FR2841176A1 - COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING - Google Patents
COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING Download PDFInfo
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- FR2841176A1 FR2841176A1 FR0207797A FR0207797A FR2841176A1 FR 2841176 A1 FR2841176 A1 FR 2841176A1 FR 0207797 A FR0207797 A FR 0207797A FR 0207797 A FR0207797 A FR 0207797A FR 2841176 A1 FR2841176 A1 FR 2841176A1
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- Prior art keywords
- compensating sleeve
- face
- shore
- carrier
- elastomeric material
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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
- B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
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- Printing Plates And Materials Therefor (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Abstract
Manchon compensateur (3) composite, adapté spécifiquement pour compenser l'écart dimensionnel existant entre un porteur (1) d'entraînement en rotation et une forme imprimante (2) dont la face extérieure (2b) forme un cliché flexographique, caractérisé en ce que, il 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 tubulaire (5) métallique, à base de nickel, ménageant la face intérieure (3a) cylindrique dudit manchon compensateur, dont l'épaisseur est comprise entre 0, 1 et 0, 25 mm, et obtenue par galvanoplastie,- une couche exteme (6) d'un matériau élastomère dur, ménageant la face extérieure (3b) dudit manchon compensateur,- une couche intermédiaire (7) d'un matériau élastomère mou, disposée entre la base interne métallique (5) et la couche externe (6) dure.Compensating sleeve (3) composite, specifically adapted to compensate for the dimensional difference existing between a carrier (1) for driving in rotation and a printing form (2) whose outer face (2b) forms a flexographic cliché, characterized in that , it comprises, integral with each other, and in rotation and in translation, from the inside to the outside: - a tubular internal metal base (5), based on nickel, sparing the internal face ( 3a) cylindrical of said compensating sleeve, the thickness of which is between 0.1 and 0.25 mm, and obtained by electroplating, - an outer layer (6) of a hard elastomeric material, sparing the outer face (3b) of said compensating sleeve, - an intermediate layer (7) of a soft elastomeric material, arranged between the metal inner base (5) and the hard outer layer (6).
Description
analogues.like.
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La presente invention concerne un procede d'impression par flexographie selon lequel, de maniere generale: - a) on dispose d'au moins un porteur d'entranement en rotation menageant une portee exterieure cylindrique, une forme imprimante, continue ou discontinue, presentant une face interne plane, et une face externe en relief formant cliche flexographique, et un manchon compensateur composite entre, d'un cote la portee exterieure du porteur, et de l'autre cote la face interne de la forme, ce manchon compensateur comportant lui-meme une face interieure cylindrique adaptee a un emmanchement par coulissement puis serrage sur la portee exterieure du porteur, et une face exterieure cylindrique dont la surface developpee est adaptee au support et a la fixation de la forme imprimante formee ou deformee de maniere cylindrique, par sa face interne, - b) on fixe la forme imprimante sur le manchon compensateur -c) on emmanche le manchon compensateur sur le porteur, de maniere calee en rotation par rapport a ce dernier, - d) on applique ['ensemble solidaire en rotation, constitue par le porteur, le manchon compensateur, et la forme dont le cliche est revetu d'une encre, en rotation, au contact d'un support a imprimer tel qu'une feuille de papier, carton, ou polyethylene Par consequent, un manchon compensateur est adapte specifiquement pour compenser l'ecart dimensionnel existent entre un porteur d'entranement en rotation et une forme imprimante dont la face exterieure forme un cliche flexographique. Un manchon compensateur doit etre distingue, d'une part d'un manchon dtimpression flexographique, constitue en general par une base metallique ou en materiau composite, revetue d'un photopolymere ou caoutchouc, et d'autre part d'un manchon de transfert, ou blanches, constitue The present invention relates to a flexographic printing process according to which, generally: - a) there is at least one rotary drive carrier providing a cylindrical outer surface, a continuous or discontinuous printer form, having a flat internal face, and an external face in relief forming a flexographic plate, and a composite compensating sleeve between, on one side the