EP1338356A2 - Method and device for making a pressure container - Google Patents

Abstract

The method involves producing an essentially cylindrical semi-finished product (2,4) with a first diameter and a first end with an opening, deforming the open end into a narrowing mouth piece that can be sealed by a pressure valve by pulling in and bending over the edge of the opening, reducing its diameter to a second diameter and coating the edge of the opening in a surface region (26) for sealed accommodation of the pressure valve with lacquer. AN Independent claim is also included for the following: an arrangement for manufacturing pressure packaging.

Description

The invention relates to a method for producing a pressure pack according to the The preamble of claim 1 appended here and an apparatus for producing a Pressure pack according to the preamble of claim 13 appended hereto Methods and such a device are known from WO 99/20413.

Pressure packs are mostly used as aerosol cans, also called spray cans. They are generally essentially cylindrical in shape and have a tapered shape Mouthpiece that by means of a pressure valve or aerosol valve, through which the Filling is dispensed, is closed. The opening of the pressure packs with the Pressure valves are closed to an inch, i.e. H. 25.4 mm diameter standardized. On the market are so-called single-chamber pressure packs, which consist of a single, except for the valve opening, completely closed, mostly made of aluminum There are outer bodies, and so-called two-chamber pressure packs, as they are with the method can be produced according to the publication WO 99/20413 mentioned at the beginning. Two-chamber pressurized packages have an inner container inserted in the outer container, with propellant between the between through a hole in the bottom of the outer container Inner and outer container formed space can be filled.

To manufacture single-chamber pressure packs, one is first made from an aluminum blank Pressed substantially cylindrical blank, which at its end which later forms the mouthpiece, runs out cylindrically. This pressure pack blank is then painted outside and inside and usually already with the finished one Label the packaging and the finished package design. After that it will open ends formed into the tapered mouthpiece in a pull-in process from the first diameter determined by the diameter of the pressure pack tapered to the standardized valve opening width. During the pulling process, the edge flanged the valve opening. For this reason, the valve opening is still open pressure pack delivered to the bottler a flange at the edge of the valve opening or Mouthpiece opening. After filling, the valve seals around the flange put on and clinched.

With the two-chamber pressure pack, the cylindrical blank of the outer container is inserted an inner container is used, as described in WO 99/20423. With the two-chamber pressure pack WO 99/20423 the inner container is a soft annealed aluminum bag, which expanded at its opening edge and with which the opening of the Outer edge of the container is connected by gluing. The so together connected edges of the inner and outer containers then together become the Mouthpiece retracted and flanged. Again, before the threading and flanging process - more precisely before inserting the inner container - the outer container blank already painted, since the painting after the flanging process can hardly be handled would. For the same reason, the inner bag before the pull-in and Flanging process painted. The procedures described above and trained accordingly Devices for the production of pressure packs have in particular smaller pressure pack diameters have proven their worth. By default, the procedure according to WO 99/20413 pressure packs with a total outer diameter of 40 mm and a mouth opening inner diameter of one inch, d. H. 25.4 mm without Problems created in large numbers.

However, there are problems with larger pressure pack diameters, from approx. 45 mm. So results with a pressure pack outer diameter of 50 mm and the standard Valve opening of 25.4 mm after placing the valve when performing the known Manufacturing process to 60 - 70% a leaky and therefore unusable pressure pack. There are generally tightness problems with material warping, such as with a larger narrowing of the mouth openings or for other reasons such as larger ones Material thicknesses or different material properties occur.

In general, it is an object of the invention to provide a method according to the preamble of Claim 1 and a device according to the preamble of the appended claim 13 available, with which pressure packs in large series with smaller Sealing problems can be produced, especially when the ratio Pressure pack diameter to valve opening diameter is larger than usual.

Advantageously, the method according to the preamble of appended claim 1 and the device according to the preamble of the appended Claim 13 can be improved in such a way that pressure packs e.g. with bigger Outside diameter and standard valve opening diameter or Large-scale pressure packs with smaller valve opening diameters without leaks are producible.

This object is achieved by a method with the features of the appended claim 1 and a device with the features of the appended claim 13 solved.

Advantageous embodiments of the invention are the subject of the dependent claims.

