WO2001053160A2 - Cup, method for providing a cup, method for stretching a cup into a can and facilities - Google Patents

Abstract

A can, especially an aerosol can, is produced in two consecutive partial processes from a flat material having at least one metal layer, which is preferably coated with a plastic material, especially PET, on at least one side. Stackable cups (3), which are used as intermediate products, are produced with a first facility (1) in a partial process. The cups are stored in a stacked manner to save space and are then transported to a second facility (2). The surface area of the stackable cups has notches facing the axis and are shaped in such a way that the cross section of the cup diminishes from the first front face to the second front face, whereby the peripheral proportion of the notches increases from the first front face to the second front face. The second partial process is carried out in a second facility, whereby the cups (3) are separated from the stack and fed to a shaping device (15). The cups (3) are given the shape of cylindrical can bodies (6) in the shaping device (15). After stretching, the cylindrical can bodies (6) are preferably stretched to a desired length. In the case of aerosol cans, the open end of the can is deformed for receiving a valve.

Description

Cup, method for providing a cup and method for stretching a cup into a can, and equipment for carrying out these methods

The invention relates to cups according to the preamble of claim 1, to methods for producing cups according to the preamble of claim 5, to methods for stretching cups according to the preamble of claim 6 and to systems for carrying out these methods according to the preamble of claims 8 and 9.

During the processing and in particular during the production of vessels, these are carried out to processing stations for carrying out treatment steps, if necessary handed over to them, treated and then continued. In order to be able to process the vessels inexpensively, the conveying devices and the processing stations must be designed and matched to one another in such a way that a high vessel throughput can be achieved with simple means with as little interference as possible. It has now been shown that various systems for the production of vessels, due to a funding concept that has remained unchanged for a long time, have only been further developed by improvements to the individual processing stations.

The link to an apparently inviolable funding concept is particularly evident in the manufacture of extruded vessels, such as aerosol cans. The manufacturing process begins with a press process of a press. The raw containers or cans are cut and optionally brushed in a rough processing device. The cans are then placed on mandrels of a chain conveyor and passed through a cleaning station with a washing and drying device. After cleaning, the cans are coated with lacquer on the inside in an internal lacquer device. To do this, each can must be removed from the mandrel of the chain conveyor, placed in a holding shell and then inserted into a sleeve-like, rotatable holder. The interior paint is released from a nozzle that can be moved into the interior of the can while the can is being rotated. Afterwards, each can from the sleeve-like holder must be placed in an oven dish and passed through a first oven for drying before it is put back on a mandrel of a chain conveyor. Energy-intensive compressed air blasts are used to actuate the can movements along the axis of the can, which are necessary for interior painting.These compressed air blasts, the movements of the holding shells and the movements of the conveyor chain must be precisely synchronized with complex controls.The holding shells, the sleeve-shaped holders and the furnace shells are adapted to the current can diameter and have to be replaced for the production of cans with different diameters, which leads to long downtimes

In order to compensate for short-term differences in throughput of the processing station, chain stores are provided, which reduce or increase the number of mandrels in a conveying section.The outside processing station includes a primer, a printing and a top coat device. In these three processing devices, the cans are opened from the chain put a mandrel on, coat it, put it back on the chain and put it through a drying oven. Due to the necessary movements of the can, essentially the same problems occur as with the interior painting

After the external coating, there is another chain storage and then a final shaping device, for example in the case of aerosol cans for shaping the can neck, and a packaging device. Due to the chain concept, rigidly constructed linear production lines result, which can only be used in large halls and where all processing stations are accurate In addition, the maintenance effort for the supply chain, the energy loss of the oven and the water consumption for cleaning are very high. When the paints dry, large amounts of solvents come out, which have to be retained and disposed of

A solution is now known from W097 / 11015, in which chain conveyors can be dispensed with. By transporting the cans with pallets arranged thereon on movable conveying surfaces, the flexibility required to prevent synchronization problems arises in the conveying process, with a constant movement speed of the conveying surface, such as the conveyor belt of a belt conveyor, the movement speed of the cans and thus the distance between the cans can vary, because slippage is possible between the conveyor surface and the adjoining connection surface of the pallet by means of guide and stop elements that prevent the movement of the pallets the storage area can compensate for rate fluctuations and transfer areas are designed to provide cans at transfer points. The processing stations pick up cans to be processed according to their processing frequency from a storage area or from a transfer point and, after processing, move them to a demand area without synchronization

In order to prevent, without restricting the relative mobility on the front surface, that the connection surface unintentionally separates from the front surface or the box tilts with the pallet, the pallet is made of magnetizable material and the front surface is assigned permanent magnets or, if applicable, electromagnets, so that the Pallet adheres to the conveyor surface due to magnetic forces. This makes it possible for the conveyor surface to be oriented as desired without the pallets with the cans becoming loose. This arbitrary alignment is advantageous when transferring to processing stations and in particular also when processing in processing stations The pallet must be connected to the can body by means of a connecting device and separated from it again at the end of the manufacturing process and returned to a pallet store

According to WO97 / 11015, the demands between the processing stations and the transfer to them are simplified. In addition, it is also possible with little effort to divide the vessels to be processed into at least two sub-lines on which they can be guided to processing stations operating in parallel The system no longer has to be designed as a long linear production line. Nevertheless, the processing takes place in spatially spaced processing stations, which is associated with a large space requirement and a large number of vessels being produced

In order to simplify the manufacture of vessels, in particular aerosol cans, the individual processing steps can also be simplified in addition to the requirement, or optionally omitted or replaced. For example, a method is known from W095 / 34474 in which the cleaning, basic coating, printing and overpainting of the The outer surface of the vessel can essentially be dispensed with. The decor is printed on a foil and the foil is then applied to the outer surface of the vessel. Although it was known for containers with simple geometric shapes, such as cylinders, it was known to subsequently glue on a decorative layer Neck part not to be possible, because the layer material must undergo this deformation when the neck part is deformed. However, according to W095 / 34474, this is achieved by appropriate adaptation and selection of the foal material. The film material will generally have at least the same or better elasticity as the can. material It is also possible to use conventional shrink films, ie plastics that shrink under the influence of heat

Applying the decor in the form of a film has various advantages. First of all, it is not necessary to have all of the processes required for the manufacture of the containers run immediately one after the other. The printed film can be completely printed and covered with sealing wax on the back and must be covered thus can not be processed in the system for can production machines for printing foils can be used more economically and cheaper than for printing on the cans themselves. In general, savings can also be made in the cleaning process, because gluing with a finished, sheet-like layer in is generally less delicate than painting, especially with regard to possible grease residues. In addition, new possibilities for the decor, previously unknown in such cans, are created. Examples of this are the application of an embossed print and the use of printing processes and methods Types that previously could not be used for such cans. Further savings result from the elimination of drying processes. The omission of various parts of the system also reduces the investment costs

