EP0356293A1 - Cylinder, particularly for a printing works - Google Patents

Cylinder, particularly for a printing works Download PDF

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Publication number
EP0356293A1
EP0356293A1 EP89402222A EP89402222A EP0356293A1 EP 0356293 A1 EP0356293 A1 EP 0356293A1 EP 89402222 A EP89402222 A EP 89402222A EP 89402222 A EP89402222 A EP 89402222A EP 0356293 A1 EP0356293 A1 EP 0356293A1
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EP
European Patent Office
Prior art keywords
cylinder
sleeves
fibers
spacer
cylinder according
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EP89402222A
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German (de)
French (fr)
Inventor
Jean 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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders

Definitions

  • the present invention relates to a cylinder in particular for printing and its manufacturing process.
  • the object of the invention is therefore to solve these problems by proposing a cylinder in particular for printing which is extremely resistant to deformation and as light as possible.
  • the subject of the invention is a cylinder, in particular a printing cylinder, characterized in that it comprises a first internal tubular sleeve adapted to cooperate with a support shaft and a second external tubular sleeve arranged around the first and coaxial with the latter, the outer surface of which is adapted to receive a working coating, the two sleeves being connected by at least one radial spacer, and in that the first and second internal and external tubular sleeves and said at least one radial spacer, are made of fiber-reinforced resin.
  • the first and second sleeves can be connected by several radial spacers.
  • the or each spacer is in one piece with the sleeves.
  • the invention also relates to a method of manufacturing a cylinder as described above, characterized in that fibers are wound around a first cylindrical cavity so as to form a first part of structure of fibers corresponding to the first internal sleeve, there is around a portion of this part of the structure, a second imprint delimiting at least one free space determining the thickness and the height of said at least one radial spacer, in which are wound fibers so as to form a second part of fiber structure corresponding to the spacer and the fibers are wound around this second imprint so as to form a third part of fiber structure corresponding to the second outer sleeve.
  • this cylinder 1 has a first internal tubular sleeve 2 adapted to cooperate with a shaft support and a second external tubular sleeve 3 disposed around the first sleeve and coaxial with it.
  • the external surface of the second external tubular sleeve 3 is adapted to receive a working covering and the sleeves 2 and 3 are connected by at least one radial spacer 4.
  • This spacer is advantageously of one piece with the sleeves and as shown in this figure, this spacer can be provided at one of the ends of the sleeves.
  • the cylinder according to the invention consists of resin reinforced with fibers, for example glass.
  • the glass fiber structure can be produced by filament winding, this process being illustrated in this figure 1.
  • This process consists in winding around a first tubular impression 5, fibers so as to form a first part of fiber structure corresponding to the first internal tubular sleeve 2, to arrange around a portion of this first part of fiber structure , a second cavity 6 comprising a tubular mandrel 7 and a stop ring 8, delimiting between them a free space determining the thickness and the height of the radial spacer.
  • a second cavity 6 comprising a tubular mandrel 7 and a stop ring 8 delimiting between them a free space determining the thickness and the height of the radial spacer.
  • We then wind fibers in this free space so as to form a second part of fiber structure corresponding to the spacer and finally we wind the around this mandrel 7 of the fibers so as to form a third part of the fiber structure corresponding to the second external tubular sleeve 3.
  • This fiber structure is then embedded in resin using known techniques, these fibers can be pre-impregnated with resin or not, then the resin is hardened in a manner known per se before the withdrawal of the mandrel.
  • a cylinder according to the invention may also include an internal tubular sleeve 9 and an external tubular sleeve 10 connected by a radial spacer 11 disposed in the plane of symmetry of the sleeves.
  • This spacer is always advantageously made in one piece with the sleeves, for example in fiber-reinforced resin.
