EP4041472B1 - Procédé et dispositif pour la fabrication de couvercles à ouverture par déchirure - Google Patents

Procédé et dispositif pour la fabrication de couvercles à ouverture par déchirure Download PDF

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Publication number
EP4041472B1
EP4041472B1 EP20807731.3A EP20807731A EP4041472B1 EP 4041472 B1 EP4041472 B1 EP 4041472B1 EP 20807731 A EP20807731 A EP 20807731A EP 4041472 B1 EP4041472 B1 EP 4041472B1
Authority
EP
European Patent Office
Prior art keywords
punching
lid
die
tool
cutting punch
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
EP20807731.3A
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German (de)
English (en)
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EP4041472A1 (fr
Inventor
Peter Gysi
Marcel Oberholzer
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.)
Soudronic AG
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Soudronic AG
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Filing date
Publication date
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Publication of EP4041472A1 publication Critical patent/EP4041472A1/fr
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Publication of EP4041472B1 publication Critical patent/EP4041472B1/fr
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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14—Dies
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/18—Advancing work in relation to the stroke of the die or tool by means in pneumatic or magnetic engagement with the work
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices
    • 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
    • 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
    • B21D51/443—Making closures, e.g. caps easily removable closures, e.g. by means of tear strips
    • 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

Definitions

  • the invention relates to a method for producing tear-off lids according to the preamble of patent claim 1.
  • Peel-off ends are known, for example from DE-U 298 17 592 or from DE-U 92 03 953 .
  • FIG. 1 shows a lid blank 9.
  • a stack 11 which contains a plurality of such lid blanks 9, which are individually stacked and processed along the transport path by various processing stations 14, 19, 21, 25, 26, wherein lid rings 8 are first formed from the lid blanks 9 (see Fig. 2 ) and then to the finished tear-off lid 27 (see Fig. 5 ) can be further processed.
  • the cover blanks 9 are, for example, round or oval discs made of coated and thus corrosion-protected metal, in particular coated tinplate or aluminum sheet. They have, for example, a Diameter of 11 cm.
  • the conveyor device 13 which conveys the lid blanks, the lid rings and the tear-off lids in the manufacturing device 10 along the transport path in the direction of arrow A from one processing station to the next processing station, is formed in particular by two parallel toothed belts, on which receptacles for the lid blanks or lid rings are provided, as will be apparent to the person skilled in the art from WO 2006/017953 known. This, too, will not be explained further here.
  • the blank or ring to be processed is lifted from the conveyor, processed by the processing station, and returned to the conveyor. This is indicated at the processing stations with up and down arrows.
  • the drive of the processing stations is indicated below the conveyor. This is used to raise and lower the blanks and cover rings and to carry out the respective processing steps.
  • a lid ring 8 is first formed from the lid blank 9 by punching out a middle part 16 of the blank downwards and usually disposed of as waste (see Fig. 2 ). This forms the removal opening 17 of the tear-open lid, which is closed with the tear-open film 24 in a later production step. A sealing flange 18 remains adjacent to the removal opening 17. In a processing station 19, the Edge of the removal opening 17 is pulled upwards to form a collar 20 (see Fig. 3 ).
  • This collar 20 is rolled in a further processing station 21 toward or away from the removal opening, forming a so-called "curl.”
  • This curl 22 which then forms the edge of the removal opening 17, ensures that the user of the can is protected from the sharp cutting edge 23 when removing the contents of the can.
  • Curls that are rolled away from the removal opening are referred to as “reverse C-curls” or “reverse retort curls.”
  • a so-called retort curl 22 is formed (see Fig. 4 ).
  • the previous manufacturing steps were carried out in a position in which the lid blanks 9 and lid rings 8 were arranged with their future top side or with the sealing flange 18 facing downwards.
  • the blank 9 or the ring 8 is lifted from the conveyor device 13 in the individual processing stations 14, 19 and 21, processed and placed back again, whereupon the conveyor device carries out conveying steps which guide the lid blanks 9 or lid rings 8 to the next processing station.
  • a turning station 23 now follows, which turns the lid rings 8 so that during further processing the sealing flange 18 is at the top after the turning station 23 in the conveyor device 13 and in the processing stations 25, 26.
