WO2001040072A1 - Dispositif pour etancheifier le bord d'about d'un col de recipient - Google Patents

Dispositif pour etancheifier le bord d'about d'un col de recipient Download PDF

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Publication number
WO2001040072A1
WO2001040072A1 PCT/EP2000/011623 EP0011623W WO0140072A1 WO 2001040072 A1 WO2001040072 A1 WO 2001040072A1 EP 0011623 W EP0011623 W EP 0011623W WO 0140072 A1 WO0140072 A1 WO 0140072A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing lip
sealing
cover ring
ring
container
Prior art date
Application number
PCT/EP2000/011623
Other languages
German (de)
English (en)
Inventor
Udo Jandewerth
Hans-Peter Kabisch
Original Assignee
Tetra Laval Holdings & Finance S.A.
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
Application filed by Tetra Laval Holdings & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Priority to AU25081/01A priority Critical patent/AU2508101A/en
Publication of WO2001040072A1 publication Critical patent/WO2001040072A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/04—Coating on selected surface areas, e.g. using masks
    • C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/02—Collars or rings

Definitions

  • the invention relates to a device for sealing the front edge of a pouring neck made of plastic of a container during a treatment process of the inner surface of the container.
  • Containers with a pouring neck made of plastic are known.
  • the neck has an external thread on which a cap can be screwed.
  • containers of this type packed with sterile goods, in which, in order to maintain sterility inside the container, a plastic-coated aluminum foil is welded onto the front edge of the pouring shark and seals the container opening. The plastic cap is then screwed over this, which results in adequate mechanical protection for this film.
  • a process gas for example a mixture of an organosilicon compound, an oxidizing agent and a carrier gas such as argon, is introduced into the completely plastic container, for example a PET bottle. Electromagnetic energy is radiated in and ignites the plasma inside the container. In this treatment process, a glass-like silicon oxide is applied to those parts of the interior of the container which are exposed to the burning plasma.
  • the containers After filling the coated plastic containers, for example with liquid food, the containers must be sealed. This is done in the usual way by sealing an aluminum foil coated with plastic onto the front edge of the pouring neck. However, if this front edge is coated with the glass-like silicon oxide layer, the conventional heat sealing of the aluminum foils is not possible because the melting point of the glass is much higher than that of the plastic.
  • the surface of the front edge on the pouring Keep the neck free of treatment and preferably coating, so that it is possible to seal the plastic-coated aluminum foil, especially when packaging food in a sterile manner.
  • the sealing effect of a screw cap, as in the case of a mineral water bottle is not sufficient.
  • the invention is therefore based on the object of creating a device of the type mentioned at the outset, with the aid of which the front edge of the pouring neck remains on its surface with no simple treatment or interference, even if one of the inner surfaces of the container is being treated during treatment There is a pressure difference between the inside and outside of the container.
  • a cover ring made of elastic material with a conical or planar sealing lip is held by a ring receptacle arranged coaxially to the latter such that the end edge can be pressed against the sealing lip while deforming it.
  • the sealing device is given a ring shape because treatment and in particular coating materials have to be transported into the interior of the container. The sealing device must therefore have an opening through which these materials are transported. It is advisable to use the annular end edge of the pouring neck for sealing simply by pressing the end edge against an appropriately designed sealing lip. It is advantageous if the sealing lip has the shape of a truncated cone or a cone, the cover ring with the sealing lip should be made of elastic material.
  • the sealing device it is advisable for the arrangement of the sealing device according to the invention to arrange the container with its pouring neck downward, facing the ring receptacle, in such a way that the leading edge can be pressed against the sealing lip located above the ring seat.
  • the elastic material favors the deformation of the sealing lip and this in turn flawless sealing function between the space inside the pouring neck and thus also the container on the one hand and the environment outside the container and outside the ring receptacle on the other.
  • the containers considered here include packaging made of coated paper, cardboard or plastic. These can be plastic bottles in which the bottle neck is made in one piece with the main body from plastic. However, such containers are also conceivable, which partly consist of paper, in which partly the main body comprises paper or a similar material, and which nevertheless have a pouring neck made of plastic.
  • the elastic material of the cover ring is rubber, rubber, preferably neoprene rubber, silicone rubber or natural rubber.
