists of two flanges (22,24) on the ends of a rigid supporting cylinder (10) and a roller with an outer wall (18) to support a print stereotype and an inner wall which is elastically deformable for at least part of its length to engage with the outer surface of the cylinder. The two walls (18,20) of the roller form an inner sealed chamber (26) which is connected through a valve (28) to a fluid source which is used to deform the inner wall and fix it to the cylinder. In a variant of the design the roller can have an inflatable envelope inside the sealed chamber. The roller itself is made from a composition material having at least one honeycomb layer and inner/outer resin layers. It can be made, for example, from resin containing glass, carbon or Kevlar (RTM) fibres. <IMAGE>

Description

La présente invention a pour objet un dispositif de montage de manchons d'impression sur des cylindres de machines d'impression flexographique.The present invention relates to a device for mounting printing sleeves on cylinders of flexographic printing machines.

On connaît des machines d'impression flexographique qui comprennent soit des cylindres sur lesquels sont directement fixés les clichés d'impression, par exemple avec des adhésifs double-face, soit des cylindres support sur lesquels sont disposés des manchons porte-clichés, disposés coaxialement au cylindre support et prévus pour recevoir des clichés d'impression.Flexographic printing machines are known which comprise either cylinders on which the printing plates are directly fixed, for example with double-sided adhesives, or support cylinders on which are arranged plate sleeves, arranged coaxially with the support cylinder and designed to receive printing plates.

Si la solution des manchons est séduisante, elle pose néanmoins des problèmes importants lors de la mise en place sur les cylindres support.If the solution of the sleeves is attractive, it nevertheless poses significant problems during the positioning on the support cylinders.

En effet, il faut un ajustement très serré pour interdire tout glissement du manchon par rapport au cylindre support lors de l'utilisation après mise en place sur la machine d'impression, car les vitesses d'entraînement en rotation de ces cylindres sont importantes, si bien que cette nécessité d'ajustement rend très délicat le montage de tels manchons.Indeed, a very tight adjustment is necessary to prevent any sliding of the sleeve relative to the support cylinder during use after installation on the printing machine, because the rotational drive speeds of these cylinders are high, so much so that this need for adjustment makes it very difficult to mount such sleeves.

On a cherché à résoudre ce problème de montage et le brevet US-A-3.146.709 décrit un procédé de montage qui prévoit de mettre en surpression à l'aide d'un fluide l'intérieur du cylindre porte-manchon qui forme une chambre.Attempts have been made to resolve this mounting problem and US Pat. No. 3,146,709 describes an mounting method which provides for the pressurization of the interior of the sleeve-carrying cylinder which forms a chamber with the aid of a fluid. .

Ce cylindre porte-manchon est muni, à sa périphérie, de trous débouchants, ce qui crée un matelas d'air dès que le manchon commence à être suffisamment enfilé, devant ainsi faciliter le montage de ce manchon.This sleeve-carrying cylinder is provided, at its periphery, with through holes, which creates an air mattress as soon as the sleeve begins to be sufficiently threaded, thus facilitating the mounting of this sleeve.

Il se trouve que ce procédé n'est applicable qu'aux cylindres support qui peuvent ou qui sont équipés de trous mais ceci est inapplicable pour les cylindres pleins par exemple.It turns out that this method is only applicable to support cylinders which can or which are provided with holes, but this is inapplicable for full cylinders for example.

D'autres procédés et dispositifs prévoient, comme dans la demande de brevet français, FR-A-2.386.416, que les cylindres et manchons ont des sections circulaires mais avec des diamètres variables suivant l'axe longitudinal de ces cylindres et de ces manchons de façon à réaliser des éléments de révolution dont les profils coniques facilitent les emboîtements.Other methods and devices provide, as in the French patent application, FR-A-2,386,416, that the cylinders and sleeves have circular sections but with diameters varying along the longitudinal axis of these cylinders and these sleeves so as to produce elements of revolution whose conical profiles facilitate interlocking.

De telles solutions restent complexes en fabrication et pour le moins, d'un prix de revient très élevé.Such solutions remain complex in manufacturing and at the very least, of a very high cost price.

La présente invention vise à pallier les inconvénients de l'art antérieur ainsi qu'il vient d'être résumé, en permettant de monter des manchons de façon relativement aisée, en autorisant un montage y compris sur les cylindres pleins ou qui ne sont pas équipés de trous de passage d'air, en prévoyant différentes variantes pour des applications à des machines d'impression flexographique dont les caractéristiques mécaniques sont variables, en conduisant à la fabrication de produits ayant un prix de revient inférieur à ceux de l'art antérieur, et en prévoyant le recours à des matériaux actuels, notamment les matériaux composites, afin de réaliser, en plus des autres avantages, des économies de poids.The present invention aims to overcome the drawbacks of the prior art as just summarized, by allowing the sleeves to be mounted relatively easily, by allowing mounting even on cylinders which are full or which are not equipped. air passage holes, by providing different variants for applications to flexographic printing machines whose mechanical characteristics are variable, leading to the manufacture of products having a lower cost price than those of the prior art, and by providing for the use of current materials, in particular composite materials, in order to achieve, in addition to the other advantages, weight savings.