A solution is known from EP 0 525 729 A1, in which a decorative film is sealed to a beverage can. For this purpose, the beverage cans are also rotated on a rotary table. In a first rotation area, the film is wrapped somewhat overlapping around the can body to seal the film On the can body, a heatable sealing surface that runs parallel to the can axis is pressed against the overlap area of the film. By assigning a flat sealing surface that can be moved radially toward and away from the can to each can location on the rotary table, these sealing surfaces can be held on the can in a predetermined turning range It has now been shown that this sealing of the overlap area of the film is not sufficient for the subsequent deformation of the open can end into a neck part with a valve seat required for aerosol cans. The films are at least partially damaged by the deformation tools and / or detached from the can jacket during the deformation To narrow the open end of the can, pull-in rings with different inner diameters are used for aerosol cans.The pull-in rings are pushed onto the can in the direction of the can axis, starting with a pull-in ring with a large diameter, rings with ever smaller inner diameters are used which occur when the rings are pushed onto the can body Shear forces between the decorative film and the metallic can body are very large. Smaller narrowing of the open can end is known from the area of beverage cans because the diameter of the can lid is slightly smaller than the can diameter. To narrow the beverage cans at the open ends, spin flow Necking method and devices used For example, a solution with rotating constriction tools is known from US Pat. No. 5,150,595. Because the deformations for an aerosol can neck part are much greater than those for a seat of a beverage can lid, can also be used a known Neckingvornchtung not be guaranteed that the decorative film remains undamaged when forming the neck part of an aerosol can

Various methods for producing cans are known from the area of beverage cans. US Pat. No. 4,095,544 describes the production of a seamless steel can. The cylindrical can body is produced in three steps from a steel sheet coated with tin. In a first step, a disc is produced with a stamping step provided with the desired diameter In a second step, a cylindrical bowl is formed with a pressing process, which is also referred to as a cylindrical cup by German-speaking experts.In a directly subsequent third step, the cup is stretched into a cylindrical can body According to US Pat. No. 4,095,544 Press stamps are arranged in tubular form around the ironing stamp and the corresponding outer retaining rings are arranged one above the other so that pressing and stretching can be carried out on the same machine. The can body, as already described for the aluminum cans, must be ge wash, varnish and dry several times

EP 0 666 124 A1 discloses a method in which the can body is produced from a steel sheet coated with polyester. For this purpose, a disk must be punched out of the coated sheet and pressed into a cylindrical cup. There is a risk of subsequent stretching and possibly smoothing , that the Plastic layer is damaged. In order to prevent damage, a polyester layer with biaxially oriented molecular chains should be used, in which the ratio of diffraction intensities at different intervals lies in predetermined ranges. During deep drawing or stretching, the cylindrical shell of the intermediate product is held between two ring-shaped parts and with a plunger, which is a smaller one

Diameter has drawn the desired length as the intermediate, or the cup. It has now been shown that when stretching with optimally shaped annular holding parts and the correspondingly dimensioned plunger, the thickness of the jacket is reduced without the polyester layer being destroyed. This means that there is also a polyester layer in the cylindrical can body that seals the steel sheet tightly. To produce the can body, after a first ironing step - referred to as drawing in technical terms - further ironing steps - referred to as redrawing - must be carried out. The plungers used one after the other in the ironing steps have a decreasing diameter from step to step, with excessively large differences in diameter during stretching leading to forceful and undesirably large material deformations in the can wall and possibly damage to the coating. With the common multi-stage ironing processes, the force required for ironing is greatest in the first step and decreases from step to step. At the same time, the stroke performed by the ram as it is extended increases from step to step. With increasing lifting height, the performance decreases or the effort for the same performance increases. In order to carry out the multi-stage ironing process, presses are used which enable the maximum required force and the maximum stroke. Extremely complex presses are therefore used for all ironing steps.

At the moment, other coated sheets are also available on the market, which can be pressed and ironed in suitable processing steps without damaging the coating and, if necessary, can also be smoothed. These coated sheets are provided either by laminating a plastic film or, as described in WO98 / 52750, by directly extruding a plastic layer onto the sheet (see Protact, from Hoogovens Packaging BV, NL). The can body can be printed, varnished, dried and deformed to accommodate the lid closure at the free end of the can. The finished cans have to be stored temporarily and transported to the bottling plants. Because the finished or ready-to-fill cans are provided, only large series can be produced inexpensively. With the aerosol cans So many different diameters and can heights are required that the number of pieces required for an inexpensive series is often not achieved. This lack of flexibility is a disadvantage of the inexpensive manufacturing process

A solution is known from FR 2 213 816 and EP 0 031 254, in which a cup-shaped intermediate product with a conical wall is produced from a sheet at a first processing location and a final cylindrical can product is produced from the intermediate product at a second processing location Conical cups have circular cross-sections perpendicular to the cup axis and are stacked into sets consisting of cups inserted into each other after manufacture. In the second system, the cups are stacked from the sets. Transport from the first to the second processing location can be space-saving due to the stackability disks are punched out of the sheet metal. The sheet metal sections that are not used are obtained directly from the sheet metal manufacturer and can be recycled with little effort. FR 2 213 816 specifies for the production of the stackable intermediate product that it is produced in a deep-drawing process with a protruding edge and a slanted wall produced For the production of the cylindrical can body from the intermediate product it is stated that the process steps are the same as in the known processes, the known processes comprising the complex washing, drying and painting. EP 0 031 254 mentions for producing the conical intermediate product female molded part and a press part interacting with it In order to produce a cylindrical can part from the conical intermediate product, a female jerk molded part and a corresponding pressed part are mentioned.In FR 2 213 816 sheets are assumed which can be deep-drawn into conical cups in accordance with EP 0 031 254 aluminum sheet is preferred, which can be pressed between a female and a male press part in a conical and then again in a cylindrical shape. The references from the prior art mentioned for the formation of conical cups and for stretching ko African cups for cylindrical can bodies are not sufficient It is not clear whether the use of conical cups as an intermediate stage in the manufacture of cylindrical cans is only possible with certain materials and / or with the use of special tools. Experiments have shown that when manufacturing conical cups and undesirable wrinkles and / or weak points in the jacket wall occur during their further processing The division the manufacturing process in two sub-processes has so far not been able to establish itself

The object of the present invention is to find a solution with which can bodies, in particular aerosol can bodies, can be produced with little manufacturing effort, in particular also for small series

