EP4074649B1 - Verschlussvorrichtung und verschlussverfahren - Google Patents

Verschlussvorrichtung und verschlussverfahren Download PDF

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Publication number
EP4074649B1
EP4074649B1 EP21167767.9A EP21167767A EP4074649B1 EP 4074649 B1 EP4074649 B1 EP 4074649B1 EP 21167767 A EP21167767 A EP 21167767A EP 4074649 B1 EP4074649 B1 EP 4074649B1
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EP
European Patent Office
Prior art keywords
capping
sleeve
support member
container
chamber
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EP21167767.9A
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English (en)
French (fr)
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EP4074649A1 (de
Inventor
Stefano BERNINI
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Sidel Participations SAS
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Sidel Participations SAS
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Priority to EP21167767.9A priority Critical patent/EP4074649B1/de
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    • 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
    • B67B3/2066—Details of capping heads
    • 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

Definitions

  • the present invention relates to a capping device of the type according to the preamble of claim 1 configured for capping containers containing a pourable product, preferably a pourable food product.
  • pourable product such as liquid products (e.g. mineral oils, lubricant oils, detergents, soap) or food liquid products (e.g. water, juice, wine, soft drinks, yogurt, milk) are sold in containers having different shapes, dimensions and materials.
  • liquid products e.g. mineral oils, lubricant oils, detergents, soap
  • food liquid products e.g. water, juice, wine, soft drinks, yogurt, milk
  • the most common used material is plastic. Accordingly, the most common containers are plastic bottles, which are filled with the pourable product during a filling process and then undergo a capping process carried out by means of a capping machine.
  • the known capping machines are part of more complex handling assemblies adapted to carry out a series of successive operations on the above containers, such as forming, filling, capping and labelling.
  • a capping machine of the known type comprises a conveyor, typically a carousel rotatable about a vertical axis and including a plurality of peripheral receiving seats for receiving and supporting respective containers, and a plurality of capping devices, usually arranged in vertical alignment with the respective receiving seats and selectively activatable to apply and close a cap onto at least one container at a time, for example a screw cap or a snap-on cap.
  • the receiving seats and the capping devices are uniformly distributed about the carousel axis and are carried in rotation by the carousel itself.
  • Each capping device usually comprises a capping head including a control rod, drivable by an actuator, such as a motor or a cam, and a capping portion carried by the control rod at a free end thereof facing the respective receiving seat.
  • a capping head including a control rod, drivable by an actuator, such as a motor or a cam, and a capping portion carried by the control rod at a free end thereof facing the respective receiving seat.
  • the capping portion is configured to grab and retain one cap to be applied at a time and is movable towards and away from the respective receiving seat to apply such cap to the respective container supported by the receiving seat.
  • a capping machine of the known type further comprises an infeed unit, such as an infeed star wheel, configured to feed containers to be capped to the carousel, and an outfeed unit, such as an outfeed star wheel, configured to receive capped containers from the carousel.
  • an infeed unit such as an infeed star wheel
  • an outfeed unit such as an outfeed star wheel
  • the containers are pressurized, before capping, during their advancement on the infeed star wheel.
  • the capping machine comprises means for injecting a predetermined amount of pressurizing agent, normally liquid nitrogen, inside the containers already filled with the pourable product. Since this process is carried out at atmospheric pressure, the liquid nitrogen then naturally passes into gaseous state, expanding its volume by several times.
  • pressurizing agent normally liquid nitrogen
  • the capping machines and the capping devices of the above-mentioned type are still open to further improvements, in particular as to simplify the pressurization process of the containers.
  • number 1 indicates as a whole a capping machine configured for capping containers 2, i.e. by at least applying caps 3 onto or to the containers 2.
  • the containers contain or are filled with a pourable product, preferably a pourable food product.
  • containers 2 made of plastic, for example plastic bottles having a main body, a base and an upper end opening opposite to the base, arranged at a neck portion of the container and adapted to receive a cap 3.
  • caps 3 are snap-on caps.
  • caps 3 could be screw caps.
  • capping machine 1 comprises:
  • capping devices 6 are mounted to a peripheral portion of carousel 4 and are equally angularly distributed about axis X.
  • capping machine 1 further comprises an outfeed conveyor, preferably an outfeed star wheel 5a, configured to receive the capped containers 2 from carousel 4.
  • an outfeed conveyor preferably an outfeed star wheel 5a, configured to receive the capped containers 2 from carousel 4.
  • capping device 6 configured to apply at least one cap 3 to at least one container 2.
  • capping device 6 configured to apply at least one cap 3 to at least one container 2.
  • all the structural and functional features described hereinafter for such capping device 6 are equally applicable to all capping devices 6 of capping machine 1.
  • capping device 6 comprises:
  • support member 7 comprises a gripper 10 ( Figures 5a, 5b ) mounted to a peripheral ring 4a of carousel 4, defining part of said peripheral portion, and configured for gripping a neck portion 2a of container 2.
  • gripper 10 has a pair of arms 11 movable between an open position and a closed position for surrounding and gripping neck portion 2a.
  • Capping head 8, and therefore capping device 6, is mounted to a peripheral ring 4b, spaced from peripheral ring 4a along axis X, and has a capping portion 12 with a seat 12a for receiving and retaining the cap 3, preferably coaxial with axis A.
  • the capping portion 12 is axially movable towards and away from support member 7 to apply cap 3 to container 2.
  • capping head 8 comprises a control rod 13 extending along axis A, carrying capping portion 12 at one axial end thereof, and axially movable towards and away from support member 7 in order to cause the axial movement of capping portion 12.
  • control rod 13 is fitted to an actuator which drives, in use, the movement of the control rod 13 itself, preferably under control of a control unit (not shown).
  • Capping device 6 further comprises a tubular sleeve 14 having a longitudinal axis, in particular having axis A, i.e. being coaxial to axis A, and including a first axial opening 15 facing support member 7 and a second axial opening 16 opposite the first axial opening 15.
  • first axial opening 15 defines a lower opening of sleeve 14 and second axial opening 16 defines an upper opening of sleeve 14 ( Figures 3A-3C ).
  • second axial opening 16 has a diameter smaller than the diameter of first axial opening 15, in particular it has a diameter substantially equal to the diameter of control rod 13.
  • Control rod 13 slidably engages second axial opening 16, substantially in a fluid-tight manner, thereby closing second axial opening 16 substantially in a fluid-tight manner.
  • a known gasket (not shown) is fitted to sleeve 14 so as to be radially interposed between second axial opening 16 and control rod 13, thus obtaining such fluid-tight coupling.
  • capping head 8 engages second axial opening 16 thereby closing second axial opening 16.
  • Capping portion 12 is arranged within sleeve 14 and is axially movable through sleeve 14 for applying cap 3 to container 2.
  • capping portion 12 is always arranged inside sleeve 14 and is axially movable therein due to the axial movement imparted by control rod 13.
  • Sleeve 14 is, in turn, axially movable towards and away from support member 7 and between:
  • the inner environment of the container 2 corresponds to the neck of the filled bottle.
  • Said neck for example in case the bottle contains a not carbonated pourable product, must be stiffened to improve the rigidity of the bottle.
  • the stiffening is for reducing or avoiding the deformation to which the bottle, after the palletization, will be subjected due to the pressure of other bottles placed above.
  • the pressurization can therefore be carried out for palletization purposes.
  • the pressurization is obtained by introducing an amount of an additional substance, which can be nitrogen in the liquid state. Said substance, thanks to the capping operation, passes from the liquid state to a pressurized gas state.
  • the consumption of the additional substance is not any more necessary, because the pressurization is not obtained by means of introducing said substance. Therefore, it is provided a more efficient capping device configured for capping and stiffening a container containing a pourable product.
  • chamber 17 is delimited laterally by sleeve 14, superiorly by capping head 8, more precisely by control rod 13, and inferiorly by support member 7.
  • the so obtained chamber 17 houses, when sleeve 14 is in the second position, neck portion 2a of the container 2 to be capped.
  • sleeve 14 in the second position, could be configured to cooperate in contact with container 2, in particular with an upper portion of the body of container 2 in order to cause first axial opening 15 to close, thereby delimiting pressurization chamber 17.
  • chamber 17 is delimited inferiorly by container 2.
  • chamber 17 is closable by sleeve 14 being in the second position.
  • sleeve 14 carries, at a lower end portion thereof, a sealing lip 19 configured to cooperate in contact (when sleeve 14 is in the second position) with support member 7 - or with container 2 - so that chamber 17 is closed substantially in a fluid-tight manner.
  • capping device 6 comprises a cam roller 50 (visible in Figure 2 ) configured to cooperate with a cam surface (not shown) to cause the movement of sleeve 14 between the first and second position.
  • sleeve 14 could be moved by a dedicated motor.
  • capping portion 12 extends radially up to an internal wall 14a of sleeve 14 and is axially movable towards and away from support member 7, by being driven in use by control rod 13, in sliding contact with internal wall 14a to define a piston within sleeve 14.
  • capping portion 14 slidably engages sleeve 14, radially occupying the whole internal cavity defined by sleeve 14.
  • capping portion 12 defines, in its axial movement within sleeve 14 a piston within sleeve 14 itself, while sleeve 14 defines the cylinder housing such piston.
  • capping portion 12 is configured to pressurize chamber 17 by moving towards support member 7 for capping the container 2 which is supported, in use, by support member 7.
  • the device 1 is configured so that the capping portion 12 applies the cap 3 to the container 2 by means of an axial capping movement towards the support member 7.
  • the device 1 is configured so that the capping portion 12 pressurizes the chamber 17 by means of the same axial capping movement. In this way the capping portion 12 contributes actively both to the pressurization and the capping, to simplify the capping device 6 and the control of the pressurization and capping operations.
  • capping portion 12 is movable towards support member 7 when sleeve 14 is in said second position.