  • Rubbers are highly polymeric, predominantly elastic substances, which include the natural rubbers, silicone rubbers mentioned, but also polyurethane rubbers and the like. Rubber is generally understood to mean the unvulcanized raw product, while rubber means the fully vulcanized product. It is known that natural rubber is obtained from the white, milky juice (latex) that flows out of the trunks of the milkweed after scoring. A cheap neoprene rubber is known under the trade name Viton. These are heat and chemical resistant vulcanizable fluoroelastomers based on vinylidene fluoride-hexafluoropropylene copolymers that can be used as seals.
  • the sealing device according to the invention is preferably characterized in that the cover ring has a lower support part which is delimited by an approximately cylindrical jacket-shaped radially inner and radially outer surface and the sealing lip fastened to the latter. It is expedient to note the diameter of the holes, for example the free edge of the sealing lip or the inner hole in the support part.
  • these mostly circular-disk-shaped holes have to be as large as possible in order to lead the process gas through the inner holes or to remove the used process gas again after the coating.
  • the lower support part serves to support and hold the cover ring, while the outer surface of the sealing lip ultimately forms the functional sealing surface which, together with the front edge of the pouring neck, ensures the function of the sealing device.
  • the support part is provided by a radially inner and a radially outer surface limited, which are approximately cylindrical in a special and preferred embodiment. In such an embodiment, the support part can be arranged and fastened to a ring receptacle that is easy to manufacture.
  • the axially higher part of the frustoconical sealing lip faces the central axis of the cover ring.
  • the axially higher part of the sealing lip is the part facing away from the lower support part, in which the free edge of the sealing lip lies.
  • the above-mentioned hole, a through-hole for process gas, will also be located in this. This through hole should be as large as possible to favor the treatment processes.
  • the advantage of this embodiment with the “inward” sealing lip has the advantage over the outwardly widening sealing lip that before the bending of the sealing lip the first time the front edge is touched, not the outer but the inner edge of the front edge first comes into contact with the sealing lip
  • the predominant horizontal part of the flat front edge is therefore also before the sealing lip is deformed outside this contact line between the front edge and the sealing line and thus outside the sealing line, which becomes a sealing surface after the bending and shaping the interior of the pouring neck in connection, so that a coating of the front edge is excluded in this embodiment with even greater certainty and under almost all circumstances.
  • the diameter of the passage hole at the free end of the sealing lip is less than or equal to the inside diameter of the support part, because then the gas supply and gas discharge mechanics are optimally radio-active when gases are passed through the cover ring. tioniert.
  • the difference in diameter is between 1 and 3 mm.
  • the design requires that the diameter of the passage hole at the free end of the sealing lip is not only larger than the inner diameter of the support part, but even larger or approximately equal to the outer diameter of the cover ring.
  • the inside diameter of the support part specifies the minimum passage cross section for the gases to be transported.
  • the outer diameter of the cover ring is x mm larger than the outer diameter of the pouring neck of the container, with 2 ⁇ x ⁇ 10 and preferably 3 ⁇ x ⁇ 7. If the person skilled in the art observes this teaching, he will determine that this Sealing the end edge on the container neck is possible with particularly simple means and not only tolerances of one type of container neck, but even different types of pouring necks with different diameters can be assigned to the same cover ring. In other words, a sufficient length (as seen in cross section) of the sealing lip is then available in the radial direction to the respective end edge, so that larger and smaller necks (within a certain bandwidth) can be pressed against one and the same cover ring. This simplifies the sealing device considerably, because one and the same ring holder with cover ring (in a certain bandwidth) can be associated with different types of containers.
  • an annular groove is arranged between the support part and the sealing lip of the cover ring, the hardness can be increased for selected materials for the cover ring, because then there is a free space between the underside of the sealing lip and the support part, into which the sealing lip can move more easily and can deform more easily.
  • the device according to the invention is characterized in that the surface of the sealing lip forming the functional sealing surface is so smooth and soft that injuries to the end edge of the pouring neck are excluded.