This object is achieved by the features of claim 1 or claims 5 and / or 6 and claims 8 and / or 9. The dependent claims describe preferred or alternative embodiments

In a first inventive step, it was recognized that an important disadvantage of the known can production with two partial methods is that the stackable cups are to be designed conically and with wall cross sections that are circular perpendicular to the cup axis. With the knowledge of this disadvantage, it was also recognized that other cup shapes can also be stacked when inserted. Stacked when inserted means that after stacking or inserting a cup on or into another, the two cups together have a total height that is less than twice the height of a cup when stacked cups are used the lateral surface at the bottom has a smaller inside and outside diameter than at the open end

At least a portion of the jacket surface is inclined to the axis of the cup, the inclination of the jacket surface or the respective tangential surface relative to the axis preferably being at least 7 ° and thus being above the self-locking angle in order to enable unstacking at any angle, even at small angles , spacer elements, in particular stacking cams, are used

In order to be able to stack conical cups with a particularly small void fraction, the conicity had to be particularly large, or the angle between the cup axis and the cup wall had to be as large as possible With the common multi-stage ironing processes, the force required for ironing is greatest in the first step and then decreases from step to step, the first ironing step should be carried out in the first installation so that the ironing device does not have to provide particularly high forces to the second installation must therefore provide stackable cups It has now but has shown that the production of conical cups with cross sections which are circular along the cup axis is problematic

Starting from disks, it is basically only possible to easily stretch cylindrical cups. If cylindrical cups are now to be shaped into conical cups with circular cross sections, there is a risk of wrinkles forming in an uncontrolled manner in areas where the circumference is reduced.This applies in particular in the case of thin sheets, that is to say with wall thicknesses below 0 5 mm. In areas in which the circumference is increased, there is a risk of cracking with simple molding presses because the wall material does not expand evenly over the entire circumference. The reduction in the length associated with the expansion Wall thickness will occur at individual points and will be so strong there that weak spots or cracks form Wrinkles and / or weak spots lead to problems during further processing, especially when deep-drawing or stretching in the second system.No can body can be produced in which the Can wall in the wese Since the wall thickness has decreased from the cup bottom to the open end, which leads to problems when stretching in the second system and the provision of can bodies along the can axis, even with a small conicity and without formation of wrinkles or weak spots constant wall thickness impossible

In the case of the coated sheets, the formation of wrinkles and weak points not only occurs in the sheet, but the same problem also affects the coating. This means that the coating is greatly impaired when the circumferential length changes. When forming a conical cup with a circular shape Cross sections can only be guaranteed if the conicity is very small, that the coating remains intact. If the conicity is small, the void fraction of the stacked cups and thus the transport volume is large

If conical cups with circular cross sections have to be produced directly from the disks, then circumferential expansions occur during pressing, which, as already mentioned above, are associated with the risk of cracking because the disk material, or the sheet metal and its coating, are not on the If the uniformity of the thickness decrease should be ensured by the interaction of a male and a female press part, many small pressing steps had to be carried out with press parts matched to each other. This would be extremely complex and, in addition, material resharpening was produced by ceramic reshaping, which would result in an appropriate stretching to a can body complicate It has also been proposed to form conical containers with flexible press parts, these press parts having to be pressurized on the inside with a pressure fluid, which is only possible with a low clock frequency and thus a low output

The stretching of cylindrical cups into cylindrical can bodies is known from the prior art. When stretching without deformation, the cylindrical wall material reaches a first annular deflection edge, in which the wall material of the cup is deflected radially inwards. In the case of a second annular deflection edge with a smaller circumference, this becomes Cup material deflected from the radial inflow direction back into the axial direction. The deflection edges enable material deformations that are necessary for the desired flow or ironing behavior. When a conical cup is stretched directly, the circumference of the casing must be narrowed against the first deflection edge when a casing section is moved without this Wall material is reshaped by a deflecting edge. The narrowing of the circumference must be compensated for by a thickening of the wall and / or by an increased amount of waste compared to the flowing in. In both cases, in the wall of the cup when stretching or moving against en the first deflection edge, material displacements take place, which are difficult to achieve or control without a discrete deflection edge and thus without a discrete deformation trigger, if there is an uncontrolled pulling of the conical wall against the first deflection edge there is a risk of wrinkles being formed

Therefore, in accordance with a preferred solution, it is provided that the stackable cups are brought into an essentially cylindrical shape before being stretched out of the stackable one. If conical cups with circular cross sections are now converted into a cylindrical shape with a pressing step, the necessary circumferential changes result in the same problems that have already been described above when forming a cylindrical into a conical cup with a circular cross section In the course of a second inventive step, it was recognized that the stackable cup used had to be formed from a cylindrical cup, wherein essentially no changes in the thickness of the cup material and the coating should occur during the shaping. This means that the total area should remain unchanged and in the area of the cup wall no changes in the circumferential lengths should occur.This is possible if the stackable cup does not have circular cross-sections along the entire cup axis. The cup cross-section must be reduced towards the cup bottom by indenting the cup wall against the Cup indentations are achieved. These indentations are referred to as folds or depressions, and their depth, or their circumferential portion and / or, where appropriate, their number along the circumference increases from the open cup end to the cup bottom. Also in the area of the cup bottom To be able to provide a constriction, the transition from the cup wall to the cup bottom is accomplished ts when the cup is stretched out with a sufficiently curved connection area from the cup wall to the cup bottom and / or the floor is arched to narrow the connection area. The floor curvature is preferably directed toward the inside of the cup because a floor curve without If a spring tension is generated in folds, folds or indentations are formed in the floor in addition to or without a floor arch. Before the indentations in the floor are preferably radial, their depth in the center of the floor disappears and increases towards the outside due to the formation of folds and the floor arch the cup is a shape that is similar to a Gugelhopf shape or a cup cake shape. Such a shape is stackable and at the same time enables the material thickness to be kept constant

Because the material thickness remains essentially unchanged when a cylindrical cup is formed into a stackable cup with folds, the effort required for the formation is small. The shape changes required to form the stackable cups without circular cross sections without material displacements within the layer material are simple Devices, in particular with forming presses with matching male and female pressed parts, or also with rollers that can be pressed against the inside and outside of the cup wall with interlocking teeth, can be achieved. No material hardening that complicates the subsequent stretching is produced by artificial deformations If the stackable cup with folds is brought into an essentially cylindrical shape before it is stretched out of the stackable cup, then only the folds have to be streaked out because no changes in the circumferential lengths and accordingly no material deformations are necessary, this can be done with small deformation forces and thus with simple system parts are carried out, the coating is not affected and the resulting cylindrical cup also has an intact coating.As with the formation of the folds, no change in thickness of the cup material is necessary when removing the folds. An originally cylindrical cup thus also shows after the forming a stackable cup with folds and the

