EP1375145A2 - Compensation sleeve for the flexographic printing - Google Patents
Compensation sleeve for the flexographic printing Download PDFInfo
- Publication number
- EP1375145A2 EP1375145A2 EP03356096A EP03356096A EP1375145A2 EP 1375145 A2 EP1375145 A2 EP 1375145A2 EP 03356096 A EP03356096 A EP 03356096A EP 03356096 A EP03356096 A EP 03356096A EP 1375145 A2 EP1375145 A2 EP 1375145A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compensating sleeve
- elastomeric material
- face
- shore
- carrier
- 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.)
- Withdrawn
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- 238000007639 printing Methods 0.000 title claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000013536 elastomeric material Substances 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000009713 electroplating Methods 0.000 claims description 9
- 238000007647 flexography Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 19
- 229920001971 elastomer Polymers 0.000 abstract description 9
- 239000000806 elastomer Substances 0.000 abstract description 7
- 229920001875 Ebonite Polymers 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 20
- 229920002635 polyurethane Polymers 0.000 description 9
- 239000004814 polyurethane Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 4
- -1 polyéthylène Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 241001639412 Verres Species 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005323 electroforming Methods 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 241000195940 Bryophyta Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 235000011929 mousse Nutrition 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
Definitions
- a compensating sleeve is suitable specifically to compensate for the dimensional difference between a carrier rotational drive and a printer shape with the outer face forms a flexographic plate.
- a compensating sleeve must be distinguished, on the one hand, a flexographic printing sleeve, generally consisting of a metal or composite base, coated with a photopolymer or rubber, and on the other hand a transfer sleeve, or blanket, consisting usually a metal base coated with rubber.
- a print compensating sleeve by flexography is a component of relatively large size and weight, having various mechanical characteristics relatively antagonistic, with particularly internal and external dimensions accurate.
- the compensating sleeve On one side, that is to say on the side of its cylindrical inner face, the compensating sleeve is centrifugally deformed or expanded but limited, over a short period, under the effect of a gas cushion under pressure (for example compressed air between 5 and 8 bars of pressure), and this to be removed from the wearer, then set up on or extracted by sliding of said carrier, as the case may be.
- a gas cushion under pressure for example compressed air between 5 and 8 bars of pressure
- the sleeve should have sufficient centripetal elasticity to return to the tight position against the wearer's cylindrical outer surface, once the stress centrifugal stops.
- the sleeve compensator In the tight position against the wearer, the sleeve compensator must maintain, almost permanently, stability dimensional, in particular as regards its internal section, so as to avoid, during printing, any relative sliding in rotation between the carrier and the compensating sleeve. And these characteristics of radial elasticity and dimensional stability must remain as long as possible, notwithstanding a significant number of assemblies / disassemblies compared to the carrier.
- the compensating sleeve On the other side, i.e. on the side of its outer face cylindrical, the compensating sleeve must remain relatively hard, of a part, given its rotational support against the medium to be printed (paper, cardboard, plastic, etc.) during the flexographic printing process, and on the other hand to preserve at its nominal value the outside diameter of the compensating sleeve, for controlled flexographic printing.
- This hardness of the outer face also allows its polishing, for perfect adhesion of the printer form.
- the compensating sleeve presents an almost perfect volume homogeneity, to avoid any "imbalance" during its rotation at high speed, vibration generator degrading the quality of flexographic printing.
- a sleeve composite can only be a composite part.
- the material of the first tube in this case a fabric glass fibers impregnated with a resin, does not allow to reconcile, in the duration, centrifugal radial elasticity and centripetal tightening stability.
- the aforementioned material gradually releases its initial constraints, originally allowing it to ensure a good tightening; a relaxation centrifugal therefore occurs after a certain number of cycles assembly / disassembly / printing.
- This material and more particularly the resin which permeates it, have a glass transition temperature, that is to say a transition from the glassy state in the rubbery state, between 60 and 150 ° C. Therefore, during the process of manufacture of the continuous printer form, in the form of a sleeve, in photopolymer material previously fixed on the compensating sleeve, the latter undergoes, during the polymerization of the photopolymer constituting the printer form, a relatively large temperature rise, by example between 110 ° C and 140 ° C for 30 min, exceeding this glass transition temperature, above which stability dimension of the material of the first tube is no longer guaranteed. Therefore, in returning to room temperature, this material no longer has its original dimensions, which in particular compromises its clamping capacity.