outer bearing surface of the wearer, and on the other side the internal face of the form, this compensating sleeve comprising itself even a cylindrical inner face adapted to a sliding fitting then clamping on the outer bearing surface of the carrier, and a cylindrical outer face whose developed surface is adapted to the support and to the fixing of the printer form formed or deformed in a cylindrical manner, by its internal face, - b) the printer form is fixed on the compensating sleeve -c) the compensating sleeve is fitted onto the carrier, in rotationally wedged pa r in relation to the latter, - d) the rotational integral assembly is applied, constituted by the carrier, the compensating sleeve, and the shape of which the cliche is coated with an ink, in rotation, in contact with a support a printing such as a sheet of paper, cardboard, or polyethylene Consequently, a compensating sleeve is specifically adapted to compensate for the dimensional difference existing between a rotational drive carrier and a printing form whose outer face forms a flexographic plate. A compensating sleeve must be distinguished, on the one hand from a flexographic printing sleeve, generally constituted by a metallic or composite base, coated with a photopolymer or rubber, and on the other hand by a transfer sleeve, or white, constitutes
generalement d'une base metallique revetue de caoutchouc. 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 presenter diverges caracteristiques mecaniques relativement antagonistes, avec des dimensions interieures et exterieures particulierement precises. D'un cote, c'est-a-dire du cote de sa face interieure cylindrique, le manchon compensateur est deforme ou dilate de maniere centrifuge mais limitee, sur une course duree, sous l'effet d'un coussin gazeux sous pression (par exemple de l'air comprime entre 5 et 8 bars de pression), et ce pour etre ecarte du porteur, puis mis en place sur ou extrait par Today, a flexographic printing compensating sleeve constitutes a component of relatively large size and weight, which must have various relatively antagonistic mechanical characteristics, with particularly precise internal and external dimensions. On one side, that is to say on the side of its cylindrical inner face, the compensating sleeve is deformed or dilated in a centrifugal manner but limited, over a long stroke, under the effect of a gaseous cushion under pressure ( for example air compressed between 5 and 8 bars of pressure), and this to be removed from the carrier, then placed on or extracted by
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coulissement audit porteur, selon le cast Neanmoins, le manchon doit presenter une elasticite centripete suffisante pour revenir en position serree contre la portee exterieure cylindrique du porteur, une fois que la sollicitation centrifuge cesse. En position serree contre le porteur, le manchon compensateur doit conserver, de fa,con quasi permanente, une stabilite dimensionnelle, en particulier quant a sa section interieure, de maniere a eviter, lors de ['impression, tout glissement relatif en rotation entre le porteur et le manchon compensateur. Et ces caracteristiques d'elasticite radiale et de stabilite dimensionnelle doivent demeurer le plus longtemps possible, nonobstant un nombre important de montages/demon/ages par rapport au porteur. De l'autre cOte, c'est-a-dire du cOte de sa face exterieure cylindrique, le manchon compensateur doit demeurer relativement cur, d'une part, compte tenu de son appui en rotation contre le support a imprimer (papier, carton, matiere plastique, etc.) lors du processus d'impression par flexographie, et d'autre part pour preserver a sa valeur nominale le diametre exterieur du sliding to said carrier, according to the cast Nevertheless, the sleeve must have sufficient centripetal elasticity to return to the tight position against the cylindrical outer surface of the carrier, once the centrifugal stress ceases. In the tight position against the wearer, the compensating sleeve must retain, almost permanently, dimensional stability, in particular as regards its inner 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 / demons / ages in relation to the wearer. On the other side, that is to say on the side of its cylindrical outer face, the compensating sleeve must remain relatively cur, on the one hand, given its support in rotation against the support to be printed (paper, cardboard , plastic material, etc.) during the flexographic printing process, and on the other hand to preserve at its nominal value the outside diameter of the
manchon compensateur, pour une impression flexographique contr61ee. compensating sleeve, for controlled flexographic printing.
