EP0252832B1 - Method of attaching a bottom or a lid to a can body, and assembling machine for performing this method - Google Patents

Method of attaching a bottom or a lid to a can body, and assembling machine for performing this method Download PDF

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Publication number
EP0252832B1
EP0252832B1 EP87401578A EP87401578A EP0252832B1 EP 0252832 B1 EP0252832 B1 EP 0252832B1 EP 87401578 A EP87401578 A EP 87401578A EP 87401578 A EP87401578 A EP 87401578A EP 0252832 B1 EP0252832 B1 EP 0252832B1
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EP
European Patent Office
Prior art keywords
rolling
jaws
mould
lid
container
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
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EP87401578A
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German (de)
French (fr)
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EP0252832A1 (en
Inventor
Maurice Rivière
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CMB Packaging SA
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CMB Packaging SA
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Priority to AT87401578T priority Critical patent/ATE58656T1/en
Publication of EP0252832A1 publication Critical patent/EP0252832A1/en
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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
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/30—Folding the circumferential seam
    • B21D51/32—Folding the circumferential seam by rolling

Definitions

  • the invention relates to a method of assembling a bottom or cover on a box body, by internal roll; it also relates to an assembly machine capable of carrying out this process.
  • the invention overcomes these drawbacks by proposing a new method of assembling the bottom or cover on the box body, resulting in internal crimping without a protruding bead at the periphery of the corresponding end of the box.
  • the basic idea of the invention consists in using a preformed rolled edge on said bottom or cover as a bearing or reaction surface, during the internal rolling of the extreme portion of the box body.
  • the invention also relates to a machine for assembling a box body and a bottom or cover, characterized in that it comprises at least one rolling die inside which a defined rolling surface is arranged. along a predetermined perimeter, depending on the shape of the box body, this matrix comprising a socket or the like defining a first part of the rolling surface, radially inward and jaws arranged along this predetermined perimeter, that these jaws are mounted movable inside said sleeve and movable in the direction of the internal wall thereof, these jaws being shaped to define, at least partially, a second part of the rolling surface radially outward , extending said first part in a position close to said jaws and said inner wall of said sleeve, and in that said rolling die comprises te gripping means capable of retaining a bottom or cover.
  • This machine mainly consists of a drum 14 rotating around its main axis 15 for the sequencing of the different operations and here carrying four assembly assemblies 16 each comprising a rolling die 18 and a piston 19.
  • the four assemblies are regularly arranged at the periphery of the drum and angularly offset by 90 ° with respect to each other.
  • Each rolling die 18 comprises a socket 20 in the general shape of a bell, housing jaws 21, which can move radially under the action of a pusher 22 having a bearing section of varia ble axially and movable along an axis parallel to arrow A ( Figure 8).
  • the sleeve 20 has a circular lower opening while the jaws 21 are arranged regularly circumferentially inside said sleeve, the bearing section variable being here a frustoconical bearing 26. It goes without saying, however, that these shapes are dictated only by that of the crimping contour.
  • the arrangement of the jaws and the shape of the pusher may be significantly modified without departing from the scope of the invention, the necessary structural modifications being within the scope of the skilled in the art.
  • the rolling surface is distributed in the matrix 18 between the internal surface of the sleeve 20, in the vicinity of its lower opening and of the surface portions of the jaws 21. More precisely, the sleeve 20 defines a first part 20a of the surface of rolling, progressively extending radially inwards from the edge of its opening and having a suitable curved radial profile, while each jaw 21 has a curved profile surface 2la extended at its lower part by a small protruding bead 25.
  • the set of surfaces 21a thus forms a second part of the rolling surface, circumferentially discontinuous, generally oriented towards the outside and extending said first part 20a of this rolling surface when said jaws are brought closer to the internal wall of said sleeve, under the action of pusher 22.
  • Each rolling die 18 is disposed above a piston 19, the axis of symmetry of which is aligned with the axis of the pusher.
  • This piston is shaped to receive a box body 13, vertically, that is to say with an axial end of said box body resting on the upper surface of the piston. To this end, it is provided with a slight relief 31 in the form of a disc, the diameter of which corresponds to the internal diameter of the box body.
  • the piston is movable along the actuating axis of the pusher, that is to say here vertically. More specifically, the drum 14 mainly comprises two horizontal plates 33 and 34 spaced from one another and separated by a cylindrical part 36 of smaller diameter.
  • the lower plate 34 houses the pistons 19 in corresponding bores, and the lower faces of these pistons open from the lower face of the plate in order to be able to meet a lifting ramp 40, fixed, or a similar actuation means.
  • the upper plate 33 carries the dies 18 aligned with the pistons 19.
  • the cylindrical part 36 is provided with lateral recesses 37, semi-cylindrical, of shape and size suitable for receiving and driving bodies of boxes 13. These are introduced between the plates 33 and 34 by a conveying means 39 provided with a slide 39a and a broad-threaded screw 39b driving said box bodies.
  • the bottoms or covers 12 are also introduced between the plates 33 and 34, by another suitable conveying means 42, here in the form of a conveyor belt.
  • the end parts of the conveying parts 39 and 42 are arranged substantially tangentially to the drum 14, between the plates 33 and 34.
  • An auxiliary evacuation cylinder 45 provided with semi-cylindrical lateral recesses 46 is mounted rotating in the vicinity of the periphery of the cylindrical part 36. It is rotated in synchronism with the drum 14 and cooperates with a guide 48 to deposit the body of boxes provided with their bottoms or covers on a conveying means 49 conveying them to a clamping station shown in FIG. 7.
  • the latter is conventional and essentially comprises two knobs 52, 54 between which the internal rolled fastening the box body 13 and the bottom or cover 12, is capable of being crushed radially to ensure perfect sealing of the assembly.
  • the bottoms or covers 12 which are routed to the dies 18 are preformed to each have an inwardly rolled edge 12a.
  • This rolled edge can conventionally be obtained by stamping, using a tool of suitable shape, which it has not been deemed useful to represent, this operation being in itself trivial.
  • the funds or covers 12 thus preformed are deposited on the conveying means 42 so that said rolled edges 12a are oriented towards the plate 33 when the bottom or cover reaches the end of said conveying means.
  • the movement of the latter is synchronized with the rotation of the drum 14 so that a bottom or cover 12 reaches below a die 18, in the situation illustrated in FIG. 2.
  • the pusher 22 then lowers until 'that the gripping means 29 comes into contact with the central part of the bottom or cover 12.
  • the invention is applicable to the assembly of a deformable bottom or cover which is not necessarily metallic on a metal box body.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Closing Of Containers (AREA)
  • Making Paper Articles (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Adornments (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Beverage Vending Machines With Cups, And Gas Or Electricity Vending Machines (AREA)
  • Basic Packing Technique (AREA)
  • Golf Clubs (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Toys (AREA)
  • Rotational Drive Of Disk (AREA)
  • Casings For Electric Apparatus (AREA)
  • Casting Devices For Molds (AREA)
  • Stored Programmes (AREA)

