EP4545196B1 - Dispositif pour la fabrication de petites ébauches d'emballage tubulaire - Google Patents

Dispositif pour la fabrication de petites ébauches d'emballage tubulaire

Info

Publication number
EP4545196B1
EP4545196B1 EP24205901.2A EP24205901A EP4545196B1 EP 4545196 B1 EP4545196 B1 EP 4545196B1 EP 24205901 A EP24205901 A EP 24205901A EP 4545196 B1 EP4545196 B1 EP 4545196B1
Authority
EP
European Patent Office
Prior art keywords
die
tube
blank
tube packaging
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP24205901.2A
Other languages
German (de)
English (en)
Other versions
EP4545196C0 (fr
EP4545196A1 (fr
Inventor
Jürgen Bunk
Johann Wolf
Rudolf Fleischmann
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.)
Linhardt GmbH and Co KG
Original Assignee
Linhardt GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linhardt GmbH and Co KG filed Critical Linhardt GmbH and Co KG
Publication of EP4545196A1 publication Critical patent/EP4545196A1/fr
Application granted granted Critical
Publication of EP4545196C0 publication Critical patent/EP4545196C0/fr
Publication of EP4545196B1 publication Critical patent/EP4545196B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/18—Making uncoated products by impact extrusion
    • B21C23/183—Making uncoated products by impact extrusion by forward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/03—Making uncoated products by both direct and backward extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, rods or tubes
    • B21C23/085—Making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/18—Making uncoated products by impact extrusion
    • B21C23/186—Making uncoated products by impact extrusion by backward extrusion
    • 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
    • B21D51/36—Making hollow objects characterised by the use of the objects collapsible or like thin-walled tubes, e.g. for toothpaste

