DE60302795T2 - METHOD AND DEVICE FOR PRODUCING A TUBULAR PACKAGING - Google Patents

Abstract

The invention concerns a method and an installation for making a tubular package comprising a flexible, fragile and sealed inner sleeve and an outer cardboard body provided with a precut and closed at both ends by two seals. The method for forming the sleeve consists in sealing the two longitudinal ends of the material ( 1 ) exiting from the bobbin ( 1 ) and passing through a shaping unit ( 3 ) enclosing a mandrel ( 4 ); glueing on the sleeve a cardboard ( 6 ) with a satellite device ( 9 ); cutting out the tube(s) obtained with a device ( 12, 13 ) and sealing one of the ends of the package; filling the package with the product to be packaged and sealing the other end. The resulting package is perfectly sealed and can be open by pressing on the cardboard proximate the precut of the tube thereby rupturing the sleeve and opening the package. Such type of package is designed for packaging oblong products.

Description

The current The invention relates to a manufacturing method of a tubular packaging, the from an inner shell from dense, brittle and flexible material and consists of an outer body made of cardboard, the at both ends with two closures is closed. Around the opening To facilitate packaging, the outer body between the two closures one aperture cut pre-cut across the center line of the can to this invention also relates to a device for carrying out the method.

The composite tube-shaped package which is most commonly used consists of a body of rigid material constituted by one or more layers of cardboard, an external label and an inner laminated complex material which, on the one hand, seals the packaging and, on the other hand, to ensure the compatibility of this complex with the conditioned product. Very often, this complex consists of a paper layer, an aluminum layer and a protective coating, which allows a neutral contact between aluminum and product as well as it in the patent FR 2771334 is described. These packages often have a metallic bottom, which is bordered on the body after filling. The lid is often made of an aluminum membrane, which assures the seal of the can, and a pressed or encapsulated plastic lid, which on the one hand, ensures the protection of the membrane from use and, on the other hand, the sealing of the packaging after removal of the membrane.

These Type of packaging the different materials for the production of the main body, the soil, of the lid and the protective membrane have a relatively high Cost and provide ecological Problems especially for disposal. In fact, to make these packages, if you use a system of shaping the body, you usually bring it an aluminum membrane, with or without a slight opening system fitted. On this membrane is set a molded plastic lid, from considerable weight to achieve sufficient rigidity. The sealing after replenishment created by the version of a metallic floor (steel, tinplate or Aluminum), which is also made on heavy and complex machines becomes. So get a solid but expensive packaging that reuses it, as a result of the different building materials of which it is made quasi-impossible. Furthermore are the opening systems always moored on the top of the can, which is the template of the Product, e.g. Salt sticks or long biscuits not possible.

The Goal of this present Invention is the above mentioned To eliminate disadvantages, thanks to a manufacturing process of a economic and ecological Packaging that is easy to recycle and it allows one very big Number of Foods to Pack Industrial Products, especially products submitted after removal of the lid so should be that they protrude from the can body.

• • die innere Hülle wird durch die Versieglung der beiden längslaufenden Seiten des aus einer Rolle herauskommendes Materials geformt, das durch ein Formungssystem läuft und die rohrförmige Formung der Hülle ergibt;
• • man klebt einen Karton auf die innere Hülle, dessen Breite dem Umfang der Verpackung entspricht und dessen Länge der Höhe der Verpackung oder einem ganzzahligen vielfachen der Höhe der Verpackung entspricht;
• • man schneidet die ergebene(n) Dose(n) aus;
• • man verschließt die Verpackung an einem ihrer Enden dicht;
• • man füllt die Verpackung mit dem zu verpackenden Produkt, und verschließt das andere Ende ebenfalls dicht.

The procedure is characterized by the following stages of production:

• The inner shell is formed by the sealing of the two longitudinal sides of the material emerging from a roll, which passes through a molding system and gives the tubular shape of the shell;
• • a cardboard box is stuck to the inner envelope, the width of which corresponds to the size of the packaging and whose length corresponds to the height of the packaging or an integral multiple of the height of the packaging;
• • cut out the devoted box (s);
• • seal the packaging tightly at one of its ends;
• • Fill the packaging with the product to be packaged and close the other end as well.