Abstract

In a method of fitting a top or a bottom to the body of a can, the top or bottom is placed inside a die having a rolling surface. The top or bottom has an inwardly rolled edge defining a support surface adapted to be substantially mated with at least part of the rolling surface. An end portion of the can body is inserted between this rolling surface and this support surface. Thrust is then applied to the can body until it causes the end portion to roll around and envelop the support surface. The corresponding machine comprises at least one rolling die incorporating a bush defining a first rolling surface facing radially inwards and a plurality of jaws disposed along a perimeter corresponding to the shape of the can. The jaws are movable towards an inside wall of this bush and are shaped to define at least part of a second rolling surface which faces radially outwards. This second rolling surface is adapted to form an extension of the first rolling surface when the jaws are positioned close to the inside wall of the bush.

Description

L'invention concerne un procédé d'assemblage d'un fond ou couvercle sur un corps de boîte, par roulé-interne; elle concerne également une machine d'assemblage susceptible d'exécuter ce procédé.The invention relates to a method of assembling a bottom or cover on a box body, by internal roll; it also relates to an assembly machine capable of carrying out this process.

De nombreuses boîtes, au moins en partie métalliques, sont réalisées par un sertissage périphérique créant un bourrelet faisant circonférentiellement saillie aux extrémités de la boîte. Ce bourrelet constitue une zone particulièrement sensible à la corrosion (formation de rouille lorsque la boîte séjourne dans un lieu humide, comme par exemple une salle de bain. En outre, ils sont inesthétiques, ce qui peut constituer un inconvénient pour certains articles comme par exemple des produits de parfumerie vendus en conteneurs de type aérosol. Dans ce domaine particulier où la décoration de l'emballage est importante pour la promotion du produit, la présence du bourrelet interrompt le décor et souligne de façon inesthétique l'extrémité de l'emballage. En outre, du fait que le processus de sertissage est effectué après la décoration peinte et vernie du corps de boîte, les outils de sertissage connus endommagent ce revêtement, ce qui est l'une des causes de la vulnérabilité à la corrosion de cette zone.Many boxes, at least partly metallic, are produced by a peripheral crimping creating a bead circumferentially projecting at the ends of the box. This bead constitutes an area particularly susceptible to corrosion (formation of rust when the box stays in a humid place, such as a bathroom. In addition, they are unsightly, which can be a disadvantage for certain items such as for example perfume products sold in aerosol type containers In this particular area where the decoration of the packaging is important for the promotion of the product, the presence of the bead interrupts the decoration and unaesthetically emphasizes the end of the packaging. In addition, since the crimping process is carried out after the painted and varnished decoration of the box body, known crimping tools damage this coating, which is one of the causes of the vulnerability to corrosion of this area.

