EP1510460B1 - Verfahren und Vorrichtung zum versiegelten Umverpacken einer Ladung mit einer Schlauchfolie aus dehnbarem Kunststoffmaterial - Google Patents

Verfahren und Vorrichtung zum versiegelten Umverpacken einer Ladung mit einer Schlauchfolie aus dehnbarem Kunststoffmaterial Download PDF

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Publication number
EP1510460B1
EP1510460B1 EP04103938A EP04103938A EP1510460B1 EP 1510460 B1 EP1510460 B1 EP 1510460B1 EP 04103938 A EP04103938 A EP 04103938A EP 04103938 A EP04103938 A EP 04103938A EP 1510460 B1 EP1510460 B1 EP 1510460B1
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EP
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Prior art keywords
film
overwrapping
bag
frame
load
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EP04103938A
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English (en)
French (fr)
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EP1510460A1 (de
Inventor
Franco Tacchini
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Officina Meccanica Sestese SpA
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Officina Meccanica Sestese SpA
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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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads

Definitions

  • the present invention relates to a process and to an apparatus for the sealed overwrapping of a pallet-stacked load by means of a film of stretchable plastic material having a tubular shape.
  • a pallet-stacked load is brought in a wrapping position in the middle of a main support structure of a wrapping apparatus.
  • a plastic wrapping film having a tubular shape but folded longitudinally on a plane to be wound onto a feeding roll, is guided from a position at the bottom of said main support structure to a position above the top of the pallet load.
  • Such film is then guided downwards and at the same time opened at the bottom end thereof, so as to form a sort of upturned bag.
  • Such bag is first of all removed from the feeding roll performing a horizontal cut and simultaneous thermal welding along the top end edge.
  • Such upturned bag is then force-fitted onto and around the pallet load, until it is completely wrapped around the load.
  • the final wrapping step consists in the shrink-welding of the bag on the load, which occurs subjecting the wrapping film to shrinking by heat.
  • the bag force-fitting step is preceded by a step of temporary stretching and widening of the bag itself, so that the wrapping final step consists in the release of the bag which, due to elastic action, returns into its initial condition and hence automatically shrinks around the load.
  • the present invention relates indeed to an overwrapping apparatus of this kind, that is one which employs a film of stretchable plastic material.
  • Italian patent IT-1.074.012 in the name of ANVAR (corresponding to patent FR-2.316.127 filed on 4.7.1975), describes a wrapping apparatus in which means are provided to feed the tubular film above the load, and gripping means which grip the wrapping bag at the four corners thereof, open it and drag it downwards over the bottom of the pallet along four substantially vertical tracks.
  • each of such tracks has a first vertical portion, which extends in height exclusively over the pallet load and which defines a plan perimeter corresponding to the bag largest unstretched size, a second vertical portion, which extends over the entire height of the pallet load and which covers a plan perimeter of a size larger than the size of the load itself, as well as a third oblique portion, which joins the bottom end of the first portion, which is the innermost and narrowest one, and the top end of the second portion, which is the outermost and widest one.
  • said third portion of the four tracks forms a path defining a plan perimeter becoming gradually wider in the bottom portion thereof; such path hence forms an oblique widening portion, along which a temporary widening of the bag is produced, due to the elastic stretching in a crosswise direction.
  • the bag thus widened, following the second portion of the tracks, is then force-fitted on the load and on the pallet. Once finished, the gripping means are released, to let the bag elastically resume its original condition and shrink on the load.
  • said support framework is horizontally widened, both longitudinally and transversally, so as to bring the four pin supports, with the ruffled bag thereon, to define a perimeter having a larger plan size than the load plan size.
  • said framework with the four pin supports is made to vertically slide downwards to the bottom of the pallet, while the bag is progressively released from the same pin supports and force fitted onto the load; in this third step the stretched film freely returns into its initial condition, shrinking on the load.
  • Wrapping apparatuses of this type i.e. equipped with means to ruffle the bag in a first step, then to stretch it horizontally in a second step, and finally to spread it out in a third step while simultaneously applying it to the load, are also known from patents DE-39 08 957 dated 18.3.1989, EP-0.344.815 and EP-0.445.443, both filed on 5.6.1989, EP-0.798.214 filed on 27.3.1997, EP-1.072.514 filed on 21.7.2000, all in the name of BERNHARD BEUMER MASCHINENFABRIK, as well as from patent DE-43 27 450 in the name of MOELLERS, which are all based on the same operation mode and differ from each other essentially through construction details.
  • a) - the film of the wrapping bag remains stretched only in a horizontal direction (i.e. transversally to the vertical axis of the upturned bag): in fact, when the pin supports, or similar, onto which the tubular film is ruffled, are mutually spaced apart, they cause a horizontal stretching of the film; when such supports are shifted vertically, to force-fit the film on the load, said film is simply released from said supports, without any vertical stretching;
  • the film is guided only in correspondence of the four corners of the adjustable widening frame, so that said film tends, due to its elasticity and to the remarkable stretching it was subject to, to take up an arched shape along its edges, thereby affecting the release conditions on the load;
  • the wrapping apparatus must be much higher than the load: the tubular film is in fact fed from a roll housed in the proximity of the bottom of the apparatus, upwards and over the load, then it is deviated downwards, on the load, hence the tubular film is stretched open and guided on the pin supports to the four corners of the adjustable widening frame; that necessarily implies that the apparatus be at least as tall as the space necessary to guide and stretch open the tubular film over the top height provided for the load.
