WO2021259547A1 - Dispositif de conditionnement sous film rétractable, installation d'emballage et procédé de production de lots de marchandises - Google Patents

Dispositif de conditionnement sous film rétractable, installation d'emballage et procédé de production de lots de marchandises Download PDF

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Publication number
WO2021259547A1
WO2021259547A1 PCT/EP2021/062276 EP2021062276W WO2021259547A1 WO 2021259547 A1 WO2021259547 A1 WO 2021259547A1 EP 2021062276 W EP2021062276 W EP 2021062276W WO 2021259547 A1 WO2021259547 A1 WO 2021259547A1
Authority
WO
WIPO (PCT)
Prior art keywords
shrink
shrinking
detection device
tunnel
film
Prior art date
Application number
PCT/EP2021/062276
Other languages
German (de)
English (en)
Inventor
Wolfgang Huber
Florian Kaestner
Marcus KREIS
Original Assignee
Krones Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krones Aktiengesellschaft filed Critical Krones Aktiengesellschaft
Publication of WO2021259547A1 publication Critical patent/WO2021259547A1/fr

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices
    • B65B57/10Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/16Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to stop, or to control the speed of, the machine as a whole
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B53/00Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/063Tunnels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices
    • B65B57/02Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/08Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to stop, or to control the speed of, the machine as a whole

