EP3498393B1 - Outil de roulage du goulot d'une canette - Google Patents

Outil de roulage du goulot d'une canette Download PDF

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Publication number
EP3498393B1
EP3498393B1 EP17208176.2A EP17208176A EP3498393B1 EP 3498393 B1 EP3498393 B1 EP 3498393B1 EP 17208176 A EP17208176 A EP 17208176A EP 3498393 B1 EP3498393 B1 EP 3498393B1
Authority
EP
European Patent Office
Prior art keywords
collet
hollow
inner cylinder
outer body
tool
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
EP17208176.2A
Other languages
German (de)
English (en)
Other versions
EP3498393A1 (fr
Inventor
Jan Sedlacek
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.)
Moravia Cans AS
Original Assignee
Moravia Cans AS
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 Moravia Cans AS filed Critical Moravia Cans AS
Priority to ES17208176T priority Critical patent/ES2886338T3/es
Priority to HUE17208176A priority patent/HUE054360T2/hu
Priority to SI201730781T priority patent/SI3498393T1/sl
Priority to EP17208176.2A priority patent/EP3498393B1/fr
Publication of EP3498393A1 publication Critical patent/EP3498393A1/fr
Application granted granted Critical
Publication of EP3498393B1 publication Critical patent/EP3498393B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2623—Curling