  • fig. 1 is an elevated and partially sectioned diagrammatic view of the wrapping apparatus according to the invention, in the collection position of the tubular film on the adjustable widening frame, to form a ruffled bag;
  • fig. 2 is a view similar to that of fig. 1, but in the position of initial displacement of the tubular film from the adjustable widening frame to the load;
  • fig. 3 is a plan and partly sectioned diagrammatic view of the same apparatus of fig. 2;
  • fig. 4 is an enlarged view of the selection and collection station of different types of tubular film to feed, shown by arrow S1 in figures 1 and 2;
  • fig. 5 is an enlarged view of the transfer carriage mounting the adjustable widening frame, in the initial position of the step of tubular film application on the load;
  • figs. 6 and 7 are elevated and partly sectioned plan views, respectively, in an even more enlarged scale, of the tubular film-collecting and film-ruffling assembly on the adjustable widening frame of the transfer carriage, shown by arrow R in figure 5;
  • figs. 8 and 9 are views similar to those of figs. 6 and 7, showing an embodiment of the tubular film-collecting and film-ruffling assembly.
  • figs. 10a to 10c show in a very diagrammatic way an embodiment of the tubular film welding and cutting assembly at the bottom end thereof, equipped with cooling means of the welding.
  • the wrapping apparatus comprises a single main support structure, formed by four posts 1 (marked 1a, 1b, 1c, and 1d in fig. 3), held by crossmembers 2 and 3 at top and bottom.
  • Said main support structure is located beside the transport line T (diagrammatically represented by a simple box in fig. 1, since it is a known device, not being part of the present invention) on which the load C, generally a pallet-stacked load to be packaged, moves (in a direction perpendicular to the plane of the drawing sheet).
  • feeding of the tubular film and collection thereof on the adjustable widening frame occur in correspondence of the main support structure 1,2,3, whereas distribution and application of the tubular film on the load, to form the corresponding packaging, occurs outside the main support structure, in correspondence of the transport line T.
  • the transport line T for this purpose there are mainly provided:
  • the selection and collection station S1 is represented in a diagram in fig. 1 and in greater detail in fig. 4.
  • Said station comprises multiple supports - three supports in the case illustrated - for an equal number of rolls B1, B2, B3 feeding the tubular film P1, P2 P3.
  • the tubular film, to be wound onto rolls is folded on a plane, that is so as to form two parallel, main plane sides, joined to two sides folded concertina-like; the cross section of this configuration, which is well known, is the one represented in fig. 3, diagrammatically represented by phantom lines and marked by reference P.
  • Each of said feeding and opening assemblies has a structure known per se, which is not part of the present invention, and which will therefore not be described in further detail.
  • a cutting and welding assembly (not better shown, since it is known per se and in any case it is not part of the present invention); such device is in any case diagrammatically represented in fig. 4, and comprises a pair of fixed crossmembers 7, along which cutting and welding means shift.
  • Such means comprise, more accurately, two welding presser 7a and cutting blade 7b assemblies, operated in opposite directions by two corresponding jacks 7c.
  • the two jacks 7c are capable of bringing the respective pressers 7a in mutual contact along the middle line Y ⁇ Y (see fig. 3) to perform the welding, and then blades 7b to cooperate in cutting the tubular film along the same line.
  • each of the two welding presser 7a and cutting blade 7b assemblies comprises a cooling presser 7e; said cooling presser is, as is evident from the drawing, a preferably square tubular bar in which air or possibly cooling liquid is made to flow.
  • first pressers 7a are brought into mutual tight contact and grip between each other the double sheet of wrapping film to perform the thermal welding.
  • the cutting blades 7b are made to advance; which blades separate the film portion which has already formed the upward open bag using P3 which is fed from the corresponding roll.
  • cooling pressers 7e upon closure of pressers 7a and of blades 7b, cooling pressers 7e are also closed (Fig. 10b); their mutual contact and clamping of the film, in a position above the welding point - as shown in fig. 10b - offers a first advantage and precisely that the welding heat does not diffuse upwards, along the film, but remains concentrated in the clamping position of the pressers 7a, allowing a more accurate welding.
  • pressers 7e Upon opening of pressers 7a and of blades 7b, pressers 7e also temporarily open to allow a brief upward sliding of the film; as soon as the welding line arrives in correspondence of the pressers 7e (fig. 10c), said pressers tighten again and clamp the welding, cooling it.
  • a second advantage is thereby obtained, i.e. that the welding, well cooled before being subjected to stretching, is much more stable and not at risk of yielding and opening during the subsequent steps of stretching and application of the bag onto the load to be wrapped.
