EP1945522B1 - Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture - Google Patents

Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture Download PDF

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Publication number
EP1945522B1
EP1945522B1 EP06806178A EP06806178A EP1945522B1 EP 1945522 B1 EP1945522 B1 EP 1945522B1 EP 06806178 A EP06806178 A EP 06806178A EP 06806178 A EP06806178 A EP 06806178A EP 1945522 B1 EP1945522 B1 EP 1945522B1
Authority
EP
European Patent Office
Prior art keywords
lid
sealing
sealing flange
ring
membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06806178A
Other languages
German (de)
English (en)
Other versions
EP1945522A1 (fr
Inventor
Sven Bauer
Christoph Dietrich
Reinhart Geisler
Andreas Ziegler
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
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 Alcan Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Priority to PL06806178T priority Critical patent/PL1945522T3/pl
Priority to SI200630493T priority patent/SI1945522T1/sl
Priority to EP06806178A priority patent/EP1945522B1/fr
Publication of EP1945522A1 publication Critical patent/EP1945522A1/fr
Application granted granted Critical
Publication of EP1945522B1 publication Critical patent/EP1945522B1/fr
Priority to CY20091101287T priority patent/CY1110072T1/el
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps

Definitions

  • the invention relates to a method for producing a can lid with a cover ring with an annular sealing flange and sealed on the sealing flange and peelable from this closure membrane, the sealing flange with an inner edge a perpendicular to a lid ring axis lying, defining a lid plane opening cross-sectional area as a discharge opening and merges with an outer edge in a substantially perpendicular to the lid plane annular wall whose free end is formed into an outer crimp for connecting the can lid with the opening edge of a can body, and wherein the sealing flange with the lid plane forms an acute angle and the sealing membrane over the removal opening is curved, wherein the curvature of the closure membrane through the removal opening between two substantially mirror-symmetrical lying to the opening cross-sectional area end positions is displaceable.
  • a flat sheet metal part is first formed into a cylindrical tube.
  • the axially extending edges of the tube are pressed together and welded together, which is done by means of a laser beam and leads to the formation of a butt weld seam.
  • the tube is then divided into equal length tube sections or cylindrical rings.
  • Each cylindrical ring is formed into a lid ring having a crimp rim for attachment to a can body and to an annular support surface for later attachment of the closure membrane.
  • the above-mentioned method for producing a cover ring starting from a cylindrical ring has the advantage of a significantly reduced scrap fraction compared to the classic cover ring manufacturing, in which initially formed a sheet metal disc and then punched out to form the cover ring removal opening.
  • a major disadvantage of conventional cover rings with peelable sealing membrane is that cans can be sterilized with such can lids only with controlled back pressure.
  • the field of application of conventional cover rings with peelable sealing membrane is thereby severely limited, in particular in the important market of cans for food.
  • Can lids are known with a cover ring, in which the sealing flange with the lid plane encloses an acute angle and the sealing membrane over the removal opening is arched. During the production of these can ends, the sealing membrane is sealed onto the sealing flange, which has previously been inclined in relation to the cover plane.
  • the invention has for its object to provide an alternative to the method of the type mentioned method, which can be realized inexpensively by simple means.
  • a closure membrane is sealed onto a cover ring with a sealing flange located in the cover plane, the cover ring with sealed closure membrane is adjusted such that it encloses an acute angle with the cover plane, and the closure membrane is deep-drawn through the removal opening becomes.
  • a tangent applied to the curved sealing membrane at the transition of the curvature into the sealing flange at the inner edge encloses an acute angle ⁇ in one of the end positions with the cover plane which is smaller than or equal to the angle ⁇ between sealing flange and cover plane.
  • the curvature of the closure membrane is in both end positions within a given by the height of the annular wall Kemtiefe.
  • the angle ⁇ between the sealing flange and the cover plane is preferably 10 ° to 60 °.
  • the angle ⁇ between the tangent to the curved sealing membrane at the transition of the curvature into the sealing flange at the inner edge and the cover plane is preferably 10 ° to 60 °.