  • the manufacturing method of this embodiment of the cylinder according to the invention consists in winding fibers around a first cylindrical cavity 12 so as to form the fiber structure of the first internal tubular sleeve 9, to be arranged around a portion from this first sleeve an imprint 13 comprising two mandrels 14 and 15 defining between them a free space determining the thickness and the height of the spacer, space in which fibers are wound so as to constitute the fiber structure of this spacer and finally to wind around these mandrels fibers so as to constitute the fiber structure of the second sleeve.
  • This fiber structure is embedded in resin, and this resin is then hardened, before the mandrels are removed.
  • FIG. 3 represents a third embodiment of a cy lindre according to the invention
  • this can also consist of a first internal tubular sleeve 16 around which is disposed a second external tubular sleeve 17 coaxial with the first, these sleeves being connected by several radial spacers, for example two 18 and 19 as shown in this figure.
  • These radial spacers can be arranged regularly along these sleeves so as to improve the mechanical strength of the cylinder.
  • the method of manufacturing this sleeve always consists in winding around a first cylindrical cavity 20 fibers so as to constitute the fiber structure of the first tubular sleeve 16, in having around this first structure a second cavity comprising two mandrels 21 and 22, delimiting between them a free space in which is placed a core 23 whose lateral faces delimit with the facing surfaces of the mandrels 21 and 22 respectively, two free spaces in which fibers are wound so as to constitute the fiber structures of the two spacers 18 and 19 and finally to wind fibers around the mandrels 21, 22 so as to constitute the fiber structure of the second external tubular sleeve 17.
  • the external and internal surfaces of the mandrels can be slightly conical so as to facilitate their removal from the cylinder after the resin has been hardened.
  • the or each free end of the cylinder for example 1 can also be provided with an end flange 24 thus blocking this end or each free end of the cylinder.
  • the cylinder according to the in-vention can be arranged around an expandable fixing shaft such as those manufactured for example by the company ACHARD-PICARD, REMY & Cie.
  • the ends of the internal sleeve are flared and adapted to cooperate with clamping corners on a support shaft.
  • This cylinder made in one piece for example by filament winding of glass fibers, or in other composite materials, can for different applications, be associated in its manufacture with other elements such as copper, aluminum, nickel or carbon.
  • a screened ink cylinder laser engraved, comprising glass fibers, a projection of ceramic on the external surface of the external sleeve and an etching of this ceramic layer.
  • a screened inking cylinder with traditional engraving comprising glass fibers on which copper is deposited which is engraved and then chromed.
  • a plate cylinder comprising glass fibers and a rubber coating if necessary.
  • a bubbler cylinder comprising glass fibers and a rubber coating.
  • a printing cylinder comprising glass fibers and an engraved and chromed copper coating.
  • a pressure cylinder comprising glass fibers and a rubber coating.
  • the cylinder according to the invention is therefore particularly well suited to the rotary printing sector, either in gravure printing or in flexography, for printing for example d food packaging. Indeed, these printing techniques require, for the different formats, a very frequent change of cylinders which are currently constructed of steel and which require for their handling motorized lifting means and a significant workforce.
  • the cylinder according to the invention a manufacturing cost much lower than those of the prior art, also has a much lower weight, which results in greater ease of operation for the establishment of this cylinder in the printing elements, greater ease of drive and therefore energy saving, the elimination in most cases of motorized lifting means specially adapted for this purpose, greater ease of storage, a possibility of re-use the cylinders and greater safety when handling them.
  • the cylinder according to the invention is fixed by corners on a drive shaft, these can cooperate with surfaces of complementary shape to the ends of the first internal sleeve.
  • the or each end flange is then fixed only on the outer sleeve so that only the inner sleeve tends to deform.
  • fibers of a material other than glass can also be used for the manufacture of a cylinder according to the invention.
  • the free spaces or cells defined between the sleeves and the spacers can be filled with an amorphous material of low density, such as for example an expanded material, making it possible to eliminate the phenomena of acoustic resonance and mechanical vibrations when the cylinder rotates. high speed.
  • an amorphous material of low density such as for example an expanded material

