EP0234307B1 - Procédé et dispositif de compensation de la longueur d'une bande d'un matériau qui se rétracte par refroidissement dans des machines pour fabriquer et pour détailler des emballages - Google Patents

Procédé et dispositif de compensation de la longueur d'une bande d'un matériau qui se rétracte par refroidissement dans des machines pour fabriquer et pour détailler des emballages Download PDF

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Publication number
EP0234307B1
EP0234307B1 EP87101084A EP87101084A EP0234307B1 EP 0234307 B1 EP0234307 B1 EP 0234307B1 EP 87101084 A EP87101084 A EP 87101084A EP 87101084 A EP87101084 A EP 87101084A EP 0234307 B1 EP0234307 B1 EP 0234307B1
Authority
EP
European Patent Office
Prior art keywords
station
length
strip
foil strip
cooling
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.)
Expired
Application number
EP87101084A
Other languages
German (de)
English (en)
Other versions
EP0234307A1 (fr
Inventor
Herbert Rittinger
Dieter Janek
Peter Auer
Rudolf Scheffold
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.)
CAMBIO RAGIONE SOCIALE;UHLMANN PAC - SYSTEME GMBH
Original Assignee
Uhlmann Pac Systeme 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
Family has litigation
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Application filed by Uhlmann Pac Systeme GmbH and Co KG filed Critical Uhlmann Pac Systeme GmbH and Co KG
Priority to AT87101084T priority Critical patent/ATE39452T1/de
Publication of EP0234307A1 publication Critical patent/EP0234307A1/fr
Application granted granted Critical
Publication of EP0234307B1 publication Critical patent/EP0234307B1/fr
Expired legal-status Critical Current

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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
    • 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
    • B65B47/02—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 with means for heating the material prior to forming
    • 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
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B65H20/18—Advancing webs by web-gripping means, e.g. grippers, clips to effect step-by-step advancement of web

