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EP1519802B1 - Method for producing a can body and a can end ring - Google Patents

Method for producing a can body and a can end ring Download PDF

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Publication number
EP1519802B1
EP1519802B1 EP03735576A EP03735576A EP1519802B1 EP 1519802 B1 EP1519802 B1 EP 1519802B1 EP 03735576 A EP03735576 A EP 03735576A EP 03735576 A EP03735576 A EP 03735576A EP 1519802 B1 EP1519802 B1 EP 1519802B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical
ring
lid
base
preform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03735576A
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German (de)
French (fr)
Other versions
EP1519802A1 (en
Inventor
Sven Bauer
Reinhart Geisler
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 EP03735576A priority Critical patent/EP1519802B1/en
Publication of EP1519802A1 publication Critical patent/EP1519802A1/en
Application granted granted Critical
Publication of EP1519802B1 publication Critical patent/EP1519802B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/715—Method of making can bodies

Definitions

  • the invention relates to a method for producing a cylindrical, seamless can body and a cover ring made of metal, wherein the connectable to the opening edge of a can body lid ring delimits a removal opening and on the cover ring to form a can lid a discharge opening covering the sealing membrane is attachable, in which method a cylindrical ring is formed into a lid ring.
  • the EP-A-1 029 613 discloses a method according to the preamble of claim 1.
  • 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 two above-mentioned methods for producing a cover ring starting from a cylindrical ring have the advantage of a significantly reduced scrap fraction compared to the classic cover ring production, in which first a sheet metal disk formed and then punched to form the cover ring the removal opening.
  • the invention has for its object to provide a method of the type mentioned, with which the scrap content in the production of can bodies and cover rings can be further reduced.
  • the underlying idea of the method according to the invention to provide a cylindrical ring for the production of a lid ring in the manufacture of a can body leads to the desired minimization of the scrap portion, which is limited to the trimming of the opening edge of the can body preform thus produced and which is not greater than the proportion of scrap resulting from the production of seamless can bodies.
  • the inventive method can be integrated with little investment in an existing production line. In the simplest case, only the arrangement of a second knife or another cutting or separating device at a distance from the existing trimming device is required.
  • the separated from the can body preform cylindrical ring is preferably formed into a cover ring with a bead for fixing on the opening edge of a can body and with a lying in the top plane annular surface for fastening the closure membrane.
  • the cylindrical ring is already filled after an intermediate drawing step, i. before complete molding of the can body preform, separated from this.
  • the cylindrical ring in this case has a larger material thickness and a larger diameter than the end-molded can body.
  • Suitable metals for carrying out the process according to the invention are all metals known for can production, such as aluminum, steel or tinplate. These metals can also be painted or reshaped with a plastic coating of, for example, polypropylene.
  • the cover ring does not necessarily have to be used together with the can body produced by this method. It can be used in one- or two-piece can bodies made of different metals or also in can bodies made of materials other than metal, for example of plastic or of coated board materials.
  • cylindrical ring separated from a can body preform or the lid ring made therefrom does not necessarily have to be used together with the can body made from the same can body preform. Rather, in practice, a separate processing of the can body and the cylindrical rings and the subsequent disorderly merging of can bodies and made of the cylindrical rings lid rings may be a convenient method variant.
  • An in Fig. 1 shown can body preform 10 has a one-sided with a integral bottom 14 closed cylindrical can body 12 in the form of a cylindrical tube piece.
  • the can body preform 10 can be made in known manner from a metal disc or blank by single or multi-stage deep drawing, ironing, ironing, extrusion, and other massive forming processes. In these methods, the bottom 14 integrally formed on the can body 12 results as the remainder of the metal disk used as a blank after the forming thereof.
  • tinplate, chromed steel sheet or aluminum sheet can be used in a known manner.
  • a cylindrical ring 18 is separated from the can body preform 10.
  • the initial height of the can body preform 10 is selected so that after trimming and the separation of the cylindrical ring 18, the remaining remainder of the can body preform 10 after at least one further drawing step corresponds to the desired can body 20.
  • the cylindrical ring 18 is in a known manner by several successive Umformoperationen to the in Fig. 4 illustrated cover ring 22 formed.
  • the cover ring 22 has a conventional bead 24, the free end the edge formed by the first horizontal section a corresponds.
  • the beading 24 merges into a horizontal annular surface 26.
  • the inner edge 28 of the removal opening 30 delimiting annular surface 26 is to eliminate a risk of injury and to increase the rigidity of the cover ring 22 with radially outwardly directed cutting edge, which corresponds to the resulting by the second horizontal section b edge, rolled up.
  • Fig. 5 is the lid ring of Fig. 4 provided with a sealing membrane 32.
  • the sealing membrane 32 rests against the annular surface 26 and is connected thereto via an adhesive or sealing layer 34.
  • the material used for the sealing membrane 32 is, for example, a foil made of aluminum or of sheet steel, which may optionally have a heat-sealable coating.
  • the closure membrane 32 may be provided with a tear tab 36. In this case, the seal between the sealing membrane 32 and annular surface 26 is adjusted so that the sealing membrane from the annular surface or from the sealing edge by peeling (peeling) can be removed.
  • the closure membrane 32 is inseparably connected to the lid ring 22. In this case, the membrane is pierced to the opening and removed along the inner edge of the annular surface 26 from the cover ring 22.
  • the cover ring 22 provided with the closure membrane 32 is crimped onto the opening edge 21 of the can body 20 after the filling of a filling material as a can lid 38.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