Abstract

This cylinder is characterised in that it comprises a first inner tubular sleeve (2) designed to interact with a supporting shaft and a second outer tubular sleeve (3) which is arranged around the first and is coaxial relative to this and the outer surface of which is designed for receiving a working coating, the two sleeves being connected by means of at least one radial spacer (4), and in that the first and second inner and outer tubular sleeves and the said at least one radial spacer are made of fibre-reinforced resin. <IMAGE>

Description

La présente invention concerne un cylindre notamment d'imprimerie et son procédé de fabrication.The present invention relates to a cylinder in particular for printing and its manufacturing process.

On connait déjà dans l'état de la technique des cylindres d'imprimerie constitués par des manchons tubulaires en acier dont les extrémités sont évasées pour coopérer avec des coins de fixation de ce cylin­dre sur un arbre d'entraînement.We already know in the prior art printing cylinders constituted by tubular steel sleeves whose ends are flared to cooperate with the fixing corners of this cylinder on a drive shaft.

Cependant, ces cylindres présentent un cer­tain nombre d'inconvénients.However, these cylinders have a number of drawbacks.

En effet, la fixation du cylindre étant réalisée par l'intermédiaire de coins, celui-ci a tendance à se déformer et afin d'éviter cette déforma­tion, on augmente la quantité de matière utilisée pour réaliser ces cylindres, ce qui augmente le prix de revient, le poids et donc les difficultés de manipula­tion et d'entraînement de ceux-ci.Indeed, the fixing of the cylinder being carried out by means of wedges, the latter tends to deform and in order to avoid this deformation, the quantity of material used to produce these cylinders is increased, which increases the price of returns, the weight and therefore the difficulties of handling and training thereof.

Le but de l'invention est donc de résoudre ces problèmes en proposant un cylindre notamment d'im­primerie qui soit extrêmement résistant à la déforma­tion et le plus léger possible.The object of the invention is therefore to solve these problems by proposing a cylinder in particular for printing which is extremely resistant to deformation and as light as possible.

A cet effet, l'invention a pour objet un cylindre notamment d'imprimerie, caractérisé en ce qu'il comprend un premier manchon tubulaire interne adapté pour coopérer avec un arbre de support et un second manchon tubulaire externe disposé autour du premier et coaxial à celui-ci, dont la surface exté­rieure est adaptée pour recevoir un revêtement de travail, les deux manchons étant reliés par au moins une entretoise radiale, et en ce que les premier et second manchons tubulaires interne et externe et la­dite au moins une entretoise radiale, sont en résine renforcée de fibres.To this end, the subject of the invention is a cylinder, in particular a printing cylinder, characterized in that it comprises a first internal tubular sleeve adapted to cooperate with a support shaft and a second external tubular sleeve arranged around the first and coaxial with the latter, the outer surface of which is adapted to receive a working coating, the two sleeves being connected by at least one radial spacer, and in that the first and second internal and external tubular sleeves and said at least one radial spacer, are made of fiber-reinforced resin.

Selon différents modes de réalisation, les premier et second manchons peuvent être reliés par plusieurs entretoises radiales.According to different embodiments, the first and second sleeves can be connected by several radial spacers.

Avantageusement, la ou chaque entretoise est d'une seule pièce avec les manchons.Advantageously, the or each spacer is in one piece with the sleeves.

Selon un autre aspect, l'invention a égale­ment pour objet un procédé de fabrication d'un cylin­dre tel que décrit précédemment, caractérisé en ce qu'on enroule des fibres autour d'une première em­preinte cylindrique de manière à former une première partie de structure de fibres correspondant au premier manchon interne, on dispose autour d'une portion de cette partie de structure, une seconde empreinte délimitant au moins un espace libre déterminant l'épaisseur et la hauteur de ladite au moins une entretoise radiale, dans lequel on enroule des fibres de manière à former une seconde partie de structure de fibres correspondant à l'entretoise et on enroule autour de cette seconde empreinte des fibres de manière à former une troisième partie de structure de fibres correspondant au second manchon externe.According to another aspect, the invention also relates to a method of manufacturing a cylinder as described above, characterized in that fibers are wound around a first cylindrical cavity so as to form a first part of structure of fibers corresponding to the first internal sleeve, there is around a portion of this part of the structure, a second imprint delimiting at least one free space determining the thickness and the height of said at least one radial spacer, in which are wound fibers so as to form a second part of fiber structure corresponding to the spacer and the fibers are wound around this second imprint so as to form a third part of fiber structure corresponding to the second outer sleeve.

L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :

  • - la Fig.1 illustre un procédé de fabrica­tion d'un premier mode de réalisation d'un cylindre selon l'invention;
  • - la Fig.2 illustre un procédé de fabrica­tion d'un second mode de réalisation d'un cylindre selon l'invention;
  • - la Fig.3 illustre un procédé de fabrica­tion d'un troisième mode de réalisation d'un cylindre selon l'invention; et
  • - la Fig.4 représente une vue en coupe d'un mode de réalisation d'un cylindre selon l'invention.
The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • - Fig.1 illustrates a method of manufacturing a first embodiment of a cylinder according to the invention;
  • - Fig.2 illustrates a method of manufacturing a second embodiment of a cylinder according to the invention;
  • - Fig.3 illustrates a method of manufacturing a third embodiment of a cylinder according to the invention; and
  • - Fig.4 shows a sectional view of an embodiment of a cylinder according to the invention.