Definitions

  • the invention relates to a forming of cans.
  • Metal cans made from aluminium and aluminium alloys or from steel are widely used in packaging industry for drinks, cosmetics, food industry or for technical use.
  • Majority of them are pressure aerosol cans which contain variety of products such as deodorants, hairspray, shaving foam, lacquers or paint, oils, etc.
  • the second major part of the production are beverage cans.
  • Such cans are currently mass production goods that need to be produced economically in the largest quantities. That is why there are specially developed production lines that carry out an optimized production process. Such lines are described in bloc or in parts, e.g., in documents EP 2 103 370 B1 , EP 0 275 369 B1 , US 3,646,840 or US 3,878,743 .
  • the cans are divided in one-piece (monobloc) cans or multi-part cans.
  • the input blanks are first shaped to form a cylindrical hollow body.
  • backward extrusion or D&I (Draw and Ironed) technology is used. Such procedures are described, for example, in EP 1 531 952 B1 , EP 1 731 239 B1 or 1 461 232 B1 .
  • an aluminum slug is used for backward extrusion, from which a hollow body is formed by one stroke of the press ram. The slug diameter is approximately the same as the diameter of the can formed.
  • necking machine For shaping of can shoulder the necking machines are used.
  • the most common technical solution of necking machine which is shown in Fig. 10 comprises the revolving plate 48 which performs rotational intermittent or stepping motion and is equipped with a plurality of clamping stations 3 arranged along its circumference.
  • the purpose of the clamping stations 3 is to temporarily hold the can 2, typically by means of pneumatically expandable rings.
  • the machine further comprises the opposite tool plate 4 which is capable of performing reciprocating motion and carries the forming tools 47 arranged in fixed positions along its circumference.
  • the individual tools serve for shaping the upper edge of the hollow body of the can in a progressive manner until the latter assumes its final shape including a rim.
  • US2011/0011896 A1 discloses a method of curling a steel tube. It is proposed either gradual necking as it is the case of aluminium cans, or to introduce additional heating up using ultrasonic vibration for better formability.
  • Such procedures can function when it concerns a favourably shaped shoulder (e.g., a curved shoulder) which has higher resistance to axial load and hence a greater resistance to deformation during forming of an shoulder and curling on gradual necking machines - see Fig. 10 .
  • a favourably shaped shoulder e.g., a curved shoulder
  • the force from the forming tools exceeds the axial resistance of the can and due to this to the deformation of the shoulder, especially during the curling process.
  • the deformation during curling operation may also occur due to the thin wall of the can's shoulder or when using a material with higher deformation resistance (aluminium alloys, steel).
  • the aim of the present invention is to provide a device for curling of the neck of cans having reduced axial strength, whether due to unfavourable shoulder shape, or thin-walled cans and cans made of a material with higher deformation resistance (aluminium alloy, steel).
  • Fig.1 is a view of a can before curling
  • Fig. 2 is a view of a can after curling
  • Fig. 3 represents a tool in an initial position inside of the can
  • Fig. 4 is a detail of a collet of the tool
  • Fig. 5 represents a tool in the initial phase of curling
  • Fig. 6 represents a tool in the end phase of the can curling
  • Fig. 7 is a perspective view of parts of stop mechanism
  • Fig.8 is an alternative embodiment of a collet
  • Fig.9 is an systematic illustration of main parts of the tool according to the invention
  • Fig.10 is schematic illustration of a necking machine.
  • Fig. 1 in a schematic cross-section view of the can 2 before curling of a neck 37, it is provided with a seat 35 for fixation of the plastic cover and with an shoulder 36 with a relatively sharp angle to the plane which is perpendicular to the axis of the can 2.
  • this sharp angle ⁇ in the range 10 to 50° with respect to the plane, which is perpendicular to the longitudinal axis of the can 2, as shown in Fig. 2 , is in combination with the thickness of the wall and the material of the can 2 the reason of buckling of the can 2 caused by the pressure of the tools from above.
  • the main parts of the tool 1 for curling of the can neck 37 are expansion control device 46, collet 6 and stop mechanism 45, which can be seen on Fig.9 .
  • the expansion control device 46 is created as an outer body 20 (see Fig. 3 ) in which parts for controlling the segments 12 of the collet 6 are arranged and a cooperating stop mechanism 45 by means of which said parts for controlling the segments 12 of the collet 6 are activated.
  • the expansion control device (46) and stop mechanism (45) are connected by interconnecting means created as a rod 9.
  • Fig. 3 the tool 1 according to the invention is inserted through the neck into the can 2. This is the initial position inside the can 2 and Fig. 4 is a detail of the collet 6 mechanism.
  • the can 2 is clamped in a clamping center 3.
  • the tool 1 is clamped through the outer body 20 suitable to be fixed on a tool plate 4 by means of nuts 5.
  • the tool plate 4 performs a linear reciprocating movement in the direction of the double arrow.
  • a frame 29 of the stop mechanism 45 is arranged on the opposite side than that of the clamping center 3 in the direction of the outer body.
  • a movable stop 7 is provided which cooperates with the fixed stop 8.
  • the position of the fixed stop 8 is adjustable by means of a pivoting mechanism 28 which is mounted on the frame 29 using screws 30. This is well seen in Fig. 7 .
  • the outer body 20 has two hollows, namely a rear hollow 40 and a front hollow 44.
  • the rear hollow 40 is terminated by a bearing 19 and a rod 9 passes it through, around which a main spring 18 is provided.
  • In the front hollow 44 there are arranged mechanical elements controlling the movement of segments 12 of the collet 6.
  • a collet clutch 11 is fastened into the front hollow 44 of the outer body 20 Into the front hollow 44 of the outer body 20 extends the end of the rod 9 on which a collet clutch 11 is fastened.
  • a holder 10 by one of its end is fastened, and at the other end segments 12 of the collet 6 are arranged swingably from the basic closed to the opened position.
  • Segments 12 are provided on the inner side with a transverse groove 43 enclosing in a close position a collar 41 provided on the holder 10.
  • an extension mandrel 15 is provided slidingly which spreads out the segments 12 of the collet 6 and which is firmly arranged in an inner cylinder 16 and the inner cylinder 16 is arranged movably within the guide cylinder 24.
  • the inner cylinder 16 has a front cavity oriented towards the segments 12 of the collet 6 and the rear cavity facing towards rod 9.
  • a curling flange 25 with a curling profile 38 provided at its inner edge is mounted in the front cavity of the inner cylinder 16 .
  • the curling profile 38 then curies the neck 37.
  • a main spring 18 abuts with its one end the seat in the rear hollow 40 of the inner cylinder 16 and with the other end the bearing 19 terminating the rear hollow 40.
  • a front spring 22 in the front hollow 20 of the clutch seat 11 is arranged being mounted from one side in the clutch seat 11 and from the other side in the spacer 23 on the wall of the front hollow 44 of the outer body 20.
  • Fig. 3 therefore, illustrates the condition when the segments 12 of the collet 6 of the tool 1 are already inside the can 2 but they are still in the closed position.
  • the movable stop 7, which is arranged on the rod 9, comes into contact with the fixed stop 8, which is arranged on the mechanism 28 which is fixed on the frame 29 by means of screws 30.
  • the parts of the tool 1, such as the rod 9, the holder 10 of the collet 6 segments 12 and the collet clutch 11 stop to perform forward movement.
  • the collet clutch 11 is firmly arranged on the rod 9 and in the collet clutch 11 the holder 10 of the segments 12 is then firmly arranged.
  • the segments 12 of the collet 6 are provided on the inner side with a transverse groove 43 which engages in the rest position into the collar 41 on the holder 10. This is clearly seen in Fig. 4 . Segments (12) of the collet (6) are spreading out in the direction to the device (46).
  • the segments 12 of the collet 6 are attached to the holder 10 of the segments 12 of the collet 6 by means of pins 13 which are locked by screws 14.
  • the angle of opening of the segments 12 of the collet 6 is determined by the geometry of the expanding mandrel 15 which is screwed into the inner cylinder 16.
  • This inner cylinder 16 is arranged movably in the guide cylinder 24 which is on the contrary arranged firmly at the front face of the outer body 20.
  • the end position of the opening of the segments 12 of the collet 6 is determined by the front contact of the expanding mandrel 15 and by the collar 41 of the holder 10.
  • the holder 10 of the segments 12 of the collet 6 is arranged in the expanding mandrel 15 by means of sliding bush 17.
  • the curling flange 25 which is mounted in the outer body 20 of the tool 1 and delimited by the guide cylinder 24 from the inner side and by a spacer ring 26 with locking nut 27 from the outer side, is moving along the cylindrical surface of the expanding mandrel 15 by means of the bearing 34, due to this comes to a contact of the curling profile 38 with the neck 37 of the can 2 and subsequently to curling of the can 2. This is already the state shown in Fig. 6 .
  • the axial position of the segments 12 of the collet 6 is adjustable relative to the shoulder 36 of the can 2 by the pivoting mechanism 28 which is attached to the frame 29 of the stop 8 by means of screws 30.
  • the curling flange 25 with the curling profile 38 is moved away from the neck 37 of the can 2 and then the segments 12 of the collet 6 are returned into their initial position.
  • the segments 12 of the collet 6 are returned to the initial position by means of a bellewille spring 32 the preload of which can be controlled by adjusting nuts 33.
  • the contact between the movable stop 7 and the fixed stop 8 is interrupted.
  • the axial reciprocating movement of the rod 9, of the holder 10 of the segments 12 of the collet 6 and of the clutch 11 together with the entire tool 1 assembly is performed, due to this the expansion collet 6 is pulled out of the interior of the can 2.
  • the result of the work with above described tool is a one-piece can 2 of steel sheet with the curled neck 37 provided by the seat 35 for fixation of the plastic cover, and the can 2 is provided with the straight shoulder 36 formed at an angle of 10 to 50° with respect to the plane perpendicular to the longitudinal axis of the can 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Claims (2)

