EP2653394B1 - Dispositif de rétractation avec baguette d'obturation - Google Patents

Dispositif de rétractation avec baguette d'obturation Download PDF

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Publication number
EP2653394B1
EP2653394B1 EP13163312.5A EP13163312A EP2653394B1 EP 2653394 B1 EP2653394 B1 EP 2653394B1 EP 13163312 A EP13163312 A EP 13163312A EP 2653394 B1 EP2653394 B1 EP 2653394B1
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EP
European Patent Office
Prior art keywords
cover
nozzle
shrinking
shrinking apparatus
tiles
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.)
Active
Application number
EP13163312.5A
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German (de)
English (en)
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EP2653394A1 (fr
Inventor
Christian Napravnik
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.)
Krones AG
Original Assignee
Krones AG
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=48095653&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2653394(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE102012103402.8A external-priority patent/DE102012103402B4/de
Priority claimed from DE102012103398.6A external-priority patent/DE102012103398B4/de
Application filed by Krones AG filed Critical Krones AG
Publication of EP2653394A1 publication Critical patent/EP2653394A1/fr
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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
    • 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
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/001—Arrangements to enable adjustments related to the product to be packaged
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance
    • 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
    • B65B53/066—Mobile frames, hoods, posts or the like

Definitions

  • the present invention relates to a shrinking device and a method for heat-shrinking film around articles or article assemblies according to the features of the preambles of claims 1 and 15.
  • the containers are processed in the shrink tunnel in several parallel paths.
  • means for introducing the warm air must also be provided, which inject the warm air acting as 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 wall surfaces, so that hot air flows out to both sides into the interior of the shrink tunnel.
  • the well walls known from the prior art 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.
  • the articles or containers typically have different sensitive areas. For this reason, it is advantageous if certain areas are less exposed to hot air.
  • EP 2 319 769 A Shaft walls with a plurality of nozzles. These are arranged in rows. The respective rows of nozzles are associated with means for adjusting the amount and / or the flow angle of the hot gas stream.
  • the means each comprise alternating nozzle plates, which are insertable in holders, wherein the Changing nozzle plates in particular parallel to the shaft wall are movable and interchangeable. This should allow the shrink tunnel to be adapted to the height of the packaged goods, thereby achieving an improved shrink quality
  • the object of the invention is to achieve an optimal loading of containers or articles with shrinking medium in a shrinking device, so that sensitive areas of the container or article can be selectively protected, the thermodynamic operating state in the shrinking device remains largely unaffected.
  • the invention relates to a shrinking device for heat shrinking of film to article or article compositions.
  • the shrinking device comprises at least one interior space with a transport path for the articles or article assemblies and at least one means for feeding a shrinking medium into the interior of the shrinking device.
  • the interior comprises at least one, preferably at least two shaft walls with a first length and in each case at least one nozzle surface facing the interior of the shrinking device.
  • the nozzle surface comprises a plurality of nozzles directed towards the articles or article assemblies arranged in preferably parallel rows of nozzles. Through the nozzles, the shrinkage medium is passed in a flow direction from the shaft walls in the interior.
  • At least one movable diaphragm strip is assigned to the at least one nozzle surface of the shaft wall.
  • the trim strip has a second length, which corresponds largely to the first length of the shaft wall.
  • the cover strip In a first Working position, the cover strip is largely associated with an upper edge of the shaft wall. If the entire side wall surface is formed as a nozzle surface in the corresponding shaft wall, the cover strip in the first working position blocks the at least one or preferably at least two or at least three upper rows of nozzles of the shaft wall or nozzle surface.
  • the cover strip in the first working position can be arranged above the nozzle surface in such a way that no nozzle rows are dimmed.
  • the cover strip By a vertical movement, the cover strip can be moved into at least one second working position in which the cover strip is at least one nozzle row upstream and spaced therefrom.
  • the cover strip comprises at least one subregion, which the shrinking medium can not penetrate, so that the flow direction of the shrinking medium is deflected in this subregion.
  • no shrinkage medium directly on the article or article compositions in the height of the nozzle surface, in which the at least one shrinkage medium-impermeable portion of the at least one cover strip is now arranged, no shrinkage medium directly on the article or article compositions.
  • the distance between the nozzle surface and the cover strip is chosen so that the shrinking medium can emerge freely from the dimmed nozzle rows, but bounces off the cover strip and is thereby deflected up or down and thus in the at least one section above and / or below the cover strip in the interior of the interior flows or is introduced.
  • the distance between the nozzle surface and the cover strip is at least 0.5 times the diameter of a nozzle. In this way, a specific area of the articles or article compilations, at least in a partial region of the shrinking device along the transport path, can be specifically protected from direct flow against the shrinkage medium.
  • shrink film is shrunk around an article compilation as an outer packaging
  • the shrink film is first wrapped around the article compilation in a film wrapping device. Laterally, so-called foil eyes remain open.
  • the wrapped article assemblies are transported on the transport path in the shrinking device, that the film eyes are arranged in planes parallel to the shaft walls. The center axis of the film eyes is accordingly arranged perpendicular to the shaft walls.
  • the Foil eyes are bounded by an upper and a lower foil flap. The upper film tabs should not be pressed down in the shrinking device, as this would hinder the inflow of the shrinking medium through the film eye in the article composition.
  • the shrinkage medium flowing between the articles of the article assembly is necessary to heat the shrink film from the inside and to obtain an optimal shrinkage result. For this reason, it is advantageous if the flow of the shrinking medium from the at least one row of nozzles, which is located at the same height as the upper film tabs, can be dimmed with the cover strip, since thereby the upper film tabs can be stabilized.
  • the second working position corresponds to a positioning of the cover strip at a height in which the cover strip is now assigned at least one row of nozzles below the nozzle rows dimmed in the first working position.