The invention relates to a method for producing a cylindrical, seamless can base (20) from metal with a pertaining can lid. Said can lid comprises a lever ring which can be linked with the opening edge (21) of the can base (20) and limits a withdrawal opening, and a closing membrane which is disposed on the lever ring and covers the withdrawal opening. According to the method, a cylindrical, seamless can base preform (10) is produced, the opening edge (11) of the can base preform (10) is trimmed and a cylindrical ring (18) is cut off from said preform. The height of the can base preform (10) is adapted to form, when the cylindrical ring (18) is cut off, the can base (20). The inventive method allows reduction of the amount of scrap metal in the production of can bases and lever rings.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines zylinderförmigen, nahtlosen Dosenkörpers und eines Deckelringes aus Metall, wobei der mit dem Öffnungsrand eines Dosenkörpers verbindbare Deckelring eine Entnahmeöffnung begrenzt und auf dem Deckelring zur Bildung eines Dosendeckels eine die Entnahmeöffnung überdeckende Verschlussmembran anbringbar ist, bei welchem Verfahren ein zylinderförmiger Ring zum Deckelring umgeformt wird.The invention relates to a method for producing a cylindrical, seamless can body and a cover ring made of metal, wherein the connectable to the opening edge of a can body lid ring delimits a removal opening and on the cover ring to form a can lid a discharge opening covering the sealing membrane is attachable, in which method a cylindrical ring is formed into a lid ring.

Bei bekannten Dosendeckeln der eingangs genannten Art mit einem Deckelring und auf diesem angeordneter Verschlussmembran erstreckt sich die Entnahmeöffnung bis in die Nähe des Bördelrandes, so dass nach dem Entfernen der Verschlussmembran nur einer schmale, vom Bördelrand radial nach innen angrenzende Ringfläche verbleibt. Nach dem Entfernen der Verschlussmembran, die in den meisten Fällen als Aufreissfolie ausgestaltet ist, wird nach dem Abziehen (Peelen) der Membran, ähnlich wie bei einem Vollaufreissdeckel, eine verhältnismässig grosse Behälteröffnung geschaffen, wodurch das Füllgut leicht zugänglich wird. Ein weiterer Vorteil dieses Deckelsystems liegt darin, dass das Füllgut sterilisiert werden kann.In known can lids of the type mentioned above with a cover ring and arranged on this sealing membrane, the removal opening extends into the vicinity of the flanged edge, so that after removal of the closure membrane only a narrow, radially inwardly adjacent from the flanged rim annular surface remains. After removing the sealing membrane, which is designed in most cases as tear-open, after peeling (peeling) of the membrane, similar to a full rip open, a relatively large container opening created, making the contents is easily accessible. Another advantage of this cover system is that the contents can be sterilized.

