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EP3581505B1 - Gazéification indépendante du niveau de remplissage - Google Patents

Gazéification indépendante du niveau de remplissage Download PDF

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Publication number
EP3581505B1
EP3581505B1 EP19168500.7A EP19168500A EP3581505B1 EP 3581505 B1 EP3581505 B1 EP 3581505B1 EP 19168500 A EP19168500 A EP 19168500A EP 3581505 B1 EP3581505 B1 EP 3581505B1
Authority
EP
European Patent Office
Prior art keywords
volume
packaging
gas
pressure
partial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19168500.7A
Other languages
German (de)
English (en)
Other versions
EP3581505A1 (fr
Inventor
Michael RÄDLER
Florian Felch
Alexander STÖTZNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multivac Sepp Haggenmueller GmbH and Co KG
Original Assignee
Multivac Sepp Haggenmueller GmbH and Co KG
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 Multivac Sepp Haggenmueller GmbH and Co KG filed Critical Multivac Sepp Haggenmueller GmbH and Co KG
Publication of EP3581505A1 publication Critical patent/EP3581505A1/fr
Application granted granted Critical
Publication of EP3581505B1 publication Critical patent/EP3581505B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/006—Adding fluids for preventing deformation of filled and closed containers or wrappers
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
    • 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
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • 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
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • 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 producing packs with pack optics that are at least substantially similar to one another according to claim 1.
  • Figure 1 shows a sealing station 3 'designed for gassing evacuated packaging, which is present, for example, as part of a deep-drawing packaging machine.
  • a sealing station 3 designed for gassing evacuated packaging, which is present, for example, as part of a deep-drawing packaging machine.
  • a total packaging volume P ' (hereinafter also: pack volume P') is gassed, which is the sum of a partial volume V1 'formed by the respective packaging trays 14' minus the product contents 22 'present, as well as of a partial volume V2 ', which is present above the respective packaging trays 14' and is enclosed by the upper film 10 '.
  • the total packaging volume P ' is designed to be overall larger than the totality of the respective individual volumes enclosed by the packaging ultimately produced.
  • This in Figure 1 The total packaging volume P 'shown is used for gas distribution between the packaging. This results in a certain gap S 'between the lower and upper film material, via which the supplied gas can be distributed in all the packs positioned within the sealing station.
  • the packs positioned within the sealing station 3 ' are conventionally gassed to a target gas pressure.
  • the upper film material is pressed in the direction of the lower film material after the gassing process. This has the consequence that the amount of gas contained in the partial volume V2 'with the gassing target pressure is pressed into the partial volume V1', so that the pressure rises above the gassing target pressure in the partial volume V1 '.
  • a packaging has a high fill level (hereinafter also: filling level)
  • filling level a pressure is established in the packaging that is significantly above the target gas pressure.
  • a pack then acts inflated when the target gas pressure generated initially in the total packaging volume corresponds approximately to atmospheric pressure.
  • WO 2014/056 806 A1 discloses a sealing station which can be used on a packaging machine for producing sealed packages with a modified atmosphere (MAP).
  • MAP modified atmosphere
  • the object of the invention is to produce a method for producing packs with pack optics that are at least substantially similar to one another. This should be possible even if the respective packs have varying degrees of filling, i.e. are filled unevenly in terms of volume.
  • the target gas pressure generated in a respective work cycle in the packaging volume of the packaging (s) left free from products is reduced to a lower pressure level by releasing a detectable portion of the previously supplied gas while maintaining the packaging volume, so that when the subsequent, preferably slow, depression of the Upper film material a re-increase to the gassing target pressure is possible when the upper film material reaches the end position provided for completing the packaging, that is, the package volume is reduced by the imaginary partial volume.
  • the filling of the package volume to the target gassing pressure and the targeted release of the partial amount of gas to create a reduced pressure level within the package volume can be detected using a pressure sensor connected to the package volume.
