EP2554483B1 - Tunnel de rétraction - Google Patents

Tunnel de rétraction Download PDF

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Publication number
EP2554483B1
EP2554483B1 EP20120171775 EP12171775A EP2554483B1 EP 2554483 B1 EP2554483 B1 EP 2554483B1 EP 20120171775 EP20120171775 EP 20120171775 EP 12171775 A EP12171775 A EP 12171775A EP 2554483 B1 EP2554483 B1 EP 2554483B1
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EP
European Patent Office
Prior art keywords
shrink
medium
shaft wall
shrink wrap
wrap medium
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.)
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Application number
EP20120171775
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German (de)
English (en)
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EP2554483A1 (fr
Inventor
Christian Napravnik
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Krones AG
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Krones AG
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Publication of EP2554483A1 publication Critical patent/EP2554483A1/fr
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    • 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
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/063—Tunnels

Definitions

  • the present invention relates to a shrink tunnel for shrinking packaging means around a collection of articles, wherein the shrink tunnel comprises at least one transport plane with a transport path for wrapped with packaging material article and at least two well walls over which the wrapped with the packaging material articles are acted upon by a shrinking medium , Furthermore, the invention relates to a method for shrinkingmaschinesmittein to a collection of articles, wherein shrinkage medium is passed from shaft walls in a shrink tunnel.
  • the prior art discloses methods and devices for packaging articles (packaged goods) which use a shrink film as the packaging wrapper for the articles.
  • This shrink film is generally wrapped as a film blank by means of a wrapping system around the article assembly.
  • This so-called container is transported through a shrink tunnel.
  • the wrapped articles are heated with hot gas, e.g. warm or hot air acted as shrinking medium, whereby the shrink film contracts, so that it conforms to the article and the finished shrinkage package is formed.
  • the packages are processed in the shrink tunnel in several parallel paths.
  • means for introducing the warm air must also be provided, which inject the shrinkage medium between the articles guided in parallel.
  • shrink tunnels with at least one middle shaft wall are used for the multi-lane processing. This inner shaft wall has nozzle openings on both side walls, so that hot air flows out to both sides into the interior of the shrink tunnel.
  • the known shaft walls are walls with an internal cavity into which the hot air is blown.
  • the shaft walls each have at least one, preferably in the upper region arranged air inlet opening, through which the hot air is blown from above into the shaft wall and then flows through the nozzle openings into the interior of the shrink tunnel.
  • DE 4038417 A1 describes a vertically movable heating frame in which hot air is blown from a fan and passed through channels with slot nozzles in the interior of the shrinking device.
  • the introduced air is divided here by means of a partition wall.
  • the first part of the hot air is passed directly into the interior of a first channel of the shrinking device, the second part of the hot air is continued in a second channel arranged perpendicular thereto and from there into the interior of the shrinking device.
  • DE 102007049441 A1 discloses a shrink tunnel having a plurality of gas supply means which supply the hot gas for shrinking the package.
  • the gas supply devices are designed in particular as shaft walls, each with a gas-tight inner partition wall.
  • the two resulting shafts of each gas supply device each have their own supply port for gaseous medium.
  • the partition is arranged diagonally, whereby the two flow chambers are arranged symmetrically to each other.
  • the shaft walls have nozzle openings through which the hot gas flows uniformly and preferably substantially horizontally, ie parallel to the transport plane, into the interior of the shrinking tunnel.
  • the document US 4066866 describes a shrinking device which is used in particular to shrink bands around containers.
  • laterally arranged “diffuser housings” are provided. These each have longitudinally arranged slots for introducing shrinkage medium in decreasing height of the container. Furthermore, a lateral supply of shrinking agent in so-called “diffuser housings”.
  • FIG. 1 shows a schematic view of a shrinking device 1 according to the known prior art.
  • Articles, in particular beverage containers, bottles 6, cans or the like are assembled in groups and wrapped with shrink film 7. These Arrangements are also referred to as containers 5.
