Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
  • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
  • B65B11/38—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths
  • B65B11/40—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents
  • B65B11/42—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
  • B65B35/30—Arranging and feeding articles in groups
  • B65B35/44—Arranging and feeding articles in groups by endless belts or chains
• • 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
  • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
  • B65B35/56—Orientating, i.e. changing the attitude of, articles, e.g. of non-uniform cross-section
• • 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
• • 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
  • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
  • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
  • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting

Definitions

• the invention relates to a method for packaging products, in particular of hygiene products, in packaging bags, in which folded after insertion of the products in the packaging bag whose end faces by folding the end walls of the side walls each formed end flaps and then welded, wherein the packaging bag for Welding its end faces in a transport direction is passed through a welding station. It further relates to a packaging system for packaging products in packaging bags, in particular for carrying out the method.
• Hygiene products such as paper handkerchiefs, panty liners, sanitary napkins, diapers or the like are usually packaged individually or in predetermined batches, for example in the form of five or ten packs, in film and offered in this packaged form ready for consumption or ready for use.
• the film surrounding the hygiene product or the stack of hygiene products forms a so-called packaging bag, which i.a.
• packaging bag which i.a.
• it can be equipped with a perforation for easier opening and / or with adhesive tabs or the like for resealing.
• other products or product batches such as cigarette packs or the like, can be provided with such a packaging bag in the manner of an overpack.
• the product in particular the hygiene product or the stack of hygiene products
• it may be provided, for example, that suitably cut film pieces intended to form the packaging bag are provided in which the product is inserted, the film subsequently being wrapped around it and welded at the edges.
• a concept for packaging hygiene products in a packaging bag is known for example from DE 101 48 283 A1, in which a so-called cellular wheel is provided for the actual packaging step.
• the intended for forming the packaging bag film is first inserted into a chamber of the cell wheel, then a stack of hygiene products is also introduced into the chamber of the cell wheel. Thereafter, the side edges of the film are circumferentially overlapped around the stack of sanitary products and appropriately welded together.
• a so-called film tube packer can be used, as it is known for example from DE 10 2008 020 800 A1.
• the sanitary products or packages of hygiene products to be packaged are positioned in a so-called tubular bag machine in a film tube, which is then welded together and separated between the products.
• the packaging systems are usually designed in the manner of continuous systems.
• the products to be packaged are conveyed consecutively, individually or in stacks along a transport direction and surrounded with the packaging bag during the passage through various system components arranged along the transport direction.
• a short-term system downtime is usually to be accepted when folding and welding the side portions of the packaging bag, in which the further transport of the products temporarily interrupted.
• the invention is therefore based on the object of specifying a method for packaging products of the type mentioned above, with particularly high throughput and production rates can be achieved by particularly needs-oriented preparation of the products for the front side welding and thus ensures a particularly high production speed with high reliability is. Furthermore, an especially suitable for carrying out the method packaging system should be specified.
• this object is achieved according to the invention by folding rear end tabs as seen in the transporting direction of the packaging bag by folding past a folding cam on the packaging bag in the transport direction, as seen in the transport direction, from the rear to the front.
• the invention is based on the consideration that in order to achieve particularly high throughput and production rates a continuous and uninterrupted passage of the products or product stack through the packaging system should be sought.
• all processing steps during the introduction of the products or product stacks into the respective packaging bags should be designed consistently for a continuous operation.
• the welding steps and also the preliminary preparatory steps should be designed consistently for accessing the product passing through from the side.
• the respective welding mirrors which ensure the required heat input into the film material should be used. Ask, which eventually leads to the welding of the overlapping film parts together, each be arranged laterally to the transport direction of the products or product stack, so that the products or product stack seen in the transport direction can be passed between the welding mirrors or heating elements.
• a Faltnocken is provided, which is passed in the manner of an "overtaking Faltnockens" from back to front with excess speed on the packaging bag, while the rear front lobe flips forward.
• the movement or speed profile of the "overhauling" folding cam in relation to the respective packaging bag or its rear end flap is especially designed for an efficient folding-over operation Relative speed of Faltnockens, based on transport speed of the packaging bag, while its passage on the packaging bag is adjusted depending on the position of the folding cam relative to the rear end lobe.