  • the essence of the invention is, for each work cycle, the free, i.e. minus the respective product volumes, available pack volume of one or more packs positioned in the sealing station to initially be gassed to the target gas pressure and then a subset of the initially supplied gas from the imaginary subvolume, which can be predetermined according to physical principles in order to drain the pack volume later when the upper film material is pressed down.
  • the amount of gas of the partial volume is discharged into the collecting container, which would otherwise be in accordance with Figure 1 closed present packing volume would be compressed.
  • the imaginary plane simultaneously forms an imaginary system limit as a reference for the fact that the amount of gas contained after filling above the system limit, within the imaginary and calculable partial volume, is to be released, whereby the pressure within the packing volume falls as an intermediate step.
  • the subsequent volume reduction by lowering the upper film material to the system limit then leads to the restoration of a gas atmosphere to the target gas pressure level, so that sealing can then take place.
  • a filling of the respective packaging adapted to the respective degree of filling to the target gas pressure is automatically simulated by the fact that, in particular when the degree of filling varies per working cycle, the amount of gas within the imaginary partial volume, which is still used at the beginning of the method as an aid for gas distribution is required between the respective packaging, is discharged to the collection volume after the fumigation process.
  • the amount of gas that is contained within the imaginary, calculable partial volume at the target gassing pressure can be discharged in a controlled manner into the known collection volume, which in turn has a definable initial pressure.
  • the partial amount of the gas filled into the packing volume, which is discharged via the line, is preferably directed into a collection volume enclosed at least partially by an upper tool part of the sealing station and / or the upper packaging material.
  • the collection volume is provided directly in the upper tool part of the sealing station, that is to say integrated therein, which leads to an advantageous, compact construction of the sealing station for the method according to the invention.
  • the collection volume and the imaginary partial volume can easily be calculated using known geometries of the structure of the upper part of the tool, which means that the partial amount of gas can be released into the collection volume without any technical problems.
  • An alternative variant of the invention provides that the partial amount of the gas filled into the packing volume which is let off via the line is passed into a separate collecting container forming the collecting volume.
  • the collecting container thus serves as a separate reference volume, so that a format change and any associated tool change can be carried out particularly easily without influencing the machine program.
  • a target pressure for the collection volume is determined on the basis of the partial amount of gas that has been discharged, until the line remains open until it is reached.
  • the pressure prevailing in the collecting volume is detected by means of a pressure sensor connected to it. This would allow the draining process to be precisely controlled and better timed to be integrated into further process steps. A preset time fixation, possibly resulting in "dead times", for releasing the partial amount of gas is then not necessary.
  • Process control of the discharge process based on the target pressure on the collection volume can be carried out very precisely by means of simple control and regulation technology that may already be present on the machine and leads to an optimization of the entire manufacturing process because of the associated dead time minimization.
  • the pressure generated within the collection volume by the gas fed into it remains lower during the entire discharge process than the pressure applied within the packing volume to the remaining amount of gas there, so that the packing volume remains stable even after the discharge process. This ensures a high process stability, in particular a high process manufacturing quality.
  • An advantageous embodiment provides that the upper packaging material is moved into the end position by means of a ventilation process and / or by means of at least one device executing a lifting movement.
  • a ventilation process and / or by means of at least one device executing a lifting movement.
  • such a process is controlled in such a way that the upper packaging material is moved so slowly into the end position that the residual amount of the filled gas remaining within the packaging volume after the discharge process can be distributed over all the packaging positioned within the sealing station.
  • the respective packagings can be manufactured to be optically identical to one another.
  • the upper packaging material is preferably sealed with the lower packaging material along an edge region, so that the finished packaging encloses a desired atmosphere in an airtight manner.
  • An advantageous variant provides that the packing volume is evacuated before filling with gas. As a result, a desired atmosphere can be created very precisely within the respective packaging through the subsequent process steps.
  • the lower packaging material could be planar, ie not formed, fed to the sealing station and clamped together with the upper packaging material.
  • the volume ratio can be determined from the recorded balanced pressure with prior knowledge of the total volume (consisting of the collecting volume and the partial volume). Consequently, their respective volumes also result.