The Advantages of packaging according to this method are the following. Because the case within the external body You can stick it, by pressing on the intersection by the external one body slightly squeezing, the Shell and break up the pruning at the same time. Then, by pulling apart the two body parts, receives One can split the two parts of the packaging, and you can thus the packaged product, usually an oblong Offer product that protrudes from the lower part of the body. The dense and fragile Copy of the case, allows this execution, with assurance of a perfect tightness and proof of full closure of the Packaging before the first opening.

When Variant can also, in the inner part of the box and according to the pre-cut opening line of the outer body, one Seal or glue flange ring made of flexible material.

Of the The advantage of this flange ring is that it can be opened up, easy to close the packaging again. A relative tightness is also insured in this way, because the higher part of Packaging can wrap around the flange ring.

According to another variant, the shaping of the tube, especially the envelope and the attachment of the outer carton and the pre-cutting in individual cans are uninterrupted and in synchronism, which ensures good performance of the system.

Of course it is it is possible these processes gradually.

The The invention also relates to the device of the process plant with a forming mandrel whose cross-section of the can to be formed corresponds; with a mandrel shaper to that of the Roll outgoing shell to shape; with conveyors the envelope, with sealing systems of the two longitudinal sides of the envelope; With a foliar supply system for shaping the outer body; With Supplying of an adhesive to the inner side of the s.g. Leaves; with devices that allow the s.g. Glue the sheet to the cover; with conveyors the formed can; with cut-off systems in individual packages; with sealing equipment one of the ends of the packing and the second end after filling.

These Facility allows the formation of the main part of the packaging and in particular the manufacture of the outer body, simultaneously by the Method, on the shell is glued. The method allows to encase the mandrel and stick the label sheet directly onto the sleeve.

To In one variant, the gluing systems of the s.g. label sheet on the case, out a first hollow cylinder, starting from two generators with a row radial holes equipped, which communicates with two individual vacuum chamber stand. Here corresponds to the peripheral distance of the two generators at least about the width of the leaves. The o.g.

hollow cylinder is mounted on a plant, which on the one hand enables to press him against the thorn, and on the other hand him on the o.g. Thorn with the shell to roll.

Of the The advantage of this hollow cylinder is that it allows one of the blade ends that the elongated one Connection of the tube will form, capture, by the emptiness in one of the rooms activated. To do this, he also allows the carton gradually to the To grasp vacuum cylinder while this further rotates about its axis and when the second end of the When the cylinder arrives, the empty room becomes the second room activated, which allows the box with the glued outside to press against the cylinder.

After that, if you put the cylinder with the case presses against the thorn, roll the cardboard over by sticking it directly onto the cover, in that the hollow cylinder directly on the mandrel and consequently also on the shell rolls.

To In one variant, the systems exist which enable the o.g. hollow cylinder to press on the spike and let him roll, from two concentric with the thorn turntables, by a Nachformungssystem to be molded body doses Bear camps, the o.g. Also wear hollow cylinder.

These Enable facilities turn the hollow cylinder around the mandrel by 360 °.

To a variant is the o.g. Post-forming system for each plate from two winds that allow the o.g. Cylinder to approach or remove the spike, and against him the side surface hold the spike to allow him to roll on the spine.

To an advanced variant, the whole of the system is synchronized, to work continuously. The foliar supply system, the gluing machine, the pressing device of the sheet against the mandrel and the cutting device are in individual cans mounted on trolleys equipped with fixtures they moved backwards and forwards in predetermined positions can be.

To another variant, is the application of the former and the device, which allows to press the hollow cylinder against the mandrel, so constructed that the Compounds obtained along the shell, at least about 180 degrees those of the outer body opposite are.

Finally, after a preferred embodiment, the device consists of a system that allows a flange ring work inside the box and seal or glue.

The The invention will be described in more detail with the aid of the attached drawing described.

1 is a schematic representation of a device for the tubular packaging.

2 is a variant of the shape of the spine.

3 . 4 and 5 show the device that allows the cardboard sheet to roll over the sleeve from the side.

6 is a cross-sectional view of the finished package.

7 shows the use of this packaging and in particular the opening.

With the help of 1 Now you will describe the main stages of the process.