  • the shutter bar can be arranged for example in the second working position so that only the top nozzle row is dimmed.
  • the top two or three rows of nozzles can be dimmed.
  • the cover strip is disposed in front of at least one row of nozzles in a second or in each further working position, so that the flow direction of the shrinking medium is deflected in this area. That is, the shutter bar does not close the nozzles of the row of nozzles tightly, but redirects the flow direction of the shrinking medium in this area, so that at the level of at least one panel bar no shrinking medium directly to the article or article compilations.
  • the shrinkage medium flowing out of the nozzles bounces against the cover strip and is thereby deflected upwards or downwards so that the shrinkage medium flows in above and / or below the cover strip into the interior space.
  • the vertical positioning of the cover strip can be adjusted largely continuously, in particular, this is done automatically and / or controlled by appropriate means for vertical positioning. Alternatively, it is provided that the vertical position of the at least one cover strip can be adjusted manually. Another alternative allows adjustment of the shutter bar in defined steps within a so-called vertical grid.
  • the shrinking device comprises means for adjusting the angle.
  • the angle of the at least one trim strip can be adjusted to the nozzle surface.
  • the cover strip is arranged in a plane parallel to the nozzle surface located substantially perpendicular to the transport plane.
  • the cover strip is at least as wide as the average distance between two adjacent rows of nozzles.
  • nozzle mean distance plus once the nozzle diameter ie the distance between the nozzle center of a first nozzle and the nozzle center of a second nozzle of the adjacent row plus once the nozzle diameter.
  • the nozzle diameter should be understood as the outlet opening of the shrinking medium.
  • the adjustable cover strip preferably has a width of 50mm to 100mm, so that at a mean distance of about 40 mm between two adjacent rows of nozzles flowing out of up to two to four rows of nozzles flowing shrinkage medium can be dimmed simultaneously.
  • the shrinking device may comprise means for horizontal positioning of the cover strip, so that the distance between the nozzle surface and cover strip can be varied.
  • At least two movable diaphragm strips are assigned to the at least one nozzle surface of the shaft wall. These are preferably adjustable independently of each other; This relates in particular to the vertical positioning and / or the angle adjustment and / or the horizontal positioning.
  • the supply of shrinkage medium in two sensitive areas of the article or article composition dimmed or deflected.
  • the area of the upper foil flap can be protected.
  • the label area can be protected, especially with heat-sensitive labels etc.
  • the area of the lower foil flap can be protected. In this area, there is the particular problem that the lower film tab is pressed by the generally downward shrinking means down.
  • the pressure through the shrinkage means is higher than the shrinkage force of the film, then the formation of intact shrink packaging is hindered.
  • three regions can accordingly be protected by dimming the shrinkage medium flow.
  • the area of the upper foil flap, the area of the label and the area of the lower foil flap can be protected at the same time.
  • the nozzles are not closed by the cover strip. Instead, the shrinkage medium flowing out of the dimmed nozzles is deflected at least in some areas. That is, the shrinking medium does not flow directly into the interior of the shrinking device on the article or in this area Article compilations, but only serves an indirect heating, since it causes a further supply of heat into the interior of the shrinking device. As a result, the thermodynamic operating state within the shrinking device remains largely unchanged. In addition, certain areas of the nozzle surface can be hidden more flexibly.
  • the trim strip can also be made at an angle to the nozzle surface to produce an advantageous flow direction.
  • the flow pattern in the shrinking device can be adapted at least in some areas better to the respective product.
  • a further advantage is that the heating times remain unchanged in the tunnel, since only a few nozzles are dimmed and thus no change in the amount of supplied shrinking medium is necessary to keep the flow rate constant.
  • the cover strip consists of a support structure with at least two arranged on the support structure aperture tiles.
  • the panel tiles can for example be attached directly to the support structure or, for example, be arranged on at least two holding elements on the support structure. Alternatively, at least two position units for the arrangement of panel tiles are provided on the support structure.
  • the support structure has a second length which corresponds approximately to the first length of the shaft wall, ie the support structure extends in the transport direction at least substantially along the entire shaft wall.
  • the support structure is designed in particular as a comb-like frame construction.
  • a first frame element forms the so-called comb back.
  • the length of this first frame element corresponds to the second length of the support structure and thus approximately the first length of the shaft wall.
  • the first frame member is constructed so that the shrinkage medium through the first Frame element can flow largely unhindered into the interior of the shrinking device.
  • This first frame member may for example consist of at least two longitudinal struts of the second length, which are interconnected and stabilized by connecting cross struts.
  • first holding elements are arranged, which form the so-called comb teeth.
  • the holding elements are assigned, for example, the stabilizing cross struts.
  • panel tiles can be arranged between or on each two retaining elements.
  • a first holding element simultaneously serves to hold two adjacent aperture tiles, so that three first holding elements are provided for holding two facing tiles, for holding three facing tiles accordingly four first holding elements etc.
  • further second holding elements for be provided additional support and / or stabilization of the diaphragm tiles.
  • At least two diaphragm tiles can be arranged successively on the support structure in the transport direction.
  • the support structure is divided by the arrangement of the holding means in a plurality, in particular five or six position units for diaphragm tiles, so that a cover strip can consist of up to five or six consecutively arranged in series on the support structure aperture tiles.
  • the panel tiles each have a third length in the transport direction. The sum of the third lengths of the diaphragm tiles arranged on the support structure is less than or equal to the second length of the support structure or less than or equal to the first length of the shaft wall.
  • the panel tiles can be configured differently.
  • at least two differently shaped aperture tiles are arranged on the support structure.
  • the shutter tiles are simple sheets and serve as so-called baffles. The shrinkage medium flowing out of the dimmed rows of nozzles impinges on the baffle plate and is deflected upwards or downwards so that the shrinkage medium flows above or below the baffle plate into the interior of the shrinking device and does not directly hit the articles or article compilations in this area.