The invention thus provides a method for producing a pressure pack in which First, a blank of a substantially cylindrical shape with a first diameter - which determines the outer diameter of the pressure pack - and provided with an apertured open end, d. H. in particular is made in the usual way and then the open end becomes one tapering mouthpiece which can be sealed by a pressure valve by pulling in and crimping the edge of the printing package blank bordering the opening becomes. With this shaping of the mouthpiece the diameter of the opening starting from the first diameter to a smaller second diameter, the corresponds in particular to the standard valve opening width of 25.4 mm. According to the invention, the one in the molding process of the mouthpiece then becomes one Bead shaped edge on its intended for sealing detection of the pressure valve Surface area coated with a varnish.

Experiments have shown that by the refinishing according to the invention 100% sealing is achievable and thus the previously detectable high failures can be avoided by leakage.

The inventor recognized that with a large reduction, as with cans with larger ones Diameters and standard valve opening width occur, bumps on the flange occur in the form of folds and cracks in the surface of the flare. This Problem intensifies with a two-chamber pressure pack, especially in the area to be crimped Edge area a composite material is present. This initially consists of a hard or relatively hard outer container, then mostly made of elastic adhesives, with which the outer container and the inner container is connected, and third from the soft annealed inner bag. The materials differ in the flanging so that very fine cracks and unevenness occur in the surface. The cracks are usually only visible under the microscope, but in some cases they also occur strongly that they are also visible to the normal eye. Those in the micrometer range lying cracks can be caused by the usually inserted in the top of the pressure valve Rubber seal can no longer be sealed.

But is the area of the flange to be sealed as proposed according to the invention repainted, the paint flows into these bumps, so that again one creates a flat surface that can be easily sealed.

Preliminary experiments have also been attempted by reducing the size of one large surface irregularities and - caused on a small diameter equalize cracks by milling or rolling alone. Such exciting editing however, there is a material weakness that affects the tightness rate unfavorably effect. In addition, such a processing is carried out before the forming of the Removed surface protection layer applied to the mouthpiece, making it aggressive Corrosion can occur. In the case of two-chamber pressure packs, the material is removed Machining even less suitable, since here the material removal on the weak inner bag occurs just where it is sealingly connected to the outer bag is.

However, if the area to be sealed is repainted according to the invention, full areas can be obtained Achieve tightness without the aforementioned problems.

Because print packs with high quantities per minute (more than 100 pieces per minute) should be manufactured, the repainting should be done very quickly. In addition, the Do not melt the paint itself in such a way that unwanted unevenness occurs. this will According to an advantageous embodiment of the invention achieved in that the flange coated with a varnish with such a short curing time and in such a small thickness is that the applied lacquer layer in a second or less, preferably in cured for about half a second or less.

Particularly short curing times can be achieved if a UV varnish is used as the varnish is used, which is exposed to UV radiation after application to the flange becomes. Such UV varnishes have the special feature that they are exposed to ultraviolet radiation Harden light immediately. For example, one based on UV-crosslinked acrylic resins built-up paint used.

It is also advantageous if a particularly low-viscosity lacquer is used, the when applied quickly flows into any unevenness and the flare due to adhesion well wetted. A varnish with a viscosity of 15-40 sec is advantageously used here. preferably used for about 25 seconds, here the viscosity according to DIN 53211 with the Time is specified that the varnish at 20 ° C for the outflow from the DIN cup of 4 mm needed. The measurement of this expiration time with diving cups is due to the simple Handling in practice as a standard test method for determining viscosity of paints used in production and incoming goods inspection. The varnish is preferred applied very thinly, for example with a layer thickness of approx. 1-10 µm and in particular with a layer thickness of 2-3 µm. The application of the varnish can by spraying, rolling, dipping, painting. Preferably for application of the varnish of the bead is brought into contact with a material wetted with varnish. The Material is preferably elastic, so that there is good contact at any point on the surface to be wetted Surface is ensured. Suitable materials are felt, foam or Rubber, with felt or foam preferred for its liquid-absorbing effect are. If, as is further preferred, the material wetted with lacquer and the this contacting pressure pack moves relative to each other during contact This has the advantage that the varnish literally in the unevenness to be leveled is smeared in or pushed in. This is preferably done with Paint wetted material rotated relative to the bead.

In the event that particularly large bumps occur, it can be advantageous to use the Milling the flange before applying the varnish. Under certain circumstances, this also affects the adhesiveness of the paint enlarged. The process can also be used to print such packs seal securely, the mouthpiece of which is larger than 45 mm, for example a diameter of approx. 50 mm - minus if necessary the wall thickness of the blank - to the standard valve opening diameter size of about 25.4 mm (1 inch) is reduced.

