EP2219954B1 - Method and device for the production of a packaged unit - Google Patents

Method and device for the production of a packaged unit Download PDF

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Publication number
EP2219954B1
EP2219954B1 EP09740057A EP09740057A EP2219954B1 EP 2219954 B1 EP2219954 B1 EP 2219954B1 EP 09740057 A EP09740057 A EP 09740057A EP 09740057 A EP09740057 A EP 09740057A EP 2219954 B1 EP2219954 B1 EP 2219954B1
Authority
EP
European Patent Office
Prior art keywords
shrink film
product cluster
packaged unit
shrunk
product formation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP09740057A
Other languages
German (de)
French (fr)
Other versions
EP2219954A2 (en
Inventor
Werner Ageling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KHS GmbH
Original Assignee
KHS GmbH
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Filing date
Publication date
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Application filed by KHS GmbH filed Critical KHS GmbH
Priority to PL09740057T priority Critical patent/PL2219954T3/en
Priority to SI200930187T priority patent/SI2219954T1/en
Publication of EP2219954A2 publication Critical patent/EP2219954A2/en
Application granted granted Critical
Publication of EP2219954B1 publication Critical patent/EP2219954B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
    • B65B11/12—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles

Definitions

  • the invention relates to a method and a device for producing a packaging unit, according to which individual products are combined into a product formation and fixed against each other by means of a shrinkable wrapping or packaging.
  • shrink packaging usually results in the side surfaces so-called shrinkage eyes, in which the shrinking film does not form a closed surface, but usually leaves at least one opening open, which adversely affects the stability of such a shrinkage packaging negatively.
  • a method and associated apparatus for forming shrink wrap are characterized by DE 10 2006 036 590 A1 known.
  • the shrink film is wrapped around a bundle unit, so that each container is enclosed above and below.
  • On two opposite sides of the shrink film is not attached to the container, but stands from this and thus forms openings through which passes in the subsequent shrinkage hot air into the container.
  • the effect of hot air and / or heat on the shrink film reduces the size of the shrink film.
  • the shrinkage in dimension of the shrink film causes it to closely fit the product group and thus fix it. Only on the side surfaces remain as openings the so-called shrinkage eyes, which in the finished manufactured packaging unit, the individual products still not fully protect against unauthorized access, and also adversely affect the stability of the packaging.
  • the application of the products to said paperboard requires an additional processing step.
  • the cardboard underlay must be disposed of, for example, at the consumer or in a store and, of course, is associated with not inconsiderable costs in producing the packaging unit. -
  • the invention aims to provide a total remedy.
  • the invention is based on the technical problem of further developing a method and a device of the embodiment described at the outset such that the costs are reduced while at the same time unchanged functionality.
  • the shrink film is applied before shrinking at least in the region of the side surfaces, or the former shrinkage eye to the product formation to form a closed surface in the form of a closure with overlapping fold areas.
  • the shrink wrap or the blank of the shrink film is thus initially dimensioned such that it forms lateral projections over the product formation which are then applied to the product formation in the region of associated side surfaces. That is, the lateral projections are able to produce on the side surfaces of the product formation a closed surface of the shrink film, so that the former at least partially open side surfaces undergo a closure, so are equipped with a shrinking eye closure.
  • the lateral projections of the shrink film are thus applied to the surface of the product formation at least in the region of the former shrinkage eye and here form the already mentioned closed surface, which represents a closure. It is understood that the shrink film is actively actively applied to the product formation at least in the region of the side surfaces in the majority of applications, that is, the application of the shrink film can also be made in other areas of the product formation, if necessary.
  • the application of the shrink film to the product formation is carried out without contact, ie without the use of additional manipulation units.
  • Such an electrostatic charge is easily possible because it is advantageous in the shrink film to a shrink film made of plastic, such as PE (polyethylene), is.
  • PE polyethylene
  • Such plastic films can be easily charged electrostatically, as example and not limiting in the DE 10 2005 024 380 A1 or even the DE 101 44 287 A1 is described, to which reference is expressly made.
  • the previously electrostatically charged shrink film lays without contact and without the use of additional manipulation units without contact to the side surfaces of the product formation in the area of former shrink eyes and ensures the desired fixation of the shrink film in this area.
  • this one or more manipulation units are usually known guides, guide rods, starting elements or even one or more brushes. With the help of these manipulation units, for example, the one or more brushes, the lateral projections of the shrink film can be applied to the product formation, with possibly overlapping folding areas.
  • the visual appearance of the shrink wrap can be improved in some applications by taking measures that reliably prevent displacement or slippage of the fully positioned shrink film into one another or else relative to the product formation.
  • the shrink film can be equipped with an adhesive coating, which is advantageous in the lateral Supernatant is applied from the outset or applied after wrapping the product formation.
  • the shrink film by means of a method in which adhesive is applied by means of a spray or spray on the shrink film to stick.
  • folding areas can of course also be welded by the shrinking process itself, as it has long been known from the use of shrink films.
  • the overlapping fold areas are formed and the adhesive present in the overlap area or else the weld ensures that the individual folds can no longer be detached from one another.
  • the subsequent shrinking process in, for example, a shrink tunnel through the action of hot air, heat radiation, etc., ensures that any folds or corrugations in the shrink film no longer play a role, because the shrink film contracts during this process and the product formation and consequently the shrinkage Firmly enclosing products in the form of a container.
  • the product formation is enveloped by a total and completely closed film packaging.
  • the stability of the packaging unit produced in this way can be significantly increased over previous embodiments. In fact, even stabilities are achieved which correspond to those packaging units with shrink eye and additional cardboard insert, waiving such additional reinforcing measures.
  • reinforcing cardboard supports, imported cardboard strips etc. are completely dispensable in many applications, in further applications, the cardboard or cardboard strips can be reduced in their dimensions, for example in thickness, so that there is also a cost savings.
  • the packaging unit according to the invention consisting essentially of the product formation and the closed shrink film enclosing it, already without any additional reinforcement has a very high stability for the storage and / or the subsequent transport of the products. Even manipulations of the products in the presentation of goods, for example in the store are almost completely prevented compared to previous embodiments.
  • the main benefits consisting essentially of the product formation and the closed shrink film enclosing it, already without any additional reinforcement.
  • the shrink film is wrapped around the product formation with overlapping edges and then shrunk.
  • the overlapping edges are the longitudinal edges because the shrink wrap is wrapped around the product formation in the longitudinal direction thereof, so that in the transverse direction of the product formation after this process and at their respective side surfaces the already mentioned openings or shrinkage eyes remain and are closed according to the invention.
  • this consists of two narrow side folds and two broad side folds, each resulting from the lateral projections of the shrink film on the side surfaces.
  • the two narrow side folds result from the fact that the lateral projections of the wound around the product formation shrink film are applied to the narrow sides of the product formation on this.
  • the broad side folds arise due to the fact that the lateral projections on the broad sides of the product formation are subjected to the described application process.
  • the application of the associated narrow-side projections and broad-side projections is effected by suitable manipulation units applying the respective projections to the associated side surface of the product formation.
  • elements such as guides, guide rods or start-up elements.
  • brushes preferably with rotating brushes, which are connected for example to pivot arms, are moved with their help and perform the described - folding.
  • the broad side projections and the narrow side projections or the associated broad side folds are fixed to each other with the narrow side folds.
  • associated and overlapping folding areas may be glued together or undergo a mutual fixation at the latest when the shrink film is shrunk. That is, in the described Bonding is indeed an unnecessary option.
  • the narrow side projections are first applied with the aid of the associated manipulation units or brushes to the corresponding side surface.
  • the broadside projections or corresponding Breitumblefaltungen follow. It has proven to be favorable overall when the product formation is first wrapped loosely in the shrink film, wherein the shrink film advantageously at its edges, usually the longitudinal edges, covered. In this way, it is also ensured during subsequent shrinking that the shrink film no longer releases any area of the product formation and the product formation is enveloped over the entire area and closed.
  • the packaging unit is proven to be the Fig. 1 to 3 essentially composed of a shrink film 1 and a product formation 2 enveloped by the shrink film 1.
  • the product formation 2 is in turn built from individual products 3, which are best in the Fig. 3 recognizes.
  • the products 3 in the exemplary embodiment are cans, more precisely beverage cans, that is to say usually rotationally symmetrical and, in particular, cylindrical containers, preferably for receiving drinks.
  • conventional cans for holding foods as products 3 in the manner described below can also be combined to form the packaging unit.
  • the products 3 are first discharged by means of a separating device, not shown, from a product stream and combined into the product formation 2, aligned and compressed so far that they are in abutment with each other.
  • the shrink film 1 is then used overall to fix the products 3 and the product formation 2, so that the packaging unit thus produced better stored and / or can be transported.
  • the shrink film 1 is first loosely wrapped around the product formation 2, as shown in the Fig. 1 is shown. This may be done with the help of a winding machine not expressly shown. In this process, the shrink film 1 is wrapped around the product formation 2, that overlap respective edges 1 a, 1 b, as can be seen in the Fig. 1 recognizes.
  • the edges 1 a, 1 b are, in the exemplary embodiment and not restrictive, the longitudinal edges 1 a, 1 b of the shrink film 1.
  • the shrink film 1 is wrapped in the longitudinal direction L to the product formation 2, which of course is not mandatory.
  • the packaging unit formed in this way has lateral projections 4a, 4b in comparison to an associated side surface 2a of the product formation.
  • the lateral projections 4a, 4b of the shrink film 1 are all dimensioned so that the shrink film 1, the respective Side surface 2a closes when the lateral projections 4a, 4b are applied to the side surface 2a and the product formation 2, respectively.
  • it initially forms a tubular shape around the product formation 2 as shown in FIG Fig. 1 wrapped shrink film 1 in the region of the two side surfaces 2a each have an opening 5. This opening 5 now receives a closure 6, which in the Fig. 2 is shown.
  • the closure 6 is defined by the fact that the shrink film 1 or its lateral projections 4a, 4b are applied to the product formation 2 in the region of the opening 5 to form a closed surface.
  • the device for producing the illustrated packaging unit in addition to the already mentioned separating device and a shrinking device placed at the end of the production path for the final mutual fixing of the products 3 with the aid of the shrink film 1, additionally has a plurality of manipulation units 7 which are arranged in the Fig. 2 are indicated.
  • the respective manipulation unit 7 is equipped, for example, with at least one brush 7a, which is carried by a pivot arm 7b.
  • the brush 7a rotates about a defined by the pivot arm 7b axis, which is not mandatory.
  • the respective lateral projections 4a, 4b of the shrink film 1 are applied to the product formation 2 in the region of the opening 5.
  • overlapping fold areas 8a, 8b are formed, which are also in the Fig. 2 recognizes.
  • a total of four brushes 7a are realized, one brush 7a per side surface of the generally cuboid-shaped product formation 2.
  • the lateral projections 4a, 4b are, on the one hand, narrow-side projections 4a and, on the other hand, broad-side projections 4b.
  • the broadside projections 4b are applied to the side surface 2a with the aid of the associated manipulation units 7 on the corresponding broad sides of the cuboid product formation 2.
  • the folding areas 8b are adjusted accordingly Fig. 2 educated. These folding areas 8b corresponding to Fig. 2 may be fixed to the side surface 2a by being completely and previously electrostatically charged with the shrink film 1 and the manipulation units 7 providing such approach of the associated side projections 4b until they are electrostatically attracted to the side surface 2a.
  • the narrow side projections 4a and the folding areas 8a resulting therefrom are also possible.
  • the application of the narrow side projections 4a takes place first, so that first of all the two associated narrow side folds 8a rest against the side surface 2a to be covered.
  • the two broad-side projections 4b are applied to the side surface 2a and form here the broad side folds 8b.
  • the broad side folds 8b are generally connected to the narrow side folds 8a. This can be done by the already described electrostatic charging of the shrink film 1 in the whole or at least the lateral projections 4a, 4b and / or by gluing the folding areas 8a, 8b.
  • the packaging unit according to the Fig. 2 spent in a shrink tunnel or a comparable shrinking device, in which the shrink film 1 is shrunk onto the product formation 2.
  • the products 3 experience a mutual fixation, because in this process the shrink film 1 is reduced in size.
  • the shrink film 1 completely envelops the product formation 2 even after the shrinking process. Consequently, the incorporation of additional stabilizing elements such as cardboard covers, etc. can be omitted expressly. This reduces the manufacturing costs and the effort.
  • the already described electrostatic charging of the shrink film 1 or at least the lateral projections 4a, 4b can be carried out before, but also after the folding process described. That is, even the narrow side folds 8a and wide side folds 8b can be according to their manufacture according to the Fig. 2 Then charge electrostatically to prevent them from being refolded.
  • the shrink film 1 remains in its position after the operations described (and in particular in the region of the closure 6) and is not displaced by a possibly hot air blower inside the shrinking tunnel. This makes it possible that the shrink film 1 encloses the product formation gapless and in particular the previously open side surfaces get a reliable closure 6.
  • the main benefits are the main benefits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