  • sleeve 14 in order to pressurize chamber 17, sleeve 14 is moved from the first position ( Figure 3A ) to the second position ( Figure 3B ) so that sealing lip 19 contacts support member 7 - or container 2 - thereby closing first axial opening 15. Then, capping portion 12, which carries a cap 3 to be applied, is moved, by driving control rod 13, towards support member 7 and, thus, towards container 2 ( Figure 3C ). By means of the movement of the capping portion 12 between Figure 3B and Figure 3C , the cap 3 is applied to the container 2 and the chamber 17 is pressurized, to pressurize the inner environment of the container 2.
  • capping device 6 comprises a linear motor 20 ( Figure 2 ), defining the above-mentioned actuator, configured to drive capping portion 12 in its movement towards and away from support member 7.
  • Linear motor 20 allows to better adjust the capping movement based on the specific needs, which in turn depend for example on the features of the container 2 and/or on the features of the cap 3, and/or on the level of pressurization to be obtained within the chamber 17. In this way the flexibility of the filling device 6 is improved.
  • control rod 13 is coupled to linear motor 20 so that linear motor 20 drives, in use, control rod 13, thereby driving the capping movement of capping portion 12.
  • linear motor 20 is particularly advantageous as it allows to control finely and precisely the axial movement of the piston/capping portion 12 within sleeve 14, which results in a more fine control of the pressurization of chamber 17.
  • linear motor 20 is particularly advantageous when caps 3 of the snap-on type are used.
  • capping device 6 further comprises:
  • the filling device 6 is configured so that the one way valve 23 allows the flow of pressurized gas from the chamber 17 to the pressurized environment 22 only when the pressure within the chamber 17 reaches a threshold physically correlated to the predetermined pressure.
  • this threshold could be ideally considered to correspond substantially to the same predetermined pressure. Therefore the maximum pressure and therefore the final pressurization within the chamber 17 can be controlled also by regulating the pressure within the pressurized environment 22. In this way the device 6 can be easier adapted to the specific needs, so that it is easier for the user to exploit the increased flexibility of the capping device 6.
  • capping machine 1 comprises a reservoir 22 defining the above pressurized environment and pneumatically connectable to chamber 17 by means of one-way valve 23 and duct 21.
  • the reservoir 22 can be considered as a counter pressure source.
  • the above configuration is particularly useful in case a format change is due, i.e. in case capping machine 1 is configured to cap containers 2 of different format: in such a case, the space between the free surface of the pourable product and the outlet opening of container 2 is variable and thus variable is the pressurization value at which the different containers 2 have to be pressurized.
  • each arm 11 of gripper 10 of support member 7 carries an elastomeric pad 24, in particular made of silicon, at a free end thereof.
  • Such pad 24 is configured to cooperate in contact, when arms 11 are in the closed position, with the elastomeric pad 24 carried by the other arm 11 of the same pair.
  • sleeve 14, and in particular sealing lip 19 is configured to contact an upper surface 7a of support member 7, wherein such upper surface 7a radially protrudes from peripheral ring 4a of carousel 4 and is defined, for a part thereof, by one arm 11 and, for the remaining part, by the other arm 11.
  • elastomeric pads 24 ensures that, when sleeve 14 is in the second position, chamber 17 is inferiorly closed substantially in a fluid-tight manner, thereby limiting fluid leaks out of chamber 17.
  • each arm 11 is provided with further elastomeric pads 25 at portions other from its free end, so as to more efficiently seal chamber 17 when sleeve 14 is in the second position.
  • sleeve 14, and in particular sealing lip 19 is configured to cooperate in contact, when in the second position, with support member 7 and peripheral ring 4a.
  • peripheral ring 4a defines a first support wall 26 ( Figure 2 ), in particular an upper support wall, and the end portion of each arm 11 has a second support wall, defined by a part of upper surface 7a, which is flush to first support wall 26 for defining, together with first support wall 26, a support surface for sleeve 14 in the second position.
  • chamber 17 is delimited inferiorly by both support member 7 and peripheral ring 4a of carousel 4.
  • a method for applying caps 3 onto containers 2 containing a pourable product can be implemented by capping machine 1, the method comprising, for each container to be capped, the steps of:
  • Figure 4 shows a capping device 6' according to an alternative embodiment, which is not according to the present invention.
  • capping device 6' is functionally and structurally similar to capping device 6, the same reference numbers will be used to indicate similar parts.
  • capping device 6' differs from capping device 6 in that capping portion 12 does not extend radially up to internal wall 14a and by comprising, instead of duct 21 and one-way valve 23:
  • capping machine 1 comprises a reservoir 22' defining the pressure source and pneumatically connectable to chamber 17 by means of valve 23'.
  • valve 23' is opened to allow pressurized gas to flow from reservoir 22' into chamber 17, thereby pressurizing this latter and container 2.
  • capping portion 12 is moved, by means of control rod 13, towards container 2 to apply the respective cap 3 to this latter.
  • capping portion 12 does not define a piston within sleeve 14.
  • capping device 6 According to the present invention will be clear from the foregoing description.
  • capping portion 12 is used as a piston within sleeve 14 to pressurize containers 2, since the capping movement of capping head 8 is used as pressurizing means.
  • capping device 6 as described herein without, however, departing from the scope of protection as defined in the accompanying claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Jars (AREA)

