EP4545196A1 - Dispositif pour la fabrication de petites ébauches d'emballage de tubes - Google Patents

Dispositif pour la fabrication de petites ébauches d'emballage de tubes Download PDF

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Publication number
EP4545196A1
EP4545196A1 EP24205901.2A EP24205901A EP4545196A1 EP 4545196 A1 EP4545196 A1 EP 4545196A1 EP 24205901 A EP24205901 A EP 24205901A EP 4545196 A1 EP4545196 A1 EP 4545196A1
Authority
EP
European Patent Office
Prior art keywords
die
blank
shaft section
section
tube
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.)
Granted
Application number
EP24205901.2A
Other languages
German (de)
English (en)
Other versions
EP4545196B1 (fr
EP4545196C0 (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 EP4545196B1 publication Critical patent/EP4545196B1/fr
Publication of EP4545196C0 publication Critical patent/EP4545196C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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 producing small-volume tube packaging blanks.
  • Tube packaging is often formed from blanks produced using an impact extrusion process.
  • Impact extrusion is a forming process in which a workpiece is deformed by applying compressive stress.
  • the direction of material flow relative to the direction of punch movement provides the basis for distinguishing between forward impact extrusion (material flow and punch movement direction are the same), reverse impact extrusion (material flow and punch movement direction are opposite), and transverse impact extrusion (material flow perpendicular to the punch movement direction).
  • the production of a thin-walled metal tube by reverse extrusion is DE 29 32 016 A1 described.
  • the DE 40 26 921 A1 also describes a method for producing a thin-walled metal tube.
  • production is carried out by extrusion using a circular blank whose material is forced to flow under high pressure.
  • the blank material flows both against the direction of pressure 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 present invention is based on the object of providing a device for producing tube packaging, with the aid of which small-volume metal tube packaging can be reproducibly produced in large quantities with low waste.
  • This object 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 emerge from the dependent claims, the description, and the drawings.
  • the present invention provides a device for producing tube packaging blanks by extrusion.
  • the device has a die, a press punch, and an ejector.
  • the press punch comprises a tool receiving section, a shaft section, and a punch head.
  • the shaft section, together with the punch head, is formed in one piece from a material with a Rockwell hardness of at least 60 HRC, wherein the shaft section, at least in its section intended for engagement with the die, has the shape of a right circular cylinder with a maximum diameter of 10 mm.
  • the die has a die interior delimited by a die bottom and a die wall, wherein the die interior forms the negative of the punch head, including the section of the shaft section adjacent to the punch head and intended for engagement with the die.
  • the die bottom has an opening arranged concentrically to the circumference of the die bottom. The ejector engages positively with the opening in 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 introduced into the die in the form of a round blank.
  • the die base has an opening arranged concentrically to the circumference of the die base.
  • the round blank therefore does not lie fully on the die base, but is merely supported by a circumferential ring projecting from the die wall.
  • the material of the round blank is is caused to flow by the high pressure exerted by the press ram.
  • the material of the blank flows under this pressure both against the direction of pressure 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 in the die base and closes the opening flush with the die base. On the surface of the ejector that closes the opening in the die base, a closure of the tube neck is formed, which assumes the function of tamper evidence in the subsequently produced tube packaging.
  • the one-piece design of the shaft section and punch head which are manufactured from a single material as a single piece, completely avoids the tool breakages frequently observed in the 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 little waste using the extrusion process. With the one-piece design of the shaft section and punch head provided according to the invention, the replacement of the punch head, which is known from the prior art and may become necessary due to material wear, is not possible. However, this disadvantage is far outweighed by the advantages of a one-piece design, which are described in more detail below.
  • the inventive use of a material with a Rockwell hardness of at least 60 HRC makes it possible to manufacture the shaft section formed from this material, which, at least in the section intended for engagement with the die, has the shape of a right circular cylinder, with an extremely small diameter of a maximum of 10 mm. Practical use has shown that this type of press die can be used to produce tube packaging blanks with a maximum tube body diameter of 10 mm. Production takes place at high throughputs while maintaining an extremely low scrap rate of less than 3%.
  • a cylinder is a surface whose points are equidistant from a fixed 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 oriented perpendicular to the cylinder axis, the cylinder is a right circular cylinder with a cylinder height zh and a 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, familiar to experts.
  • the unit HRC is composed of the acronym "HR” for "Rockwell Hardness,” which indicates the type of testing method, and the letter “C,” which indicates the scale and thus the test force and the test specimen.
  • HRC Rockwell Hardness