A packaged unit includes a cluster of products and a shrink film that secures the products to each other. The shrink film is wrapped around the cluster, thereby forming a lateral opening that would otherwise result in a shrink eye. A closure formed by placing a portion of the shrink film against the cluster at in the region of the lateral opening forms a closed surface with overlapping fold regions of the shrink film, thus avoiding the shrink eye.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung einer Verpackungseinheit, wonach einzelne Produkte zu einer Produktformation zusammengefasst und mittels einer schrumpfbaren Umhüllung oder Verpackung gegeneinander fixiert werden. Bei derartigen Schrumpfverpackungen ergeben sich üblicherweise an den Seitenflächen so genannte Schrumpfaugen, bei welchen die schrumpfende Folie keine geschlossene Fläche bildet, sondern in der Regel zumindest eine Öffnung offen lässt, welche die Stabilität einer solchen Schrumpfverpackung in nicht unerheblichem Maße negativ beeinträchtigt.The invention relates to a method and a device for producing a packaging unit, according to which individual products are combined into a product formation and fixed against each other by means of a shrinkable wrapping or packaging. In such shrink packaging usually results in the side surfaces so-called shrinkage eyes, in which the shrinking film does not form a closed surface, but usually leaves at least one opening open, which adversely affects the stability of such a shrinkage packaging negatively.