Enfin, la présence du bourrelet externe empêche l'empilage de tels emballages métalliques, ce qui pose des problèmes pour le stockage et la manutention.Finally, the presence of the external bead prevents the stacking of such metal packaging, which poses problems for storage and handling.

Des tentatives ont été effectuées pour réaliser un sertissage interne, non saillant. comme en témoigne, par exemple, le brevet américain US-A 3 452 897. Cependant, à ce jour, ce type de sertissage ne semble pas exploité industriellement. En outre, sa mise en oeuvre nécessite une soudure avant les opérations aboutissant à l'élaboration dudit sertissage interne, ce qui augmente sensiblement les coûts de fabrication. Par ailleurs, le brevet américain US-A 1 679 629 et le brevet britannique US-A 330 690 décrivent un mode d'assemblage d'un fond ou couvercle à un corps de boîte, Le fond ou couvercle présente un bord relevé et il est posé sur un rétreint du corps de boîte avant roulage simultané des parties en contact. Ce procédé ne permet pas d'atteindre de grandes cadences de production.Attempts have been made to achieve internal crimping, not protruding. as evidenced, for example, American patent US-A 3,452,897. However, to date, this type of crimping does not seem to be used industrially. In addition, its implementation requires welding before the operations leading to the development of said internal crimping, which significantly increases the manufacturing costs. Furthermore, American patent US-A 1 679 629 and British patent US-A 330 690 describe a method of assembling a bottom or cover to a box body, The bottom or cover has a raised edge and it is placed on a neck of the box body before simultaneous rolling of the parts in contact. This process does not allow high production rates to be reached.

L'invention permet de résoudre ces inconvénients en proposant un nouveau procédé d'assemblage du fond ou couvercle sur le corps de boîte, aboutissant à un sertissage interne sans bourrelet saillant à la périphérie de l'extrémité correspondante de la boîte. L'idée de base de l'invention consiste à utiliser un bord roulé préformé sur ledit fond ou couvercle en tant que surface d'appui ou de réaction, pendant le roulage interne de la portion extrême du corps de boîte.The invention overcomes these drawbacks by proposing a new method of assembling the bottom or cover on the box body, resulting in internal crimping without a protruding bead at the periphery of the corresponding end of the box. The basic idea of the invention consists in using a preformed rolled edge on said bottom or cover as a bearing or reaction surface, during the internal rolling of the extreme portion of the box body.

Plus précisément, l'invention concerne donc un procédé d'assemblage d'un fond ou couvercle à un corps de boîte, caractérisé en ce qu'il consiste:

  • - à placer dans une matrice munie d'une surface de roulage un fond ou couvercle à bord roulé vers l'intérieur, de façon que celui-ci définisse une surface d'appui épousant sensiblement au moins une partie de ladite surface de roulage;
  • - à maintenir ce fond ou couvercle sensiblement sans contrainte dans ladite matrice; et
  • - à engager une portion extrême dudit corps de boîte entre ladite surface de roulage et ladite surface d'appui et à repousser ledit corps de boîte jusqu'à provoquer le roulage de cette portion extrême enveloppant ladite surface d'appui.
More specifically, the invention therefore relates to a method of assembling a bottom or cover to a box body, characterized in that it consists:
  • - placing in a matrix provided with a rolling surface a bottom or cover with an inwardly rolled edge, so that the latter defines a bearing surface conforming substantially to at least part of said rolling surface;
  • - Maintain this bottom or cover substantially without constraint in said matrix; and
  • - Engaging an end portion of said box body between said rolling surface and said support surface and pushing said box body until the rolling of this end portion enveloping said support surface.

L'invention concerne également une machine d'assemblage d'un corps de boîte et d'un fond ou couvercle, caractérisée en ce qu'elle comporte au moins une matrice de roulage à l'intérieur de laquelle est agencée une surface de roulage définie le long d'un périmètre prédéterminé, dépendant de la forme du corps de boîte, cette matrice comprenant une douille ou analogue définissant une première partie de surface de roulage, radialement vers l'intérieur et des mâchoires agencées le long de ce périmètre prédéterminé, en ce que ces mâchoires sont montées mobiles à l'intérieur de ladite douille et déplaçables en direction de la paroi interne de celle-ci, ces mâchoires étant conformées pour définir, au moins partiellement, une seconde partie de surface de roulage radialement vers l'extérieur, prolongeant ladite première partie en position rapprochée desdites mâchoires et de ladite paroi interne de ladite douille, et en ce que ladite matrice de roulage comporte des moyens de préhension susceptibles de retenir un fond ou couvercle.The invention also relates to a machine for assembling a box body and a bottom or cover, characterized in that it comprises at least one rolling die inside which a defined rolling surface is arranged. along a predetermined perimeter, depending on the shape of the box body, this matrix comprising a socket or the like defining a first part of the rolling surface, radially inward and jaws arranged along this predetermined perimeter, that these jaws are mounted movable inside said sleeve and movable in the direction of the internal wall thereof, these jaws being shaped to define, at least partially, a second part of the rolling surface radially outward , extending said first part in a position close to said jaws and said inner wall of said sleeve, and in that said rolling die comprises te gripping means capable of retaining a bottom or cover.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en référence aux dessins schématiques annexés dans lesquels:

  • - la figure 1 est une vue schématique en perspective illustrant une machine d'essemblage d'un fond ou couvercle, sur un corps de boîte, réalisant les opérations conformes à l'invention;
  • - les figures 2 à 6 sont des vues de détail représentées partiellement en coupe de certaines parties de la machine de la figure 1 et illustrant la succession des opérations réalisées sur ladite machine;
  • - la figure 7 illustre la dernière étape du procédé effectuée à un autre poste de travail indépendant de la machine de la figure 1 ; et
  • - la figure 8 est une vue de détail et à plus grande échelle illustrant plus particulièrement l'opération de roulage interne correspondant à la figure 5.
The invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows, given solely by way of example, and made with reference to the appended schematic drawings in which:
  • - Figure 1 is a schematic perspective view illustrating a machine for assembling a bottom or cover, on a box body, performing the operations according to the invention;
  • - Figures 2 to 6 are detail views partially shown in section of certain parts of the machine of Figure 1 and illustrating the succession of operations performed on said machine;
  • - Figure 7 illustrates the last step of the process performed at another workstation independent of the machine of Figure 1; and
  • FIG. 8 is a detail view on a larger scale illustrating more particularly the internal rolling operation corresponding to FIG. 5.

En se référant aux dessins, on a représenté une machine 11 d'assemblage de fonds ou couvercles 12 à des corps de boîte 13, tubulaires, respectifs. Cette machine se compose principalement d'un tambour 14 tournant autour de son axe principal 15 pour le sé- quencement des différentes opérations et portant ici quatre ensembles d'assemblage 16 comportant chacun une matrice de roulage 18 et un piston 19. Les quatre ensembles d'assemblages sont régulièrement disposés à la périphérie du tambour et angu- lairement décalés de 90° les uns par rapport aux autres. Chaque matrice de roulage 18 comporte une douille 20 en forme générale de cloche, abritant des mâchoires 21, mobiles radialement sous l'action d'un poussoir 22 présentant une portée à section variable axialement et mobile selon un axe parallèle à la flèche A (figure 8). Dans l'exemple représenté, concernant l'assemblage de fonds circulaires et de corps de boîte cylindriques, la douille 20 présente une ouverture inférieure circulaire tandis que les mâchoires 21 sont agencées régulièrement circonférentiellement à l'intérieur de ladite douille, la portée à section variable étant ici une portée tronconique 26. Il va de soi cependant, que ces formes ne sont dictées que par celle du contour de sertissage. En fonction de la forme de la boîte, la forme de la douille, l'agencement des mâchoires et la forme du poussoir pourront être notablement modifiés sans sortir du cadre de l'invention, les modifications de structure nécessaires étant à la portée de l'homme du métier.Referring to the drawings, there is shown a machine 11 for assembling bottoms or covers 12 to box bodies 13, tubular, respectively. This machine mainly consists of a drum 14 rotating around its main axis 15 for the sequencing of the different operations and here carrying four assembly assemblies 16 each comprising a rolling die 18 and a piston 19. The four assemblies d The assemblies are regularly arranged at the periphery of the drum and angularly offset by 90 ° with respect to each other. Each rolling die 18 comprises a socket 20 in the general shape of a bell, housing jaws 21, which can move radially under the action of a pusher 22 having a bearing section of varia ble axially and movable along an axis parallel to arrow A (Figure 8). In the example shown, concerning the assembly of circular bottoms and cylindrical box bodies, the sleeve 20 has a circular lower opening while the jaws 21 are arranged regularly circumferentially inside said sleeve, the bearing section variable being here a frustoconical bearing 26. It goes without saying, however, that these shapes are dictated only by that of the crimping contour. Depending on the shape of the box, the shape of the socket, the arrangement of the jaws and the shape of the pusher may be significantly modified without departing from the scope of the invention, the necessary structural modifications being within the scope of the skilled in the art.