  • the closure membrane is preferably a deformable by deep drawing, conveniently by peeling from the sealing flange detachable aluminum foil or aluminum / plastic composite film.
  • cover ring As a material for the cover ring are all known for can production metals such as aluminum, steel or tinplate. These metals can also be painted or reshaped with a plastic coating of, for example, polypropylene.
  • the can lid produced by the method according to the invention is particularly suitable as a closure for cans with sterilizable filling material.
  • FIG. 1 illustrated cover 10 'with a rotationally symmetrical to a ring axis Z lying lid ring 11' has a in a right angle to Ring axis z standing lid plane E arranged annular sealing flange 12.
  • the outer edge of the sealing flange 12 merges into an annular wall 18 which is substantially concentric with the ring axis z.
  • the free end of the annular wall 18 is formed into an outer flange 20.
  • the distance between the cover plane E and outer flange 20 is referred to as Kemtiefe t.
  • the inner edge of the sealing flange 12 is rolled into a rolled edge 22 and defines a removal opening 24 with a circular opening cross-sectional area F.
  • a closure membrane 14 closing the removal opening 24 is sealed.
  • the closure membrane 14 rests against the sealing flange 12 and is connected thereto via an adhesive or sealing layer.
  • the material used for the closure membrane 14 is, for example, an aluminum or sheet-steel foil optionally having a heat-sealable coating.
  • the seal between sealing membrane 14 and sealing flange 12 is adjusted so that the sealing membrane from the sealing flange by peeling (peeling) can be removed.
  • a tear-open tab 16 arranged on the edge of the closure membrane 14 serves to remove or peel the closure membrane 14 from the sealing flange 12, releasing the removal opening 24.
  • a lid ring 11 ' is first produced in a known manner and a closure membrane 14 is sealed onto the sealing flange 12 located in the lid plane E. Subsequently, according to Fig. 6 the lid ring 11 'clamped with sealed closure membrane 14 in a first tool 40. With a second tool 42, the sealing flange 12 is set to the desired angled position. With a third tool 44, z. B. with a spherical punch made of Teflon, the closure membrane 14 is formed by deep drawing in the ring axis z to a curvature with a camber s. Instead of a mechanical deep drawing with a stamp, the deformation can also be done pneumatically or hydraulically.
  • the curvature height ⁇ s of the closure membrane 14 is dimensioned so that the closure membrane 14 lies completely in its end positions A and B within the high can edge predetermined by the large core depth t.
  • the deep drawing step can be carried out in both directions, since the curved closure membrane 14 between the end position A and the lying in substantially mirror-symmetrical to the removal opening 24 end position B within the defined by the annular wall 18 and the resulting high dose edge interior space is displaceable.
  • the deep-drawing step takes place in the end position A.
  • the deep-drawing step can also take place before the sealing flange 12 is set up in the angled position.
  • the volume of the contents increases as a result of the increased temperature.
  • the internal pressure increases by an amount + ⁇ P relative to the vapor pressure at the filling temperature.
  • the closure membrane 14 is pushed from the initial lower end position A through the discharge opening 24 into the upper end position B and is in this position under an increased relative to atmospheric pressure internal pressure.
  • a possible plastic deformation of the closure membrane 14 can be counteracted, for example, with a thicker membrane material, with support foils of, for example, oriented polyamide (oPA), oriented polyethylene terephthalate (oPET), oriented polypropylene (oPP) or with a fiber-reinforced plastic film.
  • oPA oriented polyamide
  • OPET oriented polyethylene terephthalate
  • oPP oriented polypropylene
  • the volume of the contents decreases as a result of the falling temperature.
  • the internal pressure drops as a result of the now reduced vapor pressure of the filling liquid at the sterilizing temperature compared to the vapor pressure at the filling temperature by an amount - ⁇ P.
  • the closure membrane 14 is pulled from the upper end position B through the removal opening into the lower end position A and is in this position under an atmospheric pressure reduced to the internal pressure.
  • the angle ⁇ between sealing flange 12 and cover level E can be reduced and holds the closing membrane 14 under tension and thus virtually without wrinkles due to the resulting restoring forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Closing Of Containers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Casings For Electric Apparatus (AREA)