  • the tear-off film 24 is then sealed onto the sealing flange 18, which is carried out in two stages with a pre-sealing station 25 and a main sealing station 26
  • the sealing process is also known to those skilled in the art and will not be explained further here. Further processing stations may follow, in which the sealing film 24 is embossed, the tear-open tab 15 is positioned, and a leak test is carried out. This is also known to those skilled in the art and will not be explained further here.
  • finished tear-open lids 27 are dispensed (see Fig. 5 ), the removal opening 17 of which is covered by a tear-open film 24 which is sealed to the sealing flange 18.
  • the edge of the removal opening 17 is formed here by the retort curl 22.
  • the finished tear-open lid 27 can be attached to a can jacket (which is Figure 5 only indicated by a wall portion 28) and thus closes the can. This occurs during the filling process, in which the can has been filled with a product.
  • the filled can can be opened later by tearing the tear-off film 24 away from the lid ring 8 using its tear-off tab 15, thereby exposing the removal opening 17.
  • a punching or cutting burr is created on the intended outer side (underside) of the produced lid ring during the punching process of the lid blank. This is particularly suboptimal if a "reverse curl" (curling away from the removal opening) is subsequently created. From a production-technical perspective, it would be desirable if the (unavoidable) punching or cutting burr were created on the intended inner side (top side) of the produced lid ring, with the process flow and system concept otherwise unchanged.
  • the invention is based on the object of providing technical solutions with which the previously described known and established methods and devices for producing tear-off lids can be modified with the least possible plant-technical expenditure in such a way that the punching or cutting burr is created on the other side of the lid while the process sequence and plant concept remain essentially unchanged.
  • a first claimed aspect of the invention relates to a method for producing a tear-off lid.
  • a lid ring with a central removal opening surrounded by a sealing flange is formed from a lid blank by stamping with a stamping tool.
  • the stamping tool comprises a die and a cutting punch.
  • the edge of the removal opening is then formed into a collar by drawing, which protrudes from the sealing flange on the side that forms the inside of the lid during the later intended use of the lid to be produced (intended inside of the lid).
  • the collar is then rolled up at its free end and a tear-off film is then sealed or glued onto the sealing flange, on the side that will form the outside of the lid during the later intended use of the lid to be produced (intended outside of the lid).
  • the die is arranged on the side that forms the inside of the lid during the later intended use of the lid to be produced (intended inside of the lid) and the cutting punch is the side forming the outer side of the lid during the later intended use of the lid to be produced (intended lid outside) under a punching out of a punching lump into the die.
  • the punching slug thus produced is conveyed by compressed air through the die to a conveyor device, with which it is removed from the tool area.
  • the invention makes it possible to modify the currently known and established methods and devices for producing tear-off lids with very little effort in such a way that, with essentially unchanged process sequence and system concept, the punching or cutting burr is created on the side that forms the outside of the lid during the later intended use of the lid to be produced (intended outside of the lid).
  • a vacuum conveyor belt is used as the conveying device for removing the punching slug from the tool area. This also allows for reliable handling and removal of the punching slugs in a very confined space and with a minimum of moving components. Both ferromagnetic and non-ferromagnetic lid blanks, e.g., made of aluminum, can be processed.
  • Magnetic and vacuum conveyor belts are well known in the field of conveyor technology and therefore do not need to be explained in detail here.
  • the compressed air used to convey the punching slug to the conveyor is advantageously fed through the cutting punch.
  • the compressed air passing through the cutting punch exits through one or more outlet openings on the side of the cutting punch facing the lid blank or the punching slug. This allows the punching slug to be exposed to the air directly on its side facing the cutting punch and thus reliably guided away from it.
  • the compressed air passing through the cutting punch is directed to the side of the cutting punch facing the lid blank or the punching slug through several identical outlet openings, which are spaced identically apart.
  • This configuration of the outlet openings effectively prevents the punching slug from becoming tilted or jammed in the die.