Ein Verfahren und eine zugehörige Vorrichtung zur Bildung von Schrumpfverpackungen sind durch die DE 10 2006 036 590 A1 bekannt geworden. Hier wird zur Bildung eines Gebindes die Schrumpffolie derart um eine Gebindeeinheit geschlungen, so dass jedes Gebinde oben und unten umschlossen wird. An zwei gegenüberliegenden Seiten liegt die Schrumpffolie nicht an dem Gebinde an, sondern steht von diesem ab und bildet somit Öffnungen, durch welche beim anschließenden Schrumpfen Heißluft in das Gebinde gelangt. Durch die Einwirkung von Heißluft und/oder Wärme auf die Schrumpffolie kommt es zu einer Dimensionsverkleinerung der Schrumpffolie.A method and associated apparatus for forming shrink wrap are characterized by DE 10 2006 036 590 A1 known. Here, to form a container, the shrink film is wrapped around a bundle unit, so that each container is enclosed above and below. On two opposite sides of the shrink film is not attached to the container, but stands from this and thus forms openings through which passes in the subsequent shrinkage hot air into the container. The effect of hot air and / or heat on the shrink film reduces the size of the shrink film.

Dabei führt die Dimensionsverkleinerung der Schrumpffolie dazu, dass sich diese eng an die Produktgruppe anlegt und somit fixiert. Lediglich an den Seitenflächen verbleiben als Öffnungen die so genannten Schrumpfaugen, welche bei der fertig hergestellten Verpackungseinheit die einzelnen Produkte nach wie vor nicht vollständig vor unerlaubten Zugriffen schützen, und darüber hinaus auch die Stabilität der Verpackung negativ beeinflussen.In doing so, the shrinkage in dimension of the shrink film causes it to closely fit the product group and thus fix it. Only on the side surfaces remain as openings the so-called shrinkage eyes, which in the finished manufactured packaging unit, the individual products still not fully protect against unauthorized access, and also adversely affect the stability of the packaging.

Aus diesem Grund gehen viele Verpacker dahin, die herzustellende Verpackungseinheit durch zusätzlich eingebrachte Stabilitätsmittel zu versteifen. Hierbei handelt es sich im einfachsten Fall um Pappböden oder so genannte Pads oder Trays, auf welche die Produkte aufgesetzt werden und die Produktformation bilden. Nach dem Umschlingen der solchermaßen konfektionierten Verpackungseinheit mit der Schrumpffolie wird im Ergebnis die nötige Stabilität beobachtet.For this reason, many packers go to stiffen the packaging to be produced by additionally introduced stability means. In the simplest case these are cardboard bottoms or so-called pads or trays on which the products are placed and form the product formation. After wrapping the so packaged packaging unit with the shrink film, the necessary stability is observed as a result.

Allerdings erfordert das Aufbringen der Produkte auf die genannte Pappunterlage einen zusätzlichen Verarbeitungsschritt. Hinzu kommt, dass die Pappunterlage beispielsweise beim Verbraucher oder in einem Laden entsorgt werden muss und natürlich mit nicht unerheblichen Kosten beim Herstellen der Verpackungseinheit verbunden ist. - Hier will die Erfindung insgesamt Abhilfe schaffen.However, the application of the products to said paperboard requires an additional processing step. In addition, the cardboard underlay must be disposed of, for example, at the consumer or in a store and, of course, is associated with not inconsiderable costs in producing the packaging unit. - Here the invention aims to provide a total remedy.

Der Erfindung liegt das technische Problem zugrunde, ein Verfahren und eine Vorrichtung der eingangs beschriebenen Ausführungsform so weiter zu entwickeln, dass die Kosten bei gleichzeitig unveränderter Funktionalität verringert sind.The invention is based on the technical problem of further developing a method and a device of the embodiment described at the outset such that the costs are reduced while at the same time unchanged functionality.

Zur Lösung dieser Aufgabenstellung ist bei einem gattungsgemäßen Verfahren vorgesehen, dass die Schrumpffolie vor dem Schrumpfen wenigstens im Bereich der Seitenflächen, bzw. des vormaligen Schrumpfauges an die Produktformation unter Bildung einer geschlossenen Oberfläche in Gestalt eines Verschlusses mit sich überlappenden Faltbereichen angelegt wird.To solve this problem, it is provided in a generic method that the shrink film is applied before shrinking at least in the region of the side surfaces, or the former shrinkage eye to the product formation to form a closed surface in the form of a closure with overlapping fold areas.

Erfindungsgemäß wird also zunächst einmal die Schrumpfverpackung bzw. der Zuschnitt der Schrumpffolie so bemessen, dass diese jeweils seitliche Überstände über die Produktformation bildet, die dann im Bereich zugehöriger Seitenflächen an die Produktformation angelegt werden. Das heißt, die seitlichen Überstände sind in der Lage, an den Seitenflächen der Produktformation eine geschlossene Oberfläche der Schrumpffolie erzeugen zu können, so dass die vormals zumindest teilweise offenen Seitenflächen einen Verschluss erfahren, also mit einem Schrumpfaugenverschluss ausgerüstet sind.According to the invention, the shrink wrap or the blank of the shrink film is thus initially dimensioned such that it forms lateral projections over the product formation which are then applied to the product formation in the region of associated side surfaces. That is, the lateral projections are able to produce on the side surfaces of the product formation a closed surface of the shrink film, so that the former at least partially open side surfaces undergo a closure, so are equipped with a shrinking eye closure.

Die seitlichen Überstände der Schrumpffolie werden also an die Oberfläche der Produktformation zumindest im Bereich des vormaligen Schrumpfauges angelegt und bilden hier die bereits angesprochene geschlossene Oberfläche, welche einen Verschluss darstellt. Dabei versteht es sich, dass die Schrumpffolie zumindest im Bereich der Seitenflächen bei der Mehrzahl der Anwendungsfälle aktiv an die Produktformation aktiv angelegt wird, das heißt, dass das Anlegen der Schrumpffolie auch in anderen Bereichen der Produktformation erfolgen kann, falls dies erforderlich ist.The lateral projections of the shrink film are thus applied to the surface of the product formation at least in the region of the former shrinkage eye and here form the already mentioned closed surface, which represents a closure. It is understood that the shrink film is actively actively applied to the product formation at least in the region of the side surfaces in the majority of applications, that is, the application of the shrink film can also be made in other areas of the product formation, if necessary.

Beispielsweise ist es im Rahmen der Erfindung denkbar, dass das Anlegen der Schrumpffolie an die Produktformation berührungslos, also ohne den Einsatz von zusätzlichen Manipulationseinheiten durchgeführt wird. In diesem Fall hat es sich bewährt, wenn die Schrumpffolie elektrostatisch aufgeladen wird. Eine solche elektrostatische Aufladung ist unschwer möglich, weil es sich bei der Schrumpffolie vorteilhaft um eine Schrumpffolie aus Kunststoff, beispielsweise PE (Polyethylen), handelt. Derartige Kunststofffolien lassen sich problemlos elektrostatisch aufladen, wie dies beispielhaft und nicht einschränkend in der DE 10 2005 024 380 A1 oder auch der DE 101 44 287 A1 beschrieben wird, auf die ausdrücklich Bezug genommen wird.For example, it is conceivable within the scope of the invention that the application of the shrink film to the product formation is carried out without contact, ie without the use of additional manipulation units. In this case, it has proven useful when the shrink film is electrostatically charged. Such an electrostatic charge is easily possible because it is advantageous in the shrink film to a shrink film made of plastic, such as PE (polyethylene), is. Such plastic films can be easily charged electrostatically, as example and not limiting in the DE 10 2005 024 380 A1 or even the DE 101 44 287 A1 is described, to which reference is expressly made.