  • special bezel tiles may be configured as so-called concentrating tiles, dividing tiles or alignment tiles with which the shrinkage medium stream can be concentrated, divided and / or aligned.
  • the upper edge and / or the lower edge of the panel tile are associated with guide devices, for example baffles. These lead targeted by the rebound at the diaphragm tile Schrumpfmedium- current in a certain direction in the interior of the shrinking device.
  • the width of an aperture tile can be selected so that at the same time a plurality of nozzle rows are dimmed.
  • a further embodiment of a special concentration tile may contain a smaller number of larger openings, via which the shrinkage medium combined from the plurality of nozzle rows flows concentratedly into the interior space of the shrinking device.
  • the openings may additionally be designed to be directed or additional guide devices, such as baffles or the like. include, so that the concentrated shrinkage medium from these special concentrating tiles directed into the interior of the shrinking device flows.
  • Other special bezel tiles are formed as partitioning tiles or alignment tiles with means for dividing and / or aligning the flow of the shrinking medium.
  • the width of such a special partition tile or alignment tile can be chosen so that it covers the nozzles of only one row of nozzles.
  • the dividing tile or alignment tile itself has a plurality of smaller openings through which the shrinkage medium can thus be injected finer divided into the interior of the shrinking device.
  • the direction of the fine Schrumpfmediumströme can also be adjusted by suitable guide devices targeted.
  • an aperture strip with a plurality of aperture tiles allows a precise adaptation of the shrinkage conditions in the shrinking device along the transport path.
  • differently shaped aperture tiles can be arranged on the support structure.
  • different shaped diaphragm tiles, in particular baffles, concentrating tiles, dividing tiles or alignment tile as described above, can be used, wherein at least one of the panel tiles with a simple baffle or a baffle plate with additional upper and / or lower guide devices. That is, in an arrangement of a number n diaphragm tiles on a support structure, at least one panel tile is a baffle plate, which is prevented at least in this area that shrinking directly meets the article or article compositions.
  • n-1 bezel tiles may be freely selected from the repertoire described above, depending on the requirements of the article / article being treated.
  • all position units on the support structure are equipped with diaphragm tiles, wherein at least one of the diaphragm tiles is a simple baffle plate or a baffle plate with additional upper and / or lower baffles.
  • individual position units are not populated with panel tiles.
  • the shrinkage medium thus flows unhindered and unchanged into the interior of the shrinking device. The effective dimming length of the diaphragm strip is thus reduced by the corresponding missing third lengths of the missing diaphragm tiles.
  • shrink film is shrunk around an article compilation as an outer packaging
  • the shrink film is first wrapped around the article compilation in a film wrapping device. Laterally, so-called foil eyes remain open.
  • the wrapped article assemblies are transported on the transport path in the shrinking device so that the film eyes are arranged in planes parallel to the shaft walls.
  • the center axis of the film eyes is accordingly arranged perpendicular to the shaft walls.
  • shrinkage medium is introduced between the articles on the film eyes, whereby the shrink film is heated from the inside.
  • This can be achieved, for example, by arranging an aperture tile in this area, which deflects the shrinking medium downwards in a targeted manner with a suitable guide device.
  • a suitable guide device This can be both a baffle plate with a lower guide and act as a concentrating or dividing sheet with downwardly directed guide devices.
  • the cover tiles are arranged and / or fastened exchangeably on the support structure without the need for tools or other aids.
  • the holding elements may be formed as receiving units into which the diaphragm tiles can be inserted and no fastening by means of screws, rivets, etc., is necessary, i. the panel tiles are attached via the receiving units releasably attached to the support structure.
  • the panel tiles are each movably attached to the support structure, in particular, the angle of the panel tiles is individually adjustable to the support structure.
  • the angle of each aperture tile arranged on the support structure can each be adjusted independently of the other aperture tiles arranged on the support structure.
  • the construction of the cover strip of support structure and aperture tiles according to a preferred embodiment allows individual adjustment of the shrinkage conditions in areas along the transport path within the shrinking device. Because of the Aperture tiles of the cover strip, the nozzles are not closed, but the outflowing shrinkage medium is only deflected, the thermodynamic operating state remains largely unchanged within the shrinking device. In addition, the direction of the shrinking medium flowing into the interior of the shrinking device can be adjusted more flexibly in certain regions of the nozzle surface. The flow pattern in the shrinking device can be even better adapted to the respective product with the use of a cover strip with trim tiles. A further advantage is that the heating times remain unchanged in the tunnel, since only a few nozzles are dimmed targeted and thus no change in the amount of supplied shrinking medium is necessary to keep the flow rate of the shrinking medium constant.
  • a further advantage is that already existing shrinking devices with shaft walls can be retrofitted with corresponding trim strips with trim tiles. In order to achieve the described functionality, the consumer does not necessarily have to purchase a new shrinking device.
  • the invention further relates to a method of heat shrinking film around articles or article assemblies in a shrinking device as described.
  • a method of heat shrinking film around articles or article assemblies in a shrinking device as described.
  • at least one individual nozzle row of the at least one nozzle surface is dimmed at least in regions, so that the shrinkage medium flowing from the nozzles of the dimmed nozzle row into the interior of the shrinking device is deflected in the region of the dimmed nozzle row and does not strike the articles or article assemblies directly.
  • the at least one row of nozzles is dimmed by at least one vertically movable, the nozzle surface upstream diaphragm strip whose second length largely corresponds to the first length of the shaft wall, is positioned in front of the respective nozzle row.
  • FIG. 1 shows a schematic view of a shrink tunnel 1 with shaft wall technology.
  • the shrink tunnel 1 is suitable for the two-lane, ie the parallel processing of two articles or containers 10.