- the object of the present invention is to remedy the drawbacks previously identified.
- the subject of the invention is, in the context of a printing process by flexography, a construction compensating cylinder particularly simple, presenting over time, and dimensional stability of its internal and external sections, and a centripetal radial elasticity at the level of its cylindrical inner face, remaining compatible with this stability dimensional.
- nickel-based is meant that the nickel constituting the internal base, in majority quantity, can be alloyed, in minority quantity, with one or more metals, or even other non-metallic elements, therefore that all nickel and / or other metals can be deposited on any suitable support by electrolysis or electroplating.
- the relatively hard outer layer of the compensating sleeve is not found subject to no significant deformation, thanks to the interlayer relatively soft, notwithstanding the centrifugal radial deformations, elastic, internal base.
- the relatively hard outer layer is found to exert a limited pressure on the internal base, through the layer relatively soft intermediate, during the phases of dilation of the base internal, helping the latter to keep a constant tightening on the carrier.
- the invention only with the intermediate base to base of nickel, and moreover under a small thickness, it is possible to reconcile, at the level of the inner face of the compensating sleeve, and radial elasticity centrifugal and centripetal dimensional stability. This results in particular from the fact that the nickel obtained by electroplating, at low thickness, has a three-dimensional, face-centered cubic crystal structure with homogeneity, cohesion and elasticity.
- the surface finish, perfectly smooth inside the base metallic nickel significantly promotes cushion spread air required for mounting / dismounting the base on the carrier. This allows therefore to limit this air stream in thickness, which correspondingly reduces the expansion of the base.
- the inner diameter may be an exact reflection of the geometry of the outer surface cylindrical of the carrier.
- the interior surface finish of the base and the thickness of the deposit are therefore almost perfect, which avoids any subsequent rectification.
- nickel is a perfectly recyclable material, which allows to recover the manufacturing scraps of the base.
- FIG. 1 represents an exploded view, to scale enlarged, of a carrier / compensating sleeve / printer assembly, according to the present invention.
- the compensating sleeve (3) is made up only by the internal tubular base (5), the external layer (6) of the material hard elastomer, and the intermediate layer (7) of the soft elastomer material, bonded to each other.
- the difference in hardness between the material hard elastomer and the soft elastomer material is at least 30 Shore D.
Landscapes
- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
Description
La présente invention concerne un procédé d'impression par
flexographie selon lequel, de manière générale :
Par conséquent, un manchon compensateur est adapté spécifiquement pour compenser l'écart dimensionnel existant entre un porteur d'entraínement en rotation et une forme imprimante dont la face extérieure forme un cliché flexographique. Un manchon compensateur doit être distingué, d'une part d'un manchon d'impression flexographique, constitué en général par une base métallique ou en matériau composite, revêtue d'un photopolymère ou caoutchouc, et d'autre part d'un manchon de transfert, ou blanchet, constitué généralement d'une base métallique revêtue de caoutchouc.Therefore, a compensating sleeve is suitable specifically to compensate for the dimensional difference between a carrier rotational drive and a printer shape with the outer face forms a flexographic plate. A compensating sleeve must be distinguished, on the one hand, a flexographic printing sleeve, generally consisting of a metal or composite base, coated with a photopolymer or rubber, and on the other hand a transfer sleeve, or blanket, consisting usually a metal base coated with rubber.
Aujourd'hui, un manchon compensateur d'impression par flexographie constitue un composant de taille et poids relativement importants, devant présenter diverses caractéristiques mécaniques relativement antagonistes, avec des dimensions intérieures et extérieures particulièrement précises.Today, a print compensating sleeve by flexography is a component of relatively large size and weight, having various mechanical characteristics relatively antagonistic, with particularly internal and external dimensions accurate.