  • this compressed air which is used to convey the punching slug to the conveyor device, be provided intermittently. This is advantageously done in such a way that no compressed air is provided when the tool is open and compressed air is provided when the tool is closed. This simplifies the process control and allows energy to be saved compared to a permanent supply.
  • outlet openings are only pressurized with compressed air at the beginning of the punching process or, even more preferably, only after the punching process has been completed, preferably when the end point of the movement of the Cutting punch, which is the top dead center of the cutting punch movement for upward-moving cutting punches.
  • the punching slug is completely separated from the lid blank before compressed air is applied, which has the advantage of enabling a cleanly controllable process flow.
  • the collar which is formed from the edge of the removal opening by pulling, is rolled towards the removal opening, into a C-curl or a retort curl.
  • the collar which is formed from the edge of the removal opening by pulling, is rolled away from the removal opening into a reverse C-curl or a reverse retort curl.
  • the advantages of the invention are particularly evident.
  • the cutting punch is moved during punching and the die is stationary, that the cutting punch penetrates the die from bottom to top during cutting, and/or that the lid ring is turned between rolling up the collar and sealing or gluing the tear-off film.
  • the cover ring is conveyed out of the cutting tool in a first transport direction and the punching slug is
  • the conveyor system removes the punching slugs from the tool area in a second transport direction, which runs transversely to the first transport direction, in particular perpendicular to the first transport direction.
  • a second, unclaimed aspect of the invention relates to a device for producing tear-open lids, in which a tear-open film is sealed or glued to the upper side of the lid on a sealing surface arranged around a removal opening.
  • the device is preferably designed for producing tear-open lids according to the method according to the first aspect of the invention.
  • the device comprises a first conveyor for lid blanks, lid rings, and tear-off lids, as well as processing stations, which are provided in succession in the conveying direction for processing the lid blanks, lid rings, and tear-off lids.
  • a first processing station is designed as a punching station for forming a lid ring with a central removal opening surrounded by a sealing flange from a lid blank by punching the same with a punching tool comprising a die and a cutting punch.
  • a second processing station of the device is designed to form a collar projecting from the lid ring, a third processing station for rolling the collar into a curl, and a fourth processing station for sealing or adhering a tear-off film to the sealing flange.
  • the first processing station is designed in such a way that during the punching process the die is positioned on the later intended
  • the lid to be produced is arranged on the side that forms the inside of the lid (intended inside of the lid) during use, and the cutting punch is moved into the die from the other side, i.e. from the side that forms the outside of the lid during later intended use of the lid to be produced (intended outside of the lid), thereby punching out a punching slug.
  • Devices are provided for conveying the punching slug through the die using compressed air to a second conveyor device assigned to the first processing station, with which the punching slug is removed from the tool area during intended operation of the device.
  • the second conveyor device is preferably a magnetic conveyor belt or a vacuum conveyor belt with which the punching slugs can be removed from the tool area.
  • the cutting punch advantageously has one or more air channels for transporting the compressed air within it, which is used in normal operation to convey the punching slug by means of compressed air through the die to the second conveying device.
  • the cutting punch advantageously has one or more outlet openings for the compressed air on its side facing the lid blank or the punching slug.
  • the punching slug can be pressurized with compressed air directly on its side facing the cutting punch, thus reliably from there to the second conveyor system.
  • the cutting punch has several, e.g., three, in particular identical exit openings, which are spaced identically apart. Such a configuration of the exit openings effectively prevents the punching slug from jamming in the die.
  • the device has a control device with which, during normal operation, the compressed air used to convey the punching slug to the second conveyor device can be or is provided intermittently, preferably in such a way that no compressed air is provided when the tool is open and compressed air is provided when the tool is closed, particularly upon reaching the end point of the cutting punch's movement. This simplifies process control and saves energy.
  • the third processing station is designed such that the collar, which is formed from the edge of the removal opening by pulling, is rolled towards the removal opening, into a C-curl or a retort curl.