Ainsi qu'on peut le voir sur la Fig.1 qui illustre le procédé de fabrication d'un premier mode de réalisation d'un cylindre selon l'invention, ce cylindre 1 comporte un premier manchon tubulaire interne 2 adapté pour coopérer avec un arbre de support et un second manchon tubulaire externe 3 disposé autour du premier manchon et coaxial à celui-­ci.As can be seen in Fig.1 which illustrates the method of manufacturing a first embodiment of a cylinder according to the invention, this cylinder 1 has a first internal tubular sleeve 2 adapted to cooperate with a shaft support and a second external tubular sleeve 3 disposed around the first sleeve and coaxial with it.

Comme cela sera décrit plus en détail par la suite, la surface extérieure du second manchon tubu­laire externe 3 est adaptée pour recevoir un revête­ment de travail et les manchons 2 et 3 sont reliés par au moins une entretoise radiale 4. Cette entretoise est avantageusement d'une seule pièce avec les man­chons et comme cela est représenté sur cette figure, cette entretoise peut être prévue à l'une des extré­mités des manchons.As will be described in more detail below, the external surface of the second external tubular sleeve 3 is adapted to receive a working covering and the sleeves 2 and 3 are connected by at least one radial spacer 4. This spacer is advantageously of one piece with the sleeves and as shown in this figure, this spacer can be provided at one of the ends of the sleeves.

Avantageusement, le cylindre selon l'inven­tion est constitué de résine renforcée de fibres, par exemple de verre. La structure de fibres de verre peut être réalisée par enroulement filamentaire, ce procédé étant illustré sur cette figure 1.Advantageously, the cylinder according to the invention consists of resin reinforced with fibers, for example glass. The glass fiber structure can be produced by filament winding, this process being illustrated in this figure 1.

Ce procédé consiste à enrouler autour d'une première empreinte tubulaire 5, des fibres de manière à former une première partie de structure de fibres correspondant au premier manchon tubulaire interne 2, à disposer autour d'une portion de cette première partie de structure de fibres, une seconde empreinte 6 comportant un mandrin tubulaire 7 et une bague d'arrêt 8, délimitant entre eux un espace libre déterminant l'épaisseur et la hauteur de l'entretoise radiale. On enroule ensuite des fibres dans cet espace libre de manière à former une seconde partie de structure de fibres correspondant à l'entretoise et enfin on enrou­ le autour de ce mandrin 7 des fibres de manière à former une troisième partie de structure de fibres correspondant au second manchon tubulaire externe 3.This process consists in winding around a first tubular impression 5, fibers so as to form a first part of fiber structure corresponding to the first internal tubular sleeve 2, to arrange around a portion of this first part of fiber structure , a second cavity 6 comprising a tubular mandrel 7 and a stop ring 8, delimiting between them a free space determining the thickness and the height of the radial spacer. We then wind fibers in this free space so as to form a second part of fiber structure corresponding to the spacer and finally we wind the around this mandrel 7 of the fibers so as to form a third part of the fiber structure corresponding to the second external tubular sleeve 3.

Cette structure de fibres est ensuite noyée dans de la résine en utilisant des techniques connues, ces fibres pouvant être préimprégnées de résine ou non, puis la résine est durcie de manière connue en soi avant le retrait du mandrin.This fiber structure is then embedded in resin using known techniques, these fibers can be pre-impregnated with resin or not, then the resin is hardened in a manner known per se before the withdrawal of the mandrel.

Comme on l'a représenté sur la Fig.2, un cylindre selon l'invention peut également comporter un manchon tubulaire interne 9 et un manchon tubulaire externe 10 reliés par une entretoise radiale 11 dispo­sée dans le plan de symétrie des manchons. Cette en­tretoise est toujours avantageusement réalisée d'une seule pièce avec les manchons par exemple en résine renforcée de fibres.As shown in Fig.2, a cylinder according to the invention may also include an internal tubular sleeve 9 and an external tubular sleeve 10 connected by a radial spacer 11 disposed in the plane of symmetry of the sleeves. This spacer is always advantageously made in one piece with the sleeves, for example in fiber-reinforced resin.

Le procédé de fabrication de ce mode de réalisation du cylindre selon l'invention consiste à enrouler des fibres autour d'une première empreinte cylindrique 12 de manière à former la structure de fibres du premier manchon tubulaire interne 9, à disposer autour d'une portion de ce premier manchon une empreinte 13 comportant deux mandrins 14 et 15 délimitant entre eux un espace libre déterminant l'épaisseur et la hauteur de l'entretoise, espace dans lequel on enroule des fibres de manière à constituer la structure de fibres de cette entretoise et enfin à enrouler autour de ces mandrins des fibres de manière à constituer la structure de fibres du second manchon.The manufacturing method of this embodiment of the cylinder according to the invention consists in winding fibers around a first cylindrical cavity 12 so as to form the fiber structure of the first internal tubular sleeve 9, to be arranged around a portion from this first sleeve an imprint 13 comprising two mandrels 14 and 15 defining between them a free space determining the thickness and the height of the spacer, space in which fibers are wound so as to constitute the fiber structure of this spacer and finally to wind around these mandrels fibers so as to constitute the fiber structure of the second sleeve.

