EP3640031A1 - Cylinder with movable pin - Google Patents

Abstract

A cylinder (2) is provided, which is designed to receive one or more hollow cylinders on a lateral surface (12) of the cylinder (2). The cylinder (2) has at least one movable stop (1) with at least one movable element, the at least one movable element in a rest position not projecting beyond the lateral surface (12) of the cylinder (2) and allowing wooden cylinders to slide over it, and protrudes in an active position beyond the lateral surface (12) of the cylinder (2) and serves as a mechanical stop for hollow cylinders. Another aspect of the invention relates to a method for positioning a hollow cylinder on such a cylinder (2), ie Assembly / disassembly of a hollow cylinder on a bwz. of such a cylinder (2).

Description

The invention relates to a cylinder which is set up to receive one or more hollow cylinders on a lateral surface of the cylinder. Further aspects of the invention relate to an arrangement comprising such a cylinder and a hollow cylinder arranged thereon, and methods for positioning a wooden cylinder on the cylinder and for removing a wooden cylinder from the cylinder.

Introduction:

In the printing industry, sleeves and adapters are mostly used in the flexographic printing process. In flexographic printing, ink is transferred to a printing medium via a printing form by means of printing tension. In addition to gravure and gravure printing, it is one of the most important printing processes, particularly in the packaging industry. It is characterized by its elastic printing form and can therefore be used for printing on paper, foils and fiber materials. It can also be used for different color systems, which ensures a more universal application.

The different versions of flexographic printing machines are individually adapted for the respective area of application. They can be divided into the main groups of multi-cylinder and central cylinder printing presses. By using steel cylinders with different diameters, individual print reports can be achieved. In principle, adapters for bridging repeats are mounted on a steel cylinder. A sleeve is mounted on the adapter. A print form or cliché is applied to the sleeve in the so-called pre-assembly.

Description of the invention:

The invention is a cylinder or hollow cylinder on which it is possible to mount further hollow cylinders (e.g. sleeves) of different lengths in the correct position without the need for tools for changing the length or the general functions of the cylinder being adversely affected. In general, it is a simple system that can be implemented inexpensively without high follow-up costs for the customer. Another cost advantage for the customer is that such a cylinder is cheaper to buy than, for example, three cylinders of different lengths, but also eliminates storage costs. It is still possible to convert existing regular cylinders to this new type.

The multi-length cylinder, which can be used without tools, is characterized in addition to its stop change that can be carried out without tools, with the register accuracy remaining the same, in that it has at least one preinstalled movable element. In the rest position, the at least one movable element is located in a milled pocket below the cylinder surface in order to allow hollow cylinders to slide over it. In the active state, the at least one movable element is in an active position, in which it projects beyond the cylinder surface, and holds the hollow cylinder in position. The at least one movable element is therefore designed to be relatively stable. A transfer between the rest position and the active position can preferably take place by folding the at least one movable element. In addition to limiting the folding angle, an additional end stop can also serve to increase stability. Furthermore, the at least one movable element is preferably prevented by a locking device from changing the position independently without active intervention.

Accordingly, a cylinder is proposed which is set up to receive one or more hollow cylinders on a lateral surface of the cylinder. The cylinder has at least one movable stop with at least one movable element, the at least one movable element not projecting beyond the lateral surface of the cylinder in a rest position and allowing wooden cylinders to slide over it, and projecting beyond the lateral surface of the cylinder in an active position and as a mechanical one Stop for hollow cylinder is used. The cylinder can be a solid cylinder or a hollow cylinder, for example a pressure cylinder, a hollow cylinder or an adapter sleeve. The cylinder is preferably an adapter sleeve.

Such an adapter sleeve has a sleeve body which essentially corresponds to that of the adapter sleeves known from the prior art. The sleeve body has a tubular shape or a shape of a hollow circular cylinder and, viewed from the inside out, preferably comprises a deformable base sleeve, optionally a deformable intermediate layer and a cover layer. In particular, the base sleeve, the optional intermediate layer and the cover layer essentially correspond to those of the adapter sleeves of the prior art.

The deformable base sleeve can be constructed from one or more layers, preferably it consists of one layer. The deformable base sleeve can be made of a flexible ceramic layer, metal layer e.g. made of aluminum, nickel, a metal alloy or a reinforced or unreinforced plastic or combinations thereof. When using metals, alloys and ceramics, these are preferably in the form of a partial layer, in particular in the form of a perforated plate, a wire mesh or combinations of several of these materials. Reinforced plastics are preferably used, which are reinforced with fibers, fillers or combinations thereof. In particular, metal, glass and / or carbon fibers can be considered as fibers, but plastic fibers can also be used. Carbon fibers, glass fibers and / or plastic fibers are preferably used. For the plastic fibers, polyesters, polyamides and polyaramides are preferred. Fillers can be incorporated in the form of inorganic or organic particles. Among the inorganic fillers, carbonates, silicates, sulfates or oxides can be used, such as, for example, calcium carbonate or calcium sulfate, bentonites, titanium dioxide, silicon oxides, quartz or combinations thereof. Calcium carbonate, calcium sulfate, titanium dioxide and silicon dioxide are preferred. The reinforcement is preferably carried out by means of fibers, particularly preferably by means of glass and / or carbon fibers. These can be used in the form of woven fabrics, nonwovens, different layers of mostly parallel fibers or combinations thereof.

