EP3587285B1 - Procédé de détermination du débit volumétrique et du degré de remplissage sur une machine d'emballage - Google Patents

Procédé de détermination du débit volumétrique et du degré de remplissage sur une machine d'emballage Download PDF

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Publication number
EP3587285B1
EP3587285B1 EP19178020.4A EP19178020A EP3587285B1 EP 3587285 B1 EP3587285 B1 EP 3587285B1 EP 19178020 A EP19178020 A EP 19178020A EP 3587285 B1 EP3587285 B1 EP 3587285B1
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EP
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Prior art keywords
pressure
volume
filling
package
packaging
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German (de)
English (en)
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EP3587285A1 (fr
Inventor
Florian Felch
Michael RÄDLER
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Multivac Sepp Haggenmueller GmbH and Co KG
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Multivac Sepp Haggenmueller GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • 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
    • 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
    • B65B31/021—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 the containers or wrappers being interconnected
    • 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
    • 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

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. Furthermore, the invention relates to a packaging machine for producing packs with pack optics that are at least substantially similar to one another according to independent claim 13.
  • the invention is in particular the following in connection with Fig. 1 problem described.
  • Fig. 1 shows a schematic representation of a sealing station S '.
  • the sealing station S ' comprises an upper sealing tool part SO' and a lower sealing tool part SU ', which can be brought together by means of a lifting movement H' to form an airtight sealed sealing chamber SK '.
  • an upper film O 'and a lower film U' are brought together within the sealing chamber SK 'in such a way that they enclose a packing volume P' between them, which is essentially the sum of a partial volume V1 'that is determined by the respective Packaging trays VM 'formed in the lower film U' minus the present product contents I ', as well as a partial volume V2' which is present above the respective packaging trays VM 'and is enclosed by the upper film O'.
  • the package volume P ' is designed to be overall larger than the totality of the respective individual volumes enclosed by the packages produced, so that gas can be distributed between the packages during the gassing in particular. Because of the in Fig. 1 Positioning of a sealing tool SW 'stored therein above the packaging troughs VM' positioned within the sealing station S ', a gap SP' between the lower and upper film U ', O', via which the supplied gas is in all of them, is shown, set back in the sealing tool upper part SO ' can distribute packaging positioned within the sealing station S '.
  • packaging with a varying pack appearance can be produced despite an optimized gassing process, for example using an adjustable stage throttle, because it happens again and again that doing that Packagings are produced which have different upper film curvatures, for example appear puffed or rather depressed.
  • optical deviations are caused in the sealing process by the lifting (lowering) of the sealing tool SW '. Since the sealing tool SW 'is initially positioned set back in the sealing tool upper part SO' during the gassing process in order to create the gap SP 'necessary for the distribution of the gas, the sealing tool SW' is then moved downwards for the sealing process in the direction of the packaging trough VM positioned below 'relocated, whereby it displaces the initially created partial volume V2'. By moving the sealing tool SW 'down, the gassed partial volume V2' is pressed into the partial volume V1 ', so to speak as an additional volume. As a result, the pressure in the packaging increases. Depending on the varying packaging contents I ', packaging with a varying packaging appearance is thereby created.
  • gassing offset printing previously had to be calculated manually during a setting process and entered as a calculation parameter on the packaging machine, so that its use is reserved for specially trained operating personnel.
  • the empty packaging then carried along then extremely falsifies the gassing and / or evacuation process, provided that rigidly preset process parameters are used. As a result, at least on the filled packaging processed together with the empty packaging in one work cycle, the desired appearance is not produced.
  • the EP 2 668 102 B1 discloses a packaging machine and a method for producing individually evacuated and / or gassed packaging. It is generally further disclosed that a means can be used with which the filling level of the packaged goods in the respective packaging tray and / or the fill quantity of the packaged goods within the respective packaging tray can be determined. Depending on this measurement signal, a shut-off device can then be regulated, for example, in order to individually regulate the volume of gas that is withdrawn from or supplied to the respective packaging tray.