  • the shrink tunnel 1 comprises two interiors 2 and a total of three shaft walls 3.
  • an inner shaft wall 5 is arranged, both parallel to the transport direction of the container 10 arranged side wall surfaces 9 each facing an inner space 2 and both are each at least partially formed as a nozzle surface 6, wherein the nozzles 8 are preferably arranged in rows ,
  • the containers 10 are moved through a common conveyor belt 11 through the shrink tunnel 1.
  • the shrinkage medium 7, for example, hot air, is blown into the shaft walls 3 and escapes through nozzles 8 in the nozzle surfaces 6 in the respective interior 2.
  • a uniform outflow of the shrinking medium 7 over the entire nozzle surface 6 of the shaft walls 4, 5 is achieved.
  • the disadvantage here is that delicate container positions can not be protected relative to other positions.
  • FIG. 2 shows adjustable prior art nozzle surface locking plates 12. These are movably arranged on the interior 2 facing side wall surfaces 9 and can be moved on this in a vertical movement Bv from top to bottom or from bottom to top.
  • AP1 * in which the nozzle surface locking plates 12 are arranged above the respective nozzle surfaces 6 and which is used especially for containers 10a of tall bottles 13a, can now be closed from the top row of nozzles 8 * for nozzle row 8 * closed to the shrink tunnel to adapt to the height of the packaged goods.
  • a second working position AP2 * of the nozzle surface locking plates 12, in which the top three rows of nozzles 8 * are closed by way of example, is used, for example, for processing containers 10b of bottles 13b having a smaller height (cf. Figure 2B).
  • Figure 2C put that second extreme case of a third working position AP3 *, in which the nozzle surface closing plates 12 are in the lowest position or in an end position and thus close the entire nozzles 8 of the respective nozzle surface 6.
  • FIGS. 3A to 3D and FIGS. 4A to 4D show different arrangements of shutter strips 20 for use in a shrink tunnel according to the present invention.
  • FIGS. 3A to 3D show two complete containers 10, which are transported in parallel via a conveyor belt 11 by two parallel inner spaces 2.
  • the inner shaft wall 3, 5 is shown, ie, each of the two side wall surfaces 9 of the shaft wall 3, 5 is in each case at least partially formed as a nozzle surface 6.
  • At least the lower half of the side wall surface 9 is formed as a nozzle surface 6.
  • FIGS. 4A to 4D each show only a bottle 13 of a container and a part of the outer packaging 14, in particular the upper film tabs 15 and the lower film tabs 16, which limit the so-called film eye 17.
  • the inner shaft wall 3, 5 is shown.
  • shrinking medium 7 is passed into the shaft wall 3, 5 and passed through the nozzles 8 in the nozzle surfaces 6 in the interiors 2.
  • shrinking medium 7 is additionally passed from below through the conveyor belt 11 on the underside of the container in order to ensure a sufficient heat input in this area.
  • FIGS. 4 A to D are formed in about the lower 80% of the side wall surface 9 as a nozzle surface 6.
  • nozzles 8 via which the shrinking medium 7 is introduced into the interior spaces 2, arranged in so-called nozzle rows 8 *.
  • the rows of nozzles 8 * preferably run along and parallel to the transport direction of the containers 10.
  • Each nozzle surface 6 is assigned at least one movable cover strip 20.
  • the cover strips 20 can each be moved in a vertical movement Bv from top to bottom or from bottom to top.
  • the shutter strips 20 can now be moved from top down to the shrinking medium flow 7 of certain nozzle rows 8 * targeted fade.
  • the cover strips 20 are respectively upstream of the nozzle rows 8 *, so that the nozzles 8 of the respective row 8 * are not closed by the cover strips 20. Instead, the flow of the shrinking medium 7 bounces against the cover strip 20 and is thereby deflected downwards or upwards. It is thereby achieved that certain areas of the container 10 can be protected in a targeted manner against the shrinkage medium flow 7, without the thermodynamic operating state in the interior 2 of the shrinking tunnel being influenced.
  • the width B of the cover strip 20 is selected so that preferably two adjacent rows of nozzles 8 * can be dimmed together - see. also FIGS. 5 and 6 , In particular, the width B is greater than twice the distance between two adjacent nozzle rows 8-1 *, 8-2 * and less than three times the distance between two adjacent nozzle rows 8-1 *, 8-2 *. In any case, the width B of the cover strip 20 is significantly smaller than the height H of the nozzle surface 6. In particular, the width B corresponds to a maximum of 30% of the height H of the nozzle surface 6, in particular, the width B is between 5% - 20% of the height H of Nozzle surface 6, preferably between 10% - 18%, preferably at about 15%.
  • FIGS. 3B and 4B show by way of example the positioning of the cover strip 20 in a second working position AP2, in each of which at least the uppermost nozzle row 80 * is dimmed.
  • This is advantageous, for example, to support the upper film tabs 15, so that it is not prematurely pressed by the downward flow direction of the shrinking medium 7 down.
  • a prematurely pressed down film tab 15 prevents sufficient lateral Heat input into the interior of the container 10 via the so-called film eye 17.
  • the heat introduced into the interior of the container 10 is particularly necessary in order to sufficiently heat the outer packaging 14, in particular the shrink film, from inside and thus to achieve a good shrinkage result.
  • FIGS. 3C and 4C show by way of example the positioning of the cover strip 20 in a third working position AP3, in each of which at least one, preferably two, nozzle rows 8 * are dimmed in an upper region of the nozzle surface 6.
  • nozzle rows 8 * are dimmed, which are located at the height of the labels 18 on the bottles 13. This prevents shrinking medium 7 from being inflated directly onto heat-sensitive labels 18.
  • the number of dimmed nozzle rows 8 * depends on the respective width B of the cover strip 20.