Jerking in a cylindrical cup everywhere the original, essentially constant wall thickness. The requirement for the tolerance of the thickness of the flat material is not increased by the reshaping and jerking. According to the state of the art, the jerked cylindrical cup can be stretched to a can body and to a desired one Long be cut

The processes for deforming a cylindrical cup into a stackable cup with folds and for reshaping a stackable cup with folds into a cylindrical cup can be used advantageously for all can materials. This means that these partial processes are also advantageous if the finished cans are still washed, dried and painted, that is to say also when using uncoated metal sheets, but the methods according to the invention are particularly advantageous when using flat material with a metallic layer which is at least on one side, but preferably on both sides, with plastic, in particular PET, Coated Because the coated steel sheet can be stretched without adding oil, no complex cleaning and drying steps have to be carried out in the second system. Accordingly, the second systems can be designed simply and inexpensively, so that the transport is reduced baptism comes into its own and is not reduced by complex second systems

Because the first ironing step has to be carried out with high forces and thus with complex devices and the subsequent ironing steps can be carried out with simpler devices, it is possible to use the costly system parts in the first system and in the second systems only simple system parts Since the second systems can now be set up very easily, it is possible to provide the systems for producing the finished can bodies directly from the can buyers or filling systems starting from the stackable cups used. The transport effort for the finished cans can thus be reduced to a minimum without That the plant expenditure is particularly high If more can manufacturers are provided, they can use cost-effective plants with low throughputs. Accordingly, even small series can be produced very efficiently. When planning the plants, it has been shown that cup production preferably has a performance in a range of 1200 to 2000 cups / minute and the can production with an output of essentially 200 to 300 cans / minute should be designed accordingly. A cup manufacturer should produce cups for 4 to 10 can manufacturers

The ironing press is, at least for high throughputs and with high ironing forces, a complex part of the system. If the forces required for ironing are not particularly high in the second system, the ironing press can be designed with a hydraulic cylinder or with a linear drive on a rotary table If an ironing device is assigned to the can location of the turntable, the ironing can be carried out on the turntable while the cup is rotating. The large strokes do not have to be carried out with an unnecessarily high cycle frequency if the second system is set up with a can filler and / or the stretched can body For example, to get into an intermediate can store, a simple ironing press with a lower throughput can be used, because filling generally takes place at a lower frequency and sometimes with interruptions Che can bodies with different diameters and heights are stored

In the second system, a decorative film can be arranged on the cylindrical outer compartment of the can body, which is preferably sealed with at least one essentially annular or with at least two, in particular more than two, partially annular sealing press surfaces in an annular sealing area on the can body, by the annular sealing area adjoining the open end of the cylindrical can body, it can be ensured that the decorative film in this area of victory is so well connected to the can jacket that the film also closes a subsequent deformation step to a standard opening, in particular for a valve receptacle, adheres to the can jacket undamaged. In the case of flat can material coated with plastic, the seal can also be understood as a connection of at least one layer of foal to the coating of the flat material. It goes without saying that also in the area of the can base annular victory area can be formed

In order to produce a series of cans with a special inscription, the second system must include at least one further processing station for attaching the desired decorative film.This further processing station is preferably equipped with a rotary table. In a first rotating area, the film is wrapped around the can body and, if necessary, a light one under the influence of heat Adhesion of the film to the can body is achieved In order to seal the film to the can body, an annular, heatable sealing surface is pressed against the can jacket with the film in the area of the open end face of the cylindrical can body. A sealing head with at least one essentially ring-shaped or with at least one ring head is pressed into each can area of the rotary table is assigned to two part-ring-shaped sealing press surfaces, these sealing surfaces can be held on the can in a predetermined turning range or during a given turning time for the movement through the turning range I have now shown that sealing of the film that can be achieved is sufficient to carry out the subsequent deformation of the open can end required for aerosol cans to form a neck part with a valve seat without damaging the film

If there are special demands on the separating effect of the plastic layer on the inside of the can body, it may be appropriate to arrange a separating film inside the can.To do this, it is wrapped around a mandrel, closed in a bag or welded and inserted into the can body in order to hold it firmly in at least one To achieve the ring area on the open end of the can jacket, a heatable sealing surface is pressed from the inside against the can jacket with the separating film.This inner sealing surface is designed analogously to an outer sealing surface. If a decorative and a separating film are arranged on the can body, a common one Sealing head, preferably cooperating inner and outer pressing surfaces and at least one heating device. Inner sealing surfaces are also preferably used for the assigned to a rotary table and rotated with the can bodies during the sealing process

In order to carry out the deformation of the open can end, at least one further processing station is provided, which preferably comprises a turntable, to which rotating necking, in particular spin-flow necking, devices are assigned. The processing can be carried out during the rotating movement of the turntable If the processing tool and the can body are rotated relative to one another about the can axis in the spin flow neck devices, then either the can body or the processing tool must be able to be rotated relative to the rotary table about the can axis. In order to border the free end face of the narrowed neck part To make possible, a peripheral roll device is preferably provided. This is assigned, for example, to the can locations of a second turntable of the processing station for deforming the open can end. With the solution described for deforming the open can end, a monobloc aerosol can can be made from a coating hteten Flachmateπal be produced with an applied decorative film It goes without saying that instead of the deformation to a valve seat of an aerosol can, a can end can also be formed for flanging a dome with a valve seat or a beverage can lid

The application of the decorative film and the subsequent shaping of the open can end can be adapted to different can heights without great conversion effort. In the case of changes in diameter, other sealing press surfaces or sealing heads must be used. The roll with the printed decorative film can also be easily replaced.Therefore, small series with an extremely small one can be used Additional effort, or with essentially the same costs per can, as in large series, can be produced. The inventive solution enables extremely flexible provision of cans. Because of the great flexibility and the simple processing parts of the second system, it is possible and advantageous to provide the To provide cans as part of the bottling system at the bottler In the simplest case, the bottler will then only need a space-saving warehouse with different sets of stacked cups. A set with the rich term cup sizes for further processing If necessary, it is also appropriate to provide a bearing with already stretched cylindrical can bodies without decor. It goes without saying that that the second system can also be provided by a can manufacturer who supplies various fillers with cans, the cans each being provided with the corresponding decorative film