Suitable plastics or plastic mixtures are those which have a glass transition temperature above 50 ° C., preferably above 70 ° C., particularly preferably above 80 ° C. In order to make the production of the base sleeve simple, preference is given to using thermally and / or UV-curable mixtures with which the fibers are impregnated in such a way that they are embedded in the plastic matrix. Epoxy, unsaturated polyester-styrene mixtures, polyesters, polyethers and polyurethanes are preferably used as thermally curable mixtures. Epoxides and unsaturated polyester-styrene mixtures are preferably used. Both hard and deformable materials are used as an optional deformable intermediate layer, which can preferably be deformed and then return to their original shape, that is to say have a resilience. Various polymers such as natural and synthetic rubbers, elastomers and foams can be used for this. The foams can have open or closed pores or combinations thereof. Closed pores are preferably used. The foams are made from polymers such as polyethylene, polypropylene, polystyrene, polyester and polyurethane. A polyurethane foam is preferably used as the foam.

Hard materials, preferably metals, alloys, ceramics, glasses, polymers such as, for example, polyethers, polyesters, polyurethanes, epoxies and generally fiber-reinforced or foamed plastics and combinations thereof are used for the cover layer, and polyurethanes are very particularly preferred. The surface of the cover layer can be rough or smooth, preferably it is as smooth as possible in order to allow hollow cylinders to slide on easily. The cover layer is preferably dimensionally stable or hard.

The materials of the layers are preferably selected so that they are so impermeable to gases that a pressure build-up is possible and the pressure can be maintained over a period of several days or hours. In some cases it may also be necessary to make the layers electrically conductive (see for example EP1346846A1 , EP1144200A1 , EP2051856A1 EP1263592A1 ) to avoid electrostatic charges.

The thickness of the base layer is in the range from 0.3 mm to 8 mm, preferably in the range from 0.5 mm to 5 mm, particularly preferably in the range from 2.9 mm to 4.5 mm. The thickness of the optional intermediate layer is in the range from 0.2 mm to 125 mm, preferably in the range from 10 mm to 100 mm. The thickness of the cover layer is in the range from 0.5 mm to 10 mm, preferably in the range from 1 mm to 3 mm, the wall thickness of the adapter sleeve is in the range from 8 mm to 150 mm, preferably in the range from 15 mm to 75 mm. The wall thickness of the adapter sleeve is the sum of the wall thicknesses of all layers of the sleeve.

The inner diameter of the adapter sleeve according to the invention is in the range from 10 mm to 1000 mm, preferably in the range from 40 mm to 630 mm, particularly preferably in the range from 85 mm to 275 mm. The outside diameter of the invention Adapter sleeve is in the range from 20 mm to 2000 mm, preferably in the range from 100 mm to 700 mm, particularly preferably in the range from 125 mm to 300 mm.

The adapter sleeve can have one or more gas inlets and outlets that are connected to a gas distribution system. Such an adapter sleeve is made of, for example EP 3 243 660 B1 known.

The gas inlet (s) are connected to one or more gas distribution systems which distribute the gas in the adapter sleeve. The gas distribution system can consist of channels or hoses which run in or between the base and cover layers, in one or more intermediate layers, between different layers or combinations thereof. The first gas distribution system is preferably designed in the form of one or more channels which are introduced into the surface or the core of a layer, for example by drilling, milling, engraving, machining, cutting or combinations thereof. The gas distribution system is connected to one or more gas outlets which open on an outer surface and thus on the surface of the cover layer. The gas outlets can be designed in the form of one or more round, slit-shaped or angular openings in the cover layer or as a porous material or a material with a high proportion of openings. A gas outlet is located along the longitudinal direction of the adapter sleeve, preferably in the first third of one side of the adapter sleeve, and this side is preferably the side facing an operator. In a further embodiment, a gas distribution system can have at least one cavity which is set up to transmit pressure from the inside to the deformable base sleeve when a gas under pressure is applied such that the inner diameter of the sleeve body is deformed at least in a partial area of the adapter sleeve the base sleeve is reduced.

In one embodiment of the adapter sleeve, a gas connection is arranged as a gas inlet on an end face of the adapter sleeve. In this case, the adapter sleeve is supplied with gas in such a way that it can also be pushed onto another cylinder, such as, for example, a printing form cylinder, which does not provide any gas for forming a gas cushion. The gas connection can be designed in the form of a quick coupling, a gas olive, a pipe or a pipe in connection with a hose with a clamp. The gas connection is preferably a quick coupling.

In a further embodiment of the adapter sleeve, the at least one gas inlet is arranged on the inside of the sleeve body and is designed for connection to gas outlets on the outer lateral surface of another cylinder, for example a printing form cylinder. With this arrangement, it is possible for gas that is made available by the other cylinder, for example a printing form cylinder, to which the adapter sleeve is applied, to reach the surface of the adapter sleeve and to be used for mounting one or more further hollow cylinders.

The gas inlet attached to the inside of the sleeve body and thus to the base layer of the sleeve body serves to admit gas into the adapter sleeve which is made available by the other cylinder onto which the adapter sleeve is to be pushed. The gas inlet can be designed in the form of one or more round, slot-shaped or angular openings in the cover layer or as a porous material or as a material with a high proportion of openings.