  • 3D figures and 4D show by way of example the positioning of the cover strip 20 in a fourth working position AP4 or lower end position, in each of which the lowermost nozzle rows 8 * of the nozzle surface 6 are dimmed. This may be desired to prevent, in particular, a downward flaps of the lower film tab 16.
  • FIGS. 5 and 6 show various views of a nozzle surface 6 of a shaft wall 3 with a height H and a length L 3 and an aperture strip 20 with a width B and a length L 20 corresponding to the length L 3 of the shaft wall 3.
  • the cover strip 20 is associated with the nozzle surface 6 vertically movable, so depending on the respective positioning of the cover strip 20 each different rows of nozzles 8 dimmed *, and thus different areas of the container can be protected.
  • FIG. 7 shows an embodiment of a diagonally disposed cover strip 22.
  • This has approximately the same length as the shaft wall 3.
  • the arrangement of the cover strip 22 can be changed, for example, in which the initial region 24 and the end region 26 are each variable in height, that is height-displaceable by means of a vertical movement Bv (see. FIGS. 7A and 7B ).
  • the cover strip 22 is fixed to a pivot point D, whereby also different diagonal arrangements of the cover strip 22 can be adjusted relative to the nozzle surface 6 of the shaft wall 3.
  • a cover strip 22 is shown in a first arrangement 22 (FIG. 1) and a second arrangement 22 (FIG. 2).
  • FIGS. 8A and 8B each show an embodiment of an inner shaft wall 5, in which each side wall surface 9 or nozzle surface 6 are each associated with three shutter strips 20-1, 20-2 and 20-3.
  • the cover strips 20-1, 20-2 and 20-3 can be moved independently of one another, in particular shifted, and thus be arranged at different heights. With such an arrangement, it is possible to specifically protect one, two or three different regions of the continuous containers (not shown).
  • FIG. 8B For example, an embodiment is shown in which both the area of the upper film tab 15 (see. FIGS. 3B and 4B ), as well as the label area 18 (see. FIGS. 3C and 4C ) and in addition the area of the lower foil flap 16 (cf. 3D figures and 4D ) to be protected.
  • FIG. 9 shows a shrink tunnel 100 with two interiors 2-1 and 2-2, in each of which different products, in particular containers 10a and 10b of different height, are processed.
  • the vertical positioning of the cover strips 20 of the shaft walls 3 is in each case independently adjustable, in particular, the cover strips 20b and 20c of the inner shaft wall 5 are independently adjustable.
  • the cover strips 20a and 20b which are respectively arranged in the first inner space 2-1, arranged in a largely a first height h1, which is adapted to the height of the container 10a, so that in each case the upper film tab of the container 10a is protected
  • the cover strips 20c and 20d which are each arranged in the second inner space 2-2, are arranged in a substantially second height h2, which is adapted to the height of the containers 10b, so that their respective upper film tabs are protected.
  • the cover strips 20a and 20b or 20c and 20d which are each assigned to the same interior 2-1 or 2-2, can be jointly regulated and adjusted.
  • a shrink tunnel 100 with trim strips 20 according to the invention can thus advantageously be used to process parallel packs 10a, 10b from different articles or bottles 13a, 13b.
  • FIGS. 10A to 10D show various arrangements or embodiments of shutter strips 20 on an inner shaft wall.
  • 5 Figure 10A shows a first arrangement, wherein the shutter strips 20 are arranged at a small distance to the nozzle 8 of the nozzle surface 6.
  • the distance between nozzles 8 and cover strip 20 is for example between 1 mm to 3 mm.
  • the distance between the nozzle surfaces 6 and the Blend strips 20 can be varied by a horizontal movement BH. By increasing or decreasing the distance, the flow profile or the flow behavior of the shrinkage medium 7 into the interior 2 can advantageously be changed.
  • FIG. 10C Another option is in FIG. 10C shown.
  • the angle ⁇ in which the cover strip 20 is employed to the side wall surface 9 of the shaft wall 5, can be varied.
  • an advantageous deflection of the flow direction of the bouncing strip 20 rebounding from the shrinking medium 7 is possible.
  • different angle settings ⁇ 1 and ⁇ 2 are shown.
  • Figure 10D shows an aperture strip 20 which has at its upper and lower edge respectively additional upper baffles 28o and lower baffles 28o, whereby also an advantageous deflection of the flow direction of the bouncing strip 20 rebounding shrinking medium 7 is possible.
  • FIG. 11 shows a plan view of a cover strip 20c consisting of a support structure 40 and arranged thereon tiles 50 on a shaft wall 3.
  • the cover strip 20c is arranged parallel to the transport direction TR and the shaft wall 3 upstream, so that from the nozzle 8 a nozzle row 8 * outflowing shrinkage medium (not shown) is dimmed or deflected by the shutter bar 20c.
  • the length L B of the cover strip 20c corresponds approximately to the length L S of the shaft wall 3.
  • the support structure 40 of the cover strip 20c is largely permeable to the shrinkage medium.
  • the support structure 40 is constructed like a comb, in particular the support structure 40 comprises a frame construction 42, which forms the backbone or the comb back, of first frame elements 43, which is arranged parallel to the transport direction TR or parallel to the shaft wall 3.
  • a plurality, but at least three, holding elements 44 are arranged.
  • the retaining elements 44 are, for example, second frame elements 45 arranged perpendicular to the first frame elements 43.
  • Aperture tiles 50 are arranged or fastened between or on the retaining elements 44, 45.
  • the average distance d H between the holding elements 44, 45 corresponds approximately to the length L 50 of the diaphragm tiles 50 parallel to the transport direction TR.
  • the support structure 40 is preferably relatively lightweight.