  • the containers 5 are fed in the transport direction TR on a conveyor belt 10 to a shrink tunnel 2.
  • heating means (not shown) are arranged, which act on the container 5, for example, with hot air and the film 7 shrinks around the bottles 6. After the bundles 5 have left the shrink tunnel 2, they are cooled by cold air 22 arranged above the conveyor belt 10.
  • FIG. 2 shows a cross section through a shrink tunnel 2 with two transport paths 11 for containers (not shown). Via so-called shaft walls 30, 32 hot air 40 is blown into the interior of the shrink tunnel 2.
  • the outer shaft walls 30 have nozzle openings 35 for the hot air 40 only at their side walls 31 directed towards the interior 34 of the shrinking tunnel 2.
  • the inner shaft wall 32 has nozzle openings 35 for the hot air 40 on both side surfaces 33.
  • the transport section 11 has means 24 with which the containers are additionally subjected to hot air 41 from below.
  • FIG. 3 shows a cross section through an inner shaft wall 32 having 33 nozzle openings 35 for the hot air 40 at both side surfaces.
  • the hot air 40 is blown from above via an upper distributor channel 45 into the interior 34 of the shaft wall 32 and thus exits in a downwardly directed jet from the respective nozzle openings 35.
  • the flow direction of the emerging from the shaft wall 32 hot air 40 is thus largely opposite to that in FIG. 2 additionally shown flow of hot air 41 from below.
  • the outflow field of the hot air 40 is not uniform in the device shown.
  • the outflow amount of hot air 40 in the upper region of the shaft wall 32 is higher than in the lower region.
  • the object of the invention is to produce an advantageous direction of flow of the shrinking agent in order to circumvent the disadvantages of the known arrangements described above.
  • the invention relates to a shrink tunnel for shrinking packaging means around a collection of articles.
  • a shrink tunnel is used to shrink film around beverage containers, in particular bottles or the like. shrink.
  • These wrap-wrapped product compilations are also referred to as packagings.
  • shrink tunnels are used, for example, to group together on pallets packaged bundles into larger packaging units, shrink labels on articles, or similar.
  • a shrink tunnel comprises at least one transport route, in particular a conveyor belt or the like. for the articles wrapped with the packaging material. Furthermore, the shrink tunnel comprises at least two shaft walls arranged on both sides of the transport route, via which the shrinkage medium is conducted onto the shrink film wrapped around the articles.
  • the shrinkage medium is produced by means of a blower or the like, for example by means of a hot air blower, and passed from above into the shaft walls.
  • a distribution channel is arranged above each shaft wall, via which a shrinkage medium is directed into the respective shaft wall directed downwards in a first flow direction.
  • the shrinking medium is passed into the interior of the shrink tunnel.
  • the shaft walls each comprise at least one outflow surface with nozzle openings facing an interior space of the shrinking tunnel, via which the shrinkage medium is applied to the articles enveloped by the packaging means.
  • At least one hot air blower can be provided below the transport path, which blows hot air through the conveyor belt onto the underside of the packs, etc.
  • the shaft walls each comprise at least one diverting device for the shrinking medium, by means of which the flow direction of the shrinking medium is largely reversible.
  • the first flow direction of the shrinking medium directed downward within the shaft wall through the at least one diverting device becomes at least substantially upward directed second flow direction of the flowing through the nozzle openings in the interior of the shrinking shrinking medium largely reversed.
  • the diverting device is a guide plate or a so-called turning channel, wherein the shaft wall is subdivided by the guide plate into at least one inflow region for the shrinkage medium and at least one outflow region for the shrinkage medium.
  • the diverting device subdivides the shaft wall in such a way that the side surface of the shaft wall facing the interior of the shrink tunnel and thus the articles to be acted upon by shrinkage medium comprises the outflow region for the shrinkage medium.
  • the shaft wall is a lateral or outer shaft wall, in which only one side surface arranged perpendicular to the transport surface faces the interior of the shrink tunnel, while the other side surface arranged perpendicular to the transport surface forms, for example, an outer wall of the shrink tunnel, then preferably a diverting device is provided arranged within the shaft wall, that the shaft wall is divided into an outer inflow region and an inner Ausströmungs Symposium.