Definitions

  • the present invention relates to a shrinking device, a packaging system and a method for producing packaging units according to the features of the independent claims.
  • shrink film is generally wrapped around an assembly of several articles as a film cut by means of a wrapping system.
  • This set of articles wrapped in shrink film is transported through a shrink device, for example a shrink tunnel with a transport path.
  • a shrink tunnel the articles wrapped with shrink film are exposed to a shrink medium, for example warm or hot air, from the sides and / or from below.
  • the heat supply causes the shrink film to contract and nestle against the item, creating the finished film shrink pack.
  • a shrink tunnel can also be used to apply shrink labels or similar to items. Both the shrinkage quality and the energy consumption play a major role in these processes.
  • the lateral supply of shrinking medium takes place, for example, via nozzle pipes, nozzle channels or shaft walls.
  • the known shaft walls are typically formed by lateral spraying devices in the form of perforated hollow bodies with so-called nozzle surfaces, with hot air being blown into the inner cavity of the shaft walls, which then flows through the shrink medium outlet openings or nozzle openings into the interior of the shrink tunnel.
  • the shaft walls each have at least one air inlet opening, preferably arranged in the upper region, through which the hot air is blown into the shaft wall from above.
  • the shaft walls are designed to be adjustable, so that a distance from the articles wrapped with shrink film can be set.
  • the compositions wrapped with shrink film are processed in several parallel lines in the shrink tunnel.
  • means for introducing the shrinking medium must also be provided, which inject the shrinking medium between the article assemblies that are guided in parallel.
  • shrink tunnels that have or use two outer shaft walls and at least one so-called middle or inner shaft wall are used for multi-lane processing.
  • Outer shaft walls have a closed side surface and a nozzle surface, which in particular delimits the interior of the shrink tunnel.
  • the at least one inner shaft wall has two side wall surfaces in the form of nozzle surfaces, which are arranged parallel to the transport direction, so that hot air flows into the respective partial interior of the shrink tunnel on both sides and thus for the lateral impact of the articles or combinations of articles guided in two parallel lanes hot shrinking medium.
  • the supply of shrinking medium from below is usually implemented in that the articles wrapped with shrink film are transported within the shrinking device via a conveyor belt designed as a mesh belt.
  • the mesh belt is formed, for example, by two hollow pin chains with cross struts and a wire winding. Through the wire winding, the articles wrapped with shrink film can also be acted upon in a targeted manner from below with shrink medium, for example hot air.
  • the object of the invention is to eliminate the aforementioned problems which result from the processing of incorrectly wrapped article combinations and / or the presence of foreign or disruptive objects within a shrinking device.
  • the invention relates to a shrinking device which is particularly suitable for producing packaging units in the form of shrink-film packs from assemblies of articles each wrapped in a shrink-film.
  • a shrinking device which is particularly suitable for producing packaging units in the form of shrink-film packs from assemblies of articles each wrapped in a shrink-film.
  • corresponding article combinations are created from a plurality of articles.
  • arrangements of six articles are put together in which the articles are each arranged in two parallel rows, each comprising three articles, as a so-called six-pack.
  • the articles are preferably containers or containers, in particular empty or filled beverage containers such as bottles or cans.
  • the article assemblies are fed to a film wrapping module and wrapped in a film section of shrink film, the articles being arranged in an upright position, in particular on the two opposite film ends.
  • the assembly of articles wrapped in this way with shrink film is transported to the shrink device and in particular moved through the shrink tunnel of the shrink device via a suitable transport device.
  • the article combinations wrapped with shrink film are acted upon with a shrinking medium, for example with hot air or the like.
  • the shrinkage temperature applied by the shrinking medium to the shrink film causes the shrink film to shrink according to its film properties and to adapt to those facing outwards
  • the outer circumferential surfaces of the articles of the article combination are applied, whereby the packaging units or shrink film packs are formed.
  • the packaging units After the packaging units have left the shrink tunnel, it can be provided that they are at least largely cooled to ambient temperature by blowing cooler air or another suitable coolant before or while they are fed to further handling and / or treatment stations or handling modules of the packaging system for further handling will.
  • a layer arrangement that can be palletized is then assembled from a plurality of packaging units in a layer formation module and several layer arrangements that can be palletized are stacked on top of one another in a palletizing module and thus combined to form larger storage or transport units.
  • the shrinking device is assigned at least one first detection device, which is used to detect parameters of objects entering the shrink tunnel of the shrinking device, in particular of article combinations wrapped with the shrink film and / or foreign objects.
  • the first detection device is designed to detect the shape and / or size or the like of objects located on the transport device.
  • the recorded parameters can provide information as to whether the recorded object is a correctly configured article combination wrapped in shrink film, or whether it is an undesired foreign object that can lead to disruptions in the production process.
  • the at least one first detection device is preferably arranged in an initial area of the shrinking device, in particular in an area in front of the entry opening of the shrink tunnel, so that the article assemblies wrapped with shrink film or possibly foreign objects located on the transport device can be detected by the at least one first detection device before they are enter the shrink tunnel.