When viewed along the longitudinal direction of the adapter sleeve, the gas inlet is preferably in the first third of one side of the adapter sleeve and this side is preferably the side facing an operator.

The adapter sleeve preferably comprises a gas control unit which is set up to enable and / or block the flow of gas from the gas inlet to the gas distribution systems.

Different settings of the gas control unit make it possible to direct the gas in a targeted manner and thus generate different functions. This makes it possible to push the adapter sleeve onto a cylinder with or without its own gas supply, to install a further hollow cylinder on the adapter sleeve or to clamp it on an existing other cylinder, for example a printing form cylinder.

The gas control unit can consist of one or more components and can both be integrated in the adapter sleeve and be arranged outside the adapter sleeve. The gas control unit is preferably arranged within the adapter sleeve.

The gas outlet is preferably designed as circumferentially arranged bores or circumferentially arranged gas-permeable porous areas. Axial porous areas are also possible.

The gas outlets can be in the form of one or more round, slit-shaped or angular openings or bores in the cover layer or in the base layer. However, the openings can also be designed in the form of porous regions which are inserted into the cover layer or into the base layer and possibly into the intermediate layer and comprise porous materials. Porous materials are understood to mean materials in which the pores have a volume fraction in the range from 1% and 50%, particularly preferably in the range from 5 to 40% and very particularly preferably in a range from 10% to 30% of the material. The percentage is based on the volume fraction of the pores in the volume of the entire porous material. The pore size is in the range from 1 μm to 500 μm, preferably from 2 to 300 μm, preferably from 5 to 100 μm and very particularly preferably from 10 μm to 50 μm. The pores are preferably homogeneously distributed over the volume of the porous material. Examples of such materials are foamed materials with open cells or sintered porous materials.

The porous region is preferably divided into one porous region or over several porous regions. In this case, a porous area is preferably designed as a ring encircling the circumferential direction, or a porous area comprises a plurality of partial areas which are designed and arranged in the form of an interrupted ring encircling the circumferential direction. Alternatively or additionally, at least one porous area can be provided in the form of one or more axially extending strips. The use of porous materials has the advantages that less gas is used and noise pollution is reduced.

In order to ensure exact and repeatedly adjustable positioning of different hollow cylinders when applying hollow cylinders to the cylinder according to the invention, at least one movable stop with at least one movable element is used, which fulfills different functions in at least two positions. In an active position, the at least one movable element protrudes beyond the lateral surface and stops a movement of the hollow cylinder and serves as a mechanical stop. In a rest position, the at least one movable element is located inside or below the lateral surface of the cylinder and allows a hollow cylinder to slide over it and in this case permits a different positioning.

The at least one movable element is preferred as a pin with a circular, elliptical, square, triangular, rectangular or polygonal Cross-section designed. However, other shapes can also be used, for example an element which has an arc shape on one side which corresponds to the shape of the surface of the jacket, so that a more or less gapless surface is present in the rest position.

The at least one movable element can preferably be transferred from the rest position into the active position and vice versa by means of a rotary movement or a translational movement.

When using at least one rotatable movable element, it is preferably rotatable about an axis of rotation which is perpendicular to a longitudinal axis of the cylinder. However, it is also possible to arrange the axis of rotation at a different angle. If the axis of rotation runs parallel to the cylinder axis, it is possible to design the movable element so that it forms a more or less seamless, uniform surface with the outer surface of the cylinder in the rest position. In particular, in the case of an elongated movable element, such as a pin, it is also preferred that the movable element is supported in such a way that a longitudinal axis of the movable element is aligned radially to the cylinder when the movable element is in the active position.

A fastening part can be used to connect the at least one movable element, which preferably comprises the movable element and means for transferring the movable element from the rest position into the active position and vice versa. The fastening part is preferably integrally, non-positively and / or positively connected to the cylinder, a positioning part possibly being inserted between the fastening part and the cylinder. The fastening part is fastened to the cylinder by means of connecting elements such as at least one screw, rivet or to the cylinder by means of gluing; Welding, magnetism or press fit connected in a recess in the surface of the cylinder.

The fastening part is preferably connected to the cylinder via a positioning part. For this purpose, the positioning part preferably comprises fastening points into which fastening means engage for connection to the fastening part. The positioning part is, for example, integrally, non-positively and / or positively connected to the cylinder. The positioning part is fastened to the cylinder by means of connecting elements such as at least one screw, rivet or is glued to the cylinder; Welding, magnetism or press fit connected in a recess in the surface of the cylinder.

The fastening part and the positioning part, if present, are embedded in a recess or a pocket in the surface of the cylinder, so that the fastening part or the positioning part does not hinder the sliding of hollow cylinders when the at least one movable element is in the rest position . The recess preferably has a depth in the range from 0.5 mm to 20 mm as seen from the surface, that is to say the lateral surface. The area of the depression is preferably adapted to the size of the movable element or elements which are received by the depression. It is preferred if the shape and size of the depression is selected such that a surface of the movable element, when it is in the rest position, merges seamlessly into the outer surface. In this context, a transition is considered to be seamless if a gap that may be present between a surface of the movable element and the lateral surface is less than 1 mm. Furthermore, the recess can be made larger than the movable element in at least one location in order to provide a recessed grip for manual actuation of the movable element.