• a comparatively long contact phase or time can be set, in particular during the overtaking process, in which the folding cam is guided past the frontal flap to be folded, in which the folding cam is in contact with the frontal flap and thus laterally guides and fixes, whereas the transfer phase or time, during which the folding cam is brought from behind to be folded over the front flap or moved away from the fold after folding, can be kept comparatively short.
• the folding of the rear end flap initially in a transfer or approach phase of the folding cams with a comparatively large velocity excess seen from the rear of the rear end lobe compared to the transport speed of the packaging bag and brought into overlap with this before in a subsequent contact or holding phase, a comparatively lesser speed of the folding cam is adjusted relative to the transport speed of the packaging bag.
• the lateral guidance and stabilization of the folded end flap can in particular also be designed so that a reliable folding of the end flap even with unbroken material, ie in particular without prior introduction of a so-called pre-broken edge or Umfaltkante in the material is possible.
• front end flap is folded by passing the packaging bag to a stationarily held folding cams. It can accumulate on the stationarily held folding cams by the already provided onward transport of the packaging bag, the front end lobe so that it automatically folds due to the onward transport on the front side.
• a particularly reliable end folding is possible, since in the comparatively long-lasting contact phase the overtaking folding cams can guide and fix the rear end lobe laterally until the front end lobe is likewise folded over and then the front, fixedly held Faltnocken in the manner of a transfer the fixation and the rear Stirnlappens can continue to ensure.
• Particularly high throughput rates can be achieved by treating both end faces of the packaging bag together, ie in particular in a common processing step, in a further advantageous embodiment.
• the packaging system is advantageously designed symmetrically, so that even when folding the end faces, the respective end flaps of both end faces are folded simultaneously.
• the products to be packaged are wrapped in a bag film tube, which is then passed through a first
• To consistently and favoring a throughput rate for both welding steps to allow lateral access is advantageously rotated after welding the longitudinal side and before the folding of the end faces of the packaging bag provided with the products relative to the transport direction by an angle corresponding to the spanned by two abutting product pages angle of rotation.
• the welding process is carried out in two stages.
• a first welding step for example, first the open longitudinal side of the packaging bag can be welded under access from the side.
• Twisting should be done appropriately according to the basic shape or area of the product or product stack.
• the product could have a substantially triangular basic shape, so that the rotation takes place about one of the triangular angles.
• a twist angle of 90 ° is suitably chosen. The twisting can be done by maintaining the transport direction and rotating the product, or by maintaining the orientation of the product and changing the transport direction appropriately.
• a folding station arranged for folding the end faces, arranged on a transport system for the packaging bags, one arranged on a carrier element, seen in the transport direction from back to front on the packaging bags includes passable folding cams.
• the folding station is assigned in an advantageous embodiment, a control unit for adjusting the speed of movement of the folding cam.
• the control unit is expediently designed to adjust the speed of movement of the folding cam in dependence on its position relative to the respective packaging bag. It is provided in a particularly advantageous embodiment that the control unit adjusts a comparatively large speed surplus of the folding cam against the transport speed of the packaging bag during the approach of the folding cam from behind to the front flap, whereas when the folding cam has reached the front flap and overlaps with this, a comparatively lesser speed surplus or even a temporary stoppage of the folding cam with respect to the packaging bag, so aligned speeds, is provided.
• the adaptation of the speed of the folding cam to the relative position to the packaging bag could take place by detecting a position signal for the respective packaging bag and taking into account this signal in the control unit in the manner of an active control.
• a clocked operation of the packaging plant and a control of the Faltnockens depending on the system clock is provided.
• the folding station additionally comprises a further folding cradle held stationary, in particular for folding over the front end tabs seen in the transporting direction of the packaging bag by passing the packing bag past.
• the folding station is designed for simultaneous or simultaneous processing of both end faces of the packaging bag.
• the folding station advantageously comprises, for each of the end faces, a further folding cam which can be guided past the packaging bags from the rear to the front in the transport direction and / or a further folding cam which is held stationary.
