EP3476753B1 - Tiefziehverpackungsmaschine und verfahren zum betreiben einer tiefziehverpackungsmaschine - Google Patents

Tiefziehverpackungsmaschine und verfahren zum betreiben einer tiefziehverpackungsmaschine Download PDF

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Publication number
EP3476753B1
EP3476753B1 EP18202185.7A EP18202185A EP3476753B1 EP 3476753 B1 EP3476753 B1 EP 3476753B1 EP 18202185 A EP18202185 A EP 18202185A EP 3476753 B1 EP3476753 B1 EP 3476753B1
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EP
European Patent Office
Prior art keywords
feed length
feed
packaging machine
work stations
station
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
EP18202185.7A
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German (de)
English (en)
French (fr)
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EP3476753A1 (de
Inventor
Stefan MERK
Martin Jochem
Verena SCHÜLLER
Daniel Mair
Thomas Simon
Norbert Wörz
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
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Publication of EP3476753A1 publication Critical patent/EP3476753A1/de
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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
    • B65B31/02—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
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/14—Punching tools; Punching dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or 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
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/04—Automatic 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 control, or to stop, the feed of such material, containers, or packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • 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
    • B65B59/003—Arrangements to enable adjustments related to the packaging 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
    • 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
    • B65B59/005—Adjustable conveying means
    • 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
    • B65B59/02—Arrangements to enable adjustments to be made while the machine is running
    • 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
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/005—Computer numerical control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4427—Cutters therefor; Dies therefor combining cutting and forming operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4463—Methods and devices for rule setting, fixation, preparing cutting dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4472—Cutting edge section features
    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/162—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by feeding web material to securing means
    • B65B7/164—Securing by heat-sealing

Definitions

  • the invention relates to a method for operating a thermoforming packaging machine and to such a thermoforming packaging machine itself.
  • thermoforming packaging machine is, for example, from DE 10 2015 211 622 A1 out.
  • Such packaging machines are characterized by a forming station for deep-drawing troughs in a packaging film and usually include a sealing station for sealing the deep-drawn troughs with a lid film and a cutting station for separating the packages produced. Furthermore, these machines comprise a feed device for effecting a feed of the packaging film.
  • thermoforming packaging machine In most cases, such a thermoforming packaging machine is operated intermittently or in cycles. In each work cycle, the packaging film is transported forward by a constant, fixed, predefined feed length by means of the feed device. In this case, the feed length is also referred to as the "pull-off length". It indicates the length of each packaging format produced in a single work cycle in the production direction of the thermoforming packaging machine.
  • thermoforming packaging machine in which the packaging film is provided with so-called print marks at regular intervals. After these pressure marks have been detected by means of a corresponding pressure mark sensor, the packaging machine can DE 42 16 209 C2 different work stations can be changed in their position in the longitudinal direction of the packaging machine, so that they are placed in the ideal position relative to the print marks. This allows the feed length of the packaging film to remain constant in each work cycle.
  • the length of a film feed is controlled solely in the sealing station with regard to an exact target position.
  • the object of the present invention is to improve a thermoforming packaging machine and a method for operating such a thermoforming packaging machine with regard to their flexibility of use or versatility and efficiency.
  • a work step means the performance of a primary function of the respective work station, i.e. deep-drawing depressions in the packaging film in the case of a forming station, sealing the depressions with a lid film in the case of a sealing station, or making an incision in the packaging film in the case of a cutting station.
  • the invention now takes into account that the feed length requirement for different work stations can be different. Therefore, the feed length requirements of two or more work stations, possibly even of all work stations, are first collated before a single feed length specification is obtained from the several, possibly different, feed length requirements. The feed device is then controlled, preferably by means of the controller of the thermoforming packaging machine, to transport the packaging film by a feed length corresponding to the feed length specification.
  • the great advantage of the invention is that not only can the respective work stations act on the packaging film at the optimum points, but that the thermoforming packaging machine can even be able to do this without changing the packaging material and even at irregular intervals follow to produce and process different packaging formats.
  • the feed length requirement of the two or more work stations is preferably determined before each individual feed of the packaging film and a feed length specification is obtained from this.