  • the at least one first detection device can also be arranged in the area of the entry opening of the shrink tunnel, possibly even adjacent to the entry opening within the shrink tunnel.
  • individual articles, individual shrink film sections, incorrectly wrapped article assemblies or the like are referred to as foreign objects.
  • Article assemblies incorrectly wrapped with shrink film have a shape or form which does not correspond to the shape or form of a correctly designed article assembly wrapped with shrink film due to an incorrect number of articles or because articles have fallen over within the assembly.
  • the first data or signals recorded by the at least one first detection device are transmitted to a control / computer unit assigned to the shrinking device, which processes the first data or signals supplied by the at least one first detection device in order to enclose objects, in particular with shrink film Wrapped article assemblies and / or foreign objects to be recognized within the transport device of the shrinking device, in particular on the transport device of the shrinking device.
  • the at least one first detection device is preferably formed by a sensor device which is used to determine time-based signals.
  • the at least one first detection device detects first data or signals that establish a relationship between a conveying speed of the transport device of the shrinking device and a time interval for an article combination wrapped in shrink film that passes the at least one first detection device and enters the shrink tunnel of the shrinking device.
  • the at least one first detection device is formed by a light barrier arrangement, by an ultrasonic sensor, by a mechanically operating sensor, by a proximity sensor or by a camera.
  • a suitable light barrier arrangement comprises a transmitter and a receiver, which are arranged opposite one another on the transport device of the shrinking device.
  • the transmitter is formed by a light beam source and the receiver is formed by a corresponding light sensor.
  • the receiver of the light barrier arrangement detects an interruption of the from when objects are present on the transport device Emitter emitting light beam, which generates an electrical signal.
  • This electrical signal varies depending on the size and shape of the object.
  • the at least one first detection device can also be formed by an ultrasonic sensor in which the distances between the objects transported via the transport device are determined with the aid of ultrasonic waves.
  • the sensor head emits an ultrasonic wave which is reflected back from the target object located on the transport device or a reflector arranged on the opposite side of the transport device.
  • the ultrasonic sensor detects a distance to the target or the reflector by measuring the time between sending and receiving the ultrasonic wave.
  • the distance to the reflector is known and in particular marks distances between objects arranged on the transport device, while the distance to the objects provides information on the objects on the transport device.
  • the at least one first detection device can be formed by a mechanically operating sensor or a proximity sensor.
  • a camera with image recognition software is also conceivable.
  • the image recognition software can be integrated in the camera or stored in the control / computer unit.
  • the first data acquired by the at least one first acquisition device and / or the first signal generated by the at least one first acquisition device is transmitted to the control / computer unit.
  • This contains, in particular, information on the size and shape of a correctly designed, shrink-wrapped article combination and / or on the size and shape of a correctly designed packaging unit.
  • the control / computer unit can contain further information, for example information on the size and shape of the individual items.
  • further information for example information on the size and shape of the individual items.
  • correction mechanisms are activated which serve to remove the foreign object from the shrinking device before it gets into the shrinking tunnel of the shrinking device. This can be realized in particular if the first detection device is arranged upstream or upstream of the shrink tunnel in the transport direction.
  • the entry opening of the shrink tunnel is assigned a closure element which, when a foreign object is detected, is activated by the control / computer unit and closes the entry opening of the shrink tunnel.
  • the closure element can be or be formed by a partition that is movable in the vertical direction, which is in an open position during ongoing production operations and which can be transferred to a closed position when a corresponding error signal is output by the control / computer unit.
  • the bulkhead can be arranged in an upper open position and a lower closed position.
  • an at least temporary stop of the transport device of the shrink device and / or a stop of the production of the entire packaging system is / are preferably also provided.
  • the foreign object can now be removed from the shrinking device, for example by appropriate operating personnel, in order to prevent subsequent disruption of the production operation.
  • the foreign object identified as defective can be diverted in front of the shrink tunnel of the shrinking device.
  • a suitable diversion element in the form of a pusher or the like can be provided that removes the foreign object from the transport device.
  • control / computer unit can also be taken over, for example, by a machine control of the packaging system, which controls, monitors and / or coordinates a majority or all of the modules of the packaging system and, in particular, monitors and controls product tracking within the entire packaging system.
  • control / computer unit of the shrinking device can be coupled to the machine control of the packaging system, so that the shrinking device is controlled and monitored by a coordinated control of the control / computer unit and the machine control.
  • the further handling and / or treatment stations or handling modules downstream of the shrinking device are coupled to the shrinking device via the transport device or further conveying devices and that the further handling modules are also connected in terms of signaling and / or control technology to the control / computer unit of the shrinking device and / or the machine control of the packaging system are coupled.