Jedenfalls legt sich die zuvor elektrostatisch aufgeladene Schrumpffolie problemlos und ohne den Einsatz von zusätzlichen Manipulationseinheiten berührungslos an die Seitenflächen der Produktformation im Bereich der vormaligen Schrumpfaugen an und sorgt für die gewünschte Fixierung der Schrumpffolie in diesem Bereich.In any case, the previously electrostatically charged shrink film lays without contact and without the use of additional manipulation units without contact to the side surfaces of the product formation in the area of former shrink eyes and ensures the desired fixation of the shrink film in this area.

Alternativ zur beschriebenen berührungslosen Fixierung der seitlichen Überstände an den Seitenflächen im Bereich der jeweiligen Öffnung ist es alternativ oder zusätzlich auch möglich, das Anlegen mittels einer oder mehrerer Manipulationseinheiten - durch Berührung - durchzuführen. Bei dieser einen oder den mehreren Manipulationseinheiten handelt es sich üblicherweise um bekannte Führungen, Leitstäbe, Anlaufelemente oder aber auch eine oder mehrere Bürsten. Mit Hilfe dieser Manipulationseinheiten, beispielsweise der einen oder der mehreren Bürsten lassen sich die seitlichen Überstände der Schrumpffolie an die Produktformation anlegen, und zwar mit sich gegebenenfalls überlappenden Faltbereichen.As an alternative to the described contactless fixation of the lateral protrusions on the side surfaces in the region of the respective opening, it is alternatively or additionally also possible to carry out the application by means of one or more manipulation units-by touch. This one or more manipulation units are usually known guides, guide rods, starting elements or even one or more brushes. With the help of these manipulation units, for example, the one or more brushes, the lateral projections of the shrink film can be applied to the product formation, with possibly overlapping folding areas.

Das optische Erscheinungsbild der Schrumpfverpackung kann in einigen Anwendungsfällen dadurch verbessert werden, wenn Maßnehmen ergriffen werden, welche ein Verschieben oder Verrutschen der fertig positionierten Schrumpffolie ineinander oder aber auch relativ zur Produktformation sicher verhindern.The visual appearance of the shrink wrap can be improved in some applications by taking measures that reliably prevent displacement or slippage of the fully positioned shrink film into one another or else relative to the product formation.

Zunächst besteht die Möglichkeit, die elektrostatische Aufladung so zu wählen, dass die erzielbaren Haftkräfte zwischen der sich überlappenden Schrumpffolie oder aber auch zwischen der Schrumpffolie und der zugehörigen Produktformation oder der jeweiligen Umgebung ein unerwünschtes Verschieben der Schrumpffolie sicher verhindern.First, there is the possibility to choose the electrostatic charge so that the achievable adhesive forces between the overlapping shrink film or between the shrink film and the associated product formation or the surrounding environment safely prevent unwanted displacement of the shrink film.

Eine weitere Möglichkeit zur Fixierung der Schrumpffolie besteht darin, die sich überlappenden Bereiche und/oder die sich überlappenden Faltbereiche der Schrumpffolie miteinander zu verkleben. Dazu kann die Schrumpffolie mit einer Klebebeschichtung ausgerüstet werden, die vorteilhaft im Bereich der seitlichen Überstände von vornherein aufgebracht ist oder nach dem Umwickeln der Produktformation aufgebracht wird.Another possibility for fixing the shrink film is to glue together the overlapping areas and / or the overlapping fold areas of the shrink film. For this purpose, the shrink film can be equipped with an adhesive coating, which is advantageous in the lateral Supernatant is applied from the outset or applied after wrapping the product formation.

Weiterhin besteht ebenfalls die Möglichkeit, die Schrumpffolie mittels eines Verfahrens bei welchem Klebstoff mittels eines Spritz- oder Sprühvorganges auf die Schrumpffolie aufgebracht wird zu verkleben.Furthermore, it is also possible, the shrink film by means of a method in which adhesive is applied by means of a spray or spray on the shrink film to stick.

Grundsätzlich lassen sich die Faltbereiche natürlich auch durch den Schrumpfprozess selbst verschweißen, wie es aus der Anwendung von Schrumpffolien seit langer Zeit bekannt ist.Of course, the folding areas can of course also be welded by the shrinking process itself, as it has long been known from the use of shrink films.

Um die geschlossene Oberfläche möglichst einwandfrei darstellen zu können, hat es sich bei bestimmten Anwendungsfällen bewährt, wenn die Schrumpffolie zumindest im Bereich der Seitenflächen der Produktformation an der Produktformation fixiert wird. Das heißt, die seitlichen Überstände im Bereich der Seitenflächen werden nicht nur an die Produktformation aktiv angelegt, sondern zusätzlich auch an der Produktformation festgelegt. Zu diesem Zweck kann auf verschiedene Arten der Fixierung zurückgegriffen werden.In order to be able to represent the closed surface as flawlessly as possible, it has proven in certain applications when the shrink film is fixed to the product formation at least in the region of the side surfaces of the product formation. This means that the lateral projections in the area of the side surfaces are not only actively applied to the product formation, but are also determined on the product formation. For this purpose, various types of fixation can be used.

Sobald die seitlichen Überstände auf die zu verschließende Seitenfläche zu bewegt werden, bilden sich die überlappenden Faltbereiche aus und stellt der im Überlappbereich vorhandene oder eingebrachte Kleber oder auch die Schweißung sicher, dass die einzelnen Faltungen nicht mehr voneinander gelöst werden können.As soon as the lateral protrusions are moved towards the side surface to be closed, the overlapping fold areas are formed and the adhesive present in the overlap area or else the weld ensures that the individual folds can no longer be detached from one another.

In jedem Fall sorgt der anschließende Schrumpfvorgang in beispielsweise einem Schrumpftunnel durch Einwirkung von Heißluft, Wärmestrahlung etc. dafür, dass ein etwaiger Faltenwurf oder auch Wellungen in der Schrumpffolie keine Rolle mehr spielen, weil sich die Schrumpffolie bei diesem Vorgang zusammenzieht und die Produktformation und folglich die Produkte in Gestalt eines Gebindes fest umschließt. Weil bei diesem erfindungsgemäßen Vorgang die an den Seitenflächen der Produktformation früher üblichen Löcher oder Öffnungen nicht entstehen, wird die Produktformation durch eine insgesamt und vollständig geschlossene Folienverpackung umhüllt. Dadurch lässt sich die Stabilität der solchermaßen produzierten Verpackungseinheit gegenüber bisherigen Ausführungsformen deutlich steigern. Tatsächlich werden sogar Stabilitäten erreicht, die denjenigen Verpackungseinheiten mit Schrumpfauge und zusätzlicher Pappeinlage entsprechen, und zwar unter Verzicht auf solche zusätzlichen Verstärkungsmaßnahmen.In any case, the subsequent shrinking process in, for example, a shrink tunnel through the action of hot air, heat radiation, etc., ensures that any folds or corrugations in the shrink film no longer play a role, because the shrink film contracts during this process and the product formation and consequently the shrinkage Firmly enclosing products in the form of a container. Because in this inventive process If the holes or openings formerly used on the side surfaces of the product formation do not arise, the product formation is enveloped by a total and completely closed film packaging. As a result, the stability of the packaging unit produced in this way can be significantly increased over previous embodiments. In fact, even stabilities are achieved which correspond to those packaging units with shrink eye and additional cardboard insert, waiving such additional reinforcing measures.