The method according to the invention is particularly well suited for two-chamber pressure packs, in which the pressure pack blank consists of an outer container and a inner container used in the manufacture of the pressure pack blank So an inner container inserted into the outer container and in the area of the edge of the Opening is connected to the outer container. The procedure is also for those Two-chamber pressure packs, in which the inner container and the outer container in the area of the edge to be flanged with an elastic adhesive be connected, because then in the area of the flare a mix of hard materials Material (outer container), elastic material (adhesive) and soft material (soft annealed Inner container) exists, which tends to wrinkle when flanging.

The device according to the invention for producing the pressure pack and for carrying it out of the method according to the invention has, as is already in use, pressure pack manufacturing devices a provision device for providing the substantially cylindrical pressure chamber blank with an opening at its open end is provided with a still wide first diameter, and a pulling and flanging device, by means of which the edge of the pressure chamber blank bordering the opening to the tapered mouthpiece while reducing the opening from the first diameter to the standard smaller diameter and is flanged. According to the invention is further in the conveying direction of the pressure chamber blanks after the pulling-in and flanging device or after tools of the same Paint application device is provided, by means of which paint on the through the retracting and Beading device can be applied to a beaded edge.

In a preferred embodiment, the pressure pack manufacturing device also has a UV lamp for curing a UV lacquer applied by the lacquer application device. Further preferred is the paint application device with a body wetted with paint provided, which can be brought into contact with the flange. The body is preferably composed made of absorbent and / or elastic material such as felt, foam or rubber. In In a preferred embodiment, a relative movement device ensures a relative movement the body and the flange to be painted. This is preferably by means of a rotating device for rotating the body relative to the pressure packs to be coated with varnish educated. More preferably, the paint application device also has one by means of a Valve, such as needle valve, controllable paint supply device for continuous Feeding the paint to the body or to track a used one Quantity of paint. In the event that the manufacturing device and / or the paint application device should be stopped for any reason is preferred automatically the paint supply device is blocked, with the result that the paint flows away to prevent irregular paint thicknesses on the application unit.

The entire manufacturing device is preferably used as an automatic manufacturing system or a part of it is formed, which is controlled fully automatically by means of a control. Accordingly, the individual devices of the device are controlled automatically.

It is particularly preferred that the paint application device is connected to a row of tools of the drawing-in and flanging device like another tool of the same is provided. Such tools are usually equidistant to each other so that they successively reshape a series of pressure packs can determine which pressure packs are conveyed to the next tool become. The tool carrier with the row of tools is relative for flanging to a holding and conveying device in which the row of pressure pack blanks preferably kept equidistant and transported from station to station, around all tools at the same time with their respective blanks for processing to engage. The paint application device can then be moved with the same movement engages with the molded package to be painted bring. The UV lamp could also be used as another tool on the paint application device connect as another station.

The paint application device preferably has a housing and a housing thereon or therein housed paint application disk, the paint application disk relative to the housing is rotatable by means of a motor, for example a servo motor. Preferred speed ranges for the motor are 30-300 rpm. The housing is further preferably on its end facing the pressure pack blanks is cup-shaped and grips around the rotatable paint application disc, so that its edges are completely are encompassed by the housing. This way, the paint application disc dripping paint caught in the housing. Only a flat area of the paint application disc is then accessible to the blank blanks. This indicates the End of the housing to be turned towards the pressure pack blanks further preferably has one conically tapering and thus centering insertion opening, by means of which to be painted Mouthpieces can be recorded precisely. The insertion opening also preferably forms a stop for these mouthpieces, so that these in contact the paint application disc in a precisely defined position and apply an even paint application is guaranteed. The insertion opening is, for example, in one at this end placed on a housing base body housing cover, which for Replacement of a body made of absorbent material applied to the paint application disc Material is held detachably on the housing. The provided with absorbent material Paint application disk is preferably rotatable about a horizontal axis of rotation. Above the Paint application disc, more precisely above the absorbent material, is further preferred the paint supply device is provided on the housing, the paint from a dosing unit precisely dosed amount to the paint application disc. From the paint application disc Dripping and thus superfluous paint can be preferred by using a below of the absorbent material remove the drain device.

Embodiments of the invention are described below with reference to the attached one Drawings explained in more detail.