D'un côté, c'est-à-dire du côté de sa face intérieure cylindrique, le manchon compensateur est déformé ou dilaté de manière centrifuge mais limitée, sur une courte durée, sous l'effet d'un coussin gazeux sous pression (par exemple de l'air comprimé entre 5 et 8 bars de pression), et ce pour être écarté du porteur, puis mis en place sur ou extrait par coulissement dudit porteur, selon le cas. Néanmoins, le manchon doit présenter une élasticité centripète suffisante pour revenir en position serrée contre la portée extérieure cylindrique du porteur, une fois que la sollicitation centrifuge cesse. En position serrée contre le porteur, le manchon compensateur doit conserver, de façon quasi permanente, une stabilité dimensionnelle, en particulier quant à sa section intérieure, de manière à éviter, lors de l'impression, tout glissement relatif en rotation entre le porteur et le manchon compensateur. Et ces caractéristiques d'élasticité radiale et de stabilité dimensionnelle doivent demeurer le plus longtemps possible, nonobstant un nombre important de montages/démontages par rapport au porteur.On one side, that is to say on the side of its cylindrical inner face, the compensating sleeve is centrifugally deformed or expanded but limited, over a short period, under the effect of a gas cushion under pressure (for example compressed air between 5 and 8 bars of pressure), and this to be removed from the wearer, then set up on or extracted by sliding of said carrier, as the case may be. However, the sleeve should have sufficient centripetal elasticity to return to the tight position against the wearer's cylindrical outer surface, once the stress centrifugal stops. In the tight position against the wearer, the sleeve compensator must maintain, almost permanently, stability dimensional, in particular as regards its internal section, so as to avoid, during printing, any relative sliding in rotation between the carrier and the compensating sleeve. And these characteristics of radial elasticity and dimensional stability must remain as long as possible, notwithstanding a significant number of assemblies / disassemblies compared to the carrier.
De l'autre côté, c'est-à-dire du côté de sa face extérieure cylindrique, le manchon compensateur doit demeurer relativement dur, d'une part, compte tenu de son appui en rotation contre le support à imprimer (papier, carton, matière plastique, etc.) lors du processus d'impression par flexographie, et d'autre part pour préserver à sa valeur nominale le diamètre extérieur du manchon compensateur, pour une impression flexographique contrôlée.On the other side, i.e. on the side of its outer face cylindrical, the compensating sleeve must remain relatively hard, of a part, given its rotational support against the medium to be printed (paper, cardboard, plastic, etc.) during the flexographic printing process, and on the other hand to preserve at its nominal value the outside diameter of the compensating sleeve, for controlled flexographic printing.
Cette dureté de la face extérieure permet par ailleurs son polissage, en vue de l'adhésion parfaite de la forme imprimante.This hardness of the outer face also allows its polishing, for perfect adhesion of the printer form.
Par ailleurs, il est indispensable que le manchon compensateur présente une homogénéité volumique quasi-parfaite, pour éviter tout "balourd" lors de sa rotation à vitesse élevée, générateur de vibrations dégradant la qualité de l'impression flexographique.Furthermore, it is essential that the compensating sleeve presents an almost perfect volume homogeneity, to avoid any "imbalance" during its rotation at high speed, vibration generator degrading the quality of flexographic printing.
En pratique, compte tenu de ces exigences, un manchon composite ne peut être qu'une pièce composite.In practice, given these requirements, a sleeve composite can only be a composite part.
A titre d'exemple, un manchon compensateur actuellement disponible sur le marché, fabriqué et/ou vendu par les Sociétés ROTEC et POLYWEST (en Allemagne), ROSSINI (en Italie), et AXCYL (en France), comprend, de manière solidaire les unes par rapport aux autres, et en rotation et en translation, de l'intérieur vers l'extérieur :
- un premier tube en matériau constitué par un tissu de fibres de verre ou carbone, imprégné par une résine, ayant une épaisseur de par exemple 1,2 mm,
- une couche intercalaire d'une mousse d'un matériau élastomère du type polyuréthanne, ayant une épaisseur de par exemple 1 mm,
- un deuxième tube en matériau constitué par un non tissé de fibres de verre ou carbonne, imprégné par une résine, ayant une épaisseur de par exemple 1 à 4 mm,
- une couche intermédiaire d'un matériau élastomère du type polyuréthanne, à basse densité,
- et une couche externe d'un matériau élastomère du type polyuréthanne, à haute densité,
- les couches intermédiaire et externe ayant ensemble une épaisseur variant entre 2 et 25 mm.