  • the sealing function according to the invention would not be impaired in the case of insufficiently smooth and soft configurations of the surface in question, if there are grooves, notches or grooves on the flat end edge of the neck of the container, its sterile closure is achieved by sealing the plastic-coated aluminum foil not always properly guaranteed with the consequence of leaks and non-sterility. It is also advantageous if a bellows is attached between the support part of the cover ring and the sealing lip. It has been found that in this embodiment the functional sealing surface is separated from the support part of the cover ring during operation.
  • the bellows serves as a resilient part of this separation. It can preferably be a one-piece bellows, in which, with regard to the shape, two frustoconical surfaces are set against one another and connected to one another or these truncated cones are integrally formed with one another in such a way that the sealing surface is located on the respective narrower end on one side , while opposite the support part is attached or molded in one piece.
  • the sealing lip and thus the functional sealing surface on the outside was deformed at the top by reducing the height of the entire cover ring.
  • the functional sealing surface no longer needs to be deformed and does not need to spring.
  • the sealing lip in the last-mentioned embodiment can be provided in a plane, if necessary shaped, the plane through this sealing lip being at a distance and parallel to that, in general horizontal plane, which is to be thought of as being laid by the supporting part. Regardless of the movement of the now flat sealing lip, the flat supporting part can remain in its position with respect to the ring receptacle, even if the plane were tilted in the sealing lip.
  • any fold formation when the front edge of the container neck is pressed against the cover ring and against the ring receptacle is absorbed by the bellows alone.
  • small folds would have to be absorbed by the deformed sealing tip in the case of very strong pressings and deformations.
  • the sealing function can be compensated for by the corresponding softness of the sealing ring, but less constraints need to be taken into account in the version with the bellows in order to solve the task perfectly.
  • a radially larger width of the functional sealing surface can also be achieved because, for the reasons mentioned, greater demands can be placed on it. This in turn allows you to control a larger diameter range for different end edges with one and the same cover ring. This has the advantage that fewer changeover processes will occur on average, since a larger number of differently shaped pouring necks can be processed with the same cover ring.
  • the sealing device according to the invention reliably and completely prevents the coating of the end edge, which later forms a sealing and sealing surface and surrounds the edge of the pouring neck. Without complex mechanics, the front edge can be covered well with technically simple means.
  • the sealing effect and the operation of the device according to the invention are ensured both at normal pressure and under vacuum, since no cavities or open structures are required which would prevent the formation of a vacuum. Even the process of plasma deposition and coating of hollow bodies on the inside is possible with the new device, because it can be constructed to be chemically robust with light means. Due to the relatively soft cover ring, no metal parts come into contact with the front edge of the pouring neck, which is thus protected from injuries and later leaks.
  • Silicone rubber in particular has proven to be cheap because it is chemically stable and nevertheless provides a soft and elastic cover ring.
  • the invention is further embodied in that the cover ring can be supported radially by a collar and axially by an annular shoulder of the ring receptacle.
  • the supporting part lies on the outside around the collar of the ring seat and is thereby supported radially securely, while this is ensured axially by the ring shoulder of the ring seat.
  • the cover ring lies within the collar of the ring receptacle.
  • the deformation of the cover ring is particularly favored when the end edge is pressed against the cover ring.
  • This gripping of the collar of the ring receptacle also represents the optimal support for the embodiment with the bellows.
  • FIG. 1 shows in cross section a container directed downwards against a sealing device with the pouring neck, with the ring receptacle shown below, 2 shows a perspective side view of the structure of FIG. 1 at an angle from above,
  • FIG. 3 shows a partial representation broken away in cross section according to detail III in FIG. 1,
  • FIG. 4 shows a cross-sectional view similar to FIG. 1, but with a different embodiment of the cover ring
  • FIG. 5 shows a broken cross-sectional view of the detail designated V in FIG. 4,
  • Figure 6 is a similar representation as Figure 5, but with a cover ring without groove (other
  • FIG. 7 shows the embodiment of the cover ring of FIGS. 4 and 5 in cross section without a ring seat
  • FIG. 8 the cover ring of FIG. 7 in a perspective view obliquely from above
  • Figure 10 is a perspective view of the cover ring of Figure 9 obliquely from below.
  • the container 1 shown upside down in the figures has a pouring neck 2 opposite its bottom and shown here arranged below with an external thread, which is shown in a known manner and is not described in detail here.