A cet effet, le dispositif de montage d'un manchon d'impression flexographique sur un cylindre support selon l'invention, comprend deux flasques disposés aux extrémités d'un cylindre rigide annulaire avec une paroi extérieure et une paroi intérieure, étudiées pour être coaxiales au cylindre support, dont la face externe de la paroi extérieure est prévue pour supporter un cliché d'impression et dont la paroi intérieure est composée d'une paroi déformable élastiquement et radialement, sur au moins une partie de sa longueur, la face intérieure de cette paroi intérieure étant disposée en regard de la face externe du cylindre support, paroi intérieure qui forme avec la paroi extérieure une chambre hermétique, reliée par une vanne à une source de fluide, de façon à déformer la paroi déformable élastiquement et à plaquer celle-ci sur la face externe du cylindre support.To this end, the device for mounting a flexographic printing sleeve on a support cylinder according to the invention comprises two flanges disposed at the ends of a rigid annular cylinder with an outer wall and an inner wall, designed to be coaxial to the support cylinder, the external face of the external wall of which is designed to support a printing plate and the internal wall of which is composed of an elastically and radially deformable wall, over at least part of its length, the internal face of this internal wall being arranged opposite the external face of the support cylinder, inner wall which forms with the outer wall a sealed chamber, connected by a valve to a source of fluid, so as to deform the elastically deformable wall and to press it on the outer face of the support cylinder.

Selon un mode de réalisation particulier de l'invention, la paroi déformable élastiquement a un diamètre intérieur nominal supérieur à celui du diamètre extérieur du cylindre support et le fluide introduit dans la chambre, après montage est à une pression supérieure à celle de la pression atmosphériqueAccording to a particular embodiment of the invention, the elastically deformable wall has a nominal internal diameter greater than that of the external diameter of the support cylinder and the fluid introduced into the chamber, after assembly is at a pressure greater than that of atmospheric pressure

Selon une variante de ce mode de réalisation, le manchon comprend une enveloppe gonflable, disposée dans la chambre hermétique, équipée d'une embout de connexion fluide de façon à permettre son gonflement.According to a variant of this embodiment, the sleeve comprises an inflatable envelope, arranged in the hermetic chamber, equipped with a fluid connection endpiece so as to allow it to swell.

Un perfectionnement de l'invention prévoit de disposer une barre équipée de pointures, disposée entre l'enveloppe et la face intérieure de la paroi extérieure du manchon.An improvement of the invention provides for having a bar equipped with sizes, arranged between the envelope and the inner face of the outer wall of the sleeve.

Selon un autre mode de réalisation de l'invention, la paroi déformable élastiquement a un diamètre intérieur nominal inférieur à celui du diamètre extérieur du cylindre support et le fluide introduit dans la chambre, avant montage, est à une pression inférieure à celle de la pression atmosphérique.According to another embodiment of the invention, the elastically deformable wall has a nominal internal diameter less than that of the external diameter of the support cylinder and the fluid introduced into the chamber, before assembly, is at a pressure lower than that of the pressure atmospheric.

L'invention a également pour objet un manchon pour la mise en oeuvre du dispositif et ce manchon est réalisé en matériau composite.The invention also relates to a sleeve for the implementation of the device and this sleeve is made of composite material.

Ce matériau composite comprend au moins une couche de matériau en nid d'abeilles avec au moins une couche de résine sur la face intérieure et au moins une couche de résine sur la face extérieure.This composite material comprises at least one layer of honeycomb material with at least one layer of resin on the inside and at least one layer of resin on the outside.

Plus particulièrement, la couche de matériau en nid d'abeilles est conformée par banderolage avec une section annulaire.More particularly, the layer of honeycomb material is shaped by wrapping with an annular section.

De plus, pour réaliser un ensemble monolithique, l'un des flasques et les parois intérieure et extérieure de la chambre du manchon sont simultanément venus de fabrication.In addition, to produce a monolithic assembly, one of the flanges and the inner and outer walls of the sleeve chamber came simultaneously from manufacturing.