Definitions

  • the invention relates to a device for the production of small-volume tube packaging blanks.
  • Tube packaging is often formed from blanks produced using an extrusion process.
  • An extrusion process is a forming process in which a workpiece is deformed by applying pressure.
  • the flow direction of the material relative to the direction of die movement provides the basis for distinguishing between forward extrusion (material flow and die movement direction are the same), reverse extrusion (material flow and die movement direction are opposite), and transverse extrusion (material flow perpendicular to the die movement direction).
  • the production of a thin-walled metal tube by reverse extrusion is described in the DE 29 32 016 A1 described.
  • the DE 40 26 921 A1 This also describes a method for manufacturing a thin-walled metal tube.
  • the manufacturing process involves extrusion using a circular blank, the material of which is made to flow under high pressure.
  • the blank material flows both against and in the direction of pressure, with the material flowing in the direction of pressure forming the tube neck, while the material flowing against the direction of pressure forms the tube body.
  • the US-A-2,112,085 discloses a device according to the preamble of claim 1.
  • the present invention is based on the objective of providing a device for the production of tube packaging with which small-volume metal tube packaging can be produced reproducibly in high quantities with low waste. This objective is achieved according to the invention by the device for producing tube packaging blanks according to independent claim 1. Further advantageous aspects, details, and embodiments of the invention will become apparent from the dependent claims, the description, and the drawings.
  • the present invention provides a device for producing tube packaging blanks by extrusion.
  • the device comprises a die, a punch, and an ejector.
  • the punch includes a tool-receiving section, a shaft section, and a punch head.
  • the shaft section, together with the punch head, is formed integrally from a material with a Rockwell hardness of at least 60 HRC, wherein the shaft section, at least in its portion intended for engagement with the die, has the form of a straight circular cylinder with a diameter of at most 10 mm.
  • the die has an interior cavity bounded by a die base and a die wall, wherein the interior cavity forms the negative of the punch head, including the portion of the shaft section adjacent to the punch head and intended for engagement with the die.
  • the die base has an opening arranged concentrically to its circumference. The ejector engages positively in the opening of the die base and closes the opening flush with the die base.
  • the tube packaging blanks are manufactured by extrusion.
  • the material from which the tube packaging blank is to be manufactured is inserted into the die in the form of a disc.
  • the die base has an opening arranged concentrically to its circumference. The disc therefore does not lie completely flat on the die base, but is only supported by a circumferential ring projecting from the die wall. The material of the disc is thus supported by the The high pressure exerted by the press die causes the material to flow. Under this pressure, the material of the blank flows both against and in the direction of pressure. The material flowing in the direction of pressure forms the tube neck, while the material flowing against the direction of pressure forms the tube body.
  • the ejector engages positively in the opening of the die base and closes the opening flush with the die base.
  • a closure of the tube neck is formed on the surface of the ejector that closes the opening in the die base, which serves as a tamper-evident seal for the subsequently produced tube packaging.
  • the one-piece design of the shank section and punch head as provided for in the invention and manufactured from a single piece of material, completely eliminates the tool breakages frequently observed in two- or multi-part devices known from the prior art. It has been found that by using a one-piece press punch, small-volume metal tube packaging blanks can be produced in high quantities with minimal rejects using the extrusion process. While the one-piece design of the shank section and punch head according to the invention does not allow for the replacement of the punch head, which may be necessary due to material wear, as is known from the prior art, this disadvantage is far outweighed by the advantages of a one-piece design, which will be described in more detail below.
  • the use of a material with a Rockwell hardness of at least 60 HRC according to the invention makes it possible to manufacture the shaft section formed from this material, which has the shape of a straight circular cylinder at least in the section intended for engagement with the die, with an extremely small diameter of a maximum of 10 mm.
  • Practical application shows that tube packaging blanks with a maximum tube body diameter of 10 mm can be produced with this type of press die. Production is achieved with high throughput and simultaneously extremely low reject rates of less than 3%.
  • a cylinder is a surface whose points are equidistant from a fixed straight line, the cylinder axis, namely the cylinder radius zr.
  • the cylinder is also bounded by two parallel planes spaced apart by the cylinder height zh. If these planes are perpendicular to the cylinder axis, the result is a right circular cylinder with cylinder height zh and cylinder radius zr.
  • the diameter of a right circular cylinder is twice the cylinder radius r.
  • Rockwell hardness is a unit of measurement for the hardness of technical materials, well-known to those skilled in the art.
  • the unit HRC is composed of the acronym “HR” for "Hardness Rockwell,” indicating the type of test method, and the letter “C,” which denotes the scale and thus the test force and the test specimen.
  • HRC Hardness Rockwell
  • a diamond cone with a 120° tip angle is applied to the material being tested with a force of 1372.931 Newtons.
  • the device according to the invention can comprise a press ram that is constructed in two parts.