  • the transport system S2 for feeding and guiding the film comprises (see also fig. 3 in the left portion of the drawing) a beam carriage 8, vertically sliding along posts 1a and 1b under the control of a motor drive 8a.
  • a beam carriage 8a On such carriage are mounted cantilevered two arms 9a and 9b, which can be shifted along the beam carriage 8, in a specularly symmetrical way to the middle transversal axis X-X, through respective motor drives 10.
  • On each of said two arms 9a and 9b are mounted pairs of grippers 11,12, which are in turn mounted sliding along such arms in a specularly symmetrical way to the longitudinal middle axis Y-Y of the main support structure 1.
  • grippers 11, 12 of each pair of grippers of the tubular film P are moved closer together, at the centre of arm 9a, 9b, but are open to receive the edges Pa, Pb of the tubular film itself; said edges correspond to the upper open edge of the film carried by the opening device 6c which at that time is in correspondence of grippers 11, 12.
  • grippers 11, 12 Once grippers 11, 12 have gripped edges Pa, Pb, carriage 8, 9a, 9b moves upwards dragging the tubular film therewith, which unrolls from the respective feeding roll. Simultaneously to this upward movement, grippers 11, 12 of each of the arms 9a, 9b are moved apart from each other (see intermediate position in fig. 1), opening the tubular film from the initial situation, marked by P and with phantom lines in fig. 3, up to the final situation, marked by P' and with phantom lines in the same figure 3.
  • the adjustable widening frame 13 is mounted on carriage 14 and is capable of becoming wider or narrower than carriage 14 itself.
  • Said carriage is capable of shifting horizontally, in a crosswise direction to the movement direction of load C, along a guiding system formed on each of the two support plates 15; carriage 14 is further capable of shifting vertically, together with said two plates 15, which are capable of shifting along a guiding system formed on the pair of posts 1c and 1d.
  • the adjustable widening frame 13 is capable of shifting both in a crosswise direction X-X and in a longitudinal direction Y-Y, to become wider or narrower;
  • carriage 14 shifts in a crosswise direction X-X, i.e. parallel to the plane of the sheet of fig. 3, from a position (on the left hand side in the drawing of fig. 1) collecting the tubular film to a position (on the right hand side in the drawing of fig. 2) applying the tubular film on the load, and
  • the pair of plates 15 shifts only in a vertical direction Z-Z, to vertically transport both carriage 14 and the adjustable widening frame.
  • the two plates 15 are mounted vertically sliding along posts 1c and 1d, respectively, of the main support structure, i.e. the two posts which are on the side of the load transporter T.
  • said plates are mutually linked by crossmembers 15a, meant to form a rigid cage therewith; such crossmembers 15a, however, do not obstruct the free transversal movement of carriage 14.
  • the vertical movement of cage 15, 15a is guaranteed by a guiding system integral with posts 1c, 1d, diagrammatically represented by rollers 15b and not better shown since already known and in any case not being part per se of the present invention.
  • Each collection assembly is mounted on an own saddle 23a, 24a, 25a, and 26a; such saddles are mounted sliding in pairs on crossmembers 19 and 20, in a way specularly symmetrical to the middle axis X-X.
  • Such movement occurs under the control of two respective motors 27 and 28, each driven in perfect parallelism in correspondence of the respective crossmember 19 or 20 thereof, and by two respective drive chains, also mounted in the manner described for chains 22;
  • Such rods are preferably tubular, having a circular section, for the purpose better described in the following.
  • a particularly interesting advantage of the adjustable widening frame arrangement just described - with respect of the prior art of DE-39 08 957 which, for the widening of frame 13, provide two jacks arranged according to the frame diagonals - is the following: by driving the common motor 21 in a way independent from the actuation of the pair of motors 27, 28, it is possible to vary the shape and size of frame 13, i.e. it is possible to vary within wide margins the ratio between the length of a pair of opposite sides of frame 13 and the length of the other pair of sides. In other words, it is possible to adjust the shape of frame 13 to the shape of the pallet load to be wrapped, i.e. to give frame 13 a rectangular shape with the longer axis according to Y1-Y1 (as shown), or a square shape, or a rectangular shape with the longer axis according to X-X.
  • This adjustment of the shape of frame 13 preferably occurs before ruffling of the wrapping bag, so that, in the subsequent widening step, it is possible to control the lengthening of the sides of frame 13 so as to cause a stretching of the stretchable film of the bag, in an even way on all four sides.
  • telescopic rods 29 automatically follow the varying shape of frame 13 or the size ratio of the sides thereof, since the ends of said rods are joined directly to the four collection and ruffling assemblies.
  • the function of such telescopic rods is essential, not so much in order to establish a structural connection among the four collection and ruffling assemblies at the four corners of the frame, as to physically set up the sides of the adjustable widening frame;
  • such telescopic rods - having a tubular shape with a circular section - are in fact capable of offering a rounded surface, onto which the wrapping film can glide and be guided during the step of turning inside-out and release onto the load to be wrapped. The film is hence guided on a rounded surface which extends over the entire contour of the adjustable widening frame.