  • this coupling makes it possible to generate corresponding error signals when foreign objects are recognized within the shrinking device and to control the subsequent handling modules accordingly in a modified manner.
  • the subsequent handling modules are deactivated or stopped, at least for a short time, until the source of the error within the shrinking device has been eliminated. In this way, for example, it can be prevented that incorrect layer images are generated for palletizing or the like due to missing packaging units.
  • At least one second detection device can additionally be assigned to the shrinking device, which at least one second detection device is arranged in particular downstream behind the first detection device.
  • the at least one second detection device is preferably arranged downstream behind the shrink tunnel of the shrink device.
  • the at least one second detection device can also be arranged in the area of the outlet opening of the shrink tunnel or adjacent to it within the shrink tunnel. Which is at least one second detection device provided and / or designed for the acquisition of parameters of objects that are exiting the shrink tunnel and that have been processed into shrink film packs, in particular packaging units and / or foreign objects.
  • the second detection device detects the shape and / or size or the like of objects located on the transport device and transmits the detected second data or the second signals generated by the second detection device to the control / computer unit of the shrinking device and / or the Machine control of the packaging system.
  • the at least one second detection device is also preferably formed by a sensor device which is used to determine time-based signals.
  • signals are detected that establish a relationship between the conveying speed of the transport device and a time interval for an object passing the second detection device and exiting the shrink tunnel of the shrinking device.
  • the at least one second detection device is preferably also formed by a light barrier arrangement, an ultrasonic sensor, a mechanically operating sensor, a proximity sensor or a camera with associated image evaluation software.
  • control / computer unit and / or the machine control of the packaging system is / are designed to receive the first data and / or signals supplied by the at least one first detection device and the second data and / or signals supplied by the at least one second detection device. or to compare signals and / or to check them for plausibility. It is recognized, for example, when individual objects, in particular foreign objects, have remained within the shrink tunnel.
  • the method for the production of packaging units in the form of shrink film containers can in particular provide that, as part of the data evaluation by the control / computer unit and / or the machine control, a comparison of the first data or signals supplied by the first detection device with the second data supplied by the second detection device Data or signals and / or a plausibility check of the first and second data or signals is carried out.
  • a plausibility check is carried out at least to determine whether an object that has entered the shrink tunnel of the shrink device can be assigned a corresponding object emerging from the shrink tunnel of the shrink device.
  • a plausibility check is carried out to determine whether an article assembly wrapped with shrink film that has entered the shrink tunnel of the shrink device can be assigned a packaging unit exiting the shrink tunnel of the shrink device.
  • a plausibility check can be carried out to determine whether a foreign object that has entered the shrinking device can be assigned to a foreign object emerging from the shrinking tunnel of the shrinking device. It can be recognized, for example, whether a foreign object has remained within the shrink tunnel. If, for example, the foreign object is an individual article, for example a lying bottle or can, then there is the risk that the article will end up under or behind the shaft walls of the shrink tunnel. Due to the high temperatures inside the shrink tunnel, there is a risk that the bottle or can will burst and that the contents will contaminate the interior of the shrink tunnel.
  • Another embodiment can count the objects entering the shrink tunnel of the shrink device, in particular the article assemblies wrapped with shrink film, as well as a count from the shrink tunnel the shrinking device leaking objects, in particular the packaging units.
  • the dimensions, in particular the shape and / or size, of the objects entering the shrink tunnel of the shrink device and the objects exiting the shrink tunnel of the shrink device can be recorded.
  • a signal difference is calculated from the comparison of the first data or signals supplied by the at least one first detection device and the second data or signals supplied by the at least one second detection device. If the signal difference results in a deviation and the signal difference exceeds a defined limit value, an error signal is generated and, if necessary, corrective mechanisms are initiated directly.
  • data or signals from a detection device are compared with the expected setpoint signals, the expected setpoint signals being stored as information in the control / computer unit and / or the machine controller.
  • a corresponding error signal is generated when a deviation that exceeds a defined limit value is determined.
  • An example of this would be an ascertained deviation in shape and / or size between a target shape and / or target size of the article assemblies encased with shrink film entering the shrinking device and a target shape and / or target size of the packaging units leaving the shrinking device.
  • the first data or signals of the at least one first detection device and / or the second data or signals of the at least one second detection device and / or the calculated signal differences for further handling and / or treatment stations or handling modules downstream of the shrinking device the packaging units are made available to this in a corresponding manner to control and, if necessary, to take corrective action in the production process. For example, when a foreign object is detected after the shrink tunnel, a corresponding error correction or program change can be provided for the subsequent handling modules.
