EP0448436A1 - Method of making hollow objects and metal containers of truncated pyramidal form and hollow objects and metal containers of truncated pyramidal form - Google Patents

Method of making hollow objects and metal containers of truncated pyramidal form and hollow objects and metal containers of truncated pyramidal form Download PDF

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Publication number
EP0448436A1
EP0448436A1 EP91400587A EP91400587A EP0448436A1 EP 0448436 A1 EP0448436 A1 EP 0448436A1 EP 91400587 A EP91400587 A EP 91400587A EP 91400587 A EP91400587 A EP 91400587A EP 0448436 A1 EP0448436 A1 EP 0448436A1
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EP
European Patent Office
Prior art keywords
shape
rod
truncopyramidal
hollow
concavity
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.)
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Application number
EP91400587A
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German (de)
French (fr)
Inventor
Claude Corti
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.)
Ferembal SA
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Ferembal SA
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Publication date
Application filed by Ferembal SA filed Critical Ferembal SA
Publication of EP0448436A1 publication Critical patent/EP0448436A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape
    • B65D7/06—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by shape of polygonal cross-section, e.g. tins, boxes
    • 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
    • B21D51/2646—Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged

Definitions

  • the invention relates to metal containers of truncopyramidal shape, consisting of a hollow element and a bottom crimped on this element, in particular intended to contain paint.
  • the invention relates more particularly to a method of manufacturing a hollow metal element and a metal container, of truncopyramidal shape. It also relates to a hollow metal element as well as a metal container, of tronco-pyramidal shape.
  • the method can consist in cutting, from a metal sheet, metal sides of rectangular shape.
  • the cutting is carried out using two circular shears. This cutting process is the most economical because it optimizes both the use of the raw material (thin metal sheet) by reducing cutting waste as much as possible, the cost of cutting labor in optimizing the rates and the investment cost of the machine used.
  • the method then consists in welding the cylinder obtained by bringing two opposite sides of the rectangular flank, with a slight overlap and parallel to the axis of the cylinder thus formed.
  • at least one end of the cylinder is planked.
  • the planking is carried out by flaring so as to obtain a regular fallen edge.
  • This planking step makes it possible to prepare the crimping of the bottom which is carried out in a last step and makes it possible to obtain the tightness of this crimp.
  • a molding of the body of the container can optionally be produced.
  • the method consists in cutting a sidewall of rectangular shape and in carrying out its welding so as to obtain a cylindrical body.
  • the body is then formed by permanently deforming the cylindrical body, using an expansion tool acting along the axis of the cylinder and mounted on a suitable machine. This forming makes it possible to obtain a body of conical shape.
  • the stage of forming the cylindrical body makes it possible to deform the cylindrical body so as to give it a troncopyramidal shape but also causes a camber or a bending of the metal, in the plane of each of the four faces of the body in the form of a trunk of pyramid with two ends of it. This process therefore does not allow a regular edge to be obtained on the ends of the body. This entails risks of improper crimping of the bottom of the container and therefore risk of leakage when the container is filled.
  • this process has the advantage of making it possible to directly obtain a body of truncopyramidal shape having a regular edge on which a base can be crimped after the planking step.
  • this method has the disadvantage of causing improper use of the raw material. Indeed, cutting into a metal sheet metal flanks having a complex shape results in relatively large waste.
  • the object of the invention is to overcome these drawbacks by proposing a method of manufacturing hollow elements or containers of truncopyramidal shape, making it possible to optimize the use of the raw material as well as the number of operations required, in order to limit the cost price of this hollow element or of this container.
  • the end of said body of truncopyramidal shape near which said rod is made corresponds to that of the smallest cross section.
  • the invention also relates to a hollow metallic element of truncopyramidal shape consisting of a welded sheet of metal and comprising on its periphery and near one end, a rod whose concavity is directed towards the outside of said element, the depth of said concavity varying continuously between a maximum value on the short sides of said element and a minimum value substantially at the center of the long sides of said element.
  • the end of the element near which said rod is located is that having the smallest cross section.
  • the invention also relates to a metal container of truncopyramidal shape comprising a hollow metal element as just described and a bottom set on the end of this element comprising said rod.
  • the method according to the invention making it possible to obtain a hollow element of truncopyramidal shape, firstly consists in cutting, from a metal sheet, metal sides of rectangular shape.
  • the dimensions of the sidewalls are chosen as a function of those of the truncopyramidal element which it is desired to obtain.
  • the cutting is preferably carried out using two circular shears. This cutting process is, in the most economical.
  • the cylinder obtained is then welded by bringing two opposite sides of the rectangular flank, parallel to the axis of the cylinder thus formed.
  • the two opposite sides of the rectangular flank which are brought together have a slight overlap.
  • the cylindrical body obtained is then formed, by deforming it permanently using an expansion tool acting along the axis of the cylinder and mounted on a suitable machine.
  • the expansion tool is chosen so that the forming step makes it possible to obtain a body of truncopyramidal shape.
  • the truncopyramidal body obtained does not have a regular edge at any of its ends. Indeed, the forming step causes the metal to bend in the plane of each of the four faces of the body, at the two ends of the latter.
  • the method then consists in making a rod on the periphery of the body of truncopyramidal shape and near one of the two ends of this body.
  • the rod 13 is formed along a cross section of the element 12 of truncopyramidal shape.
  • the concavity of this rod is directed towards the outside of the element.
  • the depth of this concavity will be fixed as a function of the camber obtained during the operation of forming the body of cylindrical shape. To compensate for this camber, the depth of the concavity is not constant over the entire periphery of the element 12. It varies continuously between a maximum value on each of the two short sides 14, 15 of the truncopyramidal element up to a minimum value substantially in the middle of each of the two long sides 16, 17 of this element 12. The maximum and minimum values of the depth of the concavity as well as its variation will be determined for each element of given form.
  • the reference 1 designates a body of truncopyramidal shape, as obtained after the cutting, welding and forming operations.
  • the axis of this body is designated by reference 10.
  • the tool allowing the formation of the anti-cambering rod is designated by the reference 2. It comprises a first part 3 intended to be placed around the body 1 and a second part 4 intended to be placed opposite the first , inside the body 1.
  • these first and second parts 3 and 4 are made of four separate elements. The elements are mobile and are operated by appropriate means, known to those skilled in the art and not shown in the figure.
  • Each of the elements of the first part 3 has a substantially L-shaped shape corresponding to a quarter of the body 1, defined by its two axes of symmetry.
  • the height of each element is at least a fraction of that of the body 1.
  • the shape of the inner surface 6 of each element corresponds substantially to that of the outer surface of the body 1, so as to be able to match the shape of the latter. It is the same for the external surface 7 of each element of the second part 4 opposite the internal face of the body 1.
  • Each element of the first part 3 has, on its inner surface 6 a relief imprint 8, corresponding to the shape of the rod that it is desired to produce.
  • Each element of the second part 4 has, on its outer surface 7, a hollow imprint 9 corresponding to the relief imprint 8 of each element of the first part 3.
  • This tool is as follows.
  • the four symmetrical parts of the second part 4 are placed inside the box body, so as to place the hollow imprint 9 at the place where it is desired to make the rod.
  • Each element of the first part 3 is also placed around the body 1, so that the raised imprints 8 are located substantially opposite a hollow imprint 9 of an element of the corresponding second part 4.
  • Each element of the first part 3 is then pressed against the body 1, according to the arrows F1.
  • the body 1 is stamped by the imprint of the anti-cambering rod, corresponding to the imprints in relief 8 and in hollow 9. This operation stamping is more particularly illustrated by FIG. 3.
  • Figures 1 to 3 also illustrate the planking step which can then be carried out.
  • the tool allowing the formation of the anti-camber ring is supplemented by a third part 5.
  • This third part 5 also consists of four symmetrical and mobile elements. These four elements are operated by any appropriate means known to those skilled in the art.
  • the third part has a substantially parallelepiped shape whose cross section has a surface greater than that of the section located at the end of the box body near which the rod was formed. It also has over its entire periphery and over part of its height a recess 11.
  • Each element of this third part 5 is intended to be placed at least partially inside the body 1, as shown in Figure 1.
  • the third part 5 is positioned so that the end, here lower, of the body 1, near which the rod will be or is made, rests on the horizontal part of the recess 11. After the formation of the rod, we act on each element of the third part 5 so as to move them in the direction and direction indicated by the arrow F3. As illustrated in FIG. 3, this operation makes it possible to flare, towards the outside of the body 1, the lower end of the latter and to make the planking of the lower end of this edge.
  • the method of manufacturing the metal container of truncopyramidal shape according to the invention consists in producing an element of troncopyramidal shape according to the process which has just been described, this element having dimensions corresponding to those of the container that it is desired to obtain.
  • a flanging planking is then carried out at the end of the element close to which the anti-cambering rod has been produced.
  • the planking is carried out by any suitable means, known to those skilled in the art, which will not be described here in detail.
  • the planking can in particular be carried out by means of the tool described with reference to FIGS. 1 to 3.
  • the second step of the process consists in crimping a base 19 on the end of the previously bordered element.
  • the edge of the truncopyramidal element used is regular, a good quality crimping is obtained, the risks of leakage being thus avoided.
  • FIG. 5 illustrates a container 18 obtained by the method which has just been described.
  • This container comprises, near the bottom 19, an anti-camber ring 13.
  • This container can also include a rod 20, at least in the corners, to allow easy separation of the previously stacked containers.
  • a cover 21 and a handle 22 can also be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