A role 1 A flexible and brittle material consisting of a dense film, such as aluminum or plastic protective film, onto which a varnished sealant or plastic such as polyethylene is placed, becomes an unwinding system 2 fixed. This material will form the shell. The shaping of the shell is done by a former 3 get that a thorn 4 includes. The envelope thus formed is driven by two belt pulleys (not shown) which are driven by a motor and set immediately after the forming system on either side of the mandrel. In the molding system 3 you create the bending of the flexible material on itself, to put it against the sealing layer, and thus to obtain a tight envelope. The sealing is at the exit of the molding system by a sealing device 5 manufactured by heat, ultrasonic or high frequency line. The thus formed tight envelope is through the belt skids on the mandrel 4 driven.

After the sealer there are a lot of cardboard sheets 6 with pruning. In this illustration, every leaf exists 6 from a carton having a length corresponding to two packages. But, of course, the number of packages that can be made with one sheet depends on the size of the packages, and on the choices made at the beginning

According to size, one can thus form one or more packages from each sheet. The leaf storage room 6 is mounted opposite the forming system of the blades, and a single-supply system removes the label sheets in the bearing to guide them to a sizing system consisting of two cylinders 7 and 8th consists. On each leaf page 6 which is to be pressed directly onto the envelope is by cylinder 7 an adhesive applied. At the exit of the gluing system 7 . 8th , the sheet is passed through a hollow cylinder 9 led, on two generators with rows of holes 10 is equipped (on the presentation you can see only one row of holes). Each row of holes is connected to a vacuum room located inside the cylinder. The vacuum rooms are operated by a single slide system. When the sheet end 6 the first row of holes 10 reaches, the emptiness arises in the corresponding room, and then the end of the page is against cylinder 9 pressed. Then the cylinder turns 9 around its axis, and when the other end of the blade reaches the second row of holes, the void also arises, and the blade then remains completely against cylinders 9 pressed, held by the void It is obvious that the distance between both holes rich at least approximately corresponds to the width of the used sheet. From this stage onwards, the sheet glued on the outside is replaced by cylinders 9 which will first move against the shell already on the mandrel and will roll against that shell to lay the sheet on it. If the cylinder 9 along one of the blade ends comes into contact with the shell, the corresponding vacuum chamber is turned off, so that the end of the sheet can remain in contact with the shell. As the cylinder unrolls around the sleeve, the second end of the blade comes into contact with the sleeve, which particularly overlaps the already glued end. Then you turn off the second vacuum room, leaving the second on the first glued end.

The functioning of cylinder 9 you will be in detail 3 to 5 , describe.

Thereafter, the tube thus obtained is taken over by belt slips h (like those at the exit of the forming system and not shown) around the pipe to a knife cutting equipment 13 advance. When the part of the pipe arrives to the device, which is mounted on a carriage, the counter roll lie down 12 and knives on the sheath and turn around the tube to dismember the sheet of rolled-up cardboard and to cut the sheath sticking to the cardboard. Once the knives have made a full turn, cylinders will move away 12 and knives 13 and the car comes back to its place for the next stage. At the exit you get tubes 14 which form the main body of the package.

2 we have shown a variant of a tube obtained by a similar device, ie an approximately rectangular box. If you want to get such a package, the thorn becomes 4 have a corresponding shape. By this device can be obtained virtually any desired shape, it is sufficient to have a thorn, which has the desired shape.

But you have to realize that if you leaf 6 over the sleeve, ensure that the cover of the two glued ends of the sleeve are opposite the two ends of the box to cancel the deformation constraints and also to avoid the formation of superimposed beads.

The various stages described above can be stepped, that is, after the shell has been formed, when it arrives at the vacuum chamber gluing system of the cardboard sheets, the device will turn itself off until the board is glued. After that, the shell comes across the knife, you stop and so on. Another possibility is to work uninterrupted, and in this case, there are leaves 6 , the gluing system 7 . 8th , the vacuum cylinder 9 and the knife system 12 . 13 on wagon after the Envelop the envelope so that the procedure can be conducted in synchronism. So these cars perform back and forth between two predetermined positions.

Now you are using 3 . 4 and 5 describe the device of insertion of the box on the cover.