La surface de roulage se trouve répartie dans la matrice 18 entre la surface interne de la douille 20, au voisinage de son ouverture inférieure et des portions de surface des mâchoires 21. Plus précisément, la douille 20 définit une première partie 20a de la surface de roulage, s'étendant progressivement radialement vers l'intérieur à partir du bord de son ouverture et présentant un profil radial courbe adapté, tandis que chaque mâchoire 21 présente une surface à profil courbe 2la prolongée à sa partie inférieure par un petit bourrelet saillant 25. L'ensemble des surfaces 21a forme ainsi une seconde partie de la surface de roulage, discontinue circonférentiellement, globalement orientée vers l'extérieur et prolongeant ladite première partie 20a de cette surface de roulage lorsque lesdites mâchoires sont rapprochées de la paroi interne de ladite douille, sous l'action du poussoir 22. Cette situation est clairement visible sur la figure 8. On voit que les mâchoires sont repoussées radialement vers l'extérieur lorsque le poussoir est déplacé axialement dans le sens de la flèche A, c'est-à-dire lorsque sa portée tronconique 26 repousse l'ensemble des mâchoires radialement vers l'extérieur, en prenant appui sur leurs faces arrière. Un anneau élastique 27 en matériau élastomère est disposé dans un logement défini par des portions de gorge pratiquées à l'extérieur des mâchoires, de façon à solliciter ces dernières dans la sens d'un retrait radial, lorsque le poussoir est actionné en sens inverse de celui indiqué par la flèche A. D'autre part, la partie inférieure du poussoir porte un moyen de préhension 29, ici sous forme d'une ventouse, susceptible de retenir un fond ou couvercle 12. La fiabilité de la préhension par la ventouse est améliorée grâce à un moyen d'aspiration, non représentée, séquentielle- ment raccordé à un conduit 30 traversant axialement le poussoir 18 et débouchant au centre de ladite ventouse 29.The rolling surface is distributed in the matrix 18 between the internal surface of the sleeve 20, in the vicinity of its lower opening and of the surface portions of the jaws 21. More precisely, the sleeve 20 defines a first part 20a of the surface of rolling, progressively extending radially inwards from the edge of its opening and having a suitable curved radial profile, while each jaw 21 has a curved profile surface 2la extended at its lower part by a small protruding bead 25. The set of surfaces 21a thus forms a second part of the rolling surface, circumferentially discontinuous, generally oriented towards the outside and extending said first part 20a of this rolling surface when said jaws are brought closer to the internal wall of said sleeve, under the action of pusher 22. This situation is clearly visible in Figure 8. We see that the jaws es are pushed radially outward when the pusher is moved axially in the direction of arrow A, that is to say when its frustoconical bearing 26 pushes all of the jaws radially outward, bearing on their back sides. An elastic ring 27 of elastomeric material is disposed in a housing defined by groove portions formed outside the jaws, so as to urge the latter in the direction of radial withdrawal, when the pusher is actuated in the opposite direction from that indicated by arrow A. On the other hand, the lower part of the pusher carries a gripping means 29, here in the form of a suction cup, capable of retaining a bottom or cover 12. The reliability of the gripping by the suction cup is improved by means of a suction means, not shown, sequentially connected to a conduit 30 axially passing through the pusher 18 and emerging at the center of said suction cup 29.