La présente invention est décrite ci-après selon un mode de réalisation particulier avec ses variantes, en regard des dessins annexés sur lesquels les figures suivantes représentent :

  • Figures 1A et 1B, une vue en coupe longitudinale d'un cylindre support et d'un manchon avec le dispositif de montage selon l'invention avec un fluide sous pression, respectivement dans la position de montage et dans la position de blocage sur le cylindre support après montage,
  • Figures 2A et 2B, une vue en coupe longitudinale d'un cylindre support et d'un manchon avec le dispositif de montage selon l'invention avec un fluide en dépression, respectivement dans la position de montage et dans la position de blocage sur le cylindre support après montage,
  • Figures 3A et 3B, une vue en coupe longitudinale d'un cylindre support et d'un manchon avec une variante du dispositif de montage selon l'invention avec un fluide en pression dans une enveloppe, respectivement dans la position de montage et dans la position de blocage sur le cylindre support après montage,
  • Figures 4A et 4B, une vue en coupe longitudinale d'un cylindre support et d'un manchon avec une enveloppe et équipé de pointures, respectivement dans la position de montage et dans la position de blocage sur le cylindre support après montage,
  • Figure 5, une variante de réalisation avec plusieurs manchons indépendants montés sur un même cylindre support,
  • Figures 6A et 6B, respectivement les étapes de fabrication d'un manchon selon l'invention, en matériau composite, autour d'une matrice, et
  • Figure 7, une vue en coupe transversale suivant la ligne 7-7 de la figure 4B.
The present invention is described below according to a particular embodiment with its variants, opposite attached drawings in which the following figures represent:
  • Figures 1A and 1B, a longitudinal sectional view of a support cylinder and a sleeve with the mounting device according to the invention with a pressurized fluid, respectively in the mounting position and in the locking position on the cylinder support after mounting,
  • Figures 2A and 2B, a longitudinal sectional view of a support cylinder and a sleeve with the mounting device according to the invention with a vacuum fluid, respectively in the mounting position and in the locking position on the cylinder support after mounting,
  • Figures 3A and 3B, a longitudinal sectional view of a support cylinder and a sleeve with a variant of the mounting device according to the invention with a fluid under pressure in an envelope, respectively in the mounting position and in the position blocking on the support cylinder after mounting,
  • FIGS. 4A and 4B, a view in longitudinal section of a support cylinder and of a sleeve with an envelope and fitted with sizes, respectively in the mounting position and in the locking position on the support cylinder after mounting,
  • FIG. 5, an alternative embodiment with several independent sleeves mounted on the same support cylinder,
  • FIGS. 6A and 6B, respectively the steps for manufacturing a sleeve according to the invention, in composite material, around a matrix, and
  • Figure 7, a cross-sectional view along line 7-7 of Figure 4B.

Pour la suite de la description, les termes "intérieur" et "extérieur" seront considérés concentriquement de la périphérie des cylindres vers leur ligne d'axe.For the remainder of the description, the terms "interior" and "exterior" will be considered concentrically from the periphery of the cylinders to their center line.

Sur la figure 1, on a référencé 10 le cylindre support et 12 le manchon porte-clichés.In FIG. 1, reference is made to 10 the support cylinder and 12 to the plate-holding sleeve.

Le cylindre support comprend de façon connue des axes 14 permettant son montage dans une machine d'impression flexographique.The support cylinder comprises, in known manner, axes 14 allowing it to be mounted in a flexographic printing machine.

Il comprend une face extérieure 16 sur laquelle est monté le manchon, coaxialement.It includes an outer face 16 on which the sleeve is mounted, coaxially.

Le manchon comprend deux parois l'une 18, extérieure et l'autre 20, intérieure.The sleeve comprises two walls, one 18, exterior and the other 20, interior.

Deux flasques 22 et 24 sont par ailleurs disposés aux extrémités de ce manchon, entre les paroi extérieure et intérieure de façon à délimiter une chambre 26, annulaire.Two flanges 22 and 24 are also arranged at the ends of this sleeve, between the outer and inner walls so as to delimit an annular chamber 26.

L'un des flasques, en l'occurrence, le flasque 22, est équipé d'une vanne 28 d'alimentation en fluide .One of the flanges, in this case, the flange 22, is equipped with a valve 28 for supplying fluid.

La paroi extérieure 18 comprend, considérée concentriquement, une face intérieure 30 et une face extérieure 32.The outer wall 18 comprises, considered concentrically, an inner face 30 and an outer face 32.

De façon symétrique, la paroi intérieure 20 comprend une face extérieure 34 et une face intérieure 36.Symmetrically, the interior wall 20 includes an exterior face 34 and an interior face 36.

La paroi intérieure étant disposée coaxialement au cylindre support, la face intérieure se trouve en vis à vis et même au contact de la face extérieure du cylindre support.The internal wall being arranged coaxially with the support cylinder, the internal face is opposite and even in contact with the external face of the support cylinder.