  • the method according to the invention can be used in the production of visually comparable packagings with a predetermined, approximately constant filling level for the precise and simple automated determination of an offset pressure, the offset pressure being a difference between the gas injection pressure and that after the partial amount of gas has been released the imaginary partial volume is determined within the packing volume, so that with subsequent machine cycles, the packing volume is only filled with gas until the pressure is reached, which results from the gassing target pressure minus the determined offset pressure.
  • the method according to the invention could advantageously be used at least at the beginning of the production process to determine the offset pressure, while the draining process is then dispensed with for this product batch.
  • This process could also be repeated at intervals during production for the purpose of an offset printing update, which may further improve the production quality.
  • a sealing station of a packaging machine which is in particular in the form of a thermoforming packaging machine, is suitable for carrying out the invention, the sealing station having a line which connects a packaging volume enclosed between a lower and an upper packaging material at least one packaging positioned within the sealing station with a collection volume, whereby the line is intended to discharge a predetermined portion of a gas previously filled into the packing volume into the collecting volume.
  • the entire package volume is initially filled with a filling gas provided for a desired atmosphere to a target pressure, which is also later used in the ready-made, but with respect to the total package volume reduced packaging should be included.
  • the initially filled packaging volume consists of a first partial volume, which is formed by the spaces left free by the inserted products in the lower preformed packaging material, and a second partial volume, enclosed above the first partial volume and enclosed by the upper packaging material for the purpose of uniform gas distribution.
  • the amount of gas contained in the second partial volume is discharged via the line to the collection volume, so that the pressure prevailing in the maintained packing volume decreases in the meantime, but then by reducing the packing volume by the second partial volume designed for gas distribution to the desired packaging dimension back to the originally generated Target pressure increases.
  • sealing station By means of such a sealing station, packagings with a pack optics that are at least substantially similar to one another can be produced with possibly varying degrees of filling. Furthermore, the sealing station is suitable for carrying out a test run of the type described above.
  • the pressure level currently prevailing in the packing volume can be recorded for the purpose of gas supply and / or gas discharge control in the collecting volume by means of a pressure sensor connected to the packing volume.
  • the line is preferably provided with a valve, in particular a 2/2 valve, which can be closed in order to limit the predetermined partial amount of gas to be released into the collecting volume.
  • the valve can be switched process-controlled on the basis of a pressure value detection in the collecting volume, so that the partial amount of gas is precisely discharged.
  • a pressure sensor can be connected to a section of the line leading to the collecting volume.
  • One variant provides that a volume flow can be controlled by means of the valve. This makes it possible, in particular, to control the discharge process of the partial amount of gas with a high level of process stability.
  • At least one section of the line is preferably also provided for evacuating and / or gassing the packing volume.
  • the line fulfills a multiple function and can be integrated in a compact manner at the sealing station, if necessary using existing line systems.
  • a particularly compact design is given when the collecting volume is formed within an upper tool part of the sealing station.
  • the collecting volume is formed by a separate collecting container of the sealing station.
  • Figure 1 shows a schematic representation of a sealing station 3 'according to the prior art.
  • the sealing station 3 ' has an upper tool part 20' as well as a lower tool part 21 'which can be brought up to the upper tool part 20' by means of a lifting movement and is designed to receive preformed packaging trays 14 '.
  • packaging trays 14 ' are products 16' with different degrees of filling 22 'added.
  • the packaging trays 14' together with an upper film 10 ', enclose an airtight packaging volume P', which consists of a partial volume V1 'and a partial volume V2'.
  • the partial volume V1 ' is composed of the sum of the respective packaging tray volumes created by the packaging trays 14' and released by the products 16 '.
  • the partial volume V2 ' forms an imaginary partial volume which is enclosed between the upper film 10' and an imaginary plane E 'shown in dashed lines.
  • a connecting gap S' is formed above the two packaging trays 14 ', which allows a distribution of the gas within the packaging volume V' in particular during the filling process.
  • a sealing unit 25' is positioned for a sealing process, which is designed to move the upper film 10 'for a sealing process in the direction of the packaging trays 14' positioned below by means of a lifting movement H '.