  • the thermoforming packaging machine is operated intermittently, in particular in regular work cycles, and the feed length requirements of the two or more work stations are determined in each individual work cycle and a feed length specification is obtained from this. In this way, the invention unfolds its advantages over the entire operation of the thermoforming packaging machine.
  • the feed device is controlled to transport the packaging film by a feed length that corresponds to the smallest determined feed length requirement.
  • this measure also keeps the time required for the next feed particularly short and thus the work output of the thermoforming packaging machine is increased overall.
  • this measure allows that after the work step has been carried out by the workstation that has the smallest feed length requirement, the feed of the packaging film is matched to the feed length requirement of those work stations that have a greater feed length requirement. In this way, each of the workstations involved can finally carry out its work step.
  • This variant of the invention is particularly useful when the positions of the individual work stations along the thermoforming packaging machine cannot be changed.
  • thermoforming packaging machine a variant of the method is also conceivable in which the position of at least one of the work stations can be adjusted in a production direction of the thermoforming packaging machine and is adjusted when the method is carried out.
  • Changing the position of the at least one work station in the direction of production of the thermoforming packaging machine is added as a second degree of freedom to the degree of freedom in the selection of the feed length specification.
  • the position of several or even all of the work stations in the direction of production could also be changed. With this second degree of freedom, the flexibility of using the thermoforming packaging machine is further increased.
  • this variant of the method opens up the possibility of increasing the work output of the thermoforming packaging machine even further by specifying the feed length and positioning the work stations with the aim of as far as possible high cycle performance of the packaging machine can be coordinated and optimized by allowing as many of the work stations as possible to carry out their work step in each cycle.
  • the positions of not only one, but several of the work stations of the thermoforming packaging machine can be adjusted in the production direction over a specified travel range, it can be particularly advantageous to determine a feed length default range for each of these work stations, taking into account the respective travel range.
  • the minimum of this feed length specification range is the feed length that would be required for the particular work station if the work station moved to its most upstream position prior to the next operation.
  • the maximum of the feed length specification range is the feed length that would be required if the respective work station were moved to its most downstream position before its next operation. The difference between the maximum and the minimum of the feed length specification range thus corresponds to the length of the traversing range of the respective work station.
  • the feed length specification is selected from an overlapping area in which the feed length specification areas of the work stations whose position can be adjusted in the direction of production overlap.
  • the feed length specification could be chosen from the middle third of the overlapping area or even exactly at the center point of the overlapping area.
  • thermoforming packaging machine which, as work stations, has at least one forming station for thermoforming troughs in a packaging film, at least one sealing station for sealing these troughs with a lid film and at least one cutting station, the thermoforming packaging machine also having a feed device for effecting a feed of the Packaging film and a controller (e.g. a programmable logic controller [PLC] computer or a microprocessor) includes.
  • a controller e.g. a programmable logic controller [PLC] computer or a microprocessor
  • the invention is characterized in that the feed device is configured to generate a feed length that is variable per work step of the thermoforming packaging machine, that the control has a determination section that is set up to determine a feed length requirement of the respective work station for two or more work stations, that the control has an evaluation section that is configured to determine a feed length specification from the feed length requirements of the two or more work stations, and that the controller is set up to control the feed device to move the packaging film by a feed length corresponding to the feed length specification.
  • the determination section of the control can either calculate itself what feed length requirements the two or more work stations have, or it can receive the respective feed length requirements from the work stations.
  • the invention deviates from the concept of a fixed feed length.
  • the variable feed length enables optimized operation of the thermoforming packaging machine and, in particular, alternating or even irregular processing of formats of different sizes.
  • the feed device can be configured to generate a stepwise or even continuously variable feed length. While a feed length that can be changed in steps minimizes the computing effort required for the controller, a steplessly variable feed length enables even more versatile operation of the thermoforming packaging machine. It is expedient if the feed device comprises a clamp chain with a controllable servomotor. While the chain of clamps grips the packaging film securely, the servo motor can be controlled with different feed length specifications.
  • the evaluation section of the controller is configured to determine the lowest feed length requirement.
  • the controller is set up to control the feed device to move the packaging film by a feed length that corresponds to the smallest required feed length.
