EP0524196B1 - Mecanisme vireur pour couvercles filetes et procede de montage de couvercles filetes sur des conteneurs - Google Patents

Mecanisme vireur pour couvercles filetes et procede de montage de couvercles filetes sur des conteneurs Download PDF

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Publication number
EP0524196B1
EP0524196B1 EP91905499A EP91905499A EP0524196B1 EP 0524196 B1 EP0524196 B1 EP 0524196B1 EP 91905499 A EP91905499 A EP 91905499A EP 91905499 A EP91905499 A EP 91905499A EP 0524196 B1 EP0524196 B1 EP 0524196B1
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EP
European Patent Office
Prior art keywords
moment
closing
turning
torque
angle
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.)
Revoked
Application number
EP91905499A
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German (de)
English (en)
Other versions
EP0524196A1 (fr
Inventor
Günter Spatz
Wolfhard Schwarz
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.)
Alcoa Deutschland GmbH Verpackungswerke
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Alcoa Deutschland GmbH Verpackungswerke
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Application filed by Alcoa Deutschland GmbH Verpackungswerke filed Critical Alcoa Deutschland GmbH Verpackungswerke
Publication of EP0524196A1 publication Critical patent/EP0524196A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/20—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps
    • B67B3/2073—Closing bottles, jars or similar containers by applying caps by applying and rotating preformed threaded caps comprising torque limiting means
    • B67B3/208—Electrical means responsive to the torque applied and acting on motor control means, e.g. strain gauges or power measurement means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/26—Applications of control, warning, or safety devices in capping machinery