  1. Outil de roulage du goulot d'une canette faisant partie de la plaque porte-outils, caractérisé par un dispositif (46) de contrôle de l'expansion de la pince (6), dans lequel un moyen de liaison en forme de tringle (9) est logé à une extrémité via un accouplement (11) qui se trouve à l'intérieur du dispositif (46), le tringle 9 étant par contre pourvue d'un mécanisme d'arrêt (45) comprenant un bâti (29) et une butée mobile (7) disposée sur le tringle (9) qui coopère avec la butée fixe (8), dont la position est réglable au moyen d'un mécanisme de rotation (28) qui est fixé au châssis (29) au moyen de vis (30), un support (10) étant fixé dans l'accouplement (11), à l'autre extrémité duquel est disposée une pince de dilatation (6), qui en position inactive peut être insérée dans le récipient (2) et ses segments (12) s'ouvrent vers le dispositif d'expansion (46). Le dispositif d'expansion (46) étant conçu comme un corps extérieur (20) adapté pour être logé dans plaque porte-outils (4), exécutant un mouvement de va-et-vient rectiligne avec le cylindre intérieur (16), dans lequel le corps extérieur (20) a deux cavités, à savoir une cavité arrière (40) et une cavité avant (44), et le cylindre intérieur (16) est disposé de manière mobile dans un cylindre de guidage (24) qui est disposé de manière fixe dans la cavité avant (44) du corps extérieur (20), et le cylindre intérieur (16) a une cavité avant orientée vers les segments (12) du pince (6), et une bride de sertissage (25) avec un profil de sertissage (38) est logée dans la cavité avant du cylindre intérieur (16), qui est sur son bord intérieur, dans lequel les segments (12) de la pince (6) sont pourvus à l'intérieur d'une rainure transversale (43) enfermant en position de repos un collier (41) formé sur le support (10). Le support (10) a dans la cavité avant (44) du corps extérieur (20) un mandrin d'expansion (15) est agencé, le mandrin d'expansion (15) étant aligné dans le cylindre intérieur (16) et un palier lisse (31) étant aligné entre le rouleau de guidage (24) et le cylindre intérieur (16), la cavité arrière (40) a un ressort principal (18) qui repose à une extrémité sur le siège du cylindre intérieur (16) et à l'autre extrémité sur un palier (19) terminant la cavité arrière (40), autour du ressort principal (18) se trouvant dans la cavité avant (44) un ressort extérieur (22) disposé sur le corps extérieur (20) monté d'un côté dans le siège d'accouplement (11) et de l'autre côté dans une entretoise (23) sur la paroi de la cavité avant (44) du corps extérieur (20).
  2. Outil selon la revendication 1, caractérisé en ce que la pince (6) est réalisée sous la forme d'un mandrin extensible.
EP17208176.2A 2017-12-18 2017-12-18 Outil de roulage du goulot d'une canette Active EP3498393B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES17208176T ES2886338T3 (es) 2017-12-18 2017-12-18 Herramienta para el plegado del cuello de una lata
HUE17208176A HUE054360T2 (hu) 2017-12-18 2017-12-18 Tartály nyakának peremezésére szolgáló szerszám
SI201730781T SI3498393T1 (sl) 2017-12-18 2017-12-18 Orodje za robljenje vratu pločevinke
EP17208176.2A EP3498393B1 (fr) 2017-12-18 2017-12-18 Outil de roulage du goulot d'une canette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17208176.2A EP3498393B1 (fr) 2017-12-18 2017-12-18 Outil de roulage du goulot d'une canette