Definitions

  • the invention relates to a method and a device for length compensation of a film strip made of a material that shrinks on cooling, in particular a thermoplastic, in machines for producing and separating packs, which in the longitudinal direction through a forming station, a further work station, in particular sealing station , and a separation station of the machine transported film strip by deep drawing and cut out, if necessary after filling and sealing, the film strip being heated before deep drawing and cooling and shrinking on its way between the forming station and the separation station, and whereby changes in the Pack dimensions and the pack spacing at the further work station are automatically recorded and / or compensated for up to a design-related maximum tolerance size without impairing the work process.
  • the film strip undergoes cooling on the way from the forming station to the separating station and thus shrinks in length, which at the further work station, in particular the sealing station, and subsequent stations, such as the separating station, in the transport direction lead to pack spacings and pack dimensions which are essentially constant in each case are large and determine the transport path by which the film strip is moved in cycles through the separation station.
  • This transport route is constant over the machine cycles.
  • the possibility of minor changes in package dimensions and package spacing as a result of the slightly changing shrinkage behavior of the film strip is taken into account by a free tolerance play between the package shape and the working tool, in particular the sealing tool, which is provided in the further work station.
  • Such changes in length can therefore be easily accommodated or compensated for in the work station and do not impair the work process when, for example, sealing the package, as long as they remain smaller than the maximum tolerance size predetermined by the free tolerance play in the work station.
  • the cooling of the film strip between the forming station and the separation station is less when the film strip is transported without interruption than in the case of a transport standstill, in which the piece of tape between the forming station and the separation station has the opportunity to cool down more or even completely to room temperature.
  • the greater cooling in any case during a transport standstill leads to a correspondingly greater shrinking of the length of the piece of tape, which is thus shortened more and thus the packs which follow one another in the transport direction can be brought closer together than in the case of uninterrupted machine operation.
  • the invention has for its object to provide a method and an apparatus of the type mentioned in such a way that the length compensation of the film strip can be set and carried out simply and precisely and the film strip need not be looped between the forming station and the separating station .
  • this object is achieved according to the invention in that with the start of the transport standstill, a length of the length L of strip of warm foil strip which is connected to the forming station in the transport direction and extends at least behind the further work station and at most as far as the separation station Position fixed against shifting and stretched to a greater length L 'at its other end and during the standstill time T or even until the band piece has completely cooled, this cooling time T' should be shorter than the standstill time T, kept in the stretched state , the elongation being dimensioned such that the length difference L'-L at the end of the standstill or cooling time T, T 'is essentially only based on purely elastic elongation of the piece of tape still having the original length L when released from the longitudinal tension-free state , and that the piece of tape so many along its length L out t ereinan-
  • the lying packs contain that the changes in the pack dimensions and, above all, the pack spacings caused by the temporary stretching process are each at most as large as the maximum permissible tolerance
  • the piece of tape between the forming station and the cutting station is subjected to a stretching process in the event of a transport standstill, during which it can cool to a lower temperature than during continuous transport, which counteracts the otherwise greater shrinkage of the piece of tape and at the end of the downtime there is a permanent stretching of the piece of tape which has the consequence that the cooler or even completely cooled piece of tape at the end of the downtime has essentially the same length as originally the still warm piece of tape at the beginning of the downtime.
  • the stretching process according to the invention preferably captures the strip areas closer to the forming station, and the stronger the warmer they are.
  • a particularly simple embodiment of the method according to the invention consists in that the length difference L'-L of the stretched band section is greater than that on the band section in the case of its longitudinal tension-free state during the standstill or cooling time T, T ', a shortening occurring due to shrinkage and during the standstill - or cooling time T, T 'is kept substantially constant.
  • This particularly simple embodiment is essentially made possible by the effect that the band piece has a greater specific elastic expansion behavior at a higher temperature level than at a lower temperature. This means that with a short downtime, the elastic stretch component is larger and the plastic stretch component is smaller than with a longer downtime, so that with increasing downtime the ratio between the elastic and the plastic stretch component shifts in favor of the latter.
  • a preferred embodiment of the invention in this case is that the length difference L'-L of the stretched piece of tape during the cooling process taking place in the downtime T in terms of its size over time in accordance with the temperature-dependent behavior of the properties of the elasticity, shrinking and stretching of the piece of tape Band material is controlled so that it is based at every moment of the cooling process essentially only on purely elastic expansion of the piece of tape that was thought to be released at that moment and still has the original length L in the state without longitudinal tension.
  • the piece of tape can then each can be released from the stretched state at any point in time, and it will always assume the original length L in the state without longitudinal tension.
  • the state of stretching need not be maintained longer than until the strip piece has completely cooled, that is to say no longer than at most the cooling time T ', because thereafter there is no further shrinkage to be counteracted.
  • the method will be expediently carried out in such a way that the piece of tape at its end lying between the further work station and the separating station experiences the positional fixation against displacement and at its end close to the forming station the tensile movement undergoes elongation. Since the piece of tape between this work station and the separating station experiences the smallest changes in shrinkage when the machine is at a standstill, this results in a particularly precise positional fixation of the film strip with respect to the work or sealing station.