Cette paroi est réalisée en un matériau ayant des qualités élastiques qui autorisent une certaine expansion et/ou une certaine rétraction radiales, de l'ordre de quelques centièmes de millimètres pour donner un ordre de grandeur.This wall is made of a material having elastic qualities which allow a certain expansion and / or a certain radial retraction, of the order of a few hundredths of a millimeter to give an order of magnitude.

Sur la figure 1A, la paroi intérieure 20 du manchon a un diamètre nominal plus grand que celui du cylindre support 10.In FIG. 1A, the internal wall 20 of the sleeve has a larger nominal diameter than that of the support cylinder 10.

Le montage d'un tel manchon s'effectue aisément par emboîtement coaxial puisque le diamètre intérieur du manchon est supérieur à celui du cylindre support.The mounting of such a sleeve is easily carried out by coaxial interlocking since the internal diameter of the sleeve is greater than that of the support cylinder.

Par contre, un tel manchon peut tourner aisément autour du cylindre, ce qui est totalement incompatible avec les besoins de la profession.By cons, such a sleeve can easily rotate around the cylinder, which is completely incompatible with the needs of the profession.

Il faut donc l'immobiliser, ce qui est réalisé par mise en pression de la chambre 26 au moyen de la vanne 28.It must therefore be immobilized, which is achieved by pressurizing the chamber 26 by means of the valve 28.

Lorsque l'utilisateur souhaite retirer le manchon, il supprime la pression dans la chambre en mettant à l'air libre, par exemple.When the user wishes to remove the sleeve, it relieves the pressure in the chamber by venting, for example.

Dès lors, la paroi intérieure du manchon est plaquée sur le cylindre support par sa face intérieure, ce qui provoque des forces de frottement suffisantes pour assurer une parfaite immobilisation du manchon sur le cylindre support.Therefore, the inner wall of the sleeve is pressed against the support cylinder by its inner face, which causes sufficient friction forces to ensure perfect immobilization of the sleeve on the support cylinder.

Sur les figures 2A et 2B, on a représenté une variante de réalisation, qui utilise la dépression au montage.In FIGS. 2A and 2B, an alternative embodiment is shown, which uses the vacuum during assembly.

Les éléments identiques portent les mêmes références que précédemment, les variations dimensionnelles étant trop peu sensibles pour les représenter avec une échelle convenable.Identical elements have the same references as above, the dimensional variations being too insensitive to represent them with a suitable scale.

Néanmoins la différence consiste essentiellement en ce que la paroi intérieure du manchon a, cette fois, un diamètre intérieur inférieur à celui du cylindre porte-clichés, sauf au droit des flasques, et le fluide est en fait une prise de vide qui permet de mettre en dépression l'intérieur de la chambre 26.However, the difference essentially consists in that the inner wall of the sleeve has, this time, an inner diameter smaller than that of the plate cylinder, except in line with the flanges, and the fluid is in fact a vacuum connection which makes it possible to put in depression inside the chamber 26.

Le montage est dans ce cas réalisé de la façon suivante :In this case, the assembly is carried out as follows:

La chambre du manchon est mise en dépression pour que le diamètre intérieur du manchon soit supérieur au diamètre du cylindre support puis le manchon est introduit coaxialement autour de ce cylindre.The sleeve chamber is placed under vacuum so that the inside diameter of the sleeve is greater than the diameter of the support cylinder, then the sleeve is introduced coaxially around this cylinder.

Lorsque le manchon est positionné sur le cylindre support, le vide est cassé dans la chambre, ce qui a pour effet de permettre à la paroi intérieure de reprendre son diamètre intérieur nominal qui est plus petit que celui du cylindre, la différence étant de l'ordre de quelques centièmes de millimètre, ce qui engendre par conséquent des forces de plaquage du manchon sur le cylindre, évitant ainsi toute rotation du manchon par rapport au cylindreWhen the sleeve is positioned on the support cylinder, the vacuum is broken in the chamber, which has the effect of allowing the interior wall to resume its nominal interior diameter which is smaller than that of the cylinder, the difference being order of a few hundredths of a millimeter, which consequently generates forces for pressing the sleeve onto the cylinder, thus avoiding any rotation of the sleeve relative to the cylinder

La variante représentée sur les figures 3A et 3B comporte les mêmes références pour les mêmes éléments que sur les figures 1A, 1B, 2A et 2B.The variant shown in Figures 3A and 3B has the same references for the same elements as in Figures 1A, 1B, 2A and 2B.