Die EP-A-1 029 613 offenbart ein Verfahren gemäß dem Oberbegriff des Anspruchs 1.The EP-A-1 029 613 discloses a method according to the preamble of claim 1.

Bei einem aus der EP-A-1 153 840 bekannten Verfahren zur Herstellung eines Deckelringes für einen Dosendeckel mit Verschlussmembran wird zunächst ein ebenes Blechteil zu einem zylindrischen Rohr umgeformt. Die axial verlaufenden Ränder des Rohres werden zusammengepresst und miteinander verschweisst, was mittels eines Laserstrahls erfolgt und zur Bildung einer Stumpfstossschweissnaht führt. Das Rohr wird sodann in gleich lange Rohrabschnitte bzw. zylinderförmige Ringe unterteilt. Jeder zylinderförmige Ring wird zu einem Deckelring mit einem Bördelrand zur Befestigung auf einem Dosenrumpf und zu einer ringförmigen Auflagefläche für die spätere Festlegung der Verschlussmembran umgeformt. Aus der DE-A-43 32 306 ist es zudem bekannt, an Stelle des zu einem zylindrischen Rohr umgeformten und geschweissten Blechteils durch mehrstufiges Tiefziehen eine möglichst hohe Dose mit zylindrischer Wandung zu formen und anschliessend die zylindrische Wandung in mehrere, zylinderförmige Ringe aufzuteilen. Der verbleibende Bodenteil der Dose wird als Schrott verworfen.At one of the EP-A-1 153 840 known method for producing a cover ring for a can lid with closure membrane, 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. From the DE-A-43 32 306 It is also known, instead of the formed into a cylindrical tube and welded sheet metal part by multi-stage deep drawing the highest possible dose with cylindrical Form wall and then divide the cylindrical wall into several cylindrical rings. The remaining bottom part of the can is discarded as scrap.

Die beiden vorstehend erwähnten Verfahren zur Herstellung eines Deckelringes ausgehend von einem zylinderförmigen Ring haben gegenüber der klassischen Deckelringherstellung, bei welcher zunächst eine Blechscheibe umgeformt und anschliessend zur Bildung des Deckelringes die Entnahmeöffnung ausgestanzt wird, den Vorteil eines erheblich verminderten Schrottanteils.The two above-mentioned methods for producing a cover ring starting from a cylindrical ring have the advantage of a significantly reduced scrap fraction compared to the classic cover ring production, in which first a sheet metal disk formed and then punched to form the cover ring the removal opening.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit welchem der Schrottanteil bei der Herstellung von Dosenkörpern und Deckelringen weiter vermindert werden kann.The invention has for its object to provide a method of the type mentioned, with which the scrap content in the production of can bodies and cover rings can be further reduced.

Diese Aufgabe wird durch den Gegenstand des Anspruchs 1 gelöst.This object is solved by the subject matter of claim 1.

Die dem erfindungsgemässen Verfahren zugrundeliegende Idee, bei der Herstellung eines Dosenkörpers im gleichen Arbeitsgang einen zylinderförmigen Ring zur Herstellung eines Deckelringes bereitzustellen, führt zu der gewünschten Minimierung des Schrottanteils, der sich auf das Besäumen des Öffnungsrandes der so hergestellten Dosenkörpervorform beschränkt und der nicht grösser ist als der Schrottanteil, der sich bei der Herstellung nahtloser Dosenkörper ergibt. Das erfindungsgemässe Verfahren kann mit geringem Investitionsaufwand in eine bestehende Produktionslinie integriert werden. Im einfachsten Fall ist nur die Anordnung eines zweiten Messers oder einer anderen Schneid- bzw. Trennvorrichtung in Abstand zur bestehenden Besäumvorrichtung erforderlich.The underlying idea of the method according to the invention to provide a cylindrical ring for the production of a lid ring in the manufacture of a can body leads to the desired minimization of the scrap portion, which is limited to the trimming of the opening edge of the can body preform thus produced and which is not greater than the proportion of scrap resulting from the production of seamless can bodies. The inventive method can be integrated with little investment in an existing production line. In the simplest case, only the arrangement of a second knife or another cutting or separating device at a distance from the existing trimming device is required.