  • FIG. 6 and 7 a first embodiment of one of said collection assemblies 23, 24, 25, 26 is shown in greater detail, as said, onto which tubular film P ruffles; in the following only assembly 25 is described, the other assemblies being identical thereto.
  • Said group 25 (like each of the other three assemblies, in a symmetrical way) comprises a pair of motor-driven wheels 30, mounted on mutually perpendicular axes 31.
  • wheels 30 have such a periphery profile, and are positioned one in respect to the other so that their contour arrives substantially in mutual contact at a point TR representing in practice the gripping point of film P, and the dragging point, as is better described in the following.
  • a third wheel 32 is found, mounted freely rotating on a pin 32a, carried by a support triangle 33; the plane of wheel 32 is substantially oriented according to the vertical plane of the bisectrix of the angle formed by the collection assembly 25.
  • Triangle 33 can perform a short oscillation run within said bisectrix plane, which run is controlled by jack 34. Thanks to this way of mounting, wheel 32 goes from a rest position, in which it is at a short distance from the contour of the pair of wheels 30, to a work position in which it is in close contact with said contour of wheels 30 (s.
  • the arrangement is virtually inverted, at least as far as the motor drive is concerned, which is not on a pair of wheels within the adjustable widening frame (as in the case of wheels 32), but on outer wheel 40. Furthermore, within the frame the film rests - not so much on wheels 32 and on the subsequent ruffling angular post 36 - but directly on the profile of angular post 42 which, in correspondence of the resting area TR of wheel 40, is formed by a sliding block 41 made of a material having a low friction coefficient, in particular a sliding block made of Teflon® .
  • first of all the operator provides to arrange the rolls of tubular film on the respective supports B1, B2, B3, to insert each film in the respective unwinding path P1, P2 and P3 up to transmission rollers 4a, 4b and 4c, and finally to engage the open upper side thereof with opening devices 6a, 6b and 6c, respectively.
  • the automatic control system of the apparatus (or the operator himself in less automated apparatuses) provides to bring opening device 6a, or 6b, or 6c - according to the type of wrapping film required - in correspondence of the pair of grippers 11, 12 of the gripping carriage 8.
  • carriage 8 shifts upwards and grippers 11, 12 simultaneously depart from each other to open the tubular film in the way illustrated on the left hand side of figs. 1 and 3 (phantom profile P').
  • the movement of the tubular film P continues upwards as long as the free upper edge thereof is force-fitted over the four wheels 35 (fig. 6, 7) - or over sliding blocks 41 (fig. 8, 9), respectively - of collection assemblies 23, 24, 25, 26, and in the space between meeting point TR of wheels 30 with the opposite pressure wheel 32, or of wheel 40 with sliding block 41, the pressure wheel being kept apart, in this step, in its rest position.
  • jack 34 is operated to bring wheel 32 in close contact with wheels 30 (or wheel 40 against sliding block 41), and hence lock the open upper end of the film bag on the adjustable widening frame 13.
  • said welding and cutting line remains facing downwards, as diagrammatically shown by the welding footstalk PP shown in the middle lower part PI of film P, which closes below the adjustable widening frame, as diagrammatically shown in figure 5.
  • Such welding and cutting operation can be performed immediately after having locked the open upper end of the bag between wheels 30, 32 - as mentioned - or even shortly after the start of rotation of wheels 30, 32, with a delay depending on the desired length of the wrapping bag: such length may in fact, at least in certain cases, exceed the measure comprised between the lower end stop and the upper end stop of carriage 8, 9.
  • shifting of transfer carriage 14 is performed from the main support structure area 1, 2 (wherein station S1 selecting the tubular film and system S2 transporting and forming the ruffled bag are arranged), shown on the left hand side of fig. 1, to the area of the pallet transporter T (wherein the application station of the tubular film on the load is located), shown on the right hand side of fig. 2.
  • This step consists exclusively in the shifting of carriage 14, together with adjustable widening frame 13, along the guide defined by rollers 16, in a crosswise direction, i.e. parallel to the axes X-X of the apparatus.
  • the work step just described at point E) is associated with the widening step of frame 13.
  • film P has ruffled on the four collection assemblies 23, 24, 25 and 26, such assemblies are mutually spaced apart, moving them in the directions shown by arrows F in fig. 3.
  • film P is elastically stretched until it assumes a shape (such as the one shown by the phantom line on the right hand side of fig. 3) which, seen in plant, corresponds to a larger quadrilateral than the quadrilateral corresponding to load C.
  • Such opening step of the adjustable widening frame can be performed immediately before the crosswise shift of carriage 14 or also simultaneously therewith, or also immediately after such shift, i.e. when carriage 14 is already above transporter T.
  • carriage 14 first of all brings the lower plane part PI of film P into contact and resting on the top of the load. Therefore, according to a fundamental feature of the present invention, as carriage 14 travels down, the walls of the bag which free themselves from the ruffling area 36, 42, change from a position on the outside of each edge of section bar 36 (or 42), above wheels 30, which now rotate in an opposite direction to F', hence above respective wheel 35 - or above sliding block 41 - to a position on the inside of adjustable widening frame 13, after having passed over telescopic rods 29 and wheel 35 (or sliding block 41), on the inner side thereof, until said walls adhere to load C.