- a first tube of material constituted by a glass fiber or carbon fabric, impregnated with a resin, having a thickness of for example 1.2 mm,
- an intermediate layer of a foam of an elastomeric material of the polyurethane type, having a thickness of for example 1 mm,
- a second tube made of a material constituted by a nonwoven of glass fibers or carbon, impregnated with a resin, having a thickness of for example 1 to 4 mm,
- an intermediate layer of an elastomeric material of the polyurethane type, at low density,
- and an outer layer of an elastomeric material of the polyurethane type, with high density,
- the intermediate and external layers together having a thickness varying between 2 and 25 mm.
En pratique, le matériau du premier tube, en l'occurrence un tissu de fibres de verre imprégné par une résine, ne permet pas de concilier, dans la durée, élasticité radiale centrifuge et stabilité de serrage centripète.In practice, the material of the first tube, in this case a fabric glass fibers impregnated with a resin, does not allow to reconcile, in the duration, centrifugal radial elasticity and centripetal tightening stability.
Plusieurs raisons expliquent ce constat :Several reasons explain this observation:
Le matériau précité libère progressivement ses contraintes initiales, lui permettant originellement d'assurer un bon serrage ; un relâchement centrifuge se produit donc au bout d'un certain nombre de cycles montage/démontage/impression.The aforementioned material gradually releases its initial constraints, originally allowing it to ensure a good tightening; a relaxation centrifugal therefore occurs after a certain number of cycles assembly / disassembly / printing.
Ce matériau, et plus particulièrement la résine qui l'imprègne, ont une température de transition vitreuse, c'est-à-dire de passage de l'état vitreux à l'état caoutchoutique, entre 60 et 150°C. Dès lors, lors du processus de fabrication de la forme imprimante continue, sous forme de manchon, en matériau photopolymère fixée préalablement sur le manchon compensateur, cette dernière subit, lors de la polymérisation du photopolymère constituant la forme imprimante, une montée en température relativement importante, par exemple entre 110°C et 140°C pendant 30 min, en dépassant cette température de transition vitreuse, au-delà de laquelle la stabilité dimensionnelle du matériau du premier tube n'est plus garantie. Dès lors, en revenant à la température ambiante, ce matériau ne possède plus ses dimensions d'origine, ce qui compromet en particulier sa capacité de serrage. This material, and more particularly the resin which permeates it, have a glass transition temperature, that is to say a transition from the glassy state in the rubbery state, between 60 and 150 ° C. Therefore, during the process of manufacture of the continuous printer form, in the form of a sleeve, in photopolymer material previously fixed on the compensating sleeve, the latter undergoes, during the polymerization of the photopolymer constituting the printer form, a relatively large temperature rise, by example between 110 ° C and 140 ° C for 30 min, exceeding this glass transition temperature, above which stability dimension of the material of the first tube is no longer guaranteed. Therefore, in returning to room temperature, this material no longer has its original dimensions, which in particular compromises its clamping capacity.
La présente invention a pour objet de remédier aux inconvénients identifiés précédemment.The object of the present invention is to remedy the drawbacks previously identified.
L'invention a pour objet, dans le cadre d'un procédé d'impression par flexographie, un cylindre compensateur de construction particulièrement simple, présentant dans la durée, et une stabilité dimensionnelle de ses sections tant interne qu'externe, et une élasticité radiale centripète au niveau de sa face intérieure cylindrique, demeurant compatible avec cette stabilité dimensionnelle.The subject of the invention is, in the context of a printing process by flexography, a construction compensating cylinder particularly simple, presenting over time, and dimensional stability of its internal and external sections, and a centripetal radial elasticity at the level of its cylindrical inner face, remaining compatible with this stability dimensional.