Der von der Dosenkörpervorform abgetrennte zylinderförmige Ring wird bevorzugt zu einem Deckelring mit einem Bördelrand zur Festlegung auf dem Öffnungsrand eines Dosenkörpers und mit einer in der Deckelebene liegenden Ringfläche zur Befestigung der Verschlussmembran umgeformt.The separated from the can body preform cylindrical ring is preferably formed into a cover ring with a bead for fixing on the opening edge of a can body and with a lying in the top plane annular surface for fastening the closure membrane.

Da die Herstellung der Dosenkörpervorform in mehreren Ziehschritten erfolgt, wird erfindungsgemäß der zylinderförmige Ring bereits nach einem Zwischenziehschritt, d.h. vor dem vollständigen Ausformen der Dosenkörpervorform, von dieser abgetrennt. Der zylinderförmige Ring hat in diesem Fall eine grössere Materialdicke und einen grösseren Durchmesser als der endgeformte Dosenkörper.Since the production of the can body preform takes place in several drawing steps, according to the invention the cylindrical ring is already filled after an intermediate drawing step, i. before complete molding of the can body preform, separated from this. The cylindrical ring in this case has a larger material thickness and a larger diameter than the end-molded can body.

Als Metall zur Durchführung des erfindungsgemässen Verfahren eignen sich alle zur Dosenherstellung bekannten Metalle wie Aluminium, Stahl oder Weissblech. Diese Metalle können auch lackiert oder mit einer Kunststoffbeschichtung aus beispielsweise Polypropylen umgeformt werden.Suitable metals for carrying out the process according to the invention are all metals known for can production, such as aluminum, steel or tinplate. These metals can also be painted or reshaped with a plastic coating of, for example, polypropylene.

Der Deckelring muss nicht notwendigerweise zusammen mit dem nach diesem Verfahren hergestellten Dosenkörper verwendet werden. Er kann bei ein- oder zweiteiligen Dosenkörpern aus unterschiedlichen Metallen oder auch bei Dosenkörpern aus anderen Werkstoffen als Metall, beispielsweise aus Kunststoff oder aus beschichteten Kartonmaterialien, eingesetzt werden.The cover ring does not necessarily have to be used together with the can body produced by this method. It can be used in one- or two-piece can bodies made of different metals or also in can bodies made of materials other than metal, for example of plastic or of coated board materials.

Es versteht sich von selbst, dass der von einer Dosenkörpervorform abgetrennte zylinderförmige Ring bzw. der daraus hergestellte Deckelring nicht notwendigerweise mit dem aus derselben Dosenkörpervorform hergestellten Dosenkörper zusammen verwendet werden muss. Vielmehr dürfte in der Praxis eine getrennte Weiterverarbeitung der Dosenkörper und der zylinderförmigen Ringe und das spätere ungeordnete Zusammenführen von Dosenkörpern und aus den zylinderförmigen Ringen gefertigten Deckelringen eine zweckmässige Verfahrensvariante sein.It goes without saying that the cylindrical ring separated from a can body preform or the lid ring made therefrom does not necessarily have to be used together with the can body made from the same can body preform. Rather, in practice, a separate processing of the can body and the cylindrical rings and the subsequent disorderly merging of can bodies and made of the cylindrical rings lid rings may be a convenient method variant.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in