  • a diamond cone with a 120° acute angle is applied to the material to be 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 receiving section can be provided that is screwed to the shaft section and thus 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 receiving section, shaft section, and ram head are made from the same material in one piece.
  • the entire press ram has an extremely high resistance to mechanical stress, a long service life, and is ideally suited for use in the device according to the invention.
  • the tool receiving section of the press ram is intended for fastening in the tool holder of a conventional press.
  • Particularly preferred embodiments are those in which the material from which at least the shaft section and punch head are manufactured as a single piece, preferably the tool holder section, shaft section and punch head are manufactured as a single piece, has a Rockwell hardness of at least 63 HRC.
  • a shaft section formed from such a material, which at least in its section intended for engagement with the die has the shape of a right 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. In practical use, it has been shown that this type of press punch can be used to produce tube packaging blanks with a tube body diameter of less than 10 mm. Production takes place at high throughputs and, at the same time, with extremely low scrap rates of less than 3%.
  • the material from which at least the shaft section and punch head are manufactured in one piece is a steel 1.3343 with a Rockwell hardness of 64 HRC to 66 HRC.
  • a steel is known to the person skilled in the art and has proportions of carbon, silicon, Manganese, chromium, molybdenum, vanadium, and tungsten.
  • the material 1.3343 is hardened at a temperature between 1190°C and 1230°C, which allows a Rockwell hardness of between 64 and 66 HRC to be achieved.
  • the shaft section has a maximum diameter of 9.8 mm, more preferably a maximum of 9.5 mm, and especially preferably a maximum of 9.2 mm, at least in its section intended for engagement with the die.
  • the use of a one-piece press die with an extremely high Rockwell hardness makes it possible to manufacture the shaft section of the press die with extremely small diameters without any adverse effects on mechanical stability and service life. Since the diameter of the press die essentially defines the diameter of the tube body of the tube packaging blank and the tube packaging subsequently manufactured from it, this makes it possible to manufacture tube packaging with a very small diameter and thus very small internal volume. Tests have shown that with increasing Rockwell hardness, particularly with one-piece production of the entire press die, increasingly smaller diameters of the shaft section can be achieved.
  • the punch head has a spray edge arranged in an area facing the shaft section and projecting circumferentially over the entire circumference of the punch head.
  • the spray edge projects, relative to the diameter of the shaft section, preferably between 0.1 and 0.2 mm, particularly preferably 0.15 mm, over the entire circumference of the punch head beyond the jacket of the shaft section.
  • the spray edge ensures that the metal, in particular the aluminum, from which the tube packaging blank is produced does not adhere to 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 thickness of the wall of the tube packaging blank.
  • the punch head has the shape of a torus segment, at least in a partial area arranged between the injection edge and the shaft section.
  • a torus is known to be a bead-like surface with a hole.
  • a torus therefore 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 circular line with radius R, where r ⁇ R.
  • the surface of a torus is obtained by rotating a circle around an axis that lies in the plane of the circle and does not intersect the circle.
  • a torus segment, as defined in the present text is obtained when not the entire circle rotates around the axis, but only an arc of a circle.
  • the device according to the invention is used in extrusion processes.
  • the punch head exerts pressure on the blank inserted into the die, whereby the material of the blank begins to flow both against the direction of pressure 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 there forms the tube body.
  • at least a portion of a region of the punch head adjacent to the injection edge is designed in the shape of a torus segment.
  • the material of the blank flows evenly distributed, unhindered and without material blockage from the punch head towards the injection edge.
  • the stamping head has the shape of a torus segment in a portion of an area adjacent to the injection edge. Directly adjacent to the injection edge, i.e., in the area between the injection edge and the torus segment, the stamping head runs in a vertical section, rising linearly from the circumference of the injection edge to the circumference of the circular-cylindrical section of the stamping head.
  • the gradient of this section which is linear in vertical section, determines the gradient of the shoulder of the tube packaging blank and thus subsequently the gradient of the shoulder of the tube packaging. This gradient is typically in the range between 20° and 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 Tamper evidence and forms the longitudinal axis of the cylindrical tube blank body.
  • the die base has an opening arranged concentrically to the circumference of the die base.
  • the diameter of the blank is selected such that, after being inserted into the die, the blank rests on the circumferential ring protruding from the die wall before the pressing ram is inserted.
  • the pressing ram is then inserted into the die and exerts pressure on the blank.
  • the material of the blank is caused to flow by the high pressure exerted by the pressing ram.
  • the material of the blank then flows, as already described, both against the direction of pressure and in the direction of pressure.