  • this variant is particularly advantageous if the positions of the individual work stations along the thermoforming packaging machine are fixed.
  • the position of at least one of the work stations can be adjusted in the direction of production. This allows the position of the workstations to be changed in such a way that, in conjunction with the variable feed length specification, the performance of the thermoforming packaging machine is maximized.
  • a feed length preset range can be determined for each of these work stations, taking into account their travel range.
  • the evaluation section is configured to determine an overlapping area in which the feed length default areas of the position in Work stations that can be adjusted in the production direction overlap and for selecting the feed length specification from the overlapping area.
  • FIG. 1 shows a schematic side view of a thermoforming packaging machine 1.
  • This thermoforming packaging machine 1 has a forming station 2, a first sealing station 3a, a second sealing station 3b, a cross cutting device 4 and a longitudinal cutting device 5, which are arranged in this order in a production direction P on a machine frame 6 .
  • On the input side there is a feed roll 7 on the machine frame 6, from which a packaging film 8 is pulled off.
  • a material store 9 is provided in the area of the sealing stations 3a, 3b, from which a cover film 10 is pulled off.
  • a discharge device 13 in the form of a conveyor belt is provided on the packaging machine finished, individual packages are transported away.
  • the packaging machine 1 has a feed device 11 which grips the film 8 and transports it further intermittently in the production direction P per main work cycle.
  • the feed device 11 can, for example, have clamp chains 12 that engage the packaging film 8 on both sides.
  • the forming station 2 is designed as a deep-drawing station, in which depressions 14 are formed in the packaging film 8, usually a plastic film, by deep-drawing.
  • the forming station 2 can be designed in such a way that in the production direction P and/or in the direction perpendicular to the production direction P, a plurality of troughs are formed next to one another.
  • An insertion line 15 is provided downstream of the forming station 2 in the production direction P, in which the depressions 14 formed in the packaging film 8 are filled with a product 16 .
  • Each sealing station 3a, 3b has a closable chamber 17 in which the atmosphere in the troughs 14 can be replaced before sealing, for example by flushing with a replacement gas or with a gas mixture.
  • the cross-cutting device or cutting station 4 is designed as a punch, which cuts through the packaging film 8 and the lid film 10 in a direction transverse to the production direction P between adjacent troughs 14 .
  • the cross-cutting device 4 works in such a way that the packaging film 8 is not severed over the entire width, but rather is not severed at least in an edge region. This enables controlled further transport by the feed device 11.
  • the longitudinal cutting device or second cutting station 5 is designed as a knife arrangement, with which the packaging film 8 and the lidding film 10 are severed between adjacent troughs 14 and at the lateral edge of the packaging film 8, so that individual packages are present behind the longitudinal cutting device 5.
  • the packaging machine 1 also has a controller 18. It has the task of controlling and monitoring the processes taking place in the packaging machine 1.
  • a display device 19 with operating elements 20 serves to visualize or to influence the process sequences in the packaging machine 1 for or by an operator.
  • thermoforming packaging machine 1 The general mode of operation of the thermoforming packaging machine 1 is briefly described below.
  • the packaging film 8 is pulled off the supply roll 7 and transported into the forming station 2 by the feed device 11 .
  • depressions 14 in the packaging film 8 formed.
  • the troughs 14 are transported on to the insertion line 15 together with the surrounding area of the packaging film 8 .
  • a product 16 is placed in the troughs 14 during the feed movement or when the feed is at a standstill.
  • the filled troughs 14 are then transported further by the feed device 11 to the sealing station 3a, 3b.
  • the troughs 14 can optionally be evacuated and/or gassed with an inert gas before the cover film 10 is sealed onto the troughs 14 in order to hermetically close the troughs 14.
  • the transverse and longitudinal cutting devices 4, 5 ensure that the troughs 14 are separated, which are finally transported away on the discharge device 13.
  • a servomotor 12a that can be controlled by the controller 18 is provided as a drive for the chain of clamps 12 .
  • FIG 1 already indicates two different embodiments of the thermoforming packaging machine 1.
  • the position of the work stations 2, 3a, 3b, 4, 5 in the production direction P of the thermoforming packaging machine 1 cannot be changed.