Conformément à l'invention, le manchon compensateur composite comprend, de manière solidaire les unes par rapport aux autres, et en translation et en rotation, de l'intérieur vers l'extérieur :
- une base interne tubulaire métallique, à base de nickel, ménageant la face intérieure cylindrique dudit manchon compensateur, dont l'épaisseur est comprise entre 0,1 et 0,25 mm, et obtenue par galvanoplastie,
- une couche externe d'un matériau élastomère dur, ménageant la face extérieure dudit manchon compensateur,
- une couche intermédiaire d'un matériau élastomère mou, disposée entre la base interne métallique et la couche externe dure.
- a metallic tubular internal base, based on nickel, providing the cylindrical inner face of said compensating sleeve, the thickness of which is between 0.1 and 0.25 mm, and obtained by electroplating,
- an outer layer of a hard elastomeric material, providing the outer face of said compensating sleeve,
- an intermediate layer of a soft elastomeric material, disposed between the internal metal base and the hard external layer.
Par "à base de nickel", on entend que le nickel constitutif de la base interne, en quantité majoritaire, peut être allié, en quantité minoritaire, avec un ou plusieurs métaux, voire autres éléments non métalliques, dès lors que l'ensemble du nickel et/ou des autres métaux peut être déposé sur tout support approprié par électrolyse ou galvanoplastie.By "nickel-based" is meant that the nickel constituting the internal base, in majority quantity, can be alloyed, in minority quantity, with one or more metals, or even other non-metallic elements, therefore that all nickel and / or other metals can be deposited on any suitable support by electrolysis or electroplating.
Grâce à la structure composite retenue selon la présente invention, la couche externe relativement dure du manchon compensateur ne se trouve soumise à aucune déformation importante, grâce à la couche intercalaire relativement molle, nonobstant les déformations radiales centrifuges, élastiques, de la base interne.Thanks to the composite structure chosen according to the present invention, the relatively hard outer layer of the compensating sleeve is not found subject to no significant deformation, thanks to the interlayer relatively soft, notwithstanding the centrifugal radial deformations, elastic, internal base.
La couche externe relativement dure se trouve exercer une pression limitée sur la base interne, par l'intermédiaire de la couche intermédiaire relativement molle, lors des phases de dilatation de la base interne, aidant ainsi cette dernière à conserver un serrage constant sur le porteur.The relatively hard outer layer is found to exert a limited pressure on the internal base, through the layer relatively soft intermediate, during the phases of dilation of the base internal, helping the latter to keep a constant tightening on the carrier.
Grâce à l'invention, seulement avec la base intermédiaire à base de nickel, et de plus sous faible épaisseur, il est possible de concilier, au niveau de la face intérieure du manchon compensateur, et élasticité radiale centrifuge et stabilité dimensionnelle centripète. Ceci résulte en particulier du fait que le nickel obtenu par galvanoplastie, sous faible épaisseur, a une structure cristalline tridimensionnelle, cubique à face centrée, présentant homogénéité, cohésion et élasticité.Thanks to the invention, only with the intermediate base to base of nickel, and moreover under a small thickness, it is possible to reconcile, at the level of the inner face of the compensating sleeve, and radial elasticity centrifugal and centripetal dimensional stability. This results in particular from the fact that the nickel obtained by electroplating, at low thickness, has a three-dimensional, face-centered cubic crystal structure with homogeneity, cohesion and elasticity.
Il résulte des expériences menées par la Demanderesse qu'en dehors de la fourchette comprise entre (et y compris) 0,1 mm et 0,25 mm, il apparaít impossible de concilier élasticité et stabilité dimensionnelle.It follows from the experiments carried out by the Applicant that outside the range between (and including) 0.1 mm and 0.25 mm, it appears impossible to reconcile elasticity and dimensional stability.
L'obtention de la base interne par galvanoplastie permet d'obtenir dans le substrat métallique des contraintes internes permettant un serrage constant dans le temps.Obtaining the internal base by electroplating makes it possible to obtain in the metal substrate internal stresses allowing tightening constant over time.