Das heißt, im Rahmen der Erfindung sind verstärkende Pappauflagen, eingebrachte Pappstreifen etc. in vielen Anwendungsfällen vollständig entbehrlich, in weitern Anwendungsfällen können die Pappauflagen oder Pappstreifen in ihren Abmessungen, beispielsweise in ihrer Dicke reduziert werden, so dass sich auch hier eine Kosteneinsparung ergibt.That is, in the context of the invention, reinforcing cardboard supports, imported cardboard strips etc. are completely dispensable in many applications, in further applications, the cardboard or cardboard strips can be reduced in their dimensions, for example in thickness, so that there is also a cost savings.

Schließlich verfügt die erfindungsgemäße Verpackungseinheit, bestehend im Wesentlichen aus der Produktformation und der sie umhüllenden geschlossenen Schrumpffolie bereits ohne zusätzliche Verstärkung über eine sehr große Stabilität für die Lagerung und/oder den anschließenden Transport der Produkte. Auch Manipulationen an den Produkten bei der Warenpräsentation beispielsweise im Laden sind gegenüber bisherigen Ausführungsformen nahe zu vollständig verhindert. Hierin sind die wesentlichen Vorteile zu sehen.Finally, the packaging unit according to the invention, consisting essentially of the product formation and the closed shrink film enclosing it, already without any additional reinforcement has a very high stability for the storage and / or the subsequent transport of the products. Even manipulations of the products in the presentation of goods, for example in the store are almost completely prevented compared to previous embodiments. Here are the main benefits.

Nach vorteilhafter Ausgestaltung wird die Schrumpffolie um die Produktformation mit überlappenden Rändern herumgewickelt und anschließend aufgeschrumpft. Meistens handelt es sich bei den überlappenden Rändern um die Längsränder, weil die Schrumpffolie um die Produktformation in deren Längsrichtung herumgewickelt wird, so dass in Querrichtung der Produktformation nach diesem Vorgang und an jeweiligen zugehörigen Seitenflächen die bereits angesprochenen Öffnungen oder Schrumpfaugen verbleiben und erfindungsgemäß verschlossen werden.According to an advantageous embodiment, the shrink film is wrapped around the product formation with overlapping edges and then shrunk. In most cases, the overlapping edges are the longitudinal edges because the shrink wrap is wrapped around the product formation in the longitudinal direction thereof, so that in the transverse direction of the product formation after this process and at their respective side surfaces the already mentioned openings or shrinkage eyes remain and are closed according to the invention.

Um den Verschluss der seitlichen Öffnungen oder Schrumpfaugen im Detail zu realisieren, hat es sich bewährt, wenn sich dieser aus zwei Schmalseitenfaltungen und zwei Breitseitenfaltungen zusammensetzt, die jeweils aus den seitlichen Überständen der Schrumpffolie über die Seitenflächen resultieren. Die beiden Schmalseitenfaltungen ergeben sich dadurch, dass die seitlichen Überstände der um die Produktformation gewickelten Schrumpffolie an den Schmalseiten der Produktformation an diese angelegt werden. Die Breitseitenfaltungen ergeben sich aufgrund der Tatsache, dass die seitlichen Überstände an den Breitseiten der Produktformation dem beschriebenen Anlegevorgang unterzogen werden. Meistens erfolgt das Anlegen der zugehörigen Schmalseitenüberstände und Breitseitenüberstände dadurch, dass geeignete Manipulationseinheiten die jeweiligen Überstände an die zugehörige Seitenfläche der Produktformation anlegen. Hier hat sich bewährt, mit Elementen wie beispielsweise Führungen, Leitstäben oder auch Anlaufelementen zu arbeiten.In order to realize the closure of the lateral openings or shrinkage eyes in detail, it has proven useful if this consists of two narrow side folds and two broad side folds, each resulting from the lateral projections of the shrink film on the side surfaces. The two narrow side folds result from the fact that the lateral projections of the wound around the product formation shrink film are applied to the narrow sides of the product formation on this. The broad side folds arise due to the fact that the lateral projections on the broad sides of the product formation are subjected to the described application process. In most cases, the application of the associated narrow-side projections and broad-side projections is effected by suitable manipulation units applying the respective projections to the associated side surface of the product formation. Here it has proven to work with elements such as guides, guide rods or start-up elements.

Ebenfalls hat es sich bewährt, jeweils mit Bürsten, vorzugsweise mit rotierenden Bürsten zu arbeiten, die beispielsweise an Schwenkarme angeschlossen sind, mit ihrer Hilfe bewegt werden und die beschriebene - Faltung vollführen.Also, it has been proven to work with brushes, preferably with rotating brushes, which are connected for example to pivot arms, are moved with their help and perform the described - folding.

In der Regel sind die Breitseitenüberstände und die Schmalseitenüberstände bzw. die zugehörigen Breitseitenfaltungen mit den Schmalseitenfaltungen untereinander fixiert. Dazu mögen zugehörige und sich überlappende Faltbereiche miteinander verklebt sein bzw. erfahren eine gegenseitige Fixierung spätestens dann, wenn die Schrumpffolie aufgeschrumpft wird. Das heißt, bei der beschriebenen Verklebung handelt es sich tatsächlich um eine nicht notwendige Option.In general, the broad side projections and the narrow side projections or the associated broad side folds are fixed to each other with the narrow side folds. For this purpose, associated and overlapping folding areas may be glued together or undergo a mutual fixation at the latest when the shrink film is shrunk. That is, in the described Bonding is indeed an unnecessary option.

Um dies im Detail zu erreichen, werden zunächst die Schmalseitenfaltungen und abschließend die Breitseitenfaltungen hergestellt. Zu diesem Zweck werden also zunächst die Schmalseitenüberstände mit Hilfe der zugehörigen Manipulationseinheiten bzw. Bürsten an die korrespondierende Seitenfläche angelegt. Zum Abschluss folgen die Breitseitenüberstände bzw. zugehörige Breitseitenfaltungen . Dabei hat es sich insgesamt als günstig erwiesen, wenn die Produktformation zunächst locker in die Schrumpffolie eingeschlagen wird, wobei sich die Schrumpffolie vorteilhaft an ihren Rändern, meistens den Längsrändern, überdeckt. Auf diese Weise wird auch beim anschließenden Aufschrumpfen sichergestellt, dass die Schrumpffolie keinen Bereich der Produktformation mehr freigibt und die Produktformation vollflächig und geschlossen umhüllt wird.To achieve this in detail, first the narrow side folds and finally the wide side folds are made. For this purpose, therefore, the narrow side projections are first applied with the aid of the associated manipulation units or brushes to the corresponding side surface. Finally, the broadside projections or corresponding Breitseitenfaltungen follow. It has proven to be favorable overall when the product formation is first wrapped loosely in the shrink film, wherein the shrink film advantageously at its edges, usually the longitudinal edges, covered. In this way, it is also ensured during subsequent shrinking that the shrink film no longer releases any area of the product formation and the product formation is enveloped over the entire area and closed.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert; es zeigen:

Fig. 1
eine erfindungsgemäße Vorrichtung zur Herstellung einer Verpackungseinheit in einer Übersicht,
Fig. 2
den Gegenstand nach Fig. 1 in Frontansicht aus Richtung X und
Fig. 3
die insgesamt hergestellte Verpackungseinheit.
In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:
Fig. 1
an inventive device for producing a packaging unit in an overview,
Fig. 2
the object after Fig. 1 in front view from direction X and
Fig. 3
the total produced packaging unit.