  • a tool holder section can be provided, which is screwed to the shank section and thereby firmly fixed.
  • the entire press ram is formed in one piece from a material with a Rockwell hardness of at least 60 HRC.
  • the tool holder section, shank section, and ram head are manufactured from the same material in a single piece.
  • the entire press ram then exhibits extremely high resistance to mechanical stress, has a long service life, and is ideally suited for use in the device according to the invention.
  • the tool holder section of the press ram is designed for mounting in the tool holder of a conventional press.
  • the material from which at least the shank section and punch head are manufactured in one piece preferably the tool holder section, shank section, and punch head are manufactured in one piece, has a Rockwell hardness of at least 63 HRC.
  • a shank section formed from such a material which at least in its section intended for engagement with the die has the form of a straight circular cylinder, can be manufactured with an extremely small diameter of a maximum of 10 mm or, as will be explained in more detail below, even smaller diameters.
  • tube packaging blanks with a tube body diameter of less than 10 mm can be produced with this type of press punch. Production is carried out with high throughput and simultaneously with an extremely low reject rate of less than 3%.
  • a steel 1.3343 with a Rockwell hardness of 64 HRC to 66 HRC is employed.
  • a steel is known to those skilled in the art and contains proportions of carbon, silicon, It contains manganese, chromium, molybdenum, vanadium, and tungsten.
  • Material 1.3343 is hardened at a temperature between 1190°C and 1230°C, achieving a Rockwell hardness between 64 and 66 HRC.
  • the shaft section at least in the portion intended for engagement with the die, has a diameter of no more than 9.8 mm, more preferably no more than 9.5 mm, and most preferably no more than 9.2 mm.
  • the use of a one-piece die with extremely high Rockwell hardness makes it possible to manufacture the shaft section of the die with extremely small diameters without any adverse effects on mechanical stability and service life. Since the diameter of the die essentially defines the diameter of the tube body of the tube packaging blank and the subsequently manufactured tube packaging, this makes it possible to produce tube packaging with a very small diameter and thus a very small internal volume. Tests have shown that with increasing Rockwell hardness, especially when the entire die is manufactured in one piece, increasingly smaller diameters of the shaft section can be achieved.
  • the die head preferably has a spray edge arranged in a region facing the shaft section, projecting circumferentially around the entire circumference of the die head.
  • the spray edge projects, relative to the diameter of the shaft section, preferably between 0.1 and 0.2 mm, and particularly preferably 0.15 mm, beyond the surface of the shaft section around the entire circumference of the die head.
  • the spray edge ensures that the metal, especially the aluminum, from which the tube packaging blank is manufactured, does not contact the shaft section, but rather that the tube body forms at the spray edge.
  • the gap remaining between the spray edge and the die wall defines the wall thickness of the tube packaging blank.
  • the die head has the shape of a torus segment, at least in a partial region located between the injection edge and the shank section.
  • a torus is known to be a bead-shaped surface with a hole.
  • a torus has the shape of a lifebuoy or donut.
  • the surface of a torus is formed by the set of points that are at a fixed distance r from a circle with radius R, where r ⁇ R.
  • the surface of a torus is obtained by rotating a circle about an axis that lies in the plane of the circle and does not intersect the circle.
  • a torus segment, as used in this text, has... This is the case if not the entire circle rotates around the axis, but only an arc of the circle.
  • the device according to the invention is used in flow forming processes.
  • the punch head exerts pressure on the blank inserted into the die, causing the blank material to flow both against and in the direction of pressure.
  • the material flowing in the direction of pressure forms the tube neck, while the material flowing against the direction of pressure moves along the punch head to the injection edge and forms the tube body there.
  • at least a portion of the punch head adjacent to the injection edge is designed in the form of a torus segment.
  • the blank material flows evenly distributed, unimpeded, and without material build-up from the punch head towards the injection edge.
  • the die head has the shape of a torus segment in a portion of the area adjacent to the injection edge.
  • the die head slopes linearly in a vertical section from the circumference of the injection edge to the circumference of the circular cylindrical section of the die head.
  • the slope of this linear section in a vertical section determines the slope of the shoulder of the tube packaging blank and, consequently, the slope of the shoulder of the tube packaging. This slope is typically in the range of 20° to 40°, preferably 27°.
  • the present invention also includes the use of a device for producing a tube packaging blank by extrusion with a press punch, die and ejector as described above for producing tube packaging blanks, wherein the diameter of a tube blank body of the tube packaging blanks is a maximum of 10 mm.
  • the diameter of the tube blank body of a tube packaging blank is understood to be the maximum diameter of a cross-sectional area arranged perpendicular to the main axis of the tube blank body.
  • the main axis of the tube blank body runs through the center of the Authenticity assurance and forms the longitudinal axis of the cylindrically shaped tube blank body.
  • the die base has a perforation arranged concentrically to its circumference.
  • the diameter of the blank is selected such that, after insertion into the die and before the insertion of the press punch, the blank rests on the circumferential ring projecting from the die wall.
  • the press punch is inserted into the die and exerts pressure on the blank.
  • the high pressure exerted by the press punch causes the blank material to flow.