With the elimination of complex processing stations for cleaning, applying the base coat, drying, printing and overpainting, a system for aerosol cans can also be designed according to a completely new concept. It is about a new system concept for the production of containers made of sheet metal coated with plastic are and preferably include an outside, but possibly also inside, attached film on the can body.By eliminating the time-consuming processing steps of cleaning and drying, a system can be designed in which the entire production time for a vessel is very short the number of cans being processed is kept small, which in turn enables the entire conveying path in the system to be very short. In order to optimally utilize the conveying path in the system for processing, stop and go is preferably used as far as possible There is no need for stationary processing stations.Stop and go steps, or when transferring the cans being processed from a conveying area to a stationary processing area, impose speed limits, otherwise accelerations that are too high must be achieved with excessive forces for moving can bodies provided with movable processing stations

The drawings explain the solution according to the invention using exemplary embodiments

1 shows a schematic representation of the two-stage production process, or of the two plants, for the production of cans, FIGS. 2a, 2b, 2c examples of cups used,

3a, 3b deformation steps in the manufacture of an aerosol can,

4 shows a schematic top view of processing stations connected in series for applying a decorative film and for deforming the open can end, 5 shows a schematic sectional illustration of a sealing head,

6a, 6b, 6c and 6d side views of intermediate products in a multi-stage ironing process for providing can bodies, FIG. 7 side view of a conical cup, FIG. 8 side view of a conical cup with small conicity and stacking cams,

9 side view of a stackable cup with folds or indentations, FIG. 10 schematic representation of sections of two nested ones

Cups, Fig 1 1 perspective view of a cut cylindrical cup, Fig 12 perspective view of a cut cup with a

Cup cake form, Fig 13-15 schematic representation of a section through a device for

Jerking a cup according to Fig 12 into a cylindrical cup and to

Stretching into a cylindrical cup with a smaller cross section and FIG. 16 section through a device for stretching a cup with folds into a cylindrical cup with a smaller cross section

1 shows a two-stage manufacturing process, in which rod-shaped or core-shaped sets 4 are produced from inserted stacked cups 3 in a first system 1. In a second system 2, cylindrical can bodies 5 and 5 are produced starting from the rod-shaped sets 4 or the stackable cups 3 used Subsequently, ready-to-fill cans 6 are produced. In the first system 1, a flat material 7 with a metallic layer, in particular in the form of a steel sheet, is unwound and processed from a roll 8. The metallic layer is preferably at least on one side, but in particular on both sides with at least one Plastic layer coated Three polymer layers are preferably applied, with a layer adjacent to the sheet as the contact layer providing optimum adhesion, a main layer as a mechanically resilient layer and a surface layer as a layer with the desired surface properties if decorative foils are applied to the cans it is expedient to design the surface layer assigned to the film as a connecting or adhesive layer for the film

The flat material 7 is fed to a punching and manufacturing device 9. The punching and manufacturing device 9 punches disks from the flat material and forms them with at least one tool in at least one receptacle to form stackable cups 3 The cups 3 pass through a continuation 10 into a stacking device 11 for stacking the pressed cups 3 in the form of rod-shaped or core-shaped sets 4. The sets 4 are preferably stacked on pallet-like receptacles 12. In the form of the sets 4, the cups 3 can save space stored and in particular transported according to arrow 13 to the second system 2. It goes without saying that the second system 2 may also be arranged directly at the first system 1. Because of the intermediate storage of the sets 4, the two systems can be operated independently of one another the throughput of the first system 1 can be selected independently of the throughput of the second system 2 If the cups are now punched out and pressed by the sheet metal manufacturer, it is expedient to operate the punching and manufacturing device 9 with several tools acting in parallel and high clock frequencies when using punching - And manufacturing device 9 with 100-200 strokes n per minute and with flat material widths of approx. 1000 to 1200 mm, up to approx. 2000 cups per minute can be produced. As a result, the production costs for a cup can be kept very low. The cups of a first system 1 with high throughput (eg 2000 cups / minute ) are led to different second plants 2 These second plants 2 have throughputs (eg 300 cans / minute) which are significantly lower than the throughput of the first plant 1

The second system 2 comprises a stacking device 14 for stacking cups 3 from a stack or from a set 4. The separated cups 3 are fed to a shaping device 15, in which stackable cups 3 are used to form cylindrical can bodies 5. The can bodies 5 are then preferably through An Ablangvorπchtung 16 for cutting the cylindrical can body 5 out Before the further processing of the can body 5, an intermediate storage in a storage device 17 is optionally provided. This storage is particularly advantageous in systems that are to produce many different sized cans, especially when small series are also desired If the bearing device 17 is dispensed with, the can bodies 5 go directly to the next processing station.

Because the stretchability of stackable cups with a circular cross-section is not ensured with reasonable effort, indentations 34 are provided in the jacket wall in cups 3 according to the invention. forms that the cup cross-section decreases from the open end side towards the closed end side, the peripheral portion of the indentations 34 increasing from the open end side towards the closed end side hm

The further processing of the can body 5 to fillable cans 6 is also shown in FIG. 4, in the form of a schematic plan view. In this case, feeders 22 and further transfer turntables 21 are also shown

In the case of cans which are provided with a decorative film, a decorative foal application device 18 follows, with which a decorative film is arranged on the cylindrical outer surface of the can body 5. The decorative film is preferably unrolled from a decorative foil roll 19, separated and placed on the jacket of the Can body 5 applied In order to enable quick processing without stop-and-go, the decorative film applicator 18 is preferably designed as a processing station with a turntable 23 and an axis of rotation 18a. When the decorative film is applied to the can body, the can body is turned about its axis rotated, for which purpose the turntable 23 comprises rotatable can holders 24 at the can positions, which can be set in rotation in the desired manner by means of a control and a drive. In order to fix the film with the entire inner surface at least somewhat on the can body, a heated contact surface or another may be required Heat supply provided around the decor If at least in the area of the open end face of the can body 5 to be firmly connected to the can body 5, at least one sealing head with at least one essentially annular or with at least two partially annular sealing press surfaces is preferably provided. The at least one sealing head is preferably arranged in this way on the application device 18 that he assigned a can body 5 rotates with the turntable and carries out the sealing during part of the rotary movement or for a predetermined time, the sealing head being movable towards and away from the can body in the direction of the can axis. The sealing head makes the pressing surface Can be pressed onto the can body with a given force and the desired heat can be supplied to the sealing surface at a given temperature