The invention relates to a method for making a hollow metal object of truncated pyramidal form in which: - at least one blank of rectangular shape is cut out in a metal sheet, - two opposed edges of the said bottom are brought into a specified position, so as to form a body of cylindrical shape, - welding together the said edges in the said position, - the said body of cylindrical shape is shaped so as to obtain a body of truncated pyramidal shape, - a retention ring is produced on the periphery of the said body and in the vicinity of one end of the latter, the concavity of which faces outwards from the said body, the depth of the said concavity varying continuously between a maximum value on the small sides of the said body up to a substantially minimum value in the centre of the two large sides, so that the said end has a uniform edge. <IMAGE>

Description

L'invention concerne les récipients métalliques de forme troncopyramidale, constitués d'un élément creux et d'un fond serti sur cet élément, notamment destinés à contenir de la peinture.The invention relates to metal containers of truncopyramidal shape, consisting of a hollow element and a bottom crimped on this element, in particular intended to contain paint.

L'invention est plus particulièrement relative à un procédé de fabrication d'un élément creux métallique et d'un récipient métallique, de forme troncopyramidale. Elle concerne également un élément métallique creux ainsi qu'un récipient métallique, de forme tronco-pyramidale.The invention relates more particularly to a method of manufacturing a hollow metal element and a metal container, of truncopyramidal shape. It also relates to a hollow metal element as well as a metal container, of tronco-pyramidal shape.

On connait différents procédés de fabrication de récipients métalliques qui diffèrent selon la forme de ces récipients.Different methods of manufacturing metal containers are known, which differ according to the shape of these containers.

Dans le cas d'un récipient métallique de forme cylindrique, le procédé peut consister à découper, dans une feuille de métal, des flancs métalliques de forme rectangulaire. La découpe est réalisée à l'aide de deux cisailles circulaires. Ce procédé de découpe est le plus économique car il permet d'optimiser à la fois l'utilisation de la matière première (feuille de métal mince) en réduisant au maximum les déchets de découpe, le coût de main-d'oeuvre de découpe en optimisant les cadences et le coût de l'investissement de la machine utilisée.In the case of a metal container of cylindrical shape, the method can consist in cutting, from a metal sheet, metal sides of rectangular shape. The cutting is carried out using two circular shears. This cutting process is the most economical because it optimizes both the use of the raw material (thin metal sheet) by reducing cutting waste as much as possible, the cost of cutting labor in optimizing the rates and the investment cost of the machine used.

Le procédé consiste ensuite à souder le cylindre obtenu en rapprochant deux côtés opposés du flanc rectangulaire, avec un léger recouvrement et parallèlement à l'axe du cylindre ainsi formé. On procède ensuite au bordage d'au moins une extrémité du cylindre. Le bordage est réalisé par évasement de façon à obtenir un bord tombé régulier. Cette étape de bordage permet de préparer le sertissage du fond qui est réalisé dans une dernière étape et permet d'obtenir l'étanchéité de ce serti. Entre les étapes de bordage et le sertissage, un moulurage du corps du récipient peut éventuellement être réalisé.The method then consists in welding the cylinder obtained by bringing two opposite sides of the rectangular flank, with a slight overlap and parallel to the axis of the cylinder thus formed. Next, at least one end of the cylinder is planked. The planking is carried out by flaring so as to obtain a regular fallen edge. This planking step makes it possible to prepare the crimping of the bottom which is carried out in a last step and makes it possible to obtain the tightness of this crimp. Between the planking steps and the crimping, a molding of the body of the container can optionally be produced.