  • the material then flows, as already described, both against and in the direction of pressure.
  • the material flowing in the direction of pressure forms the tube neck with tamper-evident seal, while the material flowing against the direction of pressure forms the tube body.
  • the blank is most preferably made of a metal, in particular aluminum, an aluminum alloy, or copper, with aluminum being especially preferred.
  • a metal in particular aluminum, an aluminum alloy, or copper, with aluminum being especially preferred.
  • the aforementioned materials, and aluminum in particular, exhibit ideal properties for use in extrusion processes for the production of small-volume tube packaging blanks.
  • the material of the blank is selected by a person skilled in the art in the usual manner, depending on the properties desired for the finished tube packaging.
  • step e) Formation of an external thread in the area of a tube neck of the tube packaging blank by rolling or squeezing carried out.
  • An M7 external thread proves to be particularly advantageous in connection with the desired small-volume tube packaging.
  • the present invention also comprises a tube packaging manufactured using one of the tube packaging blanks described above.
  • the finished tube packaging requires only the steps known to those skilled in the art, such as crimping the opening of the tube body of the tube packaging blank facing away from the tube neck.
  • FIG 1 shows a schematic vertical section through a device according to the invention for producing a tube packaging blank by extrusion.
  • the device 1 comprises a die 2, a punch 3, and an ejector 4.
  • the punch 3 comprises a tool holder section 3.1, a shaft section 3.2, and a punch head 3.3.
  • the tool holder section 3.1 is designed for mounting in the tool holder of a conventional press.
  • the die 2 is enclosed by a reinforcing ring 6 for mechanical stabilization.
  • the ejector 4 engages positively in the opening 7 of the die base 2.1 and closes the opening 7 flush with the die base 2.1 (see also Figure 1). Figure 3 ).
  • the tool holder section 3.1, the shank section 3.2 and the punch head 3.3 are formed in one piece from steel 1.3343 with a Rockwell hardness of 65 HRC.
  • the Figure 2A shows in schematic form a vertical section through the press die 3 of the Figure 1
  • FIG. 2B This is a detailed section of the press die according to Figure 2A
  • the area of the die head 3.3 is shown.
  • the injection edge 5 projects over the entire circumference of the die head 3.3 and extends 0.15 mm beyond the surface of the shaft section 3.2 relative to its diameter d. Since the diameter d of the shaft section is 9.5 mm in the illustrated embodiment, the diameter of the die head in the area of the injection edge is 9.8 mm.
  • the injection edge 5 ensures that the aluminum from which the tube packaging blank is produced does not contact the shaft section 3.2, but rather that the tube body is formed at the injection edge 5. This results in a tube packaging blank with an inner diameter of 9.8 mm.
  • the die head 3.3 has the shape of a torus segment in the sub-area 3.31 of the area of the die head 3.3 facing the injection edge 5.
  • the surface of the torus is formed by the set of points that are at a fixed distance r from a circle with radius R, where r ⁇ R.
  • the distance r is 1.3 mm in the illustrated embodiment.
  • the Figure 3 Figure 1 shows a die 2.
  • the die 2 has an interior space 2.4 bounded by a die base 2.1 and a die wall 2.2, wherein the interior space 2.4 forms the negative of the punch head 3.3 including the section of the shaft section 3.2 adjacent to the punch head 3.3.
  • the die base 2.1 has an opening 7 formed concentrically to the circumference of the die base 2.1.
  • the die base 2.1 consists only of a circumferential ring projecting from the die wall 2.2.
  • the connection with the Figures 1 to 3 The described device is used in a compression molding process for the production of tube packaging blanks.
  • the ejector 4 is first inserted from the underside of the die 2, facing away from the press die 3, into the opening 7 of the die base 2.1 and engages positively in the area facing away from the interior of the die 2.4. This closes the opening 7 of the die base 2.1, which is arranged concentrically to the circumference of the die base 2.1, flush with the surface.
  • the blank is then inserted into the die 2.
  • the diameter of the blank is chosen such that, after insertion into the die 2, it rests on the circumferential ring projecting from the die wall 2.2 before the press ram 3 is inserted.
  • the press ram 3 is inserted into the die 2 and pressure is applied to the blank.
  • the high pressure exerted by the press ram 3 causes the aluminum of the blank to flow.
  • the aluminum then flows both against and in the direction of pressure.
  • the material flowing in the direction of pressure forms the tube neck, while the material flowing against the direction of pressure moves along the ram head 3.3 to the injection edge 5 and forms the tube body there.
  • the section 3.31 of the die head 3.3 adjacent to the injection edge 5 is designed in the form of a torus segment. The material from the blank flows evenly distributed, unimpeded, and without material build-up from the die head 3.3 towards the injection edge 5.
  • the thickness of the wall of the tube packaging blank is defined by the gap remaining between the injection edge 5 and the die wall 2.2.
  • FIG. 4A Figure 1 shows a schematic perspective view of a tube packaging blank 10 produced in the described manner.
  • the tube body of the tube packaging blank 10 has a diameter dr of 9.8 mm.
  • an M7 external thread 11 is applied to the neck of the tube packaging blank 10 by rolling or crimping.
  • FIG 4B The schematic representation shows a perspective view of a small-volume tube packaging 13 produced from the tube packaging blank 10. Starting with the tube packaging blank 10, the only remaining step in producing the finished tube packaging 13 is to crimp the opening of the tube packaging blank facing away from the tube neck.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tubes (AREA)
  • Extrusion Of Metal (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (13)