Fig. 1

einen als Zylinder geformten Druckpackungsrohling in einer ersten Ausführungsform;

Fig.2

einen als Zylinder geformten Druckpackungsrohling nach einer zweiten Ausführungsform;

Fig. 3

den noch nicht durch ein Ventil verschlossenen Mundstückbereich einer aus einer der Druckpackungsrohlingen nach Fig. 1 oder Fig. 2 durch einen Einzieh- und Umbördelprozess geformten Druckpackung;

Fig. 4

den Mundstückbereich der Druckpackung nach Fig. 3 mit partiell lackiertem Bördel;

Fig. 5

eine Schnittansicht einer Lackauftrageeinrichtung zum Nachlackieren des Bördels von Fig. 4; und

Fig. 6

eine Prinzipskizze einer Herstellvorrichtung für Druckpackungen, in der die Lackauftrageeinrichtung nach Fig. 5 eingesetzt ist.

In it show:

Fig. 1

a cylinder shaped pressure pack blank in a first embodiment;

Fig.2

a cylinder-shaped pressure pack blank according to a second embodiment;

Fig. 3

the mouthpiece area not yet closed by a valve of a pressure pack formed from one of the pressure pack blanks according to FIG. 1 or FIG. 2 by a pulling-in and flanging process;

Fig. 4

the mouthpiece area of the pressure pack according to Figure 3 with partially painted flange.

Fig. 5

a sectional view of a paint application device for repainting the flange of Fig. 4; and

Fig. 6

a schematic diagram of a manufacturing device for pressure packs, in which the paint application device according to FIG. 5 is used.

In the following, with reference to FIGS. 1 to 4, a method for producing a Pressure pack described, in which a mouth opening of the pressure pack framing bead for the purpose of a perfectly sealing closure with a Dispensing valve is repainted. To produce the pressure pack, first a Printing package blank, as shown in FIG. 1 with reference number 2 in a first embodiment and in FIG. 2 with the reference number 4 in a second embodiment is shown.

1 shows a pressure pack blank 2 for producing a single-chamber pressure pack and FIG. 2 shows a pressure pack blank 4 for producing a two-chamber pressure pack. The pressure pack tube blank 2 shown in Fig. 1 for producing a A single-chamber pressure pack consists of an essentially cylindrical one External container 6 made of aluminum, the cylinder jacket 8 already the later Outside diameter of the first to determine the pressure pack to be produced Has (inner) diameter D1. The printing package blank 2 is through at one end closed a bottom 10 and completely forming an opening 14 at the other end 12 open. In the case of pressure packs, the base 10 is usually curved inwards, but shown here for the sake of simplicity. The opening 14 has the pressure Packing blanks 2, 4 also have the first diameter D1 as the opening width. The outer container 6 is made of aluminum. To do this, it is made from an aluminum disc (not shown) brought into the shape shown in FIG. 1 by cold working. In this form the cylinder jacket 8 is provided on the outside with the color design desired by the customer and provided with an interior protective lacquer on the inside.

The pressure pack blank shown in FIG. 2 for producing a two-chamber pressure pack also has the outer container 6 previously described with reference to FIG. 1, the same reference numerals designating the same parts as in the first embodiment. In the outer container 6 is an inner container also referred to as an inner bag 16 made of soft annealed aluminum. At the edge of the opening 14 Edge 18 is the inner container 16 and the outer container 6 together by an adhesive firmly connected. The production of the pressure pack blank 4 takes place in the in of WO 99/20413 described manner in which document hereby in its entirety is referred. Before inserting and widening the inner container 16, this is provided with an interior protective varnish on the inside.