Claims (7)

  1. Verschließvorrichtung (6) zum Verschließen von mit einem vergießbaren Produkt gefüllten Behältern (2), wobei die Verschließvorrichtung (6, 6') Folgendes umfasst:
    - ein Trägerelement (7) zum Tragen mindestens eines mit mindestens einem Verschluss (3) zu verschließenden Behälters (2);
    - eine rohrförmige Hülse (14), die eine Längsachse (A), eine dem Stützelement (7) zugewandte erste axiale Öffnung (15) und eine der ersten axialen Öffnung (15) entgegengesetzte zweite axiale Öffnung (16) aufweist; und
    - einen Verschließkopf (8), der sich entlang der Längsachse (A) erstreckt und verschiebbar in die zweite axiale Öffnung (16) der Hülse (14) eingreift, wodurch die zweite axiale Öffnung (16) verschlossen wird;
    wobei der Verschließkopf (8) einen Verschließabschnitt (12) mit einer Aufnahme (12a) zum Aufnehmen und Halten des Verschlusses (3) umfasst, wobei der Verschließabschnitt (12) innerhalb der Hülse (14) angeordnet und zum Aufbringen des Verschlusses (3) auf den getragenen Behälter (2) durch die Hülse (14) axial beweglich ist;
    wobei die Hülse (14) auf das Trägerelement (7) zu und davon weg und zwischen folgenden Positionen beweglich ist:
    - einer ersten Position, in der die erste axiale Öffnung (15) offen und vom Trägerelement (7) axial beabstandet ist; und
    - einer zweiten Position, in der die Hülse (14) mit dem Trägerelement (7) oder mit dem Behälter (2) zum Verschließen der ersten axialen Öffnung (15) und dadurch Begrenzen einer Druckkammer (17) in Kontakt zusammenwirkt, wobei die Kammer (17) dazu ausgelegt ist, zum Druckbeaufschlagen einer inneren Umgebung des getragenen Behälters (2) druckbeaufschlagt zu sein;
    wobei der Verschließkopf (8) einen Verstellstab (13) umfasst, der sich entlang der Längsachse (A) erstreckt, axial auf das Trägerelement (7) zu und davon weg beweglich ist, auf einem Ende den Verschließabschnitt (12) trägt und verschiebend, im Wesentlichen fluiddicht, in die zweite axiale Öffnung (16) eingreift, um zusammen mit der Hülse (14) die Druckkammer (17) zu begrenzen, die an der ersten axialen Öffnung (15) offen und durch die Hülse (14) in der zweiten Position im Wesentlichen fluiddicht verschließbar ist;
    dadurch gekennzeichnet, dass sich der Verschließabschnitt (12) radial bis zu einer inneren Seitenwand (14a) der Hülse (14) erstreckt und im Schiebekontakt mit der Innenwand (14a) auf das Trägerelement (7) zu und davon weg beweglich ist, um einen Kolben innerhalb der Hülse (14) zu definieren; und wobei die Vorrichtung (6) derart ausgelegt ist, dass der Verschließabschnitt (12) den Verschluss (3) mittels einer axialen Verschließbewegung auf das Trägerelement (7) zu auf den Behälter (2) aufbringt;
    und wobei die Vorrichtung (6) derart ausgelegt ist, dass der Verschließabschnitt (12) die Kammer (17) mittels derselben axialen Verschließbewegung druckbeaufschlagt.
  2. Verschließvorrichtung (6) nach Anspruch 1, wobei der Verschließabschnitt (12) auf das Trägerelement (7) zu beweglich ist, wenn sich die Hülse (14) in der zweiten Position befindet.