  • the film bag turns inside out as it adheres to load C.
  • the apparatus according to the invention can be manufactured, in its structure comprising posts 1 and transfer carriage 14, as a unit assembly separated from the load transport system T, so that it becomes possible, thanks to this circumstance and to the moderate height of said structure, to manufacture said assembly as an entirely prefabricated unit and then displacing it to the mounting site. That avoids having to build, mount and test the apparatus in the workshop, then taking it apart, at least partly, to move it to the site of use and there reassemble it and retest it for operation, as occurs for prior art apparatuses.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Making Paper Articles (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Transplanting Machines (AREA)

Claims (33)

  1. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C), bei dem eine Verpackungsfolie (P) aus dehnbarem Material schlauchförmig von einer Zuführungsrolle (B1, B2, B3) abgegeben wird, dann ein Abschnitt der Schlauchfolie von dieser Rolle getrennt und durch Thermoschweißen (7) an einem seiner Enden geschlossen wird, um einen Beutel auszubilden, der am gegenüberliegenden Ende offen ist, wobei der Beutel von diesem Ende auf einen verstellbaren Erweiterungsrahmen (13) gekräuselt wird, wobei dieser Rahmen schließlich weit geöffnet wird, so dass eine quergerichtete elastische Dehnung der Schlauchfolie bewirkt wird, und schließlich entlang der Ladung (C) nach unten bewegt wird, um den Folienbeutel auf der Ladung selbst abzulegen, dadurch gekennzeichnet, dass
    - der Schlauchfolienabschnitt nach oben geführt wird, an seinem unteren Ende (7) thermogeschweißt wird, um einen Beutel mit einer bestimmten Größe mit einer nach oben gerichteten Öffnung auszubilden, von der Zuführungsrolle getrennt und an dem oberen offenen Ende auf dem verstellbaren Erweiterungsrahmen (13) befestigt wird, und der Beutel aufgenommen und auf den verstellbaren Erweiterungsrahmen mit einer nach oben gerichteten Bewegung gekräuselt (TR) wird,
    - der Rahmen (13) weit geöffnet wird, wodurch der gekräuselte Beutel in horizontaler Richtung gedehnt wird,
    - die Schlauchfolie umgekrempelt und während des Abgebens und Anhaftens an der Ladung mit nach unten gerichteter Bewegung angehalten wird, so dass sie in vertikaler Richtung gedehnt wird, während sie entlang des ganzen Umfangs des verstellbaren Erweiterungsrahmens bewegt und geführt wird.
  2. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C) nach Anspruch 1, dadurch gekennzeichnet, dass das Vorbereiten des gekräuselten Beutels, welches folgende Schritte umfasst:
    Zuführen der Folie (P) mit nach oben gerichteter Bewegung, Trennen der Folie von ihrer Zuführungsrolle, Thermoschweißen ihrer unteren Kante und Aufnehmen und Kräuseln des Beutels auf den verstellbaren Erweiterungsrahmen (13),
    in einem Arbeitsbereich (1, 2, 3) neben dem Bereich (T) ausgeführt wird, in dem die umzuverpackenden Paletten transportiert werden.
  3. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C) nach Anspruch 1 und 2, dadurch gekennzeichnet, dass es das Verschieben des verstellbaren Erweiterungsrahmens (13) mit einer horizontalen Verschiebung aus der Position, in der das Vorbereiten des gekräuselten Beutels erfolgt, in eine Position oberhalb der umzuverpackenden Palette (C) umfasst, und dass das weite Öffnen des verstellbaren Erweiterungsrahmens (13) zum elastischen Dehnen des gekräuselten Beutels in einer horizontalen Richtung während dieses Verschiebens erfolgt.
  4. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C) nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass die Schlauchfolie (P) angehalten wird, während sie über der Ladung abgegeben wird, um auch ihre vertikale Dehnung zu bewirken.
  5. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C) nach Anspruch 1, dadurch gekennzeichnet, dass dem Vorbereiten des gekräuselten Beutels,
    das das Zuführen der Folie (P) nach oben, das Trennen der Folie von ihrer Zuführungsrolle (B1, B2, B3), das Thermoschweißen ihrer unteren Kante und das Aufnehmen und Kräuseln des Beutels auf dem verstellbaren Erweiterungsrahmen enthält,
    das Bestimmen der anfänglichen Form und Größe des verstellbaren Erweiterungsrahmens (13) vorausgeht.
  6. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen (C) nach Anspruch 5, dadurch gekennzeichnet, dass das Bestimmen der Form des verstellbaren Erweiterungsrahmens durch Längen oder Kürzen eines Paares gegenüberliegender Rahmenseiten (29) unabhängig von der Längen oder Kürzen des anderen Paares gegenüberliegender Seiten (29) des Rahmens erhalten wird.