A rotatable movable element, such as a movable pin, is preferably mounted in a fastening part by means of a bolt. In this case, either the bolt can be fixedly connected to the movable element and the bolt can be movably mounted in the fastening part or, conversely, the movable element can be movably supported relative to the bolt and the bolt can be fixedly connected to the fastening part. Alternatively, the bolt can be movably supported in the fastening part and the movable element can also be movably supported on the bolt.

The connection between the at least one movable element and the cylinder is preferably designed to be detachable. For this purpose, for example, the fastening part and / or the positioning part is fastened to the cylinder with releasable fastening means such as screws. This makes it possible to replace individual movable elements or parts thereof, such as a positioning part, a fastening part, a bolt, a pressure piece or parts thereof, if necessary.

The cylinder preferably has at least one immovable stop with at least one immovable element which projects beyond the circumferential surface and which as mechanical stop for hollow cylinders. This immovable stop is used in particular when a change in the position of the hollow cylinder on the cylinder is not necessary for the positioning of hollow cylinders. The immovable stop with the at least one immovable element can be used, for example, in an area at the end of the cylinder in order to prevent the hollow cylinder from being displaced beyond the edge of the cylinder and can serve as a safety measure.

The at least one immovable element is preferably designed as a pin, as a raised edge, as a segment of a raised edge, as a raised ring or as a segment of a raised ring. Furthermore, combinations with a recess, for example in the form of a circumferential groove, an interrupted circumferential groove, one or more bores, with corresponding counterparts in the slide-on hollow cylinder can be used, corresponding counterparts being arranged in a slide-on hollow cylinder. Retractable elements, pins, springs, stop edges or combinations thereof, for example, can be used as counterparts in the slide-on hollow cylinder.

The at least one movable element is preferably designed as a pin, as a segment of a raised ring, or as a segment of a raised edge. In the case of a segment of an elevated ring or an elevated edge, the at least one movable element is preferably designed such that the outer radius of the segment corresponds to that of the cylinder, so that a more or less gapless surface is present in the rest position.

An end stop is preferably provided for the at least one movable element, which defines the exact position and / or orientation of the movable element at least in the active position. For example, an end stop is provided for a rotatable movable element, such as a rotatably mounted pin, which limits a rotational movement in such a way that a rotational movement starting from the rest position in the direction of the active position ends in a position in which a longitudinal axis of the movable element is radial to Cylinder is aligned. In the event that the axis of rotation of the element is arranged perpendicular to the cylinder axis, the longitudinal axis of the movable element in the active position deviates in the axial direction by less than 30 ° beyond the 90 ° position, preferably by less than 20 °, particularly preferably by less than 10 °, very particularly preferably by less than 5 ° and extremely preferably by less than 1 °. A longitudinal axis of the at least one preferably gives way movable element in the active position by less than 30 ° from an orientation perpendicular to the longitudinal axis of the cylinder. This can be accomplished, for example, by providing a corresponding end stop in a fastening part, which stops the movement of the movable element beyond the 90 ° position. One possibility is, for example, a correspondingly positioned bolt or stop edge, screw, or comparable combinations.

In the event that the axis of rotation of the at least one movable element is arranged parallel to the cylinder axis, there is also a deviation from the radial arrangement by up to 60 °, preferably by up to 50 °, particularly preferably by up to 30 °, very particularly preferably by up to 20 °, can be used in both directions.

In order to achieve a sufficient stop effect, the at least one movable element should protrude beyond the outer surface of the cylinder in the active position. The at least one movable element preferably projects in the active position and / or the at least one immovable element in the range from 0.1 mm to 100 mm, preferably in the range from 0.1 to 10 mm, particularly preferably in the range from 0.1 to 5 mm and very particularly preferably in the range of 0.1 to 3 mm beyond the surface of the cylinder.

In order to achieve a particularly stable stop effect, several movable or immovable elements can be arranged on the cylinder in a movable or immovable stop. The at least one movable stop comprises a circumferential line around the circumferential surface of the cylinder distributed in the range of two to ten movable elements and / or the at least one immovable stop comprises along the circumferential line around the circumferential surface of the cylinder in the range of two to ten immovable elements . Preferably 2 to 8 movable or immovable elements are used, particularly preferably 2 to 6 movable or immovable elements, very particularly preferably 2 to 4 movable or immovable elements and especially 2 movable or immovable elements. The distribution along the circumferential line can take place at irregular or regular intervals or combinations thereof. The circumferential line is preferably oriented such that, seen along a longitudinal axis of the cylinder, all movable or immovable elements are at the same height.

In order to be able to position as many different hollow cylinders as possible, it is possible to use several movable or immovable stops. These movable or immovable stops can in turn comprise one or more movable or immovable elements. Therefore, at least two movable stops or at least one immovable stop and one movable stop are preferably arranged on the lateral surface over the length of the cylinder. The movable or immovable elements of the stops can be arranged in a line that runs parallel or at any angle to the cylinder axis or completely arbitrarily. A linear arrangement is preferably selected. It is also possible to distribute two or more movable or immovable elements along a circumferential line around the circumferential surface of the cylinder and to combine further elements with a linear or any arrangement. A non-linear arrangement of at least two movable elements is particularly advantageous if the distance between the stop positions along the line running parallel to the cylinder axis is smaller than the length of the fastening part. The number of movable or immovable elements is not limited and depends on the number of desired stops.