On connait également un procédé de fabrication de récipients métalliques de forme conique.There is also known a method of manufacturing metal containers of conical shape.

Comme pour le récipient métallique de forme cylindrique, le procédé consiste à découper un flanc de forme rectangulaire et à procéder à son soudage de façon à obtenir un corps cylindrique. On réalise alors le formage du corps en déformant de façon permanente le corps cylindrique, à l'aide d'un outil d'expansion agissant suivant l'axe du cylindre et monté sur une machine adéquate. Ce formage permet d'obtenir un corps de forme conique.As for the metal container of cylindrical shape, the method consists in cutting a sidewall of rectangular shape and in carrying out its welding so as to obtain a cylindrical body. The body is then formed by permanently deforming the cylindrical body, using an expansion tool acting along the axis of the cylinder and mounted on a suitable machine. This forming makes it possible to obtain a body of conical shape.

Le procédé se poursuit comme précédemment par une étape de bordage et de sertissage du fond, le moulurage éventuel du corps pouvant être réalisé durant l'étape de formage, avec le même outil d'expansion.The process continues as before with a step of edging and crimping the bottom, the possible molding of the body being able to be carried out during the forming step, with the same expansion tool.

On peut envisager de réaliser un récipient métallique de forme tronco-pyramidale selon un procédé analogue à celui permettant d'obtenir un récipient métallique de forme conique. Il suffirait en effet d'utiliser, lors de l'étape de formage, un outil d'expansion permettant d'obtenir un corps de forme troncopyramidale.It is possible to envisage making a metal container of tronco-pyramidal shape according to a process analogous to that making it possible to obtain a metal container of conical shape. It would indeed suffice to use, during the forming step, an expansion tool making it possible to obtain a body of truncopyramidal shape.

Un tel procédé comporte cependant des inconvénients.However, such a method has drawbacks.

L'étape de formage du corps cylindrique permet de déformer le corps cylindrique de façon à lui donner une forme troncopyramidale mais provoque aussi une cambrure ou un cintrage du métal, dans le plan de chacune des quatre faces du corps en forme de tronc de pyramide aux deux extrémités de celui-ci. Ce procédé ne permet donc pas d'obtenir un bord régulier sur les extrémités du corps. Ceci entraîne des risques de mauvaise réalisation du sertissage du fond du récipient et donc des risques de fuite lorsque le récipient est rempli.The stage of forming the cylindrical body makes it possible to deform the cylindrical body so as to give it a troncopyramidal shape but also causes a camber or a bending of the metal, in the plane of each of the four faces of the body in the form of a trunk of pyramid with two ends of it. This process therefore does not allow a regular edge to be obtained on the ends of the body. This entails risks of improper crimping of the bottom of the container and therefore risk of leakage when the container is filled.

On peut prévoir de pallier cet inconvénient en cisaillant le corps de forme troncopyramidale pour supprimer le cintrage. Ceci entraine cependant des opérations supplémentaires qui sont coûteuses. On peut également envisager d'étirer le corps de forme troncopyramidale dans les angles. Ceci nécessite deux opérations supplémentaires, ce qui se révèle également onéreux.We can plan to overcome this drawback by shearing the body of truncopyramidal shape to eliminate bending. This however involves additional operations which are costly. One can also consider stretching the body of truncopyramidal shape in the corners. This requires two additional operations, which also turns out to be expensive.

On peut également envisager d'effectuer un rétreint dans les angles du corps de forme troncopyramidale. Ceci permet de diminuer la section du corps et de supprimer le cintrage. Cette technique comporte cependant des inconvénients. Le principal inconvénient consiste dans le risque de blesser le métal dans les angles et d'entrainer la détérioration de la couche protectrice recouvrant la partie intérieure du récipient, entrainant ainsi des risques de corrosion lors de l'utilisation du récipient. On peut de plus noter que la profondeur du rétreint est limitée technologiquement.One can also consider carrying out a constriction in the angles of the body of truncopyramidal shape. This makes it possible to reduce the section of the body and to eliminate the bending. This technique has drawbacks, however. The main disadvantage consists in the risk of injuring the metal in the corners and of causing the deterioration of the protective layer covering the interior part of the container, thus causing risks of corrosion when the container is used. It can also be noted that the depth of the necking is technologically limited.

On peut également citer un procédé ancien conçu spécialement à l'origine pour les boîtes de corned-beef. Ce procédé consiste à découper dans une feuille de métal un flanc de forme complexe à l'aide d'une presse. Ce flanc présente la forme d'une portion de couronne circulaire où alternent cordes et arcs. On procède ensuite au soudage du tronc de cône obtenu en rapprochant les deux portions de rayon du flanc, avec un léger recouvrement. Puis on procède à la mise en forme de ce tronc de cône, de façon à obtenir un tronc de pyramide. On réalise alors le bordage à au moins une extrémité de ce tronc de pyramide, par évasement. L'opération de bordage permet d'obtenir un bord régulier, celui-ci étant prédéterminé par la forme et les dimensions du flanc métallique découpé. Cette étape de bordage permet de préparer la dernière étape du procédé qui consiste à sertir un fond sur l'extrémité bordée.We can also cite an old process specially designed originally for boxes of corned beef. This process consists of cutting a flank of complex shape from a metal sheet using a press. This side has the shape of a circular crown portion where alternating strings and arcs. The next step is to weld the truncated cone obtained by bringing the two radius portions closer to the sidewall, with a slight overlap. Then we proceed to the shaping of this truncated cone, so as to obtain a pyramid trunk. The planking is then carried out at at least one end of this trunk of the pyramid, by flaring. The planking operation makes it possible to obtain an edge regular, this being predetermined by the shape and dimensions of the cut metal flank. This planking step makes it possible to prepare the last step of the process which consists in crimping a base on the plating end.

On constate que ce procédé présente l'avantage de permettre d'obtenir directement un corps de forme troncopyramidale présentant un bord régulier sur lequel un fond peut être serti après l'étape de bordage. Ce procédé présente cependant l'inconvénient d'entrainer une mauvaise utilisation de la matière première. En effet, la découpe dans une feuille de métal de flancs métalliques présentant une forme complexe entraine des déchets relativement importants.It is noted that this process has the advantage of making it possible to directly obtain a body of truncopyramidal shape having a regular edge on which a base can be crimped after the planking step. However, this method has the disadvantage of causing improper use of the raw material. Indeed, cutting into a metal sheet metal flanks having a complex shape results in relatively large waste.