Definitions

  • the invention relates to a turning device for screw caps according to the preamble of claim 1 and a method for applying screw caps to containers according to the preamble of claim 8.
  • a rotating device for screw closures and a method for applying such closures to containers are known (DE-OS 37 15 935).
  • the known rotating device is used to screw closures onto containers and to maintain a predetermined closing torque.
  • a torque limiting device prevents the desired torque from being exceeded.
  • Control circuit the drive current received by the drive motor of the rotating device and triggers control signals by which the drive current of the drive motor is interrupted when the current rises to a specific value which corresponds to a specific torque of the unscrewed closure. This directly affects the energy supply of the drive.
  • a rotary device for screw closures which shows a drive, a control device influencing the energy supply of the drive, a torque sensor and a comparison of the currently achieved angle of rotation with a predeterminable angle of rotation enabling the angle of rotation sensor.
  • control device has at least one comparator circuit which compares the closing torque currently achieved with a predeterminable value for the moment, that the control device only detects the angle of rotation after reaching a predetermined closing torque and that the control device is designed so that the angle of rotation by the the screw cap is rotated further after reaching the certain closing torque, can be limited to a predeterminable value, a defined starting point for the further measurements during the closing process is established.
  • the angle of rotation is detected by which the screw cap is rotated by the rotating device.
  • the detection of the angle of rotation after reaching the application torque ensures a particularly sensitive closure of the container. This can cause damage exclude the mouth area with high security and ensure a very exact adherence to a desired opening torque. In particular, this leads to a particularly sensitive setting of the desired closing torque, the predetermined opening torque being able to be adhered to very precisely.
  • the torque acting on the screw closure is detected with the aid of the control device serving as a torque limiting device.
  • the current supplied to the drive of the rotary device or the voltage applied to the drive is detected. Since the power consumed by the drive is proportional to the voltage or current, the instantaneous torque can be determined from the instantaneous values of the current or the voltage. This moment detection is particularly easy to carry out.
  • the change in the tightening torque over time is recorded. If, therefore, the closure suddenly catches or cant when screwing it on, which is recognized by a rapid increase in the torque per unit of time, the closing process can be interrupted so that the mouth region of the container is not damaged.
  • the closure is screwed onto the container until a predeterminable closing torque (contact torque) is reached, the instantaneous closing torque being compared with a predeterminable torque value and then the angle of rotation being recorded and the instantaneous angle of rotation being recorded with a predeterminable angle of rotation is compared.
  • a predeterminable closing torque contact torque
  • the instantaneous closing torque being compared with a predeterminable torque value and then the angle of rotation being recorded and the instantaneous angle of rotation being recorded with a predeterminable angle of rotation is compared.
  • This defines a defined initial state of the closing process.
  • the closure is then rotated further by a predeterminable angle of rotation relative to the container. This leads to a secure setting of the desired closing torque, with damage to the muzzle being practically excluded.
  • the change in the tightening torque over time is also detected after the application torque has been reached. Faults in the process during this phase, for example tilting of the closure on the container, can thus be reliably detected.
  • an embodiment of the method is preferred in which the screw cap is screwed on until a high limit torque which is above the closing moment is reached.
  • the closure is then rotated through a predeterminable angle of rotation in the opposite direction in order to set the desired closing torque - and thus also a specific opening torque.
  • containers can also be closed, the threads of which have minor damage and in which an increased closing torque must therefore be applied in order to screw the closure onto the container.
  • the illustration shows a container 1, here a bottle, onto which a screw cap 3 made of plastic is to be screwed.
  • the closure is grasped by a sketched sealing cone 5 of a rotating device 7 and placed on the container 1. It is irrelevant to the invention whether the sealing cone 5 is rotated relative to the container 1 or whether the sealing cone is fixed and the container 1 is rotating.
  • the closing cone 5 is set in rotation here by a motor 9 serving as a drive, which is supplied with current or voltage via a switching device 11.
  • a sensor 13 is provided between the power supply and the switching device, which detects the current or the voltage. In principle, it is also possible to provide the sensor 13 between the switching device 11 and the motor 9.
  • the closing cone 5 is assigned a rotation angle sensor 17 which detects the angular position of the cone.
  • the signals of the current or voltage sensor 13, the torque sensor 15 and those of the angle of rotation sensor 17 are fed to a control device 19 which evaluates and processes the measured values.
  • these signals are fed to a comparator circuit 21.
  • This also receives, via suitable actuators, predeterminable values M1, M2, M3, M7 and Mö for given tightening torques as well as certain values W and Wl for given rotation angles.
  • the output signals of the comparator circuit 21 are fed to the control device 19.
  • the control device 19 is connected to the switching device 11 of the motor 9 via a control line 23. It is also provided with a differentiator 25 to which the output signals of the torque and angle sensors are fed.
  • the sensor 13 which detects the supply voltage and / or the supply current of the motor 9, serves to determine the torque currently applied by the motor, it being assumed that the torque is proportional to the voltage or the current. By detecting the changes in the supply voltage or the supply current of the motor over time, changes in the torque over time can also be determined. In this case, the torque sensor 15 described above could be omitted.
  • the device and the method are suitable for closing any container. It is preferred to use the device or the method for closing bottles with the aid of plastic closures.
  • the bottles can be made of glass or plastic, for example PET.
  • the screw cap 3 is introduced into the sealing cone 5 in any manner, for example in a so-called pick process.
  • the sealing cone 5 with the screw cap 3 clamped therein is then arranged over a container 1 to be sealed.
  • the sealing cone 5 rotates with respect to the fixed container 1.
  • the rotating screw cap 3 is now placed on the container 1.
  • a corresponding switching signal is sent from the control device 19 via the control line 23 to the switching device 11, which, for example, has an electronic switch or a relay, so that the motor 9 is supplied with energy.