  • the shaft wall is an inner shaft wall in which both lateral surfaces arranged perpendicular to the transport surface each face an inner region of the shrink tunnel, then preferably two bypass devices are arranged within the shaft wall such that the shaft wall is divided into a central inflow region and two outer outflow regions becomes.
  • the inflow region and the outflow region or the outflow regions are fluidically separated from one another in the upper region of the shaft wall.
  • the shrinkage medium introduced from above into the inflow region of the shaft wall is thus guided downwards within the inflow region in the shaft wall along the diverting device.
  • the inflow region and the outflow region or the outflow regions are fluidically connected to one another.
  • there is no diversion device in this area there is no diversion device in this area.
  • the inflowing from above shrinking medium is around a lower guide contour of the diverter around in the Outflow area directed. In particular, this results in a substantial reversal of direction of the flow direction of the shrinking medium.
  • the shrinkage medium in the inflow region of the shaft wall in a first flow direction is substantially perpendicular to the transport plane in the direction thereof, i. down, guided.
  • a change in direction takes place so that the shrinking medium is now guided upwards away from the transport plane.
  • the shrinking medium is guided at an angle of about 45 ° to 90 ° to the transport plane, preferably at an angle of about 70 ° to 90 ° to the transport plane, in particular approximately substantially perpendicular away from the transport plane in the outflow region of the shaft wall upwards.
  • a distribution channel for the shrinkage medium is arranged above the shaft wall.
  • the length of the distribution channel corresponds to the length of the respective shaft wall.
  • the distribution channel is associated with, for example, a hot air blower or another suitable hot air generator.
  • the shrinkage medium is conducted via the distributor channel into the inflow region of the shaft wall.
  • the shrink medium is fed centrally into the distribution channel.
  • the distribution channel preferably has a maximum total height in the region of the feed, which preferably decreases uniformly in each case along both sides along the chess wall.
  • the distribution channel has substantially triangular side surfaces and a hexagonal or orthogonal underside.
  • the top of the distribution channel consists of two equal, mirror-symmetrical opposite each other trapezoidal surfaces and / or a centrally arranged rectangular area.
  • the arrangement described leads to a reduction in the height of the distribution channel in the direction of the two ends, ie the beginning and the end of the distribution channel.
  • the distribution channel has its maximum width in the central region and in each case a smaller width in the end regions.
  • the feed for the shrinkage medium is preferably carried out in the region of the centrally arranged rectangular surface or in the region of the common edge of the trapezoidal surfaces.
  • the shrinkage medium is distributed over the entire channel length, ie in and against the transport direction for the containers.
  • the channel length corresponds to the length of the shaft walls and thus the running length of the wrapped articles in the shrink tunnel.
  • the combination of the described shape of the distribution channel with the new type of flow guidance through the diverters, wherein the shrink medium is first led down in the direction of the transport surface and then deflected by about 120 ° to substantially 180 ° leads to an improved uniform distribution of Flow of the shrinking medium.
  • all streams of the shrink medium i. both the upward flow from a below the transport path arranged bottom chamber, and the streams from the shaft walls, away from the transport surface upwards.
  • an upward overlap of packaging means is supported by the upwardly directed flows of the shrinking medium and is not pressed down in the wrong direction.
  • a vortex formation of the shrinking medium is prevented or reduced, which occurs in the conventionally used shrink tunnels due to the opposite flow directions of the shrinking medium from the bottom region and from the shaft walls.
  • the exit angle at which the shrinkage medium is blown into the interior of the shrink tunnel can be selectively influenced by the selection of suitable directed nozzle openings in the side wall of the shaft wall.
  • adjustable nozzles can be used.
  • the diverting device for the shrinkage medium is at least partially permeable.
  • the diverter is over a A plurality of air-impermeable connecting elements attached to the associated flow surface.