  • the movement pattern can be changed automatically by robots handling the packaging units, so that they do not grip the foreign object, but instead the subsequent correctly configured packaging unit.
  • provision can be made to change the movement pattern of the robots briefly in such a way that they pick out the foreign object from the transport path within the packaging system and thus remove the foreign object from the production process.
  • a detection device in the form of a light barrier is located in the inlet area of the shrink device, preferably outside the shrink tunnel.
  • This light barrier is used to count the article assemblies encased in shrink film and entering the shrink tunnel.
  • the light barrier monitors every object entering the shrink tunnel and detects deviations which do not match the properties of the shrink-wrapped article combinations.
  • the light barrier is coupled, for example, to a machine control that monitors and controls product tracking within the entire packaging system.
  • a machine control that monitors and controls product tracking within the entire packaging system.
  • the distances between the article assemblies that enter the shrink tunnel and are wrapped in shrink film are queried. If there is another foreign object within the distance, it must be an error and a corresponding error message is generated. This can be output optically and / or acoustically, for example via a suitable control panel or the like, so that the operating personnel are warned and can take appropriate corrective measures.
  • the detected foreign object is formed, for example, by a single article or a piece of shrink film.
  • One embodiment provides that the machine control already activates protective mechanisms within the system in connection with an error message.
  • the entrance of the shrink tunnel is closed in order to prevent the foreign objects recognized as faulty from entering the shrink tunnel.
  • a bulkhead plate can be provided that closes the inlet opening of the shrink tunnel.
  • the foreign object identified as defective can be diverted in front of the shrink tunnel of the shrinking device.
  • a diversion element in the form of a pusher for example in the form of a bar extending parallel to the transport direction, can be provided, which is pushed into the transport path perpendicular to the transport direction or is pivoted in to the side in order to remove the foreign object recognized as faulty from the transport path .
  • FIG. 1 shows a partial area of an embodiment variant of a packaging system according to the invention in a perspective and schematic representation.
  • FIG. 2 shows a partial area of the packaging system according to FIG. 1 in a side schematic illustration.
  • Figures 3 and 4 each show details of a transition area between a film wrapping module and a shrink module of the packaging system in perspective.
  • Fig. 5 shows a shrink device in perspective and schematic representation, which can form a shrink module of the packaging system.
  • FIG. 6 shows a side and schematic representation of a shrink device which can form a shrink module of the packaging system.
  • Fig. 7 shows details of the inlet area of a further embodiment of a shrink device or a shrink module in a perspective schematic representation.
  • FIGS. 1 to 7 For elements of the invention that are the same or have the same effect, the same reference numerals are used in FIGS. 1 to 7 whenever possible. Furthermore, for the sake of clarity, only those reference symbols are shown in the individual figures that are necessary for the description of the respective figure. The illustrated embodiments are only examples, such as the device according to the invention or the method according to the invention can be designed and do not represent a final limitation.
  • FIG. 1 shows a partial area of a packaging system 1 in a perspective representation
  • FIG. 2 shows a partial area of a packaging system 1, in particular a packaging system 1 according to FIG. 1, in a side view.
  • Figures 3 and 4 each show details of a transition area between a film wrapping module 2 and a shrink module 3 in perspective.
  • the two schematic detailed views of FIGS. 3 and 4 each show sections of the packaging system 1 shown in a larger context in FIGS. 1 and 2.
  • FIGS. 5 and 6 each show a shrink device which can form a shrink module 3 of a packaging system 1, but can optionally also be used on its own.
  • FIG. 7 also shows details of the inlet area of a further embodiment of a shrinking device or a shrinking module 3 to be described in more detail below in a perspective illustration.
  • Pre-grouped article assemblies are fed to the film wrapping module 2 in a transport direction TR. These are prepared and compiled accordingly in a grouping module (not shown) of the packaging system 1, for example.
  • the article compilations each include a number of articles in a defined arrangement with respect to one another, which articles are subsequently combined into packaging units, in particular shrink-film packs, by means of a shrink film.
  • a suitable cut of shrink film is wrapped around the respective article combinations, so that at least the top, the bottom and two opposing side surfaces of the respective article combination are covered by the shrink film.
  • the shrink film not shown in detail here, which is placed or wrapped around the article assemblies in the film wrapping module 2, can usefully have been appropriately cut to length beforehand after it has been removed from an endless film supply and conveyed to the film wrapping module 2. This cutting to length to a suitable shrink film blank length can take place by means of a cutting device not shown in detail here.
  • the articles are preferably containers or containers, in particular empty or filled beverage containers such as bottles or cans.
  • the bottles can be formed by PET containers or containers made of mineral glass, etc., for example.
  • Particularly suitable cans are those made of metal, such as a suitable aluminum alloy.
  • the article assemblies wrapped in this way with suitably cut-to-length sections of the shrink film are fed further in the transport direction TR to a shrink module 3 with a shrink tunnel 4 and a transport device 5.