Cette structure de fibres est noyée dans de la résine, et cette résine étant ensuite durcie, avant le retrait des mandrins.This fiber structure is embedded in resin, and this resin is then hardened, before the mandrels are removed.

Si l'on se reporte maintenant à la Fig.3 qui représente un troisième mode de réalisation d'un cy­ lindre selon l'invention, celui-ci peut également être constitué d'un premier manchon tubulaire interne 16 autour duquel est disposé un second manchon tubulaire externe 17 coaxial au premier, ces manchons étant re­liés par plusieurs entretoises radiales, par exemple deux 18 et 19 comme représenté sur cette figure.If we now refer to Fig. 3 which represents a third embodiment of a cy lindre according to the invention, this can also consist of a first internal tubular sleeve 16 around which is disposed a second external tubular sleeve 17 coaxial with the first, these sleeves being connected by several radial spacers, for example two 18 and 19 as shown in this figure.

Ces entretoises radiales peuvent être dispo­sées régulièrement le long de ces manchons de manière à améliorer la résistance mécanique du cylindre.These radial spacers can be arranged regularly along these sleeves so as to improve the mechanical strength of the cylinder.

Le procédé de fabrication de ce manchon con­siste toujours à enrouler autour d'une première em­preinte cylindrique 20 des fibres de manière à consti­tuer la structure de fibres du premier manchon tubu­laire 16, à disposer autour de cette première structu­re une seconde empreinte comportant deux mandrins 21 et 22, délimitant entre eux un espace libre dans lequel est placé un noyau 23 dont les faces latérales délimitent avec les surfaces en regard des mandrins 21 et 22 respectivement, deux espaces libres dans les­quels sont enroulées des fibres de manière à consti­tuer les structures de fibres des deux entretoises 18 et 19 et enfin à enrouler autour des mandrins 21 ,22 des fibres de manière à constituer la structure de fibres du second manchon tubulaire externe 17.The method of manufacturing this sleeve always consists in winding around a first cylindrical cavity 20 fibers so as to constitute the fiber structure of the first tubular sleeve 16, in having around this first structure a second cavity comprising two mandrels 21 and 22, delimiting between them a free space in which is placed a core 23 whose lateral faces delimit with the facing surfaces of the mandrels 21 and 22 respectively, two free spaces in which fibers are wound so as to constitute the fiber structures of the two spacers 18 and 19 and finally to wind fibers around the mandrels 21, 22 so as to constitute the fiber structure of the second external tubular sleeve 17.

Il est à noter que dans les trois modes de réalisation qui viennent d'être décrits, les surfaces extérieures et intérieures des mandrins peuvent être légèrement coniques de manière à faciliter leur re­trait du cylindre après que la résine ait été durcie.It should be noted that in the three embodiments which have just been described, the external and internal surfaces of the mandrels can be slightly conical so as to facilitate their removal from the cylinder after the resin has been hardened.

Comme on peut le voir plus particulièrement sur la Fig.4, la ou chaque extrémité libre du cylindre par exemple 1 peut également être munie d'un flasque d'extrémité 24 bouchant ainsi cette extrémité ou chaque extrémité libre du cylindre.As can be seen more particularly in FIG. 4, the or each free end of the cylinder for example 1 can also be provided with an end flange 24 thus blocking this end or each free end of the cylinder.

Il est à noter que le cylindre selon l'in-vention peut être disposé autour d'un arbre de fixation expansible comme ceux fabriqués par exemple par la société ACHARD-PICARD, REMY & Cie.It should be noted that the cylinder according to the in-vention can be arranged around an expandable fixing shaft such as those manufactured for example by the company ACHARD-PICARD, REMY & Cie.

Selon un autre mode de fixation, les ex­trémités du manchon interne sont évasées et adaptées pour coopérer avec des coins de serrage sur un arbre de support.According to another method of attachment, the ends of the internal sleeve are flared and adapted to cooperate with clamping corners on a support shaft.