  • a plurality of superposed outflow chambers is formed.
  • These outflow chambers are independent fluidic units.
  • Each of these outflow chambers is associated with at least one nozzle or nozzle row from which the shrinkage medium, which now points far upwards, flows into the interior of the shrinking tunnel.
  • the invention further relates to a method of shrinking packaging means around a collection of articles wherein shrinkage medium is directed from side well walls into a shrink tunnel.
  • shrinkage medium is introduced from a distribution channel in a first downwardly directed flow direction into the shaft walls and passed through nozzle openings in the side walls of the shaft walls in the shrink tunnel.
  • the downwardly directed first flow direction of the shrinkage medium within the shaft walls is largely reversed.
  • the shrinkage medium flowing out of the shaft walls thus has substantially the same flow direction as the shrinkage medium which is directed through the transport surface from below onto the bottom region of the article assemblies.
  • the flow direction of the shrinkage medium flowing out of the shaft walls is thus directed upward from the transport plane; in particular, the shrinkage medium leaves the shaft walls at an exit angle between 0 ° and 60 ° to the plane of the shaft walls, preferably at an exit angle of 5 ° to 25 ° Level of the shaft walls.
  • the shrinkage medium from the shaft walls thus flows the article compositions also largely from below. This is particularly advantageous since upwardly projecting packaging projections are now not pressed down by the shrinkage medium.
  • the shrinkage medium is introduced via a distributor channel from above into an inflow region of the shaft wall.
  • the shrinkage medium is directed downwardly along a diverter located within the well wall.
  • the diverting device has no connection to the base surface of the shaft wall in the lower region of the shaft wall, so that the shrinkage medium at a lower guide contour of the diverting device into an outflow region of the Shaft wall is redirected.
  • the flow direction of the shrinking medium changes, so that it now largely has the opposite flow direction.
  • the shrinkage medium now flows upwards, largely parallel to the outside of the shaft wall.
  • the shrinking medium is now passed through nozzle openings in the outflow surface of the shaft wall into the interior of the shrink tunnel, wherein the angle at which the shrinkage medium is conducted into the tunnel can be adjusted by the angle of attack of the nozzle openings can n.
  • FIGS. 1 to 3 have already been described in the prior art.
  • FIG. 4 shows a cross section through a shrink tunnel 3 with an inventively modified inner shaft wall 60 and inventively modified outer shaft walls 50.
  • the shrink tunnel 3 comprises two transport lanes 11 for container 5. Below the transport plane TE hot air generator 24 are arranged.
  • the hot air 41 serves as a shrinking medium and is directed upward through the transport plane to the bottom of the container 5.
  • the shaft walls 50, 60 have at least at the interior surfaces 34 of the shrink tunnel 3 facing side surfaces 52, 62 nozzle openings 54, 64, is introduced through the hot air 42 in the shrink tunnel 3.
  • the hot air 42 supplied via the shaft walls 50, 60 has an upwardly directed flow vector.
  • FIG. 5 shows a cross section through a first embodiment of an inner shaft wall 60a with two diverters 70.
  • an inner shaft wall 60a both perpendicular to the transport plane TE arranged side surfaces 62 for shrinking medium, in particular for hot air 42 are permeable.
  • the side surfaces 62 preferably have so-called nozzle openings 64.
  • Above the shaft wall 60a is a distribution channel 80, via which the hot air 42 is conducted into the shaft wall 60a.
  • the hot air 42 in the distribution channel 80 is generated, for example, via a hot air blower (not shown) associated with the distribution channel 80.
  • the diverters 70 divide the hoistway wall 60a into a central inflow chamber 74 and two outer outflow chambers 76.
  • the hot air 42 is directed via the manifold 80 into the inflow chamber 74 of the hoistway wall 60a.
  • the hot air 42 is directed downwardly within the inflow chamber 74 of the well wall 60a along the diverters 70 in a first flow direction SR1.
  • the hot air 42 is diverted in this lower region over the contour of the diversion devices 70 into the outflow chambers 76.