• the support element for the respective movable folding cams could for example be designed as a gear-driven link chain or as a turntable.
• the support element for the overhauling Faltnocken is advantageously designed as a folding wheel rotatable about a horizontal axis of rotation.
• two folding wheels with correspondingly attached folding cams namely one for each one of the end faces of the packaging bag, be mounted on a common axis of rotation.
• the design of the carrier element as a folding wheel with a horizontal axis of rotation, corresponding to a vertical plane of the wheel, also allows a single-surface configuration of the folding cam in its contact area with the front flap.
• the resulting contact surface with the end flap is designed with regard to its geometry and dimensions for a particularly stable and reliable lateral guidance of the folded end flap.
• the support element is expediently provided with a number of Faltnocken, each having a contact surface for the fold over end flap, which is at least half as large as the surface of the respective end flap.
• the packaging system advantageously comprises a transport system, via which the hygiene products to be packaged can first be fed from a wrapping station to a first welding station and from this from a second welding station. It is particularly preferred seen in the transport direction of the hygiene products between the first welding station and the folding station, a deflection unit for rotating the provided with the hygiene products packaging bag relative to the transport direction by a predetermined angle of rotation, preferably by 90 °, is provided.
• the packaging installation furthermore has a separating unit for the packaging bags arranged after the first welding station, as seen in the transporting direction.
• FIG. 1 a packaging installation for packaging hygiene products
• FIG. 2 a packaging bag containing a product stack just before
• FIG. 3 shows the packaging bag according to FIG. 2 after the endfold
• FIG. 4 a folding station of the packaging installation according to FIG. 1 ,
• FIG. 5 shows a sequence (FIGS 5 a - n) to illustrate the sequence of movement of a passing folding cam
• FIG. 6 a path-time diagram.
• the packaging system 1 according to FIG. 1 is provided for packaging hygiene products in a packaging bag.
• tissue handkerchiefs are to be introduced in batches, ie as a stack of individual handkerchiefs, with a batch size of ten each into a packaging bag as hygiene products.
• other batch sizes such as the packaging of three or five paper tissues in a packaging bag, or other hygiene products such as panty liners, sanitary napkins or the like, could be provided.
• the packaging installation 1 is designed as a so-called film tube packer, in which the paper tissues to be packaged are batched or stacked. next be wrapped in a bag film tube 4.
• the packaging installation 1 comprises a feed unit 8, via which the paper tissues in the form of product stacks 6, in each case comprising ten paper tissues lying one above the other, are fed to a transport system 12.
• the feed unit 8 is designed with two lanes, ie, in the manner of a parallel arrangement of two feed rails 14, the product stacks 6 are fed parallel to one another to the transport system 12.
• This two-lane arrangement makes it possible, in particular, to combine a plurality of transport strands for a common further processing of the product stacks 6.
• doubled throughput rates during packaging and during further processing of the product stacks 6 can be achieved.
• the transport system 12 is u.a. a wrapping station 16 is assigned, in which in a suitable film storage, for example in the form of rolls or the like provided for forming the packaging bag bag film 10 is kept.
• a suitably shaped form shoe 18 is provided, over which the bag film 10 is placed around the product stack 6 transported along the transport system 12, wherein the paper handkerchiefs are wrapped in the film.
• the form shoe 18 is designed such that the supplied film completely surrounds the continuous product stack 6, wherein an overlap of the corresponding edge regions of the film is set on the longitudinal edge of the resulting bag film tube 4.
• the impact station 16 is provided with suitable means for the local synchronization of the product stack 6 with the bag film 10.
• This can be ensured, for example, that a formed by a perforation in the bag film 10 access opening in the packaging bag is also suitably positioned relative to the embraced in the packaging bag product stack 6.
• a downstream first welding station 20 can be fed.
• the first welding station 20 has in a lateral arrangement a suitably designed, in particular designed as a welding mirror heater 22, via which the film tube 4 is heated to a sufficiently high temperature for welding. As a result of the heating, the overlapping edge regions of the film are welded together so that the actual film tube 4 is formed in the first welding station 20.