The at least one movable element and / or the at least one immovable element is preferably made of a material which is selected from a metal, an alloy, a plastic, a fiber-reinforced plastic, a ceramic and a glass. A metal, an alloy or a hard plastic is preferably used. In particular, steels, stainless steels, reinforced hard plastics and combinations thereof are used. In particular, the same materials as for the surface of the cylinder are suitable for the at least one movable or immovable element.

In order to prevent undesired changes in the position of the movable element, it is advantageous if a corresponding device prevents this. The cylinder therefore preferably further comprises at least one locking device which is set up to fix the at least one movable element in the active position and / or in the rest position. If a locking device is used, part of the locking device, such as a resilient pressure piece, can be arranged on the positioning part, the counterpart of the locking device preferably being located directly on the movable element. The locking device preferably comprises a resilient pressure piece, a spring (sheet), a spiral spring, a compressible plastic, rubber, gel and combinations thereof. A resilient pressure piece or a spring (sheet metal) is preferably used as the locking device.

The resilient pressure piece preferably has a spherical head which is set up to act on the movable element. Accordingly, the movable element is preferably provided with a corresponding counterpart for the spherical head, for example the movable element has a depression at the end oriented in the active position relative to the cylinder axis, which is preferably spherical.

In order to move the at least one movable element between the active position and the rest positions, all methods known to the person skilled in the art can be used, such as pneumatic, electrical, magnetic, mechanical or manual methods. The at least one movable element preferably comprises means for pneumatic movement, an electric drive or means for manual movement. The means for pneumatic movement are designed, for example, as a pneumatic cylinder. An electric drive is designed, for example, as an electric motor, such as a servo motor, or an electromagnet, which acts on the movable element. Means for manual movement are, for example, recessed grips in the lateral surface of the cylinder and / or depressions in a fastening part used for mounting the movable element, which support the gripping of the movable element. Additionally or alternatively, the means for manual movement can comprise handles with which the movable element can be gripped and moved manually.

If the cylinder is designed as an adapter sleeve or a printing form cylinder with a gas connection, the gas can be routed to pneumatic cylinders via a gas distribution system. By correspondingly controlling the gas distribution system, the movable elements of a movable stop of the cylinder can then be moved specifically into the active position or the rest position.

The proposed modular construction of the cylinder with movable elements also allows existing cylinders to be easily retrofitted with such a movable stop. For this purpose, one or more depressions are created in the lateral surface of the cylinder and a movable element is arranged in the depression and connected to the cylinder.

1. a. Bereitstellen eines Zylinders,
2. b. Erzeugen mindestens einer Vertiefung in der Mantelfläche des Zylinders,
3. c. Bereitstellen mindestens eines beweglichen Elements und
4. d. Befestigen des mindestens einen beweglichen Elements an dem Zylinder in der mindestens einen Vertiefung.

A method for producing one of the cylinders according to the invention described herein is proposed, comprising the steps:

1. a. Providing a cylinder,
2. b. Creating at least one depression in the lateral surface of the cylinder,
3. c. Providing at least one movable element and
4. d. Attaching the at least one movable element to the cylinder in the at least one recess.

The at least one depression can be produced, for example, by milling. A separate depression is preferably produced for each movable element. Alternatively, it is conceivable to arrange several movable elements together in one depression. For example, all movable elements of a movable stop can be arranged in a single depression, which is designed in the form of a circumferential groove.

A fastening part can optionally be used, which can contain the movable element and corresponding movement possibilities. The fastening part is preferably connected to the cylinder in a cohesive, non-positive and / or form-fitting manner, wherein a positioning part can optionally be inserted between the fastening part and the cylinder. The fastening part is fastened to the cylinder, for example, by means of connecting elements such as at least one screw, rivet or to the cylinder by means of gluing; Welding, magnetism or press fit connected in a recess in the surface of the cylinder.

The fastening part is preferably connected to the cylinder via a positioning part. For this purpose, the positioning part preferably comprises fastening points into which fastening means can engage for connection to the fastening part. The positioning part can, for example, be connected to the cylinder in a cohesive, non-positive and / or positive manner. The positioning part is fastened to the cylinder, for example, by means of connecting elements such as at least one screw, rivet, or to the cylinder by means of gluing; Welding, magnetism or press fit connected in a recess in the surface of the cylinder. The positioning part can be produced by means of all common processes, preferably it is produced in an additive process.

The cylinder according to the invention described above is suitable for a large number of uses, in particular in the field of assembly and the processing of cylinders and hollow cylinders, as is often the case in the field of printing. The cylinder according to the invention is therefore preferred as an assembly cylinder for machining Hollow cylinders or designed as an adapter cylinder for the assembly of hollow cylinders, in particular pressure sleeves.