L'invention a pour objet de pallier ces inconvénients en proposant un procédé de fabrication d'éléments creux ou de récipients de forme troncopyramidale, permettant d'optimiser l'utilisation de la matière première ainsi que le nombre d'opérations nécessaires, afin de limiter le coût de revient de cet élément creux ou de ce récipient.The object of the invention is to overcome these drawbacks by proposing a method of manufacturing hollow elements or containers of truncopyramidal shape, making it possible to optimize the use of the raw material as well as the number of operations required, in order to limit the cost price of this hollow element or of this container.

L'invention est ainsi relative à un procédé de fabrication d'un élément métallique creux de forme troncopyramidale selon lequel :

  • on découpe, dans une feuille de métal, au moins un flanc de forme rectangulaire,
  • on rapproche deux bords opposés dudit flanc dans une position déterminée de façon à former un corps de forme cylindrique,
  • on soude ensemble lesdits bords dans ladite position,
  • on met en forme ledit corps de forme cylindrique de façon à obtenir un corps de forme troncopyramidale,
  • on réalise un jonc, sur la périphérie dudit corps et à proximité d'une extrémité de celui-ci, dont la concavité est tournée vers l'extérieur dudit corps, la profondeur de ladite concavité variant de façon continue entre une valeur maximale sur les petits côtés dudit corps jusqu'à une valeur minimale sensiblement au centre des deux grands côtés, de façon à ce que ladite extrémité présente un bord régulier.
The invention thus relates to a method of manufacturing a hollow metallic element of truncopyramidal shape according to which:
  • at least one sidewall of rectangular shape is cut from a metal sheet,
  • two opposite edges are brought closer to said side in a determined position so as to form a body of cylindrical shape,
  • said edges are welded together in said position,
  • said body of cylindrical shape is shaped so as to obtain a body of truncopyramidal shape,
  • a rod is made on the periphery of said body and close to one end thereof, the concavity of which is turned towards the outside of said body, the depth of said concavity varying continuously between a maximum value on the short sides of said body up to a minimum value substantially in the center of the two long sides, so that said end has a regular edge.

De préférence, l'extrémité dudit corps de forme troncopyramidale à proximité de laquelle est réalisée ledit jonc correspond à celle de la section transversale la plus faible.Preferably, the end of said body of truncopyramidal shape near which said rod is made corresponds to that of the smallest cross section.

L'invention est également relative à un procédé de fabrication d'un récipient métallique de forme troncopyramidale selon lequel :

  • on réalise un élément métallique creux de forme tronco-pyramidale selon le procédé qui vient d'être décrit,
  • on réalise un bordage par évasement à ladite extrémité de cet élément et
  • on sertit un fond de forme correspondante, sur ladite extrémité bordée de cet élément.
The invention also relates to a method of manufacturing a metal container of truncopyramidal shape according to which:
  • a hollow metal element of truncated-pyramidal shape is produced according to the process which has just been described,
  • a flaring planking is made at said end of this element and
  • a base of corresponding shape is crimped on said lined end of this element.

L'invention est également relative à un élément métallique creux de forme troncopyramidale constitué d'une feuille de métal soudé et comportant sur sa périphérie et à proximité d'une extrémité, un jonc dont la concavité est dirigée vers l'extérieur dudit élément, la profondeur de ladite concavité variant de façon continue entre une valeur maximale sur les petits côtés dudit élément et une valeur minimale sensiblement au centre des grands côtés dudit élément.The invention also relates to a hollow metallic element of truncopyramidal shape consisting of a welded sheet of metal and comprising on its periphery and near one end, a rod whose concavity is directed towards the outside of said element, the depth of said concavity varying continuously between a maximum value on the short sides of said element and a minimum value substantially at the center of the long sides of said element.

De préférence, l'extrémité de l'élément à proximité de laquelle se trouve ledit jonc est celle présentant la plus faible section transversale.Preferably, the end of the element near which said rod is located is that having the smallest cross section.

L'invention est également relative à un récipient métallique de forme troncopyramidale comprenant un élément métallique creux tel qu'il vient d'être décrit et un fond serti sur l'extrémité de cet élément comportant ledit jonc.The invention also relates to a metal container of truncopyramidal shape comprising a hollow metal element as just described and a bottom set on the end of this element comprising said rod.

L'invention sera mieux comprise et d'autres buts, avantages et caractéristiques de celle-ci apparaitront plus clairement à la lecture de la description qui suit de modes non limitatifs de réalisation de l'invention, faite en référence aux dessins annexés sur lesquels :

  • la figure 1 représente une demi-vue en coupe d'un dispositif de bordage et de formation du jonc, en position ouverte,
  • la figure 2 représente une demi-vue en coupe selon II-II de la figure 1,
  • la figure 3 représente une demi-vue en coupe du dispositif de formation du jonc et de bordage, en position fermée,
  • la figure 4 comprend les figures 4a et 4b : la figure 4a représente une vue de dessus d'un élément creux de forme troncopyramidale selon l'invention et la figure 4b une vue en perspective de cet élément,
  • la figure 5 représente une vue de côté d'un récipient de forme troncopyramidale selon l'invention.
The invention will be better understood and other objects, advantages and characteristics thereof will appear more clearly on reading the following description of nonlimiting embodiments of the invention, made with reference to the appended drawings in which:
  • FIG. 1 represents a half-view in section of a device for edging and forming the rod, in the open position,
  • FIG. 2 represents a half-view in section along II-II of FIG. 1,
  • FIG. 3 represents a half-view in section of the device for forming the rod and planking, in the closed position,
  • FIG. 4 includes FIGS. 4a and 4b: FIG. 4a represents a top view of a hollow element of truncopyramidal shape according to the invention and FIG. 4b a perspective view of this element,
  • FIG. 5 represents a side view of a container of truncopyramidal shape according to the invention.

Les éléments communs aux différentes figures seront désignés par les mêmes références.The elements common to the different figures will be designated by the same references.