  • the third processing station is designed such that the collar, which is formed from the edge of the removal opening by pulling, is rolled away from the removal opening into a reverse C-curl or a reverse retort curl.
  • the advantages of the invention are particularly evident.
  • the device according to the invention is designed in such a way that during the punching process the cutting punch is moved and the die is stationary, that during cutting the cutting punch penetrates the die from bottom to top and/or that the lid ring is turned in a turning station between the rolling of the collar and the sealing or gluing of the tear-off film.
  • the first conveyor device has a first transport direction
  • the second conveyor device has a second transport direction, which runs transversely to the first transport direction, preferably perpendicular to the first transport direction.
  • a third unclaimed aspect of the invention relates to a punching station for a device according to the second aspect of the invention, for forming a lid ring with a central removal opening surrounded by a sealing flange from a lid blank by punching.
  • the punching processing station comprises a punching tool with a fixed die and a cutting punch which, in normal punching operation, works against the die from below and moves into the die while punching out a punching lump.
  • it includes devices for conveying the punching slug during normal punching operation by means of compressed air against the force of gravity through the die to a conveyor device assigned to the punching processing station for removing the punching slug from the tool area.
  • a fourth unclaimed aspect of the invention relates to a tear-off lid produced or producible by the method according to the first aspect of the invention.
  • tear-off lids represent a significant commercial form of the invention.
  • FIGS. 7a to 7e show the processing tool of the punching processing station 14 from Fig. 6 in tool positions at different stages of advancement during the machining of a lid blank 9 according to the state of the art.
  • the tool comprises an upper tool part 1, with a cutting punch 2,3 comprising a cutting ring 2 and a cutting ring carrier 3 and with a clamping ring 4, and a lower tool part 5, with a die 6 and a die carrier 7.
  • the upper tool part 1 with the cutting punch 2, 3 is fixed and the lower tool part 5 with the die 6 working against the upper tool part 1.
  • a cover blank 9 is introduced into the tool in a horizontal direction using the conveyor device 13 (see Fig. 7b ) in such a way that the side forming the outer side of the lid during the later intended use of the lid to be produced (intended outer side of the lid) faces downwards.
  • the lower tool part 5 is then moved upwards until the cover blank 9 is clamped between the clamping ring 4 and the die carrier 7 (see Fig. 7c ).
  • the clamping ring 4 is moved upwards against the force of compression springs 29, which are arranged in the upper tool part 1, and the cutting punch 2, 3 penetrates into the die 6 (see Fig. 7d ). In doing so, it punches out a slug 16 downwards from the lid blank 9, which is discharged via a discharge opening 30 in the base frame 31 of the punching station 14 by gravity conveyance (see Figures 7d and 7e ).
  • FIGS. 8a to 8e show vertical sections transverse to the lid transport direction A through the processing tool of the punching processing station in a device according to the invention at different distances advanced tool positions in the inventive machining of a lid blank 9.
  • This device differs only in the punching processing station from the one in Fig. 6 shown device according to the state of the art.
  • the tool here also comprises a fixed upper tool part 1 and a lower tool part 5 working against the upper tool part.
  • the upper tool part 1 has a die 6 and a die carrier 7, which forms a space 32 above the die 6, into which a vacuum or magnetic conveyor belt 33 projects horizontally in such a way that it essentially completely spans the upwardly facing opening of the die 6.
  • a cover blank 9 is introduced into the tool in a horizontal direction using the conveyor device 13 (see Fig. 8b ) in such a way that the side forming the outer side of the lid during the later intended use of the lid to be produced (intended outer side of the lid) faces downwards.
  • the lower tool part 5 is then moved upwards until the cover blank 9 is clamped between the clamping ring 4 and the die 6 (see Fig. 8c ).
  • the cutting punch 2 moves out of the clamping ring 4, which rests against the die 6 with the clamped cover blank 9, and penetrates into the die 6. In doing so, it punches out a slug 16 from the cover blank 9 (see Fig. 8d ).
  • the air channels 34 in the cutting punch 2, 3 are briefly pressurized with compressed air.
  • the punching slug 16 is guided through the die 6 against the vacuum or magnetic conveyor belt 33 and then removed from the tool area in a direction B, which runs transversely to the lid conveying direction A (see Fig. 8e ).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Closing Of Containers (AREA)
  • Closures For Containers (AREA)