• the film tube 4 thus forms a continuous enclosure of several consecutive product stacks 6 of tissue paper towels.
• the transport direction of the product stack 6 of the paper tissues on the transport system 12 is indicated. Seen in this transport direction after the first welding station 20, a separating unit 26 is provided, via which the bag film tube 4 provided with the hygiene products is separated into packaging bags 27 each containing a product stack 6.
• the singling unit 26 can have, for example, suitable cutting blades for severing the bag film tube 4 between two successive product stacks 6.
• the transport system 12 opens into a deflection unit 28, in which the bag film tube 4 provided with the hygiene products is rotated relative to the transport direction by a predetermined angle of rotation 32.
• the angle of rotation 32 is chosen such that, after the rotation, lateral access to the not yet welded end faces 34 of the packaging bag 27 containing the respective product stack 6 is possible. Accordingly, the angle of rotation 32 based on the base area of the product stack 6 corresponds to the angle spanned by two sides of the product stack 6. In the execution area, the product stack 6 has a substantially rectangular base area, so that a twist angle 32 of 90 ° is selected.
• the deflection unit 28 is configured such that in the region of the deflection unit 28 -as indicated by the arrow 30 -a change of the transport direction of the hygiene products on the transport system 12 takes place by 90 °. This change in the transport direction is provided without any change in the orientation of the product stack 6 with the packaging bag 27 surrounding it, so that the orientation of the product stack 6 in the deflection unit 28 changes by approximately 90 ° relative to the transport direction.
• the product stacks 6 taken in the bag film 10 can be fed via the transport system 12 to a downstream second welding station 36.
• the welding of the end faces 34 of the packaging bag 2 takes place for the product stacks 6, wherein due to the orientation of the stack 6 relative to the transport direction, the welding can also take place from the side.
• the second welding station 36 also comprises laterally arranged heating means 38, which may be designed, for example, as a heating mirror arranged on both sides of the product flow.
• the transport system 12 opens into a second welding station 36 downstream cooling device in which a cooling of the freshly welded packaging bag 27 takes place.
• a so-called end folding that is to say a preliminary folding of the end faces 34 of the packaging bags 27, is initially provided.
• the representation of a product bag 6 containing packaging bag 27 in FIGS. 2, 3 can be removed comprises the substantially cuboid packaging bag 27 in addition to its two end faces 34 four side walls 40, namely a front 42, a back 44 and two lateral narrow sides 46.
• Each of the side walls 40 forms each end face a front flap 48.
• the end flaps 48 of the side walls 40 are folded over and, as shown in FIG. 2 is removable, folded and brought into overlap.
• the packaging installation 1 comprises a folding station 50 arranged on the transport system 12, as shown in an enlarged view in plan view in FIG. 4 is shown. This is consistently designed so that the endfolding of the packaging bag 27 from the side, so under lateral access, both sides continuously and without interrupting the production or transport process, ie in particular while avoiding system or transport stoppages can take place.
• the folding station 50 comprises on both sides of the transport system 12 each designed as a folding wheel with a horizontal axis of rotation 51 support member 52.
• On carrier element 52 is a number of seen in the transport direction from behind to front of the packaging bags 27 passing folding cams 54 arranged. This is based on the knowledge that for a continuous folding operable continuously with the transport process, in particular the proper folding over of the rear end flap 48 seen in the transport direction of the packaging bag 27 can be problematic.
• the folding cam 54 is configured in the manner of an "overtravelling folding cam" in such a manner that it is brought from behind to the rear end flap 48 with a higher speed as compared with the transport speed of the packaging bag 27. After the folding cam 54 engages the front tabs 48 has reached, he folds this forward because of the speed surplus.
• FIG. 2 symbolizes the transport direction by the arrow 30 and the "overtaking" folding cam 54 shown schematically.
• the folding station 50 in FIG. 4 is removable, it is designed for simultaneous processing of both end faces 34 of the packaging bag 27 symmetrical and comprises on both sides of the measures provided for the transport of the packaging bag 27 conveyor belt 56 each have the required folding elements.
• the carrier element 52 for the respective movable folding cams 54 are arranged on a common axis of rotation 51.