Le procédé selon l'invention permettant d'obtenir un élément creux de forme troncopyramidale, consiste tout d'abord à découper, dans une feuille de métal, des flancs métalliques de forme rectangulaire. Les dimensions des flancs sont choisies en fonction de celles de l'élément troncopyramidal que l'on souhaite obtenir. Comme pour les procédés connus d'obtention de récipients métalliques de forme cylindrique, la découpe est de préférence réalisée à l'aide de deux cisailles circulaires. Ce procédé de découpe est, en effet, le plus économique.The method according to the invention making it possible to obtain a hollow element of truncopyramidal shape, firstly consists in cutting, from a metal sheet, metal sides of rectangular shape. The dimensions of the sidewalls are chosen as a function of those of the truncopyramidal element which it is desired to obtain. As with the known methods for obtaining metal containers of cylindrical shape, the cutting is preferably carried out using two circular shears. This cutting process is, in the most economical.

On procède ensuite à la soudure du cylindre obtenu en rapprochant deux côtés opposés du flanc rectangulaire, parallèlement à l'axe du cylindre ainsi formé. De préférence, les deux côtés opposés du flanc rectangulaire qui sont rapprochés présentent un léger recouvrement.The cylinder obtained is then welded by bringing two opposite sides of the rectangular flank, parallel to the axis of the cylinder thus formed. Preferably, the two opposite sides of the rectangular flank which are brought together have a slight overlap.

Comme dans les procédés connus de fabrication de récipients métalliques de forme conique, on réalise alors le formage du corps cylindrique obtenu, en le déformant de façon permanente à l'aide d'un outil d'expansion agissant suivant l'axe du cylindre et monté sur une machine adéquate. L'outil d'expansion est choisi de telle sorte que l'étape de formage permette d'obtenir un corps de forme troncopyramidale.As in the known methods of manufacturing metal containers of conical shape, the cylindrical body obtained is then formed, by deforming it permanently using an expansion tool acting along the axis of the cylinder and mounted on a suitable machine. The expansion tool is chosen so that the forming step makes it possible to obtain a body of truncopyramidal shape.

Comme exposé précédemment, le corps troncopyramidal obtenu ne présente de bord régulier à aucune de ses extrémités. En effet, l'étape de formage provoque un cintrage du métal dans le plan de chacune des quatre faces du corps, aux deux extrémités de celui-ci.As explained above, the truncopyramidal body obtained does not have a regular edge at any of its ends. Indeed, the forming step causes the metal to bend in the plane of each of the four faces of the body, at the two ends of the latter.

Le procédé consiste alors à réaliser un jonc sur la périphérie du corps de forme troncopyramidale et à proximité d'une des deux extrémités de ce corps.The method then consists in making a rod on the periphery of the body of truncopyramidal shape and near one of the two ends of this body.

Comme cela est illustré par la figure 4, le jonc 13 est réalisé le long d'une section transversale de l'élément 12 de forme troncopyramidale. La concavité de ce jonc est dirigée vers l'extérieur de l'élément.As illustrated in Figure 4, the rod 13 is formed along a cross section of the element 12 of truncopyramidal shape. The concavity of this rod is directed towards the outside of the element.

La profondeur de cette concavité sera fixée en fonction de la cambrure obtenue lors de l'opération de formage du corps de forme cylindrique. Pour permettre de compenser cette cambrure, la profondeur de la concavité n'est pas constante sur toute la périphérie de l'élément 12. Elle varie de façon continue entre une valeur maximale sur chacun des deux petits côtés 14, 15 de l'élément de forme troncopyramidale jusqu'à une valeur minimale sensiblement au milieu de chacun des deux grands côtés 16, 17 de cet élément 12. Les valeurs maximale et minimale de la profondeur de la concavité ainsi que sa variation seront déterminées pour chaque élément de forme donnée.The depth of this concavity will be fixed as a function of the camber obtained during the operation of forming the body of cylindrical shape. To compensate for this camber, the depth of the concavity is not constant over the entire periphery of the element 12. It varies continuously between a maximum value on each of the two short sides 14, 15 of the truncopyramidal element up to a minimum value substantially in the middle of each of the two long sides 16, 17 of this element 12. The maximum and minimum values of the depth of the concavity as well as its variation will be determined for each element of given form.

C'est l'excès de métal lié à la cambrure de l'élément sur chacune de ses extrémités qui sert à former ce jonc. Ainsi, après cette opération, on obtient un élément de forme troncopyramidale dont l'extrémité, à proximité de laquelle a été formé le jonc, présente un bord régulier.It is the excess of metal linked to the camber of the element on each of its ends which is used to form this ring. Thus, after this operation, an element of truncated pyramid shape is obtained, the end of which, near which the rod was formed, has a regular edge.

Peut ensuite intervenir l'opération de bordage de cette extrémité de l'élément, qui est réalisé par évasement.Can then intervene the planking operation of this end of the element, which is produced by flaring.

La réalisation du jonc anti-cambrure va maintenant être décrite de façon plus précise en référence aux figures 1 à 3.The production of the anti-cambering rod will now be described in more detail with reference to FIGS. 1 to 3.

La référence 1 désigne un corps de forme troncopyramidale, tel qu'obtenu après les opérations de découpe, soudage et formage. L'axe de ce corps est désigné par la référence 10.The reference 1 designates a body of truncopyramidal shape, as obtained after the cutting, welding and forming operations. The axis of this body is designated by reference 10.

L'outillage permettant la formation du jonc anti-cambrure est désigné par la référence 2. Il comprend une première partie 3 destinée à être placée autour du corps 1 et une deuxième partie 4 destinée à être placée en vis-à-vis de la première, à l'intérieur du corps 1. De façon préférée, ces première et deuxième parties 3 et 4 sont réalisées en quatre éléments séparés. Les éléments sont mobiles et sont manoeuvrés par des moyens appropriés, connus de l'homme de l'art et non représentés sur la figure.The tool allowing the formation of the anti-cambering rod is designated by the reference 2. It comprises a first part 3 intended to be placed around the body 1 and a second part 4 intended to be placed opposite the first , inside the body 1. Preferably, these first and second parts 3 and 4 are made of four separate elements. The elements are mobile and are operated by appropriate means, known to those skilled in the art and not shown in the figure.

Chacun des éléments de la première partie 3 présente une forme sensiblement en L correspondant à un quart du corps 1, défini par ses deux axes de symétrie. La hauteur de chaque élément est au moins une fraction de celle du corps 1. La forme de la surface intérieure 6 de chaque élément correspond sensiblement à celle de la surface externe du corps 1, de façon à pouvoir épouser la forme de celui-ci. Il en est de même pour la surface externe 7 de chaque élément de la deuxième partie 4 en regard de la face intérieure du corps 1.Each of the elements of the first part 3 has a substantially L-shaped shape corresponding to a quarter of the body 1, defined by its two axes of symmetry. The height of each element is at least a fraction of that of the body 1. The shape of the inner surface 6 of each element corresponds substantially to that of the outer surface of the body 1, so as to be able to match the shape of the latter. It is the same for the external surface 7 of each element of the second part 4 opposite the internal face of the body 1.