Cette durete de la face exterieure permet par ailleurs son This hardness of the outer face also allows its
polissage, en vue de ['adhesion parfaite de la forme imprimante. polishing, for the perfect adhesion of the printer form.
Par ailleurs, il est indispensable que le manchon compensateur presente une homogeneite volumique quasi-parfaite, pour eviter tout "balourd" lors de sa rotation a vitesse elevee, generateur de vibrations degradant la In addition, it is essential that the compensating sleeve present an almost perfect volume homogeneity, to avoid any "unbalance" during its rotation at high speed, generator of vibrations degrading the
qualite de ['impression flexographique. quality of flexographic printing.
En pratique, compte tenu de ces exigences, un manchon In practice, given these requirements, a sleeve
composite ne peut etre qu'une piece composite. composite can only be a composite part.
A titre d'exemple, un manchon compensateur actuellement disponible sur le marche, fabrique eVou vendu par les Societes ROTEC et POLYWEST (en Allemagne), ROSSINI (en Italie), et AXCYL (en France), comprend, de maniere solidaire les unes par rapport aux autres, et en rotation et en translation, de l'interieur vers l'exterieur: - un premier tube en materieu constitue par un tissu de fibres de verre ou carbone, impregne par une resine, ayant une epaisseur de par exemple 1,2 mm, For example, a compensating sleeve currently available on the market, manufactures eVou sold by the Societies ROTEC and POLYWEST (in Germany), ROSSINI (in Italy), and AXCYL (in France), includes, in a united way in relation to the others, and in rotation and in translation, from the inside to the outside: - a first tube of material constituted by a fabric of glass or carbon fibers, impregnated with a resin, having a thickness of for example 1, 2 mm,
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- une couche intercalaire d'une mousse d'un materiau elastomere du type polyurethanne, ayant une epaisseur de par exemple 1 mm, - un deuxieme tube en materiau constitue par un non tisse de fibres de verre ou carbonne, impregne par une resine, ayant une epaisseur de par exemple 1 a 4 mm, une couche intermediaire d'un materiau elastomere du type polyurethanne, a basse densite, - et une couche externe d'un materiau elastomere du type polyurethanne, a haute densite, - les couches intermediaire et externe ayant ensemble une - 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 of material constituted by a nonwoven of glass or carbon fibers, 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 external layer of an elastomeric material of the polyurethane type, at high density, - the intermediate and external layers having together a
epaisseur variant entre 2 et 25 mm.thickness varying between 2 and 25 mm.
En pratique, le materiau du premier tube, en ['occurrence un tissu de fibres de verre impregne par une resine, ne permet pas de concilier, dans la In practice, the material of the first tube, in this case a glass fiber fabric impregnated with a resin, does not make it possible to reconcile, in the
duree, elasticite radiale centrifuge et stabilite de serrage centripete. duration, centrifugal radial elasticity and centripetal clamping stability.
Plusieurs raisons expliquent ce constat: Le materiau precise libere progressivement ses contraintes initiales, lui permettant originellement d'assurer un bon serrage; un relachement centrifuge se produit done au bout d'un certain nombre de cycles Several reasons explain this observation: The precise material gradually releases its initial constraints, allowing it originally to ensure good tightening; a centrifugal release therefore occurs after a certain number of cycles
montage/demon/age/impression.mounting / demon / age / printing.