  • a shrink medium for example hot air or the like, is applied to the article combinations wrapped with shrink film.
  • the shrinkage temperature applied by the shrink medium to the shrink film and transferred via the temperature-controlled shrink medium to the article assemblies wrapped with shrink films causes the shrink film to shrink according to its specific film properties and to lie against the outward-facing outer surface of the articles of the article assembly, whereby the packaging units or shrink film bundles are formed will.
  • the shrink tunnel 4 which essentially serves to control the temperature of the article assemblies wrapped in shrink film, has an inlet opening 6 for the article assemblies wrapped in shrink film and an outlet opening 7 for the packaging units formed within the shrink tunnel.
  • the shrink module 3 can also have fans 8 downstream of the shrink tunnel 4, which blow cooler or cold air from above and / or from below and / or from the side onto the packaging units emerging from the shrink tunnel 4 in order to accelerate the cooling and solidification of the shrink film before the packaging units are sent for further handling.
  • the packaging units are then preferably fed to further handling modules (not shown) of the packaging system 1 for further handling.
  • further handling modules not shown
  • a stackable layer arrangement is assembled from a plurality of packaging units in a layer formation module, and the palletizable layer arrangements are then stacked on top of one another in a palletizing module and thus combined to form larger storage and transport units.
  • These larger storage and transport units can in particular be formed by pallets with several layer arrangements stacked on them.
  • the shrink module 3 is also assigned at least one first detection device 10, which is designed to detect parameters of the objects entering the shrink tunnel 4 of the shrink module 3, in particular article combinations wrapped with the shrink film and / or foreign objects.
  • the at least one first detection device 10, viewed in the transport direction TR, is preferably arranged in front of the entry opening 6 of the shrink tunnel 4, so that the article assemblies wrapped with shrink film or any foreign objects located on the transport device 5 are detected by the first detection device 10 before they enter the shrink tunnel 4 come in.
  • the at least one first detection device 10 can also be arranged in the area of the inlet opening 6 or, if necessary, even adjacent to the inlet opening 6 within the shrink tunnel 4.
  • the foreign objects to be detected by the detection device 10 are, for example, individual articles, individual shrink film sections, article assemblies incorrectly wrapped in shrink film, their shape due to an incorrect number of articles or articles that have fallen over within the assembly, or the like does not correspond to the desired shape, etc.
  • the foreign objects can also be formed by objects that have no connection with the formation of the container, with the wrapping of the article combinations and / or with the shrinking process.
  • the at least one first detection device 10 can be designed to detect the shape and / or size or the like of objects located on the transport device 5.
  • the recorded parameters provide information as to whether the recorded object is a correctly formed one encased in shrink film Article compilation or whether it is an undesired foreign object, which can lead to disruptions in the production process.
  • the first data or signals captured by the first capture device 10 are transmitted to a control / computer unit 11 assigned to the shrink module 3, which processes the signals supplied by the at least one first capture device 10 in order to detect foreign objects, in particular on the transport device 5.
  • FIG. 4 shows details of an embodiment of a first detection device 10, which is designed as a light barrier arrangement 13 and in particular comprises a transmitter 14 and a receiver 15, which are arranged opposite one another on the transport device 5.
  • the transmitter 14 is formed by a light beam source and the receiver 15 is formed by a corresponding light sensor.
  • the receiver 15 of the light barrier arrangement 13 detects an interruption of the light beam emanating from the transmitter 14, as a result of which an electrical signal is generated. This electrical signal varies depending on the size and shape of the object.
  • the electrical signal is transmitted to the control / computer unit 11 (compare FIGS. 1 and 2).
  • This contains, in particular, information on the size and shape of a correctly designed article combination wrapped in shrink film and / or on the size and shape of a correctly designed packaging unit.
  • discrepancies can be recognized.
  • the determined deviation indicates that there is a foreign object or a disruptive object on the transport device 5.
  • the control / computer unit 11 can contain further information, for example information on the size and shape of the individual items. Thus, according to one embodiment, it may be possible to determine the type and configuration of the foreign object or interfering object, for example whether it is a question of individual, possibly fallen over articles or sections of shrink film or the like.
  • the light barrier arrangement 13 is used to count the number of those encased with shrink film that enter the shrink tunnel 4 Article compilations.
  • the light barrier arrangement 13 monitors each object entering the shrink tunnel 4 and detects deviations which do not match the properties of the shrink-wrapped article combinations.
  • an ultrasonic detection unit can also be used in the present context, since this is also able to detect objects and to differentiate between article assemblies properly wrapped with shrink film sections from foreign objects or from improperly wrapped article groups.
  • Other variants are conceivable, in particular with regard to the sensor principles used.
  • a comparable other sensor system that does not work with light is usually included.
  • This can also include, for example, object detection by means of image evaluation based on camera signals.
  • correction mechanisms are activated which serve to remove the foreign object from the transport device 5 before it is in the shrink tunnel 4 of the Shrink module 3 enters. This is only possible if the first detection device 10 is arranged upstream (or upstream) of the shrink tunnel 4 in the transport direction TR, i.e. in front of the entry opening 6 into the shrink tunnel 4.