5 comprises an embodiment of a sealing head 26 with an annular sealing surface at least three, but preferably six, part-shaped pressing elements 27. The pressing elements 27 have a pressing surface 27a towards the can body 6 in the form of a partial surface of a cylinder jacket and a conical actuating surface 27b towards the outside guided in radial grooves 29a of a lifting element 29 for radial movements In order to press the pressing elements 27 against the actuating ring 28, spring elements 30 are arranged in the radial grooves 29a Can body 6 moves Then the actuation ring 28 is moved against the can body 6, whereby the pressing elements 27 are pressed against the can body with their pressing surfaces 27a. In order to provide the heat necessary for sealing, a heating device 31 is provided in the actuation ring 28 orderly

It goes without saying that, instead of the radially movable partial cylinder surfaces, sealing surfaces in the form of conical jacket axial sections, in particular conical annular surfaces, and partial surfaces thereof can be used. In order to achieve a pressure, such pressing surfaces that are somewhat inclined to the axis of the can body are used. pressed in the direction of the can axis on the open can end, which narrows the can diameter a little at the open end. If necessary, co-operating inner and outer pressing surfaces are also used, so that the can jacket can be clamped in the area of the open end between these pressing surfaces The can jacket in the area of the open end when the sealing head is separated from the can body is widened somewhat. For this purpose, a push-off device is preferably provided on the sealing head for pushing off the can body

After the decorative film has been applied, the can body 5 enters a deformation device 20 for deforming the can body shell in the region of the open end face of the cylindrical can body 5 to form a can neck 6b. FIG. 3a The deformation device 20 preferably does at least one spin flow necking Correcting a deformation into a standard opening, in particular for a valve receptacle, can be carried out Deformation device 20 designed as a processing station with a turntable and an axis of rotation 20a. The at least one spin flow necking device is preferably arranged on the deformation device 20 in such a way that it is assigned to a can body 5 and rotates with the turntable and carries out the deformation during part of the rotary movement , the at least one spm flow

Necking device towards and away from the can body Because with the spin-flow-necking device, the processing tool and the can body are rotated relative to one another about the can axis, either the can body or the processing tool must be rotated relative to the rotary table about the can axis in To this end, the can locations of the turntable 23 are preferably designed, as in the case of the decorative film applicator 18, as rotatable, or possibly fixed, can holders 24. The transfer between the two processing stations 18 and 20 with turntables 23 takes place via a transfer turntable 21 it goes without saying that the deformation device 20 also has at least one further deformation device 20 ′, for example a

Bordelvomchtung 25 for bordering the free end face of the narrowed neck part in the form of a Randumroll Vorπchtung according to Fig 3b, may include the can locations of a second turntable 23 of the processing station for deforming the open can end

2a, 2b and 2c show examples of differently shaped stackable cups 3 used. The diameters and heights of these cups are determined in accordance with the can diameter to be achieved by stretching and the can height to be achieved. In addition, the desired wall thickness of the can must also be achievable when choosing one In addition to good stretchability, the shape of the cup must also be guaranteed to be easy to stack and unstack. Because the stretchability of stackable cups with a circular cross section is not guaranteed with reasonable effort, indentations (not shown) are provided in cups according to the invention. These indentations are designed in such a way that that the cross-section of the cup decreases from the open end face to the closed end face, the circumferential portion of the indentations increasing from the open end face towards the closed end face. FIG. 2a shows a simple form in which the lateral surface between the inlets Bores is formed as a circular cone section with a straight generatrix, the generatrix being an angle of approximately 8 ° to the cup Axis emschhesst Fig. 2c shows a cup according to Fig. 2a, but at the open end of the cup there is an essentially radially outward ring area. This ring area can be used as a holding area during stacking and stacking - Gen is shaped as a circular cone section with a curved generator

The dimensions, in particular the height, diameter and wall thickness, of the cups used depend on the size of the cans to be ironed from them. In the area of aerosol cans, can diameters of 35, 45, 50 and 53mm are common.The common heights of the cans with a diameter of 35mm are 88 and 135mm With a diameter of 45, can heights of 105, 150 and 190 are common With diameters of 50 and 53, heights of 106 and 190 or 110 and 205 are common When using a flat material coated on both sides with a thickness of 0 35mm, one can be used for aerosol cans thickness of the floor of essentially 0 3 mm required for safety reasons

Flat material punched out must be dimensioned such that it comprises enough flat material to provide the material of the can body to be produced therefrom, the can wall of an aerosol can should have a thickness of essentially 0.17 mm. The disks or the punching tools are used for punching out disks selected according to the can diameter and the can height. For cans with a diameter of 35, 45, 50 or 53 mm according to the desired can height, discs with disc diameters Sd = 85 mm with a can height Dh = 88 mm, Sd = 102 mm with Dh = 135 mm, and Sd = 106mm at Dh = 105mm, Sd = 123mm at Dh = 150mm, Sd = 136mm at Dh = 190, and Sd = 1 13mm at Dh = 106mm, Sd = 145mm at Dh = 190mm, or Sd = 1 19mm at Dh = 1 10mm, Sd = 154mm used with Dh = 205mm Cups according to Fig. 2a are pressed from these disks, which on the bottom correspond to the can diameters 35, 45, 50 and 53mm cup diameters of 49, 63, 70 and 74mm and according to the disk diameter v on 85, 102, 106 123 136 113, 145, 119 and 154mm cup heights of 24 3, 40 5, 28 5, 44 0, 57 9, 28 9 and 61 7mm when stretching the cups the desired body can be achieved

3a and 3b show the deformations required for aerosol cans in the area of the open can jacket, which can be achieved by means of spinning flow necking (Fig. 3a) and rolled edge forming (Fig 3b) The bottom 6a bulged against the inside of the can is preferably formed when stretching out to form the cylindrical can body. For this purpose, the deep-drawing plunger and the press mold associated with its end face must be adapted to the desired bottom shape

6a, 6b, 6c and 6d show the four-stage ironing process according to a solution from the prior art. A cylindrical cup 3a is pressed from a disc in a first processing step - referred to in technical terms as drawing - for the manufacture of the can body, then more - than referred to as redrawing - ironing steps are carried out In accordance with the example shown, the cups 3b and 3c form intermediate stages in the manufacture of the can body 6. The plungers used one after the other in the ironing steps have decreasing diameters from step to step. The cup diameters d1, d2, d3 also take accordingly the can diameter d4 decreases. The wall thickness essentially only decreases with the second and third redrawing. Excessive differences in diameter lead to forceful and undesirably strong material deformations in the can wall and possibly damage to the coating of the common ones multi-stage ironing process, the force required for ironing is greatest in the first step and decreases from step to step.At the same time, the stroke performed by the ram during ironing increases from step to step.The bottom shape of the can body 6 can already be formed in a cup to be ironed further Multi-stage ironing processes are carried out according to the state of the art, presses which enable the maximum required force and the maximum stroke. Thus, extremely complex presses are used for all ironing steps