  • the position of certain work stations, here specifically the two sealing stations 3a, 3b can be changed in the production direction P independently of one another. This means that the respective work stations 3a, 3b can be moved in or against the production direction P.
  • each of the two sealing stations 3a, 3b is assigned a linear drive 21, which can be controlled by the controller 18 and is configured to change the position of the respective sealing station 3a, 3b over a respective traversing range 22a, 22b.
  • Figure 2A shows a schematic plan view of a first format F1 and a second format F2, which can be produced with the thermoforming packaging machine 1. It would be conceivable, for example, for the thermoforming packaging machine to have two forming stations 2 one behind the other in the production direction P, one of which produces an arrangement of packaging trays 14 in format F1, while the other is able to produce an arrangement of trays 14 in format F2.
  • a format is in each case a group of troughs 14 which are produced together in the packaging film 8 in one work step.
  • a single forming station 2 can also produce the two different formats.
  • the two in Figure 2A Formats F1, F2 shown as examples are each multi-row and multi-lane, ie they each include both parallel to the production direction P several lanes S of troughs 14 next to each other, ie also transverse to the production direction P several rows R of troughs 14 one behind the other.
  • the first format F1 comprises three tracks S and three rows R, of which each individual row R in the production direction P has a so-called "row length" RL of 100 mm. Overall, this results in a total length (so-called "draft length", AZL) of the format F1 of 300 mm in the production direction P.
  • the second format F2 also includes three tracks S, but with only two rows R. Each row R here has a “row length” RL in the production direction P of 150 mm.
  • the second format F2 in the production direction P thus has the same print length AZL of 300 mm as the first format F1.
  • FIG. 2B shows a schematic plan view of the thermoforming packaging machine 1 at a specific point in time in the operating sequence. It can be seen that in the production direction P there is always a first format F1 and a second format F2 in alternation.
  • the first sealing station 3a is configured to seal the troughs 14 of a first format F1 with the cover film 10.
  • a sealing tool of the first sealing station 3a for example a so-called sealing frame, has a contour corresponding to the division of the troughs 14 in the first format F1 and is thus able to provide each trough 14 of the first format F1 with a circumferential sealing seam.
  • the second sealing station 3b is set up to seal the troughs of the second format F2.
  • a sealing tool of the second sealing station 3b for example a sealing frame of the second sealing station 3b, has a contour corresponding to the division of the troughs in the second format F2.
  • the second sealing station 3b is able to provide each trough 14 in the second format F2 with a circumferential sealing seam.
  • the cross-cutting device 14 creates a cut transversely to the production direction P through the packaging film 8 at the in Figure 2B shown position. In this exemplary embodiment, the positions of the work stations 3a, 3b, 4 in the production direction P cannot be changed.
  • a working step of the first sealing station 3a consists in sealing the troughs 14 of a format F1, which takes place by exerting suitable pressure and suitable heat on the packaging film 8 and the lid film 10.
  • a work step of the second sealing station 3b consists analogously in creating a seal of the troughs 14 of the second format F2, while a work step of the cutting station or cross-cutting device 4 consists in severing the packaging film 8 using a suitable severing tool, for example a knife.
  • feed length requirement means the distance the packaging film 8 must be transported so that the respective work station 3a, 3b, 4 can carry out its next work step.
  • Figure 2C X1 designates that first format F1 which is located closest upstream of the first sealing station 3a and is therefore to be sealed as the next, first format F1 in the sealing station 3a. So that the sealing can take place, the X1 format must be transported completely into the first sealing station 3a.
  • the feed length requirement V3a, by which the format X1 has to be transported for this purpose, is 300 mm here, so it corresponds exactly to a withdrawal length AZL of the first format F1.
  • Figure 2D shows that at this point in time, immediately upstream of the second sealing station 3b, there is a first format F1 that cannot be sealed in the second sealing station 3b (and in any case must already have been sealed by the first sealing station 3a).
  • X2 designates that second format F2 which is upstream closest to the second sealing station 3b. So that this format X2 can be sealed in the second sealing station 3b, the packaging film 8 has to be advanced by a distance of 600 mm. This means that the feed length requirement V3b of the second sealing station 3b in this situation corresponds to 600 mm and thus double the pull-off length.