  • Fig 1 die Seitenansicht einer Dosenkörpervorform mit Zipfelbildung;
  • Fig 2 die Seitenansicht der Dosenkörpervorform von Fig. 1 mit abgetrennten Zipfeln;
  • Fig. 3 die Seitenansicht der Dosenkörpervorform von Fig. 2 mit weiter abgetrenntem zylindrischen Ring;
  • Fig. 4 den teilweisen Schnitt durch einen aus dem zylinderförmigen Ring von Fig. 3 hergestellten Deckelring;
  • Fig. 5 den teilweisen Schnitt durch den Deckelring von Fig. 4 mit aufgesiegelter Verschlussmembran.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing; this shows in
  • Fig. 1 the side view of a can body preform with earing;
  • Fig. 2 the side view of the can body preform of Fig. 1 with severed corners;
  • Fig. 3 the side view of the can body preform of Fig. 2 with further separated cylindrical ring;
  • Fig. 4 the partial section through one of the cylindrical ring of Fig. 3 produced cover ring;
  • Fig. 5 the partial section through the lid ring of Fig. 4 with sealed sealing membrane.

Eine in Fig. 1 dargestellte Dosenkörpervorform 10 weist einen einseitig mit einem integralen Boden 14 verschlossenen zylinderförmigen Dosenrumpf 12 in Form eines zylinderförmigen Rohrstückes auf. Die Dosenkörpervorform 10 kann in bekannter Weise aus einer Scheibe oder Ronde aus Metall durch ein- oder mehrstufiges Tiefziehen, Abstreckziehen, Abstreck-Gleitziehen, Fliesspressen sowie durch weitere Massivumformverfahren hergestellt werden. Bei diesen Verfahren ergibt sich der am Dosenrumpf 12 integral angeformte Boden 14 als Rest der als Rohling eingesetzten Metallscheibe nach deren Umformung. Zur Herstellung der Metallscheiben oder -ronden als Rohlinge zur Herstellung der Dosenkörpervorform 10 kann in bekannter Weise Weissblech, verchromtes Stahlblech oder Aluminiumblech verwendet werden.An in Fig. 1 shown can body preform 10 has a one-sided with a integral bottom 14 closed cylindrical can body 12 in the form of a cylindrical tube piece. The can body preform 10 can be made in known manner from a metal disc or blank by single or multi-stage deep drawing, ironing, ironing, extrusion, and other massive forming processes. In these methods, the bottom 14 integrally formed on the can body 12 results as the remainder of the metal disk used as a blank after the forming thereof. To produce the metal discs or blanks as blanks for the production of the can body preform 10, tinplate, chromed steel sheet or aluminum sheet can be used in a known manner.

Die oben beschriebenen Massivumformvorgänge führen als Folge der bekannten Zipfelbildung zu einem ungleichmässig ausgebildeten Öffnungsrand 11 der auf diese Weise hergestellten Hohlkörper. Dieser ungleichmässige Rand bzw. die Zipfel 16 werden durch einen ersten Horizontalschnitt a bezüglich der senkrecht verlaufenden Dosenachse z als Schrott entfernt.The massive forming operations described above lead as a result of the known earing to a non-uniformly shaped opening edge 11 of the hollow body produced in this way. This non-uniform edge or the corners 16 are removed by a first horizontal section a with respect to the vertical doses axis z as scrap.

Gemäss den Fig. 2 und 3 wird nach dem Besäumen des Randes mit einem zweiten Horizontalschnitt b ein zylinderförmiger Ring 18 von der Dosenkörpervorform 10 abgetrennt. Hierbei wird die Ausgangshöhe der Dosenkörpervorform 10 so gewählt, dass nach dem Besäumen und dem Abtrennen des zylinderförmigen Ringes 18 der verbleibende Rest der Dosenkörpervorform 10 nach wenigstens einem weiteren Ziehschritt dem gewünschten Dosenkörper 20 entspricht.According to the FIGS. 2 and 3 After the trimming of the edge with a second horizontal section b, a cylindrical ring 18 is separated from the can body preform 10. Here, the initial height of the can body preform 10 is selected so that after trimming and the separation of the cylindrical ring 18, the remaining remainder of the can body preform 10 after at least one further drawing step corresponds to the desired can body 20.