In den Figuren ist eine Vorrichtung zur Herstellung einer Verpackungseinheit dargestellt. Die Verpackungseinheit setzt sich ausweislich der Fig. 1 bis 3 im Wesentlichen aus einer Schrumpffolie 1 und einer durch die Schrumpffolie 1 umhüllten Produktformation 2 zusammen. Die Produktformation 2 ist ihrerseits aus einzelnen Produkten 3 aufgebaut, die man am besten in der Fig. 3 erkennt. Bei den Produkten 3 handelt es sich im Ausführungsbeispiel um Dosen, genauer Getränkedosen, also meistens um rotationssymmetrische und insbesondere zylindrische Behälter, vorzugsweise zur Aufnahme von Getränken. Grundsätzlich können auch übliche Dosen zur Aufnahme von Lebensmitteln als Produkte 3 in der nachfolgend beschriebenen Art und Weise zu der Verpackungseinheit zusammengefasst werden.In the figures, an apparatus for producing a packaging unit is shown. The packaging unit is proven to be the Fig. 1 to 3 essentially composed of a shrink film 1 and a product formation 2 enveloped by the shrink film 1. The product formation 2 is in turn built from individual products 3, which are best in the Fig. 3 recognizes. The products 3 in the exemplary embodiment are cans, more precisely beverage cans, that is to say usually rotationally symmetrical and, in particular, cylindrical containers, preferably for receiving drinks. In principle, conventional cans for holding foods as products 3 in the manner described below can also be combined to form the packaging unit.

Dazu werden die Produkte 3 zunächst mit Hilfe einer nicht dargestellten Trenneinrichtung aus einem Produktstrom ausgeschleust und zu der Produktformation 2 zusammengefasst, ausgerichtet und soweit verdichtet, dass sie auf Stoß zueinander stehen. Die Schrumpffolie 1 dient dann insgesamt dazu, die Produkte 3 bzw. die Produktformation 2 zu fixieren, damit die solchermaßen hergestellte Verpackungseinheit besser gelagert und/oder transportiert werden kann.For this purpose, the products 3 are first discharged by means of a separating device, not shown, from a product stream and combined into the product formation 2, aligned and compressed so far that they are in abutment with each other. The shrink film 1 is then used overall to fix the products 3 and the product formation 2, so that the packaging unit thus produced better stored and / or can be transported.

Zu diesem Zweck wird die Schrumpffolie 1 zunächst locker um die Produktformation 2 geschlungen, wie dies in der Fig. 1 dargestellt ist. Das mag mit Hilfe einer nicht ausdrücklich dargestellten Wickelmaschine erfolgen. Bei diesem Vorgang wird die Schrumpffolie 1 so um die Produktformation 2 geschlungen, dass sich jeweilige Ränder 1 a, 1 b überdecken, wie man in der Fig. 1 erkennt. Bei den Rändern 1 a, 1b handelt es sich im Ausführungsbeispiel und nicht einschränkend um die Längsränder 1 a, 1b der Schrumpffolie 1.For this purpose, the shrink film 1 is first loosely wrapped around the product formation 2, as shown in the Fig. 1 is shown. This may be done with the help of a winding machine not expressly shown. In this process, the shrink film 1 is wrapped around the product formation 2, that overlap respective edges 1 a, 1 b, as can be seen in the Fig. 1 recognizes. The edges 1 a, 1 b are, in the exemplary embodiment and not restrictive, the longitudinal edges 1 a, 1 b of the shrink film 1.

Tatsächlich wird die Schrumpffolie 1 in Längsrichtung L um die Produktformation 2 geschlungen, was selbstverständlich nicht zwingend ist. Man erkennt, dass die solchermaßen gebildete Verpackungseinheit seitliche Überstände 4a, 4b im Vergleich zu einer zugehörigen Seitenfläche 2a der Produktformation aufweist. Dabei sind die seitlichen Überstände 4a, 4b der Schrumpffolie 1 insgesamt so bemessen, dass die Schrumpffolie 1 die jeweilige Seitenfläche 2a verschließt, wenn die seitlichen Überstände 4a, 4b an die Seitenfläche 2a bzw. die Produktformation 2 angelegt werden. Tatsächlich bildet die zunächst schlauchförmig um die Produktformation 2 entsprechend der Darstellung in Fig. 1 herumgelegte Schrumpffolie 1 im Bereich der beiden Seitenflächen 2a jeweils eine Öffnung 5 aus. Diese Öffnung 5 erhält nun einen Verschluss 6, der in der Fig. 2 dargestellt ist.In fact, the shrink film 1 is wrapped in the longitudinal direction L to the product formation 2, which of course is not mandatory. It can be seen that the packaging unit formed in this way has lateral projections 4a, 4b in comparison to an associated side surface 2a of the product formation. In this case, the lateral projections 4a, 4b of the shrink film 1 are all dimensioned so that the shrink film 1, the respective Side surface 2a closes when the lateral projections 4a, 4b are applied to the side surface 2a and the product formation 2, respectively. In fact, it initially forms a tubular shape around the product formation 2 as shown in FIG Fig. 1 wrapped shrink film 1 in the region of the two side surfaces 2a each have an opening 5. This opening 5 now receives a closure 6, which in the Fig. 2 is shown.

Der Verschluss 6 wird dadurch definiert, dass die Schrumpffolie 1 bzw. deren seitliche Überstände 4a, 4b im Bereich der Öffnung 5 an die Produktformation 2 unter Bildung einer geschlossenen Oberfläche angelegt werden. Zu diesem Zweck verfügt die Vorrichtung zur Herstellung der dargestellten Verpackungseinheit neben der bereits angesprochenen Trenneinrichtung und einer endseitig des Herstellungsweges platzierten Schrumpfeinrichtung zur abschließenden gegenseitigen Fixierung der Produkte 3 mit Hilfe der Schrumpffolie 1 zusätzlich noch über mehrere Manipulationseinheiten 7, die in der Fig. 2 angedeutet sind.The closure 6 is defined by the fact that the shrink film 1 or its lateral projections 4a, 4b are applied to the product formation 2 in the region of the opening 5 to form a closed surface. For this purpose, the device for producing the illustrated packaging unit, in addition to the already mentioned separating device and a shrinking device placed at the end of the production path for the final mutual fixing of the products 3 with the aid of the shrink film 1, additionally has a plurality of manipulation units 7 which are arranged in the Fig. 2 are indicated.