Ce materieu, et plus particulierement la resine qui l'impregne, ont une temperature de transition vitreuse, c'est-a-dire de passage de l'etat vitreux a l'etat caoutchoutique, entre 60 et 150 C. Des lors, lors du processus de fabrication de la forme imprimante continue, sous forme de manchon, en materiau photopolymere fixee prealablement sur le manchon compensateur, cette derriere subit, lors de la polymerisation du photopolymere constituent la forme imprimante, une montee en temperature relativement importante, par exemple entre 1 1 0 C et 1 40 C pendant 30 min. en depassant cette temperature de transition vitreuse, au-dela de laquelle la stabilite dimensionnelle du materiau du premier tube n'est plus garantie. Des lors, en revenant a la temperature ambiante, ce materieu ne possede plus ses This material, and more particularly the resin which impregnates it, has a glass transition temperature, that is to say a passage from the glassy state to the rubbery state, between 60 and 150 C. Consequently, during of the manufacturing process of the continuous printer form, in the form of a sleeve, made of photopolymer material fixed beforehand on the compensating sleeve, this latter undergoes, during the polymerization of the photopolymer constitute the printer form, a relatively large rise in temperature, for example between 1 1 0 C and 1 40 C for 30 min. by exceeding this glass transition temperature, beyond which the dimensional stability of the material of the first tube is no longer guaranteed. Therefore, returning to room temperature, this material no longer has its
dimensions d'origine, ce qui compromet en particulier sa capacite de serrage. original dimensions, which in particular compromises its clamping capacity.
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La presente invention a pour objet de remedier aux inconvenients The object of the present invention is to remedy the drawbacks
identifies precedemment.previously identified.
L'invention a pour objet, dans le cadre d'un procede d'impression par flexographie, un cylindre compensateur de construction particulierement simple, presentant dans la duree, et une stabilite dimensionnelle de ses sections tent interne qu'externe, et une elasticite radiale centripete au niveau de sa face interieure cylindrique, demeurant compatible avec cette stabilite dimensionnelle. Conformement a ['invention, le manchon compensateur composite comprend, de maniere solidaire les unes par rapport aux autres, et en translation et en rotation, de l'interieur vers l'exterieur: - une base interne tubulaire metallique, a base de nickel, menageant la face interieure cylindrique audit manchon compensateur, dont l'epaisseur est comprise entre O,1 et O,25 mm, et obtenue par galvanoplastie, - une couche externe d'un materiau elastomere cur, menageant la face exterieure audit manchon compensateur, - une couche intermediaire d'un materiau elastomere mou, The subject of the invention is, within the framework of a flexographic printing process, a compensating cylinder of particularly simple construction, having a long-term duration, and a dimensional stability of its internal and external tent sections, and a radial elasticity. centripetal at its cylindrical inner face, remaining compatible with this dimensional stability. In accordance with the invention, the composite compensating sleeve comprises, in relation to one another, and in translation and in rotation, from the inside to the outside: - an internal tubular metal base, based on nickel, providing the cylindrical inner face to said compensating sleeve, the thickness of which is between 0.1 and 0.25 mm, and obtained by electroplating, - an outer layer of a cur elastomeric material, providing the outer face to said compensating sleeve, - an intermediate layer of a soft elastomeric material,
disposee entre la base interne metallique et la couche externe cure. placed between the internal metal base and the external cure layer.
Par"a base de nickel", on entend que le nickel constitutif de la base i nterne, en qu antite majoritai re, peut etre al lie, en quantite minoritai re, avec un ou plusieurs metaux, voire autres elements non metalliques, des lors que ['ensemble du nickel et/ou des autres metaux peut etre depose sur tout By "nickel-based" is meant that the nickel constituting the internal base, in the majority, can be bonded, in minority, with one or more metals, or even other non-metallic elements, as a result. that all nickel and / or other metals can be deposited on any
support approprie par electrolyse ou galvanoplastie. suitable support by electrolysis or electroplating.
Grace a la structure composite retenue selon la presente invention, la couche externe relativement cure du manchon compensateur ne se trouve soumise a aucune deformation importante, grace a la couche intercalaire relativement moue, nonobstant les deformations radiales centrifuges, Thanks to the composite structure retained according to the present invention, the relatively cured outer layer of the compensating sleeve is not subjected to any significant deformation, thanks to the relatively soft intermediate layer, notwithstanding the centrifugal radial deformations,
elastiques, de la base interne.elastic, internal base.