Chaque matrice de roulage 18 est disposée au-dessus d'un piston 19, dont l'axe de symétrie est aligné avec l'axe du poussoir. Ce piston est conformé pour recevoir un corps de boîte 13, verticalement, c'est-à-dire avec une extrémité axiale dudit corps de boîte reposant sur la surface supérieure du piston. A cet effet, celle-ci est munie d'un léger relief 31 en forme de disque dont le diamètre correspond au diamètre interne du corps de boîte. Le piston est déplaçable selon l'axe d'actionnement du poussoir, c'est-à-dire ici verticalement. Plus précisément, le tambour 14 comporte principalement deux plateaux horizontaux 33 et 34 espacés l'un de l'autre et séparés par une partie cylindrique 36 de plus faible diamètre. Le plateau inférieur 34 abrite les pistons 19 dans des alésages correspondants, et les faces inférieures de ces pistons débouchent de la face inférieure du plateau pour pouvoir rencontrer une rampe de levage 40, fixe, ou un moyen d'actionnement analogue. Le plateau supérieur 33 porte les matrices 18 alignées avec les pistons 19. La partie cylindrique 36 est munie de creusures latérales 37, semi-cylindriques, de forme et dimension propres à accueillir et entraîner des corps de boîtes 13. Ceux- ci sont introduits entre les plateaux 33 et 34 par un moyen de convoyage 39 muni d'une glissière 39a et d'une vis à large filet 39b entraînant lesdits corps de boîtes. Les fonds ou couvercles 12 sont aussi introduits entre les plateaux 33 et 34, par un autre moyen de convoyage 42 adapté, ici sous forme d'une bande transporteuse. Les parties extrêmes des parties de convoyage 39 et 42 sont agencées sensiblement tangentiellement au tambour 14, entre les plateaux 33 et 34. Un cylindre auxiliaire d'évacuation 45 muni de creusures latérales semi-cylindriques 46 est monté tournant au voisinage de la périphérie de la partie cylindrique 36. Il est entraîné en rotation en synchronisme avec le tambour 14 et coopère avec un guide 48 pour déposer les corps de boîtes munis de leurs fonds ou couvercles sur un moyen de convoyage 49 les acheminant vers un poste de serrage représenté à la figure 7. Ce dernier est classique et comporte essentiellement deux molettes 52, 54 entre lesquelles le roulé interne solidarisant le corps de boîte 13 et le fond ou couvercle 12, est susceptible d'être écrasé radialement pour assurer une parfaite étanchéité de l'assemblage.Each rolling die 18 is disposed above a piston 19, the axis of symmetry of which is aligned with the axis of the pusher. This piston is shaped to receive a box body 13, vertically, that is to say with an axial end of said box body resting on the upper surface of the piston. To this end, it is provided with a slight relief 31 in the form of a disc, the diameter of which corresponds to the internal diameter of the box body. The piston is movable along the actuating axis of the pusher, that is to say here vertically. More specifically, the drum 14 mainly comprises two horizontal plates 33 and 34 spaced from one another and separated by a cylindrical part 36 of smaller diameter. The lower plate 34 houses the pistons 19 in corresponding bores, and the lower faces of these pistons open from the lower face of the plate in order to be able to meet a lifting ramp 40, fixed, or a similar actuation means. The upper plate 33 carries the dies 18 aligned with the pistons 19. The cylindrical part 36 is provided with lateral recesses 37, semi-cylindrical, of shape and size suitable for receiving and driving bodies of boxes 13. These are introduced between the plates 33 and 34 by a conveying means 39 provided with a slide 39a and a broad-threaded screw 39b driving said box bodies. The bottoms or covers 12 are also introduced between the plates 33 and 34, by another suitable conveying means 42, here in the form of a conveyor belt. The end parts of the conveying parts 39 and 42 are arranged substantially tangentially to the drum 14, between the plates 33 and 34. An auxiliary evacuation cylinder 45 provided with semi-cylindrical lateral recesses 46 is mounted rotating in the vicinity of the periphery of the cylindrical part 36. It is rotated in synchronism with the drum 14 and cooperates with a guide 48 to deposit the body of boxes provided with their bottoms or covers on a conveying means 49 conveying them to a clamping station shown in FIG. 7. The latter is conventional and essentially comprises two knobs 52, 54 between which the internal rolled fastening the box body 13 and the bottom or cover 12, is capable of being crushed radially to ensure perfect sealing of the assembly.