  • the object of the invention is to produce a method and a device for producing packs with pack optics that are at least substantially similar to one another. This should be possible even if the respective packagings have varying degrees of filling, i. H. are voluminously unevenly filled.
  • a degree of filling of a "fume cupboard" provided within the sealing station ie the respective packaging processed per machine cycle in a work process at the sealing station, and possibly based on it, in adaptation to the respective fume cupboard the volume flow of the aeration medium is determined.
  • the essence of the invention is, at least temporarily, but preferably right at the beginning of the gassing process, to record the pressure curve on a respective trigger and to compare it with a reference pressure curve that is generated and recorded, for example, on a trigger from empty packaging Analysis, i.e. a comparison of the respective gradients of the pressure increases is possible, the degree of filling of the currently available fume cupboard, i.e. the packaging positioned within the sealing station, as well as possibly also a used and especially optimal volume flow of the gassing medium to calculate based on this the processing of the present deduction and / or at least one subsequent deduction in a process-controlled manner.
  • the invention therefore makes it possible that current filling level and / or volume flow values can be recorded and used per machine cycle as a basis for calculating at least one process parameter for the manufacturing process, be it at the sealing station itself and / or at other work stations of the packaging machine.
  • the comparison of the pressure curve with the reference pressure curve is carried out in good time, i.e. during a predeterminable time window at the beginning of the filling, that a filling level and / or a volume flow can be foreseen for the same discharge, so to speak in real time ( calculable) is that the process parameter can still be set during the remaining filling time, i.e. before a variable end-of-gas pressure is reached within the package volume.
  • the time window for the aforementioned comparison can be timed in such a way that the present print itself can still be influenced in a process-controlled manner based on the comparison made in this regard. Such an advantageous cascading can lead to a higher process accuracy.
  • the invention is based on process steps that can be carried out easily in order to better adapt the manufacturing process to possibly varying fill levels, with the result that an improved product quality, that is to say packs with pack optics that are at least substantially similar to one another, can be produced.
  • the invention is particularly suitable for the qualitative packaging of each target weight product with varying product volume, in particular for packaging fresh meat or cheese with varying product density. Even in the event that empty packaging is included in the product line for procedural reasons during the manufacturing process, its "empty contents" can be determined using the inventive method Optimally compensate for process steps so that even in the event of a withdrawal with empty packaging enclosed therein, packaging with the desired packaging appearance can be produced.
  • the degree of filling in particular to compare the recorded pressure profile with the reference pressure profile, it can be useful to assume an isothermal change in state with the same volume flow conditions, preferably with the same pressure ratios and possibly the same throttle valve position.
  • the derivation is preferably based on the Boyle-Mariotte law as the theoretical basis. It is particularly advantageous if, based on at least one process parameter preset at the sealing station (e.g. aeration temperature, volume flow, pressure ratio, throttle position for gassing, etc.), a corresponding reference pressure curve can be called up for carrying out the inventive method, so that the inventive method can be used to produce various Packaging types can be used.
  • An advantageous variant of the invention provides that a quotient of a ratio of a time recorded for the pressure profile and a time recorded for the reference pressure profile is subtracted from a whole in order to calculate the degree of filling.
  • a recording and / or calculation unit is preferably used, which may be an integral part of a control unit of the packaging machine is.
  • a variable time window can be selected for recording the pressure profile on the packaging machine.
  • a larger time window for recording the pressure profile could also be selected for longer-lasting gassing processes, because this enables a more precise prediction of the present degree of filling and / or volume flow to be carried out.
  • the time-based comparison with the reference pressure profile can take place during the gassing on the basis of a previously recorded and / or calculated time for the reference pressure profile.
  • a memory of the packaging machine preferably has at least one time-dependent reference pressure profile that is predetermined for the packaging format and with regard to which the filling level of the current print can be determined.