La couche externe relativement cure se trouve exercer une pression limitee sur la base interne, par l'intermediaire de la couche intermediaire relativement moue, lors des phases de dilatation de la base interne, aidant ainsi cette derriere a conserver un serrage constant sur le porteur. Grace a ['invention, seulement avec la base intermediaire a base de nickel, et de plus sous falble epaisseur, il est possible deconcilier, au The relatively cured outer layer is exerted a limited pressure on the inner base, through the relatively soft intermediate layer, during the expansion phases of the inner base, thus helping the latter to maintain a constant tightening on the wearer. Thanks to the invention, only with the intermediate base based on nickel, and moreover under thick thickness, it is possible to reconcile, at
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niveau de la face interieure du manchon compensateur, et elasticite radiale centrifuge et stabilite dimensionnelle centripete. Ceci resulte en particulier du fait que le nickel obtenu par galvanoplastie, sous falble epaisseur, a une structure cristalline tridimensionnelle, cubique a face centree, presentant homogeneite, cohesion et elasticite. II resulte des experiences menees par la Demanderesse quten dehors de la fourchette comprise entre (et y compris) O,1 mm et O,25 mm, il level of the inner face of the compensating sleeve, and centrifugal radial elasticity and centripetal dimensional stability. This results in particular from the fact that the nickel obtained by electroplating, under thick thickness, has a three-dimensional, cubic crystal structure with a centered face, exhibiting homogeneity, cohesion and elasticity. It results from the experiments carried out by the Applicant that outside the range between (and including) 0.1 mm and 0.25 mm, it
appara^'t impossible de concilier elasticite et stabilite dimensionnelle. It seems impossible to reconcile elasticity and dimensional stability.
L'obtention de la base interne par galvanoplastie permet d'obtenir dans le substrat metallique des contraintes internee permettant un serrage Obtaining the internal base by electroplating makes it possible to obtain internal stresses in the metal substrate allowing tightening
constant dans le temps.constant over time.
De plus, I'etat de surface, parfaitement lisse a l'interieur de la base metallique en nickel favorise de maniere importante la propagation du coussin d'air necessaire au montage/demon/age de la base sur le porteur. Cela permet done de limiter ce filet d'air en epaisseur, ce qui reduit d'autant la dilatation de In addition, the perfectly smooth surface condition inside the nickel metal base considerably promotes the propagation of the air cushion necessary for mounting / demon / age of the base on the carrier. This therefore makes it possible to limit this air stream in thickness, which therefore reduces the expansion of
la base.the base.
La base etant fabriquee par un procede d'electroformage, le diametre interieur peut etre ['exact reflet de la geometric de la portee exterieure cylindrique du porteur. L'etat de surface interieur de la base et l'epaisseur du The base being manufactured by an electroforming process, the internal diameter can be ['exact reflection of the geometric of the cylindrical external bearing of the carrier. The interior surface finish of the base and the thickness of the
depot vent done quasi parfaits, ce qui evite toute rectification ulterieure. deposit therefore almost perfect, which avoids any subsequent rectification.
Enfin, le nickel est un materiau parfaitement recyclable, ce qui Finally, nickel is a perfectly recyclable material, which
permet de recuperer les chutes de fabrication de la base. allows to recover the manufacturing scraps of the base.
La fabrication d'une base nickel par galvanoplastie requiert peu de The fabrication of a nickel base by electroplating requires little
manutentions, et un temps de fabrication relativement court. handling, and a relatively short manufacturing time.
La presente invention est maintenant decrite par reference au dessin annexe, dans lequel la figure 1 represente une vue eclatee, a echelle agrandie, d'un ensemble porteur/manchon compensateur/forme imprimante, The present invention is now described with reference to the accompanying drawing, in which FIG. 1 represents an exploded view, on an enlarged scale, of a carrier / compensating sleeve / printer form assembly,
selon la presente invention.according to the present invention.