  • the necessary rigidity is achieved, for example, that the comb back forming frame structure 42 of at least two parallel arranged first frame members 43 with interposed stiffening cross members (not shown). Such a construction simultaneously guarantees the necessary permeability to the shrinking medium.
  • different panel tiles 50 can be arranged on the support structure 40, wherein at least one of the panel tiles 50 as a baffle 50b, 50c or 50d (see FIG. FIGS. 12B-12D ) is trained.
  • An exchange of the individual diaphragm tiles 50 of the cover strip 20c is simpler and more flexible than the replacement of a complete, continuous cover strip (not shown) with a length L B , which corresponds approximately to the length L S of the shaft wall 3.
  • a flexible variation of the shrinkage conditions along the transport path is possible, as described below in connection with FIG. 16 will be explained.
  • Figures 12 show different embodiments of aperture tiles 50 in a lateral view and their arrangement on a shaft wall.
  • 3 Figures 12 schematically represent each a cross section through an inner shaft wall 5, in which both side wall surfaces 9 are partially formed as nozzle surfaces 6 with nozzle rows 8 *.
  • FIGS. 12B to 12E each show aperture tiles 50b to 50e, whose width B corresponds approximately to the distance d between two adjacent nozzle rows 8 *.
  • the aperture tiles 50b, 50c or 50d are also referred to as baffles.
  • the shrinking medium 7 exiting from the nozzle row 8a * arranged behind the cover tile 50b to 50d bounces against the cover tile 50b, 50c or 50d and is subsequently deflected, so that in the region of the cover tile 50b, 50c or 50d no shrinkage medium 7 directly into the interior 2 flows.
  • the aperture tile 50c see FIG. FIG. 12C
  • An upper guide plate 28o with the flow direction of the shrinking medium 7 can be deflected targeted upwards.
  • the aperture tile 50d (see. FIG. 12D ) has an upper baffle 28o and a lower baffle 28u, with the flow direction of a portion of the shrinking medium 7 deflected targeted upwards and another part of the shrinking medium 7 can be selectively deflected downwards.
  • FIGS. 13 and 14 These further embodiments of diaphragm tiles 50 and their influence on the flow direction of the shrinking medium 7 are once again clarified, wherein FIG. 14 a designed as a baffle plate Aperture 50d * is shown, the width of which is approximately twice the distance between two adjacent nozzle rows 8 * corresponds, so that advantageously two nozzle rows 8a * can be dimmed.
  • the upper baffle 28o not only deflects the flow direction of the shrinking medium 7 emerging from the dimmed nozzle row 8a *. Instead, the upper baffle 28o also causes a deflection of the flow direction of the arranged above the non-dimmed nozzle row 8b * outflowing shrink medium 7. This can be used advantageously, for example, to stabilize the upper film tabs 15 an outer packaging 14, in particular a shrink film, and a Fluttering or premature pressing down this upper foil flap 15 to prevent.
  • FIG. 12 shows a side view of an aperture tile 50e, also referred to as a partition tile, which comprises a plurality of openings 52.
  • the shrinking medium 7 emerging from the dimmed nozzle row 8a * strikes the aperture tile 50e and enters the interior space 2 through the multiplicity of openings 52.
  • the flow path of the shrinking medium 7 is thus divided by the aperture tile 50e into finer streams 7A.
  • FIG. 12F to 12H each show aperture tiles 50f, 50g, 50h, whose maximum width B corresponds approximately to three times the distance d between two adjacent nozzle rows 8 *.
  • FIG. 3F 1 shows a first embodiment 50f of a so-called concentrating tile, in which the shrinkage medium 7 flowing out of the three dimmed nozzle rows 8a * is deflected through the panel 50f and concentrated into the interior 2 via an opening 53 of the panel 50f substantially perpendicular to the nozzle surface 6.
  • Figure 12G shows an embodiment 50g of a splitting tile, in which the flow path of the shrinking medium 7 is divided into finer streams 7 A and deflected in desired different directions.
  • Figure 12H shows a further embodiment of a partition tile designated as aperture tile 50h having a plurality of openings 52, wherein each opening in addition to a guide device, in particular a guide plate 28, is assigned.
  • the flow path of the shrinking medium 7 is divided into finer streams 7 A , which all have the same flow direction.
  • the illustrated embodiments of diaphragm tiles 50b to 50h are to be understood as examples only, other suitable forms are also to be encompassed by the invention.
  • FIGS. 15A and 15B each represent a side view of an embodiment of the support structure 40, which allows a quick replacement of the diaphragm tiles 50.
  • hook-shaped retaining elements 44 are arranged at defined intervals, each corresponding approximately to the length L50 of the individual diaphragm tiles 50, in which the aperture tiles 50 arranged interchangeable quickly, in particular can be inserted (see FIG. 15B ).
  • Other embodiments of retaining elements 44, which allow a quick replacement of the aperture tiles 50 may also be used.
  • additional stabilizing elements are provided between the holding elements 44.
  • additional retaining elements 44 are used as stabilizing elements in order to increase the stability of the mounting of the diaphragm tiles 50.
  • FIG. 16 shows an embodiment of an aperture strip 20d with different aperture tiles 50c and 50z.
  • the cover strip 20d comprises a support structure 40 for accommodating up to five cover tiles 50.
  • different cover tiles 50 it is possible to make the shrinkage of the shrinkage medium (not shown) variable in different regions of the shrinkage device in the transport direction TR.
  • a diaphragm tile 50c in accordance with a first initial region I FIG. 3C and FIG. 4 to use to the upper foil flap (see. FIG. 4 ) to support.
  • a middle region II it is possible to provide no diaphragm tiles 50 in order to achieve conventional injection of the shrinkage medium in this middle region II.
  • a third end region III it is possible to analogously apply a concentrated jet of shrinkage medium by means of a cover tile 50f FIG. 3F To steer on the upper film tabs to support the completion of the shrinking process targeted.