  • the invention also relates to a device for carrying out the above-described method on a machine in which the film strip successively passes through a heating station, the forming station, the further work station, in particular the sealing station, which enables the tolerance size for its work process, a feed station transporting the film strip and the separation station, and in which the feed station is arranged in front of the latter in comparison to the path length between the forming station and the separating station.
  • the invention is that for the film strip, a collet arranged in its transport direction behind the heating station in front of, in or behind the forming station and controllable in its attack on the film strip is provided that the collet and the feed station do this when the transport is stopped Grip the film tape without slippage and that the collet or the feed station make the pulling movement to elongate the piece of tape.
  • a particularly preferred embodiment is characterized in that the collet is designed as a driver device which can be moved back and forth once during a machine standstill during a transport standstill by means of a lifting drive with a controllable path and / or force profile, the engagement of which on the film strip can be controlled in such a way that it does so
  • the film strip is only gripped and taken along without slippage during the idle period or until the strip piece has completely cooled down, and that the film strip is held in the feed station against longitudinal displacements when the transport is at a standstill.
  • the driver device effects the stretching process on the piece of tape held in the feed station, the feed station ensuring that the piece of tape cannot move in the separating station.
  • a particularly advantageous embodiment of the device is characterized in that the driver device has a counter plate supporting the foil strip and a frame which cross-engages the counter plate and which forms a passage gap for the foil strip with the counter plate, furthermore in the frame parallel to the counter plate and in A slide is slidably guided in the longitudinal direction of the film strip and can be moved back and forth in the guide direction, and that at least one tensioning shoe is provided on the slide, which participates in the slide adjustment and can be adjusted transversely through the passage gap against the counterplate by means of a tensioning drive and which faces one of the film strips Bears the friction lining and, when pressed against the film strip, takes it along in a slip-free frictional engagement in accordance with the slide movement.
  • the tension drive is expediently formed by power cylinders, the pistons of which can be actuated hydraulically or pneumatically against return springs.
  • the linear actuator there are various design options depending on the procedure. If, in particular, the piece of tape is to be jerkily stretched by a predetermined stroke size and then held in this stretched state without any further change, or if the piece of tape is also to be stretched, or only on its own, depending on the force, an embodiment is recommended which is characterized in that for the stroke drive between the frame and the slide are provided with at least one pneumatic or hydraulic power cylinder, which drives the slide with adjustable stroke and / or controllable force against at least one return spring in the direction of the separation station.
  • a device is better suited for a time-dependent path-dependent control of the stretching process, in which, according to the invention, a motor with a cam disk driven by the motor shaft and a rotatably mounted cam roller running on the cam disk are arranged on the frame for the lifting drive, the cam disk in the Time until the band piece completely cools down to room temperature makes a control revolution and drives the slide against the force of return springs in the direction of the separation station.
  • a force dependency can also be introduced into the control sequence in a very simple manner in that a spring element is connected into the power drive chain between the cam roller and the slide.
  • the control of the expansion process can be optimally adapted to all practical requirements by fitting the cam disc and, if necessary, dimensioning the spring element.
  • a film strip designated 1 runs from a supply roll 2 and first through a heating device 3 which heats the film strip 1 to the deep-drawing temperature.
  • the packs in the film strip 1 are deep-drawn in the respective product to be packaged required or desired shape, the packaging shapes thus formed are not shown in the film strip 1 in the drawing for simplicity.
  • the packs are then filled in a filling station 5 with the products to be packaged, such as tablets, pills or other small parts, and the filled packs are then sealed in a sealing station 6, for which purpose a cover film shown at 7 and fed from a supply roll 8 is welded onto the film strip 1 becomes.
  • the film strip 1 and the cover film 7 are cooled in a cooling station 9 to such an extent that an adverse thermal influence on the product can no longer take place.
  • the filled and sealed packs are punched out of the film strip 1 in a separation station denoted by 10 and are separated in this way.
  • the film strip 1 is transported in cycles through the work stations described, starting from the heating station 3 to the separating station 10, for which purpose a feed station 11 provided in the exemplary embodiment in the transport direction of the film strip 1 is used directly in front of the separating station 10. All these described work stations 3, 4, 5, 6, 9, 10 and 11 and their effects on the film strip 1 are widely known in the prior art and therefore do not require any further description here.
  • the film 1 is cooled by the cooling station 9 between the sealing station 6 and the separating station 10. Apart from this cooling of the film strip 1 in the cooling station 9, the film strip 1 also loses heat on its way between the forming station 4 and the separating station 10 due to radiation and heat conduction to the surroundings and thereby experiences additional cooling, all of which leads to a lengthwise shrinkage of the film strip 1 leads in this way between the forming station 4 and the separating station 10.
  • the feed station 11 is designed in such a way that the cycle steps with which the filled and sealed film strip 1 is transported through the separating station 10 do not result in misalignments of the packs with respect to the sealing tool in the sealing station and with respect to the punchings in the separating station.
  • the machine comes to a standstill, so that the film strip 1 is stronger everywhere between the forming station 4 and the separating station 10, in particular also the piece of strip 12 having the length L, than with continuous machine operation, with a sufficiently long standstill time T of approx. 1 Minute even to room temperature, the resulting shrinkage of the length of the tape piece 12 would be greater than if the feed took place continuously, so that the greater the shrinkage, the less the distance between the successive packs formed in the longitudinal direction of the film strip and before the machine stopped would.
  • the misalignment between the sealing tool and the packs caused by such machine downtimes in the sealing station is remedied by stretching the still warm piece of tape 12 in any case in its already formed length L between the forming station 4 and the separating station 10 to a greater length L 'and starting the transport standstill is held in the stretched state until the machine starts again or the band piece 12 has completely cooled to room temperature, which takes about 1 minute.