  7. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass das Verhältnis zwischen der Länge eines Paares gegenüberliegender Rahmenseiten (29) und der Länge des anderen Paares gegenüberliegender Seiten (29), das beim Bestimmen der Form des verstellbaren Erweiterungsrahmens (13) ermittelt wurde, während des weiten Öffnens des Rahmens unverändert gehalten wird.
  8. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen nach Anspruch 1, dadurch gekennzeichnet, dass dem Vorbereiten des gekräuselten Beutels, das das Zuführen der Folie mit einer nach oben gerichteten Bewegung, das Trennen der Folie von ihrer Zuführungsrolle, das Thermoschweißen ihrer unteren Kante und das Aufnehmen und Kräuseln des Beutels auf dem verstellbaren Erweiterungsrahmen enthält, das Einstellen der Größe der Schlauchfolie (P1, P2 oder P3) zum Ausbilden des Verpcckungsbeutels vorausgeht.
  9. Verfahren zum Umverpacken auf einer Palette gestapelter Ladungen nach Anspruch 1 oder einem der Ansprüche 1, 5 und 8, dadurch gekennzeichnet, dass die Thermoschweißnaht der unteren Kante des Verpackungsbeutels vor dem Dehnen gekühlt wird.
  10. Vorrichtung zum Umverpacken auf einer Palette gestapelter Ladung, die Folgendes umfasst: einen starren Hauptträgerrahmen (1, 2, 3), Mittel (S1; B1, B2, B3) zum Zuführen einer Verpackungsfolie (P1, P2, P3) aus dehnbarem Schlauchmaterial, Mittel (7, 7b) zum Schneiden eines Abschnitts der Schlauchfolie und Mittel (7, 7a) zum Thermoschweißen ihrer ersten Kante, um den Folienabschnitt zu einem Beutel zu formen, Mittel (11, 12) zum Öffnen der beutelförmigen Folie (P) entlang ihrer anderen Kante und zu ihrem Kräuseln auf einem verstellbaren Erweiterungsrahmen (13), Mittel (17, 18, 21, 22; 23, 24, 25, 26, 27, 28) zum weiten Öffnen des Rahmens und zum Dehnen der beutelförmigen Folie in Querrichtung, sowie Mittel (15, 15a, 15b) zum Verschieben des verstellbaren Erweiterungsrahmens (13) entlang der Ladung (C), die in einer Umverpackungsstation (T) angeordnet ist, allmähliches Abgeben der beutelförmigen Folie (P) auf der Ladung (C) selbst, dadurch gekennzeichnet, dass
    - der verstellbare Erweiterungsrahmen durch vier Folienaufnahme- und Kräuselanordnungen (23, 24, 25, 26), die an den Rahmenecken angeordnet sind, und durch vier Teleskopstangen (29) ausgebildet ist, die die Aufnahmeanordnungen (23 bis 26) verbinden und die Rahmenseiten bilden,
    - die Zuführungsrollen (B1, B2, B3) in einer Einstellstation S1 bereitgestellt sind, wobei die Rollen die beutelförmige Folie nach oben ziehen, ihre obere Kante öffnen und sie auf dem verstellbaren Erweiterungsrahmen (13) außerhalb der Aufnahmeanordnungen (23 bis 26) und der Teleskopstangen (29) anordnen können,
    - jede der vier Aufnahmeanordnungen (23 bis 26) Mittel (30, 32, 37; 40, 41, 43), zum Bewirken des Kräuselns der Folie (P) mit einer Aufwärtsbewegung während des Ladens der Folie auf den Rahmen (13), und Mittel (30, 32, 37; 40, 41, 43) zum Führen der Folie und/oder Anhalten während des Abgebens auf der Ladung (C) während des Heruntergleitens des verstellbaren Erweiterungsrahmens (13) entlang der Ladung umfasst,
    - wobei die Teleskopstangen (29) mit den Führungsmitteln (30, 32, 37; 40, 41, 43) der Aufnahmeanordnungen zusammenwirken können, um die Folie (P) während der Abgabe auf der Ladung (C) umzukrempeln.
  11. Vorrichtung zum Umverpacken nach Anspruch 10, dadurch gekennzeichnet, dass die vier Folienaufnahme- und Kräuselanordnungen (23, 24, 25, 26) gegenseitig beweglich auf einer horizontalen Ebene jeweils in einer Querrichtung (X-X) und in einer Längsrichtung (Y-Y) auf einem Übergabefahrwerk (14) mit einem starren Kastenaufbau angeordnet sind.
  12. Vorrichtung zum Umverpacken nach Anspruch 11, dadurch gekennzeichnet, dass die vier Folienaufnahme- und Kräuselanordnungen (23, 24, 25, 26) jeweils auf den Führungs- und Schiebemitteln (17, 18, 19, 20, 23, 24a, 25a, 26a) angeordnet sind.