  3. Verschließvorrichtung (6) nach Anspruch 1 oder 2 und Folgendes umfassend:
    - einen Kanal (21), der dazu ausgelegt ist, die Hülse (14) mit einer Druckumgebung (22) pneumatisch zu verbinden, die einen festgelegten Druck aufweist, der größer ist als der Umgebungsdruck; und
    - ein Rückschlagventil (23), das entlang des Kanals (21) angeordnet und aktivierbar ist, um das Durchströmen von Druckgas von der Druckkammer (17) zur Druckumgebung (22) zuzulassen;
    wobei die Verschließvorrichtung (6) derart ausgelegt ist, dass das Rückschlagventil (23) die Strömung von Druckgas von der Kammer (17) zur Druckumgebung (22) nur zulässt, wenn der Druck in der Kammer (17) einen Schwellenwert erreicht, der dem festgelegten Druck (22) physikalisch entspricht.
  4. Verschließvorrichtung (6) nach einem der vorstehenden Ansprüche und umfassend einen Linearmotor (20), der dazu ausgelegt ist, die Verschließbewegung des Verschließabschnitts (12) anzutreiben.
  5. Verschließvorrichtung (6) nach einem der vorstehenden Ansprüche, wobei das Trägerelement (7) einen Greifer (10) zum Greifen eines Halsabschnitts (2a) des Behälters (2) umfasst;
    wobei der Greifer (10) ein Paar Arme (11) umfasst, die zwischen einer geöffneten Position und einer geschlossenen Position zum Umgeben und Greifen des Halsabschnitts (2a) beweglich sind.
  6. Verschließvorrichtung (6) nach Anspruch 5, wobei jeder Arm (11) mindestens ein Elastomerkissen (24, 25) an einem freien Ende trägt, das dazu ausgelegt ist, in der geschlossen Position mit dem vom anderen Arm (11) desselben Paars getragenen mindestens einen Elastomerkissen (24, 25) in Kontakt zusammenzuwirken.
  7. Verschließmaschine (1) zum Verschließen von mit einem vergießbaren Produkt gefüllten Behältern (2), wobei die Maschine (1) Folgendes umfasst:
    - einen Förderer (4), der zum Tragen mehrerer aufeinanderfolgender zu verschließender Behälter (2) entlang einer Verschließstrecke ausgelegt ist; und
    - mehrere Verschließvorrichtungen (6), wobei jede Verschließvorrichtung (6) einem der vorstehenden Ansprüche entspricht und vom Förderer (4) getragen wird.
EP21167767.9A 2021-04-12 2021-04-12 Verschlussvorrichtung und verschlussverfahren Active EP4074649B1 (de)

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KR102619386B1 (ko) * 2023-06-09 2024-01-02 류병석 강성 병과 연성 병 모두의 캡핑처리가 가능한 캡핑기
CN117185223B (zh) * 2023-11-07 2024-02-02 江苏尚纯自动化技术有限公司 一种用于物料包装的保压旋盖头及保压旋盖机构

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DE102008033818A1 (de) * 2008-07-19 2010-01-21 Kkb O2 Fluid Production Gmbh Verfahren und Vorrichtung zum Verschließen von Behältern
BR112012011655A2 (pt) * 2009-11-17 2016-07-05 Amcor Rigid Plastics Usa Inc aparelho de fechamento pressurizado
DE102012013320A1 (de) * 2012-07-06 2014-01-09 Khs Corpoplast Gmbh Vorrichtung und Verfahren zum Verschließen eines gefüllten Behälters
DE102014104873A1 (de) * 2014-04-04 2015-10-08 Krones Ag Verfahren und Vorrichtung zum Befüllen eines Behälters mit einem Füllprodukt

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