Another aspect of the invention relates to an arrangement of cylinders containing one of the cylinders according to the invention described above, at least one further hollow cylinder being arranged on the cylinder according to the invention and at least one edge of the further hollow cylinder touching a movable element of the cylinder according to the invention in the active position. The cylinder according to the invention with movable elements is, for example, an assembly cylinder for processing hollow cylinders, a printing cylinder or an adapter cylinder for mounting printing sleeves on a printing cylinder. The further hollow cylinder is, for example, a printing sleeve, a printing sleeve precursor (sleeve) or a core for rolls that can be loaded with sheet-like materials.

1. a. Bereitstellen eines erfindungsgemäßen Zylinders,
2. b. Bereitstellen eines weiteren Hohlzylinders,
3. c. Einstellen eines ausgewählten beweglichen Anschlags durch Bewegen mindestens eines beweglichen Elements des beweglichen Anschlags in die Aktivposition und gegebenenfalls Bewegung von beweglichen Elementen nicht ausgewählter beweglicher Anschläge in die Ruheposition,
4. d. Aufbringen des weiteren Hohlzylinders auf dem erfindungsgemäßen Zylinder, wobei der weitere Holzylinder über eine Mantelfläche des erfindungsgemäßen Zylinders geschoben wird, bis eine Kante des weiteren Hohlzylinders mindestens ein bewegliches Element des ausgewählten beweglichen Anschlags berührt.

Another aspect of the invention relates to a method for positioning a hollow cylinder on a cylinder according to the invention, comprising the steps:

1. a. Providing a cylinder according to the invention,
2. b. Providing another hollow cylinder,
3. c. Setting a selected movable stop by moving at least one movable element of the movable stop into the active position and possibly moving movable elements of non-selected movable stops into the rest position,
4. d. Applying the further hollow cylinder to the cylinder according to the invention, the further wooden cylinder being pushed over a lateral surface of the cylinder according to the invention until an edge of the further hollow cylinder touches at least one movable element of the selected movable stop.

The cylinder according to the invention in the method can be an assembly cylinder for machining hollow cylinders, a printing cylinder or an adapter cylinder for mounting printing sleeves on a printing cylinder. The further hollow cylinder can be, for example, a printing sleeve, a printing sleeve precursor, a sleeve, a core for rolls that can be loaded with sheet-like materials, or combinations thereof. The cylinder according to the invention is preferably an adapter cylinder and the further hollow cylinder is a pressure sleeve or a pressure sleeve precursor.

In step d. The application of the further hollow cylinder can be facilitated by generating a gas cushion between the cylinder and the hollow cylinder. This is made possible by supplying the cylinder with gas and corresponding gas outlet openings in the cylinder surface. As an alternative or in addition, an air guide system can be provided in the hollow cylinder, which has openings on the inside facing the cylinder, through which air can flow and where it can generate an air cushion. The hollow cylinder can then be fixed on the cylinder, for example by interrupting the gas supply, as a result of which the gas cushion disappears and the hollow cylinder is fastened. Another possibility is to equip the hollow cylinder with a fastening mechanism and then to use it. Such a fastening mechanism is, for example, hydraulic or pneumatic clamping of the hollow cylinder or the use of locking screws. After the further hollow cylinder has been positioned, the arrangement can be used, for example, for flexographic printing, letterpress printing, gravure printing or pad printing.

Following the fixing of the hollow cylinder, further process steps can be carried out, such as rotating, machining, cleaning, or positioning the arrangement. Processing can in turn include several steps and for example milling, grinding, treatment with liquids, gases or plasma, treatment with electromagnetic waves, corna treatment, or gluing, e.g. with adhesive tape and other layers such as printing plates. In particular, the following treatments are possible: ablation of a part of the surface by means of laser radiation, application of colors and transferring it to a substrate, covering the hollow cylinder with sheet-like materials while forming a roll, covering the hollow cylinder with further layers and their fixing or combinations thereof.

1. a. Bereitstellen einer Anordnung enthaltend einen erfindungsgemäßen Zylinder, wobei mindestens ein weiterer Hohlzylinder auf dem erfindungsgemäßen Zylinder angeordnet ist und wobei mindestens eine Kante des weiteren Hohlzylinders ein bewegliches Element des erfindungsgemäßen Zylinders in Aktivposition berührt,
2. b. Abnehmen des weiteren Hohlzylinders durch herunterschieben des weiteren Hohlzylinders von der Mantelfläche des erfindungsgemäßen Zylinders,
3. c. Einstellen eines ausgewählten beweglichen Anschlags durch Bewegen mindestens eines beweglichen Elements des beweglichen Anschlags in die Ruheposition.

Another aspect of the invention relates to a method for dismantling one of the described arrangements, which comprises a cylinder according to the invention and a further hollow cylinder, comprising the steps:

1. a. Provision of an arrangement comprising a cylinder according to the invention, at least one further hollow cylinder being arranged on the cylinder according to the invention and at least one edge of the further hollow cylinder touching a movable element of the cylinder according to the invention in the active position,
2. b. Removing the further hollow cylinder by pushing the further hollow cylinder down from the outer surface of the cylinder according to the invention,
3. c. Setting a selected movable stop by moving at least one movable element of the movable stop into the rest position.

The cylinder according to the invention in the method can be, for example, an assembly cylinder for machining hollow cylinders, a printing cylinder or an adapter cylinder for mounting printing sleeves on a printing cylinder. The further hollow cylinder can be, for example, a printing sleeve, a printing sleeve precursor, a sleeve or a core for rolls that can be loaded with sheet-like materials. The cylinder according to the invention is preferably an adapter cylinder and the further hollow cylinder is a pressure sleeve or a pressure sleeve precursor.