  • the stretch is dimensioned such that the difference in length L '_- L at the end of the downtime T or after the band piece has completely cooled (cooling time T') is based only on elastic stretching.
  • the piece of tape 12 is released so that it becomes free of longitudinal tension, it retains an irreversible stretching portion, which is mediated by the stretching process and is just large enough that the piece of tape 12 also has the original length in the cooler or completely cooled state As in the warm state.
  • the band piece 12 is held in the feed station 11 against longitudinal displacements with respect to the separating station 10.
  • a collet in the form of a driver device 13 is provided, which can be moved back and forth parallel to the direction of transport of the film strip 1 by a lifting drive with an adjustable or time-controllable movement stroke and which in its attack on the film strip 1 so is controlled that it only detects the film strip 1 during the standstill or cooling time T or T 'and takes it slip-free, while the feed station 11 holds the piece of tape 12 at the other end against longitudinal displacements.
  • the entraining device 13 comprises a counter plate 15 supporting the film strip 1 and a frame 16 which cross-over the counter plate, which is closed upwards by a cover 17 and carries clamping pieces 18 comprising the edge of the counter plate 15 on both sides, which have dowel pins 19 on the frame 16 are held and clamped by means of clamping screws 20 against the edge of the counter plate 15, wherein they engage in corresponding blind holes 22 of the counter plate 15 with pins 21 inserted into the clamping pieces 18, so that by actuating the clamping screws 20 provided with hand levers 23, the frame 16 is simple and can be quickly attached to or detached from the counter plate 15.
  • the frame 16 forms with the counter plate 15 a passage gap 24 for the film strip 1.
  • a slide 25 is guided parallel to the counter plate 15 and in the longitudinal direction of the film strip 1 and runs with ball sleeves 26 on guide bolts 27 fixed in the frame 16.
  • the adjustment of the frame 16 in the guide direction is carried out by the controllable lifting drive, which in the exemplary embodiment according to FIGS. 2 to 4 is formed by two hydraulically or pneumatically actuatable power cylinders 28, to which the pressure medium is fed through connections 29, not shown.
  • the pistons 30 of these power cylinders 28 work against return springs which are installed within the power cylinder 28 and are therefore not recognizable in the drawing.
  • the cylinder housings of these power cylinders 28 are connected by screws 31 to a bracket 32 which is held on the carriage 25 by screws 33.
  • the pistons 30 of the power cylinder 28 are connected to the frame 16 by screws 34.
  • the stroke of the piston 30 and thus the carriage 25 is adjustable in size, namely with the aid of adjusting screws 35 which are guided in the frame 16 and form a stop for the carriage 25, the carriage 25 under the force of the return springs, not shown Adjusting screws 35 abut so that the pressure-medium-actuated displacement of the slide 25 takes place in the direction of the arrow 14, which corresponds to the movement of the slide 25 in the direction of the forming station 4.
  • clamping shoes 36 which participate in the described slide adjustment and can be adjusted transversely through the passage gap 24 against the counterplate 15 by means of two clamping drives.
  • These tensioning drives are also designed as power cylinders 37, the cylinder housings of which are fastened with screws 38 on the slide side facing the film strip 1, the supply of the pressure medium taking place via the connections 39 shown in FIG. 4 with supply hoses, also not shown.
  • the piston connections emerging from the cylinder housings of these power cylinders 37 are designated by 40.
  • the tensioning shoes 36 are fastened to them by means of screws 41.
  • the tensioning shoes 36 lie next to one another in the width direction of the film strip 1.
  • the pistons 40 carrying the tensioning shoes 36 are also raised against the action of return springs, which are likewise not recognizable in the drawing, because return springs arranged within the power cylinders 37 are lifted off the guide plate 15 or the foil strip 1 lying on it, so that the pressing movement of the tensioning shoes 36 against the .
  • Foil tape 1 through the pressure medium supplied via the connections 39 to the power cylinders 37.
  • the mode of operation of the driver device 13 shown in FIGS. 2 to 4 is such that the tensioning shoes 36 are pressed against the film tape 1 immediately after the film tape transport has come to a standstill, while the carriage is still in its initial position shown in FIGS. 2 to 4.
  • the resulting non-slip frictional connection between the tensioning shoes 36 and the film strip 1 has the consequence that the film strip 1 is carried along by the slide 25 exactly by its respective adjustment path.
  • the size of this adjustment path is preset by the adjusting screws 35 in such a way that it results in an elongation of the band piece 12, which compensates for the additional length reduction of the band piece 12 which would otherwise take place when the machine is at a standstill.
  • the tensioning shoes 36 are lifted off the film band 1 again and the carriage 25 is moved back into its starting position, as a result of which the band piece 12 returns to the longitudinal tension-free state and still the original length L as in the warm state at the start of standstill.
  • the size of the actuating force of the power cylinder 28 also allows the tensile force with which the band piece 12 is stretched to be timed.
  • FIGS. 5 to 7 differs from that according to FIGS. 2 to 4 essentially in that for the linear drive Instead of the power cylinder 28 on the frame 16, a motor 43 with a cam 45 driven by the motor shaft 44 and a rotatably mounted cam roller 46 is arranged on the slide 25, which rolls on the cam 45 while it is driven by the motor 43 at a single control revolution per machine downtime .
  • the cam plate 45 moves the slide 25 against the force of return springs 47 in the direction of the separating station 10 and back after a specific travel-time function, which results in the stretching process required to compensate for the shrinkage of the piece of tape and through, via the cam roller 46 the curve shape of the cam plate 45 can be optimally adapted to all requirements of the practical case.
  • the curve shape in practice it is only necessary to experimentally test the shrinkage behavior and the amount of elongation required to compensate it for the machine under operating conditions for a few values of the downtime, and then to interpolate the curve shape on the cam disc between these few selected states. what can be done easily and without much time.
  • FIG. 8 differs from that of FIGS. 5 to 7 essentially only in that the cam roller 46 is mounted on a tappet 48 which is guided against a spring member 49 at 50 on the carriage 25 so as to be longitudinally displaceable. Via this spring member 49, the actuating force on the slide 25 and thus the tensile force with which the stretching process is carried out on the band piece 12 can also be influenced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Package Closures (AREA)
  • Laminated Bodies (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Claims (11)