3 on the part of a device has been shown, which in principle consists of two concentric plates 15 with thorn 4 consists of both ends of the hollow cylinder 9 wear.

The hollow cylinder 9 lies on two camps 16 one on each end. camp 16 be through two winds 17 worn on a support 18 were erected, and support 18 is with the plate 15 connected.

3 you have shown the starting position. You can see the glue cylinder 7 , in contact with a cylinder 7 ' putting the glue in a jar himself 7 '' takes. leaf 6 , with its glued inside, comes in the direction of the hollow cylinder 9 , and if the end of the sheet the first row of holes 10 reached, the corresponding vacuum chamber (not shown) is activated, and the end of the sheet is pressed against the cylinder. Then cylinder turns 9 in the direction of the arrow, and pulls sheet 6 with held by its end against the cylinder because of the aspiration through the holes 10 is pressed. If the second end of the sheet is the other row of holes 10 reached (see 4 ), the corresponding vacuum room is also activated, and then leaves 6 against cylinders 9 pressed. Both winds are at this stage 17 activated, and cylinder 9 against thorn 4 who wears the sleeve, put on. Once the contact between cylinder 6 and thorn 4 is performed, the corresponding row of holes 10 turned off, which allows to receive gluing of the end of a sheet with a cover. Then, as in 5 shown, turn the plate 15 in the direction of the arrow 360 ° around the thorn 4 , and so you get the rolling of the cylinder 9 against the thorn 4 , This allows the cardboard sheet to be glued to the sleeve while the cylinder 9 always rolls in the direction of the indicated arrow of the drawing. When the second end of the sheet arrives in cover of the first end, the second row of holes is turned off, allowing the end of the sheet to stick to the first one. Thus, the operation of adhering the carton to the case arises. After that, remove the winds 17 the cylinder 9 , and the process can begin again with the following sheet.

As previously mentioned, can these operations either in synchronism with the feed of the Shell furnished be because the device is mounted on a car, which is moved parallel and at the speed of the shell; or done in stage, and in this case, the device does not become the introduction of the carton onto the envelope moved laterally, and the knives are then opposite the Vacuum cylinder used.

If the mandrel has a different shape, such as those 2 , the cylinder becomes 9 Follow the outline of the thorn, as the winds 17 allow to adapt to the profile.

One refers to now 6 which represents a cross-section of a package. The can body obtained by this method 20 consists of the inner shell 21 and the outer carton 22 , He is placed on a rotatable plate to the higher cap 23 as well as the optional introduction of an inner flange ring 24 , The flange ring 24 , which is first made of flexible cardboard, and is lubricated in shape and on the inner dimensions with a sealed product is introduced to the lower part. The cardboard flange ring is then glued or sealed to the base 25 by a stamp, in addition to the cutting 26 is heated, where the opening of the box will be. The flange ring is thus located and put on the cutting line for about half and on the surface for the other half. Its position and profile make it possible to insure the location of the lid after the opening of the can when the totality of the packaged products is not needed.

For the higher closure, becomes a cardboard board 32 from a similar box, or identical to the one used for the body, with a protective film 27 or sealing plastic laminated and cut into shape. He is at the same time made on the shape of the box and put in the can. A tool that has been equipped with a sealing system by heat conduction, ultrasonic or radio frequency, densely covers the obtained closure 23 to their position, with their side directly against that of the body and in particular sheath 21 glued. Then one causes the rolling up of the can, ie the end of the body 22 to bend in the direction of the interior, then you strongly presses for a good maintenance of the closure 23 to insure. After that, the can is sent to the filling station, and after the weight control or other controls have been performed, place the bottom closure 28 out of a cardboard plate 29 that exists with a protective film 30 order 27 was equipped. Then, as before, this seal is sealed at the bottom of the can. Before this seal is obtained, it is necessary to create a slight void in the can to compress the volume created by the bottom.

The box will be with you 7 on ver shown on different pages. The can with body 22 and pruning 19 will with notice 30 in 31 Desirably, where the consumer should, for example, press with his thumb to obtain the crack of the cut and, at the same time, the tear of the inner wrap, as shown in the second illustration. The indication of the point to be impressed is arbitrary, but preferably not in the places where the longitudinal connection of the shell and the outer body are.