  • reference pressure profiles of different packaging formats can be kept ready for the process-controlled comparison so that the invention can be used for an optically homogeneous production of different packaging formats.
  • the comparison can be particularly meaningful if comparable process parameters, for example the same volume flows, are used to produce the reference pressure profile and the recorded pressure profile.
  • real-time is intended to mean that the automated adjustment of the process parameters takes place during the same work cycle, and in particular can also relate to a setting of the currently carried out gassing process, during which the filling level is determined.
  • the process parameter is an offset pressure that is still used in the current filling process and / or in at least one subsequent filling process in order to fill the package volume with gas only until a pressure is reached that results from a target gas pressure for finished packages minus the calculated offset printing results.
  • the offset printing could be adapted automatically at least at intervals, but preferably per machine cycle, so that varying fill levels can be better taken into account during production. It would then be possible, in particular, to continuously adapt the filling pressure to the detected filling levels, so that the subsequent sealing stroke inside the packaging precisely brings about the target gas pressure. As a result, optically equivalent packaging, i.e. packaging with the same target gas pressure, can leave the sealing station.
  • the Boyle-Mariotte law is expediently used to calculate the offset printing, taking into account a partial volume of the packaging volume displaced by a sealing stroke and a free packaging volume that can be determined in view of the calculated filling level, including the target gas pressure to be produced in finished packaging.
  • an isothermal pressure equalization between the packages that are positioned within the sealing station can be assumed.
  • the process parameter is preferably a gas velocity that is achieved at the respective gas pens designed to fill the packing volume.
  • This may be given the nature of the products, especially the nature of food products that placed in the packaging can be useful. For example, it matters whether dimensionally stable, one-piece products with a solid surface finish, such as B. a piece of cheese, or products with unstable, in particular applied surface properties, z. B. breaded meat, are fumigated.
  • Packagings with a high recorded degree of filling, in which breaded meat is inserted, could be fumigated at a reduced gas velocity in order to avoid damage to the breading layer.
  • gassing with a higher gas velocity in the case of one-part pack contents formed with a stable surface could in principle be set for an increased production rate, in particular when a low degree of filling is detected.
  • the process parameter is a valve setting value, in particular a throttle valve position, which influences an evacuation and / or gassing process.
  • a valve setting value in particular a throttle valve position, which influences an evacuation and / or gassing process.
  • the valve setting value is preferably continuously adapted automatically during the manufacturing process, so that optimal process settings can always be used. This particularly favors precise gassing and offers excellent control for the manufacture of optically equivalent products.
  • One embodiment variant provides that the process parameter triggers a malfunction display on the packaging machine.
  • leaks can be detected during the manufacturing process, in particular during the gassing and / or evacuation process within the sealing station, and can be displayed immediately to the operating personnel so that production can be interrupted if necessary, for example to adjust process parameters on the packaging machine.
  • the (free) packing volume is preferably connected to a collecting volume of known size and the (free) packing volume is calculated based on a recorded pressure equalization.
  • a collecting volume of known size For example, an external storage device, an external gas tank or a volume created by the upper tool part of the sealing station can be used as the collecting volume of known size. This procedure can be used in particular for the precise calculation of a reference package volume of empty packages of a fume cupboard, which can then be used in the calculation of the reference pressure curve.
  • a separately provided gas tank could be designed to be lockable by means of an additional valve, so that the pressure equalization between it and the free packing volume can be precisely regulated.
  • a change in pressure in the gas tank can then be recorded, which is used to calculate the volume transition it is based on what the remaining volume, i.e. the (free) packing volume, can be calculated from.
  • the Boyle-Mariotte law could again be used as the basis for calculation.
  • An improved variant provides that the process parameter is set continuously in view of averaged values of the degree of filling and / or the volume flow. This allows the control effort on the packaging machine to be reduced. This can be of particular advantage in an operating situation in which there is a high probability that slight changes in the degree of filling will occur, for example when packing sliced sausage.