• the folding station 50 for each of the end faces 34 each still another, held stationary folding cams 60.
• the folding station 50 is associated with a control unit 62, via which the rotational speed of the rotation axis 51 and thus the speed of movement of the overtrawn Faltnocken 54 is adjustable.
• the control unit 62 is designed in such a way, in particular by means of a suitably stored speed profile for the overturning folding cams 54, that a comparatively large excess of speed of the folding cam 54 occurs during the approach of the folding cam 54 from the rear to the respective end flap 48 relative to the transport speed of the respective packaging bag 27 sets, whereas when the Faltnocken 54 has reached the end flap 48 and overlaps with this, a comparatively lesser speed excess or even a temporary stoppage of the folding cam 54 relative to the packaging bag 27, so aligned velocities, is provided.
• the resulting motion sequence is shown schematically in the sequence a - n in FIG. 5 is shown.
• one of the folding wheels with a horizontal axis of rotation 51 running carrier elements 52 are shown with molded folding cam 54 and in addition a number of conveyed on the conveyor belt 56 packaging bag 27, wherein due to the lateral view of the end face 34 of the respective packaging bag 27 is visible.
• the carrier element 52 provided with the folding cams 54 is moved thereon.
• sequence step b is the respective Faltnocken 54 in the transport or pre-accession phase and is - brought by suitably set, comparatively large rotational speed of the rotation axis 51 - with relatively high speed from behind to the packaging bag 27.
• sequence step c extends the Faltnocken 54, the rear end tabs 48 of the packaging bag 27 and begins to fold this due to the overlap with its contact surface 64 (in the illustration inside, so the packaging bag 27 facing). At about this time, the rotation speed of the rotation shaft 51 and thus the moving speed of the folding cam 54 are lowered and slowed down.
• the folding cam 54 is in lateral contact with the front flap 48 and guides it, the front flap 48 being folded over. In this phase, the folding cam 54 is moved with only a slight excess of speed relative to the packaging bag 27, resulting in a comparatively long-lasting contact phase. During this leads and stabilizes the Faltnocken 54 the folded front flap 48 laterally.
• the folded rear end flap 48 reaches the fixed front fold cam 60 and is further fixed and guided by the latter; So there is a "transfer” from the overtrawn Faltnocken 54 to the stationary Faltnocken 60 instead.
• next folding cams 54 can be brought to the next packaging bag 27 with a suitable speed.
• the relative velocity between folding cam 54 and packaging bag 27 that is particularly preferred during the passage of the folding cam 54 past the packaging bag 27 is particularly clear in the path-time diagram according to FIG. 6 recognizable.
• the time is plotted on the x-axis and the component position on the y-axis, through the curve 66 for the packaging bag 27 and through the curve 68 for the folding cam 54.
• the straight-line shape of the curve 66 makes it clear that that the packaging bag 27 is moved on the conveyor belt 56 at a uniform speed.
• the speed of the folding cam 54 (corresponding to the slope of the curve 68) depends on its positivity.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Containers And Plastic Fillers For Packaging (AREA)
• Packages (AREA)

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Publications (2)

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Family Applications (1)

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• 2011
  • 2011-04-27 DE DE102011018839A patent/DE102011018839A1/de not_active Ceased
• 2012
  • 2012-04-27 WO PCT/EP2012/001823 patent/WO2012146385A2/de not_active Ceased
  • 2012-04-27 PT PT127248896T patent/PT2701978T/pt unknown
  • 2012-04-27 EP EP12724889.6A patent/EP2701978B1/de active Active
  • 2012-04-27 KR KR1020137031372A patent/KR101625541B1/ko active Active
  • 2012-04-27 ES ES12724889.6T patent/ES2603195T3/es active Active
  • 2012-04-27 HU HUE12724889A patent/HUE032832T2/hu unknown
  • 2012-04-27 PL PL12724889T patent/PL2701978T3/pl unknown
  • 2012-04-27 RS RS20160998A patent/RS55383B1/sr unknown
  • 2012-04-27 CN CN201280020537.3A patent/CN103562072B/zh active Active

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