Claims (13)

  1. Procédé de fabrication d'un couvercle à ouverture par déchirement (27),
    dans lequel un anneau de couvercle (8) avec une ouverture de prélèvement centrale (17) entourée d'une bride de scellement (18) est formé à partir d'une ébauche de couvercle (9) par un processus d'estampage avec un outil de découpe (1, 5) comprenant une matrice (6) et un poinçon de découpe (2, 3) ;
    le bord de l'ouverture de prélèvement (17) étant formé par étirage pour former un collet (20) qui dépasse de la bride de scellement (18) sur le côté intérieur du couvercle prévu à cet effet ;
    le collet (20) étant enroulé à son extrémité libre ;
    et une feuille d'arrachage (24) étant scellée ou collée sur la bride de scellement (18) sur le côté extérieur du couvercle prévu à cet effet ;
    caractérisé en que lors de l'estampage, la matrice (6) est placée sur le côté intérieur du couvercle prévu à cet effet et que le poinçon de découpe (2, 3) est introduit dans la matrice (6) depuis le côté extérieur du couvercle prévu à cet effet, en découpant un morceau de découpe (16), et que le morceau de découpe (16) est transporté à travers la matrice (6) vers un dispositif de transport (33) qui l'évacue de la zone de l'outil.
  2. Procédé selon la revendication 1, caractérisé en ce que l'ébauche de couvercle (9) est constituée d'un matériau ferromagnétique et le dispositif de transport est une bande transporteuse magnétique (33).
  3. Procédé selon la revendication 1, caractérisé en ce que l'ébauche de couvercle (9) est constituée d'un matériau ferromagnétique ou non ferromagnétique et le dispositif de transport est une bande transporteuse à vide (33).
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'air comprimé, qui est utilisé pour transporter le morceau de découpe (16) vers le dispositif de transport (33), est acheminé à travers le poinçon de découpe (2, 3).
  5. Procédé selon la revendication 4, caractérisé en ce que l'air comprimé qui passe à travers le poinçon de découpe (2, 3) est évacué par une ou plusieurs ouvertures de sortie (35) situées sur le côté du poinçon (2, 3) tourné vers l'ébauche de couvercle (9) ou le morceau de découpe (16), en particulier par plusieurs ouvertures de sortie (35) qui sont équidistantes les unes des autres.
  6. Procédé selon la revendication 5, caractérisé en ce que l'air comprimé, qui est utilisé pour transporter le morceau de découpe (16) vers le dispositif de transport (33), est fourni par intermittence, en particulier de telle sorte que lorsque l'outil (1, 5) est ouvert, aucun air comprimé n'est fourni et que lorsque l'outil (1, 5) est fermé, de l'air comprimé est fourni, en particulier sous la forme d'une courte impulsion de pression.
  7. Procédé selon la revendication 6, caractérisé en ce que les ouvertures de sortie (35) ne sont alimentés en air comprimé qu'à partir du début de l'opération de découpage ou seulement après que l'opération de découpage a été effectuée, en particulier à partir du moment où le poinçon de découpe (2, 3) a atteint la fin de sa course.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le collet (20) est enroulé vers l'ouverture de prélèvement (17), en un C-Curl ou en un Retort-Curl.
  9. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que le collet (20) est enroulé en s'éloignant de l'ouverture de prélèvement (17), pour former un C-Curl inversé ou un Retort-Curl inversé.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que, lors du découpage, le poinçon (2, 3) est déplacé et la matrice (6) est fixe.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que, lors du découpage, le poinçon (2, 3) pénètre de bas en haut dans la matrice (6).
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'anneau de couvercle (8) est retourné entre l'enroulement du collet (20) et le scellage ou le collage de la feuille d'arrachage (24).
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que, après l'opération de découpage, l'anneau de couvercle (8) est évacué de l'outil de découpe (1, 5) dans une première direction de transport (A) et que le morceau de découpe (16) est retiré de la zone de l'outil dans une deuxième direction de transport (B) à l'aide du dispositif de transport (33), laquelle s'étend transversalement à la première direction de transport (A), en particulier perpendiculairement à la première direction de transport.
EP20807731.3A 2019-11-22 2020-11-16 Procédé et dispositif pour la fabrication de couvercles à ouverture par déchirure Active EP4041472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01478/19A CH716830A1 (de) 2019-11-22 2019-11-22 Verfahren und Vorrichtungen zur Herstellung von Aufreissdeckeln.
PCT/EP2020/082266 WO2021099267A1 (fr) 2019-11-22 2020-11-16 Procédé et dispositif pour la fabrication de couvercles à ouverture par déchirure

Publications (2)

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EP4041472A1 EP4041472A1 (fr) 2022-08-17
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CN116809759B (zh) * 2023-06-26 2025-10-03 南通思瑞机器制造有限公司 一种硅钢片高速横剪系统多工位同步冲裁装置及方法
CN117619975B (zh) * 2023-12-13 2024-10-11 江苏悦铮精密制造有限公司 一种钣金件冲压机

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KR20220102142A (ko) 2022-07-19
CN114845825B (zh) 2025-04-08
ES3029258T3 (en) 2025-06-23
EP4041472A1 (fr) 2022-08-17
CH716830A1 (de) 2021-05-31
US20220395889A1 (en) 2022-12-15
US12083577B2 (en) 2024-09-10
CN114845825A (zh) 2022-08-02
WO2021099267A1 (fr) 2021-05-27
PT4041472T (pt) 2025-05-12
KR102923358B1 (ko) 2026-02-05
TW202128505A (zh) 2021-08-01
TWI873229B (zh) 2025-02-21

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