La différence se situe au droit de la chambre 26 qui comprend, ainsi que cela est représenté sur ces figures 3A et 3B, une enveloppe 38, qui est reliée à la vanne 28 de mise en pression.The difference is located to the right of the chamber 26 which comprises, as shown in these Figures 3A and 3B, a casing 38, which is connected to the valve 28 for pressurization.

La paroi intérieure 20, déformable élastiquement, a un diamètre intérieur nominal supérieur à celui du cylindre comme dans l'exemple représenté sur les figures 1A et 1B.The interior wall 20, elastically deformable, has a nominal interior diameter greater than that of the cylinder as in the example shown in FIGS. 1A and 1B.

Lorsque le fluide sous pression est introduit dans l'enveloppe, celle-ci se gonfle et prend appui sur la face extérieure de la paroi intérieure ce qui plaque le manchon contre le cylindre, évitant ainsi toute rotation intempestive du manchon par rapport au cylindre.When the pressurized fluid is introduced into the envelope, the latter swells and bears on the external face of the internal wall, which presses the sleeve against the cylinder, thus avoiding any untimely rotation of the sleeve relative to the cylinder.

Cette variante avec une enveloppe gonflable trouve également une autre application dont une mode de réalisation est représenté, à titre d'exemple sur les figures 4A et 4B.This variant with an inflatable envelope also finds another application, an embodiment of which is shown, by way of example in FIGS. 4A and 4B.

En effet, la face extérieure de la paroi extérieure est prévue pour recevoir un cliché et un moyen de fixation de ce cliché sur cette face consiste à disposer des pointures 40, c'est à dire un ensemble de pointes 42 qui, dans ce mode de réalisation, sont escamotables, suivant une génératrice extérieure du manchon.Indeed, the outer face of the outer wall is designed to receive a plate and a means of fixing this plate on this face consists of having sizes 40, that is to say a set of points 42 which, in this mode of embodiment, are retractable, along an external generator of the sleeve.

Ces pointures permettent de fixer l'une des extrémités du cliché comme cela est représenté sur la coupe de la figure 7 et l'autre extrémité du cliché est maintenue de façon connue à l'aide d'un adhésif double-face, le cliché ayant une longueur inférieure au périmètre du manchon de façon à éviter toute superposition du cliché sur lui-même qui conduit à une surépaisseur.These sizes allow one of the ends of the plate to be fixed as shown in the section of FIG. 7 and the other end of the plate is held in known manner using a double-sided adhesive, the plate having a length less than the perimeter of the sleeve so as to avoid any superposition of the plate on itself which leads to an excess thickness.

Ainsi que cela est représenté sur les figures 4A et 4B, les pointures comprennent une barre de liaison 44, disposée dans la chambre 26 et plus particulièrement entre l'enveloppe 38 et la face intérieure 30 de la paroi extérieure.As shown in Figures 4A and 4B, the sizes include a connecting bar 44, arranged in the chamber 26 and more particularly between the casing 38 and the inner face 30 of the outer wall.

Des ressorts 46, dans ce mode de réalisation, des ressorts à lames, sont interposés entre l'enveloppe 38 et la face intérieure 30 de la paroi extérieure.Springs 46, in this embodiment, leaf springs, are interposed between the casing 38 and the inner face 30 of the outer wall.

Les pointes 42 passent à travers des trous débouchants ménagés dans la paroi extérieure 18.The tips 42 pass through through holes made in the outer wall 18.

Une rainure est usinée dans les flasques de façon à assurer un guidage des extrémités de la barre 44 des pointures 40.A groove is machined in the flanges so as to guide the ends of the bar 44 of the sizes 40.

On constate que les pointures font saillie à travers la paroi extérieure dès que l'enveloppe 38 est mise en pression.We see that the sizes protrude through the outer wall as soon as the envelope 38 is pressurized.

Lorsque l'utilisateur souhaite un escamotage des pointures, il lui suffit de supprimer la mise en pression de l'enveloppe et la barre, soumise à l'action des ressorts, s'escamote.When the user wishes a retraction of the sizes, it suffices for him to remove the pressurization of the envelope and the bar, subjected to the action of the springs, retracts.

Les rainures, de longueur limitée, évitent un escamotage trop important en amplitude qui pourrait conduire à une sortie des pointes hors des trous qui servent de guidage.The grooves, of limited length, avoid too large a retraction in amplitude which could lead to an exit of the points out of the holes which serve as a guide.

La figure 5 montre de façon schématique un ensemble de quatre manchons a, b, c et d disposés sur un même cylindre support grâce au dispositif de montage selon l'invention.Figure 5 shows schematically a set of four sleeves a , b , c and d arranged on the same support cylinder by means of the mounting device according to the invention.