  • the pack volume filled with gas is formed in such a way that during the gassing process, in particular during the sealing stroke, a pressure equalization takes place between several packs positioned within the sealing station.
  • the respective packagings enclosed within a sealing chamber can be connected via a gap formed between the upper and lower packaging material.
  • the process parameter can be an adjustable speed of a stroke movement of the sealing tool, which is adjustably mounted within the sealing station, so that it moves in such a way that the pressure equalization can take place reliably between the several packagings provided.
  • a supply line volume connected to the packing volume which results for example from a gassing line, an evacuation line and / or a tool volume, is preferably deducted when calculating the degree of filling.
  • the sealing plate stroke i. H. the partial volume of the pack displaced as a result, in view of the known geometries of the upper part of the sealing tool, can be deducted when calculating the degree of filling. Assuming that these values, which may falsify the degree of filling calculation, remain constant, standard values, which are stored in the machine control, can be used.
  • the principle according to the invention could precede the gassing process and take place during an evacuation process. It would thus be possible to functionally transfer the embodiments described above in connection with the invention to the evacuation process, so that a process-controlled parameter setting based thereon can already take place during the evacuation process.
  • process parameters can also be set outside the sealing station, ie at other work stations of the packaging machine, in such a way that the respective workstations of the packaging machine can work together excellently in order to achieve an improved production result.
  • the invention thus contributes to an overall process-controlled packaging machine.
  • the invention also relates to a packaging machine, which is in particular in the form of a deep-drawing packaging machine, the sealing station of which is designed to produce packs with a pack optics that is at least substantially similar to one another with possibly varying degrees of filling.
  • the packaging machine according to the invention comprises a control unit which is functionally connected to at least one sensor system formed at the sealing station for detecting a pressure of a package volume provided within the sealing station.
  • control unit is configured to calculate a filling level based on a comparison of a time-dependent, at least temporarily, preferably during filling of the package volume enclosed within the sealing station between predetermined pressure levels, with a time-dependent reference pressure profile stored between the predetermined pressure levels in the control unit for filling a known reference volume, and / or to calculate a volume flow with respect to the pressure curve or the reference pressure curve, the control unit also being designed to set at least one process parameter on the packaging machine taking into account the calculated filling level and / or the volume flow.
  • control unit is designed as a process-controlled sequence control, so that operation of the packaging machine can be perfectly adapted to the respective actual measured variables.
  • control unit can determine the filling level and / or volume flow based on a comparison of the pressure profile with a reference pressure profile provided for the manufacturing situation. Based on this, the control unit sets at least one process parameter of at least one further actuator of the packaging machine.
  • process parameters are formed as output signals in accordance with a control algorithm for performing the aforementioned comparison, which via actuators to a control object (technological process, control path) provided on the packaging machine, for example to at least one work process on the Sealing station, act.
  • Fig. 1 shows a schematic representation of a sealing station S 'according to the prior art.
  • the sealing station S ' has an upper sealing tool part SO' and a lower sealing tool part SU 'which can be closed with the upper sealing tool part SO' and which is designed to receive preformed packaging trays VM '.
  • Packaging trays VM 'shown are packaging contents I', ie products, added whose degrees of filling FG 'are different.
  • the sealing station S ' forms a sealing chamber SK', in which the packaging trays VM ', together with an upper film O' positioned over them, 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 VM' and released by the products.
  • the partial volume V2 ' forms an imaginary partial volume which is enclosed between the upper film O' and an imaginary plane E 'shown in dashed lines.
  • a connecting gap SP' is formed above the packaging troughs VM ', which, in particular during the filling process, allows the gas G' to be distributed within the entire packaging volume P '.