Ce cylindre réalisé en une seule pièce par exemple par enroulement filamentaire de fibres de verre, ou en d'autres matériaux composites, peut pour différentes applications, être associé dans sa fabri­cation avec d'autres éléments tels que du cuivre, de l'aluminium, du nickel ou du carbone.This cylinder made in one piece for example by filament winding of glass fibers, or in other composite materials, can for different applications, be associated in its manufacture with other elements such as copper, aluminum, nickel or carbon.

En effet, dans le secteur de l'imprimerie en rotatif par exemple, il est possible d'obtenir par association d'un tel cylindre à différentes possibili­tés de revêtements extérieurs, les définitions sui­vantes :Indeed, in the rotary printing sector for example, it is possible to obtain, by association of such a cylinder with different possibilities of external coatings, the following definitions:

A) - Dans le domaine de la flexographie: A) - In the field of flexography:

- un cylindre encreur tramé, gravé au laser, comprenant des fibres de verre, une projection de céramique sur la surface extérieure du manchon externe et une gravure de cette couche de céramique.
- un cylindre encreur tramé avec gravure traditionnelle, comprenant des fibres de verre sur lesquelles est déposé du cuivre qui est gravé puis chromé.
- un cylindre porte-clichés comprenant des fibres de verre et un revêtement en caoutchouc si nécessaire.
- un cylindre barboteur comprenant des fi­bres de verre et un revêtement en caoutchouc.- a screened ink cylinder, laser engraved, comprising glass fibers, a projection of ceramic on the external surface of the external sleeve and an etching of this ceramic layer.
- a screened inking cylinder with traditional engraving, comprising glass fibers on which copper is deposited which is engraved and then chromed.
- a plate cylinder comprising glass fibers and a rubber coating if necessary.
- a bubbler cylinder comprising glass fibers and a rubber coating.

B) - Dans le domaine de l'héliogravure :B) - In the rotogravure domain:

- un cylindre imprimeur comprenant des fibres de verre et un revêtement en cuivre gravé et chromé.
- un cylindre presseur comprenant de fibres de verre et un revêtement en caoutchouc.- a printing cylinder comprising glass fibers and an engraved and chromed copper coating.
- a pressure cylinder comprising glass fibers and a rubber coating.

Par ses caractéristiques de résistance mé­canique très élevée et sa grande légèreté, le cylindre selon l'invention, est donc tout particulièrement bien adapté au secteur de l'imprimerie en rotatif, soit en héliogravure, soit en flexographie, pour l'impression par exemple d'emballages alimentaires. En effet, ces techniques d'impression imposent, pour les différents formats, un changement très fréquent de cylindres qui sont actuellement construits en acier et qui nêces­sitent pour leur manutention des moyens de levage motorisés et une main d'oeuvre importante.By its characteristics of very high mechanical resistance and its great lightness, the cylinder according to the invention is therefore particularly well suited to the rotary printing sector, either in gravure printing or in flexography, for printing for example d food packaging. Indeed, these printing techniques require, for the different formats, a very frequent change of cylinders which are currently constructed of steel and which require for their handling motorized lifting means and a significant workforce.

Le cylindre selon l'invention d'un coût de fabrication beaucoup moins élevé que ceux de l'état de la technique, présente de plus un poids beaucoup plus faible, ce qui entraîne une plus grande facilité de manoeuvre pour la mise en place de ce cylindre dans les éléments imprimeurs, une plus grande facilité d'entraînement et donc une économie d'énergie, la suppression dans la majorité des cas, des moyens de levage motorisés spécialement adaptés à cet effet, une plus grande facilité de stockage, une possibilité de réutiliser les cylindres et une plus grande sécurité lors de sa manipulation.The cylinder according to the invention, a manufacturing cost much lower than those of the prior art, also has a much lower weight, which results in greater ease of operation for the establishment of this cylinder in the printing elements, greater ease of drive and therefore energy saving, the elimination in most cases of motorized lifting means specially adapted for this purpose, greater ease of storage, a possibility of re-use the cylinders and greater safety when handling them.

Par ailleurs, il est extrêmement facile de régler le diamètre extérieur du manchon tubulaire externe lors de la fabrication du cylindre en utili­sant des mandrins déterminant une hauteur d'entretoise appropriée, ce qui permet d'ajuster le développement du cylindre.Furthermore, it is extremely easy to adjust the outside diameter of the external tubular sleeve during the manufacture of the cylinder using mandrels determining an appropriate spacer height, which makes it possible to adjust the development. of the cylinder.