  • the controller 18 of the thermoforming packaging machine 1 includes, as in figure 1 shown, a determination section 18a which is set up to determine a feed length requirement V3a, V3b, V4 of the respective work stations 3a, 3b, 4 for two or more work stations 3a, 3b, 4.
  • the determination section 18a can be set up, for example, to receive and store the feed length requirement V3a, V3b, V4 of the respective workstations 3a, 3b, 4.
  • the determination section 18a can be configured, for example, in the form of a route control and set up to have knowledge of the positions of the respective formats F1, F2 and the dividing lines between two adjacent rows R in the production direction P of the thermoforming packaging machine at all times.
  • the determination section 18a can also be set up to recognize whether it already has knowledge of the current feed length requirement of each of the work stations 3a, 3b, 4 to be taken into account.
  • the controller 18 also includes an evaluation section 18b, which is configured to determine a feed length specification VV from the determined feed length requirements V3a, V3b, V4. The controller 18 finally transmits this preset feed length VV as a control command the feed device 11, in the exemplary embodiment shown specifically to the servo motor 12a, so that it transports the clamp chain 12 and thus the packaging film 8 gripped by it by a feed length V in the production direction P that corresponds to the feed length specification VV.
  • an evaluation section 18b which is configured to determine a feed length specification VV from the determined feed length requirements V3a, V3b, V4.
  • the controller 18 finally transmits this preset feed length VV as a control command the feed device 11, in the exemplary embodiment shown specifically to the servo motor 12a, so that it transports the clamp chain 12 and thus the packaging film 8 gripped by it by a feed length V in the production direction P that corresponds to the feed length specification VV.
  • the determination section 18a determines the respective feed length requirements V3a, V3b, V4 of the workstations 3a, 3b, 4.
  • the evaluation section 18b is configured to determine the smallest of the determined feed length requirements V3a, V3b, V4 as the feed length specification VV.
  • V3a 300 mm
  • V3b 600 mm
  • V4 150 mm
  • the situation shown can now carry out the cutting station 4 its next step, ie cut the packaging film 8 at the point X3.
  • the two sealing stations 3a, 3b remain inactive, ie they cannot yet carry out their respective work step.
  • FIG 3A shows starting from the in Figure 2F situation reached the feed length requirement V3a of the first sealing station 3a.
  • This remaining feed length requirement V3a results from the difference between the feed length requirement V3a according to FIG Figure 2C and the feed V of the packaging film 8 that has taken place in the meantime Figure 2F .
  • Figure 3B analogously shows the current feed length requirement V3b of the second sealing station 3b.
  • both the next work step of the first sealing station 3a can now take place, ie the sealing of the format X1, and the next work step of the cutting station 4, ie the severing of the packaging film 8 at the point X4.
  • Figure 4A shows starting from Figure 3D the feed length requirement V3a of the first sealing station 3a.
  • FIG 4B shows the feed length requirement V4 of the cross-cutting station 4 in this situation.
  • the evaluation section 18b determines this smallest feed length requirement V4 and transmits it as the feed length specification VV to the feed device 11 .
  • the cutting station 4 can now make the cut at the point X5.
  • Figure 5A shows a second embodiment of two formats F1, F2.
  • Figure 5B shows a specific operating state of the thermoforming packaging machine 1.
  • First and second formats F1, F2 of troughs 14 have been produced alternately one after the other on the packaging film 8.
  • the first sealing station 3a is configured to seal the first format F1
  • the second sealing station 3b is configured to seal the troughs 14 of a second format F2.
  • Figure 5C shows the feed length requirement V3a of the first sealing station 3a.
  • the next first format F1 upstream of the first sealing station 3a is at point X1.
  • the feed length requirement V3a of the first sealing station 3a is therefore 195 mm.
  • FIG. 5D shows the feed length requirement V3b of the second sealing station 3b at the same time.
  • Upstream of the second sealing station 3b is the closest second format F2 at point X2.
  • the first sealing station 3a can now carry out its next work step and seal the format X1 with the cover film 10.