6a, 6b, 6c and 6d, the cup 3b is formed into a stackable cup, if necessary, instead of the cylindrical cup 3b, a stackable cup is formed directly from the State of the art are conical cups 3k according to FIG. 7 with circular cross-sections, the inclination of the lateral surface or the respective tangential surface relative to the axis being 7 ° to 8 ° and thus being above the self-locking angle cylindrical cups can be carried out without problems If cylindrical cups are now in conical cups with circular cross sections In areas where the circumference is reduced, there is a risk of wrinkles forming in an uncontrolled manner in areas where the circumference is increased, there is a risk of cracking because the wall material is not uniform over the entire circumferential length The reduction in wall thickness associated with the expansion will occur at individual points and be so strong there that weak points or cracks form Wrinkles and / or weak points lead to problems during further processing in the second system. Can bodies cannot be produced, where the can wall has a constant wall thickness essentially everywhere. Even with a small conicity and without formation of wrinkles or weak spots, the wall thickness would decrease from the cup bottom to the open end, which leads to problems when stretching in the second system and the provision of Can cores with a constant Wa along the can axis nd strong impossible

In order to minimize the problems with circumferential changes, a conical cup 3k 'according to FIG. 8 with a small conicity and stacking cams 32 could be provided. Due to the small conicity, the circumferential changes are kept small and the unstacking is ensured by the stacking cams acting as spacer elements but connected with the disadvantage of a high empty volume when stacked

10 shows how the conicity or the angle α between the axis and the casing of a conical cup 3k affects the stacking height C per cup or the air height E between adjoining cups. Here, w represents the wall thickness of the cups 3k, sp Gap width between two cups 3 and A represents the sum of w and sp The stack height is calculated as follows

The maximum stack height corresponds to the cup height and occurs when the cups cannot be inserted into each other. For w = 0 3mm, sp = 0 05mm and thus A = 0 35mm, a stack height C α = 2 ° results according to the selected angle α C = 10 03mm E = 9 73mm α = 8 ° C = 2 52mm E = 2 22mm α = 10 ° C = 2 02mm E = 1 72mm If very small angles are chosen to reduce forming problems, such as α = 2 °, this results in an undesirably large stack height.In addition, even with small changes in circumference, the expansion or compression is local and not evenly distributed over the circumference. Even the smallest local deviations from of the mean wall thickness can lead to intolerable disturbances in the can wall when the cup is stretched to the can body. In order to be able to stack conical cups with a particularly small amount of voids, the conicity had to be particularly large or the angle between the cup axis and the cup The wall had to be as large as possible, but - as can be seen from the above compilation - the decrease in the stack height decreases with increasing angle

In order to enable simple stacking and stacking, instead of stacking cams 32 distributed over the circumference, a stacking edge 33 is preferably provided, which provides a spacing step with the stacking height C as an external dimension in the axial direction

9 shows a cup 3 according to the invention with indentations 34 or with folds against the axis, which are designed such that the cup cross section decreases from the first end side towards the second end side, the peripheral portion of the indentations from the first end side against the increases second end face The indentations 34 allow a stackable shape, which can be achieved starting from a cylindrical cup essentially without circumferential changes or expansions or compressions in the jacket wall so that the transition area from the jacket wall to the floor can be easily converted into the stackable shape according to the invention , it is expedient to design this transition area with a sufficiently large radius of curvature already when the cylindrical cup is formed

The indentations 34 are preferably formed by pushing a cylindrical cup into a female shape with inwardly projecting ribs. The ribs push the inward wall there where the indentations 34 are to be formed. The ribs first act on the outer wall at the bottom of the Cups Starting from these first contact points, the indentations are shaped ever further towards the open end of the cup and more and more strongly towards the cup axis. It goes without saying that the indentations also have radially movable press ribs or Pairs of rollers can be formed with teeth that interlock on both sides of the cup wall. When the indentations are formed, no material displacements or reshaping in the entire ring areas of the cup wall are necessary. In essence, only the shape of the cup is changed with the indentations 34, the total area and, accordingly, the thickness of the flat material of the cup remains unchanged. The indentations 34 are formed with radii of curvature that are as large as possible, so that no irreversible material deformations occur even in these regions of curvature essentially completely undone. Because the total area of the flat material remained unchanged when the indentations were formed, the original cylindrical shape of the Cups The forces which occur when the indentations 34 are formed and removed between the tool and the cup are small and therefore do not lead to damage to the sheet, even in the case of sheet metal coated with plastic

The shaping of the cylindrical cup 3b into a cup 3 with indentations 34 and a curved base is illustrated with the aid of FIGS. 1 and 12. The base curvature 35 is preferably directed towards the inside of the cup. The indentations 34 and the base curvature 35 maintain the shape Cup 3 a shape that is similar to a cupcake shape The dashed arrows 34 'are intended to illustrate that the areas with the indentations 34 are printed inwards. For the deformation, at least one female and in particular a corresponding male press part is preferably used two steps with at least two female pressed parts The last used press part has essentially the desired cup shape. A press part, if used previously, is used to gently initiate the desired deformations. The cup and the pressed parts are preferably moved against each other in the axial direction dashed lines 36 show that the circumferential length can be kept essentially constant by the indentations 34 even with a decreasing cross-section of the cup. It should be noted that this keeping constant only applies to the outer wall of the original cylindrical cup 3 The curvature area between the jacket wall and the base, already provided for the conical cup, is intended to narrow the cross section at the base The indentations 34 extend into the woven base area, are distributed substantially uniformly over the circumference and ensure, in particular in the entire cup material, the largest possible radii of curvature. In addition, it can be ensured that the steepest wall area has an angle to the axis of the cup 3 of over 8 ° has

13 shows a shaping device 37 for producing a cylindrical cup 3c from an inserted stackable cup 3 with indentations 34. The shaping device 37 comprises at least one jerking device with a jerking element 38 for jerking the cup 3 into a cylindrical cup. The jerking device shown comprises approximately a tubular tappet and a receptacle 39 for receiving the cup 3, as well as an annular holding element 40 for holding an end ring 41 of the cup 3. The movement of the jerking element 38 together with an ironing plunger 42 into the interior of the cup 3, according to FIG. 14, in a first cylindrical Hollow region 39a of the receptacle 39 is formed into a cylindrical cup 3b. During the subsequent stretching process, the ironing device is formed by the receptacle 39, the jerking element 38 and the ironing plunger 42. According to FIG. 15, the end ring 41 is released by lifting the holding element 40 The element 38 now serves as a hold-down element and interacts with a corresponding ring surface 43 of the receptacle 39. The transition edge 44 from the ring surface 43 to the second cylindrical hollow region 39b of the receptacle 39 acts as an ironing edge during the ironing movement of the cup performed by the ironing plunger 42 the indicated ironing process, a cylindrical cup with a smaller cross-section and a larger height is produced. According to the prior art, this cylindrical cup can be ironed into a can body