Dans le cas où le cylindre selon l'invention est fixé par des coins sur un arbre d'entraînement, ceux-ci peuvent coopérer avec des surfaces de forme complémentaire des extrémités du premier manchon interne. Le ou chaque flasque d'extrémité est alors fixé uniquement sur le manchon externe de manière que seul le manchon interne ait tendance à se déformer.In the case where the cylinder according to the invention is fixed by corners on a drive shaft, these can cooperate with surfaces of complementary shape to the ends of the first internal sleeve. The or each end flange is then fixed only on the outer sleeve so that only the inner sleeve tends to deform.

Bien que l'on n'ait mentionné que des fibres de verre, des fibres d'un matériau autre que le verre peuvent également être utilisées pour la fabrication d'un cylindre selon l'invention.Although only glass fibers have been mentioned, fibers of a material other than glass can also be used for the manufacture of a cylinder according to the invention.

Enfin, les espaces libres ou alvéoles délimités entre les manchons et les entretoises peu­vent être remplis d'un matériau amorphe de faible densité, comme par exemple un matériau expansé, per­mettant d'éliminer les phénomènes de résonance acous­tique et les vibrations mécaniques lorsque le cylin­dre tourne à grande vitesse.Finally, the free spaces or cells defined between the sleeves and the spacers can be filled with an amorphous material of low density, such as for example an expanded material, making it possible to eliminate the phenomena of acoustic resonance and mechanical vibrations when the cylinder rotates. high speed.

Claims (9)

1. Cylindre notamment d'imprimerie carac­térisé en ce qu'il comprend un premier manchon tubu­laire interne (2; 9; 16) adapté pour coopérer avec un arbre de support et un second manchon tubulaire exter­ne (3; 10; 17) disposé autour du premier et coaxial à celui-ci, dont la surface extérieure est adaptée pour recevoir un revêtement de travail, les deux manchons étant reliés par au moins une entretoise radiale (4; 11; 18, 19), et en ce que les premier et second man­chons tubulaires interne et externe et ladite au moins une entretoise radiale, sont en résine renforcée de fibres.1. Cylinder, in particular for printing, characterized in that it comprises a first internal tubular sleeve (2; 9; 16) adapted to cooperate with a support shaft and a second external tubular sleeve (3; 10; 17) disposed around the first and coaxial therewith, the outer surface of which is adapted to receive a working coating, the two sleeves being connected by at least one radial spacer (4; 11; 18, 19), and in that the first and second internal and external tubular sleeves and said at least one radial spacer are made of fiber-reinforced resin. 2. Cylindre selon la revendication 1, carac­térisé en ce que ladite entretoise (4;11;18,19) est d'une seule pièce avec les manchons.2. Cylinder according to claim 1, characterized in that said spacer (4; 11; 18,19) is in one piece with the sleeves. 3. Cylindre selon la revendication 1 ou 2, caractérisé en ce que ladite entretoise (4) est prévue à l'une des extrémités des manchons (2,3).3. Cylinder according to claim 1 or 2, characterized in that said spacer (4) is provided at one of the ends of the sleeves (2,3). 4. Cylindre selon la revendication 1 ou 2, caractérisé en ce que ladite entretoise (11) est pré­vue dans le plan de symétrie des manchons (9,10).4. Cylinder according to claim 1 or 2, characterized in that said spacer (11) is provided in the plane of symmetry of the sleeves (9,10). 5. Cylindre selon la revendication 1 ou 2, caractérisé en ce que les manchons (16,17) sont reliés par plusieurs entretoises (18, 19).5. Cylinder according to claim 1 or 2, characterized in that the sleeves (16,17) are connected by several spacers (18, 19). 6. Cylindre selon la revendication 5, carac­térisé en ce que lesdites entretoises (18,19) sont régulièrement réparties suivant la longueur des manchons (16,17).6. Cylinder according to claim 5, characterized in that said spacers (18,19) are regularly distributed along the length of the sleeves (16,17). 7. Cylindre selon l'une quelconque des re­vendications précédentes, caractérisé en ce que la ou chaque extrémité libre du cylindre comporte un flasque d'extrémité (24).7. Cylinder according to any one of the preceding claims, characterized in that the or each free end of the cylinder comprises an end flange (24). 8. Cylindre selon l'une quelconque des re­ vendications précédentes, caractérisé en ce que les fibres sont des fibres de verre.8. Cylinder according to any of the re previous claims, characterized in that the fibers are glass fibers. 9. Procédé de fabrication d'un cylindre selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on enroule des fibres autour d'une première empreinte cylindrique (5; 12; 20) de manière à former une première partie de structure de fibres correspondant au premier manchon interne (2;9;16), on dispose autour d'une portion de cette partie de structure, une seconde empreinte (6,7,8; 13, 14,15; 21,22), délimitant au moins un espace libre déterminant l'épaisseur et la hauteur de ladite au moins une entretoise radiale, dans lequel on enroule des fibres de manière à former une seconde partie de structure de fibres correspondant à l'entretoise et on enroule autour de cette seconde empreinte des fibres de manière à former une troisième partie de structure de fibres correspondant au second manchon externe (3;10;17).9. A method of manufacturing a cylinder according to any one of the preceding claims, characterized in that fibers are wound around a first cylindrical cavity (5; 12; 20) so as to form a first part of the structure of fibers corresponding to the first internal sleeve (2; 9; 16), there is around a portion of this part of the structure, a second imprint (6,7,8; 13, 14,15; 21,22), delimiting at least one free space determining the thickness and the height of said at least one radial spacer, in which fibers are wound so as to form a second part of fiber structure corresponding to the spacer and it is wrapped around this second imprint fibers so as to form a third part of fiber structure corresponding to the second outer sleeve (3; 10; 17).
EP89402222A 1988-08-23 1989-08-04 Cylinder, particularly for a printing works Withdrawn EP0356293A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811129 1988-08-23
FR8811129A FR2635718A1 (en) 1988-08-23 1988-08-23 CYLINDER IN PARTICULAR FOR PRINTING