  • Figure 6A shows a third exemplary embodiment of two different formats F1, F2, which can be produced in the packaging film 8 with one forming station 2 or two forming stations 2 arranged one behind the other.
  • Figure 6B shows a certain operating state of the thermoforming packaging machine 1 in a plan view, which comprises a first sealing station 3a for sealing first formats F1 and, downstream thereof, a second sealing station 3b for sealing second formats F2 of troughs 14.
  • the positions of each of the two sealing stations 3a, 3b in the production direction P can be changed.
  • the position of the first sealing station 3a can be moved by means of an associated linear drive 21 over a travel range 22a, which in Figure 6B is shown and has a total length of, for example, 675 mm.
  • the position of the second sealing station 3b can be adjusted analogously by means of an associated linear drive 21 via a traversing range 22b a total length of eg 585 mm in the production direction (ie parallel to the production direction P) can be adjusted.
  • FIG. 6C visualizes the feed length requirement V3a of the first sealing station 3a.
  • the first sealing station 3a can also be brought to the most downstream end of its travel range 22a, as denoted by the reference numeral 3a'.
  • the feed length requirement V3a of the first sealing station 3a is therefore not a singular value here, but a feed length specification range VBa (see Figure 6E ), which ranges from the minimum value V3a min to the maximum feed length requirement V3amax.
  • the evaluation section 18b uses this to determine an overlapping area UB in which the feed length specification ranges VBa, VBb of the workstations 3a, 3b involved overlap. From this overlapping area UB, the evaluation section 18b selects a specific value as feed length specification VV. For example, this can be a value in the middle third of the overlapping area UB, preferably even the mean value of the overlapping area UB. Alternatively, it would be conceivable for the evaluation section 18b to select the lowest value of the overlapping area UB in order to keep the feed length V as small as possible.
  • the selected feed length specification VV is given as a control command to the feed device 11 so that it transports the packaging film 8 forward by a corresponding feed length V.
  • a further variant of the control method could be optimized to the effect that the feed length specification VV is selected from the overlapping area UB in such a way that the workstations involved remain as far as possible in a middle area of their respective travel areas 22a, 22b.
  • the evaluation section 18b can be set up to select the feed length specification VV from the overlapping area UB with a view to minimizing the total time until the next work step at any workstation, since this increases the work output of the thermoforming packaging machine 1 overall.
  • the workstations involved it would be possible for one or more of the workstations involved to be moved upstream, i.e. in the opposite direction to the film feed, in order to obtain a new situation as quickly as possible, which enables a work step at any workstation.
  • figure 7 shows in a flowchart some steps from the method according to the invention or from the operating sequence of the thermoforming packaging machine 1.
  • the determination section 18a of the controller 18 determines in step S4 the feed length requirements V3a, V3b, V4... of all workstations 3a, 3b, 4 to be taken into account a feed length specification VV is generated.
  • step S3 a control command correlating with the feed length specification VV is sent to the drive 12a of the feed device 11 in step S6.
  • step S7 the servo motor 12a starts the feed of the feed device 11 and maintains this in step S8 until a query in step S9 shows that the positioning target has been reached, ie the feed by the desired feed length V has taken place.
  • the method then goes back to step S3, in which, after the work stations 3a, 3b or 4 have carried out the respective work steps, the release for the next feed takes place.
  • the essence of the invention is that the feed length is no longer kept constant from work cycle to work cycle, but on the contrary can vary from each work step to the next work step, especially taking into account the individual feed length requirements of several work stations.