  • the adjacent to the interior of the shrink tunnel side surfaces of the outflow chambers 76th correspond to the hot air 42 permeable side surfaces 62. Via the nozzle openings 64 of the side surfaces 62, the hot air 42 is blown into the interior of the shrink tunnel.
  • the diversion devices 70 are arranged obliquely within the shaft wall 60a.
  • the diverters 70 are secured to the respective side walls 62 of the hoistway wall 60a in the upper region, which is directly adjacent to the distribution channel 80.
  • the diversion devices 70 run at an angle ⁇ to the respective side wall 62 in the interior of the shaft wall 60a, so that the distance between the side wall 62 and diversion devices 70 in the lower region of the shaft wall 60a is greater than the distance between the side wall 62 and the diversion device 70 in an overlying region ,
  • the desired flow profile can be adjusted accordingly via this so-called setting angle ⁇ .
  • the angle of attack ⁇ of the diverting devices 70 within the shaft wall 60a can be changed.
  • the diverters 70 may be attached to the insides of the sidewalls 62 via a controllable hinge or the like. be attached.
  • the exit angle ⁇ in which the hot air 42 flows from the shaft wall 60a into the interior of the shrink tunnel, can be influenced in a targeted manner by the selection of suitable directed nozzle openings 64. It is also possible to use adjustable nozzles 64. In particular, adjustable nozzles 64, with which the outlet angle ⁇ can be changed and / or the opening size of which can be set, so that the amount of hot air 42 flowing out can be selectively changed, can be used. Furthermore, it can be advantageous if individual and / or nozzles 64 that are connected in functional groups can be selectively closed, so that no hot air is supplied in certain areas of the shrinking tunnel. Thus, an optimal adaptation of the supply of hot air 42 to the respective product is possible.
  • the nozzles 64 are closed in the upper region of the shaft wall 60a and thus the hot air supply in the lower region is increased with the same expenditure of energy. Or the nozzles 64 in the upper region of the shaft wall 60a are closed and at the same time the supply of hot air is reduced, whereby the energy consumption can be reduced accordingly.
  • FIG. 6 shows a cross section through a second embodiment of an outer shaft wall 50a with a diverter 70.
  • the pointing into the interior of the shrink tunnel side wall 52 is provided with nozzle openings 54, while the outwardly facing side wall 51 has no nozzles.
  • the operation corresponds essentially to the operation of the inner shaft wall 60a, which is why the description of the FIG. 5 is referenced.
  • FIG. 7 shows a cross section through a third embodiment of an inner shaft wall 60b with two diverters 70
  • FIG. 8 shows a cross section through a fourth embodiment of an outer shaft wall 50b with a diverter 70.
  • the diverters 70 are each arranged substantially parallel to the side walls 52, 62 provided with nozzle openings 54, 64.
  • the inflow chambers 74 and the outflow chambers 76 are fluidically separated from one another in the region between the distribution channel 80 and the shaft wall 50b, 60b are so that the hot air 42 along the diverters 70 within the shaft walls 50b, 60b, in particular within the inflow chambers 74, downwardly directed and redirected in the lower region of the shaft walls 50b, 60b in the outflow chambers 76.
  • FIG. 5 For further features, please refer to the full description of FIG. 5 directed.
  • FIG. 9 shows a shaft wall 50, 60 with distribution channel 80 for a shrink tunnel.
  • the distribution channel 80 has substantially triangular side surfaces 84 and an orthogonal underside.
  • the upper side of the distribution channel 80 consists of two identical, mirror-symmetrically opposite each other trapezoidal surfaces 85 and a centrally disposed rectangular surface 86th
  • the feed 82 for the shrinkage medium (not shown) is arranged.
  • this is a supply of hot air from a hot air blower or the like.