  • a sealing tool SW ' for example a height-adjustable sealing frame, is positioned within the sealing tool upper part SO' for a sealing process, which is designed to move the upper film O 'for the sealing process in the direction of the packaging trays VM' provided below by means of a lifting movement H '.
  • the embodiment shown is initially the packing volume P ', consisting of the sum of the respective partial volumes V1', V2 ', filled to a preset gas pressure with a gas G' to create a desired atmosphere.
  • the gassing pressure is conventionally generated from a difference between a target gas pressure of finished packaging and a preset gas offset pressure.
  • the sealing tool SW' pushes the amount of gas contained in the sub-volume V2 'into the sub-volume V1' released by the product contents I 'within the packaging trays VM', so that, assuming a homogeneous level distribution, ie not within itself varying fill levels, in the finished packaging, the target gas pressure can be set.
  • the respective fill levels of the provided packaging can vary, so that the above offset approach, which, contrary to actual circumstances, is based on the assumption of a homogeneous fill level distribution, leads to the production of visually different packaging.
  • 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 drawn 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).
  • a deep-drawing process taking place there 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 by means of the cross-cutting device 4 and the longitudinal cutting device 5 individually and can be transported away by means of a discharge device 13. It may be that empty packaging LV is included in the conveyed goods, for example because of an interruption in the product preparation process.
  • the in Fig. 2 shown packaging machine 1 via a control terminal 9, on which process parameters can be set for the respective workstations provided on the packaging machine 1.
  • the operating terminal 9 comprises a control unit 11, which is only shown schematically.
  • the control unit 11 is configured to perform arithmetic operations, in particular in real time during the manufacturing process, in order to control the packaging machine based on this, i.e., if necessary, to initiate an adjustment of the respective process parameters of the packaging machine based on the process .
  • the control unit 11 is equipped with a sensor system 12 for detecting a pressure P IST (see FIG Fig. 3 ) one within the sealing station 3 according to Fig. 3 formed packing volume P connected.
  • a pressure P IST see FIG Fig. 3
  • the control unit 11 can continuously be transmitted current pressure values during the manufacturing process, that is to say the respective pressure curves, during the gassing and / or evacuation process.
  • control unit 11 is connected to a schematically illustrated memory 17 so that it can access reference values stored thereon to generate process parameters, in particular to adapt such. For example, it can compare the pressure profile recorded as an input variable at the sealing station 3 by means of the sensor system 12 with a corresponding reference pressure profile of the memory 17, determining a degree of filling and / or a volume flow in a first step using an algorithm and based on it in a further step generates at least one process parameter as an output variable, on the basis of which the manufacturing process can be adapted, so that the packaging machine 1 is able to optimally adapt the manufacturing process running on it to the respective filling states.
  • Fig. 3 shows the sealing station 3 of in Fig. 2 packaging machine 1 shown in an isolated illustration.
  • the sealing station 3 comprises an upper sealing tool part 20 and a lower sealing tool part 21, which enclose a sealing chamber 23.
  • Fig. 3 further shows that two packaging trays 14 with respective products 16 are received in the sealing tool lower part 21, their respective degrees of filling 22 differing.
  • the packing volume P 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.
  • the one viewed in the image plane on the right with A packaging tray 14 present with a lower degree of filling 22 forms a larger proportion of the packaging volume P than the other packaging tray 14, shown to the left of it with a higher degree of filling 22.
  • the partial volume V2 enclosed by the upper film O and the imaginary plane E as well as the partial volume V1 provided within the packaging trays 14 (free package volume P) can be filled with a gas G via a line 26 and gas pins 29 provided thereon.
  • a gas source Q is provided for the gas supply.
  • An evacuation process can be controlled by means of a (vacuum) pump VP.
  • valves 27a, 27b are formed in the line 26, which can be controlled in particular in a process-controlled manner, for example on the basis of recorded pressure values.
  • a pressure sensor 18 is connected to the line 26 as a sensor system 12 for detecting the pressure P IST prevailing within the package volume P.