Chaque élément de la première partie 3 comporte, sur sa surface intérieure 6 une empreinte en relief 8, correspondant à la forme du jonc que l'on souhaite réaliser. Chaque élément de la deuxième partie 4 comporte, sur sa surface extérieure 7, une empreinte en creux 9 correspondant à l'empreinte en relief 8 de chaque élément de la première partie 3.Each element of the first part 3 has, on its inner surface 6 a relief imprint 8, corresponding to the shape of the rod that it is desired to produce. Each element of the second part 4 has, on its outer surface 7, a hollow imprint 9 corresponding to the relief imprint 8 of each element of the first part 3.

Le fonctionnement de cet outillage est le suivant. Les quatre parties symétriques de la deuxième partie 4 sont placées à l'intérieur du corps de boîte, de façon à placer l'empreinte en creux 9 à l'endroit où l'on souhaite réaliser le jonc. On place aussi chaque élément de la première partie 3 autour du corps 1, de façon à ce que les empreintes en relief 8 se trouvent sensiblement en regard d'une empreinte 9 en creux d'un élément de la deuxième partie 4 correspondant. On plaque ensuite chaque élément de la première partie 3 contre le corps 1, suivant les flèches F1. On agit également sur chaque élément de la deuxième partie 4 de façon à ce que ceux-ci viennent se plaquer contre le corps 1 suivant les flèches F2. En agissant ainsi sur les première et deuxième parties 3 et 4 selon les flèches F1 et F2, on réalise l'emboutissage du corps 1 par l'empreinte du jonc anti-cambrure, correspondant aux empreintes en relief 8 et en creux 9. Cette opération d'emboutissage est plus particulièrement illustrée par la figure 3.The operation of this tool is as follows. The four symmetrical parts of the second part 4 are placed inside the box body, so as to place the hollow imprint 9 at the place where it is desired to make the rod. Each element of the first part 3 is also placed around the body 1, so that the raised imprints 8 are located substantially opposite a hollow imprint 9 of an element of the corresponding second part 4. Each element of the first part 3 is then pressed against the body 1, according to the arrows F1. One also acts on each element of the second part 4 so that they come to be pressed against the body 1 according to the arrows F2. By thus acting on the first and second parts 3 and 4 according to the arrows F1 and F2, the body 1 is stamped by the imprint of the anti-cambering rod, corresponding to the imprints in relief 8 and in hollow 9. This operation stamping is more particularly illustrated by FIG. 3.

Les figures 1 à 3 illustrent également l'étape de bordage qui peut être ensuite réalisée. Pour cela, l'outillage permettant la formation du jonc anti-cambrure est complété d'une troisième partie 5. Cette troisième partie 5 est également constituée de quatre éléments symétriques et mobiles. Ces quatre éléments sont manoeuvrés par tout moyen approprié et connu de l'homme de l'art. La troisième partie présente une forme sensiblement parallélipipédique dont la section transversale présente une surface supérieure à celle de la section située à l'extrémité du corps de boîte près de laquelle a été formé le jonc. Elle présente également sur toute sa périphérie et sur une partie de sa hauteur un décrochement 11. Chaque élément de cette troisième partie 5 est destiné à être placé au moins partiellement à l'intérieur du corps 1, comme indiqué sur la figure 1. On remarque que la troisième partie 5 est positionnée de telle sorte que l'extrémité, ici inférieure, du corps 1, à proximité de laquelle sera ou est réalisé le jonc, repose sur la partie horizontale du décrochement 11. Après la formation du jonc, on agit sur chaque élément de la troisième partie 5 de façon à les mouvoir dans le sens et la direction indiqués par la flèche F3. Comme cela est illustré à la figure 3, cette opération permet d'évaser, vers l'extérieur du corps 1 l'extrémité inférieure de celui-ci et de réaliser le bordage de l'extrémité inférieure de ce bord.Figures 1 to 3 also illustrate the planking step which can then be carried out. For this, the tool allowing the formation of the anti-camber ring is supplemented by a third part 5. This third part 5 also consists of four symmetrical and mobile elements. These four elements are operated by any appropriate means known to those skilled in the art. The third part has a substantially parallelepiped shape whose cross section has a surface greater than that of the section located at the end of the box body near which the rod was formed. It also has over its entire periphery and over part of its height a recess 11. Each element of this third part 5 is intended to be placed at least partially inside the body 1, as shown in Figure 1. We note that the third part 5 is positioned so that the end, here lower, of the body 1, near which the rod will be or is made, rests on the horizontal part of the recess 11. After the formation of the rod, we act on each element of the third part 5 so as to move them in the direction and direction indicated by the arrow F3. As illustrated in FIG. 3, this operation makes it possible to flare, towards the outside of the body 1, the lower end of the latter and to make the planking of the lower end of this edge.

On comprend qu'une fois que les opérations de formage du jonc anti-cambrure et de bordage de l'extrémité du corps 1 sont réalisées, les différentes parties de l'outillage (3, 4 et 5) sont déplacées en sens inverse des flèches F1, F2 et F3, afin de pouvoir retirer l'élément métallique creux de forme troncopyramidale ainsi formé de l'outillage.It is understood that once the operations for forming the anti-camber ring and for edging the end of the body 1 are carried out, the different parts of the tool (3, 4 and 5) are moved in the opposite direction to the arrows F1, F2 and F3, in order to be able to remove the hollow metallic element of truncopyramidal shape thus formed from the tooling.

On constate ainsi que le procédé selon l'invention qui vient d'être décrit permet de remédier au cintrage du métal en une seule opération supplémentaire, laquelle consiste à former le jonc anti-cambrure. Ce procédé reste donc économique, puisque l'outillage 2 servant à former le jonc, participe également à la réalisation du bordage, et que, de ce fait, un intervalle de temps très court sépare les étapes de formation du jonc et de bordage.It can thus be seen that the method according to the invention which has just been described makes it possible to remedy the bending of the metal in a single additional operation, which consists in forming the anti-camber ring. This process therefore remains economical, since the tool 2 used to form the rod, also participates in the planking, and that, therefore, a very short time interval separates the stages of rod formation and planking.