  • the illustrated construction of the distribution channel 80 leads to a reduction in the maximum height H1 in the central region of the distribution channel 80 in the direction of the two ends of the distribution channel 80, where this only has one height H2. Furthermore, the distribution channel 80 in the region of the centrally arranged rectangular surface 86 has its greatest width B1. In the respective end regions, the channel in each case has a reduced width B2. Due to the described construction of the distribution channel 80, the inflowing shrinkage medium 42 distributes particularly well and quickly over the entire length of the distribution channel 80 and is introduced from there down into the shaft wall 50, 60.
  • FIG. 10 shows a cross section through a fifth embodiment of an inner shaft wall 60c with divided diverters 70 and FIG. 11 shows an enlarged partial section A. Also in this embodiment, both side perpendicular to the transport plane TE arranged side surfaces 62 for hot air 42 are permeable and have nozzle openings 64. The hot air 42 is passed through a distribution channel 80 in the inflow chamber 74 of the shaft wall 60 c.
  • the diverter 72 is at least partially permeable to the hot air 42.
  • a plurality of turning channels 73 and outflow chambers 78 is formed between the outflow surface 62 of the shaft wall 60c and the diverter 72.
  • each of these outflow chambers 78 is assigned at least one nozzle opening 64 for outflowing hot air 42.
  • the overall construction has a higher rigidity.
  • the flow resistance is lower in this embodiment.
  • the at least partially continuous or air-permeable diverter 72 may, for example, by a perforated plate o.ä. are formed, that is secured by a plurality of connecting elements 92 at an angle ⁇ to the side surface 62 of the shaft wall 60c.
  • the connecting elements 92 are impermeable to air and arranged at a distance from one another in such a way that outflow chambers 78 are formed between the diversion device 72 and the side surface 62.
  • Each of these outflow chambers 78 is associated with at least one nozzle 64.
  • each outflow chamber 78 is assigned in each case at least one row of nozzles.
  • the openings in the diverter 72 are each disposed below the associated nozzles 64 of the respective outflow chamber 78. This causes an upward movement of the hot air 42 within the outflow chamber 78, thus assisting the upward flow movement of the hot air from the nozzles 64 into the interior of the shrink tunnel.
  • the at least partially continuous diversion device 72 can, according to another embodiment, be formed, for example, by a plurality of metal sheets 90 arranged parallel to one another in a plane, wherein two adjacent metal sheets 90 are arranged at a distance d from each other, which permits the entry of hot air from the inflow chamber 74 allows the respective outflow chamber 78.
  • the sheets 90 are each fastened to connecting elements 92.
  • the connecting elements 92 are fastened at their opposite end to the side surface 62 of the shaft wall 60c, so that they simultaneously limit the individual outflow chambers 78 upwards or downwards.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Packages (AREA)

Claims (15)

  1. Tunnel de rétraction (2, 3) destiné à faire rétracter des moyens d'emballage (7) autour d'un ensemble d'articles (6), ledit tunnel de rétraction (2) comprenant un plan de transport (TE) avec au moins une section de transport (10) pour les articles (6) enveloppés de moyen d'emballage (7) ainsi qu'au moins deux parois de puits (50, 60) agencées de part et d'autre le long de ladite section de transport (10), au-dessus de chaque paroi de puits (50, 60) étant disposé un canal de distribution (80) par lequel un milieu de rétraction (42) peut être introduit dans la paroi de puits (50, 60) respective, dans une première direction d'écoulement (SR1), de manière à être dirigé vers le bas, et les parois de puits (50, 60) comprenant chacune au moins une surface d'échappement (62) tournée vers un volume intérieur (34) du tunnel de rétraction (2) et ayant des orifices de sortie (35) par lesquels les articles (6) enveloppés du moyen d'emballage (7) peuvent être soumis à un milieu de rétraction (42), caractérisé par le fait que les parois de puits (50, 60) comprennent chacune au moins un dispositif de déviation (70) pour le milieu de rétraction (42), la première direction d'écoulement (SR1) du milieu de rétraction (42) qui est dirigée vers le bas à l'intérieur de la paroi de puits (50, 60) pouvant être inversée par ledit au moins un dispositif de déviation (70) en une deuxième direction d'écoulement (SR2) dirigée, au moins dans une large mesure, vers le haut, du milieu de rétraction (42) s'écoulant via les orifices de sortie (35) dans le volume intérieur (34) du tunnel de rétraction (2).