Les éléments identiques portent les mêmes références.Identical elements have the same references.

L'invention a également pour objet un manchon adapté à ce type de montage et plus particulièrement un manchon composite.The invention also relates to a sleeve suitable for this type of mounting and more particularly a composite sleeve.

En effet, l'élasticité de la paroi intérieure 20 doit être très faible puisqu'il suffit de quelques centièmes de millimètres de jeu pour permettre un montage coaxial du manchon sur un cylindre, les surfaces étant rectifiées.Indeed, the elasticity of the inner wall 20 must be very low since it is only a few hundredths of a millimeter of play to allow coaxial mounting of the sleeve on a cylinder, the surfaces being rectified.

Aussi, la présente invention propose de réaliser un manchon monolithique par banderolage d'au moins une couche de matériau en nid d'abeilles avec un polymère de liaison sur un mandrin 47, expansible mécaniquement pour assurer le retrait de la pièce, dont le diamètre extérieur expansé est exactement celui d'un cylindre support prévu pour recevoir le manchon.Also, the present invention proposes to produce a monolithic sleeve by wrapping at least one layer of honeycomb material with a binding polymer on a mandrel 47, mechanically expandable to ensure the withdrawal of the part, the outside diameter of which expanded is exactly that of a support cylinder intended to receive the sleeve.

Le polymère est étudié pour provoquer un retrait du manchon de l'ordre de quelques centièmes de millimètre après polymérisation.The polymer is studied to cause a withdrawal of the sleeve of the order of a few hundredths of a millimeter after polymerization.

Ainsi le manchon peut s'expanser dans le domaine élastique de ces quelques centièmes lorsqu'il est soumis à une pression radiale.Thus the sleeve can expand in the elastic range of these few hundredths when it is subjected to radial pressure.

Ainsi que cela est représenté sur la figure 6B, le manchon est réalisé en une seule pièce qui comprend un des deux flasques, en l'occurrence le flasque 24, ainsi que les deux parois extérieure 18 et intérieure 20.As shown in FIG. 6B, the sleeve is produced in a single piece which includes one of the two flanges, in this case the flange 24, as well as the two outer 18 and inner 20 walls.

La paroi intérieure 20, qui doit présenter une certaine élasticité, a une épaisseur inférieure à celle de la paroi extérieure 18 qui nécessite une grande rigidité.The inner wall 20, which must have a certain elasticity, has a thickness less than that of the outer wall 18 which requires great rigidity.

Sur la figure 6A, on a représenté de façon complémentaire les matrices 48 et 50.In FIG. 6A, the dies 48 and 50 are represented in a complementary manner.

Ce procédé et le produit obtenu font l'objet d'une demande de brevet connexe déposée au nom du même titulaire.This process and the product obtained are the subject of a related patent application filed in the name of the same owner.

Sur la figure 7, les éléments identiques portent les mêmes références que sur les figures précédentes.In FIG. 7, the identical elements have the same references as in the preceding figures.

Cette figure permet de mieux appréhender le montage coaxial des différents éléments et le positionnement de la barre 44 et des pointes 42.This figure provides a better understanding of the coaxial mounting of the different elements and the positioning of the bar 44 and the tips 42.

D'autres types de matériaux pourront être utilisés pour réaliser notamment les parois du manchon, c'est ainsi que l'on aura recours à des tissus de verre, de carbone et de "Kevlar" noyés dans une matrice de résine.Other types of material could be used to produce in particular the walls of the sleeve, this is how we will use glass, carbon and "Kevlar" fabrics embedded in a resin matrix.

Selon une autre variante de l'invention, il est prévu de rapporter une couche conductrice à la périphérie du manchon, cette couche pouvant être gravée.According to another variant of the invention, provision is made to attach a conductive layer to the periphery of the sleeve, this layer possibly being etched.

Une telle couche d'un revêtement conducteur peut être déposée par électrolyse.Such a layer of a conductive coating can be deposited by electrolysis.

Ainsi de tels manchons peuvent être utilisés en héliographie sur des machines adaptées, notamment pour des applications où la qualité d'impression est primordiale, c'est le cas des codes-barres.Thus, such sleeves can be used in heliography on suitable machines, in particular for applications where the quality of printing is paramount, this is the case with bar codes.

De telles machines comprennent généralement un rouleau encreur, fonctionnant au trempage, plaqué contre le rouleau d'impression, un râcleur assurant le retrait de l'encre en excès.Such machines generally include an ink roller, operating by dipping, pressed against the printing roller, a scraper ensuring the removal of the excess ink.

On remarque donc que le manchon selon l'invention peut être monté sur des cylindres support pour deux applications différentes, la flexographie et l'héliographie.It is therefore noted that the sleeve according to the invention can be mounted on support cylinders for two different applications, flexography and rotogravure.