The edge region 18 of the printing package blanks is then used to produce a printing package 2 or 4 brought into the form shown in Fig. 3. The edge 18 Edge region 20 of the open end 12 of the pressure pack blank 2, 4 is covered by a Pull-in process for one starting from the first diameter D1 for one standardized second smaller diameter D2 tapered mouthpiece 22 shaped. The edge 18 is formed into a flange 24 by flanging. at In the example shown here, the second diameter D2 is one inch, i.e. approximately 25.4 mm, the first diameter D1 being more than 45 mm, around an outer diameter to form the pressure pack of about 50 mm or more. The now scaled down Opening 14, which is bordered by the flange 24, is standardized to the diameter D2, to the usual bottling plants and in particular to delivery valves, such as Aerosol valves (not shown) with which the opening 14 'after filling the Pressure pack is sealed to be compatible. The ones from the blister packs 2, 4 formed pressure packs tend to larger D1 at the first Flare to bumps, especially in the form of folds and cracks on the surface available. Such bumps occur particularly when d. H. on the mouthpiece 22, the edge region 20 and the edge 18 different material pairings can be used, as is the case with the blank 4 with the relatively hard outer container 6 made of aluminum, the elastic adhesive and the soft annealed Aluminum inner container 16 is the case. For this reason, this one provided methods that of a pull-in and formed by a pull-in machine Beading device supplied cylindrical pressure pack blanks 2, 4, as in previous also used, gradually drawn in up to the finished bead 24. In ener subsequent station, the flange 24 is in a for sealing with the dispensing valve certain sealing area 26 wetted with UV varnish 28, as shown in Fig. 4. The UV varnish 28 is then applied at a further station by means of a rather UV radiation source cured in no time.

In a further embodiment, not shown, the flange 24 is short beforehand roughened to achieve better paint adhesion or to level larger ones Bumps milled and then with a protective paint layer 30 from the UV varnish 28 provided.

In various embodiments, the application of the sealing lacquer layer 30 by spraying, rolling, dipping or painting. The application is preferably carried out the lacquer layer 30 by contacting a material wetting the lacquer 28, preferably felt, foam or rubber.

The refinishing of the flange 24 is D1 for all flange shapes and all diameters of one- and two-chamber pressure packs, in particular aerosol cans, can be used to Scoring, cracks, folds, paint peeling, etc. equalize in the sealing area 26.

The UV lacquer 28 is applied in a very thin lacquer layer 30 and then with the UV lamp hardened. The curing time of the UV varnish and the thickness of the coating layer chosen such that the curing time is approximately in the range of about half Second. This application of varnish is preferably carried out in the drawing-in and flanging device, So carried out for example in a drawing machine. The curing time is therefore set to such a short time, so high clock numbers of more than about 100 pieces per minute are possible. May also be instead of UV varnish other quickly curable paints are suitable for such cycle times. As a UV varnish 28 in a preferred embodiment, a lacquer based on UV-crosslinking acrylic resins of very high chemical resistance. The viscosity of the paint 28 is measured with the DIN cup 4 mm, 15- 40 sec (flow time from the cup), preferably 25 sec.

In the following, with reference to Fig. 5, a paint application device for application the lacquer layer 30 described on the flange 24. The paint application device 40 has a housing 42, a rotating device 44, a paint feed device 46, a through the rotating device 44 rotatable paint application disc 48 and a drain device 50 for superfluous paint.

The housing 42 is in a precise position with a positioning device formed by adjusting nuts 52 in a device for producing a pressure pack, in particular one Retracting and flanging device of the same, attachable. The housing 42 encloses for the most part the paint application disc 48, the one receiving the paint application disc 48 Space 54 at an end 56 of the housing that faces the pressure packs 42 with a housing cover 58 releasably attached to the basic housing body is covered. The housing cover 58 has a tapering centering insertion opening 60, which are used to precisely position and center the mouthpiece 22 serves.

The rotating device 44 comprises a servo motor which can be rotated at 30-300 rpm 62, which is supplied with energy and control commands via a cable feed 64.

The paint application disk 48 comprises a one placed on the axis of the servo motor 62 Driving plate 66 on which a body 68 for the lacquer application is fastened. The body 68 consists of elastic and / or absorbent material such as sponge or preferably Felt. The axis of rotation 70 of the servo motor 62 and the paint application disc 48 is horizontal arranged. The paint supply device is located above the paint application disk 48 46, which supplies paint 28 from a lockable metering unit. Below the paint application disc there is the drain device 50 for from the paint application disc 48 dripping unnecessary paint.

In the following, the device for producing the pressure will now be described with reference to FIG. 6 pack and for performing the previously explained method explained in whole.

The pressure pack manufacturing device 74 comprises a provision device 76 for provision the blanks 2 or 4, a pulling and flanging device for drawing in and flanging the edge 18 of the pressure chamber blanks bordering the opening 14 2, 4 to the tapered mouthpiece 22 and the lacquer application device 40th

The provision device 76 is essentially known, for example, from WO99 / 20413 and not interesting here, which is why it is only shown as a block.