  • the pressure sensor 18 is functionally connected to the control unit 11, which is configured to further calculate the pressure P IST transmitted to it as an input variable.
  • the control unit 11 is able to determine the pressure curve present on the basis of the detected pressure values P IST during the filling of the package volume P and to compare this, if necessary a section thereof, with a preset reference pressure curve in order to generate a reference pressure curve based thereon using an algorithm To calculate the degree of filling and / or a volume flow with respect to the packaging V positioned within the sealing station 3, based on which the control unit 11 generates at least one process parameter PP as an output variable.
  • FIG. 3 To the line 26 is according to Figure 3 connected to a collection volume that can be used to calculate the packing volume P. Also shows Figure 3 a feed line section 30, the volume of which can be deducted when calculating the degree of filling 22.
  • Fig. 4 shows a schematic representation of a method using the invention.
  • the free packing volume P is filled with a gas G via the line 26 to create a desired atmosphere.
  • step B pressure is detected by means of the sensor system 12 within the package volume P.
  • a time-dependent pressure profile 27 for the pressure P ACT that is present within the package volume P between an outlet pressure P1 up to a predetermined gassing pressure P2 can be achieved capture.
  • the control unit 11 can be configured to take into account only a section of the pressure curve 27 for the further method.
  • the pressure curve 27 recorded in method step B is a linear pressure curve K IST .
  • a comparison VG of the recorded pressure profile 27 with a reference pressure profile 28 takes place.
  • the control unit 11 retrieves the reference pressure curve 28 from the memory 17 for the comparison VG.
  • the control unit 11 can be designed to call up a suitable reference pressure curve 28 from a plurality of reference pressure curves 28 provided on the memory 17 with regard to at least one process parameter predetermined for the manufacturing process on the packaging machine 1, in particular at the sealing station 3.
  • a time-dependent reference pressure curve K REF is shown, which would arise in particular when gassing empty packaging LV used for the manufacturing process.
  • step C After performing method step C, i.e. after comparing the respective gradients of pressure curve 27 and reference pressure curve 28, according to subsequent method step D, degree of filling 22 and / or volume flow V. This is based in particular on the respective for pressure curve 27 and for the reference pressure curve 28 elapsed time segments t and t *, based on the packing volume P and the respective pressure levels P1, P2.
  • the calculated degree of filling 22 and / or volume flow V can be used in a further method step E by the control unit 11 to calculate at least one process parameter PP.
  • the control unit 11 calculates an offset pressure P OFF , a gas speed V GAS , a valve setting value x and / or triggers a malfunction display y based thereon.
  • the control unit 11 can calculate a pressure P RED , up to which the filling process A is controlled, in view of a desired gassing target pressure P SOLL of finished packaging V. This is shown schematically in Figure 4 shown by the dashed line EZ.
  • the principle according to the invention can be excellently applied in a process-controlled packaging machine in which the respective work processes run based on measurement signals, so that, considered in total, both optimal process times and higher quality products can be produced.