Claims (9)

  1. Procédé de fabrication d'un couvercle de boite (10) comprenant un anneau de couvercle (11) avec une collerette de scellage (12) de forme annulaire, et une membrane de fermeture (14) scellée sur la collerette de scellage (12) et pouvant être retirée de celle-ci par pelage,
    la collerette de scellage (12) délimitant d'une part, avec un bord intérieur (22), une surface de section d'ouverture (F) en guise d'ouverture de prélèvement (24), qui est perpendiculaire à un axe d'anneau de couvercle (Z) et détermine un plan de couvercle (E), et se raccordant d'autre part, avec un bord extérieur, à une paroi annulaire (18) placée sensiblement perpendiculairement au plan de couvercle (E) et dont l'extrémité libre est formée en un collet de sertissage extérieur (20) pour la liaison du couvercle de boite (10) au bord d'ouverture d'un corps de boite (20),
    la collerette de scellage (12) formant par ailleurs un angle aigu α avec le plan de couvercle (E), et la membrane de fermeture (14) étant bombée au-delà de l'ouverture de prélèvement (24),
    et la forme bombée de la membrane de fermeture (14) pouvant être transférée, à travers l'ouverture de prélèvement (24), entre deux positions extrêmes (A, B) sensiblement symétriques par rapport à la surface de section d'ouverture (F),
    caractérisé
    en ce que l'on procède au scellage de la membrane de fermeture (14) sur un anneau de couvercle (11') comprenant une collerette de scellage (12) située dans le plan de couvercle (E), en ce que l'on incline l'anneau de couvercle (11') avec la membrane de fermeture (14) qui y est scellée, de manière à ce qu'il forme un angle α aigu avec le plan de couvercle (E), et en ce que l'on emboutit la membrane de fermeture (14) à travers l'ouverture de prélèvement (24).
  2. Procédé selon la revendication 1, caractérisé en ce qu'une tangente (m) à la membrane de fermeture (14) bombée, appliquée au niveau du raccordement de la forme bombée à la collerette de scellage (12) au niveau du bord intérieur (22), forme, dans une des positions extrêmes (B), avec le plan de couvercle (E), un angle aigu β, qui est inférieur ou égal à l'angle α entre la collerette de scellage (12) et le plan de couvercle (E).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la forme bombée de la membrane de fermeture (14) se situe, dans les deux positions extrêmes (A, B), à l'intérieur d'une profondeur intérieure (t) prédéfinie par la hauteur de la paroi annulaire (18).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'angle α entre la collerette de scellage (12) et le plan de couvercle (E), a une valeur de 10° à 60°.
  5. Procédé selon la revendication 4, caractérisé en ce que l'angle β entre la tangente à la membrane de fermeture (14) bombée, appliquée au niveau du raccordement de la forme bombée à la collerette de scellage (12) au niveau du bord intérieur (22), et le plan de couvercle (E), a une valeur de 10° à 60°.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la membrane de fermeture (14) est une feuille d'aluminium ou une feuille composite aluminium/matière plastique déformée par emboutissage.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'anneau de couvercle (11) est en aluminium, en acier ou en fer-blanc.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la membrane de fermeture (14) peut être retirée ou détachée de la collerette de scellage (12) par pelage, au moyen d'une languette à tirer (16).
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que le couvercle de boite (10) est serti sur un corps de boite (30) en tant que fermeture pour boites contenant un produit de remplissage (32) pouvant être stérilisé.
EP06806178A 2005-10-20 2006-10-11 Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture Active EP1945522B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL06806178T PL1945522T3 (pl) 2005-10-20 2006-10-11 Sposób wytwarzania pokrywy puszki z pierścieniem pokrywy i przeponą zamykającą
SI200630493T SI1945522T1 (sl) 2005-10-20 2006-10-11 Postopek za izdelavo pokrova doze z obročem pokrova in zaporno membrano
EP06806178A EP1945522B1 (fr) 2005-10-20 2006-10-11 Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture
CY20091101287T CY1110072T1 (el) 2005-10-20 2009-12-09 Διεργασια για την παραγωγη καλυμματος κυτιου με δακτυλιο και μεμβρανη σφραγισης