1. Procédé de compensation de la longueur d'une bande en forme de feuille (1) réalisée en un matériau pouvant se contracter lors d'un refroidissement, notamment une matière thermoplastique, dans des machines servant à fabriquer et à séparer individuellement des emballages, qui sont formés par emboutissage dans la bande en forme de feu ille entraînée à cet effet dans la direction longitudinale à travers un poste de formage (4), un autre poste de travail (6), notamment un poste de thermosou- dage, et un poste de séparation (10) de la machine et sont découpés éventuellement après remplissage etthermosoudage, et selon lequel la bande en forme de feuille (1) est chauffée avant l'emboutissage et subit un refroidissement et une contraction sur son trajet de déplacement entre le poste de formage (4) et le poste de séparation (10), et selon lequel des modifications des dimensions des emballages et de l'intervalle entre les emballages au niveau de l'autre poste de travail (6) sont absorbées ou compensées de façon automatique, sans perturbation de l'opération de travail, jusqu'à une valeur de tolérance maximale conditionnée par l'agencement, caractérisé en ce qu'au début de l'arrêt de l'entraînement, un morceau (12) de la bande en forme de feuille chaude (1), qui possède la longueur L, s'étend en aval du poste de formage (4) dans la direction d'entraînement, et ce au moins jusqu'en arrière de l'autre poste de travail (6) et au maximum jusqu'au poste de séparation (10), est bloqué en position contre tout déplacement au niveau de l'une de ses extrémités et est allongé par traction au niveau de son autre extrémité jusque sur une longueur supérieure L', et est maintenu à l'état allongé pendant le temps d'arrêt T ou même seulement jusqu'au refroidissement complet du morceau de bande (12), dans la mesure où cette durée de refroidissement T' serait inférieure au temps d'arrêt T, l'allongement étant dimensionné de manière que la différence de longueur L'- L à la fin du temps d'arrêt ou de la durée de refroidissement T,T' soit basée essentiellement encore uniquement sur un allongement purement élastique du morceau de bande (12) possédant encore toujours la longueur initiale L dans son état à nouveau détendu sans l'application d'une tension longitudinale, et que le morceau de bande (12) contient un nombre d'emballages situés les uns à la suite des autres sur sa longueur L, tel que les variations, provoquées par l'opération transitoire d'allongement, des dimensions des emballages et surtout des intervalles entre les emballages possèdent au maximum une valeur égale à la valeur de tolérance maximale admissible pour l'opération de travail dans l'autre poste de travail (6).
2. Procédé selon la revendication 1, caractérisé en ce que la différence de longueur L'-L du morceau de bande allongé (12) est supérieure au raccourcissement apparaissant par contraction dans le morceau de bande (12) dans le cas de son état exempt de toute contrainte longitudinale pendant le temps d'arrêt ou la durée de refroidissement T, T' et est maintenue sensiblement constante pendant le temps d'arrêt ou la durée de refroidissement T, T'.
3. Procédé selon la revendication 1, caractérisé en ce que la valeur de la différence de longueur L'- L du morceau de bande allongé (12) pendant le processus de refroidissement intervenant pendant le temps d'arrêt T est réglée dans le temps en fonction du comportement, qui dépend de la température, des propriétés du matériau de la bande, qui déterminent l'élasticité, la contraction et l'étirage du morceau de bande (12), de telle sorte qu'à chaque instant lors du processus de refroidissement, ladite valeur est basée essentiellement uniquement sur un allongement purement élastique du morceau de bande (12) imaginé comme étant détendu à cet instant et possédant encore toujours la longueur initiale L dans son état alors exempt de toute contrainte longitudinale.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le morceau de bande (12) est soumis à un blocage en position contre tout déplacement au niveau de son extrémité située entre l'autre poste de traitement (6) et le poste de séparation (10) et est soumis au déplacement de traction pour son allongement, au niveau de son extrémité située à proximité immédiate du poste de formage (4).
5. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 4, dans une machine dans laquelle la bande en forme defeuille (1 ) traverse successivement un poste de chauffage (3), le poste de formage (4), l'autre poste de travail (6) permettant d'obtenir la valeur de tolérance pour l'opération de travail appliquée à la bande, notamment un poste de thermoformage, un poste d'avance (11 ) entraînant la bande en forme de feuille (1 ) et le poste de séparation (10), et dans laquelle le poste d'avance (11) est disposé dans l'intervalle entre le poste de formage (4) et le poste de séparation (10), immédiatement en amont de ce dernier, caractérisé en ce que pour la bande en forme de feuille (1) il est prévu une pince de serrage (13) qui est disposée dans la direction de son entraînement en aval du poste de chauffage (3), directement en amont, dans ou en aval du poste de formage (4), et dont l'application sur la bande en forme de feuille (1 ) peut être commandée, et que dans le cas d'un arrêt de l'entraînement, la pince de serrage (13) et le poste d'avance (11 ) saisissent la bande en forme de feuille (1 ) et que la pince de serrage (13) ou le poste d'avance (11) exécutent le déplacement de traction servant à allonger le morceau de bande (12).
6. Dispositif selon la revendication 5, caractérisé en ce que la pince de serrage (13) est réalisée sous la forme d'un dispositif d'entraînement, qui est déplaçable en va-et-vient, lors d'un arrêt de l'entraînement, au moyen d'un dispositif d'entraînement de levage, dans lequel le déplacement et/ ou la force peuvent être commandés, et dont l'application sur la bande en forme de feuille (1 ) peut être commandée de telle sorte que ce dispositif saisit la bande en forme de feuille (1 ) uniquement pendant le temps d'arrêt ou bien jusqu'au refroidissement complet du morceau de bande (12) et l'entraîne sans glissement, et que dans le poste d'avance (11), la bande en forme de feuille (1 ) est maintenue fermement contre tout déplacement longitudinal, lors de l'arrêt d'entraînement.
7. Dispositif selon la revendication 6, caractérisé en ce que le dispositif d'entraînement (13) possède un plateau antagoniste (15) soutenant la bande en forme de feuille (1), et un cadre s'engageant transversalement au-dessus du plateau antagoniste (15) et formant, avec ce dernier, une fente de passage (24) pour la bande en forme de feuille (1), qu'un chariot (25) est guidé de manière à être déplaçable dans le cadre (16) parallèlement au plateau antagoniste (15) et dans la direction longitudinale de la bande en forme de feuille (1) et peut être déplacé en va-et-vient dans la direction de guidage par le dispositif d'entraînement de levage, et que sur le chariot (25) il est prévu au moins un patin de serrage (40) qui participe au déplacement du chariot et peut être appliqué, transversalement à travers la fente de passage (24), contre le plateau antagoniste (15) au moyen d'un dispositif d'entraînement de serrage (37), porte une garniture de friction (42) tournée vers la bande en forme de feuille (1 ) et, lorsqu'il est dans son état repoussé contre la bande en forme de feuille (1 ), entraîne cette dernière selon une liaison de friction sans glissement, conformément au déplacement du chariot.
8. Dispositif selon la revendication 7, caractérisé en ce que le dispositif d'entraînement de serrage (37) est formé par des vérins, dont les pistons peuvent être actionnés par voie hydraulique ou pneumatique à l'encontre de ressorts de rappel.
9. Dispositif selon la revendication 7 ou 8, caractérisé en ce qu'il est prévu, comme dispositif d'entraînement de levage entre le cadre (16) et le chariot (25), au moins un vérin pneumatique ou hydraulique (28), qui entraîne le chariot (25) avec une course réglable et/ou avec une force pouvant être commandée selon un déplacement l'écartant du poste de séparation (10).
10. Dispositif selon la revendication 7 ou 8, caractérisé en ce que, comme dispositif d'entraînement de levage, il est prévu sur le cadre (16) un moteur (43) comportant un disque à came (45) entraîné par l'arbre (44) du moteur et, sur le chariot (25), un galet de came (46) monté rotatif et circulant sur le disque à came (45), le disque à came (45) exécutant une rotation de commande pendant l'intervalle de temps s'étendant jusqu'au refroidissement complet du morceau de bande à la température ambiante (durée de refroidissement T') et entraîne le chariot (25) selon un déplacement l'écartant du poste de séparation (10), à l'encontre de la force de ressorts de rappel (47).
11. Dispositif selon la revendication 10, caractérisé en ce qu'un aimant formant ressort (49) est inséré dans la chaîne d'entraînement mécanique entre le galet de came (46) et le chariot (25).
EP87101084A 1986-01-29 1987-01-27 Procédé et dispositif de compensation de la longueur d'une bande d'un matériau qui se rétracte par refroidissement dans des machines pour fabriquer et pour détailler des emballages Expired EP0234307B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101084T ATE39452T1 (de) 1986-01-29 1987-01-27 Verfahren und vorrichtung zum laengenausgleich eines folienbandes aus einem bei abkuehlung schrumpfenden werkstoff bei maschinen zum herstellen und vereinzeln von packungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3602604 1986-01-29
DE3602604 1987-01-29