Par reference a la figure 1, tout procede d'impression par flexographie peut etre defini de la maniere suivante: a) au depart, on dispose d'au moins un porteur (1) d'entranement en rotation, pourvu d'orifices d'ejection d'air comprime (10), et menageant une portee exterieure (1a) parfaitement cylindrique, d'une forme imprimante (2) continue ou discontinue presentant une face With reference to FIG. 1, any flexographic printing process can be defined as follows: a) at the start, there is at least one carrier (1) for rotational drive, provided with orifices compressed air ejection (10), and providing a perfectly cylindrical outer surface (1a), of a continuous or discontinuous printer form (2) having one side
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interne (2a) plane, et une face externe (2b) en relief formant cliche d'impression flexographique, et d'un manchon compensateur (3) composite entre, d'un cote la portee exterieure (1a) du porteur (1), et de l'autre cote la face interne (2a) de la forme (2), ce manchon compensateur comportant lui meme une face interieure cylindrique (3a) adaptee a un emmanchement par coulissement puis serrage sur la portee exterieure (1a) du porteur (1), et une face exterieure (3b) cylindrique, dont la surface developpee est adaptee au support et a la fixation de la forme imprimante (2) formee ou deformee de maniere cylindrique, par sa face interne (2a) b) on fixe la forme imprimante (2) sur le manchon compensateur (3), par tout moyen approprie, par exemple par collage, ou fusion du materiau photopolymere la constituent c) on emmanche le manchon compensateur sur le porteur, de maniere calee en rotation par rapport a ce dernier, et ce grace au coussin d'air internal (2a) planar, and an external face (2b) in relief forming a flexographic printing plate, and a composite compensating sleeve (3) between, on one side, the external bearing surface (1a) of the carrier (1), and on the other side the internal face (2a) of the form (2), this compensating sleeve itself comprising a cylindrical internal face (3a) adapted to a fitting by sliding then tightening on the external bearing (1a) of the carrier ( 1), and a cylindrical outer face (3b), the developed surface of which is adapted to the support and to the fixing of the printer form (2) formed or deformed in a cylindrical manner, by its internal face (2a) b) the printer form (2) on the compensating sleeve (3), by any suitable means, for example by gluing, or melting of the photopolymeric material constituting it c) the compensating sleeve is fitted onto the carrier, so that it is rotated with respect last, thanks to the air cushion
(1 0)(1 0)
d) on applique ['ensemble solidaire en rotation, constitue par le porteur (1), le manchon compensateur (3), et la forme imprimante (2), dont le cliche (2b) est revetu d'une encre, en rotation, au contact d'un support (4) a d) applying the rotational integral assembly, constituted by the carrier (1), the compensating sleeve (3), and the printer form (2), the plate (2b) of which is coated with ink, in rotation, in contact with a support (4) a
imprimer, par exemple d'une feuille de papier ou polyethylene. print, for example from a sheet of paper or polyethylene.
Conformement a ['invention, le manchon compensateur (3), composite, comprend, de maniere solidaire les unes par rapport aux autres, et en rotation et en translation, de l'interieur vers l'exterieur: - une base interne (5) tubulaire, metallique, a base de nickel, menageant la face interieure (3a) cylindrique du manchon compensateur dont I'epaisseur est comprise entre 0, 1 et 0, 25 mm, et obtenue par galvanoplastie ou electroformage, - une couche externe (6) d'un materiau elastomere cur, par exemple de type polyurethanne, menageant la face exterieure cylindrique (3b) audit manchon compensateur (3), - et une couche intermediaire (7) d'un materiau elastomere mou, According to the invention, the compensating sleeve (3), composite, comprises, in a fixed manner with respect to each other, and in rotation and in translation, from the inside to the outside: - an internal base (5) tubular, metallic, nickel-based, forming 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 cur elastomeric material, for example of the polyurethane type, providing the cylindrical outer face (3b) to said compensating sleeve (3), and an intermediate layer (7) of a soft elastomeric material,
dispose entre la base interne metallique (5) et la couche externe (6) cure. disposed between the internal metal base (5) and the external layer (6) cure.