Der zylinderförmige Ring 18 wird in bekannter Weise durch mehrere aufeinanderfolgende Umformoperationen zu dem in Fig. 4 dargestellten Deckelring 22 umgeformt.The cylindrical ring 18 is in a known manner by several successive Umformoperationen to the in Fig. 4 illustrated cover ring 22 formed.

Der Deckelring 22 weist einen üblichen Bördelrand 24 auf, dessen freies Ende der durch ersten Horizontalschnitt a entstandenen Kante entspricht. Der Bördelrand 24 geht in eine horizontale Ringfläche 26 über. Der innere Rand 28 der eine Entnahmeöffnung 30 begrenzenden Ringfläche 26 ist zur Beseitigung einer Verletzungsgefahr sowie zur Erhöhung der Steifigkeit des Deckelringes 22 mit radial nach aussen gerichteter Schnittkante, welche der durch den zweiten Horizontalschnitt b entstandenen Kante entspricht, eingerollt.The cover ring 22 has a conventional bead 24, the free end the edge formed by the first horizontal section a corresponds. The beading 24 merges into a horizontal annular surface 26. The inner edge 28 of the removal opening 30 delimiting annular surface 26 is to eliminate a risk of injury and to increase the rigidity of the cover ring 22 with radially outwardly directed cutting edge, which corresponds to the resulting by the second horizontal section b edge, rolled up.

In Fig. 5 ist der Deckelring von Fig. 4 mit einer Verschlussmembran 32 versehen. Die Verschlussmembran 32 liegt der Ringfläche 26 auf und ist mit dieser über eine Klebstoff- oder Siegelschicht 34 verbunden. Als Material für die Verschlussmembran 32 dient beispielsweise eine Folie aus Aluminium oder aus Stahlblech, die gegebenenfalls eine heisssiegelfähige Beschichtung aufweisen kann. Die Verschlussmembran 32 kann mit einer Aufreisslasche 36 versehen sein. In diesem Fall wird die Siegelung zwischen Verschlussmembran 32 und Ringfläche 26 so eingestellt, dass die Verschlussmembran von der Ringfläche bzw. vom Siegelrand durch Abziehen (Peelen) entfernt werden kann. Bei einer alternativen Ausführungsform ist die Verschlussmembran 32 untrennbar mit dem Deckelring 22 verbunden. In diesem Fall wird die Membran zur Öffnung durchstochen und entlang dem inneren Rand der Ringfläche 26 vom Deckelring 22 entfernt.In Fig. 5 is the lid ring of Fig. 4 provided with a sealing membrane 32. The sealing membrane 32 rests against the annular surface 26 and is connected thereto via an adhesive or sealing layer 34. The material used for the sealing membrane 32 is, for example, a foil made of aluminum or of sheet steel, which may optionally have a heat-sealable coating. The closure membrane 32 may be provided with a tear tab 36. In this case, the seal between the sealing membrane 32 and annular surface 26 is adjusted so that the sealing membrane from the annular surface or from the sealing edge by peeling (peeling) can be removed. In an alternative embodiment, the closure membrane 32 is inseparably connected to the lid ring 22. In this case, the membrane is pierced to the opening and removed along the inner edge of the annular surface 26 from the cover ring 22.

Der mit der Verschlussmembran 32 versehene Deckelring 22 wird nach dem Einfüllen eines Füllgutes als Dosendeckel 38 auf den Öffnungsrand 21 des Dosenkörpers 20 aufgebördelt.The cover ring 22 provided with the closure membrane 32 is crimped onto the opening edge 21 of the can body 20 after the filling of a filling material as a can lid 38.