  • the switching device 11 which, for example, has an electronic switch or a relay, so that the motor 9 is supplied with energy.
  • the closing torque or tightening torque exerted by the motor 9 on the closing cone 5 or the screw closure 3 is recorded.
  • the instantaneous moment can be determined on the one hand with the help of the sensor 13, which measures the energy supply to the motor 9 delivered current or the applied voltage. It is also possible to directly record the torque transmitted from the motor 9 to the closing cone 5 with the aid of the torque sensor 15.
  • the output signal of the sensor 13 or the torque sensor 15 is fed to the control device 19 but also to the comparator 21.
  • M1 the so-called application torque.
  • the rotation angle sensor 17 is activated via the control device 19.
  • the control device 19 now evaluates the signals of the rotation angle sensor.
  • the current angle of rotation of the closing cone 5 or the closure 3 is compared by means of the comparator 21 with a predetermined angle value W.
  • the control device 19 outputs a signal to the switching device 11 via the line 23, so that the latter interrupts the energy supply to the motor 9. This prevents further twisting of the closure.
  • the control device 19 can, for example, be provided with a timing element which specifies a specific time within which the application or closing torque must be reached. If this is not the case, a control signal is emitted via a signal line S and the container 1 currently located below the sealing cone 5 is separated from the sealing system.
  • a specific angle of rotation can also be specified. This means that the closure is screwed onto the container by one full revolution, for example. After that, the application torque must be reached. If this is not the case, it is concluded that there is damage to the container or the closure. The corresponding container is discarded.
  • the closing cone 5 is rotated further until the instantaneous rotation angle reaches the value W entered into the comparator 21.
  • the predetermined angle of rotation W is determined on the basis of experiments. This ensures that the desired closing torque M2 is reached. With such a predetermined closing moment, it is ensured on the one hand that the container is closed in a pressure-tight manner by the screw closure 3. On the other hand, it is ensured that the opening torque Mö, the torque required to open the container for the first time, is also maintained.
  • the torque sensor 15 can be used to further monitor the instantaneous tightening torque and to compare it in the comparator circuit 21 with a second torque value, a predetermined maximum value M3. If this maximum value M3 is reached during the further rotation of the closure, it can be concluded that there is a muzzle error. If, for example, the thread on the outside of the container is jagged, it cuts into the inner wall or into the thread of the plastic screw cap 3. The torque required to turn the shutter further increases so much that the predetermined maximum value M3 is exceeded.
  • the switching device 11 is actuated via the control line 23 so that the motor 9 does not drive the closing cone 5 any further. This prevents excessive torque from acting on the mouth area of the container 1 and causing damage.
  • the maximum tightening torque M3 could also be exceeded before the desired angle of rotation W is reached if the closure 3 jams on the thread of the container after the application torque M1 has been reached. Even then, on the one hand, it would not be ensured that the seal provided in the closure tightly seals the container pressure, on the other hand, if the closure process is continued, an excessive moment could act on the mouth region of the container due to the tilting and lead to damage.
  • a differentiator 25 is provided within the control device 19, which determines the time derivative of the output signal of the torque sensor 15 but also of the output signal of the angle of rotation sensor 17.
  • the opening torque, the torque Mö required for the first opening of the container can be set to a desired value.
  • additional security is also achieved in this way by recognizing a tilting of the closure or damage to the thread of the closure or of the container and the containers concerned being able to be separated out.
  • the method can be modified in that the screw cap 3 is screwed on by the motor 9 until the torque sensor 15 and the comparator 21 determine that a torque limit value Mg has been reached which is above the closing torque M2.
  • container 1 with small thread damage can also be securely closed. Basically, it should be noted that in the event of thread damage, the ultimately desired closing torque M2 is reached before the closure has assumed its final position on the container thread, because the friction creates additional frictional forces.
  • a reversal is carried out after the closure has been screwed on up to the limit moment Mg by a control signal from the control device 19 which is fed via line 23 to the switching device 11 the energy supply to the motor 9 is reached. This then turns in the opposite direction.
  • the rotation angle sensor 17 is activated simultaneously with this control signal. Its output signals are compared in the comparator 21 with an angle value W1 assigned to the left rotation or the opening movement. As soon as the predetermined angle of rotation, which can be, for example, in the range from 10 ° to 15 °, is reached, i.e.
  • the switching device 11 is activated by a control signal from the control device 19 via the control line 23 controlled that the motor 9 is disconnected from the power supply. As a result, the opening movement of the closure 3 is ended.
  • the switching device 11 can be controlled so that an energy reversal or polarity reversal of the energy supply to the motor 9 is achieved, it is possible that the rotating device of the type described above is controlled so that when an error occurs during the closing of a container initially reversed the direction of rotation and the closure is unscrewed from the container. Then the closing process is started again. Should now be a proper one Set the closing state, the container is left in the normal manufacturing process. Only when an error occurs again, for example because the closure or the mouth area of the container has been destroyed, is the container discharged from the process. In this way, rejects can be reduced to a minimum, which means that further processing steps have to be carried out outside the normal workflow. A further improvement in the closing process can thus be achieved by reversing the energy supply.
  • closure 3 Due to the possibility of energy reversal, it is also possible to turn the closure 3 against the closure direction after the first placement on the container 1. In this way, an optimal alignment of the thread provided in the closure with respect to the container thread can take place. After a certain left turn, the closure engages on the container, which can be determined, for example, by the axial movement of the closure relative to the container. This movement can be sensed by a suitable displacement sensor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Jars (AREA)
  • Closures For Containers (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (13)