16 shows a solution in which the cup 3 is directly stretched out with indentations. A hold-down element 45 adapted to the indentations 34 must ensure that the indentations 34 move around forming regions 45a with material forming without wrinkling into the radial holding-down region between the Hold-down element 45 and receptacle 39 also have to be folded regions 45b of hold-down element 45 must guide the conically moving jacket wall of cup 3 in such a way that indentations 34 in the drawn jacket area strengthened training and thus an uncontrolled formation of wrinkles is avoided. Because the reshaping areas 45a are not circular, but have projections that are adapted to the indentations, rotationally symmetrical reshaping in the transition to the radially extending hold-down area is less easy to ensure than when using annular reshaping areas. Therefore, the previous spreading of the cup 3 and the shaping on annular first shaping regions 38a shown in FIG. 14 are associated with fewer problems.

Claims

Patent claims

Cup (3) with a jacket surface running around an axis, which is open on a first end face, and a bottom that closes off the jacket surface on a second end face, the cup (3) being an intermediate product for producing a can body from a flat material with a metallic layer manufactured by punching and pressing, used stackable and can be stretched into a cylindrical can body (6), characterized in that the lateral surface has indentations (34) towards the axis, which are designed such that the cup cross-section from the first end face against the second end face decreases, the circumferential portion of the indentations (34) increasing from the first end face towards the second end face

Cup (3) according to claim 1, characterized in that the metallic layer of the flat material at least on one side, but preferably on both sides, with

Plastic is coated

Cup (3) according to claim 1 or 2, characterized in that the base is curved and / or has radial folds, the base curvature (35) preferably directed towards the inside of the cup (3) and the cup (3) through the indentations (34) and the base bulge (35) receives a shape that is similar to a cupcake shape

Cup (3) according to one of claims 1 to 3, characterized in that the jacket surface from the first end face to a curved transition area from the jacket surface to the floor in normal planes to the cup axis has essentially constant circumferential lengths and in particular a substantially constant length Has material thickness

Method for providing a cup (3) which can be stacked and stretched into a cylindrical can body (6), which has a jacket surface which extends around an axis and is open on a first end face and a bottom which closes the jacket surface on a second end face Stamping step for separating a disk-shaped flat material from flat material with at least one metallic layer, with a manufacturing step for producing a stackable cup (3) from the disk-shaped flat material and with a stacking step for stacking the stackable cups (3), characterized in that the manufacturing step comprises at least one pressing step for providing a cylindrical cup (3b) and at least one reshaping step for reshaping the cylindrical cup (3b) into a stackable cup (3), in the reshaping step indentations (34) of the cup wall against the cup axis hm being formed such that the cup cross section is from the first The end face decreases towards the second end face hm and the circumferential portion of the indentations (34) increases from the first end face towards the second end face

Method for producing a cylindrical can body (6) from an inserted stackable cup (3) according to one of Claims 1 to 4, which cup (3) has a jacket surface that runs around an axis and is open on a first end face, and the jacket surface on one second front end of the floor and indentations

(34) of the cup wall against the cup axis hm, the cup (3) being stacked from a stack (4) and shaped with a shaping step into a cylindrical can body (6), characterized in that the shaping step comprises at least one Jerking step for shaping the cup (3) into a cylindrical cup (3b) and at least one ironing step for stretching the cylindrical cup (3b) into the cylindrical can body (6)

A method according to claim 6, characterized in that a decorative film is arranged on the cylindrical outer surface of the can body (6), which preferably has at least one essentially annular or with at least two partially ring-shaped sealing press surfaces (27a) in an annular sealing area on the can body (6) is firmly sealed, the annular sealing area adjoining the open end face of the cylindrical can body (6) and being deformed in a subsequent deformation step to form a standard opening, in particular for a valve receptacle

Plant for carrying out a method according to claim 5 with a punching device (9) for separating a disc-shaped flat material piece made of flat material with at least one metallic layer, with a manufacturing device for manufacturing of a stackable cup (3) from the disk-shaped flat material piece and with a stacking device for stacking the stackable cups (3), characterized in that the manufacturing device has at least one pressing device for providing a cylindrical cup and at least one forming device for forming the cylindrical cup into one Stackable cup comprises, the forming device making indentations (34) of the cup wall against the cup axis so that the cup cross-section decreases from the first end face towards the second end face and thereby the peripheral portion of the indentations (34) from the first end face increases towards the second end face.

9. System for carrying out a method according to claim 6 for producing a cylindrical can body (6) from an inserted stackable cup (3), which has a circumferential surface extending around an axis and which is open on a first end face, the outer surface on a second end face final bottom and indentations (34) of the cup wall against the cup axis, the system comprising a stacking device (14) for stacking the cups (3) from a stack and a molding device for molding the cups (3) into cylindrical can bodies (6), characterized in that the shaping device has at least one reshaping device for reshaping the cup (3) into a cylindrical cup (3b), preferably with a holding device (39, 40) for holding the cup (3) and one into the cup (3) insertable plunger (38) for spreading the indentations (34), and at least one ironing device (38, 39, 42) for ironing the cylindrical cup (3b) in the cylindrical can body (6).

10. Plant according to claim 9, characterized in that a decorating film application device (18) is arranged after the ironing device (38, 39, 42), with which a decorative film is arranged on the cylindrical outer surface of the can body (6). which preferably comprises at least one sealing head (26) with at least one substantially ring-shaped or with at least two partially ring-shaped sealing press surfaces (27a) and thus the decorative film in an annular sealing area on the can body (6) that adjoins the open end face of the cylindrical can body (6) 6) seals.

11. Plant according to claim 9 or 10, characterized in that a deformation device (20) for deforming the can body shell in the region of the open end face of the cylindrical can body (6) is provided, which preferably with at least one spin flow necking device a deformation to a standard opening, in particular for a valve receptacle, can be carried out.

12. Plant according to one of claims 9 to 11, characterized in that the reforming device (38, 39, 40) and / or the ironing device (38, 39, 42) and / or parts of the decorative film application device (18), in particular the at least one sealing head (26) and / or the at least one necking device are assigned to a rotary table device and the processing of the cups (3) or the can body (6) by means of parts rotating with the cups (3) or the can body he follows.