Die jeweilige Manipulationseinheit 7 ist beispielsweise mit wenigstens einer Bürste 7a ausgerüstet, die von einem Schwenkarm 7b getragen wird. Die Bürste 7a rotiert um eine durch den Schwenkarm 7b definierte Achse, was allerdings nicht zwingend ist. Mit Hilfe der Bürste 7a bzw. der Manipulationseinheit 7 im Ganzen werden die jeweils seitlichen Überstände 4a, 4b der Schrumpffolie 1 im Bereich der Öffnung 5 an die Produktformation 2 angelegt. Dabei bilden sich überlappende Faltbereiche 8a, 8b aus, die man ebenfalls in der Fig. 2 erkennt. Es sind insgesamt vier Bürsten 7a realisiert, und zwar jeweils eine Bürste 7a je Seitenfläche der zumeist quaderförmig gestalteten Produktformation 2.The respective manipulation unit 7 is equipped, for example, with at least one brush 7a, which is carried by a pivot arm 7b. The brush 7a rotates about a defined by the pivot arm 7b axis, which is not mandatory. With the aid of the brush 7a or the manipulation unit 7 as a whole, the respective lateral projections 4a, 4b of the shrink film 1 are applied to the product formation 2 in the region of the opening 5. In this case, overlapping fold areas 8a, 8b are formed, which are also in the Fig. 2 recognizes. A total of four brushes 7a are realized, one brush 7a per side surface of the generally cuboid-shaped product formation 2.

Bei den seitlichen Überständen 4a, 4b handelt es sich einerseits um Schmalseitenüberstände 4a und andererseits Breitseitenüberstände 4b. Die Breitseitenüberstände 4b werden mit Hilfe der zugehörigen Manipulationseinheiten 7 an den korrespondierenden Breitseiten der quaderförmigen Produktformation 2 an die Seitenfläche 2a angelegt. Dadurch werden im Ausführungsbeispiel die Faltbereiche 8b gemäß Fig. 2 gebildet. Diese Faltbereiche 8b entsprechend der Fig. 2 mögen an der Seitenfläche 2a dadurch fixiert sein oder werden, dass die Schrumpffolie 1 insgesamt und zuvor elektrostatisch aufgeladen worden ist und die Manipulationseinheiten 7 für eine derartige Annäherung der zugehörigen seitlichen Überstände 4b sorgen, bis diese von der Seitenfläche 2a elektrostatisch angezogen werden. Alternativ oder zusätzlich ist es auch möglich, dass die Faltbereiche 8b untereinander (oder mit der Produktformation 2) eine Verklebung erfahren. Vergleichbares gilt natürlich ebenso für die Schmalseitenüberstände 4a und die daraus resultierenden Faltbereiche 8a.The lateral projections 4a, 4b are, on the one hand, narrow-side projections 4a and, on the other hand, broad-side projections 4b. The broadside projections 4b are applied to the side surface 2a with the aid of the associated manipulation units 7 on the corresponding broad sides of the cuboid product formation 2. As a result, in the exemplary embodiment, the folding areas 8b are adjusted accordingly Fig. 2 educated. These folding areas 8b corresponding to Fig. 2 may be fixed to the side surface 2a by being completely and previously electrostatically charged with the shrink film 1 and the manipulation units 7 providing such approach of the associated side projections 4b until they are electrostatically attracted to the side surface 2a. Alternatively or additionally, it is also possible for the folding areas 8b to undergo bonding with one another (or with the product formation 2). Of course, the same applies to the narrow side projections 4a and the folding areas 8a resulting therefrom.

In jedem Fall findet das Anlegen der Schmalseitenüberstände 4a als erstes statt, so dass sich zunächst die beiden zugehörigen Schmalseitenfaltungen 8a an die zu bedeckende Seitenfläche 2a anlegen. Anschließend werden die beiden Breitseitenüberstände 4b an die Seitenfläche 2a angelegt und bilden hier die Breitseitenfaltungen 8b. Bei diesem Vorgang werden im Allgemeinen die Breitseitenfaltungen 8b mit den Schmalseitenfaltungen 8a verbunden. Das kann durch die bereits beschriebene elektrostatische Aufladung der Schrumpffolie 1 im Ganzen bzw. zumindest der seitlichen Überstände 4a, 4b und/ oder durch eine Klebung der Faltbereiche 8a, 8b erfolgen.In any case, the application of the narrow side projections 4a takes place first, so that first of all the two associated narrow side folds 8a rest against the side surface 2a to be covered. Subsequently, the two broad-side projections 4b are applied to the side surface 2a and form here the broad side folds 8b. In this process, the broad side folds 8b are generally connected to the narrow side folds 8a. This can be done by the already described electrostatic charging of the shrink film 1 in the whole or at least the lateral projections 4a, 4b and / or by gluing the folding areas 8a, 8b.

Nach diesen beschriebenen Vorgängen wird die Verpackungseinheit entsprechend der Fig. 2 in einen Schrumpftunnel oder eine vergleichbare Schrumpfeinrichtung verbracht, in welcher die Schrumpffolie 1 auf die Produktformation 2 aufgeschrumpft wird. Gleichzeitig erfahren die Produkte 3 eine gegenseitige Fixierung, weil bei diesem Vorgang die Schrumpffolie 1 in ihrer Größe verkleinert wird. Dadurch, dass auch die vormals durch die Schrumpfaugen offenen Seitenflächen durch das erfindungsgemäße Vorgehen durch eine geschlossene Oberfläche abgedeckt werden und durch das Zusammenwirken der Schmalseitenfaltungen 8a und Breitseitenfaltungen 8b verschlossen sind, umhüllt die Schrumpffolie 1 auch nach dem Aufschrumpfvorgang die Produktformation 2 vollständig. Folglich kann auf das Einbringen zusätzlicher Stabilisierungselemente wie beispielsweise Pappdeckel etc. ausdrücklich verzichtet werden. Das reduziert die Herstellungskosten und den Aufwand.After these operations described, the packaging unit according to the Fig. 2 spent in a shrink tunnel or a comparable shrinking device, in which the shrink film 1 is shrunk onto the product formation 2. At the same time, the products 3 experience a mutual fixation, because in this process the shrink film 1 is reduced in size. As a result of the fact that the side surfaces which were previously open by the shrinkage eyes are also removed by the procedure according to the invention are covered by a closed surface and are closed by the interaction of the narrow side folds 8a and broad side folds 8b, the shrink film 1 completely envelops the product formation 2 even after the shrinking process. Consequently, the incorporation of additional stabilizing elements such as cardboard covers, etc. can be omitted expressly. This reduces the manufacturing costs and the effort.

Wie bereits dargestellt, kann bei vielen weiteren Anwendungsfällen, bei denen auf zusätzliche Stabilisierungselemente nicht vollständig verzichtet werden kann, eine Reduzierung der Abmessungen der Stabilisierungselemente, beispielsweise eine Reduzierung deren Materialdicke vorgenommen werden, wodurch sich auch in solchen Anwendungsfällen eine Kosteneinsparung ergibt.As already stated, in many other applications in which additional stabilizing elements can not be completely dispensed with, a reduction in the dimensions of the stabilizing elements, for example a reduction in their material thickness, can be carried out, resulting in cost savings in such applications.