  2. Tunnel de rétraction (2, 3) selon la revendication 1, dans lequel ledit dispositif de déviation (70) est un contour de guidage, une tôle de guidage ou un canal de retournement (71) pour le milieu de rétraction (42).
  3. Tunnel de rétraction (2, 3) selon la revendication 2, dans lequel ledit dispositif de déviation (70) est disposé de manière à diviser la paroi de puits (50, 60) en au moins une zone d'admission (74) pour le milieu de rétraction (42) et en au moins une zone d'échappement (76) pour le milieu de rétraction (42).
  4. Tunnel de rétraction (2, 3) selon la revendication 3, dans lequel la zone d'admission (74) pour le milieu de rétraction (42) et la zone d'échappement (76) pour le milieu de rétraction (42) sont séparées l'une de l'autre en termes d'écoulement dans la zone supérieure de la paroi de puits (50, 60).
  5. Tunnel de rétraction (2, 3) selon la revendication 3 ou 4, dans lequel la zone d'admission (74) pour le milieu de rétraction (42) et la zone d'échappement (76) pour le milieu de rétraction (42) sont reliées l'une à l'autre en termes d'écoulement dans la zone inférieure de la paroi de puits (50, 60).
  6. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 3 à 5, dans lequel une première direction d'écoulement (SR1) du milieu de rétraction (42) dans ladite zone d'admission (74) de la paroi de puits (50, 60) est dirigée dans une large mesure vers le bas en direction du plan de transport (TE), la première direction d'écoulement (SR1) du milieu de rétraction (42) pouvant être dans une large mesure inversée dans la zone inférieure de la paroi de puits (50, 60) par ledit dispositif de déviation (70), de sorte que la deuxième direction d'écoulement (SR2) du milieu de rétraction (42), dans la zone d'échappement (76) de la paroi de puits (50, 60), est dirigée dans une large mesure vers le haut de manière à être opposée au plan de transport (TE).
  7. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 3 à 5, dans lequel un canal de distribution (80) est prévu au-dessus de la paroi de puits (50, 60) pour l'admission du milieu de rétraction (42), le milieu de rétraction (42) pouvant être mené depuis ledit canal de distribution (80) dans ladite au moins une zone d'admission (74) de la paroi de puits (50, 60).
  8. Tunnel de rétraction (2, 3) selon la revendication 7, dans lequel ledit canal de distribution (80) prévoit une injection (82) pour le milieu de rétraction (42) qui est disposée dans une large mesure au milieu.
  9. Tunnel de rétraction (2, 3) selon la revendication 7 ou 8, dans lequel ledit canal de distribution (80) présente des surfaces latérales (84) dans une large mesure triangulaire et une face inférieure hexagonale ou orthogonale.
  10. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 7 à 9, dans lequel la face supérieure du canal de distribution (80) se compose de deux surfaces trapézoïdales (85) identiques situées à symétrie spéculaire l'une en regard de l'autre et / ou d'une surface rectangulaire (86) disposée entre lesdites surfaces trapézoïdales (85).
  11. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 1 à 10, dans lequel le milieu de rétraction (42) mené depuis les parois de puits (50, 60) dans le volume intérieur du tunnel de rétraction (3) est dirigé dans une large mesure vers le haut.
  12. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 1 à 11, dans lequel le tunnel de rétraction (3) comprend deux parois de puits extérieures et au moins une paroi de puits intérieure (50, 60), les parois de puits extérieures (50) comprenant chacune un dispositif de déviation (70) pour le milieu de rétraction (42), et ladite au moins une paroi de puits intérieure (60) comprenant deux dispositifs de déviation (70) pour le milieu de rétraction (42).