Claims (9)

Dispositif de montage d'un manchon (12) d'impression flexographique sur un cylindre support (10), caractérisé en ce qu'il comprend deux flasques (22, 24) disposés aux extrémités d'un cylindre rigide annulaire avec une paroi extérieure (18) et une paroi intérieure (20), étudiées pour être coaxiales au cylindre support, dont la face extérieure (32) de la paroi extérieure (18) est prévue pour supporter un cliché d'impression et dont la paroi intérieure (20) est composée d'une paroi déformable élastiquement et radialement, sur au moins une partie de sa longueur, la face intérieure (36) de cette paroi intérieure étant disposée en regard de la face extérieure (16) du cylindre support (10), paroi intérieure qui forme avec la paroi extérieure une chambre hermétique (26), reliée par une vanne (28) à une source de fluide, de façon à déformer la paroi déformable élastiquement et à plaquer celle-ci sur la face extérieure du cylindre support.Device for mounting a flexographic printing sleeve (12) on a support cylinder (10), characterized in that it comprises two flanges (22, 24) disposed at the ends of a rigid annular cylinder with an outer wall ( 18) and an inner wall (20), designed to be coaxial with the support cylinder, the outer face (32) of the outer wall (18) is provided to support a printing plate and the inner wall (20) is composed of an elastically and radially deformable wall, over at least part of its length, the internal face (36) of this internal wall being arranged opposite the external face (16) of the support cylinder (10), internal wall which forms with the outer wall a sealed chamber (26), connected by a valve (28) to a source of fluid, so as to deform the elastically deformable wall and to press it on the outer face of the support cylinder. Dispositif de montage selon la revendication 1, caractérisé en ce que la paroi (20) déformable élastiquement a un diamètre intérieur nominal supérieur à celui du diamètre extérieur du cylindre support (10) et en ce que le fluide introduit dans la chambre, après montage est à une pression supérieure à celle de la pression atmosphérique.Mounting device according to claim 1, characterized in that the elastically deformable wall (20) has a nominal inside diameter greater than that of the outside diameter of the support cylinder (10) and in that the fluid introduced into the chamber, after mounting is at a pressure higher than that of atmospheric pressure. Dispositif de montage selon la revendication 2, caractérisé en ce que le manchon (12) comprend une enveloppe (38) gonflable, disposée dans la chambre (26) hermétique, équipée d'un embout de connexion fluide de façon à permettre son expansion dans la chambre.Mounting device according to claim 2, characterized in that the sleeve (12) comprises an inflatable envelope (38), disposed in the sealed chamber (26), equipped with a fluid connection endpiece so as to allow its expansion in the bedroom. Dispositif de montage selon la revendication 2 ou 3, caractérisé en ce que le manchon (12) comprend une barre (44) équipée de pointures (40).Mounting device according to claim 2 or 3, characterized in that the sleeve (12) comprises a bar (44) equipped with sizes (40). Dispositif de montage selon la revendication 1, caractérisé en ce que la paroi (20) déformable élastiquement a un diamètre intérieur nominal inférieur à celui du diamètre extérieur du cylindre support (10) et en ce que le fluide introduit dans la chambre, avant montage est à une pression inférieure à celle de la pression atmosphérique.Mounting device according to claim 1, characterized in that the elastically deformable wall (20) has a nominal internal diameter smaller than that of the external diameter of the support cylinder (10) and in that the fluid introduced into the chamber, before mounting is at a pressure lower than that of atmospheric pressure. Manchon pour la mise en oeuvre du dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est réalisé en matériau composite.Sleeve for implementing the device according to any one of the preceding claims, characterized in that it is made of composite material. Manchon selon la revendication 6, caractérisé en ce que le matériau composite comprend au moins une couche de matériau cellulaire en nid d'abeilles avec au moins une couche de résine sur la face intérieure et au moins une couche sur la face extérieure.Sleeve according to claim 6, characterized in that the composite material comprises at least one layer of cellular honeycomb material with at least one layer of resin on the inside and at least one layer on the outside. Manchon selon la revendication 7, caractérisé en ce que la couche de matériau en nid d'abeilles est conformée par banderolage avec une section annulaire.Sleeve according to claim 7, characterized in that the layer of honeycomb material is shaped by wrapping with an annular section. Manchon selon l'une quelconque des revendications 6 à 8, caractérisé en ce que l'un des flasques et les parois intérieure et extérieure de la chambre du manchon sont venus de fabrication simultanément pour réaliser un ensemble monolithique.Sleeve according to any one of claims 6 to 8, characterized in that one of the flanges and the inner and outer walls of the sleeve chamber have come from manufacturing simultaneously to produce a monolithic assembly.
EP95450008A 1994-05-19 1995-05-18 Sleeve for mounting on support cylinders in flexographic machines Expired - Lifetime EP0683046B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406416A FR2720030B1 (en) 1994-05-19 1994-05-19 Device for mounting printing sleeves on cylinders supporting flexographic machines.
FR9406416 1994-05-19