  • the packing volume P ' consisting of the sum of the respective sub-volumes V1' and V2 ', p a Begasungssolltik should filled with a gas to provide a desired atmosphere.
  • the amount of gas contained in the partial volume V2 ' is pressed into the partial volume V1' released by the products 16 'within the packaging trays 14'. Since the respective degrees of filling 22 'of the packaging trays 14' are different, there is also a different final pressure within the finished packaging V '. This means that the packs V 'cannot be produced with pack optics that are at least essentially similar to one another.
  • FIG. 2 shows a schematic view of a packaging machine 1, which is designed in the form of a thermoforming packaging machine T.
  • the packaging machine 1 has a forming station 2, a sealing station 3, a cross-cutting device 4 and a longitudinal cutting device 5. These are arranged in this order in a working direction R on a machine frame 6.
  • a feed roller 7 is arranged, from which a lower film U is pulled off as the lower packaging material 8.
  • the lower film U is transported into the forming station 2 by means of a feed device (not shown).
  • packaging trays 14 are formed in the lower film U by means of the forming station 2.
  • the packaging trays 14 are then transported on to an insertion section 15, where they can be filled with a product 16 manually or automatically. Following the insertion section 15, the packaging trays 14 filled with the products 16 are transported on to the sealing station 3.
  • the packaging trays 14 can be sealed with an upper film O, which forms an upper packaging material 10, so that by sealing the upper film O onto the packaging trays 14, closed packs V are produced, which are separated with the cross-cutting device 4 and the longitudinal cutting device 5 and can be transported away by means of a discharge device 13.
  • Figure 3 shows schematically a sealing station 3 as it is at the in Figure 2 packaging machine 1 shown can be used.
  • the sealing station 3 comprises an upper tool part 20 and a lower tool part 21, which enclose a sealing chamber 23.
  • Figure 3 further shows that two packaging trays 14 with respective products 16 are received in the lower tool part 21, the respective filling levels 22 of the packaging trays 14 differing.
  • the packing volume V is traversed by means of an imaginary plane E shown in dashed lines, as a result of which it is divided into a partial volume V1 and a partial volume V2.
  • Figure 3 the partial volume V2 enclosed by the upper film O and the imaginary plane E is connected via a line 26 to a collecting volume V3 integrated in the upper tool part 20, which is enclosed between the upper tool part 20 and the upper film O.
  • the packing volume P is filled via a section 26a of the line 26 with a gas G to create a desired atmosphere to a set gas pressure p setpoint.
  • the section 26a has an inlet valve 37a that can be controlled using a pressure sensor 38a.
  • the pressure sensor 38a is designed to detect the pressure level within the package volume P.
  • a subset TM contained within the subvolume V2 (see Figure 5 ) of the gas G brought to the set gas pressure p setpoint is withdrawn from the packing volume P via line 26.
  • the gas G is fed into the collecting volume V3 via sections 26a, 26b, 26c of the line 26.
  • the partial amount TM of the discharged gas G corresponds to the mass of the gas which is contained in the partial volume V2.
  • the section 26b has a (discharge) valve 27 that can be controlled using a further pressure sensor 48a.
  • the pressure sensor 48a is designed to detect the pressure level within the collecting volume V3.
  • Section 26c is also present as a ventilation line which has a ventilation valve 47a.
  • the package volume P i.e. the valve 27 of the discharge line 26 is closed and the upper film O is pressed in the direction of the packaging trays 14 positioned below by means of the sealing unit 25.
  • the upper film O is brought into an end position L positioned in accordance with the imaginary plane E, in which the upper film O is sealed onto the packaging trays 14.
  • the lowering of the upper film O can be controlled so slowly by means of the sealing unit 25, in particular a plate-shaped device 28 that can be lowered thereon, and / or by means of a ventilation process that the residual amount RM contained within the package volume P is slowly distributed over the respective packages V.
  • the device 28 is designed as a product protection plate and is configured to prevent an undesired introduction of heat onto the products 16 received within the packaging trays 14 during the sealing process.