  13. Tunnel de rétraction (2, 3) selon l'une quelconque des revendications 1 à 12, dans lequel ledit au moins un dispositif de déviation (72) pour le milieu de rétraction (42) est au moins en partie perméable et est fixé par une pluralité d'éléments de liaison (92) étanches à l'air, en formant une pluralité de chambres d'échappement (78) superposées, sur une surface d'écoulement (62) de la paroi de puits (50, 60).
  14. Procédé de rétraction de moyens d'emballage (7) autour d'un ensemble d'articles (6), du milieu de rétraction (42) étant injecté depuis un canal de distribution (80), dans une première direction d'écoulement (SR1) dirigée vers le bas, dans des parois de puits, et le milieu de rétraction (40, 42) étant injecté via des orifices de sortie (35) depuis les parois de puits (50, 60) dans un tunnel de rétraction (2, 3), caractérisé par le fait que la première direction d'écoulement dirigée vers le bas (SR1) du milieu de rétraction (42) est dans une large mesure inversée à l'intérieur des parois de puits (50, 60) de sorte que le milieu de rétraction (40, 42) s'échappe dans une deuxième direction d'écoulement (SR2) dirigée dans une large mesure vers le haut, via les orifices de sortie (35), dans le volume intérieur (34) du tunnel de rétraction (2).
  15. Procédé selon la revendication 14, dans lequel le milieu de rétraction (42) est injecté via un canal de distribution (80) d'en haut dans au moins une zone d'admission (74) de la paroi de puits (50, 60), le milieu de rétraction (42) étant mené vers le bas le long d'un dispositif de déviation (70) à l'intérieur de la paroi de puits (50, 60), et le milieu de rétraction (42) étant dévié, sur une zone inférieure du dispositif de déviation (70), dans une zone d'échappement (76) de la paroi de puits (50, 60) de sorte que la direction d'écoulement (SR2) du milieu de rétraction (42) dans la zone d'échappement (76) est dans une large mesure inversée par rapport à la direction d'écoulement (SR1) du milieu de rétraction (42) dans la zone d'admission (74), et le milieu de rétraction (42) étant mené, dans la zone d'échappement, via des orifices de sortie (54, 64) ménagés dans la paroi de puits (50, 60), dans la zone intérieure du tunnel de rétraction (3).
EP20120171775 2011-08-02 2012-06-13 Tunnel de rétraction Active EP2554483B1 (fr)

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DE102011052353A DE102011052353A1 (de) 2011-08-02 2011-08-02 Schrumpftunnel

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DE102013101484A1 (de) * 2013-02-14 2014-08-14 Krones Aktiengesellschaft Schrumpfvorrichtung
DE102013101483A1 (de) * 2013-02-14 2014-08-14 Krones Aktiengesellschaft Schrumpfvorrichtung
DE102013101477A1 (de) * 2013-02-14 2014-08-14 Krones Aktiengesellschaft Schrumpfvorrichtung
DE102013101782A1 (de) * 2013-02-22 2014-08-28 Khs Gmbh Schrumpftunnelanlage sowie ein zugehöriges Verfahren zum Aufschrumpfen einer Schrumpffolie auf Packformationen
DE102014105057A1 (de) * 2014-04-09 2015-10-15 Krones Aktiengesellschaft SCHRUMPFVORRICHTUNG MIT GEBINDEKÜHLUNG UND VERFAHREN ZUM ERZEUGEN EINES GLEICHMÄßIGEN, HOMOGENEN KÜHLMITTELSTROMS
DE102017119145A1 (de) 2017-08-22 2019-02-28 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zum Ansaugen von Luft aus einem Innenraum einer Schrumpfvorrichtung
DE102017215414A1 (de) 2017-09-04 2019-03-07 Krones Aktiengesellschaft Schachtwand, Schrumpfvorrichtung und Verfahren zur Herstellung einer Schachtwand für eine Schrumpfvorrichtung
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DE102011052353A1 (de) 2013-02-07
CN102910321B (zh) 2014-07-23
EP2554483A1 (fr) 2013-02-06
CN102910321A (zh) 2013-02-06

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