Publications (2)

Publication Number Publication Date
EP3498393A1 EP3498393A1 (fr) 2019-06-19
EP3498393B1 true EP3498393B1 (fr) 2021-03-03

Family

ID=60673846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17208176.2A Active EP3498393B1 (fr) 2017-12-18 2017-12-18 Outil de roulage du goulot d'une canette

Country Status (4)

Country Link
EP (1) EP3498393B1 (fr)
ES (1) ES2886338T3 (fr)
HU (1) HUE054360T2 (fr)
SI (1) SI3498393T1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646840A (en) 1969-10-27 1972-03-07 Continental Can Co Trimming head for metal cans
US3878743A (en) 1973-12-17 1975-04-22 H L Fisher Mfg Co Inc Can shearing apparatus
US4173883A (en) * 1978-08-18 1979-11-13 The Continental Group, Inc. Necked-in aerosol containers
EP0275369B1 (fr) 1987-01-21 1992-05-20 FRATTINI S.p.A.-COSTRUZIONI MECCANICHE Machine pour former des cônes et colerettes pour boîtes aérosols et analogues
GB2383879A (en) 2002-01-03 2003-07-09 Autoliv Dev Removable seat detection arrangement for use with a vehicle safety system
US20040035871A1 (en) 2002-08-20 2004-02-26 Thomas Chupak Aluminum aerosol can and aluminum bottle and method of manufacture
US7464573B2 (en) * 2006-03-31 2008-12-16 Belvac Production Machinery, Inc. Apparatus for curling an article
EP2103370B1 (fr) 2008-03-17 2012-05-02 Martinenghi S.r.l. Appareil de cisaillement de corps cylindriques creux
US20110011896A1 (en) 2009-07-20 2011-01-20 Diamond George B Steel one-piece necked-in aerosol can

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3498393A1 (fr) 2019-06-19
ES2886338T3 (es) 2021-12-17
HUE054360T2 (hu) 2021-09-28
SI3498393T1 (sl) 2022-01-31

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