  • FIG 4 shows the sealing station 3 according to Figure 3 , a separate collecting container 30 being used as collecting volume V3.
  • a separate ventilation line 26d which has a ventilation valve 47b, is connected to the sealing chamber 23.
  • the line 26 includes the valve 27 in its section 26b, which is opened for the discharge process so that the partial amount TM of the gas G can flow from the packing volume P into the collecting volume V3.
  • the valve 27 remains closed.
  • the valve 27 remains closed if the filling process is preceded by an evacuation process of the package volume P.
  • the draining process via the valve 27 can according to FIG Figure 4 can be controlled by means of a pressure sensor 48b connected to the collecting volume V3.
  • the filling process takes place via an inlet valve 37b, which is pressure-controlled by means of a pressure sensor 38b connected to the packing volume P.
  • Figure 5 shows the principle of the process according to the invention.
  • the packing volume P is filled with the desired gas G to the target gas pressure p setpoint. There is then a predetermined, to the p Begasungssolldruck corresponding amount of gas in the packing volume GM P.
  • the amount of gas contained within the imaginary partial volume V2 (partial amount TM), which is present above the imaginary plane E drawn in as the system boundary, is transferred to the Figures 3 and 4th line 26 shown drained.
  • the residual amount RM of the gas G still remaining within the packing volume P is distributed over the entire packing volume P so that a reduced pressure level p red is present within the packing volume P maintained.
  • packaging volume P is reduced by the imaginary partial volume V2 in that the upper packaging material is pressed down into the end position L falling on the imaginary plane E. It is now again the Begasungssolldruck p set within the laid down for finished packaging V partial volume V1 before. According to this process, packaging can be produced with packaging optics that are at least essentially similar to one another, regardless of the degree of filling.
  • the ratio of the partial volume V2 and the collection volume V3 can be determined by means of a test run that can be carried out using the sealing station 3.
  • the test run could, for example, be carried out in such a way that the lower film U used for the packaging trays 14 is not introduced into the sealing station 3 in a molded form and is inserted therein together with the Upper film O is fixed.
  • the partial volume V2 is gassed to the gassing set pressure p soll . If the line 26 is then opened and left open until the pressure equals the partial volume V2 and the collecting volume V3, the ratio of the partial volume V2 to the collecting volume V3 can be calculated from the pressure that is established.
  • the respective volumes of the partial volume V2 and the collection volume V3 can then be calculated directly from the total volume, consisting of the partial volume V2 and the collection volume V3.
  • the partial volume V2 could also be estimated approximately via a stroke carried out by the sealing unit 25.
  • the respective volumes V2 and V3 could also be calculated using clearly known reference volumes when the machine is started up.
  • the volumes used in connection with the principle according to the invention i.e. the partial volume V2 and the collection volume V3, can expediently be stored in a tool database of the packaging machine 1 and are used as calculation variables during the packaging process.
  • the principle according to the invention can be used for the automated generation of an offset print.