II doit etre entendu que d'autres constituents ou couches peuvent etre disposees respectivement entre la base interne (5) et la couche It should be understood that other constituents or layers can be arranged respectively between the internal base (5) and the layer
intermediaire (7), et entre la couche externe (6) et la couche intermediaire (7). intermediate (7), and between the outer layer (6) and the intermediate layer (7).
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Preferentiellement, le manchon compensateur (3) est constitue uniquement par la base interne (5) tubulaire, la couche externe (6) du materiau elastomere cur, et la couche intermediaire (7) du materiau Preferably, the compensating sleeve (3) is constituted solely by the internal tubular base (5), the external layer (6) of the elastomeric core material, and the intermediate layer (7) of the material.
eiastomere mou, liees les unes aux autres. soft elastomer, linked to each other.
Preferentiellement, la difference de durete entre le materiau elastomere dur et le materiau elastomere mou est au moins egal a 30 Shore D. Le cylindre compensateur decrit precedemment comporte par exemple au moins l'une des caracteristiques secondaires suivantes: - la couche externe (6) du materiau elastomere dur a une epaisseur au plus egale a 5 mm, preferentiellement comprise entre 1 et 20 mm, et par exemple egale 3 2 mm - la couche intermediaire (7) du materiau elastomere mou a une epaisseur au p!us ega!e a 40 mm,,oreferentlellement comprise entre 1 et 30 mm, et par exemple egale a 7 mm - le materiau elastomere cur, par exemple du type polyurethane, a une durete au moins egale a 50 Shore D, preferentiellement comprise entre 50 et 90 Shore D, et par exemple de l'ordre de 70 Shore D avec une densite de 1,1 5 g/cm3 - - le materiau elastomere mou, a une durete au plus egale a Shore A, preferentiellement comprise entre 60 Shore A et 50 Shore D, et par exemple de ltordre de 30 Shore D avec une densite de ltordre de 0,75 g/cm3 A titre d'exemple, on decrit ci-apres la fabrication d'un manchon compensateur selon la presente invention: (1) une base interne (5) en nickel ayant par exemple une epaisseur de 0.15 mm, est obtenue pr galvanopiastie (2) cette base interne (5) est emmanchee sur le porteur 1, par les moyens pneumatiques (10) decrits precedemment. L'ensemble est alors mis en rotation, a vitesse contante, sur un bane de tour, (3) un polyurethanne mou, susceptible de se reticular, ou encoures de reticulation, est depose, en une ou plusieurs passes, par une buse de courage qui se deplace parallelement a l'axe du porteur 1, pendant la rotation de celui-ci. Le bourrelet de matiere ainsi cree enrobe helicodalement ['ensemble de la surface exterieure de la base interne 5, sur une epaisseur de 2 a 3 mm, une fois reticule Preferably, the difference in hardness between the hard elastomeric material and the soft elastomeric material is at least equal to 30 Shore D. The compensating cylinder described above comprises for example at least one of the following secondary characteristics: - the outer layer (6) hard elastomeric material with a thickness at most equal to 5 mm, preferably between 1 and 20 mm, and for example equal to 3 2 mm - the intermediate layer (7) of soft elastomeric material with a thickness at most equal! 40 mm, orally between 1 and 30 mm, for example equal to 7 mm - the elastomeric 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 1.1 5 g / cm3 - - the soft elastomeric material, at a hardness at most equal to Shore A, preferably between 60 Shore A and 50 Shore D , and for example of the order of 30 Shore D with c a density of the order of 0.75 g / cm 3 By way of example, the following describes the manufacture of a compensating sleeve according to the present invention: (1) an internal base (5) of nickel having for example a 0.15 mm thick, is obtained for electroplating (2) this internal base (5) is fitted onto the carrier 1, by the pneumatic means (10) described above. The assembly is then rotated, at constant speed, on a lathe bane, (3) a soft polyurethane, liable to reticular, or liable to crosslinking, is deposited, in one or more passes, by a nozzle of courage which moves parallel to the axis of the carrier 1, during the rotation thereof. The bead of material thus created helically coats the entire outer surface of the internal base 5, to a thickness of 2 to 3 mm, once cross-linked