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Claims (15)

  1. Dispositif de rétraction (1) pour la rétraction à chaud de film (14) autour d'articles ou de groupements d'articles (10), le dispositif de rétraction (1) comprenant au moins un espace intérieur (2) ayant une section de transport (11) pour les articles ou groupements d'articles (10) ainsi qu'au moins un moyen (30) d'amenée d'un milieu de rétraction (7) à un espace intérieur (2) du dispositif de rétraction (1), le dispositif de rétraction (1) présentant au moins une paroi de puits (3) d'une première longueur (LS) avec au moins une surface à buses (6) tournée vers ledit espace intérieur (2) du dispositif de rétraction (1) et ayant une pluralité de buses (8) dirigées vers les articles ou groupements d'articles (10), lesdites buses (8) étant disposées en rangées de buses (8*) et le milieu de rétraction (7) pouvant être mené par les buses (8) suivant une direction d'écoulement dans l'espace intérieur (2*) du dispositif de rétraction (1), caractérisé par le fait qu'à ladite au moins une surface à buses (6) de la paroi de puits (3) est associée au moins une baguette d'obturation (20) mobile d'une deuxième longueur (LB) qui correspond dans une large mesure à la première longueur (LS) de la paroi de puits (3), ladite baguette d'obturation (20) étant associée, dans une première position de travail (AP1), dans une large mesure à un bord supérieur de ladite paroi de puits (3), et ladite baguette d'obturation (20) pouvant être placée par un mouvement vertical (BV) dans au moins une deuxième position de travail (AP2), la baguette d'obturation (20) étant située, dans ladite au moins une deuxième position de travail (AP2), devant au moins une rangée de buses (8*) et étant espacée de celle-ci de sorte que la direction d'écoulement du milieu de rétraction (7) s'écoulant dans ledit espace intérieur (2) du dispositif de rétraction (1) est déviée au moins dans une zone partielle de la deuxième longueur (LB) de ladite baguette d'obturation (20) et qu'au niveau de ladite au moins une baguette d'obturation (20), au moins dans la zone partielle, aucun milieu de rétraction (7) ne rencontre directement les articles ou groupements d'articles (10), le milieu de rétraction (7) pouvant être introduit, dans ladite au moins une zone partielle, au-dessus et / ou au-dessous de la baguette d'obturation (20) dans ledit espace intérieur (2) du dispositif de rétraction (1).
  2. Dispositif de rétraction (1) selon la revendication 1, dans lequel le dispositif de rétraction comprend des moyens de positionnement vertical par l'intermédiaire desquels la position verticale de ladite au moins une baguette d'obturation (20) peut être réglée de manière automatisée et / ou commandée et / ou manuelle.
  3. Dispositif de rétraction (1) selon l'une quelconque des revendications précédentes, dans lequel le dispositif de rétraction (1) comprend des moyens de réglage angulaire par l'intermédiaire desquels peut être réglé l'angle (α) de ladite au moins une baguette d'obturation (20) par rapport à la surface à buses (6).
  4. Dispositif de rétraction (1) selon l'une quelconque des revendications précédentes, dans lequel la baguette d'obturation (20) présente une largeur (B) perpendiculaire à la deuxième longueur (LB) de la baguette d'obturation (20) et dans une large mesure perpendiculaire à la direction de transport, la largeur (B) étant supérieure ou égale à la distance moyenne de deux rangées de buses (8*) voisines, plus une fois le diamètre de buse.
  5. Dispositif de rétraction (1) selon la revendication 4, dans lequel la largeur (B) de la baguette d'obturation (20) est inférieure ou égale à deux fois la distance moyenne de deux rangées de buses (8*) voisines, plus une fois le diamètre de buse, ou dans lequel la largeur (B) de la baguette d'obturation (20) est inférieure ou égale à trois fois la distance moyenne de deux rangées de buses (8*) voisines, plus une fois le diamètre de buse.
  6. Dispositif de rétraction (1) selon l'une quelconque des revendications précédentes, dans lequel le dispositif de rétraction (1) comprend des moyens de positionnement horizontal par l'intermédiaire desquels la distance entre ladite au moins une baguette d'obturation (20) et ladite surface à buses (6) peut être réglée de manière manuelle, automatisée et / ou commandée.
  7. Dispositif de rétraction (1) selon l'une quelconque des revendications précédentes, dans lequel à ladite au moins une surface à buses (6) de la paroi de puits (3) sont associées au moins deux baguettes d'obturation (20) mobiles, dans lequel la position verticale desdites au moins deux baguettes d'obturation (20) peut être réglée indépendamment l'une de l'autre et / ou dans lequel les angles (α) desdites au moins deux baguettes d'obturation (20) par rapport à la surface à buses (6) peuvent être réglés indépendamment l'un de l'autre et / ou dans lequel le dispositif de rétraction (1) comprend des moyens de positionnement horizontal par l'intermédiaire desquels la distance entre lesdites au moins deux baguettes d'obturation (20) et la surface à buses (6) peut être réglée respectivement indépendamment l'une de l'autre.
  8. Dispositif de rétraction (1) selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une baguette d'obturation (20) comprend une construction support (40) avec au moins deux carreaux d'obturation (50) disposés sur la construction support (40) ou avec au moins deux unités de position pour la disposition de carreaux d'obturation (50) sur la construction support (40).
  9. Dispositif de rétraction (1) selon la revendication 8, dans lequel ladite construction support (40) présente une deuxième longueur (LT) qui correspond à peu près à la première longueur (LS) de la paroi de puits (3) et dans lequel la construction support (40) est réalisée en tant que construction de cadre (42) de type peigne, avec au moins un premier élément de cadre (42) formant le dos de peigne et ayant une deuxième longueur (LR) qui correspond à peu près à la première longueur (LS) de la paroi de puits (3), et avec des éléments de maintien (44) disposés sur le premier élément de cadre (42) et formant les dents de peigne, respectivement un carreau d'obturation (50) pouvant être disposé entre ou sur respectivement deux éléments de maintien (44).