The drawing-in and flanging device has a tool carrier 80 in the form of a fixed one Wheel with a number of retracting tools arranged here one after the other in a circle 82, which are each arranged at the same distance from one another. The pulling and flanging device 78 further comprises a holding and conveying device 84 for holding and conveying the pressure pack blanks 2, 4. The holding and conveying device 84 is in the form of a rotatable relative to the tool carrier 80 and axially movable wheel 86 formed on its circumference in corresponding receptacles 88 firmly holds the blank blanks. The wheel 86 of the holding and conveying device 84 rotates at a distance from the tool carrier 80 to the in the receptacles 88 held blister packs to move from one tool to the next and then moves axially toward the tool carrier 80 without rotating the pressure pack blanks 2, 4 with the individual drawing-in and flanging tools 82 to engage and then axially away from the tool carrier 80.

This is followed by the series of drawing-in and flanging tools 82 Paint application device 40, which is like another drawing tool on the tool carrier 80 is attached and to the metering unit 90, which by means of a controller 92 controlled valve 94 is lockable when the device 74 is stopped is. A paint receptacle 96 is connected to the drain device 50. As a further station after the lacquer application device is a UV lamp 98 for curing of the UV varnish 28 is provided.

In an embodiment not shown, the servo motor 62 is also outside of the Paint application device 40 arranged.

The function of the pressure chamber manufacturing device 74 is in manufacturing the 2 in such a way that initially in the provision device 76 the outer container 6 is manufactured and painted in the manner shown in FIG. 1 becomes. In a similar manner, the inner container 16 is manufactured and painted, then annealed, then expanded with an expanding tool and glue overdrawn. Then the outer container 6 is placed over the inner container 16, and then by further widening the inner container edge, the two containers 6, 16 glued together. Then the edges 18 in the retraction and Flanging device 78 retracted. There are a number of pulling tools for pulling in 82, with which the pressure pack blanks 4 are successively engaged become. The pressure pack blanks 4 are located in the large wheel 86 that is moved axially for curling. Rotation of the wheel 86 changes the blister packs 4 to the next tool 82. The tools 82 are also on one Arranged (fixed) wheel that forms the tool carrier 80. The series of Retracting tools 82 ultimately become the paint application device as a further tool 40 added. This has a felt or the like liquid-absorbent material (Body 68). The body 68 is slowly rotated by means of the electric motor 62. The body 68 picks up the paint 28. The turning means that the paint despite its high Viscosity remains evenly distributed. I.e. even if the device stops, Despite its relatively low viscosity, the varnish does not sink downwards, it is always uniform spread over the body 68. The paint 28 becomes the body 68 via the valve 94 directed. Once the system is stopped, valve 94 closes to shut off excessive paint avoid. By the axial movement of the wheel 86, the flange 24 is pressed Pressure chamber blank 4 briefly on the body 68, the flange 24 takes a corresponding one Quantity of paint 28. The paint application is so thin that the paint 28 due to adhesive forces despite the horizontal pressure pack layer evenly distributed on the flange 24 remains. Immediately afterwards, the paint-wetted bead 24 is fed to the UV lamp 98, which cures the paint 28 immediately. The then finished printing package then becomes Shipping to the bottler prepared. The seal with the dispensing valve is then from made to the bottler.

Claims (23)