In step b. The removal of the further hollow cylinder can be facilitated by generating a gas cushion between the cylinder according to the invention and the further hollow cylinder. This is made possible by a gas supply to the cylinder according to the invention and corresponding gas outlet openings in the cylinder surface.

Brief description of the figures

• Figur 1a einen Querschnitt durch den Zylinder mit beweglichem Anschlag in Ruheposition
• Figur 1b einen Querschnitt durch den Zylinder mit beweglichem Anschlag in Aktiv-Position
• Figur 2a Detailzeichnung des beweglichen Anschlages in Ruheposition im Längsschnitt
• Figur 2b) Detailzeichnung des beweglichen Anschlags in Aktiv-Position im Längsschnitt, und
• Figur 3 Zylinder mit mehreren beweglichen Anschlägen mit jeweils verschiedener Anordnung der Drehachse des beweglichen Anschlages.

Show it:

• Figure 1a a cross section through the cylinder with a movable stop in the rest position
• Figure 1b a cross section through the cylinder with a movable stop in the active position
• Figure 2a Detailed drawing of the movable stop in the rest position in longitudinal section
• Figure 2b ) Detailed drawing of the movable stop in active position in longitudinal section, and
• Figure 3 Cylinder with several movable stops, each with a different arrangement of the axis of rotation of the movable stop.

• In den Figuren 1a und 1b ist jeweils einen Querschnitt durch einen Zylinder 2 mit einem beweglichem Anschlag 1 dargestellt.
• Figur 1a zeigt den beweglichen Anschlag 1 in einer Ruheposition. Figur 1b zeigt den beweglichen Anschlag 1 und in einer Aktiv-Position. In der Ruheposition verschwindet ein Pin 11 als bewegliches Element des beweglichen Anschlags 1 in einer Vertiefung 10, vergleiche Figuren 2a und 2b, in der Oberfläche des Zylinders 2 und erlaubt ein Darübergleiten eines Hohlzylinders. In der in Figur 1b dargestellten Aktiv-Position ragt der Pin 11 des beweglichen Anschlags 1 über die Zylinderoberfläche hinaus und stoppt einen Hohlzylinder in der gewünschten Position.
• Figur 2 zeigt Details in einem Längsschnitt durch den beweglichen Anschlag 1. Dabei ist der bewegliche Anschlag 1 mit einem Befestigungsteil 3 in einer Vertiefung 10 des Zylinders 2 mittels Verbindungselementen 5 montiert. Die Verbindungselemente 5 sind in der in der Figur 2 dargestellten Ausführungsform als Schrauben ausgestaltet, welche in Gewindebohrungen 9 in der Vertiefung 10 eingreifen. Das Befestigungsteil 3 weist eine Drehachse 7 auf, an der der Pin 11 befestigt ist und welche ein Bewegen des Pins 11 des beweglichen Anschlages 1 von einer Ruhe- in eine Aktiv-Position und zurück erlaubt.

Figure description:

• In the Figures 1a and 1b a cross section through a cylinder 2 with a movable stop 1 is shown.
• Figure 1a shows the movable stop 1 in a rest position. Figure 1b shows the movable stop 1 and in an active position. In the rest position, a pin 11 disappears as a movable element of the movable stop 1 in a recess 10, cf. Figures 2a and 2b , in the surface of the cylinder 2 and allows a hollow cylinder to slide over it. In the in Figure 1b shown active position, the pin 11 of the movable stop 1 protrudes beyond the cylinder surface and stops a hollow cylinder in the desired position.
• Figure 2 shows details in a longitudinal section through the movable stop 1. The movable stop 1 with a fastening part 3 is mounted in a recess 10 of the cylinder 2 by means of connecting elements 5. The connecting elements 5 are in the Figure 2 embodiment shown designed as screws which engage in threaded bores 9 in the recess 10. The fastening part 3 has an axis of rotation 7 to which the pin 11 is fastened and which allows the pin 11 of the movable stop 1 to be moved from a rest position into an active position and back.

In the in the Figures 2a and 2b In the illustrated embodiment, the movable stop 1 comprises a positioning part 4 with a locking device 6, which prevents the pin 11 from being moved unintentionally. The locking device 6 is in the in Figures 2a and 2b embodiment shown designed as a resilient pressure piece which is arranged on the positioning part 4. A counterpart in the form of a depression in which the pressure piece can engage is arranged directly on pin 11. In an alternative embodiment, the positioning part 4 can be dispensed with.

In Figure 3 A cylinder 2 is shown, on which three different movable stops 1 are arranged by way of example. The three movable stops 1 are arranged distributed over the length of the cylinder 2 and, in the example of FIG Figure 3 different arrangements of the axis of rotation 7. In the case of a first movable stop 1a, the axis of rotation 7 is arranged such that it forms an angle of 0 ° with the longitudinal axis 8 of the cylinder 2 (parallel arrangement). With a second movable stop 1b and a third movable stop 1c, the respective axes of rotation 7 and the longitudinal axis 8 of the cylinder 2 an angle of 90 ° or 270 ° (vertical arrangements). All other angles in between are also possible. If a hollow cylinder is pushed on from the left, an arrangement of the axis of rotation 7 with an angle of 270 ° as with the third movable stop 1c) is preferred. An end stop is preferably arranged in such a way that rotation of the pin 11 via a position in which the pin 11 is perpendicular to the surface of the cylinder 2 is not possible. If the hollow cylinder is pushed on from the right, an arrangement of the axis of rotation 7 with an angle of 90 ° as with the second movable stop 1b is preferred.