  • the invention could just as well be carried out at a sealing station which is part of a packaging machine which is not designed as a thermoforming packaging machine, for example a tray closing machine with a supply of already prefabricated packaging trays.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Vacuum Packaging (AREA)

Claims (10)

  1. Procédé permettant de faire fonctionner un poste de scellage (3) d'une machine d'emballage (1) afin de produire des emballages (V) présentant un effet visuel d'emballage au moins essentiellement similaire les uns par rapport aux autres pour des degrés de remplissage (22) éventuellement différents, comprenant les étapes ci-dessous consistant à :
    • remplir un volume d'emballage (P) enfermé entre des matériaux d'emballage inférieur et supérieur (8, 10) d'au moins un emballage (V) positionné à l'intérieur du poste de scellage (3) avec un gaz (G) destiné à créer une atmosphère souhaitée à pression de gazage cible (psoll) prédéterminée pour un emballage fini (V),
    • purger hors du volume d'emballage (P) une quantité partielle (TM) du gaz (G) introduit dans le volume d'emballage (P) par l'intermédiaire d'une conduite (26) raccordée audit volume d'emballage jusque dans un volume de collecte (V3) relié à ladite conduite tout en conservant le volume d'emballage (P) généré grâce au remplissage précédent, de sorte qu'une pression (pred) réduite par rapport à la pression de gazage cible est établie à l'intérieur du volume d'emballage (P) pour la quantité restante (RM) du gaz (G) introduit,
    dans lequel la quantité partielle (TM) purgée du gaz (G) correspond essentiellement à la masse du gaz (G) réceptionné à l'intérieur d'un volume partiel imaginaire (V2) du volume d'emballage (P), lequel volume partiel imaginaire (V2) est encadré par un plan imaginaire (E), traversant le volume d'emballage (P) et incluant au moins une partie d'un bord (40) du matériau d'emballage inférieur (8), et par le matériau d'emballage supérieur (10), et
    • réduire le volume d'emballage (P) jusqu'alors préservé à concurrence du volume partiel imaginaire (V2) en déplaçant le matériau d'emballage supérieur (10) jusque dans une position finale (L) aboutissant essentiellement sur le plan imaginaire (E), de sorte que la pression (pred) à l'intérieur de l'emballage augmente à nouveau jusqu'à la pression de gazage cible (psoll).
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité partielle (TM), purgée par l'intermédiaire de la conduite (26), du gaz (G) introduit dans le volume d'emballage (P) est acheminée dans un volume de collecte (V3) au moins partiellement encadré par une partie supérieure d'outil (20) du poste de scellage (3) et/ou le matériau d'emballage supérieur (10).
  3. Procédé selon la revendication 1, caractérisé en ce que la quantité partielle (TM), purgée par l'intermédiaire de la conduite (26), du gaz (G) introduit dans le volume d'emballage (P) est acheminée dans un récipient de collecte (30) séparé qui détermine le volume de collecte (V3).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une pression cible, à laquelle la conduite (26) reste ouverte lorsqu'elle est atteinte, est déterminée pour le volume de collecte (V3) en se basant sur la quantité partielle (TM) purgée du gaz (G).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pression générée à l'intérieur du volume de collecte (V3) par le gaz (G) qui y a été acheminé reste inférieure, pendant toute l'opération de purge, à la pression appliquée à la quantité restante (RM) du gaz (G) demeurant à l'intérieur du volume d'emballage (P), afin de préserver le volume d'emballage (P) pendant l'opération de purge.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau d'emballage supérieur (10) est déplacé jusque dans la position finale (L) au moyen d'une opération de ventilation et/ou au moyen d'au moins un dispositif (28) mettant en œuvre un mouvement de levage.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau d'emballage supérieur (10) est scellé dans la position finale (L) avec le matériau d'emballage inférieur (8).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le volume d'emballage (P) est mis sous vide avant le remplissage avec du gaz (G).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le volume partiel imaginaire (V2) et/ou le volume de collecte (V3) est/sont déterminé(s) au moyen d'un essai.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit procédé est utilisé pour la production d'emballages (V) avec un degré de remplissage (22) prédéterminé approximativement constant afin de déterminer une pression de décalage qui est déterminée à partir d'une différence entre la pression de gazage cible (psoll) et la pression (pred) encore présente à l'intérieur du volume d'emballage (P) après la purge de la quantité partielle (TM) du gaz (G) hors du volume partiel imaginaire (V2), de sorte que le volume d'emballage (P) n'est rempli avec du gaz (G), lors de cycles de machine ultérieurs, que jusqu'à ce que la pression (pred) soit atteinte, laquelle pression résulte de la pression de gazage cible (psoll) dont on retranche la pression de décalage déterminée.
EP19168500.7A 2018-06-14 2019-04-10 Gazéification indépendante du niveau de remplissage Active EP3581505B1 (fr)

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DE102018114263A1 (de) 2019-12-19
US11511896B2 (en) 2022-11-29
EP3581505A1 (fr) 2019-12-18
US20190382147A1 (en) 2019-12-19

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