De plus, l'état de surface, parfaitement lisse à l'intérieur de la base métallique en nickel favorise de manière importante la propagation du coussin d'air nécessaire au montage/démontage de la base sur le porteur. Cela permet donc de limiter ce filet d'air en épaisseur, ce qui réduit d'autant la dilatation de la base.In addition, the surface finish, perfectly smooth inside the base metallic nickel significantly promotes cushion spread air required for mounting / dismounting the base on the carrier. This allows therefore to limit this air stream in thickness, which correspondingly reduces the expansion of the base.
La base étant fabriquée par un procédé d'électroformage, le diamètre intérieur peut être l'exact reflet de la géométrie de la portée extérieure cylindrique du porteur. L'état de surface intérieur de la base et l'épaisseur du dépôt sont donc quasi parfaits, ce qui évite toute rectification ultérieure.The base being manufactured by an electroforming process, the inner diameter may be an exact reflection of the geometry of the outer surface cylindrical of the carrier. The interior surface finish of the base and the thickness of the deposit are therefore almost perfect, which avoids any subsequent rectification.
Enfin, le nickel est un matériau parfaitement recyclable, ce qui permet de récupérer les chutes de fabrication de la base.Finally, nickel is a perfectly recyclable material, which allows to recover the manufacturing scraps of the base.
La fabrication d'une base nickel par galvanoplastie requiert peu de manutentions, et un temps de fabrication relativement court.The fabrication of a nickel base by electroplating requires little handling, and a relatively short manufacturing time.
La présente invention est maintenant décrite par référence au dessin annexé, dans lequel la figure 1 représente une vue éclatée, à échelle agrandie, d'un ensemble porteur/manchon compensateur/forme imprimante, selon la présente invention.The present invention is now described with reference to attached drawing, in which FIG. 1 represents an exploded view, to scale enlarged, of a carrier / compensating sleeve / printer assembly, according to the present invention.
Par référence à la figure 1, tout procédé d'impression par
flexographie peut être défini de la manière suivante :
Conformément à l'invention, le manchon compensateur (3), composite, comprend, de manière solidaire les unes par rapport aux autres, et en rotation et en translation, de l'intérieur vers l'extérieur :
- une base interne (5) tubulaire, métallique, à base de nickel, ménageant la face intérieure (3a) cylindrique du manchon compensateur dont l'épaisseur est comprise entre 0, 1 et 0, 25 mm, et obtenue par galvanoplastie ou électroformage,
- une couche externe (6) d'un matériau élastomère dur, par exemple de type polyuréthanne, ménageant la face extérieure cylindrique (3b) dudit manchon compensateur (3),
- et une couche intermédiaire (7) d'un matériau élastomère mou, disposé entre la base interne métallique (5) et la couche externe (6) dure.
- a tubular, metallic, nickel-based internal base (5) providing the cylindrical inner face (3a) of the compensating sleeve, the thickness of which is between 0.1 and 0.25 mm, and obtained by electroplating or electroforming,
- an outer layer (6) of a hard elastomeric material, for example of the polyurethane type, forming the cylindrical outer face (3b) of said compensating sleeve (3),
- and an intermediate layer (7) of a soft elastomeric material, disposed between the metallic inner base (5) and the hard outer layer (6).
Il doit être entendu que d'autres constituants ou couches peuvent être disposées respectivement entre la base interne (5) et la couche intermédiaire (7), et entre la couche externe (6) et la couche intermédiaire (7). It should be understood that other constituents or layers may be arranged respectively between the internal base (5) and the layer intermediate (7), and between the outer layer (6) and the intermediate layer (7).
Préférentiellement, le manchon compensateur (3) est constitué uniquement par la base interne (5) tubulaire, la couche externe (6) du matériau élastomère dur, et la couche intermédiaire (7) du matériau élastomère mou, liées les unes aux autres.Preferably, the compensating sleeve (3) is made up only by the internal tubular base (5), the external layer (6) of the material hard elastomer, and the intermediate layer (7) of the soft elastomer material, bonded to each other.
Préférentiellement, la différence de dureté entre le matériau élastomère dur et le matériau élastomère mou est au moins égal à 30 Shore D.Preferably, the difference in hardness between the material hard elastomer and the soft elastomer material is at least 30 Shore D.