Claims (2)

  1. Method for producing a cylindrical, seamless can body (20) with a preset height and a lid gasket (22) made of metal, wherein the lid gasket (22) connectable to the opening edge of a can body delimits a removal opening (30) and mountable on the lid gasket (22), to form a can lid (38), is a sealing membrane (32) covering the removal opening (30), in which method in several drawing steps a cylindrical, seamless can body blank mould (10) is made and a cylindrical ring (18) is cut off from this and remoulded into the lid gasket (22),
    characterised in that
    after the cylindrical ring (18) has been cut off, the can body blank mould (10) is further remoulded in at least one further drawing step to form the can body (20) with the preset height.
  2. Method according to claim 1, characterised in that the cylindrical ring (18) is remoulded to form a lid gasket (22) with a beaded edge (24) for fixing on the opening edge of a can body and with an annular face (26) located in the plane of the lid for fastening the sealing membrane (32).
EP03735576A 2002-06-27 2003-06-07 Method for producing a can body and a can end ring Expired - Lifetime EP1519802B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03735576A EP1519802B1 (en) 2002-06-27 2003-06-07 Method for producing a can body and a can end ring

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02405547A EP1375025A1 (en) 2002-06-27 2002-06-27 Method of making a container body and container end bordering ring
EP02405547 2002-06-27
PCT/EP2003/006003 WO2004002649A1 (en) 2002-06-27 2003-06-07 Method for producing a can base and a lever ring
EP03735576A EP1519802B1 (en) 2002-06-27 2003-06-07 Method for producing a can body and a can end ring

Publications (2)

Publication Number Publication Date
EP1519802A1 EP1519802A1 (en) 2005-04-06
EP1519802B1 true EP1519802B1 (en) 2008-03-26

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Application Number Title Priority Date Filing Date
EP02405547A Withdrawn EP1375025A1 (en) 2002-06-27 2002-06-27 Method of making a container body and container end bordering ring
EP03735576A Expired - Lifetime EP1519802B1 (en) 2002-06-27 2003-06-07 Method for producing a can body and a can end ring

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02405547A Withdrawn EP1375025A1 (en) 2002-06-27 2002-06-27 Method of making a container body and container end bordering ring

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EP1918041A1 (en) * 2006-10-31 2008-05-07 Crown Packaging Technology, Inc Metal closure with disc and method for producing such a metal closure with separate disc and ring from a single closure blank
ES2411931T3 (en) 2008-03-20 2013-07-09 Crown Packaging Technology, Inc. Closing
DE102011056846B4 (en) * 2011-12-22 2014-05-28 Thyssenkrupp Rasselstein Gmbh Method for producing a tear-open lid and use of a steel sheet provided with a protective layer for producing a tear-open lid
WO2021176112A1 (en) * 2020-03-04 2021-09-10 Auxiliar Conservera S.A. Method for jointly manufacturing a tin container and its lid with a detachable central membrane

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US3428010A (en) * 1967-02-03 1969-02-18 Continental Can Co Method of making a metallic can and cover
NL8301069A (en) * 1983-03-28 1984-10-16 Hoogovens Groep Bv THREE-PIECE METAL PACKAGING BUSH, SEMI-PRODUCTION FOR THE MANUFACTURE OF THIS BUSH, AND A METHOD OF MANUFACTURING METAL PACKAGING BUSES.
NL8401834A (en) * 1984-06-08 1986-01-02 Thomassen & Drijver METHOD AND APPARATUS FOR MANUFACTURING A HULL FOR A HOLDER, AND A MANUFACTURED HULL OR HOLDER.
JPH0538526A (en) * 1991-08-05 1993-02-19 Toyota Motor Corp Method for ironing and trimming cylinder part in preform
DE4332306A1 (en) 1993-09-23 1995-03-30 Rasselstein Ag Method for the production of an easy-to-open can lid from sheet metal
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EP1519802A1 (en) 2005-04-06
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MY138191A (en) 2009-05-29
US7506529B2 (en) 2009-03-24
DK1519802T3 (en) 2008-04-21
EP1375025A1 (en) 2004-01-02
WO2004002649A1 (en) 2004-01-08
ES2299706T3 (en) 2008-06-01
US20050166658A1 (en) 2005-08-04

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