On va maintenant décrire la mise en oeuvre du procédé de l'invention, plus particulièrement illustré aux figures 2 à 6.We will now describe the implementation of the method of the invention, more particularly illustrated in FIGS. 2 to 6.

Il convient de noter que les fonds ou couvercles 12 qui sont acheminés vers les matrices 18 sont préformés pour comporter, chacun, un bord roulé vers l'intérieur 12a. Ce bord roulé peut être obtenu classiquement par emboutissage, au moyen d'un outil de forme adaptée, qu'il n'a pas été jugé utile de représenter, cette opération étant en soi banale. Les fonds ou couvercles 12 ainsi préformés sont déposés sur le moyen de convoyage 42 de façon que lesdits bords roulés 12a soient orientés vers le plateau 33 lorsque les fond ou couvercle parviennent à l'extrémité dudit moyen de convoyage. Le mouvement de celui-ci est synchronisé à la rotation du tambour 14 de façon qu'un fond ou couvercle 12 parvienne en-dessous d'une matrice 18, dans la situation illustrée à la figure 2. Le poussoir 22 s'abaisse alors jusqu'à ce que le moyen de préhension 29 entre en contact avec la partie centrale du fond ou couvercle 12. C'est la situation illustrée à la figure 3. A cette phase du processus, les mâchoires 21 sont en retrait par rapport à la surface interne de la douille 20, puisque la portée tronconique 26 n'est pas en contact avec lesdites mâchoires. Lorsque le fond ou couvercle 12 adhère à la ventouse, le poussoir 22 est actionné dans le sens de la flèche A, ce qui a pour double conséquence de placer le bord roulé 12a en regard de ladite première partie 20a de la surface de roulage, puis de provoquer le déplacement radiale des mâchoires 21 pour emprisonner complètement le bord roulé 12a dans l'espace annulaire défini entre les parties 20a et 21a de ladite surface de roulage. Il est à noter qu'à partir de ce moment, le fond ou couvercle 12 est prisonnier par son bord roulé dans la matrice 18, mais qu'il n'est, en pratique, soumis à aucune contrainite de serrage entre la surface interne de la douille 20 et les mâchoires 21. Le tambour 14 poursuit alors sa rotation jusqu'à l'extrémité du moyen de convoyage 39 où un corps de boîte 13 est positionné sur le piston 19 correspondant. C'est la situation illustrée à la figure 4. La rotation du tambour se poursuit jusqu'à ce que le piston 19 soit actionné vers le haut au moment de son passage sur la rampe 20. C'est la situation illustrée aux figures 5 et 8 qui a pour conséquence d'engager la portion extrême supérieure du corps de boîte entre la surface de roulage 20a, 21a et une surface d'appui définie par le bord roulé 12a du fond ou couvercle lui-même. Ce mouvement a pour conséquence de repousser axialement le corps de boîte 13 jusqu'à provoquer le roulage de la portion extrême de celui-ci engagée dans la matrice, ce roulage enveloppant la surface d'appui définie par le bord roulé 12a. A partir de ce moment, le fond ou couvercle 12 et le corps de boîte 13 sont solidarisés l'un à l'autre. La ventouse 29 est relachée et le piston 19, dépassant la rampe 40, redescend dans son logement. C'est la situation de la figure 6. Puis, l'ensemble, poursuivant sa rotation parvient jusqu'au moyen de convoyage 49 qui l'achemine au poste de serrage illustré à la figure 7. On opère alors un serrage radial des deux portions roulées du corps de boîte et du fond ou couvercle, jusqu'à écraser lesdites portions roulées entre les deux molettes 52 et 54. Cette dernière opération réalise un sertissage parfaitement étanche, sans soudure préalable.It should be noted that the bottoms or covers 12 which are routed to the dies 18 are preformed to each have an inwardly rolled edge 12a. This rolled edge can conventionally be obtained by stamping, using a tool of suitable shape, which it has not been deemed useful to represent, this operation being in itself trivial. The funds or covers 12 thus preformed are deposited on the conveying means 42 so that said rolled edges 12a are oriented towards the plate 33 when the bottom or cover reaches the end of said conveying means. The movement of the latter is synchronized with the rotation of the drum 14 so that a bottom or cover 12 reaches below a die 18, in the situation illustrated in FIG. 2. The pusher 22 then lowers until 'that the gripping means 29 comes into contact with the central part of the bottom or cover 12. This is the situation illustrated in FIG. 3. At this phase of the process, the jaws 21 are set back relative to the surface internal of the sleeve 20, since the frustoconical bearing 26 is not in contact with said jaws. When the bottom or cover 12 adheres to the suction cup, the pusher 22 is actuated in the direction of arrow A, this which has the double consequence of placing the rolled edge 12a opposite said first part 20a of the rolling surface, then causing the radial displacement of the jaws 21 to completely trap the rolled edge 12a in the annular space defined between the parts 20a and 21a of said rolling surface. It should be noted that from this moment, the bottom or cover 12 is trapped by its rolled edge in the die 18, but that it is not, in practice, subjected to any tightening constrainite between the internal surface of the sleeve 20 and the jaws 21. The drum 14 then continues its rotation to the end of the conveying means 39 where a box body 13 is positioned on the corresponding piston 19. This is the situation illustrated in FIG. 4. The rotation of the drum continues until the piston 19 is actuated upwards when it passes over the ramp 20. This is the situation illustrated in FIGS. 5 and 8 which results in engaging the upper end portion of the can body between the rolling surface 20a, 21a and a bearing surface defined by the rolled edge 12a of the bottom or cover itself. The effect of this movement is to push the box body 13 axially until the end portion of the latter engaged in the die is rolled, this rolling enveloping the bearing surface defined by the rolled edge 12a. From this moment, the bottom or cover 12 and the box body 13 are secured to one another. The suction cup 29 is released and the piston 19, beyond the ramp 40, descends into its housing. This is the situation in FIG. 6. Then, the assembly, continuing its rotation, reaches the conveying means 49 which routes it to the clamping station illustrated in FIG. 7. A radial clamping of the two portions is then carried out. rolled of the box body and the bottom or cover, until crushing said rolled portions between the two knobs 52 and 54. This last operation achieves a perfectly sealed crimping, without prior welding.

L'invention est applicable à l'assemblage d'un fond ou couvercle déformable non obligatoirement métallique sur un corps de boîte métallique.The invention is applicable to the assembly of a deformable bottom or cover which is not necessarily metallic on a metal box body.

Claims (8)