  10. Dispositif de rétraction (1) selon l'une quelconque des revendications 8 ou 9, dans lequel au moins deux carreaux d'obturation (50) sont disposés de manière successive suivant la direction de transport (TR) sur ladite construction support (40), les carreaux d'obturation (50) présentant chacun une troisième longueur (LK) dans la direction de transport (TR) et la somme des troisièmes longueurs (LK) des carreaux d'obturation (50) disposés sur la construction support (40) étant inférieure ou égale à la deuxième longueur de la construction support (40) ou bien inférieure ou égale à la première longueur (LS) de la paroi de puits (3).
  11. Dispositif de rétraction (1) selon l'une quelconque des revendications 8 à 10, dans lequel au moins deux carreaux d'obturation (50) réalisés de manière différente sont disposés sur la construction support (40).
  12. Dispositif de rétraction (1) selon la revendication 11, dans lequel un premier nombre n de carreaux d'obturation (50) est disposé sur une construction support, au moins l'un des carreaux d'obturation et au maximum n-1 carreaux d'obturation (50) comprenant des moyens (53) de concentration, de division et / ou d'orientation du courant du milieu de rétraction (7).
  13. Dispositif de rétraction (1) selon l'une quelconque des revendications 8 à 12, dans lequel les carreaux d'obturation (50) sont disposés et / ou fixés de manière échangeable sur ladite construction support (40), dans lequel, en particulier, la construction support (40) comprend des unités de réception pour les carreaux d'obturation (50), les carreaux d'obturation (50) étant fixés de manière amovible, par lesdites unités de réception, sur la construction support (40).
  14. Dispositif de rétraction (1) selon l'une quelconque des revendications 8 à 13, dans lequel les carreaux d'obturation (50) sont fixés de manière mobile sur la construction support (40) et / ou dans lequel l'angle des carreaux d'obturation (50) par rapport à la construction support (40) peut être réglé individuellement.
  15. Procédé de rétraction à chaud de film (14) autour d'articles ou de groupements d'articles (10) dans un dispositif de rétraction (1) qui comprend au moins un espace intérieur (2) ayant une section de transport (11) pour les articles ou groupements d'articles (10) ainsi qu'au moins un moyen (30) d'amenée d'un milieu de rétraction (7) à un espace intérieur (2) du dispositif de rétraction (1), ledit espace intérieur (2) présentant au moins une paroi de puits (3) d'une première longueur (LS) et avec au moins une surface à buses (6) tournée vers ledit espace intérieur (2) et ayant une pluralité de buses (8) dirigées vers les articles ou groupements d'articles (10), lesdites buses (8) étant disposées en rangées de buses (8*) et le milieu de rétraction (7) étant mené par les buses (8) dans l'espace intérieur (2*) du dispositif de rétraction (1), caractérisé par le fait qu'au moins une rangée de buses (8*) individuelle de ladite au moins une surface à buses (6) de la paroi de puits (3) peut être masquée au moins par zones de sorte que le milieu de rétraction (7) s'écoulant depuis les buses (8) de la rangée de buses (8*) masquée au moins par zones, dans l'espace intérieur (2) du dispositif de rétraction (1) est dévié, dans la zone partielle de la rangée de buses (8*) masquée, en un courant dirigé vers le haut et / ou vers le bas et ne rencontre pas directement les articles ou groupements d'articles (10) dans cette zone partielle, ladite au moins une rangée de buses (8*) étant masquée en positionnant au moins une baguette d'obturation (20) verticalement mobile située devant la surface à buses (6), dont la deuxième longueur (LB) correspond dans une large mesure à la première longueur (LS) de la paroi de puits (3), à une telle distance devant la rangée de buses (8*) respective que le milieu de rétraction est introduit, dans ladite au moins une zone partielle, au-dessus et / ou au-dessous de la baguette d'obturation dans ledit espace intérieur du dispositif de rétraction.
EP13163312.5A 2012-04-18 2013-04-11 Dispositif de rétractation avec baguette d'obturation Active EP2653394B1 (fr)

Applications Claiming Priority (2)

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DE102012103402.8A DE102012103402B4 (de) 2012-04-18 2012-04-18 Blendenleiste für Schrumpfvorrichtung
DE102012103398.6A DE102012103398B4 (de) 2012-04-18 2012-04-18 Schrumpfvorrichtung mit Blendenleiste

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EP2653394B1 true EP2653394B1 (fr) 2015-03-04

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DE102021103837A1 (de) 2021-02-18 2022-08-18 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zum Optimieren des Energieaustrags einer Schrumpfvorrichtung

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DE202015107021U1 (de) * 2015-12-22 2017-03-24 Msk - Verpackungs-Systeme Gmbh Schrumpfrahmen mit wenigstens einem an ein Gebläse anschließbaren Lufteinlass zum Zuführen von Blasluft
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DE102019110645A1 (de) * 2019-04-25 2020-10-29 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zum Anpassen einer Schrumpfvorrichtung
DE102021103598A1 (de) * 2021-02-16 2022-08-18 Krones Aktiengesellschaft Schrumpfvorrichtung, Verfahren zum Optimieren des Aufschrumpfens eines Verpackungsmaterials auf eine Zusammenstellung umfassend mindestens einen Artikel und Schrumpfmittelmodul

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DE102021103837A1 (de) 2021-02-18 2022-08-18 Krones Aktiengesellschaft Schrumpfvorrichtung und Verfahren zum Optimieren des Energieaustrags einer Schrumpfvorrichtung

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