  • the entrance of the shrink tunnel 4 is closed in order to prevent the foreign objects recognized as faulty from entering the shrink tunnel 4 (see also FIG. 7).
  • the foreign object identified as defective can be diverted in front of the shrink tunnel 4 of the shrink module 3.
  • a suitable slide or a pusher element in the form of a bar extending parallel to the transport direction TR can be provided, which is pushed into the transport path perpendicular to the transport direction TR above the transport surface formed by the transport device 5 or is pivoted in to the side, in order to remove the foreign object recognized as defective from the transport device 5 and thus from the product flow of the packaging units.
  • the control / computer unit 11 can be formed, for example, by a machine controller 16 of the packaging system 1, which controls, monitors and / or coordinates a majority or all of the modules of the packaging system 1 and, in particular, which monitors and controls product tracking within the entire packaging system 1.
  • a machine controller 16 of the packaging system 1 which controls, monitors and / or coordinates a majority or all of the modules of the packaging system 1 and, in particular, which monitors and controls product tracking within the entire packaging system 1.
  • the distances between the article assemblies encased with shrink film and entering the shrink tunnel 4 are queried. If there is another object within the distance, it must be an error or a foreign object and a corresponding error message is generated. This can be output optically and / or acoustically, for example via a suitable control panel or the like, so that the operating personnel are warned and can take appropriate corrective measures.
  • At least one second detection device 12 downstream of the at least one first detection device 10, at least one second detection device 12 can additionally be provided, which is arranged in particular in the region of the outlet opening 7 or the outlet opening 7 upstream within the shrink tunnel 4 or downstream of the outlet opening 7 outside the shrink tunnel 4.
  • the at least one second acquisition device 12 is for the acquisition of parameters from the Shrink tunnel 4 expiring packaging units processed into shrink film packs are provided.
  • the second acquisition device 12 acquires the shape and / or size or the like of objects located on the transport device 5 and transmits the acquired data to the control / computer unit 11 and / or the machine control 16.
  • the at least one first detection device 10 and / or the at least one second detection device 12 are preferably each formed by a sensor device which is used to determine time-based signals.
  • signals are detected by the first detection device 10 that establish a relationship between a conveying speed of the transport device 5 and a time interval for an article assembly wrapped in shrink film which passes the first detection device 10 and enters the shrink tunnel 4 of the shrink module 3.
  • the second detection device 12 which is also designed as a sensor device, can detect signals that establish a relationship between the conveying speed of the transport device 5 and a time interval for a packaging unit passing the second detection device 12 and exiting the shrink tunnel 4 of the shrink module 4.
  • the first detection device 10 and / or the second detection device 12 are each formed by a light barrier arrangement 13, an ultrasonic sensor, a mechanically operating sensor, a proximity sensor or a camera.
  • the control / computer unit 11 compares, for example, the data transmitted by the first acquisition device 11 and the second acquisition device 12 and checks them for plausibility. It is recognized, for example, when individual objects, in particular foreign objects, have remained inside the shrink tunnel 4 because, for example, individual articles have got behind the shaft walls within the shrink tunnel or because shrink film is glued to the transport device. In this case, an error message is generated which requests the operator of the packaging system 1 to inspect the shrink tunnel 4 and, if necessary, to remove foreign objects from it. If necessary, it can also be provided that a System stop is triggered in order to avoid damage within the packaging system 1.
  • the second detection device can also work according to the optical principle, by means of an ultrasound detection principle and / or by means of image evaluation.
  • FIG. 7 shows details of the inlet area of a further embodiment of a shrink module 3 in a perspective illustration.
  • a possible correction or protection mechanism is shown here, which can be activated by a correspondingly generated error message by the control / computer unit 11 or the machine control 16.
  • This is in particular a vertically movable bulkhead 17 with which the inlet opening 6 of the shrink tunnel 4 can be closed in order to prevent the foreign object recognized as being defective from entering the shrink tunnel 4.
  • an at least temporary stopping of the transport device 5 and / or the entire packaging system 1 is preferably provided so that the foreign object can be removed, for example by appropriate operating personnel.
  • the shrink module 3 is followed by further handling and / or treatment stations or handling modules (not shown) for the packaging units, which are coupled to the shrink module 3 via the transport device 5 or further conveying devices.
  • the further handling modules are signal-technically and / or control-technically connected to the control /
  • Computer unit 11 of the shrink module and / or the machine control 16 of the packaging system 1 are coupled.
  • a coupling is provided so that when error signals occur, which were determined in particular on the basis of the data or signals recorded by the first detection device 10 and / or the second detection device 12 of the shrink module 3, the subsequent handling modules can be controlled in a modified manner.
  • the subsequent handling modules are deactivated or stopped at least for a short time until the source of the error has been eliminated. This prevents, for example, incorrect layer patterns for palletizing or the like from being generated due to missing packaging units.