Le procédé de fabrication du récipient métallique de forme troncopyramidale selon l'invention consiste à réaliser un élément de forme troncopyramidale selon le procédé qui vient d'être décrit, cet élément présentant des dimensions correspondant à celles du récipient que l'on souhaite obtenir.The method of manufacturing the metal container of truncopyramidal shape according to the invention consists in producing an element of troncopyramidal shape according to the process which has just been described, this element having dimensions corresponding to those of the container that it is desired to obtain.

On effectue ensuite un bordage par évasement à l'extrémité de l'élément à proximité de laquelle a été réalisé le jonc anti-cambrure. Le bordage est réalisé par tous moyens appropriés, connus de l'homme de métier, qui ne seront pas décrits ici en détail. Le bordage pourra notamment être réalisé par l'intermédiaire de l'outillage décrit en référence aux figures 1 à 3.A flanging planking is then carried out at the end of the element close to which the anti-cambering rod has been produced. The planking is carried out by any suitable means, known to those skilled in the art, which will not be described here in detail. The planking can in particular be carried out by means of the tool described with reference to FIGS. 1 to 3.

La deuxième étape du procédé consiste en le sertissage d'un fond 19 sur l'extrémité de l'élément précédemment bordé. Le bord de l'élément troncopyramidal utilisé étant régulier, on obtient un sertissage de bonne qualité, les risques de fuite étant ainsi évités.The second step of the process consists in crimping a base 19 on the end of the previously bordered element. The edge of the truncopyramidal element used is regular, a good quality crimping is obtained, the risks of leakage being thus avoided.

On comprend que l'on choisit pour réaliser le bordage et sertir le fond, l'extrémité de l'élément correspondant à celle de plus faible section pour que les récipients obtenus soient empilables.We understand that we choose to make the planking and crimp the bottom, the end of the element corresponding to that of smaller section so that the containers obtained are stackable.

La figure 5 illustre un récipient 18 obtenu par le procédé qui vient d'être décrit. Ce récipient comporte, près du fond 19, un jonc 13 anti-cambrure.FIG. 5 illustrates a container 18 obtained by the method which has just been described. This container comprises, near the bottom 19, an anti-camber ring 13.

Ce récipient peut également comporter un jonc 20, au moins dans les angles, pour permettre de séparer facilement les récipients précédemment empilés. Un couvercle 21 et une anse 22 peuvent aussi être prévus.This container can also include a rod 20, at least in the corners, to allow easy separation of the previously stacked containers. A cover 21 and a handle 22 can also be provided.

Les signes de référence insérés après les caractéristiques techniques énoncées dans les revendications ont pour seul but de faciliter la compréhension de ces dernières ne peuvent avoir en aucun cas pour effet de limiter l'invention aux modes particuliers de réalisations qui viennent d'être décrits.The reference signs inserted after the technical characteristics set out in the claims have the sole purpose of facilitating the understanding of the latter can in no case have the effect of limiting the invention to the particular embodiments which have just been described.

Claims (9)