If you start this opening it is sufficient to easily on the higher part of the package too pull to the full Cracked to get the pruning, both from the cardboard as from the inner on the body glued shell. The opening thus obtained the packaging allows the product to be seen.

The flange ring 24 If you have not completely emptied the packaging, put the lid back in place so that the closure remains almost tight.

Claims (10)

Method for producing a tubular packaging which consists of an inner envelope ( 21 ) of dense, brittle and flexible material and an outer body of cardboard ( 6 ), which at both ends with two closures ( 23 . 28 ) and which between the two closures a pre-cut transverse to the center line of the can opening ( 26 ) in order to facilitate the opening of the package, characterized by the following stages of production: 21 ) by both longitudinal sides of a roll ( 1 ), wherein the tubular shaping of the envelope by means of a former ( 3 ) is formed; • you stick to the inner shell ( 21 ) a box ( 6 ) whose width corresponds to the periphery of the package and whose length corresponds to the height of the package or an integral multiple of the height of the package; • one cuts the devoted can (s) ( 14 ) out; • seal the packaging tightly at one of its ends; • Fill the packaging with the product to be packaged, and close the other end as well. Method according to Claim 1, characterized in that the inner part of the can and the part of the pre-cut opening ( 26 ) of the outer body corresponds to a collar ( 24 ) of flexible material sealed or sticks. Process according to Claim 1, characterized in that the shaping outlets of the packaging are cut into individual doses ( 14 ) continuously and in synchronism. Plant according to claim 1, provided with a shaping mandrel ( 4 ) whose oblique section corresponds to the shape of the can to be formed, with a former ( 3 ) which is set around the mandrel for shaping the envelope ( 21 ) starting from the roll ( 1 ), with transport devices of the envelope ( 11 ), with sealing devices ( 7 . 8th . 9 . 10 ) of two longitudinal ends of the envelope ( 21 ), with a foliar supply system ( 6 ) which are used for shaping the outer body, with mounting devices ( 7 . 7 ' . 7 '' ) of an adhesive on the inner side of said sheets ( 6 ), with devices ( 15 . 16 . 17 . 18 ) which allow said sheet ( 6 ) against the shell ( 21 ), with transport devices ( 11 ) of the formed can, with cut-out devices ( 12 . 13 ) into individual packages, with sealing devices of one of the packaging ends and the second end after filling. Plant according to claim 4, characterized in that the attachment device of said sheet bears against the casing a first hollow cylinder ( 9 ), corresponding to two generators, with a series of radial holes ( 10 ) associated with two individual vacuum chambers, is provided by the peripheral removal of two generators at least approximately the width of the sheets ( 6 ) by said hollow cylinder ( 9 ) to a device ( 15 . 16 . 17 . 18 ), which, on the one hand, allows it to be pressed against the mandrel ( 4 ) and, on the other hand, place it on the said thorn with the sheath ( 21 ) to let roll. Installation according to claim 5, characterized in that the devices enabling the said hollow cylinder ( 9 ) on the thorn ( 4 ) and let it roll, two turntables ( 15 ) concentric with the mandrel ( 4 ) and which, with a copying system ( 17 ) of the can body shape to be formed, bearings ( 16 ) carrying the said hollow cylinder ( 9 ) wear. Plant according to claim 6, characterized in that the said copying device for each plate ( 15 ) from two winds ( 17 ), which enable said cylinder ( 9 ) the thorn ( 4 ) or to remove it from the mandrel and to hold it against the lateral surface of the mandrel to allow it to roll on the spine. Installation according to one of claims 4 to 7, characterized in that the whole of the abutment devices are synchronized in order to be able to work continuously, the foliar supply system, the adhesive application device and the device for pressing the leaf against the The mandrel and the cutting device in individual cans are mounted on carriages equipped with devices for shifting back and forth between predetermined positions. Plant according to one of claims 4 to 8, characterized in that the application of the former ( 3 ) and the device ( 15 . 16 . 17 . 18 ), which allows the hollow cylinder ( 9 ) against the thorn ( 4 ) is positioned so that the seals obtained along the shell and that of the outer body are at least approximately 180 degrees opposite each other. Plant according to one of claims 4 to 9, characterized in that it comprises a device for clamping a collar ( 24 ) within the box and to seal or glue.