  1. Appareil de rotation de bouchons filetés, en particulier en plastique, pour récipients, comportant un dispositif moteur, un dispositif de commande agissant sur l'apport d'énergie de ce dispositif moteur et comprenant un capteur de couple et un capteur d'angle de rotation permettant la comparaison de l'angle de rotation atteint à un instant donné à un angle de rotation fixé, caractérisé par le fait que le dispositif de commande (19) présente au moins un circuit comparateur (21) qui compare le couple de bouchage atteint à un instant donné à une valeur fixée du couple (M1, M2, M3), que le dispositif de commande (19) saisit l'angle de rotation seulement après qu'a été atteint un couple déterminé de bouchage (M1), et que le dispositif de commande (19) est conçu de façon que l'angle de rotation duquel le bouchon fileté (3) est encore tourné après que le couple déterminé de bouchage (M1) a été atteint peut être limité à une valeur fixée.
  2. Appareil de rotation selon la revendications 1, caractérisé par le fait que le dispositif de commande (19) présente pour la saisie du couple instantané au moins un dispositif de saisie de courant et/ou de tension associé à l'apport d'énergie du dispositif moteur.
  3. Appareil de rotation selon l'une des revendications 1 et 2, caractérisé par le fait que le dispositif de commande (19) saisit la variation dans le temps du couple de bouchage.
  4. Appareil de rotation selon l'une des revendications 1 à 3, caractérisé par le fait que le dispositif de commande (19) présente pour la saisie du couple de bouchage et/ou de la variation dans le temps de celui-ci au moins un capteur (13) pour la détermination du courant d'alimentation et/ou de la tension d'alimentation du dispositif moteur du dispositif de bouchage (7).
  5. Appareil de rotation selon l'une des revendications 1 à 4, caractérisé par le fait qu'au dispositif de commande (19) est adjoint un circuit d'inversion de l'apport d'énergie.
  6. Appareil de rotation selon la revendication 5, caractérisé par le fait qu'au circuit d'inversion de l'apport d'énergie est adjoint un capteur de couple (15) qui saisit le couple d'ouverture (Mö).
  7. Appareil de rotation selon l'une des revendications 1 à 6, caractérisé par le fait que le dispositif de commande (9) est un circuit régulateur.
  8. Procédé d'application de bouchons filetés, en particulier en plastique, sur des récipients, en particulier au moyen d'un appareil de rotation selon l'une des revendications 1 à 9, procédé dans lequel l'angle instantané de rotation est comparé à un angle de rotation fixé, caractérisé par le fait que le bouchon fileté (3) est vissé jusqu'à ce que soit atteint un couple de bouchage fixé (couple d'application M1), le couple instantané de bouchage étant comparé à une valeur de couple fixée (M2) et l'angle de rotation étant ensuite saisi, et que l'angle instantané de rotation est comparé à un angle de rotation fixé (W).
  9. Procédé selon la revendication 8, caractérisé par le fait que le couple agissant sur le bouchon fileté (3) est saisi à l'aide d'un capteur de couple (15) ou au moyen d'un dispositif de saisie de courant et/ou de tension associé à l'apport d'énergie du dispositif moteur de l'appareil de rotation.
  10. Procédé selon l'une des revendications 8 et 9, caractérisé par le fait qu'après une inversion de l'apport d'énergie, le couple instantané d'ouverture est saisi dès que l'angle de rotation est supérieur à zéro degré.
  11. Procédé selon la revendication 8, caractérisé par le fait que comme couple fixé de bouchage est choisi un couple limite (Mg) supérieur au couple désiré de bouchage (M2), et qu'après que ce couple limite a été atteint, le bouchon est tourné d'un angle fixé en sens contraire du sens de bouchage.
  12. Procédé selon l'une des revendications 8 à 11, caractérisé par le fait que pour les récipients (1) sur lesquels sont constatées de mauvaises valeurs d'angle et/ou de couple est déclenchée au moins une nouvelle opération de bouchage.
  13. Procédé selon l'une des revendications 8 à 12, caractérisé par le fait que les récipients (1) pour lesquels ont été constatées de mauvaises valeurs d'angle et/ou de couple sont retirés.
EP91905499A 1990-04-09 1991-03-02 Mecanisme vireur pour couvercles filetes et procede de montage de couvercles filetes sur des conteneurs Revoked EP0524196B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4011398 1990-04-09
DE4011398A DE4011398C2 (de) 1990-04-09 1990-04-09 Vorrichtung und Verfahren zum Aufbringen von Schraubverschlüssen auf Behälter
PCT/EP1991/000394 WO1991015422A1 (fr) 1990-04-09 1991-03-02 Mecanisme vireur pour couvercles filetes et procede de montage de couvercles filetes sur des conteneurs