  • the pouring neck 2 is open at the bottom and is closed at its outer, open, lower end by an end edge 3 which lies in a plane which is assumed to be horizontal in the illustration of the drawings.
  • the vertical longitudinal axis of the container 1, which coincides with the central axis 4 of a cover ring 5a, 5b, 5c, 5d, is to be considered perpendicular to this.
  • the cover ring 5a .... 5d is held by a ring receptacle 6, which is attached to a ring plate shown here only by way of fastening screws.
  • This ring plate can also represent a main plate of a machine, in which, depending on the number of treatment stations, a corresponding number of holes are provided, which are of the same size and are arranged in alignment with the cylindrical passage in the ring seat 6.
  • the inside diameter of the passage in the ring receptacle 6 is approximately as large and, on closer inspection here, for example somewhat smaller than the inside diameter of the pouring neck 2 of the respective container and specifies the passage cross section for fluid which is introduced into the interior of the container 1 from bottom to top and vice versa can be led out downwards, for example in the case of plasma coating the inner surface 7 of the container 1 being coated with a layer.
  • FIG. 1 to 3 show a first embodiment of a cover ring 5a made of silicone rubber.
  • This cover ring 5a has a conical or frusto-conical sealing lip 8a in the free, upper area facing the pouring neck 2 and a support part 9a, which is located in the opposite lower area facing the ring seat 6.
  • a ring arranged groove 10a Between the support part 9a and the sealing lip 8a of the cover ring 5a is a ring arranged groove 10a, which allows the sealing lip 8a to be deformed by the design of its undercut.
  • This movement of the container 1 down to the ring receptacle 6 and back upwards applies to all embodiments.
  • the cover ring 5 is supported radially by a collar 11 and axially by an annular shoulder 12 of the ring receptacle 6.
  • FIGS. 4, 5, 7 and 8 A second embodiment of a cover ring 5b is shown in FIGS. 4, 5, 7 and 8. This again has the support part 9b in its lower area and the sealing lip 8b in its upper area, which is also frustoconical here, but narrows upwards towards the central axis 4 of the cover ring 5b.
  • the support part 9b has an approximately cylindrical outer radial inner surface 13 and a radially outer surface 14. These limit the respective support part 9a to 9d.
  • the upper, outer surface 15 of the respective sealing lip lies on the end of the cover ring 5a to 5d diametrically opposite (in the direction of the central axis 4) and represents the functional sealing surface 15.
  • This surface of the sealing lip which forms the sealing surface 15 8a to 8d is smooth, and the material of the cover ring 5a to 5d is so soft that injuries to the front edge 3 of the pouring neck 2 are excluded in all embodiments of containers 1.
  • the embodiment of Figures 4, 5, 7 and 8 of the cover ring 5b differs from that of the cover ring 5c of Figure 6 only in that the cover ring 5b has an annular groove 10b between the sealing lip 8b and the support member 9b, while this annular groove in the embodiment of the cover ring 5c of FIG. 6 is eliminated.
  • the cover ring 5d is formed here from two frustoconical parts, which are set against one another in the manner particularly shown in FIG. 9 in such a way that their narrow ends on one, lower side with the lower support part 9d or on the upper, other side with the sealing lip 8d lying essentially horizontally in one plane.
  • the functional sealing surface 15 of the sealing lip 8d lies here in one plane, and due to the softness and flexible coupling of the support part 9d via the bellows 16, the sealing lip 8d can be moved and also set at an angle with respect to the support part 9d, which is to be considered stationary, without the slightest wrinkling would be feared on the sealing surface 15.
  • the diameter D 3 of the passage hole 17 at the free end of the sealing lip 8b, 8c or 8d is preferably less than or equal to the inner diameter D 4 of the support part 9b to 9d.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention concerne un dispositif permettant d'étanchéifier le bord d'about sur le col à bec verseur (2) d'un récipient (1) pendant un processus de traitement de la surface intérieure (7) du récipient (1). Afin que le bord d'about du col à bec verseur (2) demeure sur sa surface sans traitement ou intervention, à l'aide de moyens techniquement simples, même en cas de pression différentielle entre l'intérieur du récipient et l'extérieur, pendant le traitement de la surface intérieure (7) du récipient (1), il est prévu une bague de recouvrement (5a) en matière élastique munie d'une lèvre d'étanchéité conique (ou éventuellement plane), maintenue par une cavité annulaire (6) pratiquée coaxialement à ladite bague, de manière que le bord d'about puisse être comprimé contre la lèvre d'étanchéité, tout en la déformant.
PCT/EP2000/011623 1999-12-01 2000-11-22 Dispositif pour etancheifier le bord d'about d'un col de recipient WO2001040072A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25081/01A AU2508101A (en) 1999-12-01 2000-11-22 Device for sealing the front edge of the neck of a container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19957744.7 1999-12-01
DE1999157744 DE19957744A1 (de) 1999-12-01 1999-12-01 Vorrichtung zum Abdichten des Stirnrandes eines Behälterhalses