  • the material flowing in the direction of pressure forms the tube neck with tamper-evident closure, while the material flowing against the direction of pressure forms the tube body.
  • the blank is particularly preferably made of a metal, in particular aluminum, an aluminum alloy, or copper, with aluminum being particularly preferred. These materials, and aluminum in particular, exhibit ideal properties for use in impact molding processes for the production of small-volume tube packaging blanks.
  • the selection of the blank material is typically made by a person skilled in the art depending on the desired properties for the finished tube packaging.
  • the present invention also encompasses a tube packaging produced using one of the tube packaging blanks described above.
  • a tube packaging blank produced according to an embodiment of the present invention only the steps known to the person skilled in the art, such as flanging the opening of the tube body of the tube packaging blank facing away from the tube neck, need to be performed to produce the finished tube packaging.
  • the Figure 1 shows a schematic representation of a vertical section through an apparatus according to the invention for producing a tube packaging blank by extrusion.
  • the apparatus 1 comprises a die 2, a press die 3, and an ejector 4.
  • the press die 3 comprises a tool receiving section 3.1, a shaft section 3.2, and a die head 3.3.
  • the tool receiving section 3.1 is provided for fastening 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 3 ).
  • the tool holder section 3.1, the shaft section 3.2 and the punch head 3.3 are formed together in one piece from steel 1.3343 with a Rockwell hardness of 65 HRC.
  • the Figure 2A shows a schematic representation of a vertical section through the press ram 3 of the Figure 1 .
  • FIG 2B is a detailed section of the press stamp according to Figure 2A shown, namely the area of the stamping head 3.3.
  • the spray edge 5 projects over the entire circumference of the stamping head 3.3 and, relative to the diameter d of the shaft section 3.2, projects over the entire circumference of the stamping head by 0.15 mm beyond the jacket of the shaft section 3.2. Since the diameter d of the shaft section in the illustrated embodiment is 9.5 mm, the diameter of the stamping head in the area of the spray edge is 9.8 mm.
  • the spray edge 5 ensures that the aluminum from which the tube packaging blank is made does not adhere to the shaft section 3.2, but rather the tube body forms on the spray edge 5. This results in a tube packaging blank with an inner diameter of 9.8 mm.
  • the punch head 3.3 has the shape of a torus segment in the partial area 3.31 of the area of the punch 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 circular line with radius R, where r ⁇ R.
  • the distance r is 1.3 mm in the illustrated embodiment.
  • the Figure 3 shows a die 2.
  • the die 2 has a die interior 2.4 delimited by a die base 2.1 and a die wall 2.2, wherein the die interior 2.4 forms the negative of the punch head 3.3, including the portion 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 merely of a circumferential ring protruding from the die wall 2.2.
  • the Figures 1 to 3 The device described is used in an extrusion process for producing tube packaging blanks.
  • the ejector 4 is first inserted from the underside of the die 2 facing away from the press ram 3 into the opening 7 of the die base 2.1 and engages positively in the area facing away from the die interior 2.4.
  • the opening 7 of the die base 2.1 which is arranged concentrically to the circumference of the die base 2.1, is closed flush.
  • the blank is then inserted into the die 2.
  • the diameter of the blank is selected such that, after being inserted into the die 2 and before the pressing punch 3 is inserted, the blank rests on the circumferential ring protruding from the die wall 2.2.
  • the pressing punch 3 is then inserted into the die 2 and pressure is exerted on the blank.
  • the aluminum in the blank is caused to flow by the high pressure exerted by the pressing punch 3.
  • the aluminum then flows both against the direction of pressure 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 3.3 to the injection edge 5 and there forms the tube body.
  • the section 3.31 of the area of the punch head 3.3 adjacent to the injection edge 5 is designed in the shape of a torus segment. The material of the disc flows evenly distributed, unhindered, and without material blockage from the punch head 3.3 toward the injection edge 5.
  • the gap remaining between the injection edge 5 and the die wall 2.2 defines the thickness of the wall of the tube packaging blank.
  • the Figure 4A shows a schematic perspective view of a tube packaging blank 10 produced in the manner described.
  • the tube body of the tube packaging blank 10 has a diameter dr of 9.8 mm.
  • Clearly visible is the tamper-evident seal 12 formed on the surface of the ejector 4 that closes the opening 7 in the die base 2.1.
  • an M7 external thread 11 is applied in the area of the tube neck of the tube packaging blank 10 by rolling or squeezing.
  • FIG 4B A schematic perspective view of a small-volume tube packaging 13 produced from the tube packaging blank 10 is shown. Starting from the tube packaging blank 10, all that remains to be done to produce the finished tube packaging 13 is to crimp the opening of the tube packaging blank facing away from the tube neck.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Tubes (AREA)
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 true EP4545196A1 (fr) 2025-04-30
EP4545196B1 EP4545196B1 (fr) 2026-01-21
EP4545196C0 EP4545196C0 (fr) 2026-01-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP24205901.2A Active EP4545196B1 (fr) 2023-10-25 2024-10-10 Dispositif pour la fabrication de petites ébauches d'emballage tubulaire