Procédé de fabrication d'un élément métallique creux de forme troncopyramidale selon lequel : - on découpe, dans une feuille de métal, au moins un flanc de forme rectangulaire, - on rapproche deux bords opposés dudit fond dans une position déterminée, de façon à former un corps de forme cylindrique, - on soude ensemble lesdits bords dans ladite position, - on met en forme ledit corps de forme cylindrique de façon à obtenir un corps de forme troncopyramidale (1), - on réalise un jonc (13), sur la périphérie dudit corps et à proximité d'une extrémité de celui-ci, dont la concavité est tournée vers l'extérieur dudit corps, la profondeur de ladite concavité variant de façon continue entre une valeur maximale sur les petits côtés dudit corps jusqu'à une valeur minimale sensiblement au centre des deux grands côtés, de façon à ce que ladite extrémité présente un bord régulier. Method of manufacturing a hollow metallic element of truncopyramidal shape according to which: - at least one sidewall of rectangular shape is cut from a metal sheet, - two opposite edges are brought closer to said bottom in a determined position, so as to form a body of cylindrical shape, - said edges are welded together in said position, - said body of cylindrical shape is shaped so as to obtain a body of truncopyramidal shape (1), - A rod (13) is produced, on the periphery of said body and near one end thereof, whose concavity is turned towards the outside of said body, the depth of said concavity varying continuously between a value maximum on the short sides of said body to a minimum value substantially at the center of the two long sides, so that said end has a regular edge. Procédé de fabrication d'un élément métallique creux de forme troncopyramidale d'après la revendication 1, selon lequel l'extrémité dudit corps de forme troncopyramidale à proximité de laquelle est réalisé ledit jonc correspond à celle de la section transversale la plus faible.A method of manufacturing a hollow metal element of truncopyramidal shape according to claim 1, according to which the end of said body of truncopyramidal shape near which said rod is made corresponds to that of the smallest cross section. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce qu'on réalise ledit jonc en plaçant à l'extérieur dudit corps (1) une première partie (3) dont la forme de la surface intérieure (6) correspond sensiblement à celle de la surface externe dudit corps (1) et qui comporte une empreinte en relief (8) correspondant à la forme du jonc que l'on souhaite obtenir et en plaçant à l'intérieur dudit corps (1) une deuxième partie (4) dont la forme de la surface extérieure (7) correspond sensiblement à celle de la surface interne dudit corps (1) et qui comporte une empreinte en creux (9) correspondant à l'empreinte en relief (8) de la première partie (3), lesdites première et deuxième parties (3, 4) étant placées de telle sorte que lesdites empreintes (8, 9) se trouvent sensiblement en regard l'une de l'autre, puis en agissant sur lesdites première et deuxième parties (3, 4) de façon à réaliser l'emboutissage du corps (1) par l'empreinte dudit jonc (13) correspondant auxdites empreintes (8, 9).Method according to one of claims 1 or 2, characterized in that said rod is produced by placing outside of said body (1) a first part (3) whose shape of the internal surface (6) corresponds substantially to that of the external surface of said body (1) and which has a raised imprint (8) corresponding to the shape of the rod that one wishes to obtain and by placing inside said body (1) a second part (4) whose surface shape outer (7) corresponds substantially to that of the inner surface of said body (1) and which has a hollow imprint (9) corresponding to the raised imprint (8) of the first part (3), said first and second parts (3, 4) being placed so that said imprints (8, 9) are located substantially opposite one another, then acting on said first and second parts (3, 4) so as to produce the stamping of the body (1) by the imprint of said rod (13) corresponding to said imprints (8, 9). Procédé selon la revendication 3, caractérisé en ce que lesdites première et deuxième parties (3, 4) sont réalisées en quatre éléments séparés et symétriques.Method according to claim 3, characterized in that said first and second parts (3, 4) are made of four separate and symmetrical elements. Procédé de fabrication d'un récipient métallique de forme troncopyramidale selon lequel : - on réalise un élément (12) métallique creux de forme troncopyramidale d'après le procédé selon l'une des revendications 1 à 4, - on réalise un bordage par évasement à ladite extrémité de cet élément (12), - on sertit un fond (19) de forme correspondante sur ladite extrémité bordée de cet élément (12). Method of manufacturing a metal container of truncopyramidal shape according to which: a hollow metal element (12) of truncated pyramid shape is produced according to the method according to one of claims 1 to 4, - a flaring planking is made at said end of this element (12), - A bottom (19) of corresponding shape is crimped on said lined end of this element (12). Procédé selon la revendication 5, caractérisé en ce qu'on réalise le bordage par l'intermédiaire d'une troisième partie (5), de forme sensiblement parallélipipédique dont la section transversale présente une surface supérieure à celle de la section de ladite extrémité dudit corps (1), ladite troisième partie comportant sur toute sa périphérie et sur une partie de sa hauteur un décrochement (11), en positionnant ladite troisième partie (5) de telle sorte que ladite extrémité dudit corps (1) repose sur la partie horizontale dudit décrochement (11) et en agissant sur ladite troisième partie (5) de façon à évaser vers l'extérieur dudit corps (1) ladite extrémité dudit corps.A method according to claim 5, characterized in that the planking is carried out by means of a third part (5), of substantially parallelepiped shape, the cross section of which has a surface greater than that of the section of said end of said body. (1), said third part comprising over its entire periphery and over part of its height a recess (11), by positioning said third part (5) so that said end of said body (1) rests on the horizontal part of said offset (11) and acting on said third part (5) so as to flare outward of said body (1) said end of said body. Elément métallique creux de forme troncopyramidale constitué d'une feuille de métal soudée et comportant sur sa périphérie et à proximité d'une extrémité, un jonc (13) dont la concavité est dirigée vers l'extérieur dudit élément (12), la profondeur de ladite concavité variant de façon continue entre une valeur maximale sur les petits côtés (14, 15) dudit élément et une valeur minimale sensiblement au centre des grands côtés (16, 17) dudit élément.Hollow metal element of truncopyramidal shape consisting of a welded metal sheet and comprising on its periphery and near one end, a rod (13) whose concavity is directed towards the outside of said element (12), the depth of said concavity varying continuously between a maximum value on the short sides (14, 15) of said element and a minimum value substantially at the center of the long sides (16, 17) of said element. Elément métallique creux de forme troncopyramidale d'après la revendication 7 selon lequel l'extrémité de l'élément à proximité de laquelle se trouve ledit jonc (13) est celle présentant la plus faible section transversale.Hollow metallic element of truncopyramidal shape according to claim 7 according to which the end of the element in the vicinity of which is said rod (13) is that having the smallest cross section. Récipient métallique de forme troncopyramidale comprenant un élément métallique creux selon l'une des revendications 7 ou 8 et un fond (19) serti sur l'extrémité de cet élément (12) comportant ledit jonc (13).Metallic container of truncopyramidal shape comprising a hollow metallic element according to one of claims 7 or 8 and a bottom (19) crimped on the end of this element (12) comprising said rod (13).
EP91400587A 1990-03-14 1991-03-04 Method of making hollow objects and metal containers of truncated pyramidal form and hollow objects and metal containers of truncated pyramidal form Withdrawn EP0448436A1 (en)

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FR9003282 1990-03-14
FR9003282A FR2659579B1 (en) 1990-03-14 1990-03-14 METHOD FOR MANUFACTURING HOLLOW ELEMENT AND METAL CONTAINER OF TRONCOPYRAMIDAL FORM AND HOLLOW ELEMENT AND METAL CONTAINER OF TRONCOPYRAMIDAL FORM.

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EP (1) EP0448436A1 (en)
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FR2083520A1 (en) * 1970-03-23 1971-12-17 Huber Karl
FR2430892A1 (en) * 1978-07-13 1980-02-08 Monfalconesi E Passero Off Paint can prodn. method - using cylindrical rolled plate with flanged reinforced lid edge
GB2075462A (en) * 1980-04-30 1981-11-18 Plm Ab Sheet-meal Container
GB2097747A (en) * 1981-05-01 1982-11-10 Right Hand Man Ltd Rimmed containers

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US3172386A (en) * 1962-12-28 1965-03-09 American Can Co Can manufacturing method
FR2083520A1 (en) * 1970-03-23 1971-12-17 Huber Karl
FR2430892A1 (en) * 1978-07-13 1980-02-08 Monfalconesi E Passero Off Paint can prodn. method - using cylindrical rolled plate with flanged reinforced lid edge
GB2075462A (en) * 1980-04-30 1981-11-18 Plm Ab Sheet-meal Container
GB2097747A (en) * 1981-05-01 1982-11-10 Right Hand Man Ltd Rimmed containers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644123A2 (en) * 1993-09-09 1995-03-22 Jose Rodriguez Campillo Anti-bending corrugated system for metallic containers
EP0644123A3 (en) * 1993-09-09 1995-04-12 Jose Rodriguez Campillo Anti-bending corrugated system for metallic containers.
EP0725009A1 (en) * 1995-02-03 1996-08-07 Safet Embamet Method for making a metallic package having a general prismatic form and package made by this method
FR2730213A1 (en) * 1995-02-03 1996-08-09 Safet Embamet METHOD FOR MANUFACTURING A METALLIC PACKAGING OF A GENERAL PRISMATIC FORM AND PACKAGE OBTAINED THEREBY
US5813565A (en) * 1995-02-03 1998-09-29 Safet Embamet Process for the production of metallic packaging of generally prismatic shape and packaging obtained by this process
WO1997014619A1 (en) * 1995-10-16 1997-04-24 S.I.L.F.A. S.R.L. Societa' Imballagi Latta Fusti Acciaio Metal container provided with circular base and square opening

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FR2659579B1 (en) 1993-08-06
FR2659579A1 (en) 1991-09-20
ES2039338T1 (en) 1993-10-01

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