  13. Vorrichtung zum Umverpacken nach Anspruch 12, dadurch gekennzeichnet, dass das Führungs- und das Schiebemittel zwei Paare erster Sattelflächen (17, 17; 18, 18), die entlang zwei gegenüberliegender Seiten des Übergabefahrwerks (14) verschiebbar sind, das mit einem boxenähnlichen Aufbau ausgestattet ist, und zwei parallele Trägerkreuzelemente (19, 20) umfasst, die jeweils mit ihren Enden einstückig mit einem Paar erster Sattelflächen angeordnet sind, und dass die Sattelflächenpaare und Kreuzelemente (17, 17, 19; 18, 18, 20) gegenüber einer ersten Mittelachse (Y1-Y1) des Fahrwerks (14) mit dem kastenförmigen Aufbau gegenseitig symmetrisch gespiegelt beweglich sind.
  14. Vorrichtung zum Umverpacken nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass das Führungs- und das Schiebemittel ferner zwei Paare zweiter Sattelflächen (23a, 26a; 24a, 25a) umfassen, wobei die Sattelflächen jedes Paares gegenüber einer zweiten Mittelachse (X-X) des kastenförmigen Aufbaus (14) symmetrisch gespiegelt verschiebbar sind, wobei die zweite Achse senkrecht zur ersten steht.
  15. Vorrichtung zum Umverpacken nach Anspruch 13 und 14, dadurch gekennzeichnet, dass jeder der zweiten Sattelflächen (23, 24a, 25, 26a) eine der vier Folienaufnahmeanordnungen (23, 24, 25, 26) trägt, wobei die Sattelflächen paarweise jeweils auf einem der Kreuzelemente (19; 20) angeordnet sind, die in entgegengesetzten Richtungen verschiebbar sind.
  16. Vorrichtung zum Umverpacken nach Anspruch 13, 14 oder 15, dadurch gekennzeichnet, dass die Sattelflöchenpaare (23a, 24a, 25a, 26a) und/oder Kreuzelemente (17, 19; 18, 20) durch einen einzigen Motor (21) gesteuert verschiebbar sind, der von Antriebsmitteln betrieben wird, die in entgegengesetzten Richtungen arbeiten.
  17. Vorrichtung zum Umverpacken nach Anspruch 13, 14 oder 15, dadurch gekennzeichnet, dass die Sattelflächenpaare (23a, 24a, 25a, 26a) durch jeweils zwei Motoren (27, 28) gesteuert verschiebbar sind, die von Antriebsmitteln angetrieben werden, die in entgegengesetzten Richtungen arbeiten.
  18. Vorrichtung zum Umverpacken nach Anspruch 16 oder 17, dadurch gekennzeichnet, dass die Antriebsmittel, die in entgegengesetzten Richtungen arbeiten, Ketten (22) umfassen, die jeweils entlang eines zirkularen bzw. umlaufenden Weges laufen, wobei alle zwei Sattelflächen (17, 18; 23a bis 24a, 25a bis 26a), die in entgegengesetzten Richtungen beweglich sind, jeweils mit einer Kettenverzweigung und der gegenüberliegenden Verzweigung dieser Kette verbunden sind.
  19. Vorrichtung zum Umverpacken nach Anspruch 10, dadurch gekennzeichnet, dass jede der vier Folienaufnahme- und Kräuselanordnungen (23, 24, 25, 26) ein winkelförmiges Element des verstellbaren Erweiterungsrahmens (13) ausbildet und als Folienführungs- und/oder Folienanhaltemittel mindestens ein Transportrad (32, 40) umfasst, das an der Außenseite und im Wesentlichen entsprechend der Winkelhalbierenden des Winkelelementes angeordnet ist, und dessen Oberfläche an einer gegenüberliegenden Kräuselführung (30, 36; 41, 42) an einem Foliengreifpunkt und an einem Folienschlepppunkt (TR) der Folie (P) anliegt.
  20. Vorrichtung zum Umverpacken nach Anspruch 19, dadurch gekennzeichnet, dass das Transportrad (40) von einem Motor angetrieben wird und die Kräuselführung eine Anordnung bestehend aus einer Führungsabschnittstange (42) und einem Verschiebeblock (41) umfasst, die mit dem Boden der Abschnittstange (42) verbunden sind.
  21. Vorrichtung zum Umverpacken nach Anspruch 19, dadurch gekennzeichnet, dass das Transportrad (32) im Leerlauf steht und die Kräuselführung durch die Anordnung einer Führungsabschnittstange (36) und eines Paares durch einen Motor angetriebener Räder (30) ausgebildet ist, die in einem Winkel von 90° angeordnet und zueinander so angeordnet sind, dass ihr Umfang im Wesentlichen einen gegenseitigen Kontakt zum Greifpunkt (TR) der Folie P herstellt.
  22. Vorrichtung zum Umverpacken nach Anspruch 10, dadurch gekennzeichnet, dass die Teleskopstangen (29) röhrenförmig ausgebildet sind und einen runden Querschnitt aufweisen.