  • thermoforming packaging machine 1 can be modified in many ways. It goes without saying that the values given are only examples, which were only used for the sake of illustration. It is entirely conceivable to also process more than two different formats F1, F2 on a thermoforming packaging machine 1 according to the invention, for which purpose a corresponding number of sealing stations 3a, 3b are preferably provided. The configuration of the formats F1, F2 can of course also differ significantly from the examples shown. It would also be conceivable to consider an upper web printing station for printing the upper web with its feed length requirement as a work station in the method according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP18202185.7A 2017-10-26 2018-10-24 Tiefziehverpackungsmaschine und verfahren zum betreiben einer tiefziehverpackungsmaschine Active EP3476753B1 (de)

Applications Claiming Priority (1)

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DE102017125077.8A DE102017125077A1 (de) 2017-10-26 2017-10-26 Tiefziehverpackungsmaschine und Verfahren zum Betreiben einer Tiefziehverpackungsmaschine

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EP3476753B1 true EP3476753B1 (de) 2022-06-29

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EP (1) EP3476753B1 (zh)
CN (1) CN109703828B (zh)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017131417A1 (de) * 2017-12-29 2019-07-04 Weber Maschinenbau Gmbh Breidenbach Vorrichtung zum Verpacken von Objekten
JP6766216B1 (ja) * 2019-04-24 2020-10-07 Ckd株式会社 検査装置、包装シート製造装置及び包装シート製造方法
DE102022102342A1 (de) * 2022-02-01 2023-08-03 Multivac Sepp Haggenmüller Se & Co. Kg Verpackungsmaschine oder verpackungslinie mit dynamischem rezeptwechsel

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Publication number Priority date Publication date Assignee Title
US4018028A (en) * 1971-07-23 1977-04-19 Societe D'application Plastique Mecanique Et Electronique, Plastimecanique S.A. Arrangement for aligning heat-sealable lids on mating product-filled containers
US4349997A (en) 1980-04-21 1982-09-21 Mitsubishi Jukogyo Kabushiki Kaisha Device for enabling registry of operations in an apparatus for continuously forming containers filled with material
US4549386A (en) * 1983-04-18 1985-10-29 Baker Perkins Holdings Plc Form-fill-seal wrapping apparatus
US4909018A (en) * 1987-05-13 1990-03-20 Omori Machinery Co., Ltd. Control device and method for controlling the driving system of a packaging machine
US4951444A (en) * 1989-02-06 1990-08-28 Durden To A.M.E. Engineering, Inc. Multi-station die-less packaging machine
US5138815A (en) * 1991-11-12 1992-08-18 Doboy Packaging Machinery, Inc. Microprocessor controlled SCR motor drives for wrapping machine
DE4216209C2 (de) 1992-05-15 1996-10-31 Multivac Haggenmueller Kg Verpackungsmaschine mit einem Druckmarkensensor und drei Arbeitsstationen mit eigenem Antrieb
NL9301496A (nl) * 1993-08-31 1995-03-16 Kloeckner Haensel Tevopharm Werkwijze en inrichting voor het manipuleren van een produktstroom.
SE521876C2 (sv) * 1999-12-22 2003-12-16 Tetra Laval Holdings & Finance Flerstegsenhet för bearbetning av ett banformat förpackningsmaterial i en maskin för förpackning av livsmedel
DE10152891B4 (de) * 2001-10-26 2005-01-05 Adolf Illig Maschinenbau Gmbh & Co.Kg Verfahren zum lagegenauen Ausstanzen von Behältern aus einer thermoplastischen Kunststofffolie und Thermoformmaschine zur Durchführung des Verfahrens
DE10243084B3 (de) * 2002-09-16 2004-01-29 CSAT Gesellschaft für Computer-Systeme und Automations-Technik mbH Vorrichtung zum positionsgenauen Zusammenfügen von zwei Materialsträngen
DE102008024461A1 (de) * 2008-05-21 2009-12-10 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine mit einer Bearbeitungsstationssteuereinheit
EP2740679B2 (de) * 2012-12-04 2019-12-04 MULTIVAC Sepp Haggenmüller SE & Co. KG Tiefziehverpackungsmaschine mit taktgenauer Positionierung einer Siegelstation und entsprechendes Verfahren
ITBO20130162A1 (it) * 2013-04-12 2014-10-13 Marchesini Group Spa Metodo e sistema per sincronizzare una stazione di lavorazione di una macchina blisteratrice con l'avanzamento di un nastro blister
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ES2924651T3 (es) 2022-10-10
US11008122B2 (en) 2021-05-18
CN109703828A (zh) 2019-05-03
US20190127101A1 (en) 2019-05-02
CN109703828B (zh) 2021-09-03
EP3476753A1 (de) 2019-05-01
DE102017125077A1 (de) 2019-05-02

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