Publications (1)

Publication Number Publication Date
WO2001040072A1 true WO2001040072A1 (fr) 2001-06-07

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ID=7930948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/011623 WO2001040072A1 (fr) 1999-12-01 2000-11-22 Dispositif pour etancheifier le bord d'about d'un col de recipient

Country Status (3)

Country Link
AU (1) AU2508101A (fr)
DE (1) DE19957744A1 (fr)
WO (1) WO2001040072A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005526911A (ja) * 2002-05-24 2005-09-08 エスアイジー テクノロジー リミテッド 工作物のプラズマ処理方法および装置
WO2009121324A1 (fr) * 2008-03-31 2009-10-08 Khs Corpoplast Gmbh & Co. Kg Dispositif de traitement de pièces au plasma
ITBS20110087A1 (it) * 2011-06-15 2012-12-16 Flaem Nuova Spa Contenitori per la marinatura e/o conservazione di prodotti sottovuoto

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10114401B4 (de) 2001-03-23 2005-03-17 Tetra Laval Holdings & Finance S.A. Verfahren zum Blasformen eines Behälters aus Kunststoff und zum Beschichten des Behälterinneren
DE10221461B4 (de) * 2002-05-15 2004-05-06 Schott Glas Vorrichtung und Verwendung einer Vorrichtung zum Aufnehmen und Vakuumabdichten eines Behältnisses mit einer Öffnung
DE102022119836A1 (de) 2022-08-08 2024-02-08 Khs Gmbh Positionier- und Dichtvorrichtung für das Halten und Abdichten eines Werkstückes in einer Plasmakammer einer Plasmabeschichtungsvorrichtung

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JPH0930555A (ja) * 1995-07-14 1997-02-04 Matsushita Electric Works Ltd 臭気発生部のシール装置
EP0787828A2 (fr) * 1996-01-30 1997-08-06 Becton, Dickinson and Company Appareillage et méthode de traitement par plasma
WO1998015669A1 (fr) * 1996-10-08 1998-04-16 Felts John T Procede et appareil de depot par plasma d'une couche mince sur la surface interieure d'une enceinte
US5849366A (en) * 1994-02-16 1998-12-15 The Coca-Cola Company Hollow containers with inert or impermeable inner surface through plasma-assisted surface reaction or on-surface polymerization

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US5849366A (en) * 1994-02-16 1998-12-15 The Coca-Cola Company Hollow containers with inert or impermeable inner surface through plasma-assisted surface reaction or on-surface polymerization
JPH0930555A (ja) * 1995-07-14 1997-02-04 Matsushita Electric Works Ltd 臭気発生部のシール装置
EP0787828A2 (fr) * 1996-01-30 1997-08-06 Becton, Dickinson and Company Appareillage et méthode de traitement par plasma
WO1998015669A1 (fr) * 1996-10-08 1998-04-16 Felts John T Procede et appareil de depot par plasma d'une couche mince sur la surface interieure d'une enceinte

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005526911A (ja) * 2002-05-24 2005-09-08 エスアイジー テクノロジー リミテッド 工作物のプラズマ処理方法および装置
JP4654027B2 (ja) * 2002-05-24 2011-03-16 カーハーエス コーポプラスト ゲーエムベーハー ウント コンパニー カーゲー 工作物のプラズマ処理方法および装置
WO2009121324A1 (fr) * 2008-03-31 2009-10-08 Khs Corpoplast Gmbh & Co. Kg Dispositif de traitement de pièces au plasma
ITBS20110087A1 (it) * 2011-06-15 2012-12-16 Flaem Nuova Spa Contenitori per la marinatura e/o conservazione di prodotti sottovuoto

Also Published As

Publication number Publication date
AU2508101A (en) 2001-06-12
DE19957744A1 (de) 2001-06-07

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