  23. Vorrichtung zum Umverpacken nach Anspruch 10, dadurch gekennzeichnet, dass
    - der Hauptträgerrahmen (1, 2, 3) eine einheitliche Anordnung neben dem Mittel (T) zum Transportieren der Ladung (C) ausbildet und
    - der verstellbare Erweiterungsrahmen (13) mit seinen jeweiligen Mitteln (23, 24, 25, 26) zum Aufnehmen und Kräuseln der Folie (P) auf dem Rahmen (13) selbst beweglich zwischen einer Position in dem Hauptträgerrahmen zum Vorbereiten des gekräuselten Folienbeutels und einer Position außerhalb des Hauptträgerrahmens und über der zu verpackenden Ladung (C) angeordnet ist,
    - der verstellbare Erweiterungsrahmen ferner vertikal beweglich ist, um den Folienbeutel (P) auf der Ladung (C) aufzubringen.
  24. Vorrichtung nach Anspruch 10 oder 23, dadurch gekennzeichnet, dass der verstellbare Erweiterungsrahmen (13) auf einem Übergabefahrwerk (14) mit einem starren Kastenaufbau angeordnet ist, das entlang einer horizontalen Ebene zwischen der Position zum Vorbereiten des gekräuselten Folienbeutels und der Position über der Ladung (C) beweglich ist.
  25. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Mittel (7, 7a, 7b) zum Schneiden und Thermoschweißen auf einem feststehenden Träger angeordnet sind, der sich am Boden des Hauptträgerrahmens (1, 2, 3) befindet, und sie ein Paar Sattelflächen umfassen, die zueinander beweglich sind und jeweils eine Trennklinge (7b) und eine Schweißdruckvorrichtung (7a) tragen, die sich über die ganze Breite der Schlauchfolie (P) erstreckt.
  26. Umverpackungsvorrichtung nach Anspruch 25, dadurch gekennzeichnet, dass jede Schweißdruckvorrichtung (7a) zu einer Kühldruckvorrichtung (7e) gehörig ist, die sich ebenfalls über die ganze Breite der Schlauchfolie (P) erstreckt.
  27. Umverpackungsvorrichtung nach Anspruch 26, dadurch gekennzeichnet, dass die Kühldruckvorrichtung (7e) eine röhrenförmige Stange umfasst, in der Luft oder Kühlflüssigkeit fließt.
  28. Umverpackungsvorrichtung nach Anspruch 25, dadurch gekennzeichnet, dass jede der Sattelflächen jeweils durch einen Druckluftzylinder (7c) betrieben wird.
  29. Umverpackungsvorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Mittel zum Hinaufführen der Schlauchfolie ein Balkenfahrwerk (8) umfassen, das an zwei Stützen (1a, 1b) des Hauptträgerrahmens (1, 2, 3) entlang gleitet, der von jeweiligen Motoren (8a) angetrieben wird.
  30. Umverpackungsvorrichtung nach Anspruch 29, dadurch gekennzeichnet, dass das Balkenfahrwerk (8) mit einer Achse parallel zu der länglichen Mittelachse Y-Y des Hauptträgerrahmens (1, 2, 3) ausgestattet ist.
  31. Umverpackungsvorrichtung nach Anspruch 29 oder 30, dadurch gekennzeichnet, dass zwei Trägerarme (9a, 9b) des Mittels (11, 12) zum Greifen der Schlauchfolie (P) zu dem Balkenfahrwerk (8) gehörig sind, wobei die Arme (9a, 9b) ausladend an zwei jeweiligen Sattelflächen angeordnet sind, die zueinander auf dem Balkenfahrwerk (8) symmetrisch gespiegelt gegenüber einer querlaufenden Mittelachse X-X der Vorrichtung beweglich sind.
  32. Umverpackungsvorrichtung nach Anspruch 31, dadurch gekennzeichnet, dass das Foliengreifmittel aus zwei Paaren Greifern (11, 12) besteht, wobei die Greifer jedes Paares beweglich auf einem jeweiligen Trägerarm (9a, 9b) angeordnet sind, die Greifer sich näher zueinander oder weiter voneinander symmetrisch gespiegelt zur länglichen Mittelachse Y-Y des Hauptträgerrahmens bewegen.
  33. Umverpackungsvorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass sie eine Schlauchfolienwahl- und Zuführstation (SL) umfasst, die an dem Boden des Hauptträgerrahmens (1, 2, 3) angeordnet ist.
EP04103938A 2003-08-28 2004-08-17 Verfahren und Vorrichtung zum versiegelten Umverpacken einer Ladung mit einer Schlauchfolie aus dehnbarem Kunststoffmaterial Expired - Lifetime EP1510460B1 (de)

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ITMI20121690A1 (it) 2012-10-09 2014-04-10 Sestese Off Mec Macchina d'imballaggio incappucciatrice perfezionata, con regolazione in altezza del dispositivo di distribuzione.
ITMI20121689A1 (it) * 2012-10-09 2014-04-10 Sestese Off Mec Macchina d'imballaggio incappucciatrice perfezionata, con cambio automatico delle bobine.
DK2993134T3 (en) 2014-09-05 2017-05-01 Officina Mecc Sestese S P A coating device
IT201600127868A1 (it) * 2016-12-19 2018-06-19 Messersi Packaging Srl Macchina incappucciatrice con struttura perfezionata
CN106891537B (zh) * 2017-04-21 2023-04-25 山东新华医疗器械股份有限公司 一种铝膜焊接机
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