28411 7628 411 76
(4) une fois la surface recouverte, la tete d'enrobage se positionne de nouveau au point de depart, prete a effectuer un nouveau passage, avec un changement de matiere, en ltoccurrence avec un polyurethanne cure, susceptible de se reticuler ou en cours de reticulation, et ce toujours en une ou plusieurs passes (5) une fois l'enrobage effectue avec le polyurethanne mou et avec le polyurethanne cur, le manchon compensateur (3), ainsi fabrique, est sorti du (4) once the surface is covered, the coating head is positioned again at the starting point, ready to carry out a new passage, with a change of material, in this case with a cured polyurethane, liable to crosslink or in progress still in one or more passes (5) once the coating has been carried out with the soft polyurethane and with the core polyurethane, the compensating sleeve (3), thus produced, is removed from the
porteur (1), par les memes moyens pneumatiques (10). carrier (1), by the same pneumatic means (10).
(6) la surface exterieure du manchon compensateur peut-etre, le cas echeant, usinee, pour lui donner les dimension et l'etat de la surface (6) the external surface of the compensating sleeve perhaps, if necessary, machined, to give it the dimension and the state of the surface
necesaires a la misse en place de la forme imprimante 2. necessary to set up the printer form 2.
c 28411 76c 28411 76
Claims (7)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207797A FR2841176B1 (en) | 2002-06-24 | 2002-06-24 | COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING |
| EP03356096A EP1375145A3 (en) | 2002-06-24 | 2003-06-23 | Compensation sleeve for the flexographic printing |
| ES03356096T ES2217997T1 (en) | 2002-06-24 | 2003-06-23 | COMPENSATOR HOSE FOR FLEXOGRAPHIC PRINTING. |
| DE2003356096 DE03356096T1 (en) | 2002-06-24 | 2003-06-23 | Compensation sleeve for flexographic printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207797A FR2841176B1 (en) | 2002-06-24 | 2002-06-24 | COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2841176A1 true FR2841176A1 (en) | 2003-12-26 |
| FR2841176B1 FR2841176B1 (en) | 2005-08-26 |
Family
ID=29717088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0207797A Expired - Fee Related FR2841176B1 (en) | 2002-06-24 | 2002-06-24 | COMPENSATOR SLEEVE FOR FLEXOGRAPHIC PRINTING |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1375145A3 (en) |
| DE (1) | DE03356096T1 (en) |
| ES (1) | ES2217997T1 (en) |
| FR (1) | FR2841176B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004015248A1 (en) | 2004-03-29 | 2005-10-13 | Goss International Montataire S.A. | Lifting sleeve for a printing cylinder of an offset printing machine |
Citations (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 |
| EP1164011A2 (en) * | 2000-06-16 | 2001-12-19 | Erminio 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 EP EP03356096A patent/EP1375145A3/en not_active Withdrawn
- 2003-06-23 ES ES03356096T patent/ES2217997T1/en active Pending
- 2003-06-23 DE DE2003356096 patent/DE03356096T1/en active Pending
Patent Citations (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 |
| EP1164011A2 (en) * | 2000-06-16 | 2001-12-19 | Erminio Rossini S.P.A. | Multi-layered printing sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2841176B1 (en) | 2005-08-26 |
| EP1375145A3 (en) | 2004-06-09 |
| DE03356096T1 (en) | 2004-10-21 |
| EP1375145A2 (en) | 2004-01-02 |
| ES2217997T1 (en) | 2004-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20070228 |