A method of making a pressure pack, comprising the steps of: a) Providing, in particular manufacturing, a pressure pack blank (2, 4) of essentially cylindrical shape with a first diameter (D1) and with an opening (14) provided with an open end (12) and b) shaping the open end (12) into a tapering mouthpiece (22) which can be sealed by a pressure valve by drawing in and flanging the edge (18, 20) of the pressure pack blank (2, 4) bordering the opening (14), the diameter the opening is reduced from the first diameter (D1) to a smaller second diameter (D2),
characterized by the step after step b) c) coating the edge (18) surrounding the opening (14) to form a flange (24) on a surface area (26) intended for sealingly capturing the pressure valve with a lacquer. Method according to claim 1,
characterized in that the flange (24) is coated with a lacquer (28) with such a short curing time and in such a small thickness that the hardening time of the applied lacquer layer (30) is equal to or less than 1 second, preferably approximately 0.5 s or less. Method according to claim 1 or 2,
characterized in that a UV lacquer (28) is used as the lacquer, which is exposed to UV radiation after application to the flange (24). Method according to claim 3,
characterized in that a lacquer (28) based on UV-crosslinked acrylate resins is used. Method according to one of the preceding claims,
characterized in that a lacquer (28) with a viscosity of 15 to 40 s, preferably approx. 25 s, measured according to DIN 53211 with the DIN cup 4 mm is used. Method according to one of the preceding claims,
characterized in that the lacquer (28) is applied with a layer thickness of approximately 1 to 10 µm, in particular 2 to 3 µm. Method according to one of the preceding claims,
characterized in that the lacquer (28) is applied to the flange (24) by spraying, rolling, dipping, brushing or preferably by contacting the flange (24) with a material wetted with lacquer, in particular felt, foam or rubber. Method according to claim 7,
characterized in that the material wetted with lacquer and the pressure pack contacting it move relative to one another during contact, in particular are rotated relative to one another. Method according to one of the preceding claims,
characterized in that the flange (24) is milled before the lacquer is applied. Method according to one of the preceding claims,
characterized in that in step b) the opening (14) of the open end (12) has a first diameter (D1) greater than or equal to 45 mm, in particular approximately 50 mm, to a second diameter (D2) of approximately Is reduced by 25.4 mm. Method according to one of the preceding claims,
characterized in that in step a) or b) an inner container (16) is inserted into an outer container (6) of the pressure chamber blank (4) and is connected to the opening (14) in the region of the edge (18) thereof. A method according to claim 11,
characterized in that in step b) the edges of the outer container (6) and the inner container (16) inserted into the outer container (6), which are connected to one another in the region of the edge (18) of the opening (14), preferably by means of adhesive, are drawn in and flanged become. Device (74) for producing a pressure pack, with a provision device (76) for providing a substantially cylindrical pressure chamber blank (2, 4) which is provided at an open end (12) with an opening (14) with a first diameter (D1), a pulling and flanging device (78) for pulling and flanging the open end (12) of the pressure chamber blank (2, 4) to a tapering mouthpiece (22), marked by a lacquer application device (40) for applying lacquer to the edge (18) formed by the drawing-in and flanging device (78) to form a flange (24). Device according to claim 13,
marked by
a UV lamp (98) for curing a UV paint (28) applied by the paint application device (40). Device according to one of the preceding claims,
characterized in that the lacquer application device (40) has a body (68) wetted with lacquer (28) and engageable with the flange (24). Device according to claim 15,
characterized in that the body (68) is formed from absorbent and / or elastic material such as felt or foam or from rubber. Device according to one of claims 15 or 16,
marked by
a rotating device (44) for rotating the body (68) relative to the pressure packs to be coated with lacquer (28). Device according to one of the preceding claims,
characterized in that the paint application device (40) has a paint supply device (46), which can be blocked in particular by means of a valve (94), for the continuous supply of the paint (28) to the body (68). Device according to one of the preceding claims,
characterized in that the paint application device (40) is part of the drawing-in and flanging device (78). Device according to one of the preceding claims,
characterized in that the pulling and flanging device (78) has a tool carrier (80) with a series of pulling tools (82) for successively pulling in and flanging the edge (18),
that the tool carrier (80) and a holding and conveying device (84) for holding and conveying a row of printing package blanks (2, 4) are relatively movable towards and away from one another in order to successively move the insertion tools (82) with the individual through the holding and engaging conveyor means (84) held and conveyed blank blanks (2, 4), and
that the lacquer application device (40) is held on the tool carrier (80) like an additional tool following the row of drawing tools (82). Device according to one of the preceding claims,
characterized in that the paint application device (40) a housing (42) which can be fixed in its position, preferably via a position device (52), in particular with set screws or set nuts a paint application disc (48) which can be rotated relative to the housing (42) by means of a motor (62) at 30-300 rpm. having. Device according to claim 21,
characterized in that the housing (42) at its end (56) facing the pressure pack blanks (2, 4) engages over the lacquer application disc 848) at its edge and with a conically tapering, centering insertion opening (60) for receiving the mouthpieces to be lacquered () 22) is provided. Device according to claim 21 or 22,
characterized in that the lacquer application disc (48) provided with absorbent material rotates about a horizontal axis of rotation (70) and
that above the absorbent material on the housing (48) is a paint supply device (46) which supplies paint (28) from a metering unit (90), and below the absorbent material is a drain device (50) for superfluous paint (28) dripping from the absorbent material ) is provided.

Images