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

Abstract

L'invention concerne un dispositif de conditionnement sous film rétractable (3) destiné notamment à la production de lots de marchandises sous forme de packs sous film rétractable constitués d'un groupe d'articles enveloppés d'un film rétractable, ainsi qu'une installation d'emballage et un procédé de production d'unités d'emballage sous forme de packs sous film rétractable. Le dispositif de conditionnement sous film rétractable (3) comprend au moins un équipement de transport (5) destiné au transport de groupes d'articles enveloppés sous film rétractable dans une direction de transport (TR) en passant par un tunnel de rétraction (4) du dispositif de conditionnement sous film rétractable (3). En outre, au moins un premier système de détection (10) destiné à la détection de paramètres du dispositif de conditionnement sous film rétractable des groupes d'articles entrant dans le tunnel de rétraction (4) du dispositif de conditionnement sous film rétractable (3) et enveloppés d'un film rétractable. Une unité de commande/calcul (11) traite les premières données ou premiers signaux fourni-e-s par l'au moins un système de détection (10) pour identifier les objets, notamment les groupes d'articles enveloppés d'un film rétractable et/ou les objets étrangers présents dans le dispositif de conditionnement sous film rétractable (3).
PCT/EP2021/062276 2020-06-26 2021-05-10 Dispositif de conditionnement sous film rétractable, installation d'emballage et procédé de production de lots de marchandises WO2021259547A1 (fr)

Applications Claiming Priority (2)

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DE102020207933.1A DE102020207933A1 (de) 2020-06-26 2020-06-26 Schrumpfvorrichtung, Verpackungsanlage und Verfahren zur Herstellung von Verpackungseinheiten
DE102020207933.1 2020-06-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211555A1 (de) 2022-11-01 2024-05-02 Beiersdorf Aktiengesellschaft Verfahren zur Ummantelung von Behältern mit Schrumpffolie oder Schrumpfschlauch und Vorrichtung dazu

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022122553A1 (de) 2022-09-06 2024-03-07 Krones Aktiengesellschaft Verfahren zur Steuerung einer Verpackungsanlage und Verpackungsanlage
WO2024160630A1 (fr) * 2023-01-31 2024-08-08 Haver & Boecker Ohg Système, procédé de fonctionnement d'un système et utilisation

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DE102007011526A1 (de) * 2007-03-09 2008-09-11 Khs Ag Schrumpftunnel
DE102011101116A1 (de) * 2011-05-09 2012-11-15 Khs Gmbh Verfahren zur Herstellung von Gebinden
EP2801533A1 (fr) * 2013-05-07 2014-11-12 Krones AG Dispositif et procédé de fabrication d'assemblages de récipient

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
DE102007011526A1 (de) * 2007-03-09 2008-09-11 Khs Ag Schrumpftunnel
DE102011101116A1 (de) * 2011-05-09 2012-11-15 Khs Gmbh Verfahren zur Herstellung von Gebinden
EP2801533A1 (fr) * 2013-05-07 2014-11-12 Krones AG Dispositif et procédé de fabrication d'assemblages de récipient

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022211555A1 (de) 2022-11-01 2024-05-02 Beiersdorf Aktiengesellschaft Verfahren zur Ummantelung von Behältern mit Schrumpffolie oder Schrumpfschlauch und Vorrichtung dazu

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