1. A method of assembling a bottom or lid on a body of a container which consists of:
- placing a bottom or lid (12) having an inwardly rolled edge (12a) in a mould (18) equipped with a surface for rolling (20a, 21 a) in such a way that the rolled edge defines a bearing surface substantially matching at least part of the said surface for rolling;
- holding the bottom or lid in the said mould substantially without constraint; and
- engaging an end portion of the said body of the container (13) between the said surface for rolling (20a, 21 a) and the said bearing surface and forcing back the said body of the container until rolling of this end portion occurs enclosing the said bearing surface.
2. A method according to Claim 1, characterized in addition by a radial squeezing (52, 54) of the two rolled portions of the said body and the said bottom or lid until the said rolled portions are crushed together.
3. A method according to Claim 2, characterized in that the squeezing is performed between two rotating crimping wheels (52, 54).
4. A machine for assembling a body of a container and a bottom or lid comprising at least one mould for rolling (18) inside which is arranged a surface for rolling defined along a predetermined perimeter, depending on the shape of the body of the container, this mould comprising a socket (20) or the like defining a radially inwardly facing first part (20a) of the surface for rolling and jaws (21) arranged along the predetermined perimeter, these jaws being mounted inside the said socket so that they can be moved towards the internal wall of the latter, and these jaws being shaped to define, at least partially, a radially outwardly facing second part (21 a) of the surface for rolling, which forms an extension of the said first part when in the position in which the said jaws and the said internal wall of the said socket are brought together, and the said mould for rolling comprises holding means (29) capable of holding a bottom or lid.
5. An assembling machine according to Claim 4, characterized in that the said mould for rolling comprises a pushing device (22), mounted axially movable inside the said socket, and comprising a bearing surface having an axially varying cross-section (26), the said bearing surface cooperating with the said jaws in order to push them towards the internal wall of the said socket and in that the lower part of this pushing device carries a holding means (29) which is capable of holding an aforementioned bottom or lid.
6. An assembling machine according to Claim 5, characterized in that the said holding means (29) is a suction device or the like.
7. An assembling machine according to one of Claims 5 or 6, characterized in that the said mould for rolling (18) is located above a piston (19) shaped to receive a body of a container (13) and movable along the operating axis of the said pushing device (22).
8. An assembling machine according to Claim 7, characterized in that it comprises at least one, and preferably several, mould for rolling-piston unit or units (18-19) installed at the periphery of a drum (14) and in that a ramp (40) for lifting the said piston (19), or a similarly acting means, is situated at a predetermined location near the periphery of the said drum, along the path of movement of the said piston.
EP87401578A 1986-07-08 1987-07-06 Method of attaching a bottom or a lid to a can body, and assembling machine for performing this method Expired - Lifetime EP0252832B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401578T ATE58656T1 (en) 1986-07-08 1987-07-06 METHOD OF ASSEMBLING A BASE OR LID TO A CAN BODY AND ASSEMBLY MACHINE FOR CARRYING OUT THE METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8609897 1986-07-08
FR8609897A FR2601269B1 (en) 1986-07-08 1986-07-08 METHOD FOR ASSEMBLING A BOTTOM OR LID TO A BOX BODY AND ASSEMBLY MACHINE FOR CARRYING OUT THE METHOD.

Publications (2)

Publication Number Publication Date
EP0252832A1 EP0252832A1 (en) 1988-01-13
EP0252832B1 true EP0252832B1 (en) 1990-11-28

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EP87401578A Expired - Lifetime EP0252832B1 (en) 1986-07-08 1987-07-06 Method of attaching a bottom or a lid to a can body, and assembling machine for performing this method

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US (1) US4820100A (en)
EP (1) EP0252832B1 (en)
JP (1) JPS6380935A (en)
AT (1) ATE58656T1 (en)
CA (1) CA1336661C (en)
DE (1) DE3766435D1 (en)
DK (1) DK168085B1 (en)
ES (1) ES2019955B3 (en)
FR (1) FR2601269B1 (en)
GR (1) GR3001393T3 (en)
IE (1) IE59935B1 (en)
PT (1) PT85282B (en)

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GB9822625D0 (en) * 1998-10-17 1998-12-09 Rover Group Panel assembly
US20050178818A1 (en) * 1998-12-25 2005-08-18 Kiyokazu Kobayashi Method of joining steel members, method of processing joined surface of steel member and reinforcing member
KR100382436B1 (en) * 1998-12-25 2003-05-12 고바야시 기요카즈 Method of joining steel products, method of processing junction surface of steel products, and reinforcing member
WO2002042196A2 (en) * 2000-11-22 2002-05-30 Raptor Consulting, Inc. Container forming method and product
US6419110B1 (en) 2001-07-03 2002-07-16 Container Development, Ltd. Double-seamed can end and method for forming
US20030021920A1 (en) * 2002-08-06 2003-01-30 Williamson James T. Container forming method and product
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JP5384897B2 (en) * 2007-12-19 2014-01-08 株式会社田中産業 Processing device, method of fixing lid to container, metal sealed container, and sealed power storage device
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Also Published As

Publication number Publication date
PT85282A (en) 1988-07-29
DK349987A (en) 1988-01-09
JPH0464763B2 (en) 1992-10-16
PT85282B (en) 1993-07-30
US4820100A (en) 1989-04-11
DK168085B1 (en) 1994-02-07
CA1336661C (en) 1995-08-15
IE871823L (en) 1988-01-08
FR2601269B1 (en) 1993-02-19
GR3001393T3 (en) 1992-09-11
IE59935B1 (en) 1994-05-04
ES2019955B3 (en) 1991-07-16
JPS6380935A (en) 1988-04-11
EP0252832A1 (en) 1988-01-13
DK349987D0 (en) 1987-07-07
FR2601269A1 (en) 1988-01-15
DE3766435D1 (en) 1991-01-10
ATE58656T1 (en) 1990-12-15

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