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

Claims (13)

  1. Procédé d'exploitation d'une station de scellage (3) d'une machine d'emballage (1) pour la production d'emballages (V) avec une présentation d'emballage au moins essentiellement similaire à des niveaux de remplissage au besoin variables (22), comprenant les étapes suivantes :
    • remplissage (A) d'un volume d'emballage libre (P) enfermé entre un matériau d'emballage inférieur et un matériau d'emballage supérieur (8, 10) d'au moins un emballage (V) positionné à l'intérieur de la station de scellage (3) avec un gaz (G) destiné à obtenir une atmosphère déterminée souhaitée d'une pression initiale (P1) à une pression de gazage déterminée (P2) d'un volume d'emballage (P),
    • enregistrement (B) d'une distribution de pression (27) au moins temporairement durant le remplissage (A) du volume d'emballage (P) au moyen d'au moins un système capteur de pression (12) qui y est connecté, dans lequel la distribution de pression (27) est préférablement enregistrée à l'aide d'une courbe de pression en fonction du temps (KIST) entre la pression initiale (P1) et la pression de gazage prédéterminée (P2),
    • comparaison (C) de la distribution de pression enregistrée (27) à une distribution de pression de référence (28), qui est préférablement enregistrée à l'aide d'une courbe de pression en fonction du temps (KREF) pour le remplissage d'un volume d'emballage de référence libre connu (PREF) d'au moins un emballage de référence vide (VREF) en particulier, positionné à l'intérieur de la station de scellage (3) avec le gaz (G) entre la pression initiale (P1) et la pression de gazage prédéterminée (P2),
    • calcul (D) d'un niveau de remplissage (22) de l'emballage (V) positionné à l'intérieur de la station de scellage (3) sur base de la comparaison de la distribution de pression enregistrée (27) à la distribution de pression de référence (28), et/ou d'un débit volumique (V̇) sur base de la comparaison de la distribution de pression enregistrée (27) à la distribution de pression de référence (28), et
    • régulation (E) d'au moins un paramètre de processus (PP) sur la machine d'emballage (1) en prenant en compte le niveau de remplissage calculé (22) et/ou le débit volumique (V) .
  2. Procédé selon la revendication 1, caractérisé en ce que le quotient du rapport entre le temps (t) mesuré pour la distribution de pression (27) et le temps (t*) mesuré pour la distribution de pression de référence (28) est soustrait d'un total pour calculer le niveau de remplissage (22) .
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le calcul du niveau de remplissage (22) et/ou du débit volumique (V̇) est effectué en temps réel à chaque cycle de la machine, sur base de quoi une régulation automatique du paramètre de processus (PP) est effectuée.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le paramètre de processus (PP) est une pression de compensation (POFF) qui est utilisée pour le processus de remplissage (A) et/ou pour au mois un processus de remplissage subséquent, pour remplir le volume d'emballage (P) uniquement avec du gaz (G) jusqu'à atteindre une pression (PRED), qui correspond à une pression de consigne de gazage (PSOLL) pour des emballages fabriqués terminés (V) de laquelle est soustraite la pression de compensation calculée (POFF).
  5. Procédé selon la revendication 4, caractérisé en ce que la loi de Boyle-Mariotte est utilisée pour le calcul de la pression de compensation (POFF) en tenant en compte un volume partiel (V2) du volume d'emballage (P) déplacé par un mouvement de scellage (H) et un volume d'emballage libre (V1) déterminable par rapport au niveau de remplissage calculé (22), comprenant la pression de consigne de gazage (PSOLL) qui doit y être produite d'emballages fabriqués terminés (V).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le paramètre de processus (PP) est une vitesse du gaz (VGAS) qui est atteinte à chaque tige de gaz respective (29) agencée pour remplir le volume d'emballage (P).
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le paramètre de processus (PP) est une valeur de régulation de vanne (x) qui agit sur une opération d'évacuation et/ou de gazage.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le paramètre de processus (PP) déclenche un affichage de dysfonctionnement (y) sur la machine d'emballage (1).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que le volume d'emballage libre (P) est connecté à un volume de rétention (AV) de grandeur connue et est calculé sur base d'une compensation de pression enregistrée du volume d'emballage libre (P).
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le paramètre de processus (PP) est régulé en continu en fonction de la valeur moyenne du niveau de remplissage (22) et/ou du débit volumique (V).
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que le volume d'emballage (P) rempli de gaz (G) est conformé de telle sorte que, durant le mouvement de scellage (H), une compensation de pression a lieu entre plusieurs emballages (V) positionnés à l'intérieur de la station de scellage (3).
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un volume d'alimentation (30) connecté au volume d'emballage (P) est soustrait lors du calcul du niveau de remplissage (22).