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05405593A EP1777165A1 (fr) 2005-10-20 2005-10-20 Couvercle pour une boîte comportant une collerette et une membrane de fermeture
PCT/EP2006/009808 WO2007045385A1 (fr) 2005-10-20 2006-10-11 Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture
EP06806178A EP1945522B1 (fr) 2005-10-20 2006-10-11 Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture

Publications (2)

Publication Number Publication Date
EP1945522A1 EP1945522A1 (fr) 2008-07-23
EP1945522B1 true EP1945522B1 (fr) 2009-09-16

Family

ID=35589390

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05405593A Withdrawn EP1777165A1 (fr) 2005-10-20 2005-10-20 Couvercle pour une boîte comportant une collerette et une membrane de fermeture
EP06806178A Active EP1945522B1 (fr) 2005-10-20 2006-10-11 Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05405593A Withdrawn EP1777165A1 (fr) 2005-10-20 2005-10-20 Couvercle pour une boîte comportant une collerette et une membrane de fermeture

Country Status (10)

Country Link
EP (2) EP1777165A1 (fr)
AT (1) ATE442996T1 (fr)
CY (1) CY1110072T1 (fr)
DE (1) DE502006004890D1 (fr)
DK (1) DK1945522T3 (fr)
ES (1) ES2333167T3 (fr)
PL (1) PL1945522T3 (fr)
PT (1) PT1945522E (fr)
SI (1) SI1945522T1 (fr)
WO (1) WO2007045385A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9617056B2 (en) 2006-02-03 2017-04-11 Ardagh Mp Group Netherlands B.V. Expandable container having lid for providing headspace control in a food can

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2052984T3 (pl) 2007-10-25 2011-05-31 Impress Group Bv Sposób przygotowywania i formowania wieczka oraz wieczko
EP2055641A1 (fr) 2007-10-29 2009-05-06 Impress Metal Packaging S.A. Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle
CH701451A2 (de) 2009-07-09 2011-01-14 Soudronic Ag Verfahren und Vorrichtung zur Herstellung von Aufreissdeckeln.
EP2646328B1 (fr) * 2010-11-29 2016-05-11 Crown Packaging Technology, Inc. Fermeture
CH705595A1 (de) * 2011-10-05 2013-04-15 Soudronic Ag Verfahren und Vorrichtung zur Herstellung von Aufreissdeckeln.
EP3279105A1 (fr) * 2016-08-02 2018-02-07 Amcor Flexibles Singen GmbH Bague de couvercle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020050493A1 (en) * 1999-02-10 2002-05-02 Ball Melville Douglas Can with peelably bonded closure
DE10022553C1 (de) 2000-05-10 2001-07-05 Rasselstein Hoesch Gmbh Verfahren zum Herstellen eines Ringteils aus Blech für einen Dosendeckel
DE602004011766D1 (de) * 2003-07-01 2008-03-27 Crown Packaging Technology Inc Verschluss
DE10338445B4 (de) * 2003-08-19 2007-02-08 IMPRESS Metal Packaging S.A., Crosmières Deckelring mit geneigtem Flachsteg

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9617056B2 (en) 2006-02-03 2017-04-11 Ardagh Mp Group Netherlands B.V. Expandable container having lid for providing headspace control in a food can
US10017313B2 (en) 2006-02-03 2018-07-10 Ardagh Mp Group Netherlands B.V. Expandable container having lid for providing headspace control in a food can

Also Published As

Publication number Publication date
DK1945522T3 (da) 2010-01-25
PL1945522T3 (pl) 2010-02-26
DE502006004890D1 (de) 2009-10-29
EP1945522A1 (fr) 2008-07-23
ATE442996T1 (de) 2009-10-15
SI1945522T1 (sl) 2010-01-29
ES2333167T3 (es) 2010-02-17
CY1110072T1 (el) 2015-01-14
EP1777165A1 (fr) 2007-04-25
WO2007045385A1 (fr) 2007-04-26
PT1945522E (pt) 2009-12-11

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