Publications (2)

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EP0683046A1 true EP0683046A1 (en) 1995-11-22
EP0683046B1 EP0683046B1 (en) 1999-08-18

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EP95450008A Expired - Lifetime EP0683046B1 (en) 1994-05-19 1995-05-18 Sleeve for mounting on support cylinders in flexographic machines

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EP (1) EP0683046B1 (en)
AT (1) ATE183445T1 (en)
DE (1) DE69511454T2 (en)
ES (1) ES2138174T3 (en)
FR (1) FR2720030B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742379A1 (en) * 1995-12-14 1997-06-20 Komori Chambon Cylindrical driving shaft sleeve holder, esp. for printing machine
US6740530B1 (en) 2000-11-22 2004-05-25 Xerox Corporation Testing method and configurations for multi-ejector system
EP2093058A1 (en) * 2008-02-20 2009-08-26 Spilker GmbH Exchangeable print roller
EP2398646A4 (en) * 2009-02-17 2012-10-31 Luminite Prod Corp PRINT SLEEVE
US10843457B2 (en) * 2017-11-13 2020-11-24 Rossini Spain Printing Rollers SAU Adapting sleeve with hydraulic pads for a flexographic printing machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004004375U1 (en) 2004-03-18 2004-10-28 Polywest Kunststofftechnik Saueressig & Partner Gmbh & Co. Kg Sleeve for printing machines
DE102004013552A1 (en) * 2004-03-19 2005-10-06 Goss International Montataire S.A. Lifting sleeve for a cylinder in a printing machine

Citations (6)

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Publication number Priority date Publication date Assignee Title
US2621867A (en) * 1950-02-10 1952-12-16 Karl E L Grettve Expansible mandrel
US2801694A (en) * 1955-12-06 1957-08-06 Jagenberg Werke Ag Fastening means for roll cutting machine assembly
FR1369471A (en) * 1963-07-02 1964-08-14 Wean Damiron Mandrel expandable by expandable chamber
US3146709A (en) 1962-04-09 1964-09-01 West Essex Printing Plate Inc Method and apparatus for mounting printing sleeves
US3510082A (en) * 1967-11-24 1970-05-05 Arthur T Williams Pneumatic chuck
FR2386416A1 (en) 1977-04-04 1978-11-03 Strachan & Henshaw Ltd Printing sleeve positioning system - is on tapered hub and expands by internal gas pressure to slide to final position

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2621867A (en) * 1950-02-10 1952-12-16 Karl E L Grettve Expansible mandrel
US2801694A (en) * 1955-12-06 1957-08-06 Jagenberg Werke Ag Fastening means for roll cutting machine assembly
US3146709A (en) 1962-04-09 1964-09-01 West Essex Printing Plate Inc Method and apparatus for mounting printing sleeves
FR1369471A (en) * 1963-07-02 1964-08-14 Wean Damiron Mandrel expandable by expandable chamber
US3510082A (en) * 1967-11-24 1970-05-05 Arthur T Williams Pneumatic chuck
FR2386416A1 (en) 1977-04-04 1978-11-03 Strachan & Henshaw Ltd Printing sleeve positioning system - is on tapered hub and expands by internal gas pressure to slide to final position

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742379A1 (en) * 1995-12-14 1997-06-20 Komori Chambon Cylindrical driving shaft sleeve holder, esp. for printing machine
US6740530B1 (en) 2000-11-22 2004-05-25 Xerox Corporation Testing method and configurations for multi-ejector system
EP2093058A1 (en) * 2008-02-20 2009-08-26 Spilker GmbH Exchangeable print roller
EP2398646A4 (en) * 2009-02-17 2012-10-31 Luminite Prod Corp PRINT SLEEVE
US10843457B2 (en) * 2017-11-13 2020-11-24 Rossini Spain Printing Rollers SAU Adapting sleeve with hydraulic pads for a flexographic printing machine

Also Published As

Publication number Publication date
EP0683046B1 (en) 1999-08-18
DE69511454T2 (en) 2000-08-03
FR2720030A1 (en) 1995-11-24
ES2138174T3 (en) 2000-01-01
FR2720030B1 (en) 1996-08-09
ATE183445T1 (en) 1999-09-15
DE69511454D1 (en) 1999-09-23

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