Die bereits beschriebene elektrostatische Aufladung der Schrumpffolie 1 respektive wenigstens der seitlichen Überstände 4a, 4b kann vor, während aber auch nach dem beschriebenen Faltvorgang durchgeführt werden. Das heißt, selbst die Schmalseitenfaltungen 8a und Breitseitenfaltungen 8b lassen sich nach ihrer Herstellung gemäß der Fig. 2 anschließend noch elektrostatisch aufladen, um zu verhindern, dass sie wieder aufgefaltet werden. In jedem Fall verbleibt die Schrumpffolie 1 nach den beschriebenen Vorgängen in ihrer Position (auch und insbesondere im Bereich des Verschlusses 6) und wird auch durch ein eventuelles Heißluftgebläse im Innern des Schrumpftunnels nicht verschoben. Dadurch ist es möglich, dass die Schrumpffolie 1 die Produktformation lückenlos umschließt und insbesondere auch die vormals offenen Seitenflächen einen zuverlässigen Verschluss 6 erhalten. Hierin sind die wesentlichen Vorteile zu sehen.The already described electrostatic charging of the shrink film 1 or at least the lateral projections 4a, 4b can be carried out before, but also after the folding process described. That is, even the narrow side folds 8a and wide side folds 8b can be according to their manufacture according to the Fig. 2 Then charge electrostatically to prevent them from being refolded. In any case, the shrink film 1 remains in its position after the operations described (and in particular in the region of the closure 6) and is not displaced by a possibly hot air blower inside the shrinking tunnel. This makes it possible that the shrink film 1 encloses the product formation gapless and in particular the previously open side surfaces get a reliable closure 6. Here are the main benefits.

Claims (15)

  1. A method for the production of a packaged unit whereby individual products (3) are combined into a product cluster (2) and are fixed relative to each other by means of a shrink film (1) and for this purpose the shrink film (1) is wrapped around the product cluster (2) such that at least one lateral opening is formed and is then shrunk, characterised in that before being shrunk the shrink film (1) is pressed against the product cluster (2) at least in the region of the lateral opening such that a closed surface is formed in the shape of a closure (6) having overlapping folded zones (8a, 8b).
  2. A method according to claim 1 characterised in that the shrink film (1) is fixed to the product cluster (2) at least in the region of the closure (6).
  3. A method according to claim 2 characterised in that the fixing is carried out contactlessly, e.g. electrostatically and/or by bonding of the overlapping folded zones (8a, 8b), and/or by means of a manipulation unit (7).
  4. A method according to any one of claims 1 to 3 characterised in that the shrink film (1) is wrapped around the product cluster (2) with overlapping edges (1 a, 1 b) and then shrunk.
  5. A device for the production of a packaged unit, in particular for applying the method according to any one of claims 1 to 4, having a separating unit which separates out individual products (3) from a product flow and combines them into a product cluster (2), and having a shrinking unit for the reciprocal fixing of the products (3) by the application of a shrink film (1), wherein the shrink film (1) is wrapped around the product cluster (2) such that at least one lateral opening is formed, and the shrink film is then shrunk, characterised in that a manipulation unit (7) is also provided which presses the shrink film (1) before shrinking against the product cluster (2) at least in the region of the lateral opening (5) so as to form a closed surface in the shape of a closure (6) with overlapping folded zones (8a, 8b).
  6. A device according to claim 5 characterised in that the manipulation unit (7) contains a bonding device and/or an electrostatic charging unit for contactless pressing.
  7. A device according to claim 6 or 7 characterised in that the manipulation unit (7) is equipped with at least one brush (7a) in order to press - in the region of the lateral opening (5) - laterally projecting ends (4a, 4b) of the shrink film (1) against the product cluster (2) with optionally overlapping folded zones (8a, 8b).
  8. A device according to claim 7 characterised in that a total of four brushes (7a, 7b) are provided, with one brush (7a, 7b) each per lateral face of the usually cuboid product cluster (2).
  9. A device according to either of claims 7 or 8 characterised in that the respective brush (7a) is configured to be rotating and is moved by means of a swivel arm (7b).
  10. A packaged unit comprising individual products (3) which are combined into a product cluster (2) and fixed relative to each other by means of a shrink film (1), the shrink film (1) being wrapped around the product cluster (2) so as to form at least one lateral opening (5) and then being shrunk, characterised by a closure (6) which is produced by the shrink film (1) before it is shrunk being pressed against the product cluster (2) at least in the region of the lateral openings (5) such that a closed surface is formed with overlapping folded zones (8a, 8b).
  11. A packaged unit according to claim 10 characterised in that the closure (6) exhibits as folded zones (8a, 8b) two narrow-side folds (8a) which are covered by two wide-side folds (8b).
  12. A packaged unit according to claim 11 characterised in that the wide-side folds (8b) are fixed to one another with the narrow-side folds (8a).
  13. A packaged unit according to claim 11 or 12 characterised in that the overlapping folded zones (8a, 8b) are bonded to one another.
  14. A packaged unit according to any one of claims 11 to 13 characterised in that the narrow-side folds (8a) were produced first and then the wide-side folds (8b).
  15. A packaged unit according to any one of claims 10 to 14 characterised in that the shrink film (1) wrapped around the product cluster (2) covers itself at its edges (1a, 1b).
EP09740057A 2008-10-22 2009-10-08 Method and device for the production of a packaged unit Revoked EP2219954B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09740057T PL2219954T3 (en) 2008-10-22 2009-10-08 Method and device for the production of a packaged unit
SI200930187T SI2219954T1 (en) 2008-10-22 2009-10-08 Method and device for the production of a packaged unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008052633A DE102008052633A1 (en) 2008-10-22 2008-10-22 Method and device for producing a packaging unit
PCT/EP2009/007254 WO2010046037A2 (en) 2008-10-22 2009-10-08 Method and device for the production of a packaged unit

Publications (2)

Publication Number Publication Date
EP2219954A2 EP2219954A2 (en) 2010-08-25
EP2219954B1 true EP2219954B1 (en) 2011-12-28

Family

ID=41667251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09740057A Revoked EP2219954B1 (en) 2008-10-22 2009-10-08 Method and device for the production of a packaged unit

Country Status (11)

Country Link
US (2) US9926089B2 (en)
EP (1) EP2219954B1 (en)
AT (1) ATE538998T1 (en)
DE (1) DE102008052633A1 (en)
DK (1) DK2219954T3 (en)
ES (1) ES2376156T3 (en)
HR (1) HRP20120062T1 (en)
PL (1) PL2219954T3 (en)
PT (1) PT2219954E (en)
SI (1) SI2219954T1 (en)
WO (1) WO2010046037A2 (en)

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EP3070009A1 (en) 2015-03-17 2016-09-21 Krones Aktiengesellschaft Device and method for the preparation of shrink film containers
DE102015103919A1 (en) 2015-03-17 2016-09-22 Krones Aktiengesellschaft Apparatus and method for producing shrink-wrapped film

Also Published As

Publication number Publication date
DK2219954T3 (en) 2012-04-10
EP2219954A2 (en) 2010-08-25
US9926089B2 (en) 2018-03-27
US20180222610A1 (en) 2018-08-09
PT2219954E (en) 2012-03-30
WO2010046037A2 (en) 2010-04-29
PL2219954T3 (en) 2012-05-31
ES2376156T3 (en) 2012-03-09
SI2219954T1 (en) 2012-04-30
WO2010046037A3 (en) 2010-07-08
ATE538998T1 (en) 2012-01-15
US20110139664A1 (en) 2011-06-16
HRP20120062T1 (en) 2012-02-29
DE102008052633A1 (en) 2010-04-29

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