  13. Machine d'emballage (1) pour la production d'emballages (V) avec une présentation d'emballage au moins essentiellement similaire à des niveaux de remplissage au besoin variables (22), comprenant une station de scellage (3) et une unité de commande (11) connectée fonctionnellement à un système capteur (12) monté sur la station de scellage (3) pour enregistrer une pression (PIST) d'un volume d'emballage (P) agencé à l'intérieur de la station de scellage (3), caractérisée en ce que l'unité de commande (11) est configurée pour calculer un niveau de remplissage (22) sur base de la comparaison (C) d'une distribution de pression en fonction du temps (27) enregistrée entre des niveaux de pression prédéterminés (P1, P2) au moins temporairement durant un remplissage (A) du volume d'emballage (P) enfermé à l'intérieur de la station de scellage (3) avec une distribution de pression de référence (28) entre les niveaux de pression prédéterminés (P1, P1) consignée dans l'unité de commande (11) pour le remplissage (A) d'un volume de référence connu (VREF), et/ou un débit volumique (V̇) sur base de la comparaison (C) de la distribution de pression enregistrée (27) à la distribution de pression de référence (28), dans laquelle l'unité de commande (11) est en outre conçue pour réguler au moins un paramètre de processus (PP) sur la machine d'emballage (1) en fonction du niveau de remplissage calculé (22) et/ou du débit volumique (V̇).
EP19178020.4A 2018-06-14 2019-06-04 Procédé de détermination du débit volumétrique et du degré de remplissage sur une machine d'emballage Active EP3587285B1 (fr)

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EP3409600B1 (fr) * 2017-06-02 2019-12-11 MULTIVAC Sepp Haggenmüller SE & Co. KG Scelleuse de barquettes
DE102018114263A1 (de) * 2018-06-14 2019-12-19 Multivac Sepp Haggenmüller Se & Co. Kg Füllstandsunabhängiges begasen
KR20240052802A (ko) * 2021-09-07 2024-04-23 비디 키에스트라 비.브이. 채혈 시스템

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US3509686A (en) * 1968-06-27 1970-05-05 Anderson Bros Mfg Co Apparatus for packaging in protective atmosphere
DE1939216C3 (de) * 1969-08-01 1975-06-12 Kraemer & Grebe Kg, Maschinenund Modellfabrik, 3562 Wallau Einrichtung zum Entlüften und Begasen von Packungen
DE3318993A1 (de) * 1983-05-25 1984-11-29 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Verfahren und vorrichtung zum herstellen einer packung
DE102004044077A1 (de) * 2004-05-06 2005-11-24 Andreas Oesterlein Verfahren zum Steuern einer Vakuumverpackungsmaschine sowie Vakuumverpackungsmaschine
DE102007013698A1 (de) * 2006-12-22 2008-06-26 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine
DE102007031527B3 (de) * 2007-07-06 2008-06-19 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine und Verfahren zum Herstellen von Packungen aus einer Folie
WO2012100955A1 (fr) 2011-01-27 2012-08-02 Cfs Germany Gmbh Machine d'emballage et procédé de production d'emballages dans lesquels le vide est effectué et/ou du gaz est injecté individuellement
WO2017021556A1 (fr) * 2015-08-06 2017-02-09 Multivac Sepp Haggenmüller Se & Co. Kg Machine d'emballage à fonction de réglage amélioré
WO2017125386A2 (fr) 2016-01-20 2017-07-27 Gea Food Solutions Weert B.V. Enveloppeuse en continu avec contrôle des emballages obtenus en vue de la détection de fuites

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ES2904374T3 (es) 2022-04-04
EP3587285A1 (fr) 2020-01-01
DE102018114259A1 (de) 2019-12-19
EP3587286B1 (fr) 2021-02-24
ES2867229T3 (es) 2021-10-20
US20190382142A1 (en) 2019-12-19
US11111044B2 (en) 2021-09-07

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