Publications (1)

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EP0356293A1 true EP0356293A1 (en) 1990-02-28

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EP89402222A Withdrawn EP0356293A1 (en) 1988-08-23 1989-08-04 Cylinder, particularly for a printing works

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EP (1) EP0356293A1 (en)
FR (1) FR2635718A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9208449U1 (en) * 1992-06-24 1992-09-17 Windmoeller & Hoelscher, 4540 Lengerich, De
CN101954778A (en) * 2009-07-13 2011-01-26 得克斯玛格销售有限责任公司 Low friction roller
CN110588139A (en) * 2019-09-29 2019-12-20 王育安 Printing rubber roller

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502022C (en) * 1930-07-26 Fallert & Co Akt Ges Form cylinder for rotogravure printing machines
US1787187A (en) * 1928-02-15 1930-12-30 Goss Printing Press Co Ltd Printing-press cylinder
US1802038A (en) * 1927-11-18 1931-04-21 Hoe & Co R Printing press
DE1229548B (en) * 1964-05-08 1966-12-01 Windmoeller & Hoelscher Format cylinder for printing machines and process for its production
DE1250838B (en) * 1967-09-28 Windmöller &. Hölscher, Lengerich (Westf.) Format cylinders for printing machines
US4178664A (en) * 1978-07-17 1979-12-18 Mcloughlin Nelson E Roller with replaceable sleeve
EP0243718A1 (en) * 1986-04-26 1987-11-04 INA Wälzlager Schaeffler KG Construction part made of an injected or moulded polymeric material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502022C (en) * 1930-07-26 Fallert & Co Akt Ges Form cylinder for rotogravure printing machines
DE1250838B (en) * 1967-09-28 Windmöller &. Hölscher, Lengerich (Westf.) Format cylinders for printing machines
US1802038A (en) * 1927-11-18 1931-04-21 Hoe & Co R Printing press
US1787187A (en) * 1928-02-15 1930-12-30 Goss Printing Press Co Ltd Printing-press cylinder
DE1229548B (en) * 1964-05-08 1966-12-01 Windmoeller & Hoelscher Format cylinder for printing machines and process for its production
US4178664A (en) * 1978-07-17 1979-12-18 Mcloughlin Nelson E Roller with replaceable sleeve
EP0243718A1 (en) * 1986-04-26 1987-11-04 INA Wälzlager Schaeffler KG Construction part made of an injected or moulded polymeric material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9208449U1 (en) * 1992-06-24 1992-09-17 Windmoeller & Hoelscher, 4540 Lengerich, De
CN101954778A (en) * 2009-07-13 2011-01-26 得克斯玛格销售有限责任公司 Low friction roller
CN101954778B (en) * 2009-07-13 2013-03-06 得克斯玛格销售有限责任公司 Low friction roll
CN110588139A (en) * 2019-09-29 2019-12-20 王育安 Printing rubber roller

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