Publications (2)

Publication Number Publication Date
EP0524196A1 EP0524196A1 (fr) 1993-01-27
EP0524196B1 true EP0524196B1 (fr) 1994-10-05

Family

ID=6404038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91905499A Revoked EP0524196B1 (fr) 1990-04-09 1991-03-02 Mecanisme vireur pour couvercles filetes et procede de montage de couvercles filetes sur des conteneurs

Country Status (7)

Country Link
US (1) US5321935A (fr)
EP (1) EP0524196B1 (fr)
KR (1) KR970009389B1 (fr)
AT (1) ATE112536T1 (fr)
DE (1) DE4011398C2 (fr)
ES (1) ES2066427T3 (fr)
WO (1) WO1991015422A1 (fr)

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DE102021004966B3 (de) 2021-10-04 2023-04-06 Imagine Engineering GmbH Verfahren und Vorrichtung zum Anbringen eines Siegelelements und eines, ein Muttergewinde aufweisenden, Schraubdeckels an die Mündung eines Behälters
WO2023110541A3 (fr) * 2021-12-14 2023-08-24 Tetra Laval Holdings & Finance S.A. Procédé de contrôle pour la pose de capsules et porte-capsule

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DE102018221034A1 (de) * 2018-12-05 2020-06-10 Krones Ag Vorrichtung und verfahren zum verschliessen einer flasche mit drehmomentmessung
IT202100026087A1 (it) * 2021-10-12 2023-04-12 Gd Spa Macchina ghieratrice e relativo metodo di controllo

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DE102021004966B3 (de) 2021-10-04 2023-04-06 Imagine Engineering GmbH Verfahren und Vorrichtung zum Anbringen eines Siegelelements und eines, ein Muttergewinde aufweisenden, Schraubdeckels an die Mündung eines Behälters
EP4163212A1 (fr) 2021-10-04 2023-04-12 IMAGINE Engineering GmbH Procédé et dispositif pour appliquer un élément de scellement et un couvercle fileté présentant un filetage écrou à l'embouchure d'un récipient
WO2023110541A3 (fr) * 2021-12-14 2023-08-24 Tetra Laval Holdings & Finance S.A. Procédé de contrôle pour la pose de capsules et porte-capsule
EP4209447A3 (fr) * 2021-12-14 2023-10-18 Tetra Laval Holdings & Finance S.A. Procédé de montage d'application de capuchon et porte-capuchon

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ATE112536T1 (de) 1994-10-15
ES2066427T3 (es) 1995-03-01
EP0524196A1 (fr) 1993-01-27
KR970009389B1 (ko) 1997-06-12
WO1991015422A1 (fr) 1991-10-17
US5321935A (en) 1994-06-21
DE4011398C2 (de) 1994-09-22
DE4011398A1 (de) 1991-10-10

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