Country Status (2)

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

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2023879A (en) * 1933-01-09 1935-12-10 Sun Tube Corp Extrusion press
US2042836A (en) * 1934-01-19 1936-06-02 Sun Tube Corp Collapsible tube
US2112085A (en) * 1936-11-20 1938-03-22 Sun Tube Corp Thin metal container
US2160963A (en) * 1936-04-30 1939-06-06 Sun Tube Corp Collapsible container
DE2932016A1 (de) 1978-08-08 1980-02-28 Kyodo Printing Co Ltd Vorrichtung und verfahren zum herstellen einer duennwandigen metalltube
US5042283A (en) * 1989-10-30 1991-08-27 Taisei Kako Co. Aluminum tube manufacturing device
DE4026921A1 (de) 1990-08-25 1992-02-27 Tubex Gmbh Verfahren zur herstellung einer metalltube, ronde zur herstellung einer solchen tube und danach hergestellte metalltube
EP1586389A1 (fr) * 2002-07-26 2005-10-19 Taisei Kako Co., Ltd. Dispositif de production d'un tube metallique a section ovale et procede de production associe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53133570A (en) * 1977-04-28 1978-11-21 Kyodo Printing Co Ltd Manufacturing method of compound tube
CN103639227B (zh) * 2013-12-09 2016-03-09 哈尔滨工业大学 一种制造超薄壁微小圆筒件的模具与方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2023879A (en) * 1933-01-09 1935-12-10 Sun Tube Corp Extrusion press
US2042836A (en) * 1934-01-19 1936-06-02 Sun Tube Corp Collapsible tube
US2160963A (en) * 1936-04-30 1939-06-06 Sun Tube Corp Collapsible container
US2112085A (en) * 1936-11-20 1938-03-22 Sun Tube Corp Thin metal container
DE2932016A1 (de) 1978-08-08 1980-02-28 Kyodo Printing Co Ltd Vorrichtung und verfahren zum herstellen einer duennwandigen metalltube
US4321816A (en) * 1978-08-08 1982-03-30 Kyodo Insatsu Kabushiki Kaisha Metal tube and apparatus and method for manufacturing the same
US5042283A (en) * 1989-10-30 1991-08-27 Taisei Kako Co. Aluminum tube manufacturing device
DE4026921A1 (de) 1990-08-25 1992-02-27 Tubex Gmbh Verfahren zur herstellung einer metalltube, ronde zur herstellung einer solchen tube und danach hergestellte metalltube
EP1586389A1 (fr) * 2002-07-26 2005-10-19 Taisei Kako Co., Ltd. Dispositif de production d'un tube metallique a section ovale et procede de production associe

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Publication number Publication date
DE102023129381B3 (de) 2024-11-07
EP4545196B1 (fr) 2026-01-21
EP4545196C0 (fr) 2026-01-21

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