  1. Dispositif (1) pour la fabrication d'ébauches d'emballages tubulaires (10) par extrusion,
    le dispositif comportant une matrice (2), un poinçon (3) et un éjecteur (4),
    le poinçon (3) comportant une partie de logement d'outil (3.1), une section de tige (3.2) et une tête de poinçon (3.3),
    la matrice (2) comportant un espace intérieur (2.4) délimité par un fond de matrice (2.1) et une paroi de matrice (2.2), l'espace intérieur (2.4) de la matrice formant le négatif de la tête de poinçon (3.3), y compris la partie de la section de tige (3.2) adjacente à la tête de poinçon (3.3), prévue pour s'engager dans la matrice (2),
    le fond de la matrice (2.1) présentant une ouverture (7) disposée de manière concentrique par rapport à la périphérie du fond de la matrice (2.1), dans lequel l'éjecteur (4) s'engage par complémentarité de forme dans l'ouverture (7) du fond de matrice (2.1) et ferme l'ouverture (7) à fleur avec le fond de matrice (2.1),
    caractérisé en ce que la section de tige (3.2) est formée d'un seul tenant avec la tête de poinçon (3.3) est formée d'un seul pièce à partir d'un matériau ayant une dureté Rockwell d'au moins 60 HRC, la section de tige (3.2) présentant, au moins dans sa partie prévue pour s'engager dans la matrice (2), la forme d'un cylindre circulaire droit d'un diamètre (d) maximal de 10 mm.
  2. Dispositif (1) selon la revendication 1, caractérisé en ce que le poinçon (3) entire avec la partie de logement d'outil (3.1), la section de tige (3.2) et la tête de poinçon (3.3) est formé d'une seule pièce à partir d'un matériau présentant une dureté Rockwell d'au moins 60 HRC.
  3. Dispositif (1) selon la revendication 1 ou 2, caractérisé en ce que le matériau présente une dureté Rockwell d'au moins 63 HRC.
  4. Dispositif (1) selon l'une des revendications 1 à 3, caractérisé en ce que le matériau est de l'acier 1.3343 avec une dureté Rockwell de 64 HRC à 66 HRC.
  5. Dispositif (1) selon l'une des revendications 1 à 4, caractérisé en ce que la section de tige (3.2) présente, au moins dans sa partie prévue pour s'engager dans la matrice (2), un diamètre (d) maximal de 9,8 mm, de préférence maximal de 9,5 mm, de manière particulièrement préférée maximal de 9,2 mm.
  6. Dispositif (1) selon l'une des revendications 1 à 5, caractérisé en ce que la tête de poinçon (3.3) présente un bord d'éjection (5) disposé dans une zone tournée vers la section de tige (3.2) et faisant saillie sur toute la circonférence de la tête de poinçon (3.3).
  7. Dispositif (1) selon l'une des revendications 1 à 6, caractérisé en ce que la tête de poinçon (3.3) présente la forme d'un segment torique au moins dans une zone partielle (3.31) d'une zone adjacente au bord d'éjection (5).
  8. Dispositif (1) selon la revendication 7, caractérisé en ce que le segment torique est un segment d'un tube torique ayant un rayon (R) compris entre 0,1 mm et 30 mm, de préférence entre 0,5 mm et 10 mm, et de manière particulièrement préférée entre 1 mm et 5 mm.
  9. Utilisation d'un dispositif (1) selon l'une des revendications 1 à 8 pour la fabrication d'ébauches d'emballages tubulaires (10), dans lequel le diamètre (dr) d'un corps d'ébauche tubulaire des ébauches d'emballages tubulaires (10) est au maximum de 10 mm.
  10. Procédé de fabrication d'une ébauche d'emballage tubulaire (10) par extrusion, comprenant les étapes suivantes
    a) fournir un dispositif (1) selon les revendications 1 à 8,
    b) mettre en place d'une ronde dans la matrice (2),
    c) insérer le poinçon (3) dans la matrice (2) et appliquer une pression sur la ronde,
    d) prélever l'ébauche d'emballage tubulaire (10) du matrice (2).
  11. Procédé selon la revendication 10, caractérisé en ce que la ronde consiste en aluminium, en alliage d'aluminium ou en cuivre.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce qu'après l'étape d), l'étape e) former un filetage extérieur (11) dans la zone d'un col du tube de l'ébauche d'emballage tubulaire (10) par roulage ou écrasement,
    est exécutée.
  13. Procédé selon la revendication 12, caractérisé en ce que le filetage extérieur (11) est un filetage M7.
EP24205901.2A 2023-10-25 2024-10-10 Dispositif pour la fabrication de petites ébauches d'emballage tubulaire Active EP4545196B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102023129381.8A DE102023129381B3 (de) 2023-10-25 2023-10-25 Vorrichtung zur Herstellung kleinvolumiger Tubenverpackungsrohlinge

Publications (3)

Publication Number Publication Date
EP4545196A1 EP4545196A1 (fr) 2025-04-30
EP4545196C0 EP4545196C0 (fr) 2026-01-21
EP4545196B1 true EP4545196B1 (fr) 2026-01-21

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Country Status (2)

Country Link
EP (1) EP4545196B1 (fr)
DE (1) DE102023129381B3 (fr)

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