Publications (2)

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EP0234307A1 EP0234307A1 (fr) 1987-09-02
EP0234307B1 true EP0234307B1 (fr) 1988-12-28

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EP87101084A Expired EP0234307B1 (fr) 1986-01-29 1987-01-27 Procédé et dispositif de compensation de la longueur d'une bande d'un matériau qui se rétracte par refroidissement dans des machines pour fabriquer et pour détailler des emballages

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Country Link
US (1) US4894977A (fr)
EP (1) EP0234307B1 (fr)
AT (1) ATE39452T1 (fr)
DE (1) DE3760028D1 (fr)
WO (1) WO1993012972A1 (fr)

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US5269123A (en) * 1989-12-29 1993-12-14 Massimo Marchesini Device for sealing a film onto a blister band, particularly a polypropylene band
US5205110C1 (en) * 1990-12-12 2001-05-15 Dec Int Servo motor operated indexing motion packaging machine and method
DE19504219C1 (de) * 1995-02-09 1996-06-05 Bosch Gmbh Robert Verpackungsmaschine
DE19618448C1 (de) * 1996-05-08 1997-09-25 Bosch Gmbh Robert Thermoformanlage
KR100727422B1 (ko) * 1999-11-01 2007-06-13 가부시키가이샤 유야마 세이사쿠쇼 약제분포장치
DE10302723A1 (de) * 2003-01-23 2004-08-05 Iwk Verpackungstechnik Gmbh Verfahren zur Steuerung einer Blister-Verpackungsmaschine
DE10302726A1 (de) * 2003-01-23 2004-08-05 Iwk Verpackungstechnik Gmbh Verfahren zur Steuerung einer Blister-Verpackungsmaschine
EP1747145B1 (fr) * 2004-05-07 2012-07-11 I.M.A. INDUSTRIA MACCHINE AUTOMATICHE S.p.A. Emballeuse thermoformeuse permettant de produire des emballages alveoles
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US7340871B1 (en) * 2006-03-31 2008-03-11 Alkar-Rapidpak, Inc. Web packaging system with ergonomic tooling change
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US8499536B2 (en) 2009-05-18 2013-08-06 Alkar-Rapidpak-Mp Equipment, Inc. Apparatuses and methods for assisted tooling extraction
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Also Published As

Publication number Publication date
EP0234307A1 (fr) 1987-09-02
WO1993012972A1 (fr) 1993-07-08
DE3760028D1 (en) 1989-02-02
US4894977A (en) 1990-01-23
ATE39452T1 (de) 1989-01-15

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