Le cylindre compensateur décrit précédemment comporte par exemple au moins l'une des caractéristiques secondaires suivantes :
- la couche intermédiaire (7) du matériau élastomère mou a une épaisseur au plus égale à 40 mm, préférentiellement comprise entre 1 et 20 mm, et par exemple égale à 7 mm
- le matériau élastomère dur, par exemple du type polyuréthane, a une dureté au moins égale à 50 Shore D, préférentiellement comprise entre 50 et 90 Shore D, et par exemple de l'ordre de 70 Shore D avec une densité de 1,15 g/cm3
- le matériau élastomère mou, a une dureté au plus égale à 60 Shore A, préférentiellement comprise entre 60 Shore A et 50 Shore D, et par exemple de l'ordre de 30 Shore D avec une densité de l'ordre de 0,75 g/cm3
- the intermediate layer (7) of the soft elastomeric material has a thickness at most equal to 40 mm, preferably between 1 and 20 mm, and for example equal to 7 mm
- the hard elastomer material, for example of the polyurethane type, has a hardness at least equal to 50 Shore D, preferably between 50 and 90 Shore D, and for example of the order of 70 Shore D with a density of 1.15 g / cm 3
- the soft elastomeric material has a hardness at most equal to 60 Shore A, preferably between 60 Shore A and 50 Shore D, and for example of the order of 30 Shore D with a density of the order of 0.75 g / cm 3
A titre d'exemple, on décrit ci-après la fabrication d'un manchon
compensateur selon la présente invention :
Claims (7)
la couche externe (6) du matériau élastomère dur, et la couche intermédiaire (7) du matériau élastomère mou, liées les unes aux autres.Method according to claim 1, characterized in that the compensating sleeve (3) consists of the internal tubular base (5),
the outer layer (6) of the hard elastomeric material, and the intermediate layer (7) of the soft elastomeric material, bonded to each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0207797 | 2002-06-24 | ||
FR0207797A FR2841176B1 (en) | 2002-06-24 | 2002-06-24 | COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1375145A2 true EP1375145A2 (en) | 2004-01-02 |
EP1375145A3 EP1375145A3 (en) | 2004-06-09 |
Family
ID=29717088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03356096A Withdrawn EP1375145A3 (en) | 2002-06-24 | 2003-06-23 | Compensation sleeve for the flexographic printing |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1375145A3 (en) |
DE (1) | DE03356096T1 (en) |
ES (1) | ES2217997T1 (en) |
FR (1) | FR2841176B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005092618A1 (en) * | 2004-03-29 | 2005-10-06 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3633155A1 (en) * | 1986-09-30 | 1988-04-07 | Saueressig & Co | Impression cylinder, in particular for the flexographic printing method |
WO1998029259A1 (en) * | 1997-01-04 | 1998-07-09 | Rotec Hülsensysteme Gmbh | Metal pressure sleeve with a hard plastic coating |
EP1164011A3 (en) * | 2000-06-16 | 2005-09-14 | ROSSINI S.p.A. | Multi-layered printing sleeve |
-
2002
- 2002-06-24 FR FR0207797A patent/FR2841176B1/en not_active Expired - Fee Related
-
2003
- 2003-06-23 DE DE2003356096 patent/DE03356096T1/en active Pending
- 2003-06-23 EP EP03356096A patent/EP1375145A3/en not_active Withdrawn
- 2003-06-23 ES ES03356096T patent/ES2217997T1/en active Pending
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005092618A1 (en) * | 2004-03-29 | 2005-10-06 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
US7861652B2 (en) | 2004-03-29 | 2011-01-04 | Goss International Montataire Sa | Packing sleeve for a printing unit cylinder of an offset printing press |
Also Published As
Publication number | Publication date |
---|---|
EP1375145A3 (en) | 2004-06-09 |
ES2217997T1 (en) | 2004-11-16 |
FR2841176A1 (en) | 2003-12-26 |
DE03356096T1 (en) | 2004-10-21 |
FR2841176B1 (en) | 2005-08-26 |
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