Reference symbol list:

1

Movable stop

1a

first movable stop

1b

second movable stop

1c

third movable stop

2nd

cylinder

3rd

Fastener

4th

Positioning part

5

Connecting element, e.g. Screws

6

Locking device

7

Axis of rotation

8th

Longitudinal axis of the cylinder

9

Tapped hole

10th

deepening

11

Pin code

12th

Lateral surface

Claims (17)

Cylinder (2), which is designed to receive one or more hollow cylinders on a lateral surface (12) of the cylinder (2), characterized in that it has at least one movable stop (1) with at least one movable element, the at least one movable element in a rest position does not protrude beyond the lateral surface (12) of the cylinder (2) and allows wooden cylinders to slide over it, and in an active position protrudes beyond the lateral surface (12) of the cylinder (2) and serves as a mechanical stop for hollow cylinders. Cylinder (2) according to claim 1, characterized in that the at least one movable element can be transferred from the rest position into the active position and vice versa via a rotary movement or a translational movement. Cylinder (2) according to claim 2, characterized in that the at least one movable element is rotatable about an axis of rotation (7) which is perpendicular to a longitudinal axis (8) of the cylinder (2). Cylinder (2) according to one of Claims 1 to 3, characterized in that the cylinder (2) has at least one immovable stop with at least one immovable element which projects beyond the lateral surface (12) and serves as a mechanical stop for hollow cylinders. Cylinder (2) according to claim 4, characterized in that the at least one immovable element is designed as a pin (11), as a raised edge, as a segment of a raised edge, as a raised ring or as a segment of a raised ring. Cylinder (2) according to one of claims 1 to 5, characterized in that the at least one movable element is designed as a pin (11), as a segment of an elevated ring, or as a segment of an elevated edge. Cylinder (2) according to one of claims 1 to 6, characterized in that a longitudinal axis of the at least one movable element in the active position deviates by less than 30 ° from an orientation perpendicular to the longitudinal axis (8) of the cylinder (2). Cylinder (2) according to one of claims 1 to 7, characterized in that the at least one movable element in the active position and / or the at least one immovable element in the range of 0.1 mm to 100 mm over the lateral surface (12) of the cylinder (2) protrudes. Cylinder (2) according to one of claims 1 to 8, characterized in that the at least one movable stop along a circumferential line around the circumferential surface (12) of the cylinder (2) distributed in the range of two to ten movable elements and / or that the comprises at least one immovable stop along the circumferential line around the circumferential surface (12) of the cylinder (2) in the range from two to ten immovable elements. Cylinder (2) according to one of claims 1 to 9, characterized in that distributed over the length of the cylinder (2) on the lateral surface (12) at least two movable stops (1) or at least one immovable stop and a movable stop (1) are arranged. Cylinder (2) according to one of claims 1 to 10, characterized in that the at least one movable element is made of a material which is selected from a metal, an alloy, a plastic, a fiber-reinforced plastic, a ceramic and a glass. Cylinder (2) according to one of claims 1 to 11, characterized in that the cylinder (2) further comprises at least one locking device (6) which is set up to fix the at least one movable element in the active position and / or in the rest position . Cylinder (2) according to one of claims 1 to 12, characterized in that the at least one movable element has means for pneumatic movement, an electric drive or means for manual movement. Cylinder (2) according to one of claims 1 to 13, characterized in that the cylinder (2) is an assembly cylinder for machining hollow cylinders, a pressure cylinder, or an adapter cylinder for mounting pressure sleeves on a pressure cylinder. Arrangement of cylinders containing a cylinder (2) according to one of Claims 1 to 14, characterized in that at least one further hollow cylinder is arranged on the cylinder (2) according to one of Claims 1 to 14, at least one edge of the further hollow cylinder being a movable one Element of the cylinder (2) touched in the active position. Method for positioning a hollow cylinder on a cylinder (2) according to one of claims 1 to 14, comprising the steps: a. Providing a cylinder (2) according to one of claims 1 to 14, b. Providing another hollow cylinder, c. Setting a selected movable stop (1) by moving at least one movable element of the movable stop (1) into the active position and optionally moving movable elements of non-selected movable stops (1) into the rest position, d. Applying the further hollow cylinder to the cylinder (2), the further wooden cylinder being pushed over a lateral surface (12) of the cylinder (2) until an edge of the further hollow cylinder touches at least one movable element of the selected movable stop (1). Method for dismantling an arrangement according to claim 15, which comprises a cylinder (2) according to one of claims 1 to 14 and a further hollow cylinder, comprising the steps: a. Providing an arrangement according to claim 15, b. Removing the further hollow cylinder by pushing the further hollow cylinder down from the lateral surface (12) of the cylinder (2), c. Setting a selected movable stop (